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 <linux/component.h> 26 #include <drm/i915_component.h> 27 #include <drm/intel_lpe_audio.h> 28 #include "intel_drv.h" 29 30 #include <drm/drmP.h> 31 #include <drm/drm_edid.h> 32 #include "i915_drv.h" 33 34 /** 35 * DOC: High Definition Audio over HDMI and Display Port 36 * 37 * The graphics and audio drivers together support High Definition Audio over 38 * HDMI and Display Port. The audio programming sequences are divided into audio 39 * codec and controller enable and disable sequences. The graphics driver 40 * handles the audio codec sequences, while the audio driver handles the audio 41 * controller sequences. 42 * 43 * The disable sequences must be performed before disabling the transcoder or 44 * port. The enable sequences may only be performed after enabling the 45 * transcoder and port, and after completed link training. Therefore the audio 46 * enable/disable sequences are part of the modeset sequence. 47 * 48 * The codec and controller sequences could be done either parallel or serial, 49 * but generally the ELDV/PD change in the codec sequence indicates to the audio 50 * driver that the controller sequence should start. Indeed, most of the 51 * co-operation between the graphics and audio drivers is handled via audio 52 * related registers. (The notable exception is the power management, not 53 * covered here.) 54 * 55 * The struct &i915_audio_component is used to interact between the graphics 56 * and audio drivers. The struct &i915_audio_component_ops @ops in it is 57 * defined in graphics driver and called in audio driver. The 58 * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver. 59 */ 60 61 /* DP N/M table */ 62 #define LC_540M 540000 63 #define LC_270M 270000 64 #define LC_162M 162000 65 66 struct dp_aud_n_m { 67 int sample_rate; 68 int clock; 69 u16 m; 70 u16 n; 71 }; 72 73 /* Values according to DP 1.4 Table 2-104 */ 74 static const struct dp_aud_n_m dp_aud_n_m[] = { 75 { 32000, LC_162M, 1024, 10125 }, 76 { 44100, LC_162M, 784, 5625 }, 77 { 48000, LC_162M, 512, 3375 }, 78 { 64000, LC_162M, 2048, 10125 }, 79 { 88200, LC_162M, 1568, 5625 }, 80 { 96000, LC_162M, 1024, 3375 }, 81 { 128000, LC_162M, 4096, 10125 }, 82 { 176400, LC_162M, 3136, 5625 }, 83 { 192000, LC_162M, 2048, 3375 }, 84 { 32000, LC_270M, 1024, 16875 }, 85 { 44100, LC_270M, 784, 9375 }, 86 { 48000, LC_270M, 512, 5625 }, 87 { 64000, LC_270M, 2048, 16875 }, 88 { 88200, LC_270M, 1568, 9375 }, 89 { 96000, LC_270M, 1024, 5625 }, 90 { 128000, LC_270M, 4096, 16875 }, 91 { 176400, LC_270M, 3136, 9375 }, 92 { 192000, LC_270M, 2048, 5625 }, 93 { 32000, LC_540M, 1024, 33750 }, 94 { 44100, LC_540M, 784, 18750 }, 95 { 48000, LC_540M, 512, 11250 }, 96 { 64000, LC_540M, 2048, 33750 }, 97 { 88200, LC_540M, 1568, 18750 }, 98 { 96000, LC_540M, 1024, 11250 }, 99 { 128000, LC_540M, 4096, 33750 }, 100 { 176400, LC_540M, 3136, 18750 }, 101 { 192000, LC_540M, 2048, 11250 }, 102 }; 103 104 static const struct dp_aud_n_m * 105 audio_config_dp_get_n_m(struct intel_crtc *intel_crtc, int rate) 106 { 107 int i; 108 109 for (i = 0; i < ARRAY_SIZE(dp_aud_n_m); i++) { 110 if (rate == dp_aud_n_m[i].sample_rate && 111 intel_crtc->config->port_clock == dp_aud_n_m[i].clock) 112 return &dp_aud_n_m[i]; 113 } 114 115 return NULL; 116 } 117 118 static const struct { 119 int clock; 120 u32 config; 121 } hdmi_audio_clock[] = { 122 { 25175, AUD_CONFIG_PIXEL_CLOCK_HDMI_25175 }, 123 { 25200, AUD_CONFIG_PIXEL_CLOCK_HDMI_25200 }, /* default per bspec */ 124 { 27000, AUD_CONFIG_PIXEL_CLOCK_HDMI_27000 }, 125 { 27027, AUD_CONFIG_PIXEL_CLOCK_HDMI_27027 }, 126 { 54000, AUD_CONFIG_PIXEL_CLOCK_HDMI_54000 }, 127 { 54054, AUD_CONFIG_PIXEL_CLOCK_HDMI_54054 }, 128 { 74176, AUD_CONFIG_PIXEL_CLOCK_HDMI_74176 }, 129 { 74250, AUD_CONFIG_PIXEL_CLOCK_HDMI_74250 }, 130 { 148352, AUD_CONFIG_PIXEL_CLOCK_HDMI_148352 }, 131 { 148500, AUD_CONFIG_PIXEL_CLOCK_HDMI_148500 }, 132 }; 133 134 /* HDMI N/CTS table */ 135 #define TMDS_297M 297000 136 #define TMDS_296M 296703 137 static const struct { 138 int sample_rate; 139 int clock; 140 int n; 141 int cts; 142 } hdmi_aud_ncts[] = { 143 { 44100, TMDS_296M, 4459, 234375 }, 144 { 44100, TMDS_297M, 4704, 247500 }, 145 { 48000, TMDS_296M, 5824, 281250 }, 146 { 48000, TMDS_297M, 5120, 247500 }, 147 { 32000, TMDS_296M, 5824, 421875 }, 148 { 32000, TMDS_297M, 3072, 222750 }, 149 { 88200, TMDS_296M, 8918, 234375 }, 150 { 88200, TMDS_297M, 9408, 247500 }, 151 { 96000, TMDS_296M, 11648, 281250 }, 152 { 96000, TMDS_297M, 10240, 247500 }, 153 { 176400, TMDS_296M, 17836, 234375 }, 154 { 176400, TMDS_297M, 18816, 247500 }, 155 { 192000, TMDS_296M, 23296, 281250 }, 156 { 192000, TMDS_297M, 20480, 247500 }, 157 }; 158 159 /* get AUD_CONFIG_PIXEL_CLOCK_HDMI_* value for mode */ 160 static u32 audio_config_hdmi_pixel_clock(const struct drm_display_mode *adjusted_mode) 161 { 162 int i; 163 164 for (i = 0; i < ARRAY_SIZE(hdmi_audio_clock); i++) { 165 if (adjusted_mode->crtc_clock == hdmi_audio_clock[i].clock) 166 break; 167 } 168 169 if (i == ARRAY_SIZE(hdmi_audio_clock)) { 170 DRM_DEBUG_KMS("HDMI audio pixel clock setting for %d not found, falling back to defaults\n", 171 adjusted_mode->crtc_clock); 172 i = 1; 173 } 174 175 DRM_DEBUG_KMS("Configuring HDMI audio for pixel clock %d (0x%08x)\n", 176 hdmi_audio_clock[i].clock, 177 hdmi_audio_clock[i].config); 178 179 return hdmi_audio_clock[i].config; 180 } 181 182 static int audio_config_hdmi_get_n(const struct drm_display_mode *adjusted_mode, 183 int rate) 184 { 185 int i; 186 187 for (i = 0; i < ARRAY_SIZE(hdmi_aud_ncts); i++) { 188 if (rate == hdmi_aud_ncts[i].sample_rate && 189 adjusted_mode->crtc_clock == hdmi_aud_ncts[i].clock) { 190 return hdmi_aud_ncts[i].n; 191 } 192 } 193 return 0; 194 } 195 196 static bool intel_eld_uptodate(struct drm_connector *connector, 197 i915_reg_t reg_eldv, uint32_t bits_eldv, 198 i915_reg_t reg_elda, uint32_t bits_elda, 199 i915_reg_t reg_edid) 200 { 201 struct drm_i915_private *dev_priv = to_i915(connector->dev); 202 uint8_t *eld = connector->eld; 203 uint32_t tmp; 204 int i; 205 206 tmp = I915_READ(reg_eldv); 207 tmp &= bits_eldv; 208 209 if (!tmp) 210 return false; 211 212 tmp = I915_READ(reg_elda); 213 tmp &= ~bits_elda; 214 I915_WRITE(reg_elda, tmp); 215 216 for (i = 0; i < drm_eld_size(eld) / 4; i++) 217 if (I915_READ(reg_edid) != *((uint32_t *)eld + i)) 218 return false; 219 220 return true; 221 } 222 223 static void g4x_audio_codec_disable(struct intel_encoder *encoder) 224 { 225 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 226 uint32_t eldv, tmp; 227 228 DRM_DEBUG_KMS("Disable audio codec\n"); 229 230 tmp = I915_READ(G4X_AUD_VID_DID); 231 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL) 232 eldv = G4X_ELDV_DEVCL_DEVBLC; 233 else 234 eldv = G4X_ELDV_DEVCTG; 235 236 /* Invalidate ELD */ 237 tmp = I915_READ(G4X_AUD_CNTL_ST); 238 tmp &= ~eldv; 239 I915_WRITE(G4X_AUD_CNTL_ST, tmp); 240 } 241 242 static void g4x_audio_codec_enable(struct drm_connector *connector, 243 struct intel_encoder *encoder, 244 const struct drm_display_mode *adjusted_mode) 245 { 246 struct drm_i915_private *dev_priv = to_i915(connector->dev); 247 uint8_t *eld = connector->eld; 248 uint32_t eldv; 249 uint32_t tmp; 250 int len, i; 251 252 DRM_DEBUG_KMS("Enable audio codec, %u bytes ELD\n", eld[2]); 253 254 tmp = I915_READ(G4X_AUD_VID_DID); 255 if (tmp == INTEL_AUDIO_DEVBLC || tmp == INTEL_AUDIO_DEVCL) 256 eldv = G4X_ELDV_DEVCL_DEVBLC; 257 else 258 eldv = G4X_ELDV_DEVCTG; 259 260 if (intel_eld_uptodate(connector, 261 G4X_AUD_CNTL_ST, eldv, 262 G4X_AUD_CNTL_ST, G4X_ELD_ADDR_MASK, 263 G4X_HDMIW_HDMIEDID)) 264 return; 265 266 tmp = I915_READ(G4X_AUD_CNTL_ST); 267 tmp &= ~(eldv | G4X_ELD_ADDR_MASK); 268 len = (tmp >> 9) & 0x1f; /* ELD buffer size */ 269 I915_WRITE(G4X_AUD_CNTL_ST, tmp); 270 271 len = min(drm_eld_size(eld) / 4, len); 272 DRM_DEBUG_DRIVER("ELD size %d\n", len); 273 for (i = 0; i < len; i++) 274 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i)); 