drivers/gpu/drm/vc4/vc4_hdmi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2015 Broadcom
   4  * Copyright (c) 2014 The Linux Foundation. All rights reserved.
   5  * Copyright (C) 2013 Red Hat
   6  * Author: Rob Clark <robdclark@gmail.com>
   7  */
   8
   9 /**
  10  * DOC: VC4 Falcon HDMI module
  11  *
  12  * The HDMI core has a state machine and a PHY.  On BCM2835, most of
  13  * the unit operates off of the HSM clock from CPRMAN.  It also
  14  * internally uses the PLLH_PIX clock for the PHY.
  15  *
  16  * HDMI infoframes are kept within a small packet ram, where each
  17  * packet can be individually enabled for including in a frame.
  18  *
  19  * HDMI audio is implemented entirely within the HDMI IP block.  A
  20  * register in the HDMI encoder takes SPDIF frames from the DMA engine
  21  * and transfers them over an internal MAI (multi-channel audio
  22  * interconnect) bus to the encoder side for insertion into the video
  23  * blank regions.
  24  *
  25  * The driver's HDMI encoder does not yet support power management.
  26  * The HDMI encoder's power domain and the HSM/pixel clocks are kept
  27  * continuously running, and only the HDMI logic and packet ram are
  28  * powered off/on at disable/enable time.
  29  *
  30  * The driver does not yet support CEC control, though the HDMI
  31  * encoder block has CEC support.
  32  */
  33
  34 #include <drm/display/drm_hdmi_helper.h>
  35 #include <drm/display/drm_scdc_helper.h>
  36 #include <drm/drm_atomic_helper.h>
  37 #include <drm/drm_drv.h>
  38 #include <drm/drm_edid.h>
  39 #include <drm/drm_probe_helper.h>
  40 #include <drm/drm_simple_kms_helper.h>
  41 #include <linux/clk.h>
  42 #include <linux/component.h>
  43 #include <linux/gpio/consumer.h>
  44 #include <linux/i2c.h>
  45 #include <linux/of.h>
  46 #include <linux/of_address.h>
  47 #include <linux/pm_runtime.h>
  48 #include <linux/rational.h>
  49 #include <linux/reset.h>
  50 #include <sound/dmaengine_pcm.h>
  51 #include <sound/hdmi-codec.h>
  52 #include <sound/pcm_drm_eld.h>
  53 #include <sound/pcm_params.h>
  54 #include <sound/soc.h>
  55 #include "media/cec.h"
  56 #include "vc4_drv.h"
  57 #include "vc4_hdmi.h"
  58 #include "vc4_hdmi_regs.h"
  59 #include "vc4_regs.h"
  60
  61 #define VC5_HDMI_HORZA_HFP_SHIFT                16
  62 #define VC5_HDMI_HORZA_HFP_MASK                 VC4_MASK(28, 16)
  63 #define VC5_HDMI_HORZA_VPOS                     BIT(15)
  64 #define VC5_HDMI_HORZA_HPOS                     BIT(14)
  65 #define VC5_HDMI_HORZA_HAP_SHIFT                0
  66 #define VC5_HDMI_HORZA_HAP_MASK                 VC4_MASK(13, 0)
  67
  68 #define VC5_HDMI_HORZB_HBP_SHIFT                16
  69 #define VC5_HDMI_HORZB_HBP_MASK                 VC4_MASK(26, 16)
  70 #define VC5_HDMI_HORZB_HSP_SHIFT                0
  71 #define VC5_HDMI_HORZB_HSP_MASK                 VC4_MASK(10, 0)
  72
  73 #define VC5_HDMI_VERTA_VSP_SHIFT                24
  74 #define VC5_HDMI_VERTA_VSP_MASK                 VC4_MASK(28, 24)
  75 #define VC5_HDMI_VERTA_VFP_SHIFT                16
  76 #define VC5_HDMI_VERTA_VFP_MASK                 VC4_MASK(22, 16)
  77 #define VC5_HDMI_VERTA_VAL_SHIFT                0
  78 #define VC5_HDMI_VERTA_VAL_MASK                 VC4_MASK(12, 0)
  79
  80 #define VC5_HDMI_VERTB_VSPO_SHIFT               16
  81 #define VC5_HDMI_VERTB_VSPO_MASK                VC4_MASK(29, 16)
  82
  83 #define VC4_HDMI_MISC_CONTROL_PIXEL_REP_SHIFT   0
  84 #define VC4_HDMI_MISC_CONTROL_PIXEL_REP_MASK    VC4_MASK(3, 0)
  85 #define VC5_HDMI_MISC_CONTROL_PIXEL_REP_SHIFT   0
  86 #define VC5_HDMI_MISC_CONTROL_PIXEL_REP_MASK    VC4_MASK(3, 0)
  87
  88 #define VC5_HDMI_SCRAMBLER_CTL_ENABLE           BIT(0)
  89
  90 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_SHIFT      8
  91 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK       VC4_MASK(10, 8)
  92
  93 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_SHIFT          0
  94 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_MASK           VC4_MASK(3, 0)
  95
  96 #define VC5_HDMI_GCP_CONFIG_GCP_ENABLE          BIT(31)
  97
  98 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_SHIFT  8
  99 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_MASK   VC4_MASK(15, 8)
 100
 101 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_0_MASK   VC4_MASK(7, 0)
 102 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_0_SET_AVMUTE     BIT(0)
 103 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_0_CLEAR_AVMUTE   BIT(4)
 104
 105 # define VC4_HD_M_SW_RST                        BIT(2)
 106 # define VC4_HD_M_ENABLE                        BIT(0)
 107
 108 #define HSM_MIN_CLOCK_FREQ      120000000
 109 #define CEC_CLOCK_FREQ 40000
 110
 111 #define HDMI_14_MAX_TMDS_CLK   (340 * 1000 * 1000)
 112
 113 static const char * const output_format_str[] = {
 114         [VC4_HDMI_OUTPUT_RGB]           = "RGB",
 115         [VC4_HDMI_OUTPUT_YUV420]        = "YUV 4:2:0",
 116         [VC4_HDMI_OUTPUT_YUV422]        = "YUV 4:2:2",
 117         [VC4_HDMI_OUTPUT_YUV444]        = "YUV 4:4:4",
 118 };
 119
 120 static const char *vc4_hdmi_output_fmt_str(enum vc4_hdmi_output_format fmt)
 121 {
 122         if (fmt >= ARRAY_SIZE(output_format_str))
 123                 return "invalid";
 124
 125         return output_format_str[fmt];
 126 }
 127
 128 static unsigned long long
 129 vc4_hdmi_encoder_compute_mode_clock(const struct drm_display_mode *mode,
 130                                     unsigned int bpc, enum vc4_hdmi_output_format fmt);
 131
 132 static bool vc4_hdmi_supports_scrambling(struct vc4_hdmi *vc4_hdmi)
 133 {
 134         struct drm_display_info *display = &vc4_hdmi->connector.display_info;
 135
 136         lockdep_assert_held(&vc4_hdmi->mutex);
 137
 138         if (!display->is_hdmi)
 139                 return false;
 140
 141         if (!display->hdmi.scdc.supported ||
 142             !display->hdmi.scdc.scrambling.supported)
 143                 return false;
 144
 145         return true;
 146 }
 147
 148 static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode,
 149                                            unsigned int bpc,
 150                                            enum vc4_hdmi_output_format fmt)
 151 {
 152         unsigned long long clock = vc4_hdmi_encoder_compute_mode_clock(mode, bpc, fmt);
 153
 154         return clock > HDMI_14_MAX_TMDS_CLK;
 155 }
 156
 157 static bool vc4_hdmi_is_full_range(struct vc4_hdmi *vc4_hdmi,
 158                                    struct vc4_hdmi_connector_state *vc4_state)
 159 {
 160         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
 161         struct drm_display_info *display = &vc4_hdmi->connector.display_info;
 162
 163         if (vc4_state->broadcast_rgb == VC4_HDMI_BROADCAST_RGB_LIMITED)
 164                 return false;
 165         else if (vc4_state->broadcast_rgb == VC4_HDMI_BROADCAST_RGB_FULL)
 166                 return true;
 167
 168         return !display->is_hdmi ||
 169                 drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL;
 170 }
 171
 172 static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
 173 {
 174         struct drm_debugfs_entry *entry = m->private;
 175         struct vc4_hdmi *vc4_hdmi = entry->file.data;
 176         struct drm_device *drm = vc4_hdmi->connector.dev;
 177         struct drm_printer p = drm_seq_file_printer(m);
 178         int idx;
 179
 180         if (!drm_dev_enter(drm, &idx))
 181                 return -ENODEV;
 182
 183         drm_print_regset32(&p, &vc4_hdmi->hdmi_regset);
 184         drm_print_regset32(&p, &vc4_hdmi->hd_regset);
 185         drm_print_regset32(&p, &vc4_hdmi->cec_regset);
 186         drm_print_regset32(&p, &vc4_hdmi->csc_regset);
 187         drm_print_regset32(&p, &vc4_hdmi->dvp_regset);
 188         drm_print_regset32(&p, &vc4_hdmi->phy_regset);
 189         drm_print_regset32(&p, &vc4_hdmi->ram_regset);
 190         drm_print_regset32(&p, &vc4_hdmi->rm_regset);
 191
 192         drm_dev_exit(idx);
 193
 194         return 0;
 195 }
 196
 197 static void vc4_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
 198 {
 199         struct drm_device *drm = vc4_hdmi->connector.dev;
 200         unsigned long flags;
 201         int idx;
 202
 203         /*
 204          * We can be called by our bind callback, when the
 205          * connector->dev pointer might not be initialised yet.
 206          */
 207         if (drm && !drm_dev_enter(drm, &idx))
 208                 return;
 209
 210         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 211
 212         HDMI_WRITE(HDMI_M_CTL, VC4_HD_M_SW_RST);
 213         udelay(1);
 214         HDMI_WRITE(HDMI_M_CTL, 0);
 215
 216         HDMI_WRITE(HDMI_M_CTL, VC4_HD_M_ENABLE);
 217
 218         HDMI_WRITE(HDMI_SW_RESET_CONTROL,
 219                    VC4_HDMI_SW_RESET_HDMI |
 220                    VC4_HDMI_SW_RESET_FORMAT_DETECT);
 221
 222         HDMI_WRITE(HDMI_SW_RESET_CONTROL, 0);
 223
 224         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 225
 226         if (drm)
 227                 drm_dev_exit(idx);
 228 }
 229
 230 static void vc5_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
 231 {
 232         struct drm_device *drm = vc4_hdmi->connector.dev;
 233         unsigned long flags;
 234         int idx;
 235
 236         /*
 237          * We can be called by our bind callback, when the
 238          * connector->dev pointer might not be initialised yet.
 239          */
 240         if (drm && !drm_dev_enter(drm, &idx))
 241                 return;
 242
 243         reset_control_reset(vc4_hdmi->reset);
 244
 245         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 246
 247         HDMI_WRITE(HDMI_DVP_CTL, 0);
 248
 249         HDMI_WRITE(HDMI_CLOCK_STOP,
 250                    HDMI_READ(HDMI_CLOCK_STOP) | VC4_DVP_HT_CLOCK_STOP_PIXEL);
 251
 252         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 253
 254         if (drm)
 255                 drm_dev_exit(idx);
 256 }
 257
 258 #ifdef CONFIG_DRM_VC4_HDMI_CEC
 259 static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi)
 260 {
 261         struct drm_device *drm = vc4_hdmi->connector.dev;
 262         unsigned long cec_rate;
 263         unsigned long flags;
 264         u16 clk_cnt;
 265         u32 value;
 266         int idx;
 267
 268         /*
 269          * This function is called by our runtime_resume implementation
 270          * and thus at bind time, when we haven't registered our
 271          * connector yet and thus don't have a pointer to the DRM
 272          * device.
 273          */
 274         if (drm && !drm_dev_enter(drm, &idx))
 275                 return;
 276
 277         cec_rate = clk_get_rate(vc4_hdmi->cec_clock);
 278
 279         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 280
 281         value = HDMI_READ(HDMI_CEC_CNTRL_1);
 282         value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK;
 283
 284         /*
 285          * Set the clock divider: the hsm_clock rate and this divider
 286          * setting will give a 40 kHz CEC clock.
 287          */
 288         clk_cnt = cec_rate / CEC_CLOCK_FREQ;
 289         value |= clk_cnt << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT;
 290         HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
 291
 292         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 293
 294         if (drm)
 295                 drm_dev_exit(idx);
 296 }
 297 #else
 298 static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) {}
 299 #endif
 300
 301 static int reset_pipe(struct drm_crtc *crtc,
 302                         struct drm_modeset_acquire_ctx *ctx)
 303 {
 304         struct drm_atomic_state *state;
 305         struct drm_crtc_state *crtc_state;
 306         int ret;
 307
 308         state = drm_atomic_state_alloc(crtc->dev);
 309         if (!state)
 310                 return -ENOMEM;
 311
 312         state->acquire_ctx = ctx;
 313
 314         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 315         if (IS_ERR(crtc_state)) {
 316                 ret = PTR_ERR(crtc_state);
 317                 goto out;
 318         }
 319
 320         crtc_state->connectors_changed = true;
 321
 322         ret = drm_atomic_commit(state);
 323 out:
 324         drm_atomic_state_put(state);
 325
 326         return ret;
 327 }
 328
 329 static int vc4_hdmi_reset_link(struct drm_connector *connector,
 330                                struct drm_modeset_acquire_ctx *ctx)
 331 {
 332         struct drm_device *drm;
 333         struct vc4_hdmi *vc4_hdmi;
 334         struct drm_connector_state *conn_state;
 335         struct drm_crtc_state *crtc_state;
 336         struct drm_crtc *crtc;
 337         bool scrambling_needed;
 338         u8 config;
 339         int ret;
 340
 341         if (!connector)
 342                 return 0;
 343
 344         drm = connector->dev;
 345         ret = drm_modeset_lock(&drm->mode_config.connection_mutex, ctx);
 346         if (ret)
 347                 return ret;
 348
 349         conn_state = connector->state;
 350         crtc = conn_state->crtc;
 351         if (!crtc)
 352                 return 0;
 353
 354         ret = drm_modeset_lock(&crtc->mutex, ctx);
 355         if (ret)
 356                 return ret;
 357
 358         crtc_state = crtc->state;
 359         if (!crtc_state->active)
 360                 return 0;
 361
 362         vc4_hdmi = connector_to_vc4_hdmi(connector);
 363         mutex_lock(&vc4_hdmi->mutex);
 364
 365         if (!vc4_hdmi_supports_scrambling(vc4_hdmi)) {
 366                 mutex_unlock(&vc4_hdmi->mutex);
 367                 return 0;
 368         }
 369
 370         scrambling_needed = vc4_hdmi_mode_needs_scrambling(&vc4_hdmi->saved_adjusted_mode,
 371                                                            vc4_hdmi->output_bpc,
 372                                                            vc4_hdmi->output_format);
 373         if (!scrambling_needed) {
 374                 mutex_unlock(&vc4_hdmi->mutex);
 375                 return 0;
 376         }
 377
 378         if (conn_state->commit &&
 379             !try_wait_for_completion(&conn_state->commit->hw_done)) {
 380                 mutex_unlock(&vc4_hdmi->mutex);
 381                 return 0;
 382         }
 383
 384         ret = drm_scdc_readb(connector->ddc, SCDC_TMDS_CONFIG, &config);
 385         if (ret < 0) {
 386                 drm_err(drm, "Failed to read TMDS config: %d\n", ret);
 387                 mutex_unlock(&vc4_hdmi->mutex);
 388                 return 0;
 389         }
 390
 391         if (!!(config & SCDC_SCRAMBLING_ENABLE) == scrambling_needed) {
 392                 mutex_unlock(&vc4_hdmi->mutex);
 393                 return 0;
 394         }
 395
 396         mutex_unlock(&vc4_hdmi->mutex);
 397
 398         /*
 399          * HDMI 2.0 says that one should not send scrambled data
 400          * prior to configuring the sink scrambling, and that
 401          * TMDS clock/data transmission should be suspended when
 402          * changing the TMDS clock rate in the sink. So let's
 403          * just do a full modeset here, even though some sinks
 404          * would be perfectly happy if were to just reconfigure
 405          * the SCDC settings on the fly.
 406          */
 407         return reset_pipe(crtc, ctx);
 408 }
 409
 410 static void vc4_hdmi_handle_hotplug(struct vc4_hdmi *vc4_hdmi,
 411                                     struct drm_modeset_acquire_ctx *ctx,
 412                                     enum drm_connector_status status)
 413 {
 414         struct drm_connector *connector = &vc4_hdmi->connector;
 415         struct edid *edid;
 416         int ret;
 417
 418         /*
 419          * NOTE: This function should really be called with
 420          * vc4_hdmi->mutex held, but doing so results in reentrancy
 421          * issues since cec_s_phys_addr_from_edid might call
 422          * .adap_enable, which leads to that funtion being called with
 423          * our mutex held.
 424          *
 425          * A similar situation occurs with vc4_hdmi_reset_link() that
 426          * will call into our KMS hooks if the scrambling was enabled.
 427          *
 428          * Concurrency isn't an issue at the moment since we don't share
 429          * any state with any of the other frameworks so we can ignore
 430          * the lock for now.
 431          */
 432
 433         if (status == connector_status_disconnected) {
 434                 cec_phys_addr_invalidate(vc4_hdmi->cec_adap);
 435                 return;
 436         }
 437
 438         edid = drm_get_edid(connector, vc4_hdmi->ddc);
 439         if (!edid)
 440                 return;
 441
 442         cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
 443         kfree(edid);
 444
 445         for (;;) {
 446                 ret = vc4_hdmi_reset_link(connector, ctx);
 447                 if (ret == -EDEADLK) {
 448                         drm_modeset_backoff(ctx);
 449                         continue;
 450                 }
 451
 452                 break;
 453         }
 454 }
 455
 456 static int vc4_hdmi_connector_detect_ctx(struct drm_connector *connector,
 457                                          struct drm_modeset_acquire_ctx *ctx,
 458                                          bool force)
 459 {
 460         struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
 461         enum drm_connector_status status = connector_status_disconnected;
 462
 463         /*
 464          * NOTE: This function should really take vc4_hdmi->mutex, but
 465          * doing so results in reentrancy issues since
 466          * vc4_hdmi_handle_hotplug() can call into other functions that
 467          * would take the mutex while it's held here.
 468          *
 469          * Concurrency isn't an issue at the moment since we don't share
 470          * any state with any of the other frameworks so we can ignore
 471          * the lock for now.
 472          */
 473
 474         WARN_ON(pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev));
 475
 476         if (vc4_hdmi->hpd_gpio) {
 477                 if (gpiod_get_value_cansleep(vc4_hdmi->hpd_gpio))
 478                         status = connector_status_connected;
 479         } else {
 480                 if (vc4_hdmi->variant->hp_detect &&
 481                     vc4_hdmi->variant->hp_detect(vc4_hdmi))
 482                         status = connector_status_connected;
 483         }
 484
 485         vc4_hdmi_handle_hotplug(vc4_hdmi, ctx, status);
 486         pm_runtime_put(&vc4_hdmi->pdev->dev);
 487
 488         return status;
 489 }
 490
 491 static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
 492 {
 493         struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
 494         struct vc4_dev *vc4 = to_vc4_dev(connector->dev);
 495         int ret = 0;
 496         struct edid *edid;
 497
 498         /*
 499          * NOTE: This function should really take vc4_hdmi->mutex, but
 500          * doing so results in reentrancy issues since
 501          * cec_s_phys_addr_from_edid might call .adap_enable, which
 502          * leads to that funtion being called with our mutex held.
