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/drm_atomic_helper.h>
  35 #include <drm/drm_edid.h>
  36 #include <drm/drm_probe_helper.h>
  37 #include <drm/drm_simple_kms_helper.h>
  38 #include <drm/drm_scdc_helper.h>
  39 #include <linux/clk.h>
  40 #include <linux/component.h>
  41 #include <linux/i2c.h>
  42 #include <linux/of_address.h>
  43 #include <linux/of_gpio.h>
  44 #include <linux/of_platform.h>
  45 #include <linux/pm_runtime.h>
  46 #include <linux/rational.h>
  47 #include <linux/reset.h>
  48 #include <sound/dmaengine_pcm.h>
  49 #include <sound/pcm_drm_eld.h>
  50 #include <sound/pcm_params.h>
  51 #include <sound/soc.h>
  52 #include "media/cec.h"
  53 #include "vc4_drv.h"
  54 #include "vc4_hdmi.h"
  55 #include "vc4_hdmi_regs.h"
  56 #include "vc4_regs.h"
  57
  58 #define VC5_HDMI_HORZA_HFP_SHIFT                16
  59 #define VC5_HDMI_HORZA_HFP_MASK                 VC4_MASK(28, 16)
  60 #define VC5_HDMI_HORZA_VPOS                     BIT(15)
  61 #define VC5_HDMI_HORZA_HPOS                     BIT(14)
  62 #define VC5_HDMI_HORZA_HAP_SHIFT                0
  63 #define VC5_HDMI_HORZA_HAP_MASK                 VC4_MASK(13, 0)
  64
  65 #define VC5_HDMI_HORZB_HBP_SHIFT                16
  66 #define VC5_HDMI_HORZB_HBP_MASK                 VC4_MASK(26, 16)
  67 #define VC5_HDMI_HORZB_HSP_SHIFT                0
  68 #define VC5_HDMI_HORZB_HSP_MASK                 VC4_MASK(10, 0)
  69
  70 #define VC5_HDMI_VERTA_VSP_SHIFT                24
  71 #define VC5_HDMI_VERTA_VSP_MASK                 VC4_MASK(28, 24)
  72 #define VC5_HDMI_VERTA_VFP_SHIFT                16
  73 #define VC5_HDMI_VERTA_VFP_MASK                 VC4_MASK(22, 16)
  74 #define VC5_HDMI_VERTA_VAL_SHIFT                0
  75 #define VC5_HDMI_VERTA_VAL_MASK                 VC4_MASK(12, 0)
  76
  77 #define VC5_HDMI_VERTB_VSPO_SHIFT               16
  78 #define VC5_HDMI_VERTB_VSPO_MASK                VC4_MASK(29, 16)
  79
  80 #define VC5_HDMI_SCRAMBLER_CTL_ENABLE           BIT(0)
  81
  82 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_SHIFT      8
  83 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK       VC4_MASK(10, 8)
  84
  85 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_SHIFT          0
  86 #define VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_MASK           VC4_MASK(3, 0)
  87
  88 #define VC5_HDMI_GCP_CONFIG_GCP_ENABLE          BIT(31)
  89
  90 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_SHIFT  8
  91 #define VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_MASK   VC4_MASK(15, 8)
  92
  93 # define VC4_HD_M_SW_RST                        BIT(2)
  94 # define VC4_HD_M_ENABLE                        BIT(0)
  95
  96 #define CEC_CLOCK_FREQ 40000
  97
  98 #define HDMI_14_MAX_TMDS_CLK   (340 * 1000 * 1000)
  99
 100 static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode)
 101 {
 102         return (mode->clock * 1000) > HDMI_14_MAX_TMDS_CLK;
 103 }
 104
 105 static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
 106 {
 107         struct drm_info_node *node = (struct drm_info_node *)m->private;
 108         struct vc4_hdmi *vc4_hdmi = node->info_ent->data;
 109         struct drm_printer p = drm_seq_file_printer(m);
 110
 111         drm_print_regset32(&p, &vc4_hdmi->hdmi_regset);
 112         drm_print_regset32(&p, &vc4_hdmi->hd_regset);
 113
 114         return 0;
 115 }
 116
 117 static void vc4_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
 118 {
 119         HDMI_WRITE(HDMI_M_CTL, VC4_HD_M_SW_RST);
 120         udelay(1);
 121         HDMI_WRITE(HDMI_M_CTL, 0);
 122
 123         HDMI_WRITE(HDMI_M_CTL, VC4_HD_M_ENABLE);
 124
 125         HDMI_WRITE(HDMI_SW_RESET_CONTROL,
 126                    VC4_HDMI_SW_RESET_HDMI |
 127                    VC4_HDMI_SW_RESET_FORMAT_DETECT);
 128
 129         HDMI_WRITE(HDMI_SW_RESET_CONTROL, 0);
 130 }
 131
 132 static void vc5_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
 133 {
 134         reset_control_reset(vc4_hdmi->reset);
 135
 136         HDMI_WRITE(HDMI_DVP_CTL, 0);
 137
 138         HDMI_WRITE(HDMI_CLOCK_STOP,
 139                    HDMI_READ(HDMI_CLOCK_STOP) | VC4_DVP_HT_CLOCK_STOP_PIXEL);
 140 }
 141
 142 #ifdef CONFIG_DRM_VC4_HDMI_CEC
 143 static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi)
 144 {
 145         u16 clk_cnt;
 146         u32 value;
 147
 148         value = HDMI_READ(HDMI_CEC_CNTRL_1);
 149         value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK;
 150
 151         /*
 152          * Set the clock divider: the hsm_clock rate and this divider
 153          * setting will give a 40 kHz CEC clock.
 154          */
 155         clk_cnt = clk_get_rate(vc4_hdmi->cec_clock) / CEC_CLOCK_FREQ;
 156         value |= clk_cnt << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT;
 157         HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
 158 }
 159 #else
 160 static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) {}
 161 #endif
 162
 163 static enum drm_connector_status
 164 vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
 165 {
 166         struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
 167         bool connected = false;
 168
 169         WARN_ON(pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev));
 170
 171         if (vc4_hdmi->hpd_gpio &&
 172             gpiod_get_value_cansleep(vc4_hdmi->hpd_gpio)) {
 173                 connected = true;
 174         } else if (drm_probe_ddc(vc4_hdmi->ddc)) {
 175                 connected = true;
 176         } else if (HDMI_READ(HDMI_HOTPLUG) & VC4_HDMI_HOTPLUG_CONNECTED) {
 177                 connected = true;
 178         }
 179
 180         if (connected) {
 181                 if (connector->status != connector_status_connected) {
 182                         struct edid *edid = drm_get_edid(connector, vc4_hdmi->ddc);
 183
 184                         if (edid) {
 185                                 cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
 186                                 vc4_hdmi->encoder.hdmi_monitor = drm_detect_hdmi_monitor(edid);
 187                                 kfree(edid);
 188                         }
 189                 }
 190
 191                 pm_runtime_put(&vc4_hdmi->pdev->dev);
 192                 return connector_status_connected;
 193         }
 194
 195         cec_phys_addr_invalidate(vc4_hdmi->cec_adap);
 196         pm_runtime_put(&vc4_hdmi->pdev->dev);
 197         return connector_status_disconnected;
 198 }
 199
 200 static void vc4_hdmi_connector_destroy(struct drm_connector *connector)
 201 {
 202         drm_connector_unregister(connector);
 203         drm_connector_cleanup(connector);
 204 }
 205
 206 static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
 207 {
 208         struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
 209         struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
 210         int ret = 0;
 211         struct edid *edid;
 212
 213         edid = drm_get_edid(connector, vc4_hdmi->ddc);
 214         cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
 215         if (!edid)
 216                 return -ENODEV;
 217
 218         vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
 219
 220         drm_connector_update_edid_property(connector, edid);
 221         ret = drm_add_edid_modes(connector, edid);
 222         kfree(edid);
 223
 224         if (vc4_hdmi->disable_4kp60) {
 225                 struct drm_device *drm = connector->dev;
 226                 struct drm_display_mode *mode;
 227
 228                 list_for_each_entry(mode, &connector->probed_modes, head) {
 229                         if (vc4_hdmi_mode_needs_scrambling(mode)) {
 230                                 drm_warn_once(drm, "The core clock cannot reach frequencies high enough to support 4k @ 60Hz.");
 231                                 drm_warn_once(drm, "Please change your config.txt file to add hdmi_enable_4kp60.");
 232                         }
 233                 }
 234         }
 235
 236         return ret;
 237 }
 238
 239 static int vc4_hdmi_connector_atomic_check(struct drm_connector *connector,
 240                                            struct drm_atomic_state *state)
 241 {
 242         struct drm_connector_state *old_state =
 243                 drm_atomic_get_old_connector_state(state, connector);
 244         struct drm_connector_state *new_state =
 245                 drm_atomic_get_new_connector_state(state, connector);
 246         struct drm_crtc *crtc = new_state->crtc;
 247
 248         if (!crtc)
 249                 return 0;
 250
 251         if (old_state->colorspace != new_state->colorspace ||
 252             !drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
 253                 struct drm_crtc_state *crtc_state;
 254
 255                 crtc_state = drm_atomic_get_crtc_state(state, crtc);
 256                 if (IS_ERR(crtc_state))
 257                         return PTR_ERR(crtc_state);
 258
 259                 crtc_state->mode_changed = true;
 260         }
 261
 262         return 0;
 263 }
 264
 265 static void vc4_hdmi_connector_reset(struct drm_connector *connector)
 266 {
 267         struct vc4_hdmi_connector_state *old_state =
 268                 conn_state_to_vc4_hdmi_conn_state(connector->state);
 269         struct vc4_hdmi_connector_state *new_state =
 270                 kzalloc(sizeof(*new_state), GFP_KERNEL);
 271
 272         if (connector->state)
 273                 __drm_atomic_helper_connector_destroy_state(connector->state);
 274
 275         kfree(old_state);
 276         __drm_atomic_helper_connector_reset(connector, &new_state->base);
 277
 278         if (!new_state)
 279                 return;
 280
 281         new_state->base.max_bpc = 8;
 282         new_state->base.max_requested_bpc = 8;
 283         drm_atomic_helper_connector_tv_reset(connector);
 284 }
 285
 286 static struct drm_connector_state *
 287 vc4_hdmi_connector_duplicate_state(struct drm_connector *connector)
 288 {
 289         struct drm_connector_state *conn_state = connector->state;
 290         struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state);
 291         struct vc4_hdmi_connector_state *new_state;
 292
 293         new_state = kzalloc(sizeof(*new_state), GFP_KERNEL);
 294         if (!new_state)
 295                 return NULL;
 296
 297         new_state->pixel_rate = vc4_state->pixel_rate;
 298         __drm_atomic_helper_connector_duplicate_state(connector, &new_state->base);
 299
 300         return &new_state->base;
 301 }
 302
 303 static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
 304         .detect = vc4_hdmi_connector_detect,
 305         .fill_modes = drm_helper_probe_single_connector_modes,
 306         .destroy = vc4_hdmi_connector_destroy,
 307         .reset = vc4_hdmi_connector_reset,
 308         .atomic_duplicate_state = vc4_hdmi_connector_duplicate_state,
 309         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 310 };
 311
 312 static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs = {
 313         .get_modes = vc4_hdmi_connector_get_modes,
 314         .atomic_check = vc4_hdmi_connector_atomic_check,
 315 };
 316
 317 static int vc4_hdmi_connector_init(struct drm_device *dev,
 318                                    struct vc4_hdmi *vc4_hdmi)
 319 {
 320         struct drm_connector *connector = &vc4_hdmi->connector;
 321         struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
 322         int ret;
 323
 324         drm_connector_init_with_ddc(dev, connector,
 325                                     &vc4_hdmi_connector_funcs,
 326                                     DRM_MODE_CONNECTOR_HDMIA,
 327                                     vc4_hdmi->ddc);
 328         drm_connector_helper_add(connector, &vc4_hdmi_connector_helper_funcs);
 329
 330         /*
 331          * Some of the properties below require access to state, like bpc.