275 276 tmp = I915_READ(G4X_AUD_CNTL_ST); 277 tmp |= eldv; 278 I915_WRITE(G4X_AUD_CNTL_ST, tmp); 279 } 280 281 static void 282 hsw_dp_audio_config_update(struct intel_crtc *intel_crtc, enum port port, 283 const struct drm_display_mode *adjusted_mode) 284 { 285 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev); 286 struct i915_audio_component *acomp = dev_priv->audio_component; 287 int rate = acomp ? acomp->aud_sample_rate[port] : 0; 288 const struct dp_aud_n_m *nm = audio_config_dp_get_n_m(intel_crtc, rate); 289 enum i915_pipe pipe = intel_crtc->pipe; 290 u32 tmp; 291 292 if (nm) 293 DRM_DEBUG_KMS("using Maud %u, Naud %u\n", nm->m, nm->n); 294 else 295 DRM_DEBUG_KMS("using automatic Maud, Naud\n"); 296 297 tmp = I915_READ(HSW_AUD_CFG(pipe)); 298 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 299 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK; 300 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 301 tmp |= AUD_CONFIG_N_VALUE_INDEX; 302 303 if (nm) { 304 tmp &= ~AUD_CONFIG_N_MASK; 305 tmp |= AUD_CONFIG_N(nm->n); 306 tmp |= AUD_CONFIG_N_PROG_ENABLE; 307 } 308 309 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 310 311 tmp = I915_READ(HSW_AUD_M_CTS_ENABLE(pipe)); 312 tmp &= ~AUD_CONFIG_M_MASK; 313 tmp &= ~AUD_M_CTS_M_VALUE_INDEX; 314 tmp &= ~AUD_M_CTS_M_PROG_ENABLE; 315 316 if (nm) { 317 tmp |= nm->m; 318 tmp |= AUD_M_CTS_M_VALUE_INDEX; 319 tmp |= AUD_M_CTS_M_PROG_ENABLE; 320 } 321 322 I915_WRITE(HSW_AUD_M_CTS_ENABLE(pipe), tmp); 323 } 324 325 static void 326 hsw_hdmi_audio_config_update(struct intel_crtc *intel_crtc, enum port port, 327 const struct drm_display_mode *adjusted_mode) 328 { 329 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev); 330 struct i915_audio_component *acomp = dev_priv->audio_component; 331 int rate = acomp ? acomp->aud_sample_rate[port] : 0; 332 enum i915_pipe pipe = intel_crtc->pipe; 333 int n; 334 u32 tmp; 335 336 tmp = I915_READ(HSW_AUD_CFG(pipe)); 337 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 338 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK; 339 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 340 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode); 341 342 n = audio_config_hdmi_get_n(adjusted_mode, rate); 343 if (n != 0) { 344 DRM_DEBUG_KMS("using N %d\n", n); 345 346 tmp &= ~AUD_CONFIG_N_MASK; 347 tmp |= AUD_CONFIG_N(n); 348 tmp |= AUD_CONFIG_N_PROG_ENABLE; 349 } else { 350 DRM_DEBUG_KMS("using automatic N\n"); 351 } 352 353 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 354 355 /* 356 * Let's disable "Enable CTS or M Prog bit" 357 * and let HW calculate the value 358 */ 359 tmp = I915_READ(HSW_AUD_M_CTS_ENABLE(pipe)); 360 tmp &= ~AUD_M_CTS_M_PROG_ENABLE; 361 tmp &= ~AUD_M_CTS_M_VALUE_INDEX; 362 I915_WRITE(HSW_AUD_M_CTS_ENABLE(pipe), tmp); 363 } 364 365 static void 366 hsw_audio_config_update(struct intel_crtc *intel_crtc, enum port port, 367 const struct drm_display_mode *adjusted_mode) 368 { 369 if (intel_crtc_has_dp_encoder(intel_crtc->config)) 370 hsw_dp_audio_config_update(intel_crtc, port, adjusted_mode); 371 else 372 hsw_hdmi_audio_config_update(intel_crtc, port, adjusted_mode); 373 } 374 375 static void hsw_audio_codec_disable(struct intel_encoder *encoder) 376 { 377 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 378 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); 379 enum i915_pipe pipe = intel_crtc->pipe; 380 uint32_t tmp; 381 382 DRM_DEBUG_KMS("Disable audio codec on pipe %c\n", pipe_name(pipe)); 383 384 mutex_lock(&dev_priv->av_mutex); 385 386 /* Disable timestamps */ 387 tmp = I915_READ(HSW_AUD_CFG(pipe)); 388 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 389 tmp |= AUD_CONFIG_N_PROG_ENABLE; 390 tmp &= ~AUD_CONFIG_UPPER_N_MASK; 391 tmp &= ~AUD_CONFIG_LOWER_N_MASK; 392 if (intel_crtc_has_dp_encoder(intel_crtc->config)) 393 tmp |= AUD_CONFIG_N_VALUE_INDEX; 394 I915_WRITE(HSW_AUD_CFG(pipe), tmp); 395 396 /* Invalidate ELD */ 397 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); 