 503          *
 504          * Concurrency isn't an issue at the moment since we don't share
 505          * any state with any of the other frameworks so we can ignore
 506          * the lock for now.
 507          */
 508
 509         edid = drm_get_edid(connector, vc4_hdmi->ddc);
 510         cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
 511         if (!edid)
 512                 return 0;
 513
 514         drm_connector_update_edid_property(connector, edid);
 515         ret = drm_add_edid_modes(connector, edid);
 516         kfree(edid);
 517
 518         if (!vc4->hvs->vc5_hdmi_enable_hdmi_20) {
 519                 struct drm_device *drm = connector->dev;
 520                 const struct drm_display_mode *mode;
 521
 522                 list_for_each_entry(mode, &connector->probed_modes, head) {
 523                         if (vc4_hdmi_mode_needs_scrambling(mode, 8, VC4_HDMI_OUTPUT_RGB)) {
 524                                 drm_warn_once(drm, "The core clock cannot reach frequencies high enough to support 4k @ 60Hz.");
 525                                 drm_warn_once(drm, "Please change your config.txt file to add hdmi_enable_4kp60.");
 526                         }
 527                 }
 528         }
 529
 530         return ret;
 531 }
 532
 533 static int vc4_hdmi_connector_atomic_check(struct drm_connector *connector,
 534                                            struct drm_atomic_state *state)
 535 {
 536         struct drm_connector_state *old_state =
 537                 drm_atomic_get_old_connector_state(state, connector);
 538         struct vc4_hdmi_connector_state *old_vc4_state =
 539                 conn_state_to_vc4_hdmi_conn_state(old_state);
 540         struct drm_connector_state *new_state =
 541                 drm_atomic_get_new_connector_state(state, connector);
 542         struct vc4_hdmi_connector_state *new_vc4_state =
 543                 conn_state_to_vc4_hdmi_conn_state(new_state);
 544         struct drm_crtc *crtc = new_state->crtc;
 545
 546         if (!crtc)
 547                 return 0;
 548
 549         if (old_state->tv.margins.left != new_state->tv.margins.left ||
 550             old_state->tv.margins.right != new_state->tv.margins.right ||
 551             old_state->tv.margins.top != new_state->tv.margins.top ||
 552             old_state->tv.margins.bottom != new_state->tv.margins.bottom) {
 553                 struct drm_crtc_state *crtc_state;
 554                 int ret;
 555
 556                 crtc_state = drm_atomic_get_crtc_state(state, crtc);
 557                 if (IS_ERR(crtc_state))
 558                         return PTR_ERR(crtc_state);
 559
 560                 /*
 561                  * Strictly speaking, we should be calling
 562                  * drm_atomic_helper_check_planes() after our call to
 563                  * drm_atomic_add_affected_planes(). However, the
 564                  * connector atomic_check is called as part of
 565                  * drm_atomic_helper_check_modeset() that already
 566                  * happens before a call to
 567                  * drm_atomic_helper_check_planes() in
 568                  * drm_atomic_helper_check().
 569                  */
 570                 ret = drm_atomic_add_affected_planes(state, crtc);
 571                 if (ret)
 572                         return ret;
 573         }
 574
 575         if (old_state->colorspace != new_state->colorspace ||
 576             old_vc4_state->broadcast_rgb != new_vc4_state->broadcast_rgb ||
 577             !drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
 578                 struct drm_crtc_state *crtc_state;
 579
 580                 crtc_state = drm_atomic_get_crtc_state(state, crtc);
 581                 if (IS_ERR(crtc_state))
 582                         return PTR_ERR(crtc_state);
 583
 584                 crtc_state->mode_changed = true;
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int vc4_hdmi_connector_get_property(struct drm_connector *connector,
 591                                            const struct drm_connector_state *state,
 592                                            struct drm_property *property,
 593                                            uint64_t *val)
 594 {
 595         struct drm_device *drm = connector->dev;
 596         struct vc4_hdmi *vc4_hdmi =
 597                 connector_to_vc4_hdmi(connector);
 598         const struct vc4_hdmi_connector_state *vc4_conn_state =
 599                 conn_state_to_vc4_hdmi_conn_state(state);
 600
 601         if (property == vc4_hdmi->broadcast_rgb_property) {
 602                 *val = vc4_conn_state->broadcast_rgb;
 603         } else {
 604                 drm_dbg(drm, "Unknown property [PROP:%d:%s]\n",
 605                         property->base.id, property->name);
 606                 return -EINVAL;
 607         }
 608
 609         return 0;
 610 }
 611
 612 static int vc4_hdmi_connector_set_property(struct drm_connector *connector,
 613                                            struct drm_connector_state *state,
 614                                            struct drm_property *property,
 615                                            uint64_t val)
 616 {
 617         struct drm_device *drm = connector->dev;
 618         struct vc4_hdmi *vc4_hdmi =
 619                 connector_to_vc4_hdmi(connector);
 620         struct vc4_hdmi_connector_state *vc4_conn_state =
 621                 conn_state_to_vc4_hdmi_conn_state(state);
 622
 623         if (property == vc4_hdmi->broadcast_rgb_property) {
 624                 vc4_conn_state->broadcast_rgb = val;
 625                 return 0;
 626         }
 627
 628         drm_dbg(drm, "Unknown property [PROP:%d:%s]\n",
 629                 property->base.id, property->name);
 630         return -EINVAL;
 631 }
 632
 633 static void vc4_hdmi_connector_reset(struct drm_connector *connector)
 634 {
 635         struct vc4_hdmi_connector_state *old_state =
 636                 conn_state_to_vc4_hdmi_conn_state(connector->state);
 637         struct vc4_hdmi_connector_state *new_state =
 638                 kzalloc(sizeof(*new_state), GFP_KERNEL);
 639
 640         if (connector->state)
 641                 __drm_atomic_helper_connector_destroy_state(connector->state);
 642
 643         kfree(old_state);
 644         __drm_atomic_helper_connector_reset(connector, &new_state->base);
 645
 646         if (!new_state)
 647                 return;
 648
 649         new_state->base.max_bpc = 8;
 650         new_state->base.max_requested_bpc = 8;
 651         new_state->output_format = VC4_HDMI_OUTPUT_RGB;
 652         new_state->broadcast_rgb = VC4_HDMI_BROADCAST_RGB_AUTO;
 653         drm_atomic_helper_connector_tv_margins_reset(connector);
 654 }
 655
 656 static struct drm_connector_state *
 657 vc4_hdmi_connector_duplicate_state(struct drm_connector *connector)
 658 {
 659         struct drm_connector_state *conn_state = connector->state;
 660         struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state);
 661         struct vc4_hdmi_connector_state *new_state;
 662
 663         new_state = kzalloc(sizeof(*new_state), GFP_KERNEL);
 664         if (!new_state)
 665                 return NULL;
 666
 667         new_state->tmds_char_rate = vc4_state->tmds_char_rate;
 668         new_state->output_bpc = vc4_state->output_bpc;
 669         new_state->output_format = vc4_state->output_format;
 670         new_state->broadcast_rgb = vc4_state->broadcast_rgb;
 671         __drm_atomic_helper_connector_duplicate_state(connector, &new_state->base);
 672
 673         return &new_state->base;
 674 }
 675
 676 static void vc4_hdmi_connector_destroy_state(struct drm_connector *connector,
 677                                              struct drm_connector_state *state)
 678 {
 679         struct vc4_hdmi_connector_state *vc4_state =
 680                 conn_state_to_vc4_hdmi_conn_state(state);
 681
 682         __drm_atomic_helper_connector_destroy_state(state);
 683         kfree(vc4_state);
 684 }
 685
 686 static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
 687         .fill_modes = drm_helper_probe_single_connector_modes,
 688         .reset = vc4_hdmi_connector_reset,
 689         .atomic_duplicate_state = vc4_hdmi_connector_duplicate_state,
 690         .atomic_destroy_state = vc4_hdmi_connector_destroy_state,
 691         .atomic_get_property = vc4_hdmi_connector_get_property,
 692         .atomic_set_property = vc4_hdmi_connector_set_property,
 693 };
 694
 695 static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs = {
 696         .detect_ctx = vc4_hdmi_connector_detect_ctx,
 697         .get_modes = vc4_hdmi_connector_get_modes,
 698         .atomic_check = vc4_hdmi_connector_atomic_check,
 699 };
 700
 701 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 702         { VC4_HDMI_BROADCAST_RGB_AUTO, "Automatic" },
 703         { VC4_HDMI_BROADCAST_RGB_FULL, "Full" },
 704         { VC4_HDMI_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 705 };
 706
 707 static void
 708 vc4_hdmi_attach_broadcast_rgb_property(struct drm_device *dev,
 709                                        struct vc4_hdmi *vc4_hdmi)
 710 {
 711         struct drm_property *prop = vc4_hdmi->broadcast_rgb_property;
 712
 713         if (!prop) {
 714                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 715                                                 "Broadcast RGB",
 716                                                 broadcast_rgb_names,
 717                                                 ARRAY_SIZE(broadcast_rgb_names));
 718                 if (!prop)
 719                         return;
 720
 721                 vc4_hdmi->broadcast_rgb_property = prop;
 722         }
 723
 724         drm_object_attach_property(&vc4_hdmi->connector.base, prop,
 725                                    VC4_HDMI_BROADCAST_RGB_AUTO);
 726 }
 727
 728 static int vc4_hdmi_connector_init(struct drm_device *dev,
 729                                    struct vc4_hdmi *vc4_hdmi)
 730 {
 731         struct drm_connector *connector = &vc4_hdmi->connector;
 732         struct drm_encoder *encoder = &vc4_hdmi->encoder.base;
 733         int ret;
 734
 735         ret = drmm_connector_init(dev, connector,
 736                                   &vc4_hdmi_connector_funcs,
 737                                   DRM_MODE_CONNECTOR_HDMIA,
 738                                   vc4_hdmi->ddc);
 739         if (ret)
 740                 return ret;
 741
 742         drm_connector_helper_add(connector, &vc4_hdmi_connector_helper_funcs);
 743
 744         /*
 745          * Some of the properties below require access to state, like bpc.
 746          * Allocate some default initial connector state with our reset helper.
 747          */
 748         if (connector->funcs->reset)
 749                 connector->funcs->reset(connector);
 750
 751         /* Create and attach TV margin props to this connector. */
 752         ret = drm_mode_create_tv_margin_properties(dev);
 753         if (ret)
 754                 return ret;
 755
 756         ret = drm_mode_create_hdmi_colorspace_property(connector, 0);
 757         if (ret)
 758                 return ret;
 759
 760         drm_connector_attach_colorspace_property(connector);
 761         drm_connector_attach_tv_margin_properties(connector);
 762         drm_connector_attach_max_bpc_property(connector, 8, 12);
 763
 764         connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
 765                              DRM_CONNECTOR_POLL_DISCONNECT);
 766
 767         connector->interlace_allowed = 1;
 768         connector->doublescan_allowed = 0;
 769         connector->stereo_allowed = 1;
 770
 771         if (vc4_hdmi->variant->supports_hdr)
 772                 drm_connector_attach_hdr_output_metadata_property(connector);
 773
 774         vc4_hdmi_attach_broadcast_rgb_property(dev, vc4_hdmi);
 775
 776         drm_connector_attach_encoder(connector, encoder);
 777
 778         return 0;
 779 }
 780
 781 static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
 782                                 enum hdmi_infoframe_type type,
 783                                 bool poll)
 784 {
 785         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 786         struct drm_device *drm = vc4_hdmi->connector.dev;
 787         u32 packet_id = type - 0x80;
 788         unsigned long flags;
 789         int ret = 0;
 790         int idx;
 791
 792         if (!drm_dev_enter(drm, &idx))
 793                 return -ENODEV;
 794
 795         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 796         HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
 797                    HDMI_READ(HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
 798         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 799
 800         if (poll) {
 801                 ret = wait_for(!(HDMI_READ(HDMI_RAM_PACKET_STATUS) &
 802                                  BIT(packet_id)), 100);
 803         }
 804
 805         drm_dev_exit(idx);
 806         return ret;
 807 }
 808
 809 static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
 810                                      union hdmi_infoframe *frame)
 811 {
 812         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 813         struct drm_device *drm = vc4_hdmi->connector.dev;
 814         u32 packet_id = frame->any.type - 0x80;
 815         const struct vc4_hdmi_register *ram_packet_start =
 816                 &vc4_hdmi->variant->registers[HDMI_RAM_PACKET_START];
 817         u32 packet_reg = ram_packet_start->offset + VC4_HDMI_PACKET_STRIDE * packet_id;
 818         u32 packet_reg_next = ram_packet_start->offset +
 819                 VC4_HDMI_PACKET_STRIDE * (packet_id + 1);
 820         void __iomem *base = __vc4_hdmi_get_field_base(vc4_hdmi,
 821                                                        ram_packet_start->reg);
 822         uint8_t buffer[VC4_HDMI_PACKET_STRIDE] = {};
 823         unsigned long flags;
 824         ssize_t len, i;
 825         int ret;
 826         int idx;
 827
 828         if (!drm_dev_enter(drm, &idx))
 829                 return;
 830
 831         WARN_ONCE(!(HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
 832                     VC4_HDMI_RAM_PACKET_ENABLE),
 833                   "Packet RAM has to be on to store the packet.");
 834
 835         len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
 836         if (len < 0)
 837                 goto out;
 838
 839         ret = vc4_hdmi_stop_packet(encoder, frame->any.type, true);
 840         if (ret) {
 841                 DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
 842                 goto out;
 843         }
 844
 845         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 846
 847         for (i = 0; i < len; i += 7) {
 848                 writel(buffer[i + 0] << 0 |
 849                        buffer[i + 1] << 8 |
 850                        buffer[i + 2] << 16,
 851                        base + packet_reg);
 852                 packet_reg += 4;
 853
 854                 writel(buffer[i + 3] << 0 |
 855                        buffer[i + 4] << 8 |
 856                        buffer[i + 5] << 16 |
 857                        buffer[i + 6] << 24,
 858                        base + packet_reg);
 859                 packet_reg += 4;
 860         }
 861
 862         /*
 863          * clear remainder of packet ram as it's included in the
 864          * infoframe and triggers a checksum error on hdmi analyser
 865          */
 866         for (; packet_reg < packet_reg_next; packet_reg += 4)
 867                 writel(0, base + packet_reg);
 868
 869         HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
 870                    HDMI_READ(HDMI_RAM_PACKET_CONFIG) | BIT(packet_id));
 871
 872         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 873
 874         ret = wait_for((HDMI_READ(HDMI_RAM_PACKET_STATUS) &
 875                         BIT(packet_id)), 100);
 876         if (ret)
 877                 DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
 878
 879 out:
 880         drm_dev_exit(idx);
 881 }
 882
 883 static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
 884                                               enum vc4_hdmi_output_format fmt)
 885 {
 886         switch (fmt) {
 887         case VC4_HDMI_OUTPUT_RGB:
 888                 frame->colorspace = HDMI_COLORSPACE_RGB;
 889                 break;
 890
 891         case VC4_HDMI_OUTPUT_YUV420:
 892                 frame->colorspace = HDMI_COLORSPACE_YUV420;
 893                 break;
 894
 895         case VC4_HDMI_OUTPUT_YUV422:
 896                 frame->colorspace = HDMI_COLORSPACE_YUV422;
 897                 break;
 898
 899         case VC4_HDMI_OUTPUT_YUV444:
 900                 frame->colorspace = HDMI_COLORSPACE_YUV444;
 901                 break;
 902
 903         default:
 904                 break;
 905         }
 906 }
 907
 908 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 909 {
 910         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 911         struct drm_connector *connector = &vc4_hdmi->connector;
 912         struct drm_connector_state *cstate = connector->state;
 913         struct vc4_hdmi_connector_state *vc4_state =
 914                 conn_state_to_vc4_hdmi_conn_state(cstate);
 915         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
 916         union hdmi_infoframe frame;
 917         int ret;
 918
 919         lockdep_assert_held(&vc4_hdmi->mutex);
 920
 921         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
 922                                                        connector, mode);
 923         if (ret < 0) {
 924                 DRM_ERROR("couldn't fill AVI infoframe\n");
 925                 return;
 926         }
 927
 928         drm_hdmi_avi_infoframe_quant_range(&frame.avi,
 929                                            connector, mode,
 930                                            vc4_hdmi_is_full_range(vc4_hdmi, vc4_state) ?
 931                                            HDMI_QUANTIZATION_RANGE_FULL :
 932                                            HDMI_QUANTIZATION_RANGE_LIMITED);
 933         drm_hdmi_avi_infoframe_colorimetry(&frame.avi, cstate);
 934         vc4_hdmi_avi_infoframe_colorspace(&frame.avi, vc4_state->output_format);
 935         drm_hdmi_avi_infoframe_bars(&frame.avi, cstate);
 936
 937         vc4_hdmi_write_infoframe(encoder, &frame);
 938 }
 939
 940 static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
 941 {
 942         union hdmi_infoframe frame;
 943         int ret;
 944
 945         ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore");
 946         if (ret < 0) {
 947                 DRM_ERROR("couldn't fill SPD infoframe\n");
 948                 return;
 949         }
 950
 951         frame.spd.sdi = HDMI_SPD_SDI_PC;
 952
 953         vc4_hdmi_write_infoframe(encoder, &frame);
 954 }
 955
 956 static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
 957 {
 958         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 959         struct hdmi_audio_infoframe *audio = &vc4_hdmi->audio.infoframe;
 960         union hdmi_infoframe frame;
 961
 962         memcpy(&frame.audio, audio, sizeof(*audio));
 963
 964         if (vc4_hdmi->packet_ram_enabled)
 965                 vc4_hdmi_write_infoframe(encoder, &frame);
 966 }
 967
 968 static void vc4_hdmi_set_hdr_infoframe(struct drm_encoder *encoder)
 969 {
 970         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 971         struct drm_connector *connector = &vc4_hdmi->connector;
 972         struct drm_connector_state *conn_state = connector->state;
 973         union hdmi_infoframe frame;
 974
 975         lockdep_assert_held(&vc4_hdmi->mutex);
 976
 977         if (!vc4_hdmi->variant->supports_hdr)
 978                 return;
 979
 980         if (!conn_state->hdr_output_metadata)
 981                 return;
 982
 983         if (drm_hdmi_infoframe_set_hdr_metadata(&frame.drm, conn_state))
 984                 return;
 985
 986         vc4_hdmi_write_infoframe(encoder, &frame);
 987 }
 988
 989 static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
 990 {
 991         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 992
 993         lockdep_assert_held(&vc4_hdmi->mutex);
 994
 995         vc4_hdmi_set_avi_infoframe(encoder);
 996         vc4_hdmi_set_spd_infoframe(encoder);
 997         /*
 998          * If audio was streaming, then we need to reenabled the audio
 999          * infoframe here during encoder_enable.
