1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2020 Intel Corporation 4 * 5 * DisplayPort support for G4x,ILK,SNB,IVB,VLV,CHV (HSW+ handled by the DDI code). 6 */ 7 8 #include <linux/string_helpers.h> 9 10 #include "g4x_dp.h" 11 #include "i915_reg.h" 12 #include "intel_audio.h" 13 #include "intel_backlight.h" 14 #include "intel_connector.h" 15 #include "intel_crtc.h" 16 #include "intel_de.h" 17 #include "intel_display_power.h" 18 #include "intel_display_types.h" 19 #include "intel_dp.h" 20 #include "intel_dp_aux.h" 21 #include "intel_dp_link_training.h" 22 #include "intel_dpio_phy.h" 23 #include "intel_fifo_underrun.h" 24 #include "intel_hdmi.h" 25 #include "intel_hotplug.h" 26 #include "intel_pch_display.h" 27 #include "intel_pps.h" 28 #include "vlv_sideband.h" 29 30 static const struct dpll g4x_dpll[] = { 31 { .dot = 162000, .p1 = 2, .p2 = 10, .n = 2, .m1 = 23, .m2 = 8, }, 32 { .dot = 270000, .p1 = 1, .p2 = 10, .n = 1, .m1 = 14, .m2 = 2, }, 33 }; 34 35 static const struct dpll pch_dpll[] = { 36 { .dot = 162000, .p1 = 2, .p2 = 10, .n = 1, .m1 = 12, .m2 = 9, }, 37 { .dot = 270000, .p1 = 1, .p2 = 10, .n = 2, .m1 = 14, .m2 = 8, }, 38 }; 39 40 static const struct dpll vlv_dpll[] = { 41 { .dot = 162000, .p1 = 3, .p2 = 2, .n = 5, .m1 = 3, .m2 = 81, }, 42 { .dot = 270000, .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27, }, 43 }; 44 45 static const struct dpll chv_dpll[] = { 46 /* m2 is .22 binary fixed point */ 47 { .dot = 162000, .p1 = 4, .p2 = 2, .n = 1, .m1 = 2, .m2 = 0x819999a /* 32.4 */ }, 48 { .dot = 270000, .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 /* 27.0 */ }, 49 }; 50 51 const struct dpll *vlv_get_dpll(struct drm_i915_private *i915) 52 { 53 return IS_CHERRYVIEW(i915) ? &chv_dpll[0] : &vlv_dpll[0]; 54 } 55 56 void g4x_dp_set_clock(struct intel_encoder *encoder, 57 struct intel_crtc_state *pipe_config) 58 { 59 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 60 const struct dpll *divisor = NULL; 61 int i, count = 0; 62 63 if (IS_G4X(dev_priv)) { 64 divisor = g4x_dpll; 65 count = ARRAY_SIZE(g4x_dpll); 66 } else if (HAS_PCH_SPLIT(dev_priv)) { 67 divisor = pch_dpll; 68 count = ARRAY_SIZE(pch_dpll); 69 } else if (IS_CHERRYVIEW(dev_priv)) { 70 divisor = chv_dpll; 71 count = ARRAY_SIZE(chv_dpll); 72 } else if (IS_VALLEYVIEW(dev_priv)) { 73 divisor = vlv_dpll; 74 count = ARRAY_SIZE(vlv_dpll); 75 } 76 77 if (divisor && count) { 78 for (i = 0; i < count; i++) { 79 if (pipe_config->port_clock == divisor[i].dot) { 80 pipe_config->dpll = divisor[i]; 81 pipe_config->clock_set = true; 82 break; 83 } 84 } 85 } 86 } 87 88 static void intel_dp_prepare(struct intel_encoder *encoder, 89 const struct intel_crtc_state *pipe_config) 90 { 91 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 92 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 93 enum port port = encoder->port; 94 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); 95 const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; 96 97 intel_dp_set_link_params(intel_dp, 98 pipe_config->port_clock, 99 pipe_config->lane_count); 100 101 /* 102 * There are four kinds of DP registers: 103 * IBX PCH 104 * SNB CPU 105 * IVB CPU 106 * CPT PCH 107 * 108 * IBX PCH and CPU are the same for almost everything, 109 * except that the CPU DP PLL is configured in this 110 * register 111 * 112 * CPT PCH is quite different, having many bits moved 113 * to the TRANS_DP_CTL register instead. That 114 * configuration happens (oddly) in ilk_pch_enable 115 */ 116 117 /* Preserve the BIOS-computed detected bit. This is 118 * supposed to be read-only. 119 */ 120 intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED; 121 122 /* Handle DP bits in common between all three register formats */ 123 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; 124 intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count); 125 126 /* Split out the IBX/CPU vs CPT settings */ 127 128 if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) { 129 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 130 intel_dp->DP |= DP_SYNC_HS_HIGH; 131 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 132 intel_dp->DP |= DP_SYNC_VS_HIGH; 133 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; 134 135 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd)) 136 intel_dp->DP |= DP_ENHANCED_FRAMING; 137 138 intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe); 139 } else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) { 140 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; 141 142 intel_de_rmw(dev_priv, TRANS_DP_CTL(crtc->pipe), 143 TRANS_DP_ENH_FRAMING, 144 pipe_config->enhanced_framing ? 