drivers/gpu/drm/i915/display/intel_lspcon.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  *
  24  */
  25
  26 #include <drm/display/drm_dp_dual_mode_helper.h>
  27 #include <drm/display/drm_hdmi_helper.h>
  28 #include <drm/drm_atomic_helper.h>
  29 #include <drm/drm_edid.h>
  30
  31 #include "i915_reg.h"
  32 #include "intel_de.h"
  33 #include "intel_display_types.h"
  34 #include "intel_dp.h"
  35 #include "intel_lspcon.h"
  36 #include "intel_hdmi.h"
  37
  38 /* LSPCON OUI Vendor ID(signatures) */
  39 #define LSPCON_VENDOR_PARADE_OUI 0x001CF8
  40 #define LSPCON_VENDOR_MCA_OUI 0x0060AD
  41
  42 #define DPCD_MCA_LSPCON_HDR_STATUS      0x70003
  43 #define DPCD_PARADE_LSPCON_HDR_STATUS   0x00511
  44
  45 /* AUX addresses to write MCA AVI IF */
  46 #define LSPCON_MCA_AVI_IF_WRITE_OFFSET 0x5C0
  47 #define LSPCON_MCA_AVI_IF_CTRL 0x5DF
  48 #define  LSPCON_MCA_AVI_IF_KICKOFF (1 << 0)
  49 #define  LSPCON_MCA_AVI_IF_HANDLED (1 << 1)
  50
  51 /* AUX addresses to write Parade AVI IF */
  52 #define LSPCON_PARADE_AVI_IF_WRITE_OFFSET 0x516
  53 #define LSPCON_PARADE_AVI_IF_CTRL 0x51E
  54 #define  LSPCON_PARADE_AVI_IF_KICKOFF (1 << 7)
  55 #define LSPCON_PARADE_AVI_IF_DATA_SIZE 32
  56
  57 static struct intel_dp *lspcon_to_intel_dp(struct intel_lspcon *lspcon)
  58 {
  59         struct intel_digital_port *dig_port =
  60                 container_of(lspcon, struct intel_digital_port, lspcon);
  61
  62         return &dig_port->dp;
  63 }
  64
  65 static const char *lspcon_mode_name(enum drm_lspcon_mode mode)
  66 {
  67         switch (mode) {
  68         case DRM_LSPCON_MODE_PCON:
  69                 return "PCON";
  70         case DRM_LSPCON_MODE_LS:
  71                 return "LS";
  72         case DRM_LSPCON_MODE_INVALID:
  73                 return "INVALID";
  74         default:
  75                 MISSING_CASE(mode);
  76                 return "INVALID";
  77         }
  78 }
  79
  80 static bool lspcon_detect_vendor(struct intel_lspcon *lspcon)
  81 {
  82         struct intel_dp *dp = lspcon_to_intel_dp(lspcon);
  83         struct drm_i915_private *i915 = dp_to_i915(dp);
  84         struct drm_dp_dpcd_ident *ident;
  85         u32 vendor_oui;
  86
  87         if (drm_dp_read_desc(&dp->aux, &dp->desc, drm_dp_is_branch(dp->dpcd))) {
  88                 drm_err(&i915->drm, "Can't read description\n");
  89                 return false;
  90         }
  91
  92         ident = &dp->desc.ident;
  93         vendor_oui = (ident->oui[0] << 16) | (ident->oui[1] << 8) |
  94                       ident->oui[2];
  95
  96         switch (vendor_oui) {
  97         case LSPCON_VENDOR_MCA_OUI:
  98                 lspcon->vendor = LSPCON_VENDOR_MCA;
  99                 drm_dbg_kms(&i915->drm, "Vendor: Mega Chips\n");
 100                 break;
 101
 102         case LSPCON_VENDOR_PARADE_OUI:
 103                 lspcon->vendor = LSPCON_VENDOR_PARADE;
 104                 drm_dbg_kms(&i915->drm, "Vendor: Parade Tech\n");
 105                 break;
 106
 107         default:
 108                 drm_err(&i915->drm, "Invalid/Unknown vendor OUI\n");
 109                 return false;
 110         }
 111
 112         return true;
 113 }
 114
 115 static u32 get_hdr_status_reg(struct intel_lspcon *lspcon)
 116 {
 117         if (lspcon->vendor == LSPCON_VENDOR_MCA)
 118                 return DPCD_MCA_LSPCON_HDR_STATUS;
 119         else
 120                 return DPCD_PARADE_LSPCON_HDR_STATUS;
 121 }
 122
 123 void lspcon_detect_hdr_capability(struct intel_lspcon *lspcon)
 124 {
 125         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 126         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 127         u8 hdr_caps;
 128         int ret;
 129
 130         ret = drm_dp_dpcd_read(&intel_dp->aux, get_hdr_status_reg(lspcon),
 131                                &hdr_caps, 1);
 132
 133         if (ret < 0) {
 134                 drm_dbg_kms(&i915->drm, "HDR capability detection failed\n");
 135                 lspcon->hdr_supported = false;
 136         } else if (hdr_caps & 0x1) {