1000          */
1001         if (vc4_hdmi->audio.streaming)
1002                 vc4_hdmi_set_audio_infoframe(encoder);
1003
1004         vc4_hdmi_set_hdr_infoframe(encoder);
1005 }
1006
1007 #define SCRAMBLING_POLLING_DELAY_MS     1000
1008
1009 static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
1010 {
1011         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1012         struct drm_connector *connector = &vc4_hdmi->connector;
1013         struct drm_device *drm = connector->dev;
1014         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
1015         unsigned long flags;
1016         int idx;
1017
1018         lockdep_assert_held(&vc4_hdmi->mutex);
1019
1020         if (!vc4_hdmi_supports_scrambling(vc4_hdmi))
1021                 return;
1022
1023         if (!vc4_hdmi_mode_needs_scrambling(mode,
1024                                             vc4_hdmi->output_bpc,
1025                                             vc4_hdmi->output_format))
1026                 return;
1027
1028         if (!drm_dev_enter(drm, &idx))
1029                 return;
1030
1031         drm_scdc_set_high_tmds_clock_ratio(connector, true);
1032         drm_scdc_set_scrambling(connector, true);
1033
1034         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1035         HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) |
1036                    VC5_HDMI_SCRAMBLER_CTL_ENABLE);
1037         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1038
1039         drm_dev_exit(idx);
1040
1041         vc4_hdmi->scdc_enabled = true;
1042
1043         queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work,
1044                            msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS));
1045 }
1046
1047 static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
1048 {
1049         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1050         struct drm_connector *connector = &vc4_hdmi->connector;
1051         struct drm_device *drm = connector->dev;
1052         unsigned long flags;
1053         int idx;
1054
1055         lockdep_assert_held(&vc4_hdmi->mutex);
1056
1057         if (!vc4_hdmi->scdc_enabled)
1058                 return;
1059
1060         vc4_hdmi->scdc_enabled = false;
1061
1062         if (delayed_work_pending(&vc4_hdmi->scrambling_work))
1063                 cancel_delayed_work_sync(&vc4_hdmi->scrambling_work);
1064
1065         if (!drm_dev_enter(drm, &idx))
1066                 return;
1067
1068         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1069         HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) &
1070                    ~VC5_HDMI_SCRAMBLER_CTL_ENABLE);
1071         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1072
1073         drm_scdc_set_scrambling(connector, false);
1074         drm_scdc_set_high_tmds_clock_ratio(connector, false);
1075
1076         drm_dev_exit(idx);
1077 }
1078
1079 static void vc4_hdmi_scrambling_wq(struct work_struct *work)
1080 {
1081         struct vc4_hdmi *vc4_hdmi = container_of(to_delayed_work(work),
1082                                                  struct vc4_hdmi,
1083                                                  scrambling_work);
1084         struct drm_connector *connector = &vc4_hdmi->connector;
1085
1086         if (drm_scdc_get_scrambling_status(connector))
1087                 return;
1088
1089         drm_scdc_set_high_tmds_clock_ratio(connector, true);
1090         drm_scdc_set_scrambling(connector, true);
1091
1092         queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work,
1093                            msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS));
1094 }
1095
1096 static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
1097                                                struct drm_atomic_state *state)
1098 {
1099         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1100         struct drm_device *drm = vc4_hdmi->connector.dev;
1101         unsigned long flags;
1102         int idx;
1103
1104         mutex_lock(&vc4_hdmi->mutex);
1105
1106         vc4_hdmi->packet_ram_enabled = false;
1107
1108         if (!drm_dev_enter(drm, &idx))
1109                 goto out;
1110
1111         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1112
1113         HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 0);
1114
1115         HDMI_WRITE(HDMI_VID_CTL, HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_CLRRGB);
1116
1117         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1118
1119         mdelay(1);
1120
1121         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1122         HDMI_WRITE(HDMI_VID_CTL,
1123                    HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
1124         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1125
1126         vc4_hdmi_disable_scrambling(encoder);
1127
1128         drm_dev_exit(idx);
1129
1130 out:
1131         mutex_unlock(&vc4_hdmi->mutex);
1132 }
1133
1134 static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder,
1135                                                  struct drm_atomic_state *state)
1136 {
1137         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1138         struct drm_device *drm = vc4_hdmi->connector.dev;
1139         unsigned long flags;
1140         int ret;
1141         int idx;
1142
1143         mutex_lock(&vc4_hdmi->mutex);
1144
1145         if (!drm_dev_enter(drm, &idx))
1146                 goto out;
1147
1148         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1149         HDMI_WRITE(HDMI_VID_CTL,
1150                    HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_BLANKPIX);
1151         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1152
1153         if (vc4_hdmi->variant->phy_disable)
1154                 vc4_hdmi->variant->phy_disable(vc4_hdmi);
1155
1156         clk_disable_unprepare(vc4_hdmi->pixel_bvb_clock);
1157         clk_disable_unprepare(vc4_hdmi->pixel_clock);
1158
1159         ret = pm_runtime_put(&vc4_hdmi->pdev->dev);
1160         if (ret < 0)
1161                 DRM_ERROR("Failed to release power domain: %d\n", ret);
1162
1163         drm_dev_exit(idx);
1164
1165 out:
1166         mutex_unlock(&vc4_hdmi->mutex);
1167 }
1168
1169 static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
1170                                struct drm_connector_state *state,
1171                                const struct drm_display_mode *mode)
1172 {
1173         struct vc4_hdmi_connector_state *vc4_state =
1174                 conn_state_to_vc4_hdmi_conn_state(state);
1175         struct drm_device *drm = vc4_hdmi->connector.dev;
1176         unsigned long flags;
1177         u32 csc_ctl;
1178         int idx;
1179
1180         if (!drm_dev_enter(drm, &idx))
1181                 return;
1182
1183         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1184
1185         csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
1186                                 VC4_HD_CSC_CTL_ORDER);
1187
1188         if (!vc4_hdmi_is_full_range(vc4_hdmi, vc4_state)) {
1189                 /* CEA VICs other than #1 requre limited range RGB
1190                  * output unless overridden by an AVI infoframe.
1191                  * Apply a colorspace conversion to squash 0-255 down
1192                  * to 16-235.  The matrix here is:
1193                  *
1194                  * [ 0      0      0.8594 16]
1195                  * [ 0      0.8594 0      16]
1196                  * [ 0.8594 0      0      16]
1197                  * [ 0      0      0       1]
1198                  */
1199                 csc_ctl |= VC4_HD_CSC_CTL_ENABLE;
1200                 csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC;
1201                 csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
1202                                          VC4_HD_CSC_CTL_MODE);
1203
1204                 HDMI_WRITE(HDMI_CSC_12_11, (0x000 << 16) | 0x000);
1205                 HDMI_WRITE(HDMI_CSC_14_13, (0x100 << 16) | 0x6e0);
1206                 HDMI_WRITE(HDMI_CSC_22_21, (0x6e0 << 16) | 0x000);
1207                 HDMI_WRITE(HDMI_CSC_24_23, (0x100 << 16) | 0x000);
1208                 HDMI_WRITE(HDMI_CSC_32_31, (0x000 << 16) | 0x6e0);
1209                 HDMI_WRITE(HDMI_CSC_34_33, (0x100 << 16) | 0x000);
1210         }
1211
1212         /* The RGB order applies even when CSC is disabled. */
1213         HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
1214
1215         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1216
1217         drm_dev_exit(idx);
1218 }
1219
1220 /*
1221  * Matrices for (internal) RGB to RGB output.
1222  *
1223  * Matrices are signed 2p13 fixed point, with signed 9p6 offsets
1224  */
1225 static const u16 vc5_hdmi_csc_full_rgb_to_rgb[2][3][4] = {
1226         {
1227                 /*
1228                  * Full range - unity
1229                  *
1230                  * [ 1      0      0      0]
1231                  * [ 0      1      0      0]
1232                  * [ 0      0      1      0]
1233                  */
1234                 { 0x2000, 0x0000, 0x0000, 0x0000 },
1235                 { 0x0000, 0x2000, 0x0000, 0x0000 },
1236                 { 0x0000, 0x0000, 0x2000, 0x0000 },
1237         },
1238         {
1239                 /*
1240                  * Limited range
1241                  *
1242                  * CEA VICs other than #1 require limited range RGB
1243                  * output unless overridden by an AVI infoframe. Apply a
1244                  * colorspace conversion to squash 0-255 down to 16-235.
1245                  * The matrix here is:
1246                  *
1247                  * [ 0.8594 0      0      16]
1248                  * [ 0      0.8594 0      16]
1249                  * [ 0      0      0.8594 16]
1250                  */
1251                 { 0x1b80, 0x0000, 0x0000, 0x0400 },
1252                 { 0x0000, 0x1b80, 0x0000, 0x0400 },
1253                 { 0x0000, 0x0000, 0x1b80, 0x0400 },
1254         },
1255 };
1256
1257 /*
1258  * Conversion between Full Range RGB and YUV using the BT.601 Colorspace
1259  *
1260  * Matrices are signed 2p13 fixed point, with signed 9p6 offsets
1261  */
1262 static const u16 vc5_hdmi_csc_full_rgb_to_yuv_bt601[2][3][4] = {
1263         {
1264                 /*
1265                  * Full Range
1266                  *
1267                  * [  0.299000  0.587000  0.114000  0   ]
1268                  * [ -0.168736 -0.331264  0.500000  128 ]
1269                  * [  0.500000 -0.418688 -0.081312  128 ]
1270                  */
1271                 { 0x0991, 0x12c9, 0x03a6, 0x0000 },
1272                 { 0xfa9b, 0xf567, 0x1000, 0x2000 },
1273                 { 0x1000, 0xf29b, 0xfd67, 0x2000 },
1274         },
1275         {
1276                 /* Limited Range
1277                  *
1278                  * [  0.255785  0.502160  0.097523  16  ]
1279                  * [ -0.147644 -0.289856  0.437500  128 ]
1280                  * [  0.437500 -0.366352 -0.071148  128 ]
1281                  */
1282                 { 0x082f, 0x1012, 0x031f, 0x0400 },
1283                 { 0xfb48, 0xf6ba, 0x0e00, 0x2000 },
1284                 { 0x0e00, 0xf448, 0xfdba, 0x2000 },
1285         },
1286 };
1287
1288 /*
1289  * Conversion between Full Range RGB and YUV using the BT.709 Colorspace
1290  *
1291  * Matrices are signed 2p13 fixed point, with signed 9p6 offsets
1292  */
1293 static const u16 vc5_hdmi_csc_full_rgb_to_yuv_bt709[2][3][4] = {
1294         {
1295                 /*
1296                  * Full Range
1297                  *
1298                  * [  0.212600  0.715200  0.072200  0   ]
1299                  * [ -0.114572 -0.385428  0.500000  128 ]
1300                  * [  0.500000 -0.454153 -0.045847  128 ]
1301                  */
1302                 { 0x06ce, 0x16e3, 0x024f, 0x0000 },
1303                 { 0xfc56, 0xf3ac, 0x1000, 0x2000 },
1304                 { 0x1000, 0xf179, 0xfe89, 0x2000 },
1305         },
1306         {
1307                 /*
1308                  * Limited Range
1309                  *
1310                  * [  0.181906  0.611804  0.061758  16  ]
1311                  * [ -0.100268 -0.337232  0.437500  128 ]
1312                  * [  0.437500 -0.397386 -0.040114  128 ]
1313                  */
1314                 { 0x05d2, 0x1394, 0x01fa, 0x0400 },
1315                 { 0xfccc, 0xf536, 0x0e00, 0x2000 },
1316                 { 0x0e00, 0xf34a, 0xfeb8, 0x2000 },
1317         },
1318 };
1319
1320 /*
1321  * Conversion between Full Range RGB and YUV using the BT.2020 Colorspace
1322  *
1323  * Matrices are signed 2p13 fixed point, with signed 9p6 offsets
1324  */
1325 static const u16 vc5_hdmi_csc_full_rgb_to_yuv_bt2020[2][3][4] = {
1326         {
1327                 /*
1328                  * Full Range
1329                  *
1330                  * [  0.262700  0.678000  0.059300  0   ]
1331                  * [ -0.139630 -0.360370  0.500000  128 ]
1332                  * [  0.500000 -0.459786 -0.040214  128 ]
1333                  */
1334                 { 0x0868, 0x15b2, 0x01e6, 0x0000 },
1335                 { 0xfb89, 0xf479, 0x1000, 0x2000 },
1336                 { 0x1000, 0xf14a, 0xfeb8, 0x2000 },
1337         },
1338         {
1339                 /* Limited Range
1340                  *
1341                  * [  0.224732  0.580008  0.050729  16  ]
1342                  * [ -0.122176 -0.315324  0.437500  128 ]
1343                  * [  0.437500 -0.402312 -0.035188  128 ]
1344                  */
1345                 { 0x082f, 0x1012, 0x031f, 0x0400 },
1346                 { 0xfb48, 0xf6ba, 0x0e00, 0x2000 },
1347                 { 0x0e00, 0xf448, 0xfdba, 0x2000 },
1348         },
1349 };
1350
1351 static void vc5_hdmi_set_csc_coeffs(struct vc4_hdmi *vc4_hdmi,
1352                                     const u16 coeffs[3][4])
1353 {
1354         lockdep_assert_held(&vc4_hdmi->hw_lock);
1355
1356         HDMI_WRITE(HDMI_CSC_12_11, (coeffs[0][1] << 16) | coeffs[0][0]);
1357         HDMI_WRITE(HDMI_CSC_14_13, (coeffs[0][3] << 16) | coeffs[0][2]);
1358         HDMI_WRITE(HDMI_CSC_22_21, (coeffs[1][1] << 16) | coeffs[1][0]);
1359         HDMI_WRITE(HDMI_CSC_24_23, (coeffs[1][3] << 16) | coeffs[1][2]);
1360         HDMI_WRITE(HDMI_CSC_32_31, (coeffs[2][1] << 16) | coeffs[2][0]);
1361         HDMI_WRITE(HDMI_CSC_34_33, (coeffs[2][3] << 16) | coeffs[2][2]);
1362 }
1363
1364 static void vc5_hdmi_set_csc_coeffs_swap(struct vc4_hdmi *vc4_hdmi,
1365                                          const u16 coeffs[3][4])
1366 {
1367         lockdep_assert_held(&vc4_hdmi->hw_lock);
1368
1369         /* YUV444 needs the CSC matrices using the channels in a different order */
1370         HDMI_WRITE(HDMI_CSC_12_11, (coeffs[1][1] << 16) | coeffs[1][0]);
1371         HDMI_WRITE(HDMI_CSC_14_13, (coeffs[1][3] << 16) | coeffs[1][2]);
1372         HDMI_WRITE(HDMI_CSC_22_21, (coeffs[2][1] << 16) | coeffs[2][0]);
1373         HDMI_WRITE(HDMI_CSC_24_23, (coeffs[2][3] << 16) | coeffs[2][2]);
1374         HDMI_WRITE(HDMI_CSC_32_31, (coeffs[0][1] << 16) | coeffs[0][0]);
1375         HDMI_WRITE(HDMI_CSC_34_33, (coeffs[0][3] << 16) | coeffs[0][2]);
1376 }
1377
1378 static const u16
1379 (*vc5_hdmi_find_yuv_csc_coeffs(struct vc4_hdmi *vc4_hdmi, u32 colorspace, bool limited))[4]
1380 {
1381         switch (colorspace) {
1382         case DRM_MODE_COLORIMETRY_SMPTE_170M_YCC:
1383         case DRM_MODE_COLORIMETRY_XVYCC_601:
1384         case DRM_MODE_COLORIMETRY_SYCC_601:
1385         case DRM_MODE_COLORIMETRY_OPYCC_601:
1386         case DRM_MODE_COLORIMETRY_BT601_YCC:
1387                 return vc5_hdmi_csc_full_rgb_to_yuv_bt601[limited];
1388
1389         default:
1390         case DRM_MODE_COLORIMETRY_NO_DATA:
1391         case DRM_MODE_COLORIMETRY_BT709_YCC:
1392         case DRM_MODE_COLORIMETRY_XVYCC_709:
1393         case DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED:
1394         case DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT:
1395                 return vc5_hdmi_csc_full_rgb_to_yuv_bt709[limited];
1396
1397         case DRM_MODE_COLORIMETRY_BT2020_CYCC:
1398         case DRM_MODE_COLORIMETRY_BT2020_YCC:
1399         case DRM_MODE_COLORIMETRY_BT2020_RGB:
1400         case DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65:
1401         case DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER:
1402                 return vc5_hdmi_csc_full_rgb_to_yuv_bt2020[limited];
1403         }
1404 }
1405
1406 static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
1407                                struct drm_connector_state *state,
1408                                const struct drm_display_mode *mode)
1409 {
1410         struct drm_device *drm = vc4_hdmi->connector.dev;
1411         struct vc4_hdmi_connector_state *vc4_state =
1412                 conn_state_to_vc4_hdmi_conn_state(state);
1413         unsigned int lim_range = vc4_hdmi_is_full_range(vc4_hdmi, vc4_state) ? 0 : 1;
1414         unsigned long flags;
1415         const u16 (*csc)[4];
1416         u32 if_cfg = 0;
1417         u32 if_xbar = 0x543210;
1418         u32 csc_chan_ctl = 0;
1419         u32 csc_ctl = VC5_MT_CP_CSC_CTL_ENABLE | VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
1420                                                                VC5_MT_CP_CSC_CTL_MODE);
1421         int idx;
1422
1423         if (!drm_dev_enter(drm, &idx))
1424                 return;
1425
1426         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1427
1428         switch (vc4_state->output_format) {
1429         case VC4_HDMI_OUTPUT_YUV444:
1430                 csc = vc5_hdmi_find_yuv_csc_coeffs(vc4_hdmi, state->colorspace, !!lim_range);
1431
1432                 vc5_hdmi_set_csc_coeffs_swap(vc4_hdmi, csc);
1433                 break;
1434
1435         case VC4_HDMI_OUTPUT_YUV422:
1436                 csc = vc5_hdmi_find_yuv_csc_coeffs(vc4_hdmi, state->colorspace, !!lim_range);
1437
1438                 csc_ctl |= VC4_SET_FIELD(VC5_MT_CP_CSC_CTL_FILTER_MODE_444_TO_422_STANDARD,
1439                                          VC5_MT_CP_CSC_CTL_FILTER_MODE_444_TO_422) |
1440                         VC5_MT_CP_CSC_CTL_USE_444_TO_422 |
1441                         VC5_MT_CP_CSC_CTL_USE_RNG_SUPPRESSION;
1442
1443                 csc_chan_ctl |= VC4_SET_FIELD(VC5_MT_CP_CHANNEL_CTL_OUTPUT_REMAP_LEGACY_STYLE,
1444                                               VC5_MT_CP_CHANNEL_CTL_OUTPUT_REMAP);
1445
1446                 if_cfg |= VC4_SET_FIELD(VC5_DVP_HT_VEC_INTERFACE_CFG_SEL_422_FORMAT_422_LEGACY,
1447                                         VC5_DVP_HT_VEC_INTERFACE_CFG_SEL_422);
1448
1449                 vc5_hdmi_set_csc_coeffs(vc4_hdmi, csc);
1450                 break;
1451
1452         case VC4_HDMI_OUTPUT_RGB:
1453                 if_xbar = 0x354021;
1454
1455                 vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_rgb[lim_range]);
1456                 break;
1457
1458         default:
1459                 break;
1460         }
1461
1462         HDMI_WRITE(HDMI_VEC_INTERFACE_CFG, if_cfg);
1463         HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, if_xbar);
1464         HDMI_WRITE(HDMI_CSC_CHANNEL_CTL, csc_chan_ctl);
1465         HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
1466
1467         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1468