 332          * Allocate some default initial connector state with our reset helper.
 333          */
 334         if (connector->funcs->reset)
 335                 connector->funcs->reset(connector);
 336
 337         /* Create and attach TV margin props to this connector. */
 338         ret = drm_mode_create_tv_margin_properties(dev);
 339         if (ret)
 340                 return ret;
 341
 342         ret = drm_mode_create_hdmi_colorspace_property(connector);
 343         if (ret)
 344                 return ret;
 345
 346         drm_connector_attach_colorspace_property(connector);
 347         drm_connector_attach_tv_margin_properties(connector);
 348         drm_connector_attach_max_bpc_property(connector, 8, 12);
 349
 350         connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
 351                              DRM_CONNECTOR_POLL_DISCONNECT);
 352
 353         connector->interlace_allowed = 1;
 354         connector->doublescan_allowed = 0;
 355
 356         if (vc4_hdmi->variant->supports_hdr)
 357                 drm_connector_attach_hdr_output_metadata_property(connector);
 358
 359         drm_connector_attach_encoder(connector, encoder);
 360
 361         return 0;
 362 }
 363
 364 static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
 365                                 enum hdmi_infoframe_type type,
 366                                 bool poll)
 367 {
 368         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 369         u32 packet_id = type - 0x80;
 370
 371         HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
 372                    HDMI_READ(HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
 373
 374         if (!poll)
 375                 return 0;
 376
 377         return wait_for(!(HDMI_READ(HDMI_RAM_PACKET_STATUS) &
 378                           BIT(packet_id)), 100);
 379 }
 380
 381 static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
 382                                      union hdmi_infoframe *frame)
 383 {
 384         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 385         u32 packet_id = frame->any.type - 0x80;
 386         const struct vc4_hdmi_register *ram_packet_start =
 387                 &vc4_hdmi->variant->registers[HDMI_RAM_PACKET_START];
 388         u32 packet_reg = ram_packet_start->offset + VC4_HDMI_PACKET_STRIDE * packet_id;
 389         void __iomem *base = __vc4_hdmi_get_field_base(vc4_hdmi,
 390                                                        ram_packet_start->reg);
 391         uint8_t buffer[VC4_HDMI_PACKET_STRIDE];
 392         ssize_t len, i;
 393         int ret;
 394
 395         WARN_ONCE(!(HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
 396                     VC4_HDMI_RAM_PACKET_ENABLE),
 397                   "Packet RAM has to be on to store the packet.");
 398
 399         len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
 400         if (len < 0)
 401                 return;
 402
 403         ret = vc4_hdmi_stop_packet(encoder, frame->any.type, true);
 404         if (ret) {
 405                 DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
 406                 return;
 407         }
 408
 409         for (i = 0; i < len; i += 7) {
 410                 writel(buffer[i + 0] << 0 |
 411                        buffer[i + 1] << 8 |
 412                        buffer[i + 2] << 16,
 413                        base + packet_reg);
 414                 packet_reg += 4;
 415
 416                 writel(buffer[i + 3] << 0 |
 417                        buffer[i + 4] << 8 |
 418                        buffer[i + 5] << 16 |
 419                        buffer[i + 6] << 24,
 420                        base + packet_reg);
 421                 packet_reg += 4;
 422         }
 423
 424         HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
 425                    HDMI_READ(HDMI_RAM_PACKET_CONFIG) | BIT(packet_id));
 426         ret = wait_for((HDMI_READ(HDMI_RAM_PACKET_STATUS) &
 427                         BIT(packet_id)), 100);
 428         if (ret)
 429                 DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
 430 }
 431
 432 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 433 {
 434         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 435         struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 436         struct drm_connector *connector = &vc4_hdmi->connector;
 437         struct drm_connector_state *cstate = connector->state;
 438         struct drm_crtc *crtc = encoder->crtc;
 439         const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 440         union hdmi_infoframe frame;
 441         int ret;
 442
 443         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
 444                                                        connector, mode);
 445         if (ret < 0) {
 446                 DRM_ERROR("couldn't fill AVI infoframe\n");
 447                 return;
 448         }
 449
 450         drm_hdmi_avi_infoframe_quant_range(&frame.avi,
 451                                            connector, mode,
 452                                            vc4_encoder->limited_rgb_range ?
 453                                            HDMI_QUANTIZATION_RANGE_LIMITED :
 454                                            HDMI_QUANTIZATION_RANGE_FULL);
 455         drm_hdmi_avi_infoframe_colorspace(&frame.avi, cstate);
 456         drm_hdmi_avi_infoframe_bars(&frame.avi, cstate);
 457
 458         vc4_hdmi_write_infoframe(encoder, &frame);
 459 }
 460
 461 static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
 462 {
 463         union hdmi_infoframe frame;
 464         int ret;
 465
 466         ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore");
 467         if (ret < 0) {
 468                 DRM_ERROR("couldn't fill SPD infoframe\n");
 469                 return;
 470         }
 471
 472         frame.spd.sdi = HDMI_SPD_SDI_PC;
 473
 474         vc4_hdmi_write_infoframe(encoder, &frame);
 475 }
 476
 477 static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
 478 {
 479         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 480         union hdmi_infoframe frame;
 481
 482         hdmi_audio_infoframe_init(&frame.audio);
 483
 484         frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
 485         frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
 486         frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
 487         frame.audio.channels = vc4_hdmi->audio.channels;
 488
 489         vc4_hdmi_write_infoframe(encoder, &frame);
 490 }
 491
 492 static void vc4_hdmi_set_hdr_infoframe(struct drm_encoder *encoder)
 493 {
 494         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 495         struct drm_connector *connector = &vc4_hdmi->connector;
 496         struct drm_connector_state *conn_state = connector->state;
 497         union hdmi_infoframe frame;
 498
 499         if (!vc4_hdmi->variant->supports_hdr)
 500                 return;
 501
 502         if (!conn_state->hdr_output_metadata)
 503                 return;
 504
 505         if (drm_hdmi_infoframe_set_hdr_metadata(&frame.drm, conn_state))
 506                 return;
 507
 508         vc4_hdmi_write_infoframe(encoder, &frame);
 509 }
 510
 511 static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
 512 {
 513         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 514
 515         vc4_hdmi_set_avi_infoframe(encoder);
 516         vc4_hdmi_set_spd_infoframe(encoder);
 517         /*
 518          * If audio was streaming, then we need to reenabled the audio
 519          * infoframe here during encoder_enable.
 520          */
 521         if (vc4_hdmi->audio.streaming)
 522                 vc4_hdmi_set_audio_infoframe(encoder);
 523
 524         vc4_hdmi_set_hdr_infoframe(encoder);
 525 }
 526
 527 static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder,
 528                                          struct drm_display_mode *mode)
 529 {
 530         struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 531         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 532         struct drm_display_info *display = &vc4_hdmi->connector.display_info;
 533
 534         if (!vc4_encoder->hdmi_monitor)
 535                 return false;
 536
 537         if (!display->hdmi.scdc.supported ||
 538             !display->hdmi.scdc.scrambling.supported)
 539                 return false;
 540
 541         return true;
 542 }
 543
 544 #define SCRAMBLING_POLLING_DELAY_MS     1000
 545
 546 static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
 547 {
 548         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 549         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 550
 551         if (!vc4_hdmi_supports_scrambling(encoder, mode))
 552                 return;
 553
 554         if (!vc4_hdmi_mode_needs_scrambling(mode))
 555                 return;
 556
 557         drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true);
 558         drm_scdc_set_scrambling(vc4_hdmi->ddc, true);
 559
 560         HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) |
 561                    VC5_HDMI_SCRAMBLER_CTL_ENABLE);
 562
 563         queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work,
 564                            msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS));
 565 }
 566
 567 static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
 568 {
 569         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 570         struct drm_crtc *crtc = encoder->crtc;
 571
 572         /*
 573          * At boot, encoder->crtc will be NULL. Since we don't know the
 574          * state of the scrambler and in order to avoid any
 575          * inconsistency, let's disable it all the time.
 576          */
 577         if (crtc && !vc4_hdmi_supports_scrambling(encoder, &crtc->mode))
 578                 return;
 579
 580         if (crtc && !vc4_hdmi_mode_needs_scrambling(&crtc->mode))
 581                 return;
 582
 583         if (delayed_work_pending(&vc4_hdmi->scrambling_work))
 584                 cancel_delayed_work_sync(&vc4_hdmi->scrambling_work);
 585
 586         HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) &
 587                    ~VC5_HDMI_SCRAMBLER_CTL_ENABLE);
 588
 589         drm_scdc_set_scrambling(vc4_hdmi->ddc, false);
 590         drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, false);
 591 }
 592
 593 static void vc4_hdmi_scrambling_wq(struct work_struct *work)
 594 {
 595         struct vc4_hdmi *vc4_hdmi = container_of(to_delayed_work(work),
 596                                                  struct vc4_hdmi,
 597                                                  scrambling_work);
 598
 599         if (drm_scdc_get_scrambling_status(vc4_hdmi->ddc))
 600                 return;
 601
 602         drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true);
 603         drm_scdc_set_scrambling(vc4_hdmi->ddc, true);
 604
 605         queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work,
 606                            msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS));
 607 }
 608
 609 static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
 610                                                struct drm_atomic_state *state)
 611 {
 612         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 613
 614         HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 0);
 615
 616         HDMI_WRITE(HDMI_VID_CTL, HDMI_READ(HDMI_VID_CTL) |
 617                    VC4_HD_VID_CTL_CLRRGB | VC4_HD_VID_CTL_CLRSYNC);
 618
 619         HDMI_WRITE(HDMI_VID_CTL,
 620                    HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_BLANKPIX);
 621
 622         vc4_hdmi_disable_scrambling(encoder);
 623 }
 624
 625 static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder,
 626                                                  struct drm_atomic_state *state)
 627 {
 628         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 629         int ret;
 630
 631         if (vc4_hdmi->variant->phy_disable)
 632                 vc4_hdmi->variant->phy_disable(vc4_hdmi);
 633
 634         HDMI_WRITE(HDMI_VID_CTL,
 635                    HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
 636
 637         clk_disable_unprepare(vc4_hdmi->pixel_bvb_clock);
 638         clk_disable_unprepare(vc4_hdmi->pixel_clock);
 639
 640         ret = pm_runtime_put(&vc4_hdmi->pdev->dev);
 641         if (ret < 0)
 642                 DRM_ERROR("Failed to release power domain: %d\n", ret);
 643 }
 644
 645 static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
 646 {
 647 }
 648
 649 static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
 650 {
 651         u32 csc_ctl;
 652
 653         csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
 654                                 VC4_HD_CSC_CTL_ORDER);
 655
 656         if (enable) {
 657                 /* CEA VICs other than #1 requre limited range RGB
 658                  * output unless overridden by an AVI infoframe.