 137                 drm_dbg_kms(&i915->drm, "LSPCON capable of HDR\n");
 138                 lspcon->hdr_supported = true;
 139         }
 140 }
 141
 142 static enum drm_lspcon_mode lspcon_get_current_mode(struct intel_lspcon *lspcon)
 143 {
 144         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 145         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 146         enum drm_lspcon_mode current_mode;
 147         struct i2c_adapter *adapter = &intel_dp->aux.ddc;
 148
 149         if (drm_lspcon_get_mode(intel_dp->aux.drm_dev, adapter, &current_mode)) {
 150                 drm_dbg_kms(&i915->drm, "Error reading LSPCON mode\n");
 151                 return DRM_LSPCON_MODE_INVALID;
 152         }
 153         return current_mode;
 154 }
 155
 156 static enum drm_lspcon_mode lspcon_wait_mode(struct intel_lspcon *lspcon,
 157                                              enum drm_lspcon_mode mode)
 158 {
 159         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 160         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 161         enum drm_lspcon_mode current_mode;
 162
 163         current_mode = lspcon_get_current_mode(lspcon);
 164         if (current_mode == mode)
 165                 goto out;
 166
 167         drm_dbg_kms(&i915->drm, "Waiting for LSPCON mode %s to settle\n",
 168                     lspcon_mode_name(mode));
 169
 170         wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode, 400);
 171         if (current_mode != mode)
 172                 drm_err(&i915->drm, "LSPCON mode hasn't settled\n");
 173
 174 out:
 175         drm_dbg_kms(&i915->drm, "Current LSPCON mode %s\n",
 176                     lspcon_mode_name(current_mode));
 177
 178         return current_mode;
 179 }
 180
 181 static int lspcon_change_mode(struct intel_lspcon *lspcon,
 182                               enum drm_lspcon_mode mode)
 183 {
 184         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 185         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 186         int err;
 187         enum drm_lspcon_mode current_mode;
 188         struct i2c_adapter *adapter = &intel_dp->aux.ddc;
 189
 190         err = drm_lspcon_get_mode(intel_dp->aux.drm_dev, adapter, &current_mode);
 191         if (err) {
 192                 drm_err(&i915->drm, "Error reading LSPCON mode\n");
 193                 return err;
 194         }
 195
 196         if (current_mode == mode) {
 197                 drm_dbg_kms(&i915->drm, "Current mode = desired LSPCON mode\n");
 198                 return 0;
 199         }
 200
 201         err = drm_lspcon_set_mode(intel_dp->aux.drm_dev, adapter, mode);
 202         if (err < 0) {
 203                 drm_err(&i915->drm, "LSPCON mode change failed\n");
 204                 return err;
 205         }
 206
 207         lspcon->mode = mode;
 208         drm_dbg_kms(&i915->drm, "LSPCON mode changed done\n");
 209         return 0;
 210 }
 211
 212 static bool lspcon_wake_native_aux_ch(struct intel_lspcon *lspcon)
 213 {
 214         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 215         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 216         u8 rev;
 217
 218         if (drm_dp_dpcd_readb(&lspcon_to_intel_dp(lspcon)->aux, DP_DPCD_REV,
 219                               &rev) != 1) {
 220                 drm_dbg_kms(&i915->drm, "Native AUX CH down\n");
 221                 return false;
 222         }
 223
 224         drm_dbg_kms(&i915->drm, "Native AUX CH up, DPCD version: %d.%d\n",
 225                     rev >> 4, rev & 0xf);
 226
 227         return true;
 228 }
 229
 230 static bool lspcon_probe(struct intel_lspcon *lspcon)
 231 {
 232         int retry;
 233         enum drm_dp_dual_mode_type adaptor_type;
 234         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 235         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 236         struct i2c_adapter *adapter = &intel_dp->aux.ddc;
 237         enum drm_lspcon_mode expected_mode;
 238
 239         expected_mode = lspcon_wake_native_aux_ch(lspcon) ?