1469         drm_dev_exit(idx);
1470 }
1471
1472 static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
1473                                  struct drm_connector_state *state,
1474                                  const struct drm_display_mode *mode)
1475 {
1476         struct drm_device *drm = vc4_hdmi->connector.dev;
1477         bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
1478         bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
1479         bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
1480         u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1;
1481         u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start,
1482                                    VC4_HDMI_VERTA_VSP) |
1483                      VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay,
1484                                    VC4_HDMI_VERTA_VFP) |
1485                      VC4_SET_FIELD(mode->crtc_vdisplay, VC4_HDMI_VERTA_VAL));
1486         u32 vertb = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
1487                      VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end +
1488                                    interlaced,
1489                                    VC4_HDMI_VERTB_VBP));
1490         u32 vertb_even = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
1491                           VC4_SET_FIELD(mode->crtc_vtotal -
1492                                         mode->crtc_vsync_end,
1493                                         VC4_HDMI_VERTB_VBP));
1494         unsigned long flags;
1495         u32 reg;
1496         int idx;
1497
1498         if (!drm_dev_enter(drm, &idx))
1499                 return;
1500
1501         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1502
1503         HDMI_WRITE(HDMI_HORZA,
1504                    (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
1505                    (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
1506                    VC4_SET_FIELD(mode->hdisplay * pixel_rep,
1507                                  VC4_HDMI_HORZA_HAP));
1508
1509         HDMI_WRITE(HDMI_HORZB,
1510                    VC4_SET_FIELD((mode->htotal -
1511                                   mode->hsync_end) * pixel_rep,
1512                                  VC4_HDMI_HORZB_HBP) |
1513                    VC4_SET_FIELD((mode->hsync_end -
1514                                   mode->hsync_start) * pixel_rep,
1515                                  VC4_HDMI_HORZB_HSP) |
1516                    VC4_SET_FIELD((mode->hsync_start -
1517                                   mode->hdisplay) * pixel_rep,
1518                                  VC4_HDMI_HORZB_HFP));
1519
1520         HDMI_WRITE(HDMI_VERTA0, verta);
1521         HDMI_WRITE(HDMI_VERTA1, verta);
1522
1523         HDMI_WRITE(HDMI_VERTB0, vertb_even);
1524         HDMI_WRITE(HDMI_VERTB1, vertb);
1525
1526         reg = HDMI_READ(HDMI_MISC_CONTROL);
1527         reg &= ~VC4_HDMI_MISC_CONTROL_PIXEL_REP_MASK;
1528         reg |= VC4_SET_FIELD(pixel_rep - 1, VC4_HDMI_MISC_CONTROL_PIXEL_REP);
1529         HDMI_WRITE(HDMI_MISC_CONTROL, reg);
1530
1531         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1532
1533         drm_dev_exit(idx);
1534 }
1535
1536 static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
1537                                  struct drm_connector_state *state,
1538                                  const struct drm_display_mode *mode)
1539 {
1540         struct drm_device *drm = vc4_hdmi->connector.dev;
1541         const struct vc4_hdmi_connector_state *vc4_state =
1542                 conn_state_to_vc4_hdmi_conn_state(state);
1543         bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
1544         bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
1545         bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
1546         u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1;
1547         u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start,
1548                                    VC5_HDMI_VERTA_VSP) |
1549                      VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay,
1550                                    VC5_HDMI_VERTA_VFP) |
1551                      VC4_SET_FIELD(mode->crtc_vdisplay, VC5_HDMI_VERTA_VAL));
1552         u32 vertb = (VC4_SET_FIELD(mode->htotal >> (2 - pixel_rep),
1553                                    VC5_HDMI_VERTB_VSPO) |
1554                      VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end +
1555                                    interlaced,
1556                                    VC4_HDMI_VERTB_VBP));
1557         u32 vertb_even = (VC4_SET_FIELD(0, VC5_HDMI_VERTB_VSPO) |
1558                           VC4_SET_FIELD(mode->crtc_vtotal -
1559                                         mode->crtc_vsync_end,
1560                                         VC4_HDMI_VERTB_VBP));
1561         unsigned long flags;
1562         unsigned char gcp;
1563         u32 reg;
1564         int idx;
1565
1566         if (!drm_dev_enter(drm, &idx))
1567                 return;
1568
1569         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1570
1571         HDMI_WRITE(HDMI_HORZA,
1572                    (vsync_pos ? VC5_HDMI_HORZA_VPOS : 0) |
1573                    (hsync_pos ? VC5_HDMI_HORZA_HPOS : 0) |
1574                    VC4_SET_FIELD(mode->hdisplay * pixel_rep,
1575                                  VC5_HDMI_HORZA_HAP) |
1576                    VC4_SET_FIELD((mode->hsync_start -
1577                                   mode->hdisplay) * pixel_rep,
1578                                  VC5_HDMI_HORZA_HFP));
1579
1580         HDMI_WRITE(HDMI_HORZB,
1581                    VC4_SET_FIELD((mode->htotal -
1582                                   mode->hsync_end) * pixel_rep,
1583                                  VC5_HDMI_HORZB_HBP) |
1584                    VC4_SET_FIELD((mode->hsync_end -
1585                                   mode->hsync_start) * pixel_rep,
1586                                  VC5_HDMI_HORZB_HSP));
1587
1588         HDMI_WRITE(HDMI_VERTA0, verta);
1589         HDMI_WRITE(HDMI_VERTA1, verta);
1590
1591         HDMI_WRITE(HDMI_VERTB0, vertb_even);
1592         HDMI_WRITE(HDMI_VERTB1, vertb);
1593
1594         switch (vc4_state->output_bpc) {
1595         case 12:
1596                 gcp = 6;
1597                 break;
1598         case 10:
1599                 gcp = 5;
1600                 break;
1601         case 8:
1602         default:
1603                 gcp = 0;
1604                 break;
1605         }
1606
1607         /*
1608          * YCC422 is always 36-bit and not considered deep colour so
1609          * doesn't signal in GCP.
1610          */
1611         if (vc4_state->output_format == VC4_HDMI_OUTPUT_YUV422) {
1612                 gcp = 0;
1613         }
1614
1615         reg = HDMI_READ(HDMI_DEEP_COLOR_CONFIG_1);
1616         reg &= ~(VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK |
1617                  VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_MASK);
1618         reg |= VC4_SET_FIELD(2, VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE) |
1619                VC4_SET_FIELD(gcp, VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH);
1620         HDMI_WRITE(HDMI_DEEP_COLOR_CONFIG_1, reg);
1621
1622         reg = HDMI_READ(HDMI_GCP_WORD_1);
1623         reg &= ~VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_MASK;
1624         reg |= VC4_SET_FIELD(gcp, VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1);
1625         reg &= ~VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_0_MASK;
1626         reg |= VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_0_CLEAR_AVMUTE;
1627         HDMI_WRITE(HDMI_GCP_WORD_1, reg);
1628
1629         reg = HDMI_READ(HDMI_GCP_CONFIG);
1630         reg |= VC5_HDMI_GCP_CONFIG_GCP_ENABLE;
1631         HDMI_WRITE(HDMI_GCP_CONFIG, reg);
1632
1633         reg = HDMI_READ(HDMI_MISC_CONTROL);
1634         reg &= ~VC5_HDMI_MISC_CONTROL_PIXEL_REP_MASK;
1635         reg |= VC4_SET_FIELD(pixel_rep - 1, VC5_HDMI_MISC_CONTROL_PIXEL_REP);
1636         HDMI_WRITE(HDMI_MISC_CONTROL, reg);
1637
1638         HDMI_WRITE(HDMI_CLOCK_STOP, 0);
1639
1640         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1641
1642         drm_dev_exit(idx);
1643 }
1644
1645 static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi)
1646 {
1647         struct drm_device *drm = vc4_hdmi->connector.dev;
1648         unsigned long flags;
1649         u32 drift;
1650         int ret;
1651         int idx;
1652
1653         if (!drm_dev_enter(drm, &idx))
1654                 return;
1655
1656         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1657
1658         drift = HDMI_READ(HDMI_FIFO_CTL);
1659         drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
1660
1661         HDMI_WRITE(HDMI_FIFO_CTL,
1662                    drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
1663         HDMI_WRITE(HDMI_FIFO_CTL,
1664                    drift | VC4_HDMI_FIFO_CTL_RECENTER);
1665
1666         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1667
1668         usleep_range(1000, 1100);
1669
1670         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1671
1672         HDMI_WRITE(HDMI_FIFO_CTL,
1673                    drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
1674         HDMI_WRITE(HDMI_FIFO_CTL,
1675                    drift | VC4_HDMI_FIFO_CTL_RECENTER);
1676
1677         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1678
1679         ret = wait_for(HDMI_READ(HDMI_FIFO_CTL) &
1680                        VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1);
1681         WARN_ONCE(ret, "Timeout waiting for "
1682                   "VC4_HDMI_FIFO_CTL_RECENTER_DONE");
1683
1684         drm_dev_exit(idx);
1685 }
1686
1687 static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
1688                                                 struct drm_atomic_state *state)
1689 {
1690         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1691         struct drm_device *drm = vc4_hdmi->connector.dev;
1692         struct drm_connector *connector = &vc4_hdmi->connector;
1693         struct drm_connector_state *conn_state =
1694                 drm_atomic_get_new_connector_state(state, connector);
1695         struct vc4_hdmi_connector_state *vc4_conn_state =
1696                 conn_state_to_vc4_hdmi_conn_state(conn_state);
1697         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
1698         unsigned long tmds_char_rate = vc4_conn_state->tmds_char_rate;
1699         unsigned long bvb_rate, hsm_rate;
1700         unsigned long flags;
1701         int ret;
1702         int idx;
1703
1704         mutex_lock(&vc4_hdmi->mutex);
1705
1706         if (!drm_dev_enter(drm, &idx))
1707                 goto out;
1708
1709         ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
1710         if (ret < 0) {
1711                 DRM_ERROR("Failed to retain power domain: %d\n", ret);
1712                 goto err_dev_exit;
1713         }
1714
1715         /*
1716          * As stated in RPi's vc4 firmware "HDMI state machine (HSM) clock must
1717          * be faster than pixel clock, infinitesimally faster, tested in
1718          * simulation. Otherwise, exact value is unimportant for HDMI
1719          * operation." This conflicts with bcm2835's vc4 documentation, which
1720          * states HSM's clock has to be at least 108% of the pixel clock.
1721          *
1722          * Real life tests reveal that vc4's firmware statement holds up, and
1723          * users are able to use pixel clocks closer to HSM's, namely for
1724          * 1920x1200@60Hz. So it was decided to have leave a 1% margin between
1725          * both clocks. Which, for RPi0-3 implies a maximum pixel clock of
1726          * 162MHz.
1727          *
1728          * Additionally, the AXI clock needs to be at least 25% of
1729          * pixel clock, but HSM ends up being the limiting factor.
1730          */
1731         hsm_rate = max_t(unsigned long,
1732                          HSM_MIN_CLOCK_FREQ,
1733                          (tmds_char_rate / 100) * 101);
1734         ret = clk_set_min_rate(vc4_hdmi->hsm_clock, hsm_rate);
1735         if (ret) {
1736                 DRM_ERROR("Failed to set HSM clock rate: %d\n", ret);
1737                 goto err_put_runtime_pm;
1738         }
1739
1740         ret = clk_set_rate(vc4_hdmi->pixel_clock, tmds_char_rate);
1741         if (ret) {
1742                 DRM_ERROR("Failed to set pixel clock rate: %d\n", ret);
1743                 goto err_put_runtime_pm;
1744         }
1745
1746         ret = clk_prepare_enable(vc4_hdmi->pixel_clock);
1747         if (ret) {
1748                 DRM_ERROR("Failed to turn on pixel clock: %d\n", ret);
1749                 goto err_put_runtime_pm;
1750         }
1751
1752
1753         vc4_hdmi_cec_update_clk_div(vc4_hdmi);
1754
1755         if (tmds_char_rate > 297000000)
1756                 bvb_rate = 300000000;
1757         else if (tmds_char_rate > 148500000)
1758                 bvb_rate = 150000000;
1759         else
1760                 bvb_rate = 75000000;
1761
1762         ret = clk_set_min_rate(vc4_hdmi->pixel_bvb_clock, bvb_rate);
1763         if (ret) {
1764                 DRM_ERROR("Failed to set pixel bvb clock rate: %d\n", ret);
1765                 goto err_disable_pixel_clock;
1766         }
1767
1768         ret = clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
1769         if (ret) {
1770                 DRM_ERROR("Failed to turn on pixel bvb clock: %d\n", ret);
1771                 goto err_disable_pixel_clock;
1772         }
1773
1774         if (vc4_hdmi->variant->phy_init)
1775                 vc4_hdmi->variant->phy_init(vc4_hdmi, vc4_conn_state);
1776
1777         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1778
1779         HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
1780                    HDMI_READ(HDMI_SCHEDULER_CONTROL) |
1781                    VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT |
1782                    VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS);
1783
1784         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1785
1786         if (vc4_hdmi->variant->set_timings)
1787                 vc4_hdmi->variant->set_timings(vc4_hdmi, conn_state, mode);
1788
1789         drm_dev_exit(idx);
1790
1791         mutex_unlock(&vc4_hdmi->mutex);
1792
1793         return;
1794
1795 err_disable_pixel_clock:
1796         clk_disable_unprepare(vc4_hdmi->pixel_clock);
1797 err_put_runtime_pm:
1798         pm_runtime_put(&vc4_hdmi->pdev->dev);
1799 err_dev_exit:
1800         drm_dev_exit(idx);
1801 out:
1802         mutex_unlock(&vc4_hdmi->mutex);
1803         return;
1804 }
1805
1806 static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
1807                                              struct drm_atomic_state *state)
1808 {
1809         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1810         struct drm_device *drm = vc4_hdmi->connector.dev;
1811         struct drm_connector *connector = &vc4_hdmi->connector;
1812         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
1813         struct drm_connector_state *conn_state =
1814                 drm_atomic_get_new_connector_state(state, connector);
1815         unsigned long flags;
1816         int idx;
1817
1818         mutex_lock(&vc4_hdmi->mutex);
1819
1820         if (!drm_dev_enter(drm, &idx))
1821                 goto out;
1822
1823         if (vc4_hdmi->variant->csc_setup)
1824                 vc4_hdmi->variant->csc_setup(vc4_hdmi, conn_state, mode);
1825
1826         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1827         HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
1828         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1829
1830         drm_dev_exit(idx);
1831
1832 out:
1833         mutex_unlock(&vc4_hdmi->mutex);
1834 }
1835
1836 static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
1837                                               struct drm_atomic_state *state)
1838 {
1839         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1840         struct drm_device *drm = vc4_hdmi->connector.dev;
1841         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
1842         struct drm_display_info *display = &vc4_hdmi->connector.display_info;
1843         bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
1844         bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
1845         unsigned long flags;
1846         int ret;
1847         int idx;
1848
1849         mutex_lock(&vc4_hdmi->mutex);
1850
1851         if (!drm_dev_enter(drm, &idx))
1852                 goto out;
1853
1854         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1855
1856         HDMI_WRITE(HDMI_VID_CTL,
1857                    VC4_HD_VID_CTL_ENABLE |
1858                    VC4_HD_VID_CTL_CLRRGB |
1859                    VC4_HD_VID_CTL_UNDERFLOW_ENABLE |
1860                    VC4_HD_VID_CTL_FRAME_COUNTER_RESET |
1861                    (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
1862                    (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
1863
1864         HDMI_WRITE(HDMI_VID_CTL,
1865                    HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_BLANKPIX);
1866
1867         if (display->is_hdmi) {
1868                 HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
1869                            HDMI_READ(HDMI_SCHEDULER_CONTROL) |
1870                            VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
1871
1872                 spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1873
1874                 ret = wait_for(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1875                                VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE, 1000);
1876                 WARN_ONCE(ret, "Timeout waiting for "
1877                           "VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
1878         } else {
1879                 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
1880                            HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
1881                            ~(VC4_HDMI_RAM_PACKET_ENABLE));
1882                 HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
1883                            HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1884                            ~VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
1885
1886                 spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1887
1888                 ret = wait_for(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1889                                  VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE), 1000);
1890                 WARN_ONCE(ret, "Timeout waiting for "
1891                           "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
1892         }
1893
1894         if (display->is_hdmi) {
1895                 spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
1896
1897                 WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1898                           VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE));
1899
1900                 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