 659                  * Apply a colorspace conversion to squash 0-255 down
 660                  * to 16-235.  The matrix here is:
 661                  *
 662                  * [ 0      0      0.8594 16]
 663                  * [ 0      0.8594 0      16]
 664                  * [ 0.8594 0      0      16]
 665                  * [ 0      0      0       1]
 666                  */
 667                 csc_ctl |= VC4_HD_CSC_CTL_ENABLE;
 668                 csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC;
 669                 csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
 670                                          VC4_HD_CSC_CTL_MODE);
 671
 672                 HDMI_WRITE(HDMI_CSC_12_11, (0x000 << 16) | 0x000);
 673                 HDMI_WRITE(HDMI_CSC_14_13, (0x100 << 16) | 0x6e0);
 674                 HDMI_WRITE(HDMI_CSC_22_21, (0x6e0 << 16) | 0x000);
 675                 HDMI_WRITE(HDMI_CSC_24_23, (0x100 << 16) | 0x000);
 676                 HDMI_WRITE(HDMI_CSC_32_31, (0x000 << 16) | 0x6e0);
 677                 HDMI_WRITE(HDMI_CSC_34_33, (0x100 << 16) | 0x000);
 678         }
 679
 680         /* The RGB order applies even when CSC is disabled. */
 681         HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
 682 }
 683
 684 static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
 685 {
 686         u32 csc_ctl;
 687
 688         csc_ctl = 0x07; /* RGB_CONVERT_MODE = custom matrix, || USE_RGB_TO_YCBCR */
 689
 690         if (enable) {
 691                 /* CEA VICs other than #1 requre limited range RGB
 692                  * output unless overridden by an AVI infoframe.
 693                  * Apply a colorspace conversion to squash 0-255 down
 694                  * to 16-235.  The matrix here is:
 695                  *
 696                  * [ 0.8594 0      0      16]
 697                  * [ 0      0.8594 0      16]
 698                  * [ 0      0      0.8594 16]
 699                  * [ 0      0      0       1]
 700                  * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
 701                  */
 702                 HDMI_WRITE(HDMI_CSC_12_11, (0x0000 << 16) | 0x1b80);
 703                 HDMI_WRITE(HDMI_CSC_14_13, (0x0400 << 16) | 0x0000);
 704                 HDMI_WRITE(HDMI_CSC_22_21, (0x1b80 << 16) | 0x0000);
 705                 HDMI_WRITE(HDMI_CSC_24_23, (0x0400 << 16) | 0x0000);
 706                 HDMI_WRITE(HDMI_CSC_32_31, (0x0000 << 16) | 0x0000);
 707                 HDMI_WRITE(HDMI_CSC_34_33, (0x0400 << 16) | 0x1b80);
 708         } else {
 709                 /* Still use the matrix for full range, but make it unity.
 710                  * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
 711                  */
 712                 HDMI_WRITE(HDMI_CSC_12_11, (0x0000 << 16) | 0x2000);
 713                 HDMI_WRITE(HDMI_CSC_14_13, (0x0000 << 16) | 0x0000);
 714                 HDMI_WRITE(HDMI_CSC_22_21, (0x2000 << 16) | 0x0000);
 715                 HDMI_WRITE(HDMI_CSC_24_23, (0x0000 << 16) | 0x0000);
 716                 HDMI_WRITE(HDMI_CSC_32_31, (0x0000 << 16) | 0x0000);
 717                 HDMI_WRITE(HDMI_CSC_34_33, (0x0000 << 16) | 0x2000);
 718         }
 719
 720         HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
 721 }
 722
 723 static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
 724                                  struct drm_connector_state *state,
 725                                  struct drm_display_mode *mode)
 726 {
 727         bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
 728         bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
 729         bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
 730         u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1;
 731         u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start,
 732                                    VC4_HDMI_VERTA_VSP) |
 733                      VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay,
 734                                    VC4_HDMI_VERTA_VFP) |
 735                      VC4_SET_FIELD(mode->crtc_vdisplay, VC4_HDMI_VERTA_VAL));
 736         u32 vertb = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
 737                      VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end,
 738                                    VC4_HDMI_VERTB_VBP));
 739         u32 vertb_even = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
 740                           VC4_SET_FIELD(mode->crtc_vtotal -
 741                                         mode->crtc_vsync_end -
 742                                         interlaced,
 743                                         VC4_HDMI_VERTB_VBP));
 744
 745         HDMI_WRITE(HDMI_HORZA,
 746                    (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
 747                    (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
 748                    VC4_SET_FIELD(mode->hdisplay * pixel_rep,
 749                                  VC4_HDMI_HORZA_HAP));
 750
 751         HDMI_WRITE(HDMI_HORZB,
 752                    VC4_SET_FIELD((mode->htotal -
 753                                   mode->hsync_end) * pixel_rep,
 754                                  VC4_HDMI_HORZB_HBP) |
 755                    VC4_SET_FIELD((mode->hsync_end -
 756                                   mode->hsync_start) * pixel_rep,
 757                                  VC4_HDMI_HORZB_HSP) |
 758                    VC4_SET_FIELD((mode->hsync_start -
 759                                   mode->hdisplay) * pixel_rep,
 760                                  VC4_HDMI_HORZB_HFP));
 761
 762         HDMI_WRITE(HDMI_VERTA0, verta);
 763         HDMI_WRITE(HDMI_VERTA1, verta);
 764
 765         HDMI_WRITE(HDMI_VERTB0, vertb_even);
 766         HDMI_WRITE(HDMI_VERTB1, vertb);
 767 }
 768
 769 static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
 770                                  struct drm_connector_state *state,
 771                                  struct drm_display_mode *mode)
 772 {
 773         bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
 774         bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
 775         bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
 776         u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1;
 777         u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start,
 778                                    VC5_HDMI_VERTA_VSP) |
 779                      VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay,
 780                                    VC5_HDMI_VERTA_VFP) |
 781                      VC4_SET_FIELD(mode->crtc_vdisplay, VC5_HDMI_VERTA_VAL));
 782         u32 vertb = (VC4_SET_FIELD(0, VC5_HDMI_VERTB_VSPO) |
 783                      VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end,
 784                                    VC4_HDMI_VERTB_VBP));
 785         u32 vertb_even = (VC4_SET_FIELD(0, VC5_HDMI_VERTB_VSPO) |
 786                           VC4_SET_FIELD(mode->crtc_vtotal -
 787                                         mode->crtc_vsync_end -
 788                                         interlaced,
 789                                         VC4_HDMI_VERTB_VBP));
 790         unsigned char gcp;
 791         bool gcp_en;
 792         u32 reg;
 793
 794         HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, 0x354021);
 795         HDMI_WRITE(HDMI_HORZA,
 796                    (vsync_pos ? VC5_HDMI_HORZA_VPOS : 0) |
 797                    (hsync_pos ? VC5_HDMI_HORZA_HPOS : 0) |
 798                    VC4_SET_FIELD(mode->hdisplay * pixel_rep,
 799                                  VC5_HDMI_HORZA_HAP) |
 800                    VC4_SET_FIELD((mode->hsync_start -
 801                                   mode->hdisplay) * pixel_rep,
 802                                  VC5_HDMI_HORZA_HFP));
 803
 804         HDMI_WRITE(HDMI_HORZB,
 805                    VC4_SET_FIELD((mode->htotal -
 806                                   mode->hsync_end) * pixel_rep,
 807                                  VC5_HDMI_HORZB_HBP) |
 808                    VC4_SET_FIELD((mode->hsync_end -
 809                                   mode->hsync_start) * pixel_rep,
 810                                  VC5_HDMI_HORZB_HSP));
 811
 812         HDMI_WRITE(HDMI_VERTA0, verta);
 813         HDMI_WRITE(HDMI_VERTA1, verta);
 814
 815         HDMI_WRITE(HDMI_VERTB0, vertb_even);
 816         HDMI_WRITE(HDMI_VERTB1, vertb);
 817
 818         switch (state->max_bpc) {
 819         case 12:
 820                 gcp = 6;
 821                 gcp_en = true;
 822                 break;
 823         case 10:
 824                 gcp = 5;
 825                 gcp_en = true;
 826                 break;
 827         case 8:
 828         default:
 829                 gcp = 4;
 830                 gcp_en = false;
 831                 break;
 832         }
 833
 834         reg = HDMI_READ(HDMI_DEEP_COLOR_CONFIG_1);
 835         reg &= ~(VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE_MASK |
 836                  VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH_MASK);
 837         reg |= VC4_SET_FIELD(2, VC5_HDMI_DEEP_COLOR_CONFIG_1_INIT_PACK_PHASE) |
 838                VC4_SET_FIELD(gcp, VC5_HDMI_DEEP_COLOR_CONFIG_1_COLOR_DEPTH);
 839         HDMI_WRITE(HDMI_DEEP_COLOR_CONFIG_1, reg);
 840
 841         reg = HDMI_READ(HDMI_GCP_WORD_1);
 842         reg &= ~VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1_MASK;
 843         reg |= VC4_SET_FIELD(gcp, VC5_HDMI_GCP_WORD_1_GCP_SUBPACKET_BYTE_1);
 844         HDMI_WRITE(HDMI_GCP_WORD_1, reg);
 845
 846         reg = HDMI_READ(HDMI_GCP_CONFIG);
 847         reg &= ~VC5_HDMI_GCP_CONFIG_GCP_ENABLE;
 848         reg |= gcp_en ? VC5_HDMI_GCP_CONFIG_GCP_ENABLE : 0;
 849         HDMI_WRITE(HDMI_GCP_CONFIG, reg);
 850
 851         HDMI_WRITE(HDMI_CLOCK_STOP, 0);
 852 }
 853
 854 static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi)
 855 {
 856         u32 drift;
 857         int ret;
 858
 859         drift = HDMI_READ(HDMI_FIFO_CTL);
 860         drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
 861
 862         HDMI_WRITE(HDMI_FIFO_CTL,
 863                    drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
 864         HDMI_WRITE(HDMI_FIFO_CTL,
 865                    drift | VC4_HDMI_FIFO_CTL_RECENTER);
 866         usleep_range(1000, 1100);
 867         HDMI_WRITE(HDMI_FIFO_CTL,
 868                    drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
 869         HDMI_WRITE(HDMI_FIFO_CTL,
 870                    drift | VC4_HDMI_FIFO_CTL_RECENTER);
 871
 872         ret = wait_for(HDMI_READ(HDMI_FIFO_CTL) &
 873                        VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1);
 874         WARN_ONCE(ret, "Timeout waiting for "
 875                   "VC4_HDMI_FIFO_CTL_RECENTER_DONE");
 876 }
 877
 878 static struct drm_connector_state *
 879 vc4_hdmi_encoder_get_connector_state(struct drm_encoder *encoder,
 880                                      struct drm_atomic_state *state)
 881 {
 882         struct drm_connector_state *conn_state;
 883         struct drm_connector *connector;
 884         unsigned int i;
 885
 886         for_each_new_connector_in_state(state, connector, conn_state, i) {
 887                 if (conn_state->best_encoder == encoder)
 888                         return conn_state;
 889         }
 890
 891         return NULL;
 892 }
 893
 894 static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
 895                                                 struct drm_atomic_state *state)
 896 {
 897         struct drm_connector_state *conn_state =
 898                 vc4_hdmi_encoder_get_connector_state(encoder, state);
 899         struct vc4_hdmi_connector_state *vc4_conn_state =
 900                 conn_state_to_vc4_hdmi_conn_state(conn_state);
 901         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 902         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 903         unsigned long bvb_rate, pixel_rate, hsm_rate;
 904         int ret;
 905
 906         ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
 907         if (ret < 0) {
 908                 DRM_ERROR("Failed to retain power domain: %d\n", ret);
 909                 return;
 910         }
 911
 912         pixel_rate = vc4_conn_state->pixel_rate;
 913         ret = clk_set_rate(vc4_hdmi->pixel_clock, pixel_rate);
 914         if (ret) {
 915                 DRM_ERROR("Failed to set pixel clock rate: %d\n", ret);
 916                 return;
 917         }
 918
 919         ret = clk_prepare_enable(vc4_hdmi->pixel_clock);
 920         if (ret) {
 921                 DRM_ERROR("Failed to turn on pixel clock: %d\n", ret);
 922                 return;
 923         }
 924
 925         /*
 926          * As stated in RPi's vc4 firmware "HDMI state machine (HSM) clock must
 927          * be faster than pixel clock, infinitesimally faster, tested in
 928          * simulation. Otherwise, exact value is unimportant for HDMI
 929          * operation." This conflicts with bcm2835's vc4 documentation, which
 930          * states HSM's clock has to be at least 108% of the pixel clock.
