1 /* 2 * Copyright © 2014 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 #include <linux/kernel.h> 25 #include <drm/i915_component.h> 26 #include "intel_drv.h" 27 28 #include <drm/drmP.h> 29 #include <drm/drm_edid.h> 30 #include "i915_drv.h" 31 32 /** 33 * DOC: High Definition Audio over HDMI and Display Port 34 * 35 * The graphics and audio drivers together support High Definition Audio over 36 * HDMI and Display Port. The audio programming sequences are divided into audio 37 * codec and controller enable and disable sequences. The graphics driver 38 * handles the audio codec sequences, while the audio driver handles the audio 39 * controller sequences. 40 * 41 * The disable sequences must be performed before disabling the transcoder or 42 * port. The enable sequences may only be performed after enabling the 43 * transcoder and port, and after completed link training. Therefore the audio 44 * enable/disable sequences are part of the modeset sequence. 45 * 46 * The codec and controller sequences could be done either parallel or serial, 47 * but generally the ELDV/PD change in the codec sequence indicates to the audio 48 * driver that the controller sequence should start. Indeed, most of the 49 * co-operation between the graphics and audio drivers is handled via audio 50 * related registers. (The notable exception is the power management, not 51 * covered here.) 52 * 53 * The struct i915_audio_component is used to interact between the graphics 54 * and audio drivers. The struct i915_audio_component_ops *ops in it is 55 * defined in graphics driver and called in audio driver. The 56 * struct i915_audio_component_audio_ops *audio_ops is called from i915 driver. 57 */ 58 59 static const struct { 60 int clock; 61 u32 config; 62 } hdmi_audio_clock[] = { 63 { 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 }, 64 { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */ 65 { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 }, 66 { 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 }, 67 { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 }, 68 { 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 }, 69 { 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 }, 70 { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 }, 71 { 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 }, 72 { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 }, 73 }; 74 75 /* HDMI N/CTS table */ 76 #define TMDS_297M 297000 77 #define TMDS_296M 296703 78 static const struct { 79 int sample_rate; 80 int clock; 81 int n; 82 int cts; 83 } aud_ncts[] = { 84 { 44100, TMDS_296M, 4459, 234375 }, 85 { 44100, TMDS_297M, 4704, 247500 }, 86 { 48000, TMDS_296M, 5824, 281250 }, 87 { 48000, TMDS_297M, 5120, 247500 }, 88 { 32000, TMDS_296M, 5824, 421875 }, 89 { 32000, TMDS_297M, 3072, 222750 }, 90 { 88200, TMDS_296M, 8918, 234375 }, 91 { 88200, TMDS_297M, 9408, 247500 }, 92 { 96000, TMDS_296M, 11648, 281250 }, 93 { 96000, TMDS_297M, 10240, 247500 }, 94 { 176400, TMDS_296M, 17836, 234375 }, 95 { 176400, TMDS_297M, 18816, 247500 }, 96 { 192000, TMDS_296M, 23296, 281250 }, 97 { 192000, TMDS_297M, 20480, 247500 }, 98 }; 99 100 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */ 101 static u32 audio_config_hdmi_pixel_clock(const struct drm_display_mode *adjusted_mode) 102 { 103 int i; 104 105 for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) { 106 if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock) 107 break; 108 } 109 110 if (i == ARRAY_SIZE(hdmi_audio_clock)) { 111 DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n", 112 adjusted_mode->crtc_clock); 113 i = 1; 114 } 115 116 DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n", 117 hdmi_audio_clock[i].clock, 118 hdmi_audio_clock[i].config); 119 120 return hdmi_audio_clock[i].config; 121 } 122 123 static int audio_config_get_n(const struct drm_display_mode *mode, int rate) 124 { 125 int