 240                         DRM_LSPCON_MODE_PCON : DRM_LSPCON_MODE_LS;
 241
 242         /* Lets probe the adaptor and check its type */
 243         for (retry = 0; retry < 6; retry++) {
 244                 if (retry)
 245                         usleep_range(500, 1000);
 246
 247                 adaptor_type = drm_dp_dual_mode_detect(intel_dp->aux.drm_dev, adapter);
 248                 if (adaptor_type == DRM_DP_DUAL_MODE_LSPCON)
 249                         break;
 250         }
 251
 252         if (adaptor_type != DRM_DP_DUAL_MODE_LSPCON) {
 253                 drm_dbg_kms(&i915->drm, "No LSPCON detected, found %s\n",
 254                             drm_dp_get_dual_mode_type_name(adaptor_type));
 255                 return false;
 256         }
 257
 258         /* Yay ... got a LSPCON device */
 259         drm_dbg_kms(&i915->drm, "LSPCON detected\n");
 260         lspcon->mode = lspcon_wait_mode(lspcon, expected_mode);
 261
 262         /*
 263          * In the SW state machine, lets Put LSPCON in PCON mode only.
 264          * In this way, it will work with both HDMI 1.4 sinks as well as HDMI
 265          * 2.0 sinks.
 266          */
 267         if (lspcon->mode != DRM_LSPCON_MODE_PCON) {
 268                 if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON) < 0) {
 269                         drm_err(&i915->drm, "LSPCON mode change to PCON failed\n");
 270                         return false;
 271                 }
 272         }
 273         return true;
 274 }
 275
 276 static void lspcon_resume_in_pcon_wa(struct intel_lspcon *lspcon)
 277 {
 278         struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
 279         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 280         struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 281         unsigned long start = jiffies;
 282
 283         while (1) {
 284                 if (intel_digital_port_connected(&dig_port->base)) {
 285                         drm_dbg_kms(&i915->drm, "LSPCON recovering in PCON mode after %u ms\n",
 286                                     jiffies_to_msecs(jiffies - start));
 287                         return;
 288                 }
 289
 290                 if (time_after(jiffies, start + msecs_to_jiffies(1000)))
 291                         break;
 292
 293                 usleep_range(10000, 15000);
 294         }
 295
 296         drm_dbg_kms(&i915->drm, "LSPCON DP descriptor mismatch after resume\n");
 297 }
 298
 299 static bool lspcon_parade_fw_ready(struct drm_dp_aux *aux)
 300 {
 301         u8 avi_if_ctrl;
 302         u8 retry;
 303         ssize_t ret;
 304
 305         /* Check if LSPCON FW is ready for data */
 306         for (retry = 0; retry < 5; retry++) {
 307                 if (retry)
 308                         usleep_range(200, 300);
 309
 310                 ret = drm_dp_dpcd_read(aux, LSPCON_PARADE_AVI_IF_CTRL,
 311                                        &avi_if_ctrl, 1);
 312                 if (ret < 0) {
 313                         drm_err(aux->drm_dev, "Failed to read AVI IF control\n");
 314                         return false;
 315                 }
 316
 317                 if ((avi_if_ctrl & LSPCON_PARADE_AVI_IF_KICKOFF) == 0)
 318                         return true;
 319         }
 320
 321         drm_err(aux->drm_dev, "Parade FW not ready to accept AVI IF\n");
 322         return false;
 323 }
 324
 325 static bool _lspcon_parade_write_infoframe_blocks(struct drm_dp_aux *aux,
 326                                                   u8 *avi_buf)
 327 {
 328         u8 avi_if_ctrl;
 329         u8 block_count = 0;
 330         u8 *data;
 331         u16 reg;
 332         ssize_t ret;
 333
 334         while (block_count < 4) {
 335                 if (!lspcon_parade_fw_ready(aux)) {
 336                         drm_dbg_kms(aux->drm_dev, "LSPCON FW not ready, block %d\n",
 337                                     block_count);
 338                         return false;
 339                 }
 340
 341                 reg = LSPCON_PARADE_AVI_IF_WRITE_OFFSET;
 342                 data = avi_buf + block_count * 8;
 343                 ret = drm_dp_dpcd_write(aux, reg, data, 8);
 344                 if (ret < 0) {