1901                            VC4_HDMI_RAM_PACKET_ENABLE);
1902
1903                 spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
1904                 vc4_hdmi->packet_ram_enabled = true;
1905
1906                 vc4_hdmi_set_infoframes(encoder);
1907         }
1908
1909         vc4_hdmi_recenter_fifo(vc4_hdmi);
1910         vc4_hdmi_enable_scrambling(encoder);
1911
1912         drm_dev_exit(idx);
1913
1914 out:
1915         mutex_unlock(&vc4_hdmi->mutex);
1916 }
1917
1918 static void vc4_hdmi_encoder_atomic_mode_set(struct drm_encoder *encoder,
1919                                              struct drm_crtc_state *crtc_state,
1920                                              struct drm_connector_state *conn_state)
1921 {
1922         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1923         struct vc4_hdmi_connector_state *vc4_state =
1924                 conn_state_to_vc4_hdmi_conn_state(conn_state);
1925
1926         mutex_lock(&vc4_hdmi->mutex);
1927         drm_mode_copy(&vc4_hdmi->saved_adjusted_mode,
1928                       &crtc_state->adjusted_mode);
1929         vc4_hdmi->output_bpc = vc4_state->output_bpc;
1930         vc4_hdmi->output_format = vc4_state->output_format;
1931         mutex_unlock(&vc4_hdmi->mutex);
1932 }
1933
1934 static bool
1935 vc4_hdmi_sink_supports_format_bpc(const struct vc4_hdmi *vc4_hdmi,
1936                                   const struct drm_display_info *info,
1937                                   const struct drm_display_mode *mode,
1938                                   unsigned int format, unsigned int bpc)
1939 {
1940         struct drm_device *dev = vc4_hdmi->connector.dev;
1941         u8 vic = drm_match_cea_mode(mode);
1942
1943         if (vic == 1 && bpc != 8) {
1944                 drm_dbg(dev, "VIC1 requires a bpc of 8, got %u\n", bpc);
1945                 return false;
1946         }
1947
1948         if (!info->is_hdmi &&
1949             (format != VC4_HDMI_OUTPUT_RGB || bpc != 8)) {
1950                 drm_dbg(dev, "DVI Monitors require an RGB output at 8 bpc\n");
1951                 return false;
1952         }
1953
1954         switch (format) {
1955         case VC4_HDMI_OUTPUT_RGB:
1956                 drm_dbg(dev, "RGB Format, checking the constraints.\n");
1957
1958                 if (!(info->color_formats & DRM_COLOR_FORMAT_RGB444))
1959                         return false;
1960
1961                 if (bpc == 10 && !(info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_30)) {
1962                         drm_dbg(dev, "10 BPC but sink doesn't support Deep Color 30.\n");
1963                         return false;
1964                 }
1965
1966                 if (bpc == 12 && !(info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_36)) {
1967                         drm_dbg(dev, "12 BPC but sink doesn't support Deep Color 36.\n");
1968                         return false;
1969                 }
1970
1971                 drm_dbg(dev, "RGB format supported in that configuration.\n");
1972
1973                 return true;
1974
1975         case VC4_HDMI_OUTPUT_YUV422:
1976                 drm_dbg(dev, "YUV422 format, checking the constraints.\n");
1977
1978                 if (!(info->color_formats & DRM_COLOR_FORMAT_YCBCR422)) {
1979                         drm_dbg(dev, "Sink doesn't support YUV422.\n");
1980                         return false;
1981                 }
1982
1983                 if (bpc != 12) {
1984                         drm_dbg(dev, "YUV422 only supports 12 bpc.\n");
1985                         return false;
1986                 }
1987
1988                 drm_dbg(dev, "YUV422 format supported in that configuration.\n");
1989
1990                 return true;
1991
1992         case VC4_HDMI_OUTPUT_YUV444:
1993                 drm_dbg(dev, "YUV444 format, checking the constraints.\n");
1994
1995                 if (!(info->color_formats & DRM_COLOR_FORMAT_YCBCR444)) {
1996                         drm_dbg(dev, "Sink doesn't support YUV444.\n");
1997                         return false;
1998                 }
1999
2000                 if (bpc == 10 && !(info->edid_hdmi_ycbcr444_dc_modes & DRM_EDID_HDMI_DC_30)) {
2001                         drm_dbg(dev, "10 BPC but sink doesn't support Deep Color 30.\n");
2002                         return false;
2003                 }
2004
2005                 if (bpc == 12 && !(info->edid_hdmi_ycbcr444_dc_modes & DRM_EDID_HDMI_DC_36)) {
2006                         drm_dbg(dev, "12 BPC but sink doesn't support Deep Color 36.\n");
2007                         return false;
2008                 }
2009
2010                 drm_dbg(dev, "YUV444 format supported in that configuration.\n");
2011
2012                 return true;
2013         }
2014
2015         return false;
2016 }
2017
2018 static enum drm_mode_status
2019 vc4_hdmi_encoder_clock_valid(const struct vc4_hdmi *vc4_hdmi,
2020                              const struct drm_display_mode *mode,
2021                              unsigned long long clock)
2022 {
2023         const struct drm_connector *connector = &vc4_hdmi->connector;
2024         const struct drm_display_info *info = &connector->display_info;
2025         struct vc4_dev *vc4 = to_vc4_dev(connector->dev);
2026
2027         if (clock > vc4_hdmi->variant->max_pixel_clock)
2028                 return MODE_CLOCK_HIGH;
2029
2030         if (!vc4->hvs->vc5_hdmi_enable_hdmi_20 && clock > HDMI_14_MAX_TMDS_CLK)
2031                 return MODE_CLOCK_HIGH;
2032
2033         /* 4096x2160@60 is not reliable without overclocking core */
2034         if (!vc4->hvs->vc5_hdmi_enable_4096by2160 &&
2035             mode->hdisplay > 3840 && mode->vdisplay >= 2160 &&
2036             drm_mode_vrefresh(mode) >= 50)
2037                 return MODE_CLOCK_HIGH;
2038
2039         if (info->max_tmds_clock && clock > (info->max_tmds_clock * 1000))
2040                 return MODE_CLOCK_HIGH;
2041
2042         return MODE_OK;
2043 }
2044
2045 static unsigned long long
2046 vc4_hdmi_encoder_compute_mode_clock(const struct drm_display_mode *mode,
2047                                     unsigned int bpc,
2048                                     enum vc4_hdmi_output_format fmt)
2049 {
2050         unsigned long long clock = mode->clock * 1000ULL;
2051
2052         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
2053                 clock = clock * 2;
2054
2055         if (fmt == VC4_HDMI_OUTPUT_YUV422)
2056                 bpc = 8;
2057
2058         clock = clock * bpc;
2059         do_div(clock, 8);
2060
2061         return clock;
2062 }
2063
2064 static int
2065 vc4_hdmi_encoder_compute_clock(const struct vc4_hdmi *vc4_hdmi,
2066                                struct vc4_hdmi_connector_state *vc4_state,
2067                                const struct drm_display_mode *mode,
2068                                unsigned int bpc, unsigned int fmt)
2069 {
2070         unsigned long long clock;
2071
2072         clock = vc4_hdmi_encoder_compute_mode_clock(mode, bpc, fmt);
2073         if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode, clock) != MODE_OK)
2074                 return -EINVAL;
2075
2076         vc4_state->tmds_char_rate = clock;
2077
2078         return 0;
2079 }
2080
2081 static int
2082 vc4_hdmi_encoder_compute_format(const struct vc4_hdmi *vc4_hdmi,
2083                                 struct vc4_hdmi_connector_state *vc4_state,
2084                                 const struct drm_display_mode *mode,
2085                                 unsigned int bpc)
2086 {
2087         struct drm_device *dev = vc4_hdmi->connector.dev;
2088         const struct drm_connector *connector = &vc4_hdmi->connector;
2089         const struct drm_display_info *info = &connector->display_info;
2090         unsigned int format;
2091
2092         drm_dbg(dev, "Trying with an RGB output\n");
2093
2094         format = VC4_HDMI_OUTPUT_RGB;
2095         if (vc4_hdmi_sink_supports_format_bpc(vc4_hdmi, info, mode, format, bpc)) {
2096                 int ret;
2097
2098                 ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi, vc4_state,
2099                                                      mode, bpc, format);
2100                 if (!ret) {
2101                         vc4_state->output_format = format;
2102                         return 0;
2103                 }
2104         }
2105
2106         drm_dbg(dev, "Failed, Trying with an YUV422 output\n");
2107
2108         format = VC4_HDMI_OUTPUT_YUV422;
2109         if (vc4_hdmi_sink_supports_format_bpc(vc4_hdmi, info, mode, format, bpc)) {
2110                 int ret;
2111
2112                 ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi, vc4_state,
2113                                                      mode, bpc, format);
2114                 if (!ret) {
2115                         vc4_state->output_format = format;
2116                         return 0;
2117                 }
2118         }
2119
2120         drm_dbg(dev, "Failed. No Format Supported for that bpc count.\n");
2121
2122         return -EINVAL;
2123 }
2124
2125 static int
2126 vc4_hdmi_encoder_compute_config(const struct vc4_hdmi *vc4_hdmi,
2127                                 struct vc4_hdmi_connector_state *vc4_state,
2128                                 const struct drm_display_mode *mode)
2129 {
2130         struct drm_device *dev = vc4_hdmi->connector.dev;
2131         struct drm_connector_state *conn_state = &vc4_state->base;
2132         unsigned int max_bpc = clamp_t(unsigned int, conn_state->max_bpc, 8, 12);
2133         unsigned int bpc;
2134         int ret;
2135
2136         for (bpc = max_bpc; bpc >= 8; bpc -= 2) {
2137                 drm_dbg(dev, "Trying with a %d bpc output\n", bpc);
2138
2139                 ret = vc4_hdmi_encoder_compute_format(vc4_hdmi, vc4_state,
2140                                                       mode, bpc);
2141                 if (ret)
2142                         continue;
2143
2144                 vc4_state->output_bpc = bpc;
2145
2146                 drm_dbg(dev,
2147                         "Mode %ux%u @ %uHz: Found configuration: bpc: %u, fmt: %s, clock: %llu\n",
2148                         mode->hdisplay, mode->vdisplay, drm_mode_vrefresh(mode),
2149                         vc4_state->output_bpc,
2150                         vc4_hdmi_output_fmt_str(vc4_state->output_format),
2151                         vc4_state->tmds_char_rate);
2152
2153                 break;
2154         }
2155
2156         return ret;
2157 }
2158
2159 #define WIFI_2_4GHz_CH1_MIN_FREQ        2400000000ULL
2160 #define WIFI_2_4GHz_CH1_MAX_FREQ        2422000000ULL
2161
2162 static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
2163                                          struct drm_crtc_state *crtc_state,
2164                                          struct drm_connector_state *conn_state)
2165 {
2166         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
2167         struct drm_connector *connector = &vc4_hdmi->connector;
2168         struct drm_connector_state *old_conn_state =
2169                 drm_atomic_get_old_connector_state(conn_state->state, connector);
2170         struct vc4_hdmi_connector_state *old_vc4_state =
2171                 conn_state_to_vc4_hdmi_conn_state(old_conn_state);
2172         struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state);
2173         struct drm_display_mode *mode = &crtc_state->adjusted_mode;
2174         unsigned long long tmds_char_rate = mode->clock * 1000;
2175         unsigned long long tmds_bit_rate;
2176         int ret;
2177
2178         if (vc4_hdmi->variant->unsupported_odd_h_timings) {
2179                 if (mode->flags & DRM_MODE_FLAG_DBLCLK) {
2180                         /* Only try to fixup DBLCLK modes to get 480i and 576i
2181                          * working.
2182                          * A generic solution for all modes with odd horizontal
2183                          * timing values seems impossible based on trying to
2184                          * solve it for 1366x768 monitors.
2185                          */
2186                         if ((mode->hsync_start - mode->hdisplay) & 1)
2187                                 mode->hsync_start--;
2188                         if ((mode->hsync_end - mode->hsync_start) & 1)
2189                                 mode->hsync_end--;
2190                 }
2191
2192                 /* Now check whether we still have odd values remaining */
2193                 if ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
2194                     (mode->hsync_end % 2) || (mode->htotal % 2))
2195                         return -EINVAL;
2196         }
2197
2198         /*
2199          * The 1440p@60 pixel rate is in the same range than the first
2200          * WiFi channel (between 2.4GHz and 2.422GHz with 22MHz
2201          * bandwidth). Slightly lower the frequency to bring it out of
2202          * the WiFi range.
2203          */
2204         tmds_bit_rate = tmds_char_rate * 10;
2205         if (vc4_hdmi->disable_wifi_frequencies &&
2206             (tmds_bit_rate >= WIFI_2_4GHz_CH1_MIN_FREQ &&
2207              tmds_bit_rate <= WIFI_2_4GHz_CH1_MAX_FREQ)) {
2208                 mode->clock = 238560;
2209                 tmds_char_rate = mode->clock * 1000;
2210         }
2211
2212         ret = vc4_hdmi_encoder_compute_config(vc4_hdmi, vc4_state, mode);
2213         if (ret)
2214                 return ret;
2215
2216         /* vc4_hdmi_encoder_compute_config may have changed output_bpc and/or output_format */
2217         if (vc4_state->output_bpc != old_vc4_state->output_bpc ||
2218             vc4_state->output_format != old_vc4_state->output_format)
2219                 crtc_state->mode_changed = true;
2220
2221         return 0;
2222 }
2223
2224 static enum drm_mode_status
2225 vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder,
2226                             const struct drm_display_mode *mode)
2227 {
2228         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
2229
2230         if (vc4_hdmi->variant->unsupported_odd_h_timings &&
2231             !(mode->flags & DRM_MODE_FLAG_DBLCLK) &&
2232             ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
2233              (mode->hsync_end % 2) || (mode->htotal % 2)))
2234                 return MODE_H_ILLEGAL;
2235
2236         return vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode, mode->clock * 1000);
2237 }
2238
2239 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
2240         .atomic_check = vc4_hdmi_encoder_atomic_check,
2241         .atomic_mode_set = vc4_hdmi_encoder_atomic_mode_set,
2242         .mode_valid = vc4_hdmi_encoder_mode_valid,
2243 };
2244
2245 static int vc4_hdmi_late_register(struct drm_encoder *encoder)
2246 {
2247         struct drm_device *drm = encoder->dev;
2248         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
2249         const struct vc4_hdmi_variant *variant = vc4_hdmi->variant;
2250
2251         drm_debugfs_add_file(drm, variant->debugfs_name,
2252                              vc4_hdmi_debugfs_regs, vc4_hdmi);
2253
2254         return 0;
2255 }
2256
2257 static const struct drm_encoder_funcs vc4_hdmi_encoder_funcs = {
2258         .late_register = vc4_hdmi_late_register,
2259 };
2260
2261 static u32 vc4_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask)
2262 {
2263         int i;
2264         u32 channel_map = 0;
2265
2266         for (i = 0; i < 8; i++) {
2267                 if (channel_mask & BIT(i))
2268                         channel_map |= i << (3 * i);
2269         }
2270         return channel_map;
2271 }
2272
2273 static u32 vc5_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask)
2274 {
2275         int i;
2276         u32 channel_map = 0;
2277
2278         for (i = 0; i < 8; i++) {
2279                 if (channel_mask & BIT(i))
2280                         channel_map |= i << (4 * i);
2281         }
2282         return channel_map;
2283 }
2284
2285 static bool vc5_hdmi_hp_detect(struct vc4_hdmi *vc4_hdmi)
2286 {
2287         struct drm_device *drm = vc4_hdmi->connector.dev;
2288         unsigned long flags;
2289         u32 hotplug;
2290         int idx;
2291
2292         if (!drm_dev_enter(drm, &idx))
2293                 return false;
2294
2295         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
2296         hotplug = HDMI_READ(HDMI_HOTPLUG);
2297         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
2298
2299         drm_dev_exit(idx);
2300
2301         return !!(hotplug & VC4_HDMI_HOTPLUG_CONNECTED);
2302 }
2303
2304 /* HDMI audio codec callbacks */
2305 static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi,
2306                                          unsigned int samplerate)
2307 {
2308         struct drm_device *drm = vc4_hdmi->connector.dev;
2309         u32 hsm_clock;
2310         unsigned long flags;
2311         unsigned long n, m;
2312         int idx;
2313
2314         if (!drm_dev_enter(drm, &idx))
2315                 return;
2316
2317         hsm_clock = clk_get_rate(vc4_hdmi->audio_clock);
2318         rational_best_approximation(hsm_clock, samplerate,
2319                                     VC4_HD_MAI_SMP_N_MASK >>
2320                                     VC4_HD_MAI_SMP_N_SHIFT,
2321                                     (VC4_HD_MAI_SMP_M_MASK >>
2322                                      VC4_HD_MAI_SMP_M_SHIFT) + 1,
2323                                     &n, &m);
2324
2325         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
2326         HDMI_WRITE(HDMI_MAI_SMP,
2327                    VC4_SET_FIELD(n, VC4_HD_MAI_SMP_N) |
2328                    VC4_SET_FIELD(m - 1, VC4_HD_MAI_SMP_M));
2329         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
2330
2331         drm_dev_exit(idx);
2332 }
2333
2334 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *vc4_hdmi, unsigned int samplerate)
2335 {
2336         const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
2337         u32 n, cts;
2338         u64 tmp;
2339
2340         lockdep_assert_held(&vc4_hdmi->mutex);
2341         lockdep_assert_held(&vc4_hdmi->hw_lock);
2342
2343         n = 128 * samplerate / 1000;
2344         tmp = (u64)(mode->clock * 1000) * n;
2345         do_div(tmp, 128 * samplerate);
2346         cts = tmp;
2347
2348         HDMI_WRITE(HDMI_CRP_CFG,
2349                    VC4_HDMI_CRP_CFG_EXTERNAL_CTS_EN |
2350                    VC4_SET_FIELD(n, VC4_HDMI_CRP_CFG_N));
2351
2352         /*
2353          * We could get slightly more accurate clocks in some cases by
2354          * providing a CTS_1 value.  The two CTS values are alternated
2355          * between based on the period fields
2356          */
2357         HDMI_WRITE(HDMI_CTS_0, cts);
2358         HDMI_WRITE(HDMI_CTS_1, cts);
2359 }
2360
2361 static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai)
2362 {
2363         struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
2364
2365         return snd_soc_card_get_drvdata(card);
2366 }
2367
2368 static bool vc4_hdmi_audio_can_stream(struct vc4_hdmi *vc4_hdmi)
2369 {
2370         struct drm_display_info *display = &vc4_hdmi->connector.display_info;
2371
2372         lockdep_assert_held(&vc4_hdmi->mutex);
2373
2374         /*
2375          * If the encoder is currently in DVI mode, treat the codec DAI
2376          * as missing.