398 tmp &= ~AUDIO_ELD_VALID(pipe); 399 tmp &= ~AUDIO_OUTPUT_ENABLE(pipe); 400 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp); 401 402 mutex_unlock(&dev_priv->av_mutex); 403 } 404 405 static void hsw_audio_codec_enable(struct drm_connector *connector, 406 struct intel_encoder *intel_encoder, 407 const struct drm_display_mode *adjusted_mode) 408 { 409 struct drm_i915_private *dev_priv = to_i915(connector->dev); 410 struct intel_crtc *intel_crtc = to_intel_crtc(intel_encoder->base.crtc); 411 enum i915_pipe pipe = intel_crtc->pipe; 412 enum port port = intel_encoder->port; 413 const uint8_t *eld = connector->eld; 414 uint32_t tmp; 415 int len, i; 416 417 DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n", 418 pipe_name(pipe), drm_eld_size(eld)); 419 420 mutex_lock(&dev_priv->av_mutex); 421 422 /* Enable audio presence detect, invalidate ELD */ 423 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); 424 tmp |= AUDIO_OUTPUT_ENABLE(pipe); 425 tmp &= ~AUDIO_ELD_VALID(pipe); 426 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp); 427 428 /* 429 * FIXME: We're supposed to wait for vblank here, but we have vblanks 430 * disabled during the mode set. The proper fix would be to push the 431 * rest of the setup into a vblank work item, queued here, but the 432 * infrastructure is not there yet. 433 */ 434 435 /* Reset ELD write address */ 436 tmp = I915_READ(HSW_AUD_DIP_ELD_CTRL(pipe)); 437 tmp &= ~IBX_ELD_ADDRESS_MASK; 438 I915_WRITE(HSW_AUD_DIP_ELD_CTRL(pipe), tmp); 439 440 /* Up to 84 bytes of hw ELD buffer */ 441 len = min(drm_eld_size(eld), 84); 442 for (i = 0; i < len / 4; i++) 443 I915_WRITE(HSW_AUD_EDID_DATA(pipe), *((uint32_t *)eld + i)); 444 445 /* ELD valid */ 446 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); 447 tmp |= AUDIO_ELD_VALID(pipe); 448 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp); 449 450 /* Enable timestamps */ 451 hsw_audio_config_update(intel_crtc, port, adjusted_mode); 452 453 mutex_unlock(&dev_priv->av_mutex); 454 } 455 456 static void ilk_audio_codec_disable(struct intel_encoder *intel_encoder) 457 { 458 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev); 459 struct intel_crtc *intel_crtc = to_intel_crtc(intel_encoder->base.crtc); 460 enum i915_pipe pipe = intel_crtc->pipe; 461 enum port port = intel_encoder->port; 462 uint32_t tmp, eldv; 463 i915_reg_t aud_config, aud_cntrl_st2; 464 465 DRM_DEBUG_KMS("Disable audio codec on port %c, pipe %c\n", 466 port_name(port), pipe_name(pipe)); 467 468 if (WARN_ON(port == PORT_A)) 469 return; 470 471 if (HAS_PCH_IBX(dev_priv)) { 472 aud_config = IBX_AUD_CFG(pipe); 473 aud_cntrl_st2 = IBX_AUD_CNTL_ST2; 474 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 475 aud_config = VLV_AUD_CFG(pipe); 476 aud_cntrl_st2 = VLV_AUD_CNTL_ST2; 477 } else { 478 aud_config = CPT_AUD_CFG(pipe); 479 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2; 480 } 481 482 /* Disable timestamps */ 483 tmp = I915_READ(aud_config); 484 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 485 tmp |= AUD_CONFIG_N_PROG_ENABLE; 486 tmp &= ~AUD_CONFIG_UPPER_N_MASK; 487 tmp &= ~AUD_CONFIG_LOWER_N_MASK; 488 if (intel_crtc_has_dp_encoder(intel_crtc->config)) 489 tmp |= AUD_CONFIG_N_VALUE_INDEX; 490 I915_WRITE(aud_config, tmp); 491 492 eldv = IBX_ELD_VALID(port); 493 494 /* Invalidate ELD */ 495 tmp = I915_READ(aud_cntrl_st2); 496 tmp &= ~eldv; 497 I915_WRITE(aud_cntrl_st2, tmp); 498 } 499 500 static void ilk_audio_codec_enable(struct drm_connector *connector, 501 struct intel_encoder *intel_encoder, 502 const struct drm_display_mode *adjusted_mode) 503 { 504 struct drm_i915_private *dev_priv = to_i915(connector->dev); 505 struct intel_crtc *intel_crtc = to_intel_crtc(intel_encoder->base.crtc); 506 enum i915_pipe pipe = intel_crtc->pipe; 507 enum port port = intel_encoder->port; 508 uint8_t *eld = connector->eld; 509 uint32_t tmp, eldv; 510 int len, i; 511 i915_reg_t hdmiw_hdmiedid, aud_config, aud_cntl_st, aud_cntrl_st2; 