 931          *
 932          * Real life tests reveal that vc4's firmware statement holds up, and
 933          * users are able to use pixel clocks closer to HSM's, namely for
 934          * 1920x1200@60Hz. So it was decided to have leave a 1% margin between
 935          * both clocks. Which, for RPi0-3 implies a maximum pixel clock of
 936          * 162MHz.
 937          *
 938          * Additionally, the AXI clock needs to be at least 25% of
 939          * pixel clock, but HSM ends up being the limiting factor.
 940          */
 941         hsm_rate = max_t(unsigned long, 120000000, (pixel_rate / 100) * 101);
 942         ret = clk_set_min_rate(vc4_hdmi->hsm_clock, hsm_rate);
 943         if (ret) {
 944                 DRM_ERROR("Failed to set HSM clock rate: %d\n", ret);
 945                 return;
 946         }
 947
 948         vc4_hdmi_cec_update_clk_div(vc4_hdmi);
 949
 950         if (pixel_rate > 297000000)
 951                 bvb_rate = 300000000;
 952         else if (pixel_rate > 148500000)
 953                 bvb_rate = 150000000;
 954         else
 955                 bvb_rate = 75000000;
 956
 957         ret = clk_set_min_rate(vc4_hdmi->pixel_bvb_clock, bvb_rate);
 958         if (ret) {
 959                 DRM_ERROR("Failed to set pixel bvb clock rate: %d\n", ret);
 960                 clk_disable_unprepare(vc4_hdmi->pixel_clock);
 961                 return;
 962         }
 963
 964         ret = clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
 965         if (ret) {
 966                 DRM_ERROR("Failed to turn on pixel bvb clock: %d\n", ret);
 967                 clk_disable_unprepare(vc4_hdmi->pixel_clock);
 968                 return;
 969         }
 970
 971         if (vc4_hdmi->variant->phy_init)
 972                 vc4_hdmi->variant->phy_init(vc4_hdmi, vc4_conn_state);
 973
 974         HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
 975                    HDMI_READ(HDMI_SCHEDULER_CONTROL) |
 976                    VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT |
 977                    VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS);
 978
 979         if (vc4_hdmi->variant->set_timings)
 980                 vc4_hdmi->variant->set_timings(vc4_hdmi, conn_state, mode);
 981 }
 982
 983 static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
 984                                              struct drm_atomic_state *state)
 985 {
 986         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 987         struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 988         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 989
 990         if (vc4_encoder->hdmi_monitor &&
 991             drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED) {
 992                 if (vc4_hdmi->variant->csc_setup)
 993                         vc4_hdmi->variant->csc_setup(vc4_hdmi, true);
 994
 995                 vc4_encoder->limited_rgb_range = true;
 996         } else {
 997                 if (vc4_hdmi->variant->csc_setup)
 998                         vc4_hdmi->variant->csc_setup(vc4_hdmi, false);
 999
1000                 vc4_encoder->limited_rgb_range = false;
1001         }
1002
1003         HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
1004 }
1005
1006 static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
1007                                               struct drm_atomic_state *state)
1008 {
1009         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
1010         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1011         struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
1012         bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
1013         bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
1014         int ret;
1015
1016         HDMI_WRITE(HDMI_VID_CTL,
1017                    VC4_HD_VID_CTL_ENABLE |
1018                    VC4_HD_VID_CTL_UNDERFLOW_ENABLE |
1019                    VC4_HD_VID_CTL_FRAME_COUNTER_RESET |
1020                    (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
1021                    (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
1022
1023         HDMI_WRITE(HDMI_VID_CTL,
1024                    HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_BLANKPIX);
1025
1026         if (vc4_encoder->hdmi_monitor) {
1027                 HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
1028                            HDMI_READ(HDMI_SCHEDULER_CONTROL) |
1029                            VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
1030
1031                 ret = wait_for(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1032                                VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE, 1000);
1033                 WARN_ONCE(ret, "Timeout waiting for "
1034                           "VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
1035         } else {
1036                 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
1037                            HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
1038                            ~(VC4_HDMI_RAM_PACKET_ENABLE));
1039                 HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
1040                            HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1041                            ~VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
1042
1043                 ret = wait_for(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1044                                  VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE), 1000);
1045                 WARN_ONCE(ret, "Timeout waiting for "
1046                           "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
1047         }
1048
1049         if (vc4_encoder->hdmi_monitor) {
1050                 WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
1051                           VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE));
1052                 HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
1053                            HDMI_READ(HDMI_SCHEDULER_CONTROL) |
1054                            VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT);
1055
1056                 HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
1057                            VC4_HDMI_RAM_PACKET_ENABLE);
1058
1059                 vc4_hdmi_set_infoframes(encoder);
1060         }
1061
1062         vc4_hdmi_recenter_fifo(vc4_hdmi);
1063         vc4_hdmi_enable_scrambling(encoder);
1064 }
1065
1066 static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
1067 {
1068 }
1069
1070 #define WIFI_2_4GHz_CH1_MIN_FREQ        2400000000ULL
1071 #define WIFI_2_4GHz_CH1_MAX_FREQ        2422000000ULL
1072
1073 static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
1074                                          struct drm_crtc_state *crtc_state,
1075                                          struct drm_connector_state *conn_state)
1076 {
1077         struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state);
1078         struct drm_display_mode *mode = &crtc_state->adjusted_mode;
1079         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1080         unsigned long long pixel_rate = mode->clock * 1000;
1081         unsigned long long tmds_rate;
1082
1083         if (vc4_hdmi->variant->unsupported_odd_h_timings &&
1084             ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
1085              (mode->hsync_end % 2) || (mode->htotal % 2)))
1086                 return -EINVAL;
1087
1088         /*
1089          * The 1440p@60 pixel rate is in the same range than the first
1090          * WiFi channel (between 2.4GHz and 2.422GHz with 22MHz
1091          * bandwidth). Slightly lower the frequency to bring it out of
1092          * the WiFi range.
1093          */
1094         tmds_rate = pixel_rate * 10;
1095         if (vc4_hdmi->disable_wifi_frequencies &&
1096             (tmds_rate >= WIFI_2_4GHz_CH1_MIN_FREQ &&
1097              tmds_rate <= WIFI_2_4GHz_CH1_MAX_FREQ)) {
1098                 mode->clock = 238560;
1099                 pixel_rate = mode->clock * 1000;
1100         }
1101
1102         if (conn_state->max_bpc == 12) {
1103                 pixel_rate = pixel_rate * 150;
1104                 do_div(pixel_rate, 100);
1105         } else if (conn_state->max_bpc == 10) {
1106                 pixel_rate = pixel_rate * 125;
1107                 do_div(pixel_rate, 100);
1108         }
1109
1110         if (mode->flags & DRM_MODE_FLAG_DBLCLK)
1111                 pixel_rate = pixel_rate * 2;
1112
1113         if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
1114                 return -EINVAL;
1115
1116         if (vc4_hdmi->disable_4kp60 && (pixel_rate > HDMI_14_MAX_TMDS_CLK))
1117                 return -EINVAL;
1118
1119         vc4_state->pixel_rate = pixel_rate;
1120
1121         return 0;
1122 }
1123
1124 static enum drm_mode_status
1125 vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder,
1126                             const struct drm_display_mode *mode)
1127 {
1128         struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
1129
1130         if (vc4_hdmi->variant->unsupported_odd_h_timings &&
1131             ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
1132              (mode->hsync_end % 2) || (mode->htotal % 2)))
1133                 return MODE_H_ILLEGAL;
1134
1135         if ((mode->clock * 1000) > vc4_hdmi->variant->max_pixel_clock)
1136                 return MODE_CLOCK_HIGH;
1137
1138         if (vc4_hdmi->disable_4kp60 && vc4_hdmi_mode_needs_scrambling(mode))
1139                 return MODE_CLOCK_HIGH;
1140
1141         return MODE_OK;
1142 }
1143
1144 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
1145         .atomic_check = vc4_hdmi_encoder_atomic_check,
1146         .mode_valid = vc4_hdmi_encoder_mode_valid,
1147         .disable = vc4_hdmi_encoder_disable,
1148         .enable = vc4_hdmi_encoder_enable,
1149 };
1150
1151 static u32 vc4_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask)
1152 {
1153         int i;
1154         u32 channel_map = 0;
1155
1156         for (i = 0; i < 8; i++) {
1157                 if (channel_mask & BIT(i))
1158                         channel_map |= i << (3 * i);
1159         }
1160         return channel_map;
1161 }
1162
1163 static u32 vc5_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask)
1164 {
1165         int i;
1166         u32 channel_map = 0;
1167
1168         for (i = 0; i < 8; i++) {
1169                 if (channel_mask & BIT(i))
1170                         channel_map |= i << (4 * i);
1171         }
1172         return channel_map;
1173 }
1174
1175 /* HDMI audio codec callbacks */
1176 static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi)
1177 {
1178         u32 hsm_clock = clk_get_rate(vc4_hdmi->audio_clock);
1179         unsigned long n, m;
1180
1181         rational_best_approximation(hsm_clock, vc4_hdmi->audio.samplerate,
1182                                     VC4_HD_MAI_SMP_N_MASK >>
1183                                     VC4_HD_MAI_SMP_N_SHIFT,
1184                                     (VC4_HD_MAI_SMP_M_MASK >>
1185                                      VC4_HD_MAI_SMP_M_SHIFT) + 1,
1186                                     &n, &m);
1187
1188         HDMI_WRITE(HDMI_MAI_SMP,
1189                    VC4_SET_FIELD(n, VC4_HD_MAI_SMP_N) |
1190                    VC4_SET_FIELD(m - 1, VC4_HD_MAI_SMP_M));
1191 }
1192
1193 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *vc4_hdmi)
1194 {
1195         struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
1196         struct drm_crtc *crtc = encoder->crtc;
1197         const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
1198         u32 samplerate = vc4_hdmi->audio.samplerate;
1199         u32 n, cts;
1200         u64 tmp;
1201
1202         n = 128 * samplerate / 1000;
1203         tmp = (u64)(mode->clock * 1000) * n;
1204         do_div(tmp, 128 * samplerate);
1205         cts = tmp;
1206
1207         HDMI_WRITE(HDMI_CRP_CFG,
1208                    VC4_HDMI_CRP_CFG_EXTERNAL_CTS_EN |
1209                    VC4_SET_FIELD(n, VC4_HDMI_CRP_CFG_N));
1210
1211         /*
1212          * We could get slightly more accurate clocks in some cases by
1213          * providing a CTS_1 value.  The two CTS values are alternated
1214          * between based on the period fields
1215          */
1216         HDMI_WRITE(HDMI_CTS_0, cts);
1217         HDMI_WRITE(HDMI_CTS_1, cts);
1218 }
1219
1220 static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai)
1221 {
1222         struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
1223
1224         return snd_soc_card_get_drvdata(card);
1225 }
1226
1227 static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
1228                                   struct snd_soc_dai *dai)
1229 {
1230         struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
1231         struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
1232         struct drm_connector *connector = &vc4_hdmi->connector;
1233         int ret;
1234
1235         if (vc4_hdmi->audio.substream && vc4_hdmi->audio.substream != substream)
1236                 return -EINVAL;
1237
1238         vc4_hdmi->audio.substream = substream;
1239
1240         /*
1241          * If the HDMI encoder hasn't probed, or the encoder is
1242          * currently in DVI mode, treat the codec dai as missing.