2377          */
2378         if (!display->is_hdmi)
2379                 return false;
2380
2381         return true;
2382 }
2383
2384 static int vc4_hdmi_audio_startup(struct device *dev, void *data)
2385 {
2386         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
2387         struct drm_device *drm = vc4_hdmi->connector.dev;
2388         unsigned long flags;
2389         int ret = 0;
2390         int idx;
2391
2392         mutex_lock(&vc4_hdmi->mutex);
2393
2394         if (!drm_dev_enter(drm, &idx)) {
2395                 ret = -ENODEV;
2396                 goto out;
2397         }
2398
2399         if (!vc4_hdmi_audio_can_stream(vc4_hdmi)) {
2400                 ret = -ENODEV;
2401                 goto out_dev_exit;
2402         }
2403
2404         vc4_hdmi->audio.streaming = true;
2405
2406         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
2407         HDMI_WRITE(HDMI_MAI_CTL,
2408                    VC4_HD_MAI_CTL_RESET |
2409                    VC4_HD_MAI_CTL_FLUSH |
2410                    VC4_HD_MAI_CTL_DLATE |
2411                    VC4_HD_MAI_CTL_ERRORE |
2412                    VC4_HD_MAI_CTL_ERRORF);
2413         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
2414
2415         if (vc4_hdmi->variant->phy_rng_enable)
2416                 vc4_hdmi->variant->phy_rng_enable(vc4_hdmi);
2417
2418 out_dev_exit:
2419         drm_dev_exit(idx);
2420 out:
2421         mutex_unlock(&vc4_hdmi->mutex);
2422
2423         return ret;
2424 }
2425
2426 static void vc4_hdmi_audio_reset(struct vc4_hdmi *vc4_hdmi)
2427 {
2428         struct drm_encoder *encoder = &vc4_hdmi->encoder.base;
2429         struct device *dev = &vc4_hdmi->pdev->dev;
2430         unsigned long flags;
2431         int ret;
2432
2433         lockdep_assert_held(&vc4_hdmi->mutex);
2434
2435         vc4_hdmi->audio.streaming = false;
2436         ret = vc4_hdmi_stop_packet(encoder, HDMI_INFOFRAME_TYPE_AUDIO, false);
2437         if (ret)
2438                 dev_err(dev, "Failed to stop audio infoframe: %d\n", ret);
2439
2440         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
2441
2442         HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_RESET);
2443         HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_ERRORF);
2444         HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_FLUSH);
2445
2446         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
2447 }
2448
2449 static void vc4_hdmi_audio_shutdown(struct device *dev, void *data)
2450 {
2451         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
2452         struct drm_device *drm = vc4_hdmi->connector.dev;
2453         unsigned long flags;
2454         int idx;
2455
2456         mutex_lock(&vc4_hdmi->mutex);
2457
2458         if (!drm_dev_enter(drm, &idx))
2459                 goto out;
2460
2461         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
2462
2463         HDMI_WRITE(HDMI_MAI_CTL,
2464                    VC4_HD_MAI_CTL_DLATE |
2465                    VC4_HD_MAI_CTL_ERRORE |
2466                    VC4_HD_MAI_CTL_ERRORF);
2467
2468         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
2469
2470         if (vc4_hdmi->variant->phy_rng_disable)
2471                 vc4_hdmi->variant->phy_rng_disable(vc4_hdmi);
2472
2473         vc4_hdmi->audio.streaming = false;
2474         vc4_hdmi_audio_reset(vc4_hdmi);
2475
2476         drm_dev_exit(idx);
2477
2478 out:
2479         mutex_unlock(&vc4_hdmi->mutex);
2480 }
2481
2482 static int sample_rate_to_mai_fmt(int samplerate)
2483 {
2484         switch (samplerate) {
2485         case 8000:
2486                 return VC4_HDMI_MAI_SAMPLE_RATE_8000;
2487         case 11025:
2488                 return VC4_HDMI_MAI_SAMPLE_RATE_11025;
2489         case 12000:
2490                 return VC4_HDMI_MAI_SAMPLE_RATE_12000;
2491         case 16000:
2492                 return VC4_HDMI_MAI_SAMPLE_RATE_16000;
2493         case 22050:
2494                 return VC4_HDMI_MAI_SAMPLE_RATE_22050;
2495         case 24000:
2496                 return VC4_HDMI_MAI_SAMPLE_RATE_24000;
2497         case 32000:
2498                 return VC4_HDMI_MAI_SAMPLE_RATE_32000;
2499         case 44100:
2500                 return VC4_HDMI_MAI_SAMPLE_RATE_44100;
2501         case 48000:
2502                 return VC4_HDMI_MAI_SAMPLE_RATE_48000;
2503         case 64000:
2504                 return VC4_HDMI_MAI_SAMPLE_RATE_64000;
2505         case 88200:
2506                 return VC4_HDMI_MAI_SAMPLE_RATE_88200;
2507         case 96000:
2508                 return VC4_HDMI_MAI_SAMPLE_RATE_96000;
2509         case 128000:
2510                 return VC4_HDMI_MAI_SAMPLE_RATE_128000;
2511         case 176400:
2512                 return VC4_HDMI_MAI_SAMPLE_RATE_176400;
2513         case 192000:
2514                 return VC4_HDMI_MAI_SAMPLE_RATE_192000;
2515         default:
2516                 return VC4_HDMI_MAI_SAMPLE_RATE_NOT_INDICATED;
2517         }
2518 }
2519
2520 /* HDMI audio codec callbacks */
2521 static int vc4_hdmi_audio_prepare(struct device *dev, void *data,
2522                                   struct hdmi_codec_daifmt *daifmt,
2523                                   struct hdmi_codec_params *params)
2524 {
2525         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
2526         struct drm_device *drm = vc4_hdmi->connector.dev;
2527         struct drm_encoder *encoder = &vc4_hdmi->encoder.base;
2528         unsigned int sample_rate = params->sample_rate;
2529         unsigned int channels = params->channels;
2530         unsigned long flags;
2531         u32 audio_packet_config, channel_mask;
2532         u32 channel_map;
2533         u32 mai_audio_format;
2534         u32 mai_sample_rate;
2535         int ret = 0;
2536         int idx;
2537
2538         dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
2539                 sample_rate, params->sample_width, channels);
2540
2541         mutex_lock(&vc4_hdmi->mutex);
2542
2543         if (!drm_dev_enter(drm, &idx)) {
2544                 ret = -ENODEV;
2545                 goto out;
2546         }
2547
2548         if (!vc4_hdmi_audio_can_stream(vc4_hdmi)) {
2549                 ret = -EINVAL;
2550                 goto out_dev_exit;
2551         }
2552
2553         vc4_hdmi_audio_set_mai_clock(vc4_hdmi, sample_rate);
2554
2555         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
2556         HDMI_WRITE(HDMI_MAI_CTL,
2557                    VC4_SET_FIELD(channels, VC4_HD_MAI_CTL_CHNUM) |
2558                    VC4_HD_MAI_CTL_WHOLSMP |
2559                    VC4_HD_MAI_CTL_CHALIGN |
2560                    VC4_HD_MAI_CTL_ENABLE);
2561
2562         mai_sample_rate = sample_rate_to_mai_fmt(sample_rate);
2563         if (params->iec.status[0] & IEC958_AES0_NONAUDIO &&
2564             params->channels == 8)
2565                 mai_audio_format = VC4_HDMI_MAI_FORMAT_HBR;
2566         else
2567                 mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM;
2568         HDMI_WRITE(HDMI_MAI_FMT,
2569                    VC4_SET_FIELD(mai_sample_rate,
2570                                  VC4_HDMI_MAI_FORMAT_SAMPLE_RATE) |
2571                    VC4_SET_FIELD(mai_audio_format,
2572                                  VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT));
2573
2574         /* The B frame identifier should match the value used by alsa-lib (8) */
2575         audio_packet_config =
2576                 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
2577                 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS |
2578                 VC4_SET_FIELD(0x8, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
2579
2580         channel_mask = GENMASK(channels - 1, 0);
2581         audio_packet_config |= VC4_SET_FIELD(channel_mask,
2582                                              VC4_HDMI_AUDIO_PACKET_CEA_MASK);
2583
2584         /* Set the MAI threshold */
2585         HDMI_WRITE(HDMI_MAI_THR,
2586                    VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_PANICHIGH) |
2587                    VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_PANICLOW) |
2588                    VC4_SET_FIELD(0x06, VC4_HD_MAI_THR_DREQHIGH) |
2589                    VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_DREQLOW));
2590
2591         HDMI_WRITE(HDMI_MAI_CONFIG,
2592                    VC4_HDMI_MAI_CONFIG_BIT_REVERSE |
2593                    VC4_HDMI_MAI_CONFIG_FORMAT_REVERSE |
2594                    VC4_SET_FIELD(channel_mask, VC4_HDMI_MAI_CHANNEL_MASK));
2595
2596         channel_map = vc4_hdmi->variant->channel_map(vc4_hdmi, channel_mask);
2597         HDMI_WRITE(HDMI_MAI_CHANNEL_MAP, channel_map);
2598         HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
2599
2600         vc4_hdmi_set_n_cts(vc4_hdmi, sample_rate);
2601
2602         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
2603
2604         memcpy(&vc4_hdmi->audio.infoframe, &params->cea, sizeof(params->cea));
2605         vc4_hdmi_set_audio_infoframe(encoder);
2606
2607 out_dev_exit:
2608         drm_dev_exit(idx);
2609 out:
2610         mutex_unlock(&vc4_hdmi->mutex);
2611
2612         return ret;
2613 }
2614
2615 static const struct snd_soc_component_driver vc4_hdmi_audio_cpu_dai_comp = {
2616         .name = "vc4-hdmi-cpu-dai-component",
2617         .legacy_dai_naming = 1,
2618 };
2619
2620 static int vc4_hdmi_audio_cpu_dai_probe(struct snd_soc_dai *dai)
2621 {
2622         struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
2623
2624         snd_soc_dai_init_dma_data(dai, &vc4_hdmi->audio.dma_data, NULL);
2625
2626         return 0;
2627 }
2628
2629 static const struct snd_soc_dai_ops vc4_snd_dai_ops = {
2630         .probe  = vc4_hdmi_audio_cpu_dai_probe,
2631 };
2632
2633 static struct snd_soc_dai_driver vc4_hdmi_audio_cpu_dai_drv = {
2634         .name = "vc4-hdmi-cpu-dai",
2635         .ops = &vc4_snd_dai_ops,
2636         .playback = {
2637                 .stream_name = "Playback",
2638                 .channels_min = 1,
2639                 .channels_max = 8,
2640                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
2641                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
2642                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
2643                          SNDRV_PCM_RATE_192000,
2644                 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
2645         },
2646 };
2647
2648 static const struct snd_dmaengine_pcm_config pcm_conf = {
2649         .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-rx",
2650         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
2651 };
2652
2653 static int vc4_hdmi_audio_get_eld(struct device *dev, void *data,
2654                                   uint8_t *buf, size_t len)
2655 {
2656         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
2657         struct drm_connector *connector = &vc4_hdmi->connector;
2658
2659         mutex_lock(&vc4_hdmi->mutex);
2660         memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
2661         mutex_unlock(&vc4_hdmi->mutex);
2662
2663         return 0;
2664 }
2665
2666 static const struct hdmi_codec_ops vc4_hdmi_codec_ops = {
2667         .get_eld = vc4_hdmi_audio_get_eld,
2668         .prepare = vc4_hdmi_audio_prepare,
2669         .audio_shutdown = vc4_hdmi_audio_shutdown,
2670         .audio_startup = vc4_hdmi_audio_startup,
2671 };
2672
2673 static struct hdmi_codec_pdata vc4_hdmi_codec_pdata = {
2674         .ops = &vc4_hdmi_codec_ops,
2675         .max_i2s_channels = 8,
2676         .i2s = 1,
2677 };
2678
2679 static void vc4_hdmi_audio_codec_release(void *ptr)
2680 {
2681         struct vc4_hdmi *vc4_hdmi = ptr;
2682
2683         platform_device_unregister(vc4_hdmi->audio.codec_pdev);
2684         vc4_hdmi->audio.codec_pdev = NULL;
2685 }
2686
2687 static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
2688 {
2689         const struct vc4_hdmi_register *mai_data =
2690                 &vc4_hdmi->variant->registers[HDMI_MAI_DATA];
2691         struct snd_soc_dai_link *dai_link = &vc4_hdmi->audio.link;
2692         struct snd_soc_card *card = &vc4_hdmi->audio.card;
2693         struct device *dev = &vc4_hdmi->pdev->dev;
2694         struct platform_device *codec_pdev;
2695         const __be32 *addr;
2696         int index, len;
2697         int ret;
2698
2699         /*
2700          * ASoC makes it a bit hard to retrieve a pointer to the
2701          * vc4_hdmi structure. Registering the card will overwrite our
2702          * device drvdata with a pointer to the snd_soc_card structure,
2703          * which can then be used to retrieve whatever drvdata we want
2704          * to associate.
2705          *
2706          * However, that doesn't fly in the case where we wouldn't
2707          * register an ASoC card (because of an old DT that is missing
2708          * the dmas properties for example), then the card isn't
2709          * registered and the device drvdata wouldn't be set.
2710          *
2711          * We can deal with both cases by making sure a snd_soc_card
2712          * pointer and a vc4_hdmi structure are pointing to the same
2713          * memory address, so we can treat them indistinctly without any
2714          * issue.
2715          */
2716         BUILD_BUG_ON(offsetof(struct vc4_hdmi_audio, card) != 0);
2717         BUILD_BUG_ON(offsetof(struct vc4_hdmi, audio) != 0);
2718
2719         if (!of_find_property(dev->of_node, "dmas", &len) || !len) {
2720                 dev_warn(dev,
2721                          "'dmas' DT property is missing or empty, no HDMI audio\n");
2722                 return 0;
2723         }
2724
2725         if (mai_data->reg != VC4_HD) {
2726                 WARN_ONCE(true, "MAI isn't in the HD block\n");
2727                 return -EINVAL;
2728         }
2729
2730         /*
2731          * Get the physical address of VC4_HD_MAI_DATA. We need to retrieve
2732          * the bus address specified in the DT, because the physical address
2733          * (the one returned by platform_get_resource()) is not appropriate
2734          * for DMA transfers.
2735          * This VC/MMU should probably be exposed to avoid this kind of hacks.
2736          */
2737         index = of_property_match_string(dev->of_node, "reg-names", "hd");
2738         /* Before BCM2711, we don't have a named register range */
2739         if (index < 0)
2740                 index = 1;
2741
2742         addr = of_get_address(dev->of_node, index, NULL, NULL);
2743
2744         vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset;
2745         vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
2746         vc4_hdmi->audio.dma_data.maxburst = 2;
2747
2748         /*
2749          * NOTE: Strictly speaking, we should probably use a DRM-managed
2750          * registration there to avoid removing all the audio components
2751          * by the time the driver doesn't have any user anymore.
2752          *
2753          * However, the ASoC core uses a number of devm_kzalloc calls
2754          * when registering, even when using non-device-managed
2755          * functions (such as in snd_soc_register_component()).
2756          *
2757          * If we call snd_soc_unregister_component() in a DRM-managed
2758          * action, the device-managed actions have already been executed
2759          * and thus we would access memory that has been freed.
2760          *
2761          * Using device-managed hooks here probably leaves us open to a
2762          * bunch of issues if userspace still has a handle on the ALSA
2763          * device when the device is removed. However, this is mitigated
2764          * by the use of drm_dev_enter()/drm_dev_exit() in the audio
2765          * path to prevent the access to the device resources if it
2766          * isn't there anymore.
2767          *
2768          * Then, the vc4_hdmi structure is DRM-managed and thus only
2769          * freed whenever the last user has closed the DRM device file.
2770          * It should thus outlive ALSA in most situations.
2771          */
2772         ret = devm_snd_dmaengine_pcm_register(dev, &pcm_conf, 0);
2773         if (ret) {
2774                 dev_err(dev, "Could not register PCM component: %d\n", ret);
2775                 return ret;
2776         }
2777
2778         ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_cpu_dai_comp,
2779                                               &vc4_hdmi_audio_cpu_dai_drv, 1);
2780         if (ret) {
2781                 dev_err(dev, "Could not register CPU DAI: %d\n", ret);
2782                 return ret;
2783         }
2784
2785         codec_pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
2786                                                    PLATFORM_DEVID_AUTO,
2787                                                    &vc4_hdmi_codec_pdata,
2788                                                    sizeof(vc4_hdmi_codec_pdata));
2789         if (IS_ERR(codec_pdev)) {
2790                 dev_err(dev, "Couldn't register the HDMI codec: %ld\n", PTR_ERR(codec_pdev));
2791                 return PTR_ERR(codec_pdev);
2792         }
2793         vc4_hdmi->audio.codec_pdev = codec_pdev;
2794
2795         ret = devm_add_action_or_reset(dev, vc4_hdmi_audio_codec_release, vc4_hdmi);
2796         if (ret)
2797                 return ret;
2798
2799         dai_link->cpus          = &vc4_hdmi->audio.cpu;
2800         dai_link->codecs        = &vc4_hdmi->audio.codec;
2801         dai_link->platforms     = &vc4_hdmi->audio.platform;
2802
2803         dai_link->num_cpus      = 1;
2804         dai_link->num_codecs    = 1;
2805         dai_link->num_platforms = 1;
2806
2807         dai_link->name = "MAI";
2808         dai_link->stream_name = "MAI PCM";
2809         dai_link->codecs->dai_name = "i2s-hifi";
2810         dai_link->cpus->dai_name = dev_name(dev);
2811         dai_link->codecs->name = dev_name(&codec_pdev->dev);
2812         dai_link->platforms->name = dev_name(dev);
2813
2814         card->dai_link = dai_link;
2815         card->num_links = 1;
2816         card->name = vc4_hdmi->variant->card_name;
2817         card->driver_name = "vc4-hdmi";
2818         card->dev = dev;
2819         card->owner = THIS_MODULE;
2820
2821         /*
2822          * Be careful, snd_soc_register_card() calls dev_set_drvdata() and
2823          * stores a pointer to the snd card object in dev->driver_data. This
2824          * means we cannot use it for something else. The hdmi back-pointer is
2825          * now stored in card->drvdata and should be retrieved with
2826          * snd_soc_card_get_drvdata() if needed.
2827          */
2828         snd_soc_card_set_drvdata(card, vc4_hdmi);
2829         ret = devm_snd_soc_register_card(dev, card);
2830         if (ret)
2831                 dev_err_probe(dev, ret, "Could not register sound card\n");
2832
2833         return ret;
2834
2835 }
2836
2837 static irqreturn_t vc4_hdmi_hpd_irq_thread(int irq, void *priv)
2838 {
2839         struct vc4_hdmi *vc4_hdmi = priv;
2840         struct drm_connector *connector = &vc4_hdmi->connector;
2841         struct drm_device *dev = connector->dev;
2842
2843         if (dev && dev->registered)
2844                 drm_connector_helper_hpd_irq_event(connector);
2845
2846         return IRQ_HANDLED;
2847 }
2848
2849 static int vc4_hdmi_hotplug_init(struct vc4_hdmi *vc4_hdmi)
2850 {
2851         struct drm_connector *connector = &vc4_hdmi->connector;
2852         struct platform_device *pdev = vc4_hdmi->pdev;
2853         int ret;
2854
2855         if (vc4_hdmi->variant->external_irq_controller) {
2856                 unsigned int hpd_con = platform_get_irq_byname(pdev, "hpd-connected");
2857                 unsigned int hpd_rm = platform_get_irq_byname(pdev, "hpd-removed");
2858
2859                 ret = devm_request_threaded_irq(&pdev->dev, hpd_con,
2860                                                 NULL,
2861                                                 vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT,
2862                                                 "vc4 hdmi hpd connected", vc4_hdmi);
2863                 if (ret)
2864                         return ret;
2865
2866                 ret = devm_request_threaded_irq(&pdev->dev, hpd_rm,
2867                                                 NULL,
2868                                                 vc4_hdmi_hpd_irq_thread, IRQF_ONESHOT,
2869                                                 "vc4 hdmi hpd disconnected", vc4_hdmi);
2870                 if (ret)
2871                         return ret;
2872
2873                 connector->polled = DRM_CONNECTOR_POLL_HPD;
2874         }
2875
2876         return 0;
2877 }
2878
2879 #ifdef CONFIG_DRM_VC4_HDMI_CEC
2880 static irqreturn_t vc4_cec_irq_handler_rx_thread(int irq, void *priv)
2881 {
2882         struct vc4_hdmi *vc4_hdmi = priv;
2883
2884         if (vc4_hdmi->cec_rx_msg.len)
2885                 cec_received_msg(vc4_hdmi->cec_adap,
2886                                  &vc4_hdmi->cec_rx_msg);
2887
2888         return IRQ_HANDLED;
2889 }
2890
2891 static irqreturn_t vc4_cec_irq_handler_tx_thread(int irq, void *priv)
2892 {
2893         struct vc4_hdmi *vc4_hdmi = priv;
2894
2895         if (vc4_hdmi->cec_tx_ok) {
2896                 cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_OK,
2897                                   0, 0, 0, 0);
2898         } else {
2899                 /*
2900                  * This CEC implementation makes 1 retry, so if we
2901                  * get a NACK, then that means it made 2 attempts.
