drivers/gpu/drm/radeon/evergreen_hdmi.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Christian König.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: Christian König
  25  *          Rafał Miłecki
  26  */
  27 #include <linux/hdmi.h>
  28 #include <drm/drmP.h>
  29 #include <drm/radeon_drm.h>
  30 #include "radeon.h"
  31 #include "radeon_asic.h"
  32 #include "evergreend.h"
  33 #include "atom.h"
  34
  35 extern void dce6_afmt_write_speaker_allocation(struct drm_encoder *encoder);
  36 extern void dce6_afmt_write_sad_regs(struct drm_encoder *encoder);
  37 extern void dce6_afmt_select_pin(struct drm_encoder *encoder);
  38
  39 /*
  40  * update the N and CTS parameters for a given pixel clock rate
  41  */
  42 static void evergreen_hdmi_update_ACR(struct drm_encoder *encoder, uint32_t clock)
  43 {
  44         struct drm_device *dev = encoder->dev;
  45         struct radeon_device *rdev = dev->dev_private;
  46         struct radeon_hdmi_acr acr = r600_hdmi_acr(clock);
  47         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
  48         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
  49         uint32_t offset = dig->afmt->offset;
  50
  51         WREG32(HDMI_ACR_32_0 + offset, HDMI_ACR_CTS_32(acr.cts_32khz));
  52         WREG32(HDMI_ACR_32_1 + offset, acr.n_32khz);
  53
  54         WREG32(HDMI_ACR_44_0 + offset, HDMI_ACR_CTS_44(acr.cts_44_1khz));
  55         WREG32(HDMI_ACR_44_1 + offset, acr.n_44_1khz);
  56
  57         WREG32(HDMI_ACR_48_0 + offset, HDMI_ACR_CTS_48(acr.cts_48khz));
  58         WREG32(HDMI_ACR_48_1 + offset, acr.n_48khz);
  59 }
  60
  61 static void dce4_afmt_write_speaker_allocation(struct drm_encoder *encoder)
  62 {
  63         struct radeon_device *rdev = encoder->dev->dev_private;
  64         struct drm_connector *connector;
  65         struct radeon_connector *radeon_connector = NULL;
  66         u32 tmp;
  67         u8 *sadb;
  68         int sad_count;
  69
  70         /* XXX: setting this register causes hangs on some asics */
  71         return;
  72
  73         list_for_each_entry(connector, &encoder->dev->mode_config.connector_list, head) {
  74                 if (connector->encoder == encoder)
  75                         radeon_connector = to_radeon_connector(connector);
  76         }
  77
  78         if (!radeon_connector) {
  79                 DRM_ERROR("Couldn't find encoder's connector\n");
  80                 return;
  81         }
  82
  83         sad_count = drm_edid_to_speaker_allocation(radeon_connector->edid, &sadb);
  84         if (sad_count <= 0) {
  85                 DRM_ERROR("Couldn't read Speaker Allocation Data Block: %d\n", sad_count);
  86                 return;
  87         }
  88
  89         /* program the speaker allocation */
  90         tmp = RREG32(AZ_F0_CODEC_PIN0_CONTROL_CHANNEL_SPEAKER);
  91         tmp &= ~(DP_CONNECTION | SPEAKER_ALLOCATION_MASK);
  92         /* set HDMI mode */
  93         tmp |= HDMI_CONNECTION;
  94         if (sad_count)
  95                 tmp |= SPEAKER_ALLOCATION(sadb[0]);
  96         else
  97                 tmp |= SPEAKER_ALLOCATION(5); /* stereo */
  98         WREG32(AZ_F0_CODEC_PIN0_CONTROL_CHANNEL_SPEAKER, tmp);
  99
 100         kfree(sadb);
 101 }
 102
 103 static void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder)
 104 {
 105         struct radeon_device *rdev = encoder->dev->dev_private;
 106         struct drm_connector *connector;
 107         struct radeon_connector *radeon_connector = NULL;
 108         struct cea_sad *sads;
 109         int i, sad_count;
 110
 111         static const u16 eld_reg_to_type[][2] = {
 112                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR0, HDMI_AUDIO_CODING_TYPE_PCM },
 113                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR1, HDMI_AUDIO_CODING_TYPE_AC3 },
 114                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR2, HDMI_AUDIO_CODING_TYPE_MPEG1 },
 115                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR3, HDMI_AUDIO_CODING_TYPE_MP3 },
 116                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR4, HDMI_AUDIO_CODING_TYPE_MPEG2 },
 117                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR5, HDMI_AUDIO_CODING_TYPE_AAC_LC },
 118                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR6, HDMI_AUDIO_CODING_TYPE_DTS },
 119                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR7, HDMI_AUDIO_CODING_TYPE_ATRAC },
 120                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR9, HDMI_AUDIO_CODING_TYPE_EAC3 },
 121                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR10, HDMI_AUDIO_CODING_TYPE_DTS_HD },
 122                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR11, HDMI_AUDIO_CODING_TYPE_MLP },
 123                 { AZ_F0_CODEC_PIN0_CONTROL_AUDIO_DESCRIPTOR13, HDMI_AUDIO_CODING_TYPE_WMA_PRO },
 124         };
 125
 126         list_for_each_entry(connector, &encoder->dev->mode_config.connector_list, head) {
 127                 if (connector->encoder == encoder)
 128                         radeon_connector = to_radeon_connector(connector);
 129         }
 130
 131         if (!radeon_connector) {
 132                 DRM_ERROR("Couldn't find encoder's connector\n");
 133                 return;
 134         }
 135
 136         sad_count = drm_edid_to_sad(radeon_connector->edid, &sads);
 137         if (sad_count <= 0) {
 138                 DRM_ERROR("Couldn't read SADs: %d\n", sad_count);
 139                 return;
 140         }
 141         BUG_ON(!sads);
 142
 143         for (i = 0; i < ARRAY_SIZE(eld_reg_to_type); i++) {
 144                 u32 value = 0;
 145                 int j;
 146
 147                 for (j = 0; j < sad_count; j++) {
 148                         struct cea_sad *sad = &sads[j];
 149
 150                         if (sad->format == eld_reg_to_type[i][1]) {
 151                                 value = MAX_CHANNELS(sad->channels) |
 152                                         DESCRIPTOR_BYTE_2(sad->byte2) |
 153                                         SUPPORTED_FREQUENCIES(sad->freq);
 154                                 if (sad->format == HDMI_AUDIO_CODING_TYPE_PCM)
 155                                         value |= SUPPORTED_FREQUENCIES_STEREO(sad->freq);
 156                                 break;
 157                         }
 158                 }
 159                 WREG32(eld_reg_to_type[i][0], value);
 160         }
 161
 162         kfree(sads);
 163 }
 164
 165 /*
 166  * build a HDMI Video Info Frame
 167  */
 168 static void evergreen_hdmi_update_avi_infoframe(struct drm_encoder *encoder,
 169                                                 void *buffer, size_t size)
 170 {
 171         struct drm_device *dev = encoder->dev;
 172         struct radeon_device *rdev = dev->dev_private;
 173         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 174         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 175         uint32_t offset = dig->afmt->offset;
 176         uint8_t *frame = buffer + 3;
 177         uint8_t *header = buffer;
 178
 179         WREG32(AFMT_AVI_INFO0 + offset,
 180                 frame[0x0] | (frame[0x1] << 8) | (frame[0x2] << 16) | (frame[0x3] << 24));
 181         WREG32(AFMT_AVI_INFO1 + offset,
 182                 frame[0x4] | (frame[0x5] << 8) | (frame[0x6] << 16) | (frame[0x7] << 24));
 183         WREG32(AFMT_AVI_INFO2 + offset,
 184                 frame[0x8] | (frame[0x9] << 8) | (frame[0xA] << 16) | (frame[0xB] << 24));
 185         WREG32(AFMT_AVI_INFO3 + offset,
 186                 frame[0xC] | (frame[0xD] << 8) | (header[1] << 24));
 187 }
 188
 189 static void evergreen_audio_set_dto(struct drm_encoder *encoder, u32 clock)
 190 {
 191         struct drm_device *dev = encoder->dev;
 192         struct radeon_device *rdev = dev->dev_private;
 193         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 194         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 195         struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
 196         u32 base_rate = 24000;
 197         u32 max_ratio = clock / base_rate;
 198         u32 dto_phase;
 199         u32 dto_modulo = clock;
 200         u32 wallclock_ratio;
 201         u32 dto_cntl;
 202
 203         if (!dig || !dig->afmt)
 204                 return;
 205
 206         if (ASIC_IS_DCE6(rdev)) {
 207                 dto_phase = 24 * 1000;
 208         } else {
 209                 if (max_ratio >= 8) {
 210                         dto_phase = 192 * 1000;
 211                         wallclock_ratio = 3;
 212                 } else if (max_ratio >= 4) {
 213                         dto_phase = 96 * 1000;
 214                         wallclock_ratio = 2;
 215                 } else if (max_ratio >= 2) {
 216                         dto_phase = 48 * 1000;
 217                         wallclock_ratio = 1;
 218                 } else {
 219                         dto_phase = 24 * 1000;
 220                         wallclock_ratio = 0;
 221                 }
 222                 dto_cntl = RREG32(DCCG_AUDIO_DTO0_CNTL) & ~DCCG_AUDIO_DTO_WALLCLOCK_RATIO_MASK;
 223                 dto_cntl |= DCCG_AUDIO_DTO_WALLCLOCK_RATIO(wallclock_ratio);
 224                 WREG32(DCCG_AUDIO_DTO0_CNTL, dto_cntl);
 225         }
 226
 227         /* XXX two dtos; generally use dto0 for hdmi */
 228         /* Express [24MHz / target pixel clock] as an exact rational
 229          * number (coefficient of two integer numbers.  DCCG_AUDIO_DTOx_PHASE
 230          * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
 231          */
 232         WREG32(DCCG_AUDIO_DTO_SOURCE, DCCG_AUDIO_DTO0_SOURCE_SEL(radeon_crtc->crtc_id));
 233         WREG32(DCCG_AUDIO_DTO0_PHASE, dto_phase);
 234         WREG32(DCCG_AUDIO_DTO0_MODULE, dto_modulo);
 235 }
 236
 237
 238 /*
 239  * update the info frames with the data from the current display mode
 240  */
 241 void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mode)
 242 {
 243         struct drm_device *dev = encoder->dev;
 244         struct radeon_device *rdev = dev->dev_private;
 245         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 246         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 247         u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
 248         struct hdmi_avi_infoframe frame;
 249         uint32_t offset;
 250         ssize_t err;
 251
 252         if (!dig || !dig->afmt)
 253                 return;
 254
 255         /* Silent, r600_hdmi_enable will raise WARN for us */
 256         if (!dig->afmt->enabled)
 257                 return;
 258         offset = dig->afmt->offset;
 259
 260         /* disable audio prior to setting up hw */
 261         if (ASIC_IS_DCE6(rdev)) {
 262                 dig->afmt->pin = dce6_audio_get_pin(rdev);
 263                 dce6_audio_enable(rdev, dig->afmt->pin, false);
 264         } else {
 265                 dig->afmt->pin = r600_audio_get_pin(rdev);
 266                 r600_audio_enable(rdev, dig->afmt->pin, false);
 267         }
 268
 269         evergreen_audio_set_dto(encoder, mode->clock);
 270
 271         WREG32(HDMI_VBI_PACKET_CONTROL + offset,
 272                HDMI_NULL_SEND); /* send null packets when required */
 273
 274         WREG32(AFMT_AUDIO_CRC_CONTROL + offset, 0x1000);
 275
 276         WREG32(HDMI_VBI_PACKET_CONTROL + offset,
 277                HDMI_NULL_SEND | /* send null packets when required */
 278                HDMI_GC_SEND | /* send general control packets */
 279                HDMI_GC_CONT); /* send general control packets every frame */
 280
 281         WREG32(HDMI_INFOFRAME_CONTROL0 + offset,
 282                HDMI_AUDIO_INFO_SEND | /* enable audio info frames (frames won't be set until audio is enabled) */
 283                HDMI_AUDIO_INFO_CONT); /* required for audio info values to be updated */
 284
 285         WREG32(AFMT_INFOFRAME_CONTROL0 + offset,
 286                AFMT_AUDIO_INFO_UPDATE); /* required for audio info values to be updated */
 287
 288         WREG32(HDMI_INFOFRAME_CONTROL1 + offset,
 289                HDMI_AUDIO_INFO_LINE(2)); /* anything other than 0 */
 290
 291         WREG32(HDMI_GC + offset, 0); /* unset HDMI_GC_AVMUTE */
 292
 293         WREG32(HDMI_AUDIO_PACKET_CONTROL + offset,
 294                HDMI_AUDIO_DELAY_EN(1) | /* set the default audio delay */
 295                HDMI_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */
 296
 297         WREG32(AFMT_AUDIO_PACKET_CONTROL + offset,
 298                AFMT_60958_CS_UPDATE); /* allow 60958 channel status fields to be updated */
 299
 300         /* fglrx clears sth in AFMT_AUDIO_PACKET_CONTROL2 here */
 301
 302         WREG32(HDMI_ACR_PACKET_CONTROL + offset,
 303                HDMI_ACR_SOURCE | /* select SW CTS value */
 304                HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets when required */
 305
 306         evergreen_hdmi_update_ACR(encoder, mode->clock);
 307
 308         WREG32(AFMT_60958_0 + offset,
 309                AFMT_60958_CS_CHANNEL_NUMBER_L(1));
 310
 311         WREG32(AFMT_60958_1 + offset,
 312                AFMT_60958_CS_CHANNEL_NUMBER_R(2));
 313
 314         WREG32(AFMT_60958_2 + offset,
 315                AFMT_60958_CS_CHANNEL_NUMBER_2(3) |
 316                AFMT_60958_CS_CHANNEL_NUMBER_3(4) |
 317                AFMT_60958_CS_CHANNEL_NUMBER_4(5) |
 318                AFMT_60958_CS_CHANNEL_NUMBER_5(6) |
 319                AFMT_60958_CS_CHANNEL_NUMBER_6(7) |
 320                AFMT_60958_CS_CHANNEL_NUMBER_7(8));
 321
 322         if (ASIC_IS_DCE6(rdev)) {
 323                 dce6_afmt_write_speaker_allocation(encoder);
 324         } else {
 325                 dce4_afmt_write_speaker_allocation(encoder);
 326         }
 327
 328         WREG32(AFMT_AUDIO_PACKET_CONTROL2 + offset,
 329                AFMT_AUDIO_CHANNEL_ENABLE(0xff));
 330
 331         /* fglrx sets 0x40 in 0x5f80 here */
 332
 333         if (ASIC_IS_DCE6(rdev)) {
 334                 dce6_afmt_select_pin(encoder);
 335                 dce6_afmt_write_sad_regs(encoder);
 336         } else {
 337                 evergreen_hdmi_write_sad_regs(encoder);
 338         }
 339
 340         err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
 341         if (err < 0) {
 342                 DRM_ERROR("failed to setup AVI infoframe: %zd\n", err);
 343                 return;
 344         }
 345
 346         err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
 347         if (err < 0) {
 348                 DRM_ERROR("failed to pack AVI infoframe: %zd\n", err);
 349                 return;
 350         }
 351
 352         evergreen_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));
 353
 354         WREG32_OR(HDMI_INFOFRAME_CONTROL0 + offset,
 355                   HDMI_AVI_INFO_SEND | /* enable AVI info frames */
 356                   HDMI_AVI_INFO_CONT); /* required for audio info values to be updated */
 357
 358         WREG32_P(HDMI_INFOFRAME_CONTROL1 + offset,
 359                  HDMI_AVI_INFO_LINE(2), /* anything other than 0 */
 360                  ~HDMI_AVI_INFO_LINE_MASK);
 361
 362         WREG32_OR(AFMT_AUDIO_PACKET_CONTROL + offset,
 363                   AFMT_AUDIO_SAMPLE_SEND); /* send audio packets */
 364
 365         /* it's unknown what these bits do excatly, but it's indeed quite useful for debugging */
 366         WREG32(AFMT_RAMP_CONTROL0 + offset, 0x00FFFFFF);
 367         WREG32(AFMT_RAMP_CONTROL1 + offset, 0x007FFFFF);
 368         WREG32(AFMT_RAMP_CONTROL2 + offset, 0x00000001);
 369         WREG32(AFMT_RAMP_CONTROL3 + offset, 0x00000001);
 370
 371         /* enable audio after to setting up hw */
 372         if (ASIC_IS_DCE6(rdev))
 373                 dce6_audio_enable(rdev, dig->afmt->pin, true);
 374         else
 375                 r600_audio_enable(rdev, dig->afmt->pin, true);
 376 }
 377
 378 void evergreen_hdmi_enable(struct drm_encoder *encoder, bool enable)
 379 {
 380         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 381         struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 382
 383         if (!dig || !dig->afmt)
 384                 return;
 385
 386         /* Silent, r600_hdmi_enable will raise WARN for us */
 387         if (enable && dig->afmt->enabled)
 388                 return;
 389         if (!enable && !dig->afmt->enabled)
 390                 return;
 391
 392         dig->afmt->enabled = enable;
 393
 394         DRM_DEBUG("%sabling HDMI interface @ 0x%04X for encoder 0x%x\n",
 395                   enable ? "En" : "Dis", dig->afmt->offset, radeon_encoder->encoder_id);
 396 }