512 513 DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n", 514 port_name(port), pipe_name(pipe), drm_eld_size(eld)); 515 516 if (WARN_ON(port == PORT_A)) 517 return; 518 519 /* 520 * FIXME: We're supposed to wait for vblank here, but we have vblanks 521 * disabled during the mode set. The proper fix would be to push the 522 * rest of the setup into a vblank work item, queued here, but the 523 * infrastructure is not there yet. 524 */ 525 526 if (HAS_PCH_IBX(dev_priv)) { 527 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe); 528 aud_config = IBX_AUD_CFG(pipe); 529 aud_cntl_st = IBX_AUD_CNTL_ST(pipe); 530 aud_cntrl_st2 = IBX_AUD_CNTL_ST2; 531 } else if (IS_VALLEYVIEW(dev_priv) || 532 IS_CHERRYVIEW(dev_priv)) { 533 hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe); 534 aud_config = VLV_AUD_CFG(pipe); 535 aud_cntl_st = VLV_AUD_CNTL_ST(pipe); 536 aud_cntrl_st2 = VLV_AUD_CNTL_ST2; 537 } else { 538 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe); 539 aud_config = CPT_AUD_CFG(pipe); 540 aud_cntl_st = CPT_AUD_CNTL_ST(pipe); 541 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2; 542 } 543 544 eldv = IBX_ELD_VALID(port); 545 546 /* Invalidate ELD */ 547 tmp = I915_READ(aud_cntrl_st2); 548 tmp &= ~eldv; 549 I915_WRITE(aud_cntrl_st2, tmp); 550 551 /* Reset ELD write address */ 552 tmp = I915_READ(aud_cntl_st); 553 tmp &= ~IBX_ELD_ADDRESS_MASK; 554 I915_WRITE(aud_cntl_st, tmp); 555 556 /* Up to 84 bytes of hw ELD buffer */ 557 len = min(drm_eld_size(eld), 84); 558 for (i = 0; i < len / 4; i++) 559 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i)); 560 561 /* ELD valid */ 562 tmp = I915_READ(aud_cntrl_st2); 563 tmp |= eldv; 564 I915_WRITE(aud_cntrl_st2, tmp); 565 566 /* Enable timestamps */ 567 tmp = I915_READ(aud_config); 568 tmp &= ~AUD_CONFIG_N_VALUE_INDEX; 569 tmp &= ~AUD_CONFIG_N_PROG_ENABLE; 570 tmp &= ~AUD_CONFIG_PIXEL_CLOCK_HDMI_MASK; 571 if (intel_crtc_has_dp_encoder(intel_crtc->config)) 572 tmp |= AUD_CONFIG_N_VALUE_INDEX; 573 else 574 tmp |= audio_config_hdmi_pixel_clock(adjusted_mode); 575 I915_WRITE(aud_config, tmp); 576 } 577 578 /** 579 * intel_audio_codec_enable - Enable the audio codec for HD audio 580 * @intel_encoder: encoder on which to enable audio 581 * @crtc_state: pointer to the current crtc state. 582 * @conn_state: pointer to the current connector state. 583 * 584 * The enable sequences may only be performed after enabling the transcoder and 585 * port, and after completed link training. 586 */ 587 void intel_audio_codec_enable(struct intel_encoder *intel_encoder, 588 const struct intel_crtc_state *crtc_state, 589 const struct drm_connector_state *conn_state) 590 { 591 struct drm_encoder *encoder = &intel_encoder->base; 592 const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode; 593 struct drm_connector *connector; 594 struct drm_i915_private *dev_priv = to_i915(encoder->dev); 595 struct i915_audio_component *acomp = dev_priv->audio_component; 596 enum port port = intel_encoder->port; 597 enum i915_pipe pipe = to_intel_crtc(crtc_state->base.crtc)->pipe; 598 599 connector = conn_state->connector; 600 if (!connector || !connector->eld[0]) 601 return; 602 603 DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n", 604 connector->base.id, 605 connector->name, 606 connector->encoder->base.id, 607 connector->encoder->name); 608 609 /* ELD Conn_Type */ 610 connector->eld[5] &= ~(3 << 2); 611 if (intel_crtc_has_dp_encoder(crtc_state)) 612 connector->eld[5] |= (1 << 2); 613 614 connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2; 615 616 if (dev_priv->display.audio_codec_enable) 617 dev_priv->display.audio_codec_enable(connector, intel_encoder, 618 adjusted_mode); 619 620 mutex_lock(&dev_priv->av_mutex); 621 intel_encoder->audio_connector = connector; 622 623 /* referred in audio callbacks */ 624 dev_priv->av_enc_map[pipe] = intel_encoder; 625 mutex_unlock(&dev_priv->av_mutex); 626 627 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) { 628 /* audio drivers expect pipe = -1 to indicate Non-MST cases */ 629 if (intel_encoder->type != INTEL_OUTPUT_DP_MST) 630 pipe = -1; 631 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, 632 (int) port, (int) pipe); 633 } 634 635 switch (intel_encoder->type) { 636 case INTEL_OUTPUT_HDMI: 637 intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe, 638 crtc_state->port_clock, 639 false, 0); 640 break; 641 case INTEL_OUTPUT_DP: 642 intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe, 643 adjusted_mode->crtc_clock, 644 true, crtc_state->port_clock); 645 break; 646 default: 647 break; 648 } 649 } 650 651 /** 652 * intel_audio_codec_disable - Disable the audio codec for HD audio 653 * @intel_encoder: encoder on which to disable audio 654 * 655 * The disable sequences must be performed before disabling the transcoder or 656 * port. 657 */ 658 void intel_audio_codec_disable(struct intel_encoder *intel_encoder) 659 { 660 struct drm_encoder *encoder = &intel_encoder->base; 661 struct drm_i915_private *dev_priv = to_i915(encoder->dev); 662 struct i915_audio_component *acomp = dev_priv->audio_component; 663 enum port port = intel_encoder->port; 664 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc); 665 enum i915_pipe pipe = crtc->pipe; 666 667 if (dev_priv->display.audio_codec_disable) 668 dev_priv->display.audio_codec_disable(intel_encoder); 669 670 mutex_lock(&dev_priv->av_mutex); 671 intel_encoder->audio_connector = NULL; 672 dev_priv->av_enc_map[pipe] = NULL; 673 mutex_unlock(&dev_priv->av_mutex); 674 675 if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify) { 676 /* audio drivers expect pipe = -1 to indicate Non-MST cases */ 677 if (intel_encoder->type != INTEL_OUTPUT_DP_MST) 678 pipe = -1; 679 acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr, 680 (int) port, (int) pipe); 681 } 682 683 intel_lpe_audio_notify(dev_priv, NULL, port, pipe, 0, false, 0); 684 } 685 686 /** 687 * intel_init_audio_hooks - Set up chip specific audio hooks 688 * @dev_priv: device private 689 */ 690 void intel_init_audio_hooks(struct drm_i915_private *dev_priv) 691 { 692 if (IS_G4X(dev_priv)) { 693 dev_priv->display.audio_codec_enable = g4x_audio_codec_enable; 694 dev_priv->display.audio_codec_disable = g4x_audio_codec_disable; 695 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 696 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable; 697 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable; 698 } else if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8) { 699 dev_priv->display.audio_codec_enable = hsw_audio_codec_enable; 700 dev_priv->display.audio_codec_disable = hsw_audio_codec_disable; 701 } else if (HAS_PCH_SPLIT(dev_priv)) { 702 dev_priv->display.audio_codec_enable = ilk_audio_codec_enable; 703 dev_priv->display.audio_codec_disable = ilk_audio_codec_disable; 704 } 705 } 706 707 #if 0 708 static void i915_audio_component_get_power(struct device *kdev) 709 { 710 intel_display_power_get(kdev_to_i915(kdev), POWER_DOMAIN_AUDIO); 711 } 712 713 static void i915_audio_component_put_power(struct device *kdev) 714 { 715 intel_display_power_put(kdev_to_i915(kdev), POWER_DOMAIN_AUDIO); 716 } 717 718 static void i915_audio_component_codec_wake_override(struct device *kdev, 719 bool enable) 720 { 721 struct drm_i915_private *dev_priv = kdev_to_i915(kdev); 722 u32 tmp; 723 724 if (!IS_GEN9_BC(dev_priv)) 725 return; 726 727 i915_audio_component_get_power(kdev); 728 729 /* 730 * Enable/disable generating the codec wake signal, overriding the 731 * internal logic to generate the codec wake to controller. 732 */ 733 tmp = I915_READ(HSW_AUD_CHICKENBIT); 734 tmp &= ~SKL_AUD_CODEC_WAKE_SIGNAL; 735 I915_WRITE(HSW_AUD_CHICKENBIT, tmp); 736 usleep_range(1000, 1500); 737 738 if (enable) { 739 tmp = I915_READ(HSW_AUD_CHICKENBIT); 740 tmp |= SKL_AUD_CODEC_WAKE_SIGNAL; 741 I915_WRITE(HSW_AUD_CHICKENBIT, tmp); 742 usleep_range(1000, 1500); 743 } 744 745 i915_audio_component_put_power(kdev); 746 } 747 748 /* Get CDCLK in kHz */ 749 static int i915_audio_component_get_cdclk_freq(struct device *kdev) 750 { 751 struct drm_i915_private *dev_priv = kdev_to_i915(kdev); 752 753 if (WARN_ON_ONCE(!HAS_DDI(dev_priv))) 754 return -ENODEV; 755 756 return dev_priv->cdclk.hw.cdclk; 757 } 758 759 /* 760 * get the intel_encoder according to the parameter port and pipe 761 * intel_encoder is saved by the index of pipe 762 * MST & (pipe >= 0): return the av_enc_map[pipe], 763 * when port is matched 764 * MST & (pipe < 0): this is invalid 765 * Non-MST & (pipe >= 0): only pipe = 0 (the first device entry) 766 * will get the right intel_encoder with port matched 767 * Non-MST & (pipe < 0): get the right intel_encoder with port matched 768 */ 769 static struct intel_encoder *get_saved_enc(struct drm_i915_private *dev_priv, 770 int port, int pipe) 771 { 772 struct intel_encoder *encoder; 773 774 if (WARN_ON(pipe >= I915_MAX_PIPES)) 775 return NULL; 776 777 /* MST */ 778 if (pipe >= 0) { 779 encoder = dev_priv->av_enc_map[pipe]; 780 /* 781 * when bootup, audio driver may not know it is 782 * MST or not. So it will poll all the port & pipe 783 * combinations 784 */ 785 if (encoder != NULL && encoder->port == port && 786 encoder->type == INTEL_OUTPUT_DP_MST) 787 return encoder; 788 } 789 790 /* Non-MST */ 791 if (pipe > 0) 792 return NULL; 793 794 for_each_pipe(dev_priv, pipe) { 795 encoder = dev_priv->av_enc_map[pipe]; 796 if (encoder == NULL) 797 continue; 798 799 if (encoder->type == INTEL_OUTPUT_DP_MST) 800 continue; 801 802 if (port == encoder->port) 803 return encoder; 804 } 805 806 return NULL; 807 } 808 809 static int i915_audio_component_sync_audio_rate(struct device *kdev, int port, 810 int pipe, int rate) 811 { 812 struct drm_i915_private *dev_priv = kdev_to_i915(kdev); 813 struct intel_encoder *intel_encoder; 814 struct intel_crtc *crtc; 815 struct drm_display_mode *adjusted_mode; 816 struct i915_audio_component *acomp = dev_priv->audio_component; 817 int err = 0; 818 819 if (!HAS_DDI(dev_priv)) 820 return 0; 821 822 i915_audio_component_get_power(kdev); 823 mutex_lock(&dev_priv->av_mutex); 824 825 /* 1. get the pipe */ 826 intel_encoder = get_saved_enc(dev_priv, port, pipe); 827 if (!intel_encoder || !intel_encoder->base.crtc) { 828 DRM_DEBUG_KMS("Not valid for port %c\n", port_name(port)); 829 err = -ENODEV; 830 goto unlock; 831 } 832 833 /* pipe passed from the audio driver will be -1 for Non-MST case */ 834 crtc = to_intel_crtc(intel_encoder->base.crtc); 835 pipe = crtc->pipe; 836 837 adjusted_mode = &crtc->config->base.adjusted_mode; 838 839 /* port must be valid now, otherwise the pipe will be invalid */ 840 acomp->aud_sample_rate[port] = rate; 841 842 hsw_audio_config_update(crtc, port, adjusted_mode); 843 844 unlock: 845 mutex_unlock(&dev_priv->av_mutex); 846 i915_audio_component_put_power(kdev); 847 return err; 848 } 849 850 static int i915_audio_component_get_eld(struct device *kdev, int port, 851 int pipe, bool *enabled, 852 unsigned char *buf, int max_bytes) 853 { 854 struct drm_i915_private *dev_priv = kdev_to_i915(kdev); 855 struct intel_encoder *intel_encoder; 856 const u8 *eld; 857 int ret = -EINVAL; 858 859 mutex_lock(&dev_priv->av_mutex); 860 861 intel_encoder = get_saved_enc(dev_priv, port, pipe); 862 if (!intel_encoder) { 863 DRM_DEBUG_KMS("Not valid for port %c\n", port_name(port)); 864 mutex_unlock(&dev_priv->av_mutex); 865 return ret; 866 } 867 868 ret = 0; 869 *enabled = intel_encoder->audio_connector != NULL; 870 if (*enabled) { 871 eld = intel_encoder->audio_connector->eld; 872 ret = drm_eld_size(eld); 873 memcpy(buf, eld, min(max_bytes, ret)); 874 } 875 876 mutex_unlock(&dev_priv->av_mutex); 877 return ret; 878 } 879 880 static const struct i915_audio_component_ops i915_audio_component_ops = { 881 .owner = THIS_MODULE, 882 .get_power = i915_audio_component_get_power, 883 .put_power = i915_audio_component_put_power, 884 .codec_wake_override = i915_audio_component_codec_wake_override, 885 .get_cdclk_freq = i915_audio_component_get_cdclk_freq, 886 .sync_audio_rate = i915_audio_component_sync_audio_rate, 887 .get_eld = i915_audio_component_get_eld, 888 }; 889 890 static int i915_audio_component_bind(struct device *i915_kdev, 891 struct device *hda_kdev, void *data) 892 { 893 struct i915_audio_component *acomp = data; 894 struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev); 895 int i; 896 897 if (WARN_ON(acomp->ops || acomp->dev)) 898 return -EEXIST; 899 900 drm_modeset_lock_all(&dev_priv->drm); 901 acomp->ops = &i915_audio_component_ops; 902 acomp->dev = i915_kdev; 903 BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS); 904 for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++) 905 acomp->aud_sample_rate[i] = 0; 906 dev_priv->audio_component = acomp; 907 drm_modeset_unlock_all(&dev_priv->drm); 908 909 return 0; 910 } 911 912 static void i915_audio_component_unbind(struct device *i915_kdev, 913 struct device *hda_kdev, void *data) 914 { 915 struct i915_audio_component *acomp = data; 916 struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev); 917 918 drm_modeset_lock_all(&dev_priv->drm); 919 acomp->ops = NULL; 920 acomp->dev = NULL; 921 dev_priv->audio_component = NULL; 922 drm_modeset_unlock_all(&dev_priv->drm); 923 } 924 925 static const struct component_ops i915_audio_component_bind_ops = { 926 .bind = i915_audio_component_bind, 927 .unbind = i915_audio_component_unbind, 928 }; 929 #endif 930 931 /** 932 * i915_audio_component_init - initialize and register the audio component 933 * @dev_priv: i915 device instance 934 * 935 * This will register with the component framework a child component which 936 * will bind dynamically to the snd_hda_intel driver's corresponding master 937 * component when the latter is registered. During binding the child 938 * initializes an instance of struct i915_audio_component which it receives 939 * from the master. The master can then start to use the interface defined by 940 * this struct. Each side can break the binding at any point by deregistering 941 * its own component after which each side's component unbind callback is 942 * called. 943 * 944 * We ignore any error during registration and continue with reduced 945 * functionality (i.e. without HDMI audio). 946 */ 947 void i915_audio_component_init(struct drm_i915_private *dev_priv) 948 { 949 #if 0 950 int ret; 951 952 if (INTEL_INFO(dev_priv)->num_pipes == 0) 953 return; 954 955 ret = component_add(dev_priv->drm.dev, &i915_audio_component_bind_ops); 956 if (ret < 0) { 957 DRM_ERROR("failed to add audio component (%d)\n", ret); 958 /* continue with reduced functionality */ 959 return; 960 } 961 #endif 962 963 dev_priv->audio_component_registered = true; 964 } 965 966 /** 967 * i915_audio_component_cleanup - deregister the audio component 968 * @dev_priv: i915 device instance 969 * 970 * Deregisters the audio component, breaking any existing binding to the 971 * corresponding snd_hda_intel driver's master component. 972 */ 973 void i915_audio_component_cleanup(struct drm_i915_private *dev_priv) 974 { 975 if (!dev_priv->audio_component_registered) 976 return; 977 978 #if 0 979 component_del(dev_priv->drm.dev, &i915_audio_component_bind_ops); 980 #endif 981 dev_priv->audio_component_registered = false; 982 } 983 984 /** 985 * intel_audio_init() - Initialize the audio driver either using 986 * component framework or using lpe audio bridge 987 * @dev_priv: the i915 drm device private data 988 * 989 */ 990 void intel_audio_init(struct drm_i915_private *dev_priv) 991 { 992 if (intel_lpe_audio_init(dev_priv) < 0) 993 i915_audio_component_init(dev_priv); 994 } 995 996 /** 997 * intel_audio_deinit() - deinitialize the audio driver 998 * @dev_priv: the i915 drm device private data 999 * 1000 */ 1001 void intel_audio_deinit(struct drm_i915_private *dev_priv) 1002 { 1003 if ((dev_priv)->lpe_audio.platdev != NULL) 1004 intel_lpe_audio_teardown(dev_priv); 1005 else 1006 i915_audio_component_cleanup(dev_priv); 1007 } 1008