2902                  */
2903                 cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_NACK,
2904                                   0, 2, 0, 0);
2905         }
2906         return IRQ_HANDLED;
2907 }
2908
2909 static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
2910 {
2911         struct vc4_hdmi *vc4_hdmi = priv;
2912         irqreturn_t ret;
2913
2914         if (vc4_hdmi->cec_irq_was_rx)
2915                 ret = vc4_cec_irq_handler_rx_thread(irq, priv);
2916         else
2917                 ret = vc4_cec_irq_handler_tx_thread(irq, priv);
2918
2919         return ret;
2920 }
2921
2922 static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1)
2923 {
2924         struct drm_device *dev = vc4_hdmi->connector.dev;
2925         struct cec_msg *msg = &vc4_hdmi->cec_rx_msg;
2926         unsigned int i;
2927
2928         lockdep_assert_held(&vc4_hdmi->hw_lock);
2929
2930         msg->len = 1 + ((cntrl1 & VC4_HDMI_CEC_REC_WRD_CNT_MASK) >>
2931                                         VC4_HDMI_CEC_REC_WRD_CNT_SHIFT);
2932
2933         if (msg->len > 16) {
2934                 drm_err(dev, "Attempting to read too much data (%d)\n", msg->len);
2935                 return;
2936         }
2937
2938         for (i = 0; i < msg->len; i += 4) {
2939                 u32 val = HDMI_READ(HDMI_CEC_RX_DATA_1 + (i >> 2));
2940
2941                 msg->msg[i] = val & 0xff;
2942                 msg->msg[i + 1] = (val >> 8) & 0xff;
2943                 msg->msg[i + 2] = (val >> 16) & 0xff;
2944                 msg->msg[i + 3] = (val >> 24) & 0xff;
2945         }
2946 }
2947
2948 static irqreturn_t vc4_cec_irq_handler_tx_bare_locked(struct vc4_hdmi *vc4_hdmi)
2949 {
2950         u32 cntrl1;
2951
2952         /*
2953          * We don't need to protect the register access using
2954          * drm_dev_enter() there because the interrupt handler lifetime
2955          * is tied to the device itself, and not to the DRM device.
2956          *
2957          * So when the device will be gone, one of the first thing we
2958          * will be doing will be to unregister the interrupt handler,
2959          * and then unregister the DRM device. drm_dev_enter() would
2960          * thus always succeed if we are here.
2961          */
2962
2963         lockdep_assert_held(&vc4_hdmi->hw_lock);
2964
2965         cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
2966         vc4_hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD;
2967         cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
2968         HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
2969
2970         return IRQ_WAKE_THREAD;
2971 }
2972
2973 static irqreturn_t vc4_cec_irq_handler_tx_bare(int irq, void *priv)
2974 {
2975         struct vc4_hdmi *vc4_hdmi = priv;
2976         irqreturn_t ret;
2977
2978         spin_lock(&vc4_hdmi->hw_lock);
2979         ret = vc4_cec_irq_handler_tx_bare_locked(vc4_hdmi);
2980         spin_unlock(&vc4_hdmi->hw_lock);
2981
2982         return ret;
2983 }
2984
2985 static irqreturn_t vc4_cec_irq_handler_rx_bare_locked(struct vc4_hdmi *vc4_hdmi)
2986 {
2987         u32 cntrl1;
2988
2989         lockdep_assert_held(&vc4_hdmi->hw_lock);
2990
2991         /*
2992          * We don't need to protect the register access using
2993          * drm_dev_enter() there because the interrupt handler lifetime
2994          * is tied to the device itself, and not to the DRM device.
2995          *
2996          * So when the device will be gone, one of the first thing we
2997          * will be doing will be to unregister the interrupt handler,
2998          * and then unregister the DRM device. drm_dev_enter() would
2999          * thus always succeed if we are here.
3000          */
3001
3002         vc4_hdmi->cec_rx_msg.len = 0;
3003         cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
3004         vc4_cec_read_msg(vc4_hdmi, cntrl1);
3005         cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
3006         HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
3007         cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
3008
3009         HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
3010
3011         return IRQ_WAKE_THREAD;
3012 }
3013
3014 static irqreturn_t vc4_cec_irq_handler_rx_bare(int irq, void *priv)
3015 {
3016         struct vc4_hdmi *vc4_hdmi = priv;
3017         irqreturn_t ret;
3018
3019         spin_lock(&vc4_hdmi->hw_lock);
3020         ret = vc4_cec_irq_handler_rx_bare_locked(vc4_hdmi);
3021         spin_unlock(&vc4_hdmi->hw_lock);
3022
3023         return ret;
3024 }
3025
3026 static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
3027 {
3028         struct vc4_hdmi *vc4_hdmi = priv;
3029         u32 stat = HDMI_READ(HDMI_CEC_CPU_STATUS);
3030         irqreturn_t ret;
3031         u32 cntrl5;
3032
3033         /*
3034          * We don't need to protect the register access using
3035          * drm_dev_enter() there because the interrupt handler lifetime
3036          * is tied to the device itself, and not to the DRM device.
3037          *
3038          * So when the device will be gone, one of the first thing we
3039          * will be doing will be to unregister the interrupt handler,
3040          * and then unregister the DRM device. drm_dev_enter() would
3041          * thus always succeed if we are here.
3042          */
3043
3044         if (!(stat & VC4_HDMI_CPU_CEC))
3045                 return IRQ_NONE;
3046
3047         spin_lock(&vc4_hdmi->hw_lock);
3048         cntrl5 = HDMI_READ(HDMI_CEC_CNTRL_5);
3049         vc4_hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT;
3050         if (vc4_hdmi->cec_irq_was_rx)
3051                 ret = vc4_cec_irq_handler_rx_bare_locked(vc4_hdmi);
3052         else
3053                 ret = vc4_cec_irq_handler_tx_bare_locked(vc4_hdmi);
3054
3055         HDMI_WRITE(HDMI_CEC_CPU_CLEAR, VC4_HDMI_CPU_CEC);
3056         spin_unlock(&vc4_hdmi->hw_lock);
3057
3058         return ret;
3059 }
3060
3061 static int vc4_hdmi_cec_enable(struct cec_adapter *adap)
3062 {
3063         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
3064         struct drm_device *drm = vc4_hdmi->connector.dev;
3065         /* clock period in microseconds */
3066         const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
3067         unsigned long flags;
3068         u32 val;
3069         int ret;
3070         int idx;
3071
3072         if (!drm_dev_enter(drm, &idx))
3073                 /*
3074                  * We can't return an error code, because the CEC
3075                  * framework will emit WARN_ON messages at unbind
3076                  * otherwise.
3077                  */
3078                 return 0;
3079
3080         ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
3081         if (ret) {
3082                 drm_dev_exit(idx);
3083                 return ret;
3084         }
3085
3086         mutex_lock(&vc4_hdmi->mutex);
3087
3088         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
3089
3090         val = HDMI_READ(HDMI_CEC_CNTRL_5);
3091         val &= ~(VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET |
3092                  VC4_HDMI_CEC_CNT_TO_4700_US_MASK |
3093                  VC4_HDMI_CEC_CNT_TO_4500_US_MASK);
3094         val |= ((4700 / usecs) << VC4_HDMI_CEC_CNT_TO_4700_US_SHIFT) |
3095                ((4500 / usecs) << VC4_HDMI_CEC_CNT_TO_4500_US_SHIFT);
3096
3097         HDMI_WRITE(HDMI_CEC_CNTRL_5, val |
3098                    VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
3099         HDMI_WRITE(HDMI_CEC_CNTRL_5, val);
3100         HDMI_WRITE(HDMI_CEC_CNTRL_2,
3101                    ((1500 / usecs) << VC4_HDMI_CEC_CNT_TO_1500_US_SHIFT) |
3102                    ((1300 / usecs) << VC4_HDMI_CEC_CNT_TO_1300_US_SHIFT) |
3103                    ((800 / usecs) << VC4_HDMI_CEC_CNT_TO_800_US_SHIFT) |
3104                    ((600 / usecs) << VC4_HDMI_CEC_CNT_TO_600_US_SHIFT) |
3105                    ((400 / usecs) << VC4_HDMI_CEC_CNT_TO_400_US_SHIFT));
3106         HDMI_WRITE(HDMI_CEC_CNTRL_3,
3107                    ((2750 / usecs) << VC4_HDMI_CEC_CNT_TO_2750_US_SHIFT) |
3108                    ((2400 / usecs) << VC4_HDMI_CEC_CNT_TO_2400_US_SHIFT) |
3109                    ((2050 / usecs) << VC4_HDMI_CEC_CNT_TO_2050_US_SHIFT) |
3110                    ((1700 / usecs) << VC4_HDMI_CEC_CNT_TO_1700_US_SHIFT));
3111         HDMI_WRITE(HDMI_CEC_CNTRL_4,
3112                    ((4300 / usecs) << VC4_HDMI_CEC_CNT_TO_4300_US_SHIFT) |
3113                    ((3900 / usecs) << VC4_HDMI_CEC_CNT_TO_3900_US_SHIFT) |
3114                    ((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) |
3115                    ((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT));
3116
3117         if (!vc4_hdmi->variant->external_irq_controller)
3118                 HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
3119
3120         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
3121
3122         mutex_unlock(&vc4_hdmi->mutex);
3123         drm_dev_exit(idx);
3124
3125         return 0;
3126 }
3127
3128 static int vc4_hdmi_cec_disable(struct cec_adapter *adap)
3129 {
3130         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
3131         struct drm_device *drm = vc4_hdmi->connector.dev;
3132         unsigned long flags;
3133         int idx;
3134
3135         if (!drm_dev_enter(drm, &idx))
3136                 /*
3137                  * We can't return an error code, because the CEC
3138                  * framework will emit WARN_ON messages at unbind
3139                  * otherwise.
3140                  */
3141                 return 0;
3142
3143         mutex_lock(&vc4_hdmi->mutex);
3144
3145         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
3146
3147         if (!vc4_hdmi->variant->external_irq_controller)
3148                 HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
3149
3150         HDMI_WRITE(HDMI_CEC_CNTRL_5, HDMI_READ(HDMI_CEC_CNTRL_5) |
3151                    VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
3152
3153         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
3154
3155         mutex_unlock(&vc4_hdmi->mutex);
3156
3157         pm_runtime_put(&vc4_hdmi->pdev->dev);
3158
3159         drm_dev_exit(idx);
3160
3161         return 0;
3162 }
3163
3164 static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
3165 {
3166         if (enable)
3167                 return vc4_hdmi_cec_enable(adap);
3168         else
3169                 return vc4_hdmi_cec_disable(adap);
3170 }
3171
3172 static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
3173 {
3174         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
3175         struct drm_device *drm = vc4_hdmi->connector.dev;
3176         unsigned long flags;
3177         int idx;
3178
3179         if (!drm_dev_enter(drm, &idx))
3180                 /*
3181                  * We can't return an error code, because the CEC
3182                  * framework will emit WARN_ON messages at unbind
3183                  * otherwise.
3184                  */
3185                 return 0;
3186
3187         mutex_lock(&vc4_hdmi->mutex);
3188         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
3189         HDMI_WRITE(HDMI_CEC_CNTRL_1,
3190                    (HDMI_READ(HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) |
3191                    (log_addr & 0xf) << VC4_HDMI_CEC_ADDR_SHIFT);
3192         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
3193         mutex_unlock(&vc4_hdmi->mutex);
3194
3195         drm_dev_exit(idx);
3196
3197         return 0;
3198 }
3199
3200 static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
3201                                       u32 signal_free_time, struct cec_msg *msg)
3202 {
3203         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
3204         struct drm_device *dev = vc4_hdmi->connector.dev;
3205         unsigned long flags;
3206         u32 val;
3207         unsigned int i;
3208         int idx;
3209
3210         if (!drm_dev_enter(dev, &idx))
3211                 return -ENODEV;
3212
3213         if (msg->len > 16) {
3214                 drm_err(dev, "Attempting to transmit too much data (%d)\n", msg->len);
3215                 drm_dev_exit(idx);
3216                 return -ENOMEM;
3217         }
3218
3219         mutex_lock(&vc4_hdmi->mutex);
3220
3221         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
3222
3223         for (i = 0; i < msg->len; i += 4)
3224                 HDMI_WRITE(HDMI_CEC_TX_DATA_1 + (i >> 2),
3225                            (msg->msg[i]) |
3226                            (msg->msg[i + 1] << 8) |
3227                            (msg->msg[i + 2] << 16) |
3228                            (msg->msg[i + 3] << 24));
3229
3230         val = HDMI_READ(HDMI_CEC_CNTRL_1);
3231         val &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
3232         HDMI_WRITE(HDMI_CEC_CNTRL_1, val);
3233         val &= ~VC4_HDMI_CEC_MESSAGE_LENGTH_MASK;
3234         val |= (msg->len - 1) << VC4_HDMI_CEC_MESSAGE_LENGTH_SHIFT;
3235         val |= VC4_HDMI_CEC_START_XMIT_BEGIN;
3236
3237         HDMI_WRITE(HDMI_CEC_CNTRL_1, val);
3238
3239         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
3240         mutex_unlock(&vc4_hdmi->mutex);
3241         drm_dev_exit(idx);
3242
3243         return 0;
3244 }
3245
3246 static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = {
3247         .adap_enable = vc4_hdmi_cec_adap_enable,
3248         .adap_log_addr = vc4_hdmi_cec_adap_log_addr,
3249         .adap_transmit = vc4_hdmi_cec_adap_transmit,
3250 };
3251
3252 static void vc4_hdmi_cec_release(void *ptr)
3253 {
3254         struct vc4_hdmi *vc4_hdmi = ptr;
3255
3256         cec_unregister_adapter(vc4_hdmi->cec_adap);
3257         vc4_hdmi->cec_adap = NULL;
3258 }
3259
3260 static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
3261 {
3262         struct cec_connector_info conn_info;
3263         struct platform_device *pdev = vc4_hdmi->pdev;
3264         struct device *dev = &pdev->dev;
3265         int ret;
3266
3267         if (!of_property_present(dev->of_node, "interrupts")) {
3268                 dev_warn(dev, "'interrupts' DT property is missing, no CEC\n");
3269                 return 0;
3270         }
3271
3272         vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
3273                                                   vc4_hdmi,
3274                                                   vc4_hdmi->variant->card_name,
3275                                                   CEC_CAP_DEFAULTS |
3276                                                   CEC_CAP_CONNECTOR_INFO, 1);
3277         ret = PTR_ERR_OR_ZERO(vc4_hdmi->cec_adap);
3278         if (ret < 0)
3279                 return ret;
3280
3281         cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector);
3282         cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info);
3283
3284         if (vc4_hdmi->variant->external_irq_controller) {
3285                 ret = devm_request_threaded_irq(dev, platform_get_irq_byname(pdev, "cec-rx"),
3286                                                 vc4_cec_irq_handler_rx_bare,
3287                                                 vc4_cec_irq_handler_rx_thread, 0,
3288                                                 "vc4 hdmi cec rx", vc4_hdmi);
3289                 if (ret)
3290                         goto err_delete_cec_adap;
3291
3292                 ret = devm_request_threaded_irq(dev, platform_get_irq_byname(pdev, "cec-tx"),
3293                                                 vc4_cec_irq_handler_tx_bare,
3294                                                 vc4_cec_irq_handler_tx_thread, 0,
3295                                                 "vc4 hdmi cec tx", vc4_hdmi);
3296                 if (ret)
3297                         goto err_delete_cec_adap;
3298         } else {
3299                 ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
3300                                                 vc4_cec_irq_handler,
3301                                                 vc4_cec_irq_handler_thread, 0,
3302                                                 "vc4 hdmi cec", vc4_hdmi);
3303                 if (ret)
3304                         goto err_delete_cec_adap;
3305         }
3306
3307         ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev);
3308         if (ret < 0)
3309                 goto err_delete_cec_adap;
3310
3311         /*
3312          * NOTE: Strictly speaking, we should probably use a DRM-managed
3313          * registration there to avoid removing the CEC adapter by the
3314          * time the DRM driver doesn't have any user anymore.
3315          *
3316          * However, the CEC framework already cleans up the CEC adapter
3317          * only when the last user has closed its file descriptor, so we
3318          * don't need to handle it in DRM.
3319          *
3320          * By the time the device-managed hook is executed, we will give
3321          * up our reference to the CEC adapter and therefore don't
3322          * really care when it's actually freed.
3323          *
3324          * There's still a problematic sequence: if we unregister our
3325          * CEC adapter, but the userspace keeps a handle on the CEC
3326          * adapter but not the DRM device for some reason. In such a
3327          * case, our vc4_hdmi structure will be freed, but the
3328          * cec_adapter structure will have a dangling pointer to what
3329          * used to be our HDMI controller. If we get a CEC call at that
3330          * moment, we could end up with a use-after-free. Fortunately,
3331          * the CEC framework already handles this too, by calling
3332          * cec_is_registered() in cec_ioctl() and cec_poll().