1243          */
1244         if (!encoder->crtc || !(HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
1245                                 VC4_HDMI_RAM_PACKET_ENABLE))
1246                 return -ENODEV;
1247
1248         ret = snd_pcm_hw_constraint_eld(substream->runtime, connector->eld);
1249         if (ret)
1250                 return ret;
1251
1252         return 0;
1253 }
1254
1255 static int vc4_hdmi_audio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1256 {
1257         return 0;
1258 }
1259
1260 static void vc4_hdmi_audio_reset(struct vc4_hdmi *vc4_hdmi)
1261 {
1262         struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
1263         struct device *dev = &vc4_hdmi->pdev->dev;
1264         int ret;
1265
1266         vc4_hdmi->audio.streaming = false;
1267         ret = vc4_hdmi_stop_packet(encoder, HDMI_INFOFRAME_TYPE_AUDIO, false);
1268         if (ret)
1269                 dev_err(dev, "Failed to stop audio infoframe: %d\n", ret);
1270
1271         HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_RESET);
1272         HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_ERRORF);
1273         HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_FLUSH);
1274 }
1275
1276 static void vc4_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
1277                                     struct snd_soc_dai *dai)
1278 {
1279         struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
1280
1281         if (substream != vc4_hdmi->audio.substream)
1282                 return;
1283
1284         vc4_hdmi_audio_reset(vc4_hdmi);
1285
1286         vc4_hdmi->audio.substream = NULL;
1287 }
1288
1289 /* HDMI audio codec callbacks */
1290 static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
1291                                     struct snd_pcm_hw_params *params,
1292                                     struct snd_soc_dai *dai)
1293 {
1294         struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
1295         struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
1296         struct device *dev = &vc4_hdmi->pdev->dev;
1297         u32 audio_packet_config, channel_mask;
1298         u32 channel_map;
1299
1300         if (substream != vc4_hdmi->audio.substream)
1301                 return -EINVAL;
1302
1303         dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
1304                 params_rate(params), params_width(params),
1305                 params_channels(params));
1306
1307         vc4_hdmi->audio.channels = params_channels(params);
1308         vc4_hdmi->audio.samplerate = params_rate(params);
1309
1310         HDMI_WRITE(HDMI_MAI_CTL,
1311                    VC4_HD_MAI_CTL_RESET |
1312                    VC4_HD_MAI_CTL_FLUSH |
1313                    VC4_HD_MAI_CTL_DLATE |
1314                    VC4_HD_MAI_CTL_ERRORE |
1315                    VC4_HD_MAI_CTL_ERRORF);
1316
1317         vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
1318
1319         /* The B frame identifier should match the value used by alsa-lib (8) */
1320         audio_packet_config =
1321                 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
1322                 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS |
1323                 VC4_SET_FIELD(0x8, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
1324
1325         channel_mask = GENMASK(vc4_hdmi->audio.channels - 1, 0);
1326         audio_packet_config |= VC4_SET_FIELD(channel_mask,
1327                                              VC4_HDMI_AUDIO_PACKET_CEA_MASK);
1328
1329         /* Set the MAI threshold.  This logic mimics the firmware's. */
1330         if (vc4_hdmi->audio.samplerate > 96000) {
1331                 HDMI_WRITE(HDMI_MAI_THR,
1332                            VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQHIGH) |
1333                            VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW));
1334         } else if (vc4_hdmi->audio.samplerate > 48000) {
1335                 HDMI_WRITE(HDMI_MAI_THR,
1336                            VC4_SET_FIELD(0x14, VC4_HD_MAI_THR_DREQHIGH) |
1337                            VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW));
1338         } else {
1339                 HDMI_WRITE(HDMI_MAI_THR,
1340                            VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICHIGH) |
1341                            VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICLOW) |
1342                            VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQHIGH) |
1343                            VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQLOW));
1344         }
1345
1346         HDMI_WRITE(HDMI_MAI_CONFIG,
1347                    VC4_HDMI_MAI_CONFIG_BIT_REVERSE |
1348                    VC4_SET_FIELD(channel_mask, VC4_HDMI_MAI_CHANNEL_MASK));
1349
1350         channel_map = vc4_hdmi->variant->channel_map(vc4_hdmi, channel_mask);
1351         HDMI_WRITE(HDMI_MAI_CHANNEL_MAP, channel_map);
1352         HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
1353         vc4_hdmi_set_n_cts(vc4_hdmi);
1354
1355         vc4_hdmi_set_audio_infoframe(encoder);
1356
1357         return 0;
1358 }
1359
1360 static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
1361                                   struct snd_soc_dai *dai)
1362 {
1363         struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
1364
1365         switch (cmd) {
1366         case SNDRV_PCM_TRIGGER_START:
1367                 vc4_hdmi->audio.streaming = true;
1368
1369                 if (vc4_hdmi->variant->phy_rng_enable)
1370                         vc4_hdmi->variant->phy_rng_enable(vc4_hdmi);
1371
1372                 HDMI_WRITE(HDMI_MAI_CTL,
1373                            VC4_SET_FIELD(vc4_hdmi->audio.channels,
1374                                          VC4_HD_MAI_CTL_CHNUM) |
1375                            VC4_HD_MAI_CTL_ENABLE);
1376                 break;
1377         case SNDRV_PCM_TRIGGER_STOP:
1378                 HDMI_WRITE(HDMI_MAI_CTL,
1379                            VC4_HD_MAI_CTL_DLATE |
1380                            VC4_HD_MAI_CTL_ERRORE |
1381                            VC4_HD_MAI_CTL_ERRORF);
1382
1383                 if (vc4_hdmi->variant->phy_rng_disable)
1384                         vc4_hdmi->variant->phy_rng_disable(vc4_hdmi);
1385
1386                 vc4_hdmi->audio.streaming = false;
1387
1388                 break;
1389         default:
1390                 break;
1391         }
1392
1393         return 0;
1394 }
1395
1396 static inline struct vc4_hdmi *
1397 snd_component_to_hdmi(struct snd_soc_component *component)
1398 {
1399         struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
1400
1401         return snd_soc_card_get_drvdata(card);
1402 }
1403
1404 static int vc4_hdmi_audio_eld_ctl_info(struct snd_kcontrol *kcontrol,
1405                                        struct snd_ctl_elem_info *uinfo)
1406 {
1407         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
1408         struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
1409         struct drm_connector *connector = &vc4_hdmi->connector;
1410
1411         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
1412         uinfo->count = sizeof(connector->eld);
1413
1414         return 0;
1415 }
1416
1417 static int vc4_hdmi_audio_eld_ctl_get(struct snd_kcontrol *kcontrol,
1418                                       struct snd_ctl_elem_value *ucontrol)
1419 {
1420         struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
1421         struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
1422         struct drm_connector *connector = &vc4_hdmi->connector;
1423
1424         memcpy(ucontrol->value.bytes.data, connector->eld,
1425                sizeof(connector->eld));
1426
1427         return 0;
1428 }
1429
1430 static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = {
1431         {
1432                 .access = SNDRV_CTL_ELEM_ACCESS_READ |
1433                           SNDRV_CTL_ELEM_ACCESS_VOLATILE,
1434                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
1435                 .name = "ELD",
1436                 .info = vc4_hdmi_audio_eld_ctl_info,
1437                 .get = vc4_hdmi_audio_eld_ctl_get,
1438         },
1439 };
1440
1441 static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = {
1442         SND_SOC_DAPM_OUTPUT("TX"),
1443 };
1444
1445 static const struct snd_soc_dapm_route vc4_hdmi_audio_routes[] = {
1446         { "TX", NULL, "Playback" },
1447 };
1448
1449 static const struct snd_soc_component_driver vc4_hdmi_audio_component_drv = {
1450         .name                   = "vc4-hdmi-codec-dai-component",
1451         .controls               = vc4_hdmi_audio_controls,
1452         .num_controls           = ARRAY_SIZE(vc4_hdmi_audio_controls),
1453         .dapm_widgets           = vc4_hdmi_audio_widgets,
1454         .num_dapm_widgets       = ARRAY_SIZE(vc4_hdmi_audio_widgets),
1455         .dapm_routes            = vc4_hdmi_audio_routes,
1456         .num_dapm_routes        = ARRAY_SIZE(vc4_hdmi_audio_routes),
1457         .idle_bias_on           = 1,
1458         .use_pmdown_time        = 1,
1459         .endianness             = 1,
1460         .non_legacy_dai_naming  = 1,
1461 };
1462
1463 static const struct snd_soc_dai_ops vc4_hdmi_audio_dai_ops = {
1464         .startup = vc4_hdmi_audio_startup,
1465         .shutdown = vc4_hdmi_audio_shutdown,
1466         .hw_params = vc4_hdmi_audio_hw_params,
1467         .set_fmt = vc4_hdmi_audio_set_fmt,
1468         .trigger = vc4_hdmi_audio_trigger,
1469 };
1470
1471 static struct snd_soc_dai_driver vc4_hdmi_audio_codec_dai_drv = {
1472         .name = "vc4-hdmi-hifi",
1473         .playback = {
1474                 .stream_name = "Playback",
1475                 .channels_min = 2,
1476                 .channels_max = 8,
1477                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1478                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
1479                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
1480                          SNDRV_PCM_RATE_192000,
1481                 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
1482         },
1483 };
1484
1485 static const struct snd_soc_component_driver vc4_hdmi_audio_cpu_dai_comp = {
1486         .name = "vc4-hdmi-cpu-dai-component",
1487 };
1488
1489 static int vc4_hdmi_audio_cpu_dai_probe(struct snd_soc_dai *dai)
1490 {
1491         struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
1492
1493         snd_soc_dai_init_dma_data(dai, &vc4_hdmi->audio.dma_data, NULL);
1494
1495         return 0;
1496 }
1497
1498 static struct snd_soc_dai_driver vc4_hdmi_audio_cpu_dai_drv = {
1499         .name = "vc4-hdmi-cpu-dai",
1500         .probe  = vc4_hdmi_audio_cpu_dai_probe,
1501         .playback = {
1502                 .stream_name = "Playback",
1503                 .channels_min = 1,
1504                 .channels_max = 8,
1505                 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1506                          SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
1507                          SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
1508                          SNDRV_PCM_RATE_192000,
1509                 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
1510         },
1511         .ops = &vc4_hdmi_audio_dai_ops,
1512 };
1513
1514 static const struct snd_dmaengine_pcm_config pcm_conf = {
1515         .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-rx",
1516         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
1517 };
1518
1519 static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
1520 {
1521         const struct vc4_hdmi_register *mai_data =
1522                 &vc4_hdmi->variant->registers[HDMI_MAI_DATA];
1523         struct snd_soc_dai_link *dai_link = &vc4_hdmi->audio.link;
1524         struct snd_soc_card *card = &vc4_hdmi->audio.card;
1525         struct device *dev = &vc4_hdmi->pdev->dev;
1526         const __be32 *addr;
1527         int index;
1528         int ret;
1529
1530         if (!of_find_property(dev->of_node, "dmas", NULL)) {
1531                 dev_warn(dev,
1532                          "'dmas' DT property is missing, no HDMI audio\n");
1533                 return 0;
1534         }
1535
1536         if (mai_data->reg != VC4_HD) {
1537                 WARN_ONCE(true, "MAI isn't in the HD block\n");
1538                 return -EINVAL;
1539         }
1540
1541         /*
1542          * Get the physical address of VC4_HD_MAI_DATA. We need to retrieve
1543          * the bus address specified in the DT, because the physical address
1544          * (the one returned by platform_get_resource()) is not appropriate
1545          * for DMA transfers.
1546          * This VC/MMU should probably be exposed to avoid this kind of hacks.