145 TRANS_DP_ENH_FRAMING : 0); 146 } else { 147 if (IS_G4X(dev_priv) && pipe_config->limited_color_range) 148 intel_dp->DP |= DP_COLOR_RANGE_16_235; 149 150 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 151 intel_dp->DP |= DP_SYNC_HS_HIGH; 152 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 153 intel_dp->DP |= DP_SYNC_VS_HIGH; 154 intel_dp->DP |= DP_LINK_TRAIN_OFF; 155 156 if (pipe_config->enhanced_framing) 157 intel_dp->DP |= DP_ENHANCED_FRAMING; 158 159 if (IS_CHERRYVIEW(dev_priv)) 160 intel_dp->DP |= DP_PIPE_SEL_CHV(crtc->pipe); 161 else 162 intel_dp->DP |= DP_PIPE_SEL(crtc->pipe); 163 } 164 } 165 166 static void assert_dp_port(struct intel_dp *intel_dp, bool state) 167 { 168 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); 169 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev); 170 bool cur_state = intel_de_read(dev_priv, intel_dp->output_reg) & DP_PORT_EN; 171 172 I915_STATE_WARN(dev_priv, cur_state != state, 173 "[ENCODER:%d:%s] state assertion failure (expected %s, current %s)\n", 174 dig_port->base.base.base.id, dig_port->base.base.name, 175 str_on_off(state), str_on_off(cur_state)); 176 } 177 #define assert_dp_port_disabled(d) assert_dp_port((d), false) 178 179 static void assert_edp_pll(struct drm_i915_private *dev_priv, bool state) 180 { 181 bool cur_state = intel_de_read(dev_priv, DP_A) & DP_PLL_ENABLE; 182 183 I915_STATE_WARN(dev_priv, cur_state != state, 184 "eDP PLL state assertion failure (expected %s, current %s)\n", 185 str_on_off(state), str_on_off(cur_state)); 186 } 187 #define assert_edp_pll_enabled(d) assert_edp_pll((d), true) 188 #define assert_edp_pll_disabled(d) assert_edp_pll((d), false) 189 190 static void ilk_edp_pll_on(struct intel_dp *intel_dp, 191 const struct intel_crtc_state *pipe_config) 192 { 193 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); 194 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); 195 196 assert_transcoder_disabled(dev_priv, pipe_config->cpu_transcoder); 197 assert_dp_port_disabled(intel_dp); 198 assert_edp_pll_disabled(dev_priv); 199 200 drm_dbg_kms(&dev_priv->drm, "enabling eDP PLL for clock %d\n", 201 pipe_config->port_clock); 202 203 intel_dp->DP &= ~DP_PLL_FREQ_MASK; 204 205 if (pipe_config->port_clock == 162000) 206 intel_dp->DP |= DP_PLL_FREQ_162MHZ; 207 else 208 intel_dp->DP |= DP_PLL_FREQ_270MHZ; 209 210 intel_de_write(dev_priv, DP_A, intel_dp->DP); 211 intel_de_posting_read(dev_priv, DP_A); 212 udelay(500); 213 214 /* 215 * [DevILK] Work around required when enabling DP PLL 216 * while a pipe is enabled going to FDI: 217 * 1. Wait for the start of vertical blank on the enabled pipe going to FDI 218 * 2. Program DP PLL enable 219 */ 220 if (IS_IRONLAKE(dev_priv)) 221 intel_wait_for_vblank_if_active(dev_priv, !crtc->pipe); 222 223 intel_dp->DP |= DP_PLL_ENABLE; 224 225 intel_de_write(dev_priv, DP_A, intel_dp->DP); 226 intel_de_posting_read(dev_priv, DP_A); 227 udelay(200); 228 } 229 230 static void ilk_edp_pll_off(struct intel_dp *intel_dp, 231 const struct intel_crtc_state *old_crtc_state) 232 { 233 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc); 234 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); 235 236 assert_transcoder_disabled(dev_priv, old_crtc_state->cpu_transcoder); 237 assert_dp_port_disabled(intel_dp); 238 assert_edp_pll_enabled(dev_priv); 239 240 drm_dbg_kms(&dev_priv->drm, "disabling eDP PLL\n"); 241 242 intel_dp->DP &= ~DP_PLL_ENABLE; 243 244 intel_de_write(dev_priv, DP_A, intel_dp->DP); 245 intel_de_posting_read(dev_priv, DP_A); 246 udelay(200); 247 } 248 249 static bool cpt_dp_port_selected(struct drm_i915_private *dev_priv, 250 enum port port, enum pipe *pipe) 251 { 252 enum pipe p; 253 254 for_each_pipe(dev_priv, p) { 255 u32 val = intel_de_read(dev_priv, TRANS_DP_CTL(p)); 256 257 if ((val & TRANS_DP_PORT_SEL_MASK) == TRANS_DP_PORT_SEL(port)) { 258 *pipe = p; 259 return true; 260 } 261 } 262 263 drm_dbg_kms(&dev_priv->drm, "No pipe for DP port %c found\n", 264 port_name(port)); 265 266 /* must initialize pipe to something for the asserts */ 267 *pipe = PIPE_A; 268 269 return false; 270 } 271 272 bool g4x_dp_port_enabled(struct drm_i915_private *dev_priv, 273 i915_reg_t dp_reg, enum port port, 274 enum pipe *pipe) 275 { 276 bool ret; 277 u32 val; 278 279 val = intel_de_read(dev_priv, dp_reg); 280 281 ret = val & DP_PORT_EN; 282 283 /* asserts want to know the pipe even if the port is disabled */ 284 if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) 285 *pipe = (val & DP_PIPE_SEL_MASK_IVB) >> DP_PIPE_SEL_SHIFT_IVB; 286 else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) 287 ret &= cpt_dp_port_selected(dev_priv, port, pipe); 288 else if (IS_CHERRYVIEW(dev_priv)) 289 *pipe = (val & DP_PIPE_SEL_MASK_CHV) >> DP_PIPE_SEL_SHIFT_CHV; 290 else 291 *pipe = (val & DP_PIPE_SEL_MASK) >> DP_PIPE_SEL_SHIFT; 292 293 return ret; 294 } 295 296 static bool intel_dp_get_hw_state(struct intel_encoder *encoder, 297 enum pipe *pipe) 298 { 299 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 300 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 301 intel_wakeref_t wakeref; 302 bool ret; 303 304 wakeref = intel_display_power_get_if_enabled(dev_priv, 305 encoder->power_domain); 306 if (!wakeref) 307 return false; 308 309 ret = g4x_dp_port_enabled(dev_priv, intel_dp->output_reg, 310 encoder->port, pipe); 311 312 intel_display_power_put(dev_priv, encoder->power_domain, wakeref); 313 314 return ret; 315 } 316 317 static void g4x_dp_get_m_n(struct intel_crtc_state *crtc_state) 318 { 319 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); 320 321 if (crtc_state->has_pch_encoder) { 322 intel_pch_transcoder_get_m1_n1(crtc, &crtc_state->dp_m_n); 323 intel_pch_transcoder_get_m2_n2(crtc, &crtc_state->dp_m2_n2); 324 } else { 325 intel_cpu_transcoder_get_m1_n1(crtc, crtc_state->cpu_transcoder, 326 &crtc_state->dp_m_n); 327 intel_cpu_transcoder_get_m2_n2(crtc, crtc_state->cpu_transcoder, 328 &crtc_state->dp_m2_n2); 329 } 330 } 331 332 static void intel_dp_get_config(struct intel_encoder *encoder, 333 struct intel_crtc_state *pipe_config) 334 { 335 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 336 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 337 u32 tmp, flags = 0; 338 enum port port = encoder->port; 339 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); 340 341 if (encoder->type == INTEL_OUTPUT_EDP) 342 pipe_config->output_types |= BIT(INTEL_OUTPUT_EDP); 343 else 344 pipe_config->output_types |= BIT(INTEL_OUTPUT_DP); 345 346 tmp = intel_de_read(dev_priv, intel_dp->output_reg); 347 348 pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A; 349 350 if (HAS_PCH_CPT(dev_priv) && port != PORT_A) { 351 u32 trans_dp = intel_de_read(dev_priv, 352 TRANS_DP_CTL(crtc->pipe)); 353 354 if (trans_dp & TRANS_DP_ENH_FRAMING) 355 pipe_config->enhanced_framing = true; 356 357 if (trans_dp & TRANS_DP_HSYNC_ACTIVE_HIGH) 358 flags |= DRM_MODE_FLAG_PHSYNC; 359 else 360 flags |= DRM_MODE_FLAG_NHSYNC; 361 362 if (trans_dp & TRANS_DP_VSYNC_ACTIVE_HIGH) 363 flags |= DRM_MODE_FLAG_PVSYNC; 364 else 365 flags |= DRM_MODE_FLAG_NVSYNC; 366 } else { 367 if (tmp & DP_ENHANCED_FRAMING) 368 pipe_config->enhanced_framing = true; 369 370 if (tmp & DP_SYNC_HS_HIGH) 371 flags |= DRM_MODE_FLAG_PHSYNC; 372 else 373 flags |= DRM_MODE_FLAG_NHSYNC; 374 375 if (tmp & DP_SYNC_VS_HIGH) 376 flags |= DRM_MODE_FLAG_PVSYNC; 377 else 378 flags |= DRM_MODE_FLAG_NVSYNC; 379 } 380 381 pipe_config->hw.adjusted_mode.flags |= flags; 382 383 if (IS_G4X(dev_priv) && tmp & DP_COLOR_RANGE_16_235) 384 pipe_config->limited_color_range = true; 385 386 pipe_config->lane_count = 387 ((tmp & DP_PORT_WIDTH_MASK) >> DP_PORT_WIDTH_SHIFT) + 1; 388 389 g4x_dp_get_m_n(pipe_config); 390 391 if (port == PORT_A) { 392 if ((intel_de_read(dev_priv, DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_162MHZ) 393 pipe_config->port_clock = 162000; 394 else 395 pipe_config->port_clock = 270000; 396 } 397 398 pipe_config->hw.adjusted_mode.crtc_clock = 399 intel_dotclock_calculate(pipe_config->port_clock, 400 &pipe_config->dp_m_n); 401 402 if (intel_dp_is_edp(intel_dp)) 403 intel_edp_fixup_vbt_bpp(encoder, pipe_config->pipe_bpp); 404 405 intel_audio_codec_get_config(encoder, pipe_config); 406 } 407 408 static void 409 intel_dp_link_down(struct intel_encoder *encoder, 410 const struct intel_crtc_state *old_crtc_state) 411 { 412 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 413 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 414 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc); 415 enum port port = encoder->port; 416 417 if (drm_WARN_ON(&dev_priv->drm, 418 (intel_de_read(dev_priv, intel_dp->output_reg) & 419 DP_PORT_EN) == 0)) 420 return; 421 422 drm_dbg_kms(&dev_priv->drm, "\n"); 423 424 if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) || 425 (HAS_PCH_CPT(dev_priv) && port != PORT_A)) { 426 intel_dp->DP &= ~DP_LINK_TRAIN_MASK_CPT; 427 intel_dp->DP |= DP_LINK_TRAIN_PAT_IDLE_CPT; 428 } else { 429 intel_dp->DP &= ~DP_LINK_TRAIN_MASK; 430 intel_dp->DP |= DP_LINK_TRAIN_PAT_IDLE; 431 } 432 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 433 intel_de_posting_read(dev_priv, intel_dp->output_reg); 434 435 intel_dp->DP &= ~DP_PORT_EN; 436 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 437 intel_de_posting_read(dev_priv, intel_dp->output_reg); 438 439 /* 440 * HW workaround for IBX, we need to move the port 441 * to transcoder A after disabling it to allow the 442 * matching HDMI port to be enabled on transcoder A. 443 */ 444 if (HAS_PCH_IBX(dev_priv) && crtc->pipe == PIPE_B && port != PORT_A) { 445 /* 446 * We get CPU/PCH FIFO underruns on the other pipe when 447 * doing the workaround. Sweep them under the rug. 448 */ 449 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, false); 450 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false); 451 452 /* always enable with pattern 1 (as per spec) */ 453 intel_dp->DP &= ~(DP_PIPE_SEL_MASK | DP_LINK_TRAIN_MASK); 454 intel_dp->DP |= DP_PORT_EN | DP_PIPE_SEL(PIPE_A) | 455 DP_LINK_TRAIN_PAT_1; 456 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 457 intel_de_posting_read(dev_priv, intel_dp->output_reg); 458 459 intel_dp->DP &= ~DP_PORT_EN; 460 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 461 intel_de_posting_read(dev_priv, intel_dp->output_reg); 462 463 intel_wait_for_vblank_if_active(dev_priv, PIPE_A); 464 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, true); 465 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true); 466 } 467 468 msleep(intel_dp->pps.panel_power_down_delay); 469 470 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 471 intel_wakeref_t wakeref; 472 473 with_intel_pps_lock(intel_dp, wakeref) 474 intel_dp->pps.active_pipe = INVALID_PIPE; 475 } 476 } 477 478 static void g4x_dp_audio_enable(struct intel_encoder *encoder, 479 const struct intel_crtc_state *crtc_state, 480 const struct drm_connector_state *conn_state) 481 { 482 struct drm_i915_private *i915 = to_i915(encoder->base.dev); 483 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 484 485 if (!crtc_state->has_audio) 486 return; 487 488 /* Enable audio presence detect */ 489 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; 490 intel_de_write(i915, intel_dp->output_reg, intel_dp->DP); 491 492 intel_audio_codec_enable(encoder, crtc_state, conn_state); 493 } 494 495 static void g4x_dp_audio_disable(struct intel_encoder *encoder, 496 const struct intel_crtc_state *old_crtc_state, 497 const struct drm_connector_state *old_conn_state) 498 { 499 struct drm_i915_private *i915 = to_i915(encoder->base.dev); 500 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 501 502 if (!old_crtc_state->has_audio) 503 return; 504 505 intel_audio_codec_disable(encoder, old_crtc_state, old_conn_state); 506 507 /* Disable audio presence detect */ 508 intel_dp->DP &= ~DP_AUDIO_OUTPUT_ENABLE; 509 intel_de_write(i915, intel_dp->output_reg, intel_dp->DP); 510 } 511 512 static void intel_disable_dp(struct intel_atomic_state *state, 513 struct intel_encoder *encoder, 514 const struct intel_crtc_state *old_crtc_state, 515 const struct drm_connector_state *old_conn_state) 516 { 517 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 518 519 intel_dp->link_trained = false; 520 521 /* 522 * Make sure the panel is off before trying to change the mode. 523 * But also ensure that we have vdd while we switch off the panel. 524 */ 525 intel_pps_vdd_on(intel_dp); 526 intel_edp_backlight_off(old_conn_state); 527 intel_dp_set_power(intel_dp, DP_SET_POWER_D3); 528 intel_pps_off(intel_dp); 529 } 530 531 static void g4x_disable_dp(struct intel_atomic_state *state, 532 struct intel_encoder *encoder, 533 const struct intel_crtc_state *old_crtc_state, 534 const struct drm_connector_state *old_conn_state) 535 { 536 intel_disable_dp(state, encoder, old_crtc_state, old_conn_state); 537 } 538 539 static void vlv_disable_dp(struct intel_atomic_state *state, 540 struct intel_encoder *encoder, 541 const struct intel_crtc_state *old_crtc_state, 542 const struct drm_connector_state *old_conn_state) 543 { 544 intel_disable_dp(state, encoder, old_crtc_state, old_conn_state); 545 } 546 547 static void g4x_post_disable_dp(struct intel_atomic_state *state, 548 struct intel_encoder *encoder, 549 const struct intel_crtc_state *old_crtc_state, 550 const struct drm_connector_state *old_conn_state) 551 { 552 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 553 enum port port = encoder->port; 554 555 /* 556 * Bspec does not list a specific disable sequence for g4x DP. 557 * Follow the ilk+ sequence (disable pipe before the port) for 558 * g4x DP as it does not suffer from underruns like the normal 559 * g4x modeset sequence (disable pipe after the port). 560 */ 561 intel_dp_link_down(encoder, old_crtc_state); 562 563 /* Only ilk+ has port A */ 564 if (port == PORT_A) 565 ilk_edp_pll_off(intel_dp, old_crtc_state); 566 } 567 568 static void vlv_post_disable_dp(struct intel_atomic_state *state, 569 struct intel_encoder *encoder, 570 const struct intel_crtc_state *old_crtc_state, 571 const struct drm_connector_state *old_conn_state) 572 { 573 intel_dp_link_down(encoder, old_crtc_state); 574 } 575 576 static void chv_post_disable_dp(struct intel_atomic_state *state, 577 struct intel_encoder *encoder, 578 const struct intel_crtc_state *old_crtc_state, 579 const struct drm_connector_state *old_conn_state) 580 { 581 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 582 583 intel_dp_link_down(encoder, old_crtc_state); 