3333          */
3334         ret = devm_add_action_or_reset(dev, vc4_hdmi_cec_release, vc4_hdmi);
3335         if (ret)
3336                 return ret;
3337
3338         return 0;
3339
3340 err_delete_cec_adap:
3341         cec_delete_adapter(vc4_hdmi->cec_adap);
3342
3343         return ret;
3344 }
3345 #else
3346 static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
3347 {
3348         return 0;
3349 }
3350 #endif
3351
3352 static void vc4_hdmi_free_regset(struct drm_device *drm, void *ptr)
3353 {
3354         struct debugfs_reg32 *regs = ptr;
3355
3356         kfree(regs);
3357 }
3358
3359 static int vc4_hdmi_build_regset(struct drm_device *drm,
3360                                  struct vc4_hdmi *vc4_hdmi,
3361                                  struct debugfs_regset32 *regset,
3362                                  enum vc4_hdmi_regs reg)
3363 {
3364         const struct vc4_hdmi_variant *variant = vc4_hdmi->variant;
3365         struct debugfs_reg32 *regs, *new_regs;
3366         unsigned int count = 0;
3367         unsigned int i;
3368         int ret;
3369
3370         regs = kcalloc(variant->num_registers, sizeof(*regs),
3371                        GFP_KERNEL);
3372         if (!regs)
3373                 return -ENOMEM;
3374
3375         for (i = 0; i < variant->num_registers; i++) {
3376                 const struct vc4_hdmi_register *field = &variant->registers[i];
3377
3378                 if (field->reg != reg)
3379                         continue;
3380
3381                 regs[count].name = field->name;
3382                 regs[count].offset = field->offset;
3383                 count++;
3384         }
3385
3386         new_regs = krealloc(regs, count * sizeof(*regs), GFP_KERNEL);
3387         if (!new_regs)
3388                 return -ENOMEM;
3389
3390         regset->base = __vc4_hdmi_get_field_base(vc4_hdmi, reg);
3391         regset->regs = new_regs;
3392         regset->nregs = count;
3393
3394         ret = drmm_add_action_or_reset(drm, vc4_hdmi_free_regset, new_regs);
3395         if (ret)
3396                 return ret;
3397
3398         return 0;
3399 }
3400
3401 static int vc4_hdmi_init_resources(struct drm_device *drm,
3402                                    struct vc4_hdmi *vc4_hdmi)
3403 {
3404         struct platform_device *pdev = vc4_hdmi->pdev;
3405         struct device *dev = &pdev->dev;
3406         int ret;
3407
3408         vc4_hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0);
3409         if (IS_ERR(vc4_hdmi->hdmicore_regs))
3410                 return PTR_ERR(vc4_hdmi->hdmicore_regs);
3411
3412         vc4_hdmi->hd_regs = vc4_ioremap_regs(pdev, 1);
3413         if (IS_ERR(vc4_hdmi->hd_regs))
3414                 return PTR_ERR(vc4_hdmi->hd_regs);
3415
3416         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->hd_regset, VC4_HD);
3417         if (ret)
3418                 return ret;
3419
3420         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->hdmi_regset, VC4_HDMI);
3421         if (ret)
3422                 return ret;
3423
3424         vc4_hdmi->pixel_clock = devm_clk_get(dev, "pixel");
3425         if (IS_ERR(vc4_hdmi->pixel_clock)) {
3426                 ret = PTR_ERR(vc4_hdmi->pixel_clock);
3427                 if (ret != -EPROBE_DEFER)
3428                         DRM_ERROR("Failed to get pixel clock\n");
3429                 return ret;
3430         }
3431
3432         vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
3433         if (IS_ERR(vc4_hdmi->hsm_clock)) {
3434                 DRM_ERROR("Failed to get HDMI state machine clock\n");
3435                 return PTR_ERR(vc4_hdmi->hsm_clock);
3436         }
3437         vc4_hdmi->audio_clock = vc4_hdmi->hsm_clock;
3438         vc4_hdmi->cec_clock = vc4_hdmi->hsm_clock;
3439
3440         return 0;
3441 }
3442
3443 static int vc5_hdmi_init_resources(struct drm_device *drm,
3444                                    struct vc4_hdmi *vc4_hdmi)
3445 {
3446         struct platform_device *pdev = vc4_hdmi->pdev;
3447         struct device *dev = &pdev->dev;
3448         struct resource *res;
3449         int ret;
3450
3451         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi");
3452         if (!res)
3453                 return -ENODEV;
3454
3455         vc4_hdmi->hdmicore_regs = devm_ioremap(dev, res->start,
3456                                                resource_size(res));
3457         if (!vc4_hdmi->hdmicore_regs)
3458                 return -ENOMEM;
3459
3460         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hd");
3461         if (!res)
3462                 return -ENODEV;
3463
3464         vc4_hdmi->hd_regs = devm_ioremap(dev, res->start, resource_size(res));
3465         if (!vc4_hdmi->hd_regs)
3466                 return -ENOMEM;
3467
3468         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cec");
3469         if (!res)
3470                 return -ENODEV;
3471
3472         vc4_hdmi->cec_regs = devm_ioremap(dev, res->start, resource_size(res));
3473         if (!vc4_hdmi->cec_regs)
3474                 return -ENOMEM;
3475
3476         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csc");
3477         if (!res)
3478                 return -ENODEV;
3479
3480         vc4_hdmi->csc_regs = devm_ioremap(dev, res->start, resource_size(res));
3481         if (!vc4_hdmi->csc_regs)
3482                 return -ENOMEM;
3483
3484         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvp");
3485         if (!res)
3486                 return -ENODEV;
3487
3488         vc4_hdmi->dvp_regs = devm_ioremap(dev, res->start, resource_size(res));
3489         if (!vc4_hdmi->dvp_regs)
3490                 return -ENOMEM;
3491
3492         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
3493         if (!res)
3494                 return -ENODEV;
3495
3496         vc4_hdmi->phy_regs = devm_ioremap(dev, res->start, resource_size(res));
3497         if (!vc4_hdmi->phy_regs)
3498                 return -ENOMEM;
3499
3500         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "packet");
3501         if (!res)
3502                 return -ENODEV;
3503
3504         vc4_hdmi->ram_regs = devm_ioremap(dev, res->start, resource_size(res));
3505         if (!vc4_hdmi->ram_regs)
3506                 return -ENOMEM;
3507
3508         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rm");
3509         if (!res)
3510                 return -ENODEV;
3511
3512         vc4_hdmi->rm_regs = devm_ioremap(dev, res->start, resource_size(res));
3513         if (!vc4_hdmi->rm_regs)
3514                 return -ENOMEM;
3515
3516         vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
3517         if (IS_ERR(vc4_hdmi->hsm_clock)) {
3518                 DRM_ERROR("Failed to get HDMI state machine clock\n");
3519                 return PTR_ERR(vc4_hdmi->hsm_clock);
3520         }
3521
3522         vc4_hdmi->pixel_bvb_clock = devm_clk_get(dev, "bvb");
3523         if (IS_ERR(vc4_hdmi->pixel_bvb_clock)) {
3524                 DRM_ERROR("Failed to get pixel bvb clock\n");
3525                 return PTR_ERR(vc4_hdmi->pixel_bvb_clock);
3526         }
3527
3528         vc4_hdmi->audio_clock = devm_clk_get(dev, "audio");
3529         if (IS_ERR(vc4_hdmi->audio_clock)) {
3530                 DRM_ERROR("Failed to get audio clock\n");
3531                 return PTR_ERR(vc4_hdmi->audio_clock);
3532         }
3533
3534         vc4_hdmi->cec_clock = devm_clk_get(dev, "cec");
3535         if (IS_ERR(vc4_hdmi->cec_clock)) {
3536                 DRM_ERROR("Failed to get CEC clock\n");
3537                 return PTR_ERR(vc4_hdmi->cec_clock);
3538         }
3539
3540         vc4_hdmi->reset = devm_reset_control_get(dev, NULL);
3541         if (IS_ERR(vc4_hdmi->reset)) {
3542                 DRM_ERROR("Failed to get HDMI reset line\n");
3543                 return PTR_ERR(vc4_hdmi->reset);
3544         }
3545
3546         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->hdmi_regset, VC4_HDMI);
3547         if (ret)
3548                 return ret;
3549
3550         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->hd_regset, VC4_HD);
3551         if (ret)
3552                 return ret;
3553
3554         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->cec_regset, VC5_CEC);
3555         if (ret)
3556                 return ret;
3557
3558         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->csc_regset, VC5_CSC);
3559         if (ret)
3560                 return ret;
3561
3562         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->dvp_regset, VC5_DVP);
3563         if (ret)
3564                 return ret;
3565
3566         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->phy_regset, VC5_PHY);
3567         if (ret)
3568                 return ret;
3569
3570         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->ram_regset, VC5_RAM);
3571         if (ret)
3572                 return ret;
3573
3574         ret = vc4_hdmi_build_regset(drm, vc4_hdmi, &vc4_hdmi->rm_regset, VC5_RM);
3575         if (ret)
3576                 return ret;
3577
3578         return 0;
3579 }
3580
3581 static int vc4_hdmi_runtime_suspend(struct device *dev)
3582 {
3583         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
3584
3585         clk_disable_unprepare(vc4_hdmi->hsm_clock);
3586
3587         return 0;
3588 }
3589
3590 static int vc4_hdmi_runtime_resume(struct device *dev)
3591 {
3592         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
3593         unsigned long __maybe_unused flags;
3594         u32 __maybe_unused value;
3595         unsigned long rate;
3596         int ret;
3597
3598         ret = clk_prepare_enable(vc4_hdmi->hsm_clock);
3599         if (ret)
3600                 return ret;
3601
3602         /*
3603          * Whenever the RaspberryPi boots without an HDMI monitor
3604          * plugged in, the firmware won't have initialized the HSM clock
3605          * rate and it will be reported as 0.
3606          *
3607          * If we try to access a register of the controller in such a
3608          * case, it will lead to a silent CPU stall. Let's make sure we
3609          * prevent such a case.
3610          */
3611         rate = clk_get_rate(vc4_hdmi->hsm_clock);
3612         if (!rate) {
3613                 ret = -EINVAL;
3614                 goto err_disable_clk;
3615         }
3616
3617         if (vc4_hdmi->variant->reset)
3618                 vc4_hdmi->variant->reset(vc4_hdmi);
3619
3620 #ifdef CONFIG_DRM_VC4_HDMI_CEC
3621         spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
3622         value = HDMI_READ(HDMI_CEC_CNTRL_1);
3623         /* Set the logical address to Unregistered */
3624         value |= VC4_HDMI_CEC_ADDR_MASK;
3625         HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
3626         spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
3627
3628         vc4_hdmi_cec_update_clk_div(vc4_hdmi);
3629
3630         if (!vc4_hdmi->variant->external_irq_controller) {
3631                 spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
3632                 HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
3633                 spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
3634         }
3635 #endif
3636
3637         return 0;
3638
3639 err_disable_clk:
3640         clk_disable_unprepare(vc4_hdmi->hsm_clock);
3641         return ret;
3642 }
3643
3644 static void vc4_hdmi_put_ddc_device(void *ptr)
3645 {
3646         struct vc4_hdmi *vc4_hdmi = ptr;
3647
3648         put_device(&vc4_hdmi->ddc->dev);
3649 }
3650
3651 static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
3652 {
3653         const struct vc4_hdmi_variant *variant = of_device_get_match_data(dev);
3654         struct platform_device *pdev = to_platform_device(dev);
3655         struct drm_device *drm = dev_get_drvdata(master);
3656         struct vc4_hdmi *vc4_hdmi;
3657         struct drm_encoder *encoder;
3658         struct device_node *ddc_node;
3659         int ret;
3660
3661         vc4_hdmi = drmm_kzalloc(drm, sizeof(*vc4_hdmi), GFP_KERNEL);
3662         if (!vc4_hdmi)
3663                 return -ENOMEM;
3664
3665         ret = drmm_mutex_init(drm, &vc4_hdmi->mutex);
3666         if (ret)
3667                 return ret;
3668
3669         spin_lock_init(&vc4_hdmi->hw_lock);
3670         INIT_DELAYED_WORK(&vc4_hdmi->scrambling_work, vc4_hdmi_scrambling_wq);
3671
3672         dev_set_drvdata(dev, vc4_hdmi);
3673         encoder = &vc4_hdmi->encoder.base;
3674         vc4_hdmi->encoder.type = variant->encoder_type;
3675         vc4_hdmi->encoder.pre_crtc_configure = vc4_hdmi_encoder_pre_crtc_configure;
3676         vc4_hdmi->encoder.pre_crtc_enable = vc4_hdmi_encoder_pre_crtc_enable;
3677         vc4_hdmi->encoder.post_crtc_enable = vc4_hdmi_encoder_post_crtc_enable;
3678         vc4_hdmi->encoder.post_crtc_disable = vc4_hdmi_encoder_post_crtc_disable;
3679         vc4_hdmi->encoder.post_crtc_powerdown = vc4_hdmi_encoder_post_crtc_powerdown;
3680         vc4_hdmi->pdev = pdev;
3681         vc4_hdmi->variant = variant;
3682
3683         /*
3684          * Since we don't know the state of the controller and its
3685          * display (if any), let's assume it's always enabled.
3686          * vc4_hdmi_disable_scrambling() will thus run at boot, make
3687          * sure it's disabled, and avoid any inconsistency.
3688          */
3689         if (variant->max_pixel_clock > HDMI_14_MAX_TMDS_CLK)
3690                 vc4_hdmi->scdc_enabled = true;
3691
3692         ret = variant->init_resources(drm, vc4_hdmi);
3693         if (ret)
3694                 return ret;
3695
3696         ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
3697         if (!ddc_node) {
3698                 DRM_ERROR("Failed to find ddc node in device tree\n");
3699                 return -ENODEV;
3700         }
3701
3702         vc4_hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
3703         of_node_put(ddc_node);
3704         if (!vc4_hdmi->ddc) {
3705                 DRM_DEBUG("Failed to get ddc i2c adapter by node\n");
3706                 return -EPROBE_DEFER;
3707         }
3708
3709         ret = devm_add_action_or_reset(dev, vc4_hdmi_put_ddc_device, vc4_hdmi);
3710         if (ret)
3711                 return ret;
3712
3713         /* Only use the GPIO HPD pin if present in the DT, otherwise
3714          * we'll use the HDMI core's register.
3715          */
3716         vc4_hdmi->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
3717         if (IS_ERR(vc4_hdmi->hpd_gpio)) {
3718                 return PTR_ERR(vc4_hdmi->hpd_gpio);
3719         }
3720
3721         vc4_hdmi->disable_wifi_frequencies =
3722                 of_property_read_bool(dev->of_node, "wifi-2.4ghz-coexistence");
3723
3724         ret = devm_pm_runtime_enable(dev);
3725         if (ret)
3726                 return ret;
3727
3728         /*
3729          *  We need to have the device powered up at this point to call
3730          *  our reset hook and for the CEC init.
3731          */
3732         ret = pm_runtime_resume_and_get(dev);
3733         if (ret)
3734                 return ret;
3735
3736         if ((of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi0") ||
3737              of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi1")) &&
3738             HDMI_READ(HDMI_VID_CTL) & VC4_HD_VID_CTL_ENABLE) {
3739                 clk_prepare_enable(vc4_hdmi->pixel_clock);
3740                 clk_prepare_enable(vc4_hdmi->hsm_clock);
3741                 clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
3742         }
3743
3744         ret = drmm_encoder_init(drm, encoder,
3745                                 &vc4_hdmi_encoder_funcs,
3746                                 DRM_MODE_ENCODER_TMDS,
3747                                 NULL);
3748         if (ret)
3749                 goto err_put_runtime_pm;
3750
3751         drm_encoder_helper_add(encoder, &vc4_hdmi_encoder_helper_funcs);
3752
3753         ret = vc4_hdmi_connector_init(drm, vc4_hdmi);
3754         if (ret)
3755                 goto err_put_runtime_pm;
3756
3757         ret = vc4_hdmi_hotplug_init(vc4_hdmi);
3758         if (ret)
3759                 goto err_put_runtime_pm;
3760
3761         ret = vc4_hdmi_cec_init(vc4_hdmi);
3762         if (ret)
3763                 goto err_put_runtime_pm;
3764
3765         ret = vc4_hdmi_audio_init(vc4_hdmi);
3766         if (ret)
3767                 goto err_put_runtime_pm;
3768
3769         pm_runtime_put_sync(dev);
3770
3771         return 0;
3772
3773 err_put_runtime_pm:
3774         pm_runtime_put_sync(dev);
3775
3776         return ret;
3777 }
3778
3779 static const struct component_ops vc4_hdmi_ops = {
3780         .bind   = vc4_hdmi_bind,
3781 };
3782
3783 static int vc4_hdmi_dev_probe(struct platform_device *pdev)
3784 {
3785         return component_add(&pdev->dev, &vc4_hdmi_ops);
3786 }
3787
3788 static void vc4_hdmi_dev_remove(struct platform_device *pdev)
3789 {
3790         component_del(&pdev->dev, &vc4_hdmi_ops);
3791 }
3792
3793 static const struct vc4_hdmi_variant bcm2835_variant = {
3794         .encoder_type           = VC4_ENCODER_TYPE_HDMI0,
3795         .debugfs_name           = "hdmi_regs",
3796         .card_name              = "vc4-hdmi",
3797         .max_pixel_clock        = 162000000,
3798         .registers              = vc4_hdmi_fields,
3799         .num_registers          = ARRAY_SIZE(vc4_hdmi_fields),
3800
3801         .init_resources         = vc4_hdmi_init_resources,
3802         .csc_setup              = vc4_hdmi_csc_setup,
3803         .reset                  = vc4_hdmi_reset,
3804         .set_timings            = vc4_hdmi_set_timings,
3805         .phy_init               = vc4_hdmi_phy_init,
3806         .phy_disable            = vc4_hdmi_phy_disable,
3807         .phy_rng_enable         = vc4_hdmi_phy_rng_enable,
3808         .phy_rng_disable        = vc4_hdmi_phy_rng_disable,
3809         .channel_map            = vc4_hdmi_channel_map,
3810         .supports_hdr           = false,
3811 };
3812
3813 static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
3814         .encoder_type           = VC4_ENCODER_TYPE_HDMI0,
3815         .debugfs_name           = "hdmi0_regs",
3816         .card_name              = "vc4-hdmi-0",
3817         .max_pixel_clock        = 600000000,
3818         .registers              = vc5_hdmi_hdmi0_fields,
3819         .num_registers          = ARRAY_SIZE(vc5_hdmi_hdmi0_fields),
3820         .phy_lane_mapping       = {
3821                 PHY_LANE_0,
3822                 PHY_LANE_1,
3823                 PHY_LANE_2,
3824                 PHY_LANE_CK,
3825         },
3826         .unsupported_odd_h_timings      = true,
3827         .external_irq_controller        = true,
3828
3829         .init_resources         = vc5_hdmi_init_resources,
3830         .csc_setup              = vc5_hdmi_csc_setup,
3831         .reset                  = vc5_hdmi_reset,
3832         .set_timings            = vc5_hdmi_set_timings,
3833         .phy_init               = vc5_hdmi_phy_init,
3834         .phy_disable            = vc5_hdmi_phy_disable,
3835         .phy_rng_enable         = vc5_hdmi_phy_rng_enable,
3836         .phy_rng_disable        = vc5_hdmi_phy_rng_disable,
3837         .channel_map            = vc5_hdmi_channel_map,
3838         .supports_hdr           = true,
3839         .hp_detect              = vc5_hdmi_hp_detect,
3840 };
3841
3842 static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
3843         .encoder_type           = VC4_ENCODER_TYPE_HDMI1,
3844         .debugfs_name           = "hdmi1_regs",
3845         .card_name              = "vc4-hdmi-1",
3846         .max_pixel_clock        = HDMI_14_MAX_TMDS_CLK,
3847         .registers              = vc5_hdmi_hdmi1_fields,
3848         .num_registers          = ARRAY_SIZE(vc5_hdmi_hdmi1_fields),
3849         .phy_lane_mapping       = {
3850                 PHY_LANE_1,
3851                 PHY_LANE_0,
3852                 PHY_LANE_CK,
3853                 PHY_LANE_2,
3854         },
3855         .unsupported_odd_h_timings      = true,
3856         .external_irq_controller        = true,
3857
3858         .init_resources         = vc5_hdmi_init_resources,
3859         .csc_setup              = vc5_hdmi_csc_setup,
3860         .reset                  = vc5_hdmi_reset,
3861         .set_timings            = vc5_hdmi_set_timings,
3862         .phy_init               = vc5_hdmi_phy_init,
3863         .phy_disable            = vc5_hdmi_phy_disable,
3864         .phy_rng_enable         = vc5_hdmi_phy_rng_enable,
3865         .phy_rng_disable        = vc5_hdmi_phy_rng_disable,
3866         .channel_map            = vc5_hdmi_channel_map,
3867         .supports_hdr           = true,
3868         .hp_detect              = vc5_hdmi_hp_detect,
3869 };
3870
3871 static const struct of_device_id vc4_hdmi_dt_match[] = {
3872         { .compatible = "brcm,bcm2835-hdmi", .data = &bcm2835_variant },
3873         { .compatible = "brcm,bcm2711-hdmi0", .data = &bcm2711_hdmi0_variant },
3874         { .compatible = "brcm,bcm2711-hdmi1", .data = &bcm2711_hdmi1_variant },
3875         {}
3876 };
3877
3878 static const struct dev_pm_ops vc4_hdmi_pm_ops = {
3879         SET_RUNTIME_PM_OPS(vc4_hdmi_runtime_suspend,
3880                            vc4_hdmi_runtime_resume,
3881                            NULL)
3882 };
3883
3884 struct platform_driver vc4_hdmi_driver = {
3885         .probe = vc4_hdmi_dev_probe,
3886         .remove_new = vc4_hdmi_dev_remove,
3887         .driver = {
3888                 .name = "vc4_hdmi",
3889                 .of_match_table = vc4_hdmi_dt_match,
3890                 .pm = &vc4_hdmi_pm_ops,
3891         },
3892 };