1547          */
1548         index = of_property_match_string(dev->of_node, "reg-names", "hd");
1549         /* Before BCM2711, we don't have a named register range */
1550         if (index < 0)
1551                 index = 1;
1552
1553         addr = of_get_address(dev->of_node, index, NULL, NULL);
1554
1555         vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset;
1556         vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1557         vc4_hdmi->audio.dma_data.maxburst = 2;
1558
1559         ret = devm_snd_dmaengine_pcm_register(dev, &pcm_conf, 0);
1560         if (ret) {
1561                 dev_err(dev, "Could not register PCM component: %d\n", ret);
1562                 return ret;
1563         }
1564
1565         ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_cpu_dai_comp,
1566                                               &vc4_hdmi_audio_cpu_dai_drv, 1);
1567         if (ret) {
1568                 dev_err(dev, "Could not register CPU DAI: %d\n", ret);
1569                 return ret;
1570         }
1571
1572         /* register component and codec dai */
1573         ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_component_drv,
1574                                      &vc4_hdmi_audio_codec_dai_drv, 1);
1575         if (ret) {
1576                 dev_err(dev, "Could not register component: %d\n", ret);
1577                 return ret;
1578         }
1579
1580         dai_link->cpus          = &vc4_hdmi->audio.cpu;
1581         dai_link->codecs        = &vc4_hdmi->audio.codec;
1582         dai_link->platforms     = &vc4_hdmi->audio.platform;
1583
1584         dai_link->num_cpus      = 1;
1585         dai_link->num_codecs    = 1;
1586         dai_link->num_platforms = 1;
1587
1588         dai_link->name = "MAI";
1589         dai_link->stream_name = "MAI PCM";
1590         dai_link->codecs->dai_name = vc4_hdmi_audio_codec_dai_drv.name;
1591         dai_link->cpus->dai_name = dev_name(dev);
1592         dai_link->codecs->name = dev_name(dev);
1593         dai_link->platforms->name = dev_name(dev);
1594
1595         card->dai_link = dai_link;
1596         card->num_links = 1;
1597         card->name = vc4_hdmi->variant->card_name;
1598         card->driver_name = "vc4-hdmi";
1599         card->dev = dev;
1600         card->owner = THIS_MODULE;
1601
1602         /*
1603          * Be careful, snd_soc_register_card() calls dev_set_drvdata() and
1604          * stores a pointer to the snd card object in dev->driver_data. This
1605          * means we cannot use it for something else. The hdmi back-pointer is
1606          * now stored in card->drvdata and should be retrieved with
1607          * snd_soc_card_get_drvdata() if needed.
1608          */
1609         snd_soc_card_set_drvdata(card, vc4_hdmi);
1610         ret = devm_snd_soc_register_card(dev, card);
1611         if (ret)
1612                 dev_err(dev, "Could not register sound card: %d\n", ret);
1613
1614         return ret;
1615
1616 }
1617
1618 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1619 static irqreturn_t vc4_cec_irq_handler_rx_thread(int irq, void *priv)
1620 {
1621         struct vc4_hdmi *vc4_hdmi = priv;
1622
1623         if (vc4_hdmi->cec_rx_msg.len)
1624                 cec_received_msg(vc4_hdmi->cec_adap,
1625                                  &vc4_hdmi->cec_rx_msg);
1626
1627         return IRQ_HANDLED;
1628 }
1629
1630 static irqreturn_t vc4_cec_irq_handler_tx_thread(int irq, void *priv)
1631 {
1632         struct vc4_hdmi *vc4_hdmi = priv;
1633
1634         if (vc4_hdmi->cec_tx_ok) {
1635                 cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_OK,
1636                                   0, 0, 0, 0);
1637         } else {
1638                 /*
1639                  * This CEC implementation makes 1 retry, so if we
1640                  * get a NACK, then that means it made 2 attempts.
1641                  */
1642                 cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_NACK,
1643                                   0, 2, 0, 0);
1644         }
1645         return IRQ_HANDLED;
1646 }
1647
1648 static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
1649 {
1650         struct vc4_hdmi *vc4_hdmi = priv;
1651         irqreturn_t ret;
1652
1653         if (vc4_hdmi->cec_irq_was_rx)
1654                 ret = vc4_cec_irq_handler_rx_thread(irq, priv);
1655         else
1656                 ret = vc4_cec_irq_handler_tx_thread(irq, priv);
1657
1658         return ret;
1659 }
1660
1661 static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1)
1662 {
1663         struct drm_device *dev = vc4_hdmi->connector.dev;
1664         struct cec_msg *msg = &vc4_hdmi->cec_rx_msg;
1665         unsigned int i;
1666
1667         msg->len = 1 + ((cntrl1 & VC4_HDMI_CEC_REC_WRD_CNT_MASK) >>
1668                                         VC4_HDMI_CEC_REC_WRD_CNT_SHIFT);
1669
1670         if (msg->len > 16) {
1671                 drm_err(dev, "Attempting to read too much data (%d)\n", msg->len);
1672                 return;
1673         }
1674
1675         for (i = 0; i < msg->len; i += 4) {
1676                 u32 val = HDMI_READ(HDMI_CEC_RX_DATA_1 + (i >> 2));
1677
1678                 msg->msg[i] = val & 0xff;
1679                 msg->msg[i + 1] = (val >> 8) & 0xff;
1680                 msg->msg[i + 2] = (val >> 16) & 0xff;
1681                 msg->msg[i + 3] = (val >> 24) & 0xff;
1682         }
1683 }
1684
1685 static irqreturn_t vc4_cec_irq_handler_tx_bare(int irq, void *priv)
1686 {
1687         struct vc4_hdmi *vc4_hdmi = priv;
1688         u32 cntrl1;
1689
1690         cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
1691         vc4_hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD;
1692         cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
1693         HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
1694
1695         return IRQ_WAKE_THREAD;
1696 }
1697
1698 static irqreturn_t vc4_cec_irq_handler_rx_bare(int irq, void *priv)
1699 {
1700         struct vc4_hdmi *vc4_hdmi = priv;
1701         u32 cntrl1;
1702
1703         vc4_hdmi->cec_rx_msg.len = 0;
1704         cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
1705         vc4_cec_read_msg(vc4_hdmi, cntrl1);
1706         cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
1707         HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
1708         cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
1709
1710         HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
1711
1712         return IRQ_WAKE_THREAD;
1713 }
1714
1715 static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
1716 {
1717         struct vc4_hdmi *vc4_hdmi = priv;
1718         u32 stat = HDMI_READ(HDMI_CEC_CPU_STATUS);
1719         irqreturn_t ret;
1720         u32 cntrl5;
1721
1722         if (!(stat & VC4_HDMI_CPU_CEC))
1723                 return IRQ_NONE;
1724
1725         cntrl5 = HDMI_READ(HDMI_CEC_CNTRL_5);
1726         vc4_hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT;
1727         if (vc4_hdmi->cec_irq_was_rx)
1728                 ret = vc4_cec_irq_handler_rx_bare(irq, priv);
1729         else
1730                 ret = vc4_cec_irq_handler_tx_bare(irq, priv);
1731
1732         HDMI_WRITE(HDMI_CEC_CPU_CLEAR, VC4_HDMI_CPU_CEC);
1733         return ret;
1734 }
1735
1736 static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
1737 {
1738         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
1739         /* clock period in microseconds */
1740         const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
1741         u32 val = HDMI_READ(HDMI_CEC_CNTRL_5);
1742
1743         val &= ~(VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET |
1744                  VC4_HDMI_CEC_CNT_TO_4700_US_MASK |
1745                  VC4_HDMI_CEC_CNT_TO_4500_US_MASK);
1746         val |= ((4700 / usecs) << VC4_HDMI_CEC_CNT_TO_4700_US_SHIFT) |
1747                ((4500 / usecs) << VC4_HDMI_CEC_CNT_TO_4500_US_SHIFT);
1748
1749         if (enable) {
1750                 HDMI_WRITE(HDMI_CEC_CNTRL_5, val |
1751                            VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
1752                 HDMI_WRITE(HDMI_CEC_CNTRL_5, val);
1753                 HDMI_WRITE(HDMI_CEC_CNTRL_2,
1754                            ((1500 / usecs) << VC4_HDMI_CEC_CNT_TO_1500_US_SHIFT) |
1755                            ((1300 / usecs) << VC4_HDMI_CEC_CNT_TO_1300_US_SHIFT) |
1756                            ((800 / usecs) << VC4_HDMI_CEC_CNT_TO_800_US_SHIFT) |
1757                            ((600 / usecs) << VC4_HDMI_CEC_CNT_TO_600_US_SHIFT) |
1758                            ((400 / usecs) << VC4_HDMI_CEC_CNT_TO_400_US_SHIFT));
1759                 HDMI_WRITE(HDMI_CEC_CNTRL_3,
1760                            ((2750 / usecs) << VC4_HDMI_CEC_CNT_TO_2750_US_SHIFT) |
1761                            ((2400 / usecs) << VC4_HDMI_CEC_CNT_TO_2400_US_SHIFT) |
1762                            ((2050 / usecs) << VC4_HDMI_CEC_CNT_TO_2050_US_SHIFT) |
1763                            ((1700 / usecs) << VC4_HDMI_CEC_CNT_TO_1700_US_SHIFT));
1764                 HDMI_WRITE(HDMI_CEC_CNTRL_4,
1765                            ((4300 / usecs) << VC4_HDMI_CEC_CNT_TO_4300_US_SHIFT) |
1766                            ((3900 / usecs) << VC4_HDMI_CEC_CNT_TO_3900_US_SHIFT) |
1767                            ((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) |
1768                            ((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT));
1769
1770                 if (!vc4_hdmi->variant->external_irq_controller)
1771                         HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
1772         } else {
1773                 if (!vc4_hdmi->variant->external_irq_controller)
1774                         HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
1775                 HDMI_WRITE(HDMI_CEC_CNTRL_5, val |
1776                            VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
1777         }
1778         return 0;
1779 }
1780
1781 static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
1782 {
1783         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
1784
1785         HDMI_WRITE(HDMI_CEC_CNTRL_1,
1786                    (HDMI_READ(HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) |
1787                    (log_addr & 0xf) << VC4_HDMI_CEC_ADDR_SHIFT);
1788         return 0;
1789 }
1790
1791 static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
1792                                       u32 signal_free_time, struct cec_msg *msg)
1793 {
1794         struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
1795         struct drm_device *dev = vc4_hdmi->connector.dev;
1796         u32 val;
1797         unsigned int i;
1798
1799         if (msg->len > 16) {
1800                 drm_err(dev, "Attempting to transmit too much data (%d)\n", msg->len);
1801                 return -ENOMEM;
1802         }
1803
1804         for (i = 0; i < msg->len; i += 4)
1805                 HDMI_WRITE(HDMI_CEC_TX_DATA_1 + (i >> 2),
1806                            (msg->msg[i]) |
1807                            (msg->msg[i + 1] << 8) |
1808                            (msg->msg[i + 2] << 16) |
1809                            (msg->msg[i + 3] << 24));
1810
1811         val = HDMI_READ(HDMI_CEC_CNTRL_1);
1812         val &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
1813         HDMI_WRITE(HDMI_CEC_CNTRL_1, val);
1814         val &= ~VC4_HDMI_CEC_MESSAGE_LENGTH_MASK;
1815         val |= (msg->len - 1) << VC4_HDMI_CEC_MESSAGE_LENGTH_SHIFT;
1816         val |= VC4_HDMI_CEC_START_XMIT_BEGIN;
1817
1818         HDMI_WRITE(HDMI_CEC_CNTRL_1, val);
1819         return 0;
1820 }
1821
1822 static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = {
1823         .adap_enable = vc4_hdmi_cec_adap_enable,
1824         .adap_log_addr = vc4_hdmi_cec_adap_log_addr,
1825         .adap_transmit = vc4_hdmi_cec_adap_transmit,
1826 };
1827
1828 static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
1829 {
1830         struct cec_connector_info conn_info;
1831         struct platform_device *pdev = vc4_hdmi->pdev;
1832         struct device *dev = &pdev->dev;
1833         u32 value;
1834         int ret;
1835
1836         if (!of_find_property(dev->of_node, "interrupts", NULL)) {
1837                 dev_warn(dev, "'interrupts' DT property is missing, no CEC\n");
1838                 return 0;
1839         }
1840
1841         vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
1842                                                   vc4_hdmi, "vc4",
1843                                                   CEC_CAP_DEFAULTS |
1844                                                   CEC_CAP_CONNECTOR_INFO, 1);
1845         ret = PTR_ERR_OR_ZERO(vc4_hdmi->cec_adap);
1846         if (ret < 0)
1847                 return ret;
1848
1849         cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector);
1850         cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info);
1851
1852         value = HDMI_READ(HDMI_CEC_CNTRL_1);
1853         /* Set the logical address to Unregistered */
1854         value |= VC4_HDMI_CEC_ADDR_MASK;
1855         HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
1856
1857         vc4_hdmi_cec_update_clk_div(vc4_hdmi);
1858
1859         if (vc4_hdmi->variant->external_irq_controller) {
1860                 ret = request_threaded_irq(platform_get_irq_byname(pdev, "cec-rx"),
1861                                            vc4_cec_irq_handler_rx_bare,
1862                                            vc4_cec_irq_handler_rx_thread, 0,
1863                                            "vc4 hdmi cec rx", vc4_hdmi);
1864                 if (ret)
1865                         goto err_delete_cec_adap;
1866
1867                 ret = request_threaded_irq(platform_get_irq_byname(pdev, "cec-tx"),
1868                                            vc4_cec_irq_handler_tx_bare,
1869                                            vc4_cec_irq_handler_tx_thread, 0,
1870                                            "vc4 hdmi cec tx", vc4_hdmi);
1871                 if (ret)
1872                         goto err_remove_cec_rx_handler;
1873         } else {
1874                 HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
1875
1876                 ret = request_threaded_irq(platform_get_irq(pdev, 0),
1877                                            vc4_cec_irq_handler,
1878                                            vc4_cec_irq_handler_thread, 0,
1879                                            "vc4 hdmi cec", vc4_hdmi);
1880                 if (ret)
1881                         goto err_delete_cec_adap;
1882         }
1883
1884         ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev);
1885         if (ret < 0)
1886                 goto err_remove_handlers;
1887
1888         return 0;
1889
1890 err_remove_handlers:
1891         if (vc4_hdmi->variant->external_irq_controller)
1892                 free_irq(platform_get_irq_byname(pdev, "cec-tx"), vc4_hdmi);
1893         else
1894                 free_irq(platform_get_irq(pdev, 0), vc4_hdmi);
1895
1896 err_remove_cec_rx_handler:
1897         if (vc4_hdmi->variant->external_irq_controller)
1898                 free_irq(platform_get_irq_byname(pdev, "cec-rx"), vc4_hdmi);
1899
1900 err_delete_cec_adap:
1901         cec_delete_adapter(vc4_hdmi->cec_adap);
1902
1903         return ret;
1904 }
1905
1906 static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi)
1907 {
1908         struct platform_device *pdev = vc4_hdmi->pdev;
1909
1910         if (vc4_hdmi->variant->external_irq_controller) {
1911                 free_irq(platform_get_irq_byname(pdev, "cec-rx"), vc4_hdmi);
1912                 free_irq(platform_get_irq_byname(pdev, "cec-tx"), vc4_hdmi);
1913         } else {
1914                 free_irq(platform_get_irq(pdev, 0), vc4_hdmi);
1915         }
1916
1917         cec_unregister_adapter(vc4_hdmi->cec_adap);
1918 }
1919 #else
1920 static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
1921 {
1922         return 0;
1923 }
1924
1925 static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi) {};
1926
1927 #endif
1928
1929 static int vc4_hdmi_build_regset(struct vc4_hdmi *vc4_hdmi,
1930                                  struct debugfs_regset32 *regset,
1931                                  enum vc4_hdmi_regs reg)
1932 {
1933         const struct vc4_hdmi_variant *variant = vc4_hdmi->variant;
1934         struct debugfs_reg32 *regs, *new_regs;
1935         unsigned int count = 0;
1936         unsigned int i;
1937
1938         regs = kcalloc(variant->num_registers, sizeof(*regs),
1939                        GFP_KERNEL);
1940         if (!regs)
1941                 return -ENOMEM;
1942
1943         for (i = 0; i < variant->num_registers; i++) {
1944                 const struct vc4_hdmi_register *field = &variant->registers[i];
1945
1946                 if (field->reg != reg)
1947                         continue;
1948
1949                 regs[count].name = field->name;
1950                 regs[count].offset = field->offset;
1951                 count++;
1952         }
1953
1954         new_regs = krealloc(regs, count * sizeof(*regs), GFP_KERNEL);
1955         if (!new_regs)
1956                 return -ENOMEM;
1957
1958         regset->base = __vc4_hdmi_get_field_base(vc4_hdmi, reg);
1959         regset->regs = new_regs;
1960         regset->nregs = count;
1961
1962         return 0;
1963 }
1964
1965 static int vc4_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi)
1966 {
1967         struct platform_device *pdev = vc4_hdmi->pdev;
1968         struct device *dev = &pdev->dev;
1969         int ret;
1970
1971         vc4_hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0);
1972         if (IS_ERR(vc4_hdmi->hdmicore_regs))
1973                 return PTR_ERR(vc4_hdmi->hdmicore_regs);
1974
1975         vc4_hdmi->hd_regs = vc4_ioremap_regs(pdev, 1);
1976         if (IS_ERR(vc4_hdmi->hd_regs))
1977                 return PTR_ERR(vc4_hdmi->hd_regs);
1978
1979         ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->hd_regset, VC4_HD);
1980         if (ret)
1981                 return ret;
1982
1983         ret = vc4_hdmi_build_regset(vc4_hdmi, &vc4_hdmi->hdmi_regset, VC4_HDMI);
1984         if (ret)
1985                 return ret;
1986
1987         vc4_hdmi->pixel_clock = devm_clk_get(dev, "pixel");
1988         if (IS_ERR(vc4_hdmi->pixel_clock)) {
1989                 ret = PTR_ERR(vc4_hdmi->pixel_clock);
1990                 if (ret != -EPROBE_DEFER)
1991                         DRM_ERROR("Failed to get pixel clock\n");
1992                 return ret;
1993         }
1994
1995         vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
1996         if (IS_ERR(vc4_hdmi->hsm_clock)) {
1997                 DRM_ERROR("Failed to get HDMI state machine clock\n");
1998                 return PTR_ERR(vc4_hdmi->hsm_clock);
1999         }
2000         vc4_hdmi->audio_clock = vc4_hdmi->hsm_clock;
2001         vc4_hdmi->cec_clock = vc4_hdmi->hsm_clock;
2002
2003         return 0;
2004 }
2005
2006 static int vc5_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi)
2007 {
2008         struct platform_device *pdev = vc4_hdmi->pdev;
2009         struct device *dev = &pdev->dev;
2010         struct resource *res;
2011
2012         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi");
2013         if (!res)
2014                 return -ENODEV;
2015
2016         vc4_hdmi->hdmicore_regs = devm_ioremap(dev, res->start,
2017                                                resource_size(res));
2018         if (!vc4_hdmi->hdmicore_regs)
2019                 return -ENOMEM;
2020
2021         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hd");
2022         if (!res)
2023                 return -ENODEV;
2024
2025         vc4_hdmi->hd_regs = devm_ioremap(dev, res->start, resource_size(res));
2026         if (!vc4_hdmi->hd_regs)
2027                 return -ENOMEM;
2028
2029         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cec");
2030         if (!res)
2031                 return -ENODEV;
2032
2033         vc4_hdmi->cec_regs = devm_ioremap(dev, res->start, resource_size(res));
2034         if (!vc4_hdmi->cec_regs)
2035                 return -ENOMEM;
2036
2037         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csc");
2038         if (!res)
2039                 return -ENODEV;
2040
2041         vc4_hdmi->csc_regs = devm_ioremap(dev, res->start, resource_size(res));
2042         if (!vc4_hdmi->csc_regs)
2043                 return -ENOMEM;
2044
2045         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvp");
2046         if (!res)
2047                 return -ENODEV;
2048
2049         vc4_hdmi->dvp_regs = devm_ioremap(dev, res->start, resource_size(res));
2050         if (!vc4_hdmi->dvp_regs)
2051                 return -ENOMEM;
2052
2053         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
2054         if (!res)
2055                 return -ENODEV;
2056
2057         vc4_hdmi->phy_regs = devm_ioremap(dev, res->start, resource_size(res));
2058         if (!vc4_hdmi->phy_regs)
2059                 return -ENOMEM;
2060
2061         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "packet");
2062         if (!res)
2063                 return -ENODEV;
2064
2065         vc4_hdmi->ram_regs = devm_ioremap(dev, res->start, resource_size(res));
2066         if (!vc4_hdmi->ram_regs)
2067                 return -ENOMEM;
2068
2069         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rm");
2070         if (!res)
2071                 return -ENODEV;
2072
2073         vc4_hdmi->rm_regs = devm_ioremap(dev, res->start, resource_size(res));
2074         if (!vc4_hdmi->rm_regs)
2075                 return -ENOMEM;
2076
2077         vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
2078         if (IS_ERR(vc4_hdmi->hsm_clock)) {
2079                 DRM_ERROR("Failed to get HDMI state machine clock\n");
2080                 return PTR_ERR(vc4_hdmi->hsm_clock);
2081         }
2082
2083         vc4_hdmi->pixel_bvb_clock = devm_clk_get(dev, "bvb");
2084         if (IS_ERR(vc4_hdmi->pixel_bvb_clock)) {
2085                 DRM_ERROR("Failed to get pixel bvb clock\n");
2086                 return PTR_ERR(vc4_hdmi->pixel_bvb_clock);
2087         }
2088
2089         vc4_hdmi->audio_clock = devm_clk_get(dev, "audio");
2090         if (IS_ERR(vc4_hdmi->audio_clock)) {
2091                 DRM_ERROR("Failed to get audio clock\n");
2092                 return PTR_ERR(vc4_hdmi->audio_clock);
2093         }
2094
2095         vc4_hdmi->cec_clock = devm_clk_get(dev, "cec");
2096         if (IS_ERR(vc4_hdmi->cec_clock)) {
2097                 DRM_ERROR("Failed to get CEC clock\n");
2098                 return PTR_ERR(vc4_hdmi->cec_clock);
2099         }
2100
2101         vc4_hdmi->reset = devm_reset_control_get(dev, NULL);
2102         if (IS_ERR(vc4_hdmi->reset)) {
2103                 DRM_ERROR("Failed to get HDMI reset line\n");
2104                 return PTR_ERR(vc4_hdmi->reset);
2105         }
2106
2107         return 0;
2108 }
2109
2110 #ifdef CONFIG_PM
2111 static int vc4_hdmi_runtime_suspend(struct device *dev)
2112 {
2113         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
2114
2115         clk_disable_unprepare(vc4_hdmi->hsm_clock);
2116
2117         return 0;
2118 }
2119
2120 static int vc4_hdmi_runtime_resume(struct device *dev)
2121 {
2122         struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
2123         int ret;
2124
2125         ret = clk_prepare_enable(vc4_hdmi->hsm_clock);
2126         if (ret)
2127                 return ret;
2128
2129         return 0;
2130 }
2131 #endif
2132
2133 static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
2134 {
2135         const struct vc4_hdmi_variant *variant = of_device_get_match_data(dev);
2136         struct platform_device *pdev = to_platform_device(dev);
2137         struct drm_device *drm = dev_get_drvdata(master);
2138         struct vc4_hdmi *vc4_hdmi;
2139         struct drm_encoder *encoder;
2140         struct device_node *ddc_node;
2141         int ret;
2142
2143         vc4_hdmi = devm_kzalloc(dev, sizeof(*vc4_hdmi), GFP_KERNEL);
2144         if (!vc4_hdmi)
2145                 return -ENOMEM;
2146         INIT_DELAYED_WORK(&vc4_hdmi->scrambling_work, vc4_hdmi_scrambling_wq);
2147
2148         dev_set_drvdata(dev, vc4_hdmi);
2149         encoder = &vc4_hdmi->encoder.base.base;
2150         vc4_hdmi->encoder.base.type = variant->encoder_type;
2151         vc4_hdmi->encoder.base.pre_crtc_configure = vc4_hdmi_encoder_pre_crtc_configure;
2152         vc4_hdmi->encoder.base.pre_crtc_enable = vc4_hdmi_encoder_pre_crtc_enable;
2153         vc4_hdmi->encoder.base.post_crtc_enable = vc4_hdmi_encoder_post_crtc_enable;
2154         vc4_hdmi->encoder.base.post_crtc_disable = vc4_hdmi_encoder_post_crtc_disable;
2155         vc4_hdmi->encoder.base.post_crtc_powerdown = vc4_hdmi_encoder_post_crtc_powerdown;
2156         vc4_hdmi->pdev = pdev;
2157         vc4_hdmi->variant = variant;
2158
2159         ret = variant->init_resources(vc4_hdmi);
2160         if (ret)
2161                 return ret;
2162
2163         ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
2164         if (!ddc_node) {
2165                 DRM_ERROR("Failed to find ddc node in device tree\n");
2166                 return -ENODEV;
2167         }
2168
2169         vc4_hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
2170         of_node_put(ddc_node);
2171         if (!vc4_hdmi->ddc) {
2172                 DRM_DEBUG("Failed to get ddc i2c adapter by node\n");
2173                 return -EPROBE_DEFER;
2174         }
2175
2176         /* Only use the GPIO HPD pin if present in the DT, otherwise
2177          * we'll use the HDMI core's register.