584 585 vlv_dpio_get(dev_priv); 586 587 /* Assert data lane reset */ 588 chv_data_lane_soft_reset(encoder, old_crtc_state, true); 589 590 vlv_dpio_put(dev_priv); 591 } 592 593 static void 594 cpt_set_link_train(struct intel_dp *intel_dp, 595 const struct intel_crtc_state *crtc_state, 596 u8 dp_train_pat) 597 { 598 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); 599 600 intel_dp->DP &= ~DP_LINK_TRAIN_MASK_CPT; 601 602 switch (intel_dp_training_pattern_symbol(dp_train_pat)) { 603 case DP_TRAINING_PATTERN_DISABLE: 604 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; 605 break; 606 case DP_TRAINING_PATTERN_1: 607 intel_dp->DP |= DP_LINK_TRAIN_PAT_1_CPT; 608 break; 609 case DP_TRAINING_PATTERN_2: 610 intel_dp->DP |= DP_LINK_TRAIN_PAT_2_CPT; 611 break; 612 default: 613 MISSING_CASE(intel_dp_training_pattern_symbol(dp_train_pat)); 614 return; 615 } 616 617 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 618 intel_de_posting_read(dev_priv, intel_dp->output_reg); 619 } 620 621 static void 622 g4x_set_link_train(struct intel_dp *intel_dp, 623 const struct intel_crtc_state *crtc_state, 624 u8 dp_train_pat) 625 { 626 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); 627 628 intel_dp->DP &= ~DP_LINK_TRAIN_MASK; 629 630 switch (intel_dp_training_pattern_symbol(dp_train_pat)) { 631 case DP_TRAINING_PATTERN_DISABLE: 632 intel_dp->DP |= DP_LINK_TRAIN_OFF; 633 break; 634 case DP_TRAINING_PATTERN_1: 635 intel_dp->DP |= DP_LINK_TRAIN_PAT_1; 636 break; 637 case DP_TRAINING_PATTERN_2: 638 intel_dp->DP |= DP_LINK_TRAIN_PAT_2; 639 break; 640 default: 641 MISSING_CASE(intel_dp_training_pattern_symbol(dp_train_pat)); 642 return; 643 } 644 645 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 646 intel_de_posting_read(dev_priv, intel_dp->output_reg); 647 } 648 649 static void intel_dp_enable_port(struct intel_dp *intel_dp, 650 const struct intel_crtc_state *crtc_state) 651 { 652 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); 653 654 /* enable with pattern 1 (as per spec) */ 655 656 intel_dp_program_link_training_pattern(intel_dp, crtc_state, 657 DP_PHY_DPRX, DP_TRAINING_PATTERN_1); 658 659 /* 660 * Magic for VLV/CHV. We _must_ first set up the register 661 * without actually enabling the port, and then do another 662 * write to enable the port. Otherwise link training will 663 * fail when the power sequencer is freshly used for this port. 664 */ 665 intel_dp->DP |= DP_PORT_EN; 666 667 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 668 intel_de_posting_read(dev_priv, intel_dp->output_reg); 669 } 670 671 static void intel_enable_dp(struct intel_atomic_state *state, 672 struct intel_encoder *encoder, 673 const struct intel_crtc_state *pipe_config, 674 const struct drm_connector_state *conn_state) 675 { 676 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 677 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 678 u32 dp_reg = intel_de_read(dev_priv, intel_dp->output_reg); 679 intel_wakeref_t wakeref; 680 681 if (drm_WARN_ON(&dev_priv->drm, dp_reg & DP_PORT_EN)) 682 return; 683 684 with_intel_pps_lock(intel_dp, wakeref) { 685 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) 686 vlv_pps_init(encoder, pipe_config); 687 688 intel_dp_enable_port(intel_dp, pipe_config); 689 690 intel_pps_vdd_on_unlocked(intel_dp); 691 intel_pps_on_unlocked(intel_dp); 692 intel_pps_vdd_off_unlocked(intel_dp, true); 693 } 694 695 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 696 unsigned int lane_mask = 0x0; 697 698 if (IS_CHERRYVIEW(dev_priv)) 699 lane_mask = intel_dp_unused_lane_mask(pipe_config->lane_count); 700 701 vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp), 702 lane_mask); 703 } 704 705 intel_dp_set_power(intel_dp, DP_SET_POWER_D0); 706 intel_dp_configure_protocol_converter(intel_dp, pipe_config); 707 intel_dp_check_frl_training(intel_dp); 708 intel_dp_pcon_dsc_configure(intel_dp, pipe_config); 709 intel_dp_start_link_train(intel_dp, pipe_config); 710 intel_dp_stop_link_train(intel_dp, pipe_config); 711 } 712 713 static void g4x_enable_dp(struct intel_atomic_state *state, 714 struct intel_encoder *encoder, 715 const struct intel_crtc_state *pipe_config, 716 const struct drm_connector_state *conn_state) 717 { 718 intel_enable_dp(state, encoder, pipe_config, conn_state); 719 intel_edp_backlight_on(pipe_config, conn_state); 720 encoder->audio_enable(encoder, pipe_config, conn_state); 721 } 722 723 static void vlv_enable_dp(struct intel_atomic_state *state, 724 struct intel_encoder *encoder, 725 const struct intel_crtc_state *pipe_config, 726 const struct drm_connector_state *conn_state) 727 { 728 intel_edp_backlight_on(pipe_config, conn_state); 729 encoder->audio_enable(encoder, pipe_config, conn_state); 730 } 731 732 static void g4x_pre_enable_dp(struct