 345                         drm_err(aux->drm_dev, "Failed to write AVI IF block %d\n",
 346                                 block_count);
 347                         return false;
 348                 }
 349
 350                 /*
 351                  * Once a block of data is written, we have to inform the FW
 352                  * about this by writing into avi infoframe control register:
 353                  * - set the kickoff bit[7] to 1
 354                  * - write the block no. to bits[1:0]
 355                  */
 356                 reg = LSPCON_PARADE_AVI_IF_CTRL;
 357                 avi_if_ctrl = LSPCON_PARADE_AVI_IF_KICKOFF | block_count;
 358                 ret = drm_dp_dpcd_write(aux, reg, &avi_if_ctrl, 1);
 359                 if (ret < 0) {
 360                         drm_err(aux->drm_dev, "Failed to update (0x%x), block %d\n",
 361                                 reg, block_count);
 362                         return false;
 363                 }
 364
 365                 block_count++;
 366         }
 367
 368         drm_dbg_kms(aux->drm_dev, "Wrote AVI IF blocks successfully\n");
 369         return true;
 370 }
 371
 372 static bool _lspcon_write_avi_infoframe_parade(struct drm_dp_aux *aux,
 373                                                const u8 *frame,
 374                                                ssize_t len)
 375 {
 376         u8 avi_if[LSPCON_PARADE_AVI_IF_DATA_SIZE] = {1, };
 377
 378         /*
 379          * Parade's frames contains 32 bytes of data, divided
 380          * into 4 frames:
 381          *      Token byte (first byte of first frame, must be non-zero)
 382          *      HB0 to HB2       from AVI IF (3 bytes header)
 383          *      PB0 to PB27 from AVI IF (28 bytes data)
 384          * So it should look like this
 385          *      first block: | <token> <HB0-HB2> <DB0-DB3> |
 386          *      next 3 blocks: |<DB4-DB11>|<DB12-DB19>|<DB20-DB28>|
 387          */
 388
 389         if (len > LSPCON_PARADE_AVI_IF_DATA_SIZE - 1) {
 390                 drm_err(aux->drm_dev, "Invalid length of infoframes\n");
 391                 return false;
 392         }
 393
 394         memcpy(&avi_if[1], frame, len);
 395
 396         if (!_lspcon_parade_write_infoframe_blocks(aux, avi_if)) {
 397                 drm_dbg_kms(aux->drm_dev, "Failed to write infoframe blocks\n");
 398                 return false;
 399         }
 400
 401         return true;
 402 }
 403
 404 static bool _lspcon_write_avi_infoframe_mca(struct drm_dp_aux *aux,
 405                                             const u8 *buffer, ssize_t len)
 406 {
 407         int ret;
 408         u32 val = 0;
 409         u32 retry;
 410         u16 reg;
 411         const u8 *data = buffer;
 412
 413         reg = LSPCON_MCA_AVI_IF_WRITE_OFFSET;
 414         while (val < len) {
 415                 /* DPCD write for AVI IF can fail on a slow FW day, so retry */
 416                 for (retry = 0; retry < 5; retry++) {
 417                         ret = drm_dp_dpcd_write(aux, reg, (void *)data, 1);
 418                         if (ret == 1) {
 419                                 break;
 420                         } else if (retry < 4) {
 421                                 mdelay(50);
 422                                 continue;
 423                         } else {
 424                                 drm_err(aux->drm_dev, "DPCD write failed at:0x%x\n", reg);
 425                                 return false;
 426                         }
 427                 }
 428                 val++; reg++; data++;
 429         }
 430
 431         val = 0;
 432         reg = LSPCON_MCA_AVI_IF_CTRL;
 433         ret = drm_dp_dpcd_read(aux, reg, &val, 1);
 434         if (ret < 0) {
 435                 drm_err(aux->drm_dev, "DPCD read failed, address 0x%x\n", reg);
 436                 return false;
 437         }
 438
 439         /* Indicate LSPCON chip about infoframe, clear bit 1 and set bit 0 */
 440         val &= ~LSPCON_MCA_AVI_IF_HANDLED;
 441         val |= LSPCON_MCA_AVI_IF_KICKOFF;
 442
 443         ret = drm_dp_dpcd_write(aux, reg, &val, 1);
 444         if (ret < 0) {
 445                 drm_err(aux->drm_dev, "DPCD read failed, address 0x%x\n", reg);