i; 126 127 for (i = 0; i < ARRAY_SIZE(aud_ncts); i++) { 128 if ((rate == aud_ncts[i].sample_rate) && 129 (mode->clock == aud_ncts[i].clock)) { 130 return aud_ncts[i].n; 131 } 132 } 133 return 0; 134 } 135 136 static uint32_t audio_config_setup_n_reg(int n, uint32_t val) 137 { 138 int n_low, n_up; 139 uint32_t tmp = val; 140 141 n_low = n & 0xfff; 142 n_up = (n >> 12) & 0xff; 143 tmp &= ~(AUD_CONFIG_UPPER_N_MASK | AUD_CONFIG_LOWER_N_MASK); 144 tmp |= ((n_up << AUD_CONFIG_UPPER_N_SHIFT) | 145 (n_low << AUD_CONFIG_LOWER_N_SHIFT) | 146 AUD_CONFIG_N_PROG_ENABLE); 147 return tmp; 148 } 149 150 /* check whether N/CTS/M need be set manually */ 151 static bool audio_rate_need_prog(struct intel_crtc *crtc, 152 const struct drm_display_mode *mode) 153 { 154 if (((mode->clock == TMDS_297M) || 155 (mode->clock == TMDS_296M)) && 156 intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI)) 157 return true; 158 else 159 return false; 160 } 161 162 static bool intel_eld_uptodate(struct drm_connector *connector, 163 i915_reg_t reg_eldv, uint32_t bits_eldv, 164 i915_reg_t reg_elda, uint32_t bits_elda, 165 i915_reg_t reg_edid) 166 { 167 struct drm_i915_private *dev_priv = connector->dev->dev_private; 168 uint8_t *eld = connector->eld; 169 uint32_t tmp; 170 int i; 171 172 tmp = I915_READ(reg_eldv); 173 tmp &= bits_eldv; 174 175 if (!tmp) 176 return false; 177 178 tmp = I915_READ(reg_elda); 179 tmp &= ~bits_elda; 180 I915_WRITE(reg_elda, tmp); 181 182 for (i = 0; i < drm_eld_size(eld) / 4; i++) 183 if (I915_READ(reg_edid) != *((uint32_t *)eld + i)) 184 return false; 185 186 return true; 187 } 188 189 static void g4x_audio_codec_disable(struct intel_encoder *encoder) 190 { 191 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; 192 uint32_t eldv, tmp; 193 194 DRM_DEBUG_KMS("Disable audio codec\n"); 195 196 tmp = I915_READ(G4X_AUD_VID_DID); 197 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL) 198 eldv = G4X_ELDV_DEVCL_DEVBLC; 199 else 200 eldv = G4X_ELDV_DEVCTG; 201 202 /* Invalidate ELD */ 203 tmp = I915_READ(G4X_AUD_CNTL_ST); 204 tmp &= ~eldv; 205 I915_WRITE(G4X_AUD_CNTL_ST, tmp); 206 } 207 208 static void g4x_audio_codec_enable(struct drm_connector *connector, 209 struct intel_encoder *encoder, 210 const struct drm_display_mode *adjusted_mode) 211 { 212 struct drm_i915_private *dev_priv = connector->dev->dev_private; 213 uint8_t *eld = connector->eld; 214 uint32_t eldv; 215 uint32_t tmp; 216 int len, i; 217 218 DRM_DEBUG_KMS("Enable audio codec, %u bytes ELD\n", eld[2]); 219 220 tmp = I915_READ(G4X_AUD_VID_DID); 221 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL) 222 eldv = G4X_ELDV_DEVCL_DEVBLC; 223 else 224 eldv = G4X_ELDV_DEVCTG; 225 226 if (intel_eld_uptodate(connector, 227 G4X_AUD_CNTL_ST, eldv, 228 G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK, 229 G4X_HDMIW_HDMIEDID)) 230 return; 231 232 tmp = I915_READ(G4X_AUD_CNTL_ST); 233 tmp &= ~(eldv | G4X_ELD_ADDR_MASK); 234 len = (tmp >> 9) & 0x1f; /* ELD buffer size */ 235 I915_WRITE(G4X_AUD_CNTL_ST, tmp); 236 237 len = min(drm_eld_size(eld) / 4, len); 238 DRM_DEBUG_DRIVER("ELD size %d\n", len); 239 for (i = 0; i < len; i++) 240 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i)); 241 242 tmp = I915_READ(G4X_AUD_CNTL_ST); 243 tmp |= eldv; 244 I915_WRITE(G4X_AUD_CNTL_ST, tmp); 245 } 246 247 static void hsw_audio_codec_disable(struct intel_encoder *encoder) 248 { 249 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; 250 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); 251 enum i915_pipe pipe = intel_crtc->pipe; 252 uint32_t tmp; 253 254 DRM_DEBUG_KMS("Disable audio codec on pipe %c\n", pipe_name(pipe)); 255 256 mutex_lock(&dev_priv->av_mutex); 257 258 /* Disable timestamps */ 259 tmp = I915_READ(HSW_AUD_CFG(pipe)); 260 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 261 tmp |= AUD_CONFIG_N_PROG_ENABLE; 262 tmp &= ~AUD_CONFIG_UPPER_N_MASK; 263 tmp &= ~AUD_CONFIG_LOWER_N_MASK; 264 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT)) 265 tmp |= AUD_CONFIG_N_VALUE_INDEX; 266 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 267 268 /* Invalidate ELD */ 269 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); 270 tmp &= ~AUDIO_ELD_VALID(pipe); 271 tmp &= ~AUDIO_OUTPUT_ENABLE(pipe); 272 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp); 273 274 mutex_unlock(&dev_priv->av_mutex); 275 } 276 277 static void hsw_audio_codec_enable(struct drm_connector *connector, 278 struct intel_encoder *encoder, 279 const struct drm_display_mode *adjusted_mode) 280 { 281 struct drm_i915_private *dev_priv = connector->dev->dev_private; 282 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); 283 enum i915_pipe pipe = intel_crtc->pipe; 284 struct i915_audio_component *acomp = dev_priv->audio_component; 285 const uint8_t *eld = connector->eld; 286 struct intel_digital_port *intel_dig_port = 287 enc_to_dig_port(&encoder->base); 288 enum port port = intel_dig_port->port; 289 uint32_t tmp; 290 int len, i; 291 int n, rate; 292 293 DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n", 294 pipe_name(pipe), drm_eld_size(eld)); 295 296 mutex_lock(&dev_priv->av_mutex); 297 298 /* Enable audio presence detect, invalidate ELD */ 299 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); 300 tmp |= AUDIO_OUTPUT_ENABLE(pipe); 301 tmp &= ~AUDIO_ELD_VALID(pipe); 302 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp); 303 304 /* 305 * FIXME: We're supposed to wait for vblank here, but we have vblanks 306 * disabled during the mode set. The proper fix would be to push the 307 * rest of the setup into a vblank work item, queued here, but the 308 * infrastructure is not there yet. 309 */ 310 311 /* Reset ELD write address */ 312 tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(pipe)); 313 tmp &= ~IBX_ELD_ADDRESS_MASK; 314 I915_WRITE(HSW_AUD_DIP_ELD_CTRL(pipe), tmp); 315 316 /* Up to 84 bytes of hw ELD buffer */ 317 len = min(drm_eld_size(eld), 84); 318 for (i = 0; i < len / 4; i++) 319 I915_WRITE(HSW_AUD_EDID_DATA(pipe), *((const uint32_t *)eld + i)); 320 321 /* ELD valid */ 322 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); 323 tmp |= AUDIO_ELD_VALID(pipe); 324 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp); 325 326 /* Enable timestamps */ 327 tmp = I915_READ(HSW_AUD_CFG(pipe)); 328 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 329 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK; 330 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT)) 331 tmp |= AUD_CONFIG_N_VALUE_INDEX; 332 else 333 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode); 334 335 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 336 if (audio_rate_need_prog(intel_crtc, adjusted_mode)) { 337 if (!acomp) 338 rate = 0; 339 else if (port >= PORT_A && port <= PORT_E) 340 rate = acomp->aud_sample_rate[port]; 341 else { 342 DRM_ERROR("invalid port: %d\n", port); 343 rate = 0; 344 } 345 n = audio_config_get_n(adjusted_mode, rate); 346 if (n != 0) 347 tmp = audio_config_setup_n_reg(n, tmp); 348 else 349 DRM_DEBUG_KMS("no suitable N value is found\n"); 350 } 351 352 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 353 354 mutex_unlock(&dev_priv->av_mutex); 355 } 356 357 static void ilk_audio_codec_disable(struct intel_encoder *encoder) 358 { 359 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; 360 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); 361 struct intel_digital_port *intel_dig_port = 362 enc_to_dig_port(&encoder->base); 363 enum port port = intel_dig_port->port; 364 enum i915_pipe pipe = intel_crtc->pipe; 365 uint32_t tmp, eldv; 366 i915_reg_t aud_config, aud_cntrl_st2; 367 368 DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n", 369 port_name(port), pipe_name(pipe)); 370 371 if (WARN_ON(port == PORT_A)) 372 return; 373 374 if (HAS_PCH_IBX(dev_priv)) { 375 aud_config = IBX_AUD_CFG(pipe); 376 aud_cntrl_st2 = IBX_AUD_CNTL_ST2; 377 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 378 aud_config = VLV_AUD_CFG(pipe); 379 aud_cntrl_st2 = VLV_AUD_CNTL_ST2; 380 } else { 381 aud_config = CPT_AUD_CFG(pipe); 382 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2; 383 } 384 385 /* Disable timestamps */ 386 tmp = I915_READ(aud_config); 387 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 388 tmp |= AUD_CONFIG_N_PROG_ENABLE; 389 tmp &= ~AUD_CONFIG_UPPER_N_MASK; 390 tmp &= ~AUD_CONFIG_LOWER_N_MASK; 391 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT)) 392 tmp |= AUD_CONFIG_N_VALUE_INDEX; 393 I915_WRITE(aud_config, tmp); 394 395 eldv = IBX_ELD_VALID(port); 396 397 /* Invalidate ELD */ 398 tmp = I915_READ(aud_cntrl_st2); 399 tmp &= ~eldv; 400 I915_WRITE(aud_cntrl_st2, tmp); 401 } 402 403 static void ilk_audio_codec_enable(struct drm_connector *connector, 404 struct intel_encoder *encoder, 405 const struct drm_display_mode *adjusted_mode) 406 { 407 struct drm_i915_private *dev_priv = connector->dev->dev_private; 408 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); 409 struct intel_digital_port *intel_dig_port = 410 enc_to_dig_port(&encoder->base); 411 enum port port = intel_dig_port->port; 412 enum i915_pipe pipe = intel_crtc->pipe; 413 uint8_t *eld = connector->eld; 414 uint32_t eldv; 415 uint32_t tmp; 416 int len, i; 417 i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2; 418 419 DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n", 420 port_name(port), pipe_name(pipe), drm_eld_size(eld)); 421 422 if (WARN_ON(port == PORT_A)) 423 return; 424 425 /* 426 * FIXME: We're supposed to wait for vblank here, but we have vblanks 427 * disabled during the mode set. The proper fix would be to push the 428 * rest of the setup into a vblank work item, queued here, but the 429 * infrastructure is not there yet. 430 */ 431 432 if (HAS_PCH_IBX(connector->dev)) { 433 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe); 434 aud_config = IBX_AUD_CFG(pipe); 435 aud_cntl_st = IBX_AUD_CNTL_ST(pipe); 436 aud_cntrl_st2 = IBX_AUD_CNTL_ST2; 437 } else if (IS_VALLEYVIEW(connector->dev) || 438 IS_CHERRYVIEW(connector->dev)) { 439 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe); 440 aud_config = VLV_AUD_CFG(pipe); 441 aud_cntl_st = VLV_AUD_CNTL_ST(pipe); 442 aud_cntrl_st2 = VLV_AUD_CNTL_ST2; 443 } else { 444 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe); 445 aud_config = CPT_AUD_CFG(pipe); 446 aud_cntl_st = CPT_AUD_CNTL_ST(pipe); 447 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2; 448 } 449 450 eldv = IBX_ELD_VALID(port); 451 452 /* Invalidate ELD */ 453 tmp = I915_READ(aud_cntrl_st2); 454 tmp &= ~eldv; 455 I915_WRITE(aud_cntrl_st2, tmp); 456 457 /* Reset ELD write address */ 458 tmp = I915_READ(aud_cntl_st); 459 tmp &= ~IBX_ELD_ADDRESS_MASK; 460 I915_WRITE(aud_cntl_st, tmp); 461 462 /* Up to 84 bytes of hw ELD buffer */ 463 len = min(drm_eld_size(eld), 84); 464 for (i = 0; i < len / 4; i++) 465 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i)); 466 467 /* ELD valid */ 468 tmp = I915_READ(aud_cntrl_st2); 469 tmp |= eldv; 470 I915_WRITE(aud_cntrl_st2, tmp); 471 472 /* Enable timestamps */ 473 tmp = I915_READ(aud_config); 474 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 475 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 476 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK; 477 if (intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DISPLAYPORT)) 478 tmp |= AUD_CONFIG_N_VALUE_INDEX; 479 else 480 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode); 481 I915_WRITE(aud_config, tmp); 482 } 483 484 /** 485 * intel_audio_codec_enable - Enable the audio codec for HD audio 486 * @intel_encoder: encoder on which to enable audio 487 * 488 * The enable sequences may only be performed after enabling the transcoder and 489 * port, and after completed link training. 