intel_atomic_state *state, 733 struct intel_encoder *encoder, 734 const struct intel_crtc_state *pipe_config, 735 const struct drm_connector_state *conn_state) 736 { 737 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 738 enum port port = encoder->port; 739 740 intel_dp_prepare(encoder, pipe_config); 741 742 /* Only ilk+ has port A */ 743 if (port == PORT_A) 744 ilk_edp_pll_on(intel_dp, pipe_config); 745 } 746 747 static void vlv_pre_enable_dp(struct intel_atomic_state *state, 748 struct intel_encoder *encoder, 749 const struct intel_crtc_state *pipe_config, 750 const struct drm_connector_state *conn_state) 751 { 752 vlv_phy_pre_encoder_enable(encoder, pipe_config); 753 754 intel_enable_dp(state, encoder, pipe_config, conn_state); 755 } 756 757 static void vlv_dp_pre_pll_enable(struct intel_atomic_state *state, 758 struct intel_encoder *encoder, 759 const struct intel_crtc_state *pipe_config, 760 const struct drm_connector_state *conn_state) 761 { 762 intel_dp_prepare(encoder, pipe_config); 763 764 vlv_phy_pre_pll_enable(encoder, pipe_config); 765 } 766 767 static void chv_pre_enable_dp(struct intel_atomic_state *state, 768 struct intel_encoder *encoder, 769 const struct intel_crtc_state *pipe_config, 770 const struct drm_connector_state *conn_state) 771 { 772 chv_phy_pre_encoder_enable(encoder, pipe_config); 773 774 intel_enable_dp(state, encoder, pipe_config, conn_state); 775 776 /* Second common lane will stay alive on its own now */ 777 chv_phy_release_cl2_override(encoder); 778 } 779 780 static void chv_dp_pre_pll_enable(struct intel_atomic_state *state, 781 struct intel_encoder *encoder, 782 const struct intel_crtc_state *pipe_config, 783 const struct drm_connector_state *conn_state) 784 { 785 intel_dp_prepare(encoder, pipe_config); 786 787 chv_phy_pre_pll_enable(encoder, pipe_config); 788 } 789 790 static void chv_dp_post_pll_disable(struct intel_atomic_state *state, 791 struct intel_encoder *encoder, 792 const struct intel_crtc_state *old_crtc_state, 793 const struct drm_connector_state *old_conn_state) 794 { 795 chv_phy_post_pll_disable(encoder, old_crtc_state); 796 } 797 798 static u8 intel_dp_voltage_max_2(struct intel_dp *intel_dp, 799 const struct intel_crtc_state *crtc_state) 800 { 801 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2; 802 } 803 804 static u8 intel_dp_voltage_max_3(struct intel_dp *intel_dp, 805 const struct intel_crtc_state *crtc_state) 806 { 807 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3; 808 } 809 810 static u8 intel_dp_preemph_max_2(struct intel_dp *intel_dp) 811 { 812 return DP_TRAIN_PRE_EMPH_LEVEL_2; 813 } 814 815 static u8 intel_dp_preemph_max_3(struct intel_dp *intel_dp) 816 { 817 return DP_TRAIN_PRE_EMPH_LEVEL_3; 818 } 819 820 static void vlv_set_signal_levels(struct intel_encoder *encoder, 821 const struct intel_crtc_state *crtc_state) 822 { 823 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 824 unsigned long demph_reg_value, preemph_reg_value, 825 uniqtranscale_reg_value; 826 u8 train_set = intel_dp->train_set[0]; 827 828 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { 829 case DP_TRAIN_PRE_EMPH_LEVEL_0: 830 preemph_reg_value = 0x0004000; 831 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 832 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 833 demph_reg_value = 0x2B405555; 834 uniqtranscale_reg_value = 0x552AB83A; 835 break; 836 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 837 demph_reg_value = 0x2B404040; 838 uniqtranscale_reg_value = 0x5548B83A; 839 break; 840 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: 841 demph_reg_value = 0x2B245555; 842 uniqtranscale_reg_value = 0x5560B83A; 843 break; 844 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: 845 demph_reg_value = 0x2B405555; 846 uniqtranscale_reg_value = 0x5598DA3A; 847 break; 848 default: 849 return; 850 } 851 break; 852 case DP_TRAIN_PRE_EMPH_LEVEL_1: 853 preemph_reg_value = 0x0002000; 854 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 855 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 856 demph_reg_value = 0x2B404040; 857 uniqtranscale_reg_value = 0x5552B83A; 858 break; 859 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 860 demph_reg_value = 0x2B404848; 861 uniqtranscale_reg_value = 0x5580B83A; 862 break; 863 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: 864 demph_reg_value = 0x2B404040; 865 uniqtranscale_reg_value = 0x55ADDA3A; 866 break; 867 default: 868 return; 869 } 870 break; 871 case DP_TRAIN_PRE_EMPH_LEVEL_2: 872 preemph_reg_value = 0x0000000; 873 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 874 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 875 demph_reg_value = 0x2B305555; 876 uniqtranscale_reg_value = 0x5570B83A; 877 break; 878 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 