2178          */
2179         vc4_hdmi->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
2180         if (IS_ERR(vc4_hdmi->hpd_gpio)) {
2181                 ret = PTR_ERR(vc4_hdmi->hpd_gpio);
2182                 goto err_put_ddc;
2183         }
2184
2185         vc4_hdmi->disable_wifi_frequencies =
2186                 of_property_read_bool(dev->of_node, "wifi-2.4ghz-coexistence");
2187
2188         if (variant->max_pixel_clock == 600000000) {
2189                 struct vc4_dev *vc4 = to_vc4_dev(drm);
2190                 long max_rate = clk_round_rate(vc4->hvs->core_clk, 550000000);
2191
2192                 if (max_rate < 550000000)
2193                         vc4_hdmi->disable_4kp60 = true;
2194         }
2195
2196         if (vc4_hdmi->variant->reset)
2197                 vc4_hdmi->variant->reset(vc4_hdmi);
2198
2199         if ((of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi0") ||
2200              of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi1")) &&
2201             HDMI_READ(HDMI_VID_CTL) & VC4_HD_VID_CTL_ENABLE) {
2202                 clk_prepare_enable(vc4_hdmi->pixel_clock);
2203                 clk_prepare_enable(vc4_hdmi->hsm_clock);
2204                 clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
2205         }
2206
2207         pm_runtime_enable(dev);
2208
2209         drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
2210         drm_encoder_helper_add(encoder, &vc4_hdmi_encoder_helper_funcs);
2211
2212         ret = vc4_hdmi_connector_init(drm, vc4_hdmi);
2213         if (ret)
2214                 goto err_destroy_encoder;
2215
2216         ret = vc4_hdmi_cec_init(vc4_hdmi);
2217         if (ret)
2218                 goto err_destroy_conn;
2219
2220         ret = vc4_hdmi_audio_init(vc4_hdmi);
2221         if (ret)
2222                 goto err_free_cec;
2223
2224         vc4_debugfs_add_file(drm, variant->debugfs_name,
2225                              vc4_hdmi_debugfs_regs,
2226                              vc4_hdmi);
2227
2228         return 0;
2229
2230 err_free_cec:
2231         vc4_hdmi_cec_exit(vc4_hdmi);
2232 err_destroy_conn:
2233         vc4_hdmi_connector_destroy(&vc4_hdmi->connector);
2234 err_destroy_encoder:
2235         drm_encoder_cleanup(encoder);
2236         pm_runtime_disable(dev);
2237 err_put_ddc:
2238         put_device(&vc4_hdmi->ddc->dev);
2239
2240         return ret;
2241 }
2242
2243 static void vc4_hdmi_unbind(struct device *dev, struct device *master,
2244                             void *data)
2245 {
2246         struct vc4_hdmi *vc4_hdmi;
2247
2248         /*
2249          * ASoC makes it a bit hard to retrieve a pointer to the
2250          * vc4_hdmi structure. Registering the card will overwrite our
2251          * device drvdata with a pointer to the snd_soc_card structure,
2252          * which can then be used to retrieve whatever drvdata we want
2253          * to associate.
2254          *
2255          * However, that doesn't fly in the case where we wouldn't
2256          * register an ASoC card (because of an old DT that is missing
2257          * the dmas properties for example), then the card isn't
2258          * registered and the device drvdata wouldn't be set.
2259          *
2260          * We can deal with both cases by making sure a snd_soc_card
2261          * pointer and a vc4_hdmi structure are pointing to the same
2262          * memory address, so we can treat them indistinctly without any
2263          * issue.
2264          */
2265         BUILD_BUG_ON(offsetof(struct vc4_hdmi_audio, card) != 0);
2266         BUILD_BUG_ON(offsetof(struct vc4_hdmi, audio) != 0);
2267         vc4_hdmi = dev_get_drvdata(dev);
2268
2269         kfree(vc4_hdmi->hdmi_regset.regs);
2270         kfree(vc4_hdmi->hd_regset.regs);
2271
2272         vc4_hdmi_cec_exit(vc4_hdmi);
2273         vc4_hdmi_connector_destroy(&vc4_hdmi->connector);
2274         drm_encoder_cleanup(&vc4_hdmi->encoder.base.base);
2275
2276         pm_runtime_disable(dev);
2277
2278         put_device(&vc4_hdmi->ddc->dev);
2279 }
2280
2281 static const struct component_ops vc4_hdmi_ops = {
2282         .bind   = vc4_hdmi_bind,
2283         .unbind = vc4_hdmi_unbind,
2284 };
2285
2286 static int vc4_hdmi_dev_probe(struct platform_device *pdev)
2287 {
2288         return component_add(&pdev->dev, &vc4_hdmi_ops);
2289 }
2290
2291 static int vc4_hdmi_dev_remove(struct platform_device *pdev)
2292 {
2293         component_del(&pdev->dev, &vc4_hdmi_ops);
2294         return 0;
2295 }
2296
2297 static const struct vc4_hdmi_variant bcm2835_variant = {
2298         .encoder_type           = VC4_ENCODER_TYPE_HDMI0,
2299         .debugfs_name           = "hdmi_regs",
2300         .card_name              = "vc4-hdmi",
2301         .max_pixel_clock        = 162000000,
2302         .registers              = vc4_hdmi_fields,
2303         .num_registers          = ARRAY_SIZE(vc4_hdmi_fields),
2304
2305         .init_resources         = vc4_hdmi_init_resources,
2306         .csc_setup              = vc4_hdmi_csc_setup,
2307         .reset                  = vc4_hdmi_reset,
2308         .set_timings            = vc4_hdmi_set_timings,
2309         .phy_init               = vc4_hdmi_phy_init,
2310         .phy_disable            = vc4_hdmi_phy_disable,
2311         .phy_rng_enable         = vc4_hdmi_phy_rng_enable,
2312         .phy_rng_disable        = vc4_hdmi_phy_rng_disable,
2313         .channel_map            = vc4_hdmi_channel_map,
2314         .supports_hdr           = false,
2315 };
2316
2317 static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
2318         .encoder_type           = VC4_ENCODER_TYPE_HDMI0,
2319         .debugfs_name           = "hdmi0_regs",
2320         .card_name              = "vc4-hdmi-0",
2321         .max_pixel_clock        = HDMI_14_MAX_TMDS_CLK,
2322         .registers              = vc5_hdmi_hdmi0_fields,
2323         .num_registers          = ARRAY_SIZE(vc5_hdmi_hdmi0_fields),
2324         .phy_lane_mapping       = {
2325                 PHY_LANE_0,
2326                 PHY_LANE_1,
2327                 PHY_LANE_2,
2328                 PHY_LANE_CK,
2329         },
2330         .unsupported_odd_h_timings      = true,
2331         .external_irq_controller        = true,
2332
2333         .init_resources         = vc5_hdmi_init_resources,
2334         .csc_setup              = vc5_hdmi_csc_setup,
2335         .reset                  = vc5_hdmi_reset,
2336         .set_timings            = vc5_hdmi_set_timings,
2337         .phy_init               = vc5_hdmi_phy_init,
2338         .phy_disable            = vc5_hdmi_phy_disable,
2339         .phy_rng_enable         = vc5_hdmi_phy_rng_enable,
2340         .phy_rng_disable        = vc5_hdmi_phy_rng_disable,
2341         .channel_map            = vc5_hdmi_channel_map,
2342         .supports_hdr           = true,
2343 };
2344
2345 static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
2346         .encoder_type           = VC4_ENCODER_TYPE_HDMI1,
2347         .debugfs_name           = "hdmi1_regs",
2348         .card_name              = "vc4-hdmi-1",
2349         .max_pixel_clock        = HDMI_14_MAX_TMDS_CLK,
2350         .registers              = vc5_hdmi_hdmi1_fields,
2351         .num_registers          = ARRAY_SIZE(vc5_hdmi_hdmi1_fields),
2352         .phy_lane_mapping       = {
2353                 PHY_LANE_1,
2354                 PHY_LANE_0,
2355                 PHY_LANE_CK,
2356                 PHY_LANE_2,
2357         },
2358         .unsupported_odd_h_timings      = true,
2359         .external_irq_controller        = true,
2360
2361         .init_resources         = vc5_hdmi_init_resources,
2362         .csc_setup              = vc5_hdmi_csc_setup,
2363         .reset                  = vc5_hdmi_reset,
2364         .set_timings            = vc5_hdmi_set_timings,
2365         .phy_init               = vc5_hdmi_phy_init,
2366         .phy_disable            = vc5_hdmi_phy_disable,
2367         .phy_rng_enable         = vc5_hdmi_phy_rng_enable,
2368         .phy_rng_disable        = vc5_hdmi_phy_rng_disable,
2369         .channel_map            = vc5_hdmi_channel_map,
2370         .supports_hdr           = true,
2371 };
2372
2373 static const struct of_device_id vc4_hdmi_dt_match[] = {
2374         { .compatible = "brcm,bcm2835-hdmi", .data = &bcm2835_variant },
2375         { .compatible = "brcm,bcm2711-hdmi0", .data = &bcm2711_hdmi0_variant },
2376         { .compatible = "brcm,bcm2711-hdmi1", .data = &bcm2711_hdmi1_variant },
2377         {}
2378 };
2379
2380 static const struct dev_pm_ops vc4_hdmi_pm_ops = {
2381         SET_RUNTIME_PM_OPS(vc4_hdmi_runtime_suspend,
2382                            vc4_hdmi_runtime_resume,
2383                            NULL)
2384 };
2385
2386 struct platform_driver vc4_hdmi_driver = {
2387         .probe = vc4_hdmi_dev_probe,
2388         .remove = vc4_hdmi_dev_remove,
2389         .driver = {
2390                 .name = "vc4_hdmi",
2391                 .of_match_table = vc4_hdmi_dt_match,
2392                 .pm = &vc4_hdmi_pm_ops,
2393         },
2394 };