490 */ 491 void intel_audio_codec_enable(struct intel_encoder *intel_encoder) 492 { 493 struct drm_encoder *encoder = &intel_encoder->base; 494 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc); 495 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode; 496 struct drm_connector *connector; 497 struct drm_device *dev = encoder->dev; 498 struct drm_i915_private *dev_priv = dev->dev_private; 499 struct i915_audio_component *acomp = dev_priv->audio_component; 500 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); 501 enum port port = intel_dig_port->port; 502 503 connector = drm_select_eld(encoder); 504 if (!connector) 505 return; 506 507 DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n", 508 connector->base.id, 509 connector->name, 510 connector->encoder->base.id, 511 connector->encoder->name); 512 513 /* ELD Conn_Type */ 514 connector->eld[5] &= ~(3 << 2); 515 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) 516 connector->eld[5] |= (1 << 2); 517 518 connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2; 519 520 if (dev_priv->display.audio_codec_enable) 521 dev_priv->display.audio_codec_enable(connector, intel_encoder, 522 adjusted_mode); 523 524 mutex_lock(&dev_priv->av_mutex); 525 intel_dig_port->audio_connector = connector; 526 /* referred in audio callbacks */ 527 dev_priv->dig_port_map[port] = intel_encoder; 528 mutex_unlock(&dev_priv->av_mutex); 529 530 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) 531 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port); 532 } 533 534 /** 535 * intel_audio_codec_disable - Disable the audio codec for HD audio 536 * @intel_encoder: encoder on which to disable audio 537 * 538 * The disable sequences must be performed before disabling the transcoder or 539 * port. 540 */ 541 void intel_audio_codec_disable(struct intel_encoder *intel_encoder) 542 { 543 struct drm_encoder *encoder = &intel_encoder->base; 544 struct drm_device *dev = encoder->dev; 545 struct drm_i915_private *dev_priv = dev->dev_private; 546 struct i915_audio_component *acomp = dev_priv->audio_component; 547 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); 548 enum port port = intel_dig_port->port; 549 550 if (dev_priv->display.audio_codec_disable) 551 dev_priv->display.audio_codec_disable(intel_encoder); 552 553 mutex_lock(&dev_priv->av_mutex); 554 intel_dig_port->audio_connector = NULL; 555 dev_priv->dig_port_map[port] = NULL; 556 mutex_unlock(&dev_priv->av_mutex); 557 558 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) 559 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, (int) port); 560 } 561 562 /** 563 * intel_init_audio_hooks - Set up chip specific audio hooks 564 * @dev_priv: device private 565 */ 566 void intel_init_audio_hooks(struct drm_i915_private *dev_priv) 567 { 568 if (IS_G4X(dev_priv)) { 569 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable; 570 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable; 571 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 572 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable; 573 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable; 574 } else if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8) { 575 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable; 576 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable; 577 } else if (HAS_PCH_SPLIT(dev_priv)) { 578 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable; 579 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable; 580 } 581 } 582 583 #if 0 /* unused */ 584 static void i915_audio_component_get_power(struct device *dev) 585 { 586 intel_display_power_get(dev_to_i915(dev), POWER_DOMAIN_AUDIO); 587 } 588 589 static void i915_audio_component_put_power(struct device *dev) 590 { 591 intel_display_power_put(dev_to_i915(dev), POWER_DOMAIN_AUDIO); 592 } 593 594 static void i915_audio_component_codec_wake_override(struct device *dev, 595 bool enable) 596 { 597 struct drm_i915_private *dev_priv = dev_to_i915(dev); 598 u32 tmp; 599 600 if (!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv)) 601 return; 602 603 i915_audio_component_get_power(dev); 604 605 /* 606 * Enable/disable generating the codec wake signal, overriding the 607 * internal logic to generate the codec wake to controller. 608 */ 609 tmp = I915_READ(HSW_AUD_CHICKENBIT); 610 tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL; 611 I915_WRITE(HSW_AUD_CHICKENBIT, tmp); 612 usleep_range(1000, 1500); 613 614 if (enable) { 615 tmp = I915_READ(HSW_AUD_CHICKENBIT); 616 tmp |= SKL_AUD_CODEC_WAKE_SIGNAL; 617 I915_WRITE(HSW_AUD_CHICKENBIT, tmp); 618 usleep_range(1000, 1500); 619 } 620 621 i915_audio_component_put_power(dev); 622 } 623 624 /* Get CDCLK in kHz */ 625 static int i915_audio_component_get_cdclk_freq(struct device *dev) 626 { 627 struct drm_i915_private *dev_priv = dev_to_i915(dev); 628 629 if (WARN_ON_ONCE(!HAS_DDI(dev_priv))) 630 return -ENODEV; 631 632 return dev_priv->cdclk_freq; 633 } 634 635 static int i915_audio_component_sync_audio_rate(struct device *dev, 636 int port, int rate) 637 { 638 struct drm_i915_private *dev_priv = dev_to_i915(dev); 639 struct intel_encoder *intel_encoder; 640 struct intel_crtc *crtc; 641 struct drm_display_mode *mode; 642 struct i915_audio_component *acomp = dev_priv->audio_component; 643 enum i915_pipe pipe = INVALID_PIPE; 644 u32 tmp; 645 int n; 646 int err = 0; 647 648 /* HSW, BDW, SKL, KBL need this fix */ 649 if (!IS_SKYLAKE(dev_priv) && 650 !IS_KABYLAKE(dev_priv) && 651 !IS_BROADWELL(dev_priv) && 652 !IS_HASWELL(dev_priv)) 653 return 0; 654 655 i915_audio_component_get_power(dev); 656 mutex_lock(&dev_priv->av_mutex); 657 /* 1. get the pipe */ 658 intel_encoder = dev_priv->dig_port_map[port]; 659 /* intel_encoder might be NULL for DP MST */ 660 if (!intel_encoder || !intel_encoder->base.crtc || 661 intel_encoder->type != INTEL_OUTPUT_HDMI) { 662 DRM_DEBUG_KMS("no valid port %c\n", port_name(port)); 663 err = -ENODEV; 664 goto unlock; 665 } 666 crtc = to_intel_crtc(intel_encoder->base.crtc); 667 pipe = crtc->pipe; 668 if (pipe == INVALID_PIPE) { 669 DRM_DEBUG_KMS("no pipe for the port %c\n", port_name(port)); 670 err = -ENODEV; 671 goto unlock; 672 } 673 674 DRM_DEBUG_KMS("pipe %c connects port %c\n", 675 pipe_name(pipe), port_name(port)); 676 mode = &crtc->config->base.adjusted_mode; 677 678 /* port must be valid now, otherwise the pipe will be invalid */ 679 acomp->aud_sample_rate[port] = rate; 680 681 /* 2. check whether to set the N/CTS/M manually or not */ 682 if (!audio_rate_need_prog(crtc, mode)) { 683 tmp = I915_READ(HSW_AUD_CFG(pipe)); 684 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 685 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 686 goto unlock; 687 } 688 689 n = audio_config_get_n(mode, rate); 690 if (n == 0) { 691 DRM_DEBUG_KMS("Using automatic mode for N value on port %c\n", 692 port_name(port)); 693 tmp = I915_READ(HSW_AUD_CFG(pipe)); 694 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 695 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 696 goto unlock; 697 } 698 699 /* 3. set the N/CTS/M */ 700 tmp = I915_READ(HSW_AUD_CFG(pipe)); 701 tmp = audio_config_setup_n_reg(n, tmp); 702 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 703 704 unlock: 705 mutex_unlock(&dev_priv->av_mutex); 706 i915_audio_component_put_power(dev); 707 return err; 708 } 709 710 static int i915_audio_component_get_eld(struct device *dev, int port, 711 bool *enabled, 712 unsigned char *buf, int max_bytes) 713 { 714 struct drm_i915_private *dev_priv = dev_to_i915(dev); 715 struct intel_encoder *intel_encoder; 716 struct intel_digital_port *intel_dig_port; 717 const u8 *eld; 718 int ret = -EINVAL; 719 720 mutex_lock(&dev_priv->av_mutex); 721 intel_encoder = dev_priv->dig_port_map[port]; 722 /* intel_encoder might be NULL for DP MST */ 723 if (intel_encoder) { 724 ret = 0; 725 intel_dig_port = enc_to_dig_port(&intel_encoder->base); 726 *enabled = intel_dig_port->audio_connector != NULL; 727 if (*enabled) { 728 eld = intel_dig_port->audio_connector->eld; 729 ret = drm_eld_size(eld); 730 memcpy(buf, eld, min(max_bytes, ret)); 731 } 732 } 733 734 mutex_unlock(&dev_priv->av_mutex); 735 return ret; 736 } 737 #endif 738 739 #if 0 /* unused */ 740 static const struct i915_audio_component_ops i915_audio_component_ops = { 741 .owner = THIS_MODULE, 742 .get_power = i915_audio_component_get_power, 743 .put_power = i915_audio_component_put_power, 744 .codec_wake_override = i915_audio_component_codec_wake_override, 745 .get_cdclk_freq = i915_audio_component_get_cdclk_freq, 746 .sync_audio_rate = i915_audio_component_sync_audio_rate, 747 .get_eld = i915_audio_component_get_eld, 748 }; 749 750 static int i915_audio_component_bind(struct device *i915_dev, 751 struct device *hda_dev, void *data) 752 { 753 struct i915_audio_component *acomp = data; 754 struct drm_i915_private *dev_priv = dev_to_i915(i915_dev); 755 int i; 756 757 if (WARN_ON(acomp->ops || acomp->dev)) 758 return -EEXIST; 759 760 drm_modeset_lock_all(dev_priv->dev); 761 acomp->ops = &i915_audio_component_ops; 762 acomp->dev = i915_dev; 763 BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS); 764 for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++) 765 acomp->aud_sample_rate[i] = 0; 766 dev_priv->audio_component = acomp; 767 drm_modeset_unlock_all(dev_priv->dev); 768 769 return 0; 770 } 771 772 static void i915_audio_component_unbind(struct device *i915_dev, 773 struct device *hda_dev, void *data) 774 { 775 struct i915_audio_component *acomp = data; 776 struct drm_i915_private *dev_priv = dev_to_i915(i915_dev); 777 778 drm_modeset_lock_all(dev_priv->dev); 779 acomp->ops = NULL; 780 acomp->dev = NULL; 781 dev_priv->audio_component = NULL; 782 drm_modeset_unlock_all(dev_priv->dev); 783 } 784 785 static const struct component_ops i915_audio_component_bind_ops = { 786 .bind = i915_audio_component_bind, 787 .unbind = i915_audio_component_unbind, 788 }; 789 #endif 790 791 /** 792 * i915_audio_component_init - initialize and register the audio component 793 * @dev_priv: i915 device instance 794 * 795 * This will register with the component framework a child component which 796 * will bind dynamically to the snd_hda_intel driver's corresponding master 797 * component when the latter is registered. During binding the child 798 * initializes an instance of struct i915_audio_component which it receives 799 * from the master. The master can then start to use the interface defined by 800 * this struct. Each side can break the binding at any point by deregistering 801 * its own component after which each side's component unbind callback is 802 * called. 803 * 804 * We ignore any error during registration and continue with reduced 805 * functionality (i.e. without HDMI audio). 806 */ 807 void i915_audio_component_init(struct drm_i915_private *dev_priv) 808 { 809 #if 0 810 int ret; 811 812 ret = component_add(dev_priv->dev->dev, &i915_audio_component_bind_ops); 813 if (ret < 0) { 814 DRM_ERROR("failed to add audio component (%d)\n", ret); 815 /* continue with reduced functionality */ 816 return; 817 } 818 #endif 819 820 dev_priv->audio_component_registered = true; 821 } 822 823 /** 824 * i915_audio_component_cleanup - deregister the audio component 825 * @dev_priv: i915 device instance 826 * 827 * Deregisters the audio component, breaking any existing binding to the 828 * corresponding snd_hda_intel driver's master component. 829 */ 830 void i915_audio_component_cleanup(struct drm_i915_private *dev_priv) 831 { 832 if (!dev_priv->audio_component_registered) 833 return; 834 835 #if 0 836 component_del(dev_priv->dev->dev, &i915_audio_component_bind_ops); 837 #endif 838 dev_priv->audio_component_registered = false; 839 } 840