879 demph_reg_value = 0x2B2B4040; 880 uniqtranscale_reg_value = 0x55ADDA3A; 881 break; 882 default: 883 return; 884 } 885 break; 886 case DP_TRAIN_PRE_EMPH_LEVEL_3: 887 preemph_reg_value = 0x0006000; 888 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 889 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 890 demph_reg_value = 0x1B405555; 891 uniqtranscale_reg_value = 0x55ADDA3A; 892 break; 893 default: 894 return; 895 } 896 break; 897 default: 898 return; 899 } 900 901 vlv_set_phy_signal_level(encoder, crtc_state, 902 demph_reg_value, preemph_reg_value, 903 uniqtranscale_reg_value, 0); 904 } 905 906 static void chv_set_signal_levels(struct intel_encoder *encoder, 907 const struct intel_crtc_state *crtc_state) 908 { 909 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 910 u32 deemph_reg_value, margin_reg_value; 911 bool uniq_trans_scale = false; 912 u8 train_set = intel_dp->train_set[0]; 913 914 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { 915 case DP_TRAIN_PRE_EMPH_LEVEL_0: 916 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 917 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 918 deemph_reg_value = 128; 919 margin_reg_value = 52; 920 break; 921 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 922 deemph_reg_value = 128; 923 margin_reg_value = 77; 924 break; 925 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: 926 deemph_reg_value = 128; 927 margin_reg_value = 102; 928 break; 929 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: 930 deemph_reg_value = 128; 931 margin_reg_value = 154; 932 uniq_trans_scale = true; 933 break; 934 default: 935 return; 936 } 937 break; 938 case DP_TRAIN_PRE_EMPH_LEVEL_1: 939 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 940 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 941 deemph_reg_value = 85; 942 margin_reg_value = 78; 943 break; 944 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 945 deemph_reg_value = 85; 946 margin_reg_value = 116; 947 break; 948 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: 949 deemph_reg_value = 85; 950 margin_reg_value = 154; 951 break; 952 default: 953 return; 954 } 955 break; 956 case DP_TRAIN_PRE_EMPH_LEVEL_2: 957 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 958 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 959 deemph_reg_value = 64; 960 margin_reg_value = 104; 961 break; 962 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 963 deemph_reg_value = 64; 964 margin_reg_value = 154; 965 break; 966 default: 967 return; 968 } 969 break; 970 case DP_TRAIN_PRE_EMPH_LEVEL_3: 971 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 972 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 973 deemph_reg_value = 43; 974 margin_reg_value = 154; 975 break; 976 default: 977 return; 978 } 979 break; 980 default: 981 return; 982 } 983 984 chv_set_phy_signal_level(encoder, crtc_state, 985 deemph_reg_value, margin_reg_value, 986 uniq_trans_scale); 987 } 988 989 static u32 g4x_signal_levels(u8 train_set) 990 { 991 u32 signal_levels = 0; 992 993 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { 994 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0: 995 default: 996 signal_levels |= DP_VOLTAGE_0_4; 997 break; 998 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1: 999 signal_levels |= DP_VOLTAGE_0_6; 1000 break; 1001 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2: 1002 signal_levels |= DP_VOLTAGE_0_8; 1003 break; 1004 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3: 1005 signal_levels |= DP_VOLTAGE_1_2; 1006 break; 1007 } 1008 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { 1009 case DP_TRAIN_PRE_EMPH_LEVEL_0: 1010 default: 1011 signal_levels |= DP_PRE_EMPHASIS_0; 1012 break; 1013 case DP_TRAIN_PRE_EMPH_LEVEL_1: 1014 signal_levels |= DP_PRE_EMPHASIS_3_5; 1015 break; 1016 case DP_TRAIN_PRE_EMPH_LEVEL_2: 1017 signal_levels |= DP_PRE_EMPHASIS_6; 1018 break; 1019 case DP_TRAIN_PRE_EMPH_LEVEL_3: 1020 signal_levels |= DP_PRE_EMPHASIS_9_5; 1021 break; 1022 } 1023 return signal_levels; 1024 } 1025 1026 static void 1027 g4x_set_signal_levels(struct intel_encoder *encoder, 1028 const struct intel_crtc_state *crtc_state) 1029 { 1030 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1031 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 1032 u8 train_set = intel_dp->train_set[0]; 1033 u32 signal_levels; 1034 1035 signal_levels = g4x_signal_levels(train_set); 1036 1037 drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n", 1038 signal_levels); 1039 1040 intel_dp->DP &= ~(DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK); 1041 intel_dp->DP |= signal_levels; 1042 1043 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 1044 intel_de_posting_read(dev_priv, intel_dp->output_reg); 1045 } 1046 