 446                 return false;
 447         }
 448
 449         val = 0;
 450         ret = drm_dp_dpcd_read(aux, reg, &val, 1);
 451         if (ret < 0) {
 452                 drm_err(aux->drm_dev, "DPCD read failed, address 0x%x\n", reg);
 453                 return false;
 454         }
 455
 456         if (val == LSPCON_MCA_AVI_IF_HANDLED)
 457                 drm_dbg_kms(aux->drm_dev, "AVI IF handled by FW\n");
 458
 459         return true;
 460 }
 461
 462 void lspcon_write_infoframe(struct intel_encoder *encoder,
 463                             const struct intel_crtc_state *crtc_state,
 464                             unsigned int type,
 465                             const void *frame, ssize_t len)
 466 {
 467         bool ret = true;
 468         struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 469         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 470         struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
 471
 472         switch (type) {
 473         case HDMI_INFOFRAME_TYPE_AVI:
 474                 if (lspcon->vendor == LSPCON_VENDOR_MCA)
 475                         ret = _lspcon_write_avi_infoframe_mca(&intel_dp->aux,
 476                                                               frame, len);
 477                 else
 478                         ret = _lspcon_write_avi_infoframe_parade(&intel_dp->aux,
 479                                                                  frame, len);
 480                 break;
 481         case HDMI_PACKET_TYPE_GAMUT_METADATA:
 482                 drm_dbg_kms(&i915->drm, "Update HDR metadata for lspcon\n");
 483                 /* It uses the legacy hsw implementation for the same */
 484                 hsw_write_infoframe(encoder, crtc_state, type, frame, len);
 485                 break;
 486         default:
 487                 return;
 488         }
 489
 490         if (!ret) {
 491                 drm_err(&i915->drm, "Failed to write infoframes\n");
 492                 return;
 493         }
 494 }
 495
 496 void lspcon_read_infoframe(struct intel_encoder *encoder,
 497                            const struct intel_crtc_state *crtc_state,
 498                            unsigned int type,
 499                            void *frame, ssize_t len)
 500 {
 501         /* FIXME implement for AVI Infoframe as well */
 502         if (type == HDMI_PACKET_TYPE_GAMUT_METADATA)
 503                 hsw_read_infoframe(encoder, crtc_state, type,
 504                                    frame, len);
 505 }
 506
 507 void lspcon_set_infoframes(struct intel_encoder *encoder,
 508                            bool enable,
 509                            const struct intel_crtc_state *crtc_state,
 510                            const struct drm_connector_state *conn_state)
 511 {
 512         ssize_t ret;
 513         union hdmi_infoframe frame;
 514         u8 buf[VIDEO_DIP_DATA_SIZE];
 515         struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 516         struct intel_lspcon *lspcon = &dig_port->lspcon;
 517         struct drm_i915_private *i915 = to_i915(encoder->base.dev);
 518         const struct drm_display_mode *adjusted_mode =
 519                 &crtc_state->hw.adjusted_mode;
 520
 521         if (!lspcon->active) {
 522                 drm_err(&i915->drm, "Writing infoframes while LSPCON disabled ?\n");
 523                 return;
 524         }
 525
 526         /* FIXME precompute infoframes */
 527
 528         ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
 529                                                        conn_state->connector,
 530                                                        adjusted_mode);
 531         if (ret < 0) {
 532                 drm_err(&i915->drm, "couldn't fill AVI infoframe\n");
 533                 return;
 534         }
 535
 536         /*
 537          * Currently there is no interface defined to
 538          * check user preference between RGB/YCBCR444
 539          * or YCBCR420. So the only possible case for
 540          * YCBCR444 usage is driving YCBCR420 output
 541          * with LSPCON, when pipe is configured for
 542          * YCBCR444 output and LSPCON takes care of
 543          * downsampling it.
 544          */
 545         if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444)
 546                 frame.avi.colorspace = HDMI_COLORSPACE_YUV420;
 547         else
 548                 frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 549
 550         /* Set the Colorspace as per the HDMI spec */
 551         drm_hdmi_avi_infoframe_colorimetry(&frame.avi, conn_state);
 552
 553         /* nonsense combination */
 554         drm_WARN_ON(encoder->base.dev, crtc_state->limited_color_range &&
 555                     crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB);
 556
 557         if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB) {
 558                 drm_hdmi_avi_infoframe_quant_range(&frame.avi,
 559                                                    conn_state->connector,
 560                                                    adjusted_mode,
 561                                                    crtc_state->limited_color_range ?
 562                                                    HDMI_QUANTIZATION_RANGE_LIMITED :
 563                                                    HDMI_QUANTIZATION_RANGE_FULL);
 564         } else {
 565                 frame.avi.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
 566                 frame.avi.ycc_quantization_range = HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
 567         }
 568
 569         drm_hdmi_avi_infoframe_content_type(&frame.avi, conn_state);
 570
 571         ret = hdmi_infoframe_pack(&frame, buf, sizeof(buf));
 572         if (ret < 0) {
 573                 drm_err(&i915->drm, "Failed to pack AVI IF\n");
 574                 return;
 575         }
 576
 577         dig_port->write_infoframe(encoder, crtc_state, HDMI_INFOFRAME_TYPE_AVI,
 578                                   buf, ret);
 579 }
 580
 581 static bool _lspcon_read_avi_infoframe_enabled_mca(struct drm_dp_aux *aux)
 582 {
 583         int ret;
 584         u32 val = 0;
 585         u16 reg = LSPCON_MCA_AVI_IF_CTRL;
 586
 587         ret = drm_dp_dpcd_read(aux, reg, &val, 1);
 588         if (ret < 0) {
 589                 drm_err(aux->drm_dev, "DPCD read failed, address 0x%x\n", reg);
 590                 return false;
 591         }
 592
 593         return val & LSPCON_MCA_AVI_IF_KICKOFF;
 594 }
 595
 596 static bool _lspcon_read_avi_infoframe_enabled_parade(struct drm_dp_aux *aux)
 597 {
 598         int ret;
 599         u32 val = 0;
 600         u16 reg = LSPCON_PARADE_AVI_IF_CTRL;
 601
 602         ret = drm_dp_dpcd_read(aux, reg, &val, 1);
 603         if (ret < 0) {
 604                 drm_err(aux->drm_dev, "DPCD read failed, address 0x%x\n", reg);
 605                 return false;
 606         }
 607
 608         return val & LSPCON_PARADE_AVI_IF_KICKOFF;
 609 }
 610
 611 u32 lspcon_infoframes_enabled(struct intel_encoder *encoder,
 612                               const struct intel_crtc_state *pipe_config)
 613 {
 614         struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 615         struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
 616         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 617         bool infoframes_enabled;
 618         u32 val = 0;
 619         u32 mask, tmp;
 620
 621         if (lspcon->vendor == LSPCON_VENDOR_MCA)
 622                 infoframes_enabled = _lspcon_read_avi_infoframe_enabled_mca(&intel_dp->aux);
 623         else
 624                 infoframes_enabled = _lspcon_read_avi_infoframe_enabled_parade(&intel_dp->aux);
 625
 626         if (infoframes_enabled)
 627                 val |= intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_AVI);
 628
 629         if (lspcon->hdr_supported) {
 630                 tmp = intel_de_read(dev_priv,
 631                                     HSW_TVIDEO_DIP_CTL(pipe_config->cpu_transcoder));
 632                 mask = VIDEO_DIP_ENABLE_GMP_HSW;
 633
 634                 if (tmp & mask)
 635                         val |= intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA);
 636         }
 637
 638         return val;
 639 }
 640
 641 void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon)
 642 {
 643         lspcon_wait_mode(lspcon, DRM_LSPCON_MODE_PCON);
 644 }
 645
 646 bool lspcon_init(struct intel_digital_port *dig_port)
 647 {
 648         struct intel_dp *intel_dp = &dig_port->dp;
 649         struct intel_lspcon *lspcon = &dig_port->lspcon;
 650         struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 651         struct drm_connector *connector = &intel_dp->attached_connector->base;
 652
 653         lspcon->active = false;
 654         lspcon->mode = DRM_LSPCON_MODE_INVALID;
 655
 656         if (!lspcon_probe(lspcon)) {
 657                 drm_err(&i915->drm, "Failed to probe lspcon\n");
 658                 return false;
 659         }
 660
 661         if (drm_dp_read_dpcd_caps(&intel_dp->aux, intel_dp->dpcd) != 0) {
 662                 drm_err(&i915->drm, "LSPCON DPCD read failed\n");
 663                 return false;
 664         }
 665
 666         if (!lspcon_detect_vendor(lspcon)) {
 667                 drm_err(&i915->drm, "LSPCON vendor detection failed\n");
 668                 return false;
 669         }
 670
 671         connector->ycbcr_420_allowed = true;
 672         lspcon->active = true;
 673         drm_dbg_kms(&i915->drm, "Success: LSPCON init\n");
 674         return true;
 675 }
 676
 677 u32 intel_lspcon_infoframes_enabled(struct intel_encoder *encoder,
 678                                     const struct intel_crtc_state *pipe_config)
 679 {
 680         struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
 681
 682         return dig_port->infoframes_enabled(encoder, pipe_config);
 683 }
 684
 685 void lspcon_resume(struct intel_digital_port *dig_port)
 686 {
 687         struct intel_lspcon *lspcon = &dig_port->lspcon;
 688         struct drm_device *dev = dig_port->base.base.dev;
 689         struct drm_i915_private *i915 = to_i915(dev);
 690         enum drm_lspcon_mode expected_mode;
 691
 692         if (!intel_bios_encoder_is_lspcon(dig_port->base.devdata))
 693                 return;
 694
 695         if (!lspcon->active) {
 696                 if (!lspcon_init(dig_port)) {
 697                         drm_err(&i915->drm, "LSPCON init failed on port %c\n",
 698                                 port_name(dig_port->base.port));
 699                         return;
 700                 }
 701         }
 702
 703         if (lspcon_wake_native_aux_ch(lspcon)) {
 704                 expected_mode = DRM_LSPCON_MODE_PCON;
 705                 lspcon_resume_in_pcon_wa(lspcon);
 706         } else {
 707                 expected_mode = DRM_LSPCON_MODE_LS;
 708         }
 709
 710         if (lspcon_wait_mode(lspcon, expected_mode) == DRM_LSPCON_MODE_PCON)
 711                 return;
 712
 713         if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON))
 714                 drm_err(&i915->drm, "LSPCON resume failed\n");
 715         else
 716                 drm_dbg_kms(&i915->drm, "LSPCON resume success\n");
 717 }