1047 /* SNB CPU eDP voltage swing and pre-emphasis control */ 1048 static u32 snb_cpu_edp_signal_levels(u8 train_set) 1049 { 1050 u8 signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | 1051 DP_TRAIN_PRE_EMPHASIS_MASK); 1052 1053 switch (signal_levels) { 1054 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1055 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1056 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; 1057 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1: 1058 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; 1059 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2: 1060 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2: 1061 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; 1062 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1: 1063 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1: 1064 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; 1065 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1066 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1067 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; 1068 default: 1069 MISSING_CASE(signal_levels); 1070 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; 1071 } 1072 } 1073 1074 static void 1075 snb_cpu_edp_set_signal_levels(struct intel_encoder *encoder, 1076 const struct intel_crtc_state *crtc_state) 1077 { 1078 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1079 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 1080 u8 train_set = intel_dp->train_set[0]; 1081 u32 signal_levels; 1082 1083 signal_levels = snb_cpu_edp_signal_levels(train_set); 1084 1085 drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n", 1086 signal_levels); 1087 1088 intel_dp->DP &= ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB; 1089 intel_dp->DP |= signal_levels; 1090 1091 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 1092 intel_de_posting_read(dev_priv, intel_dp->output_reg); 1093 } 1094 1095 /* IVB CPU eDP voltage swing and pre-emphasis control */ 1096 static u32 ivb_cpu_edp_signal_levels(u8 train_set) 1097 { 1098 u8 signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | 1099 DP_TRAIN_PRE_EMPHASIS_MASK); 1100 1101 switch (signal_levels) { 1102 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1103 return EDP_LINK_TRAIN_400MV_0DB_IVB; 1104 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1: 1105 return EDP_LINK_TRAIN_400MV_3_5DB_IVB; 1106 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2: 1107 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2: 1108 return EDP_LINK_TRAIN_400MV_6DB_IVB; 1109 1110 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1111 return EDP_LINK_TRAIN_600MV_0DB_IVB; 1112 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1: 1113 return EDP_LINK_TRAIN_600MV_3_5DB_IVB; 1114 1115 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0: 1116 return EDP_LINK_TRAIN_800MV_0DB_IVB; 1117 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1: 1118 return EDP_LINK_TRAIN_800MV_3_5DB_IVB; 1119 1120 default: 1121 MISSING_CASE(signal_levels); 1122 return EDP_LINK_TRAIN_500MV_0DB_IVB; 1123 } 1124 } 1125 1126 static void 1127 ivb_cpu_edp_set_signal_levels(struct intel_encoder *encoder, 1128 const struct intel_crtc_state *crtc_state) 1129 { 1130 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1131 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 1132 u8 train_set = intel_dp->train_set[0]; 1133 u32 signal_levels; 1134 1135 signal_levels = ivb_cpu_edp_signal_levels(train_set); 1136 1137 drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n", 1138 signal_levels); 1139 1140 intel_dp->DP &= ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB; 1141 intel_dp->DP |= signal_levels; 1142 1143 intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP); 1144 intel_de_posting_read(dev_priv, intel_dp->output_reg); 1145 } 1146 1147 /* 1148 * If display is now connected check links status, 1149 * there has been known issues of link loss triggering 1150 * long pulse. 1151 * 1152 * Some sinks (eg. ASUS PB287Q) seem to perform some 1153 * weird HPD ping pong during modesets. So we can apparently 1154 * end up with HPD going low during a modeset, and then 1155 * going back up soon after. And once that happens we must 1156 * retrain the link to get a picture. That's in case no 1157 * userspace component reacted to intermittent HPD dip. 1158 */ 1159 static enum intel_hotplug_state 1160 intel_dp_hotplug(struct intel_encoder *encoder, 1161 struct intel_connector *connector) 1162 { 1163 struct intel_dp *intel_dp = enc_to_intel_dp(encoder); 1164 struct drm_modeset_acquire_ctx ctx; 1165 enum intel_hotplug_state state; 1166 int ret; 1167 1168 if (intel_dp->compliance.test_active && 1169 intel_dp->compliance.test_type == DP_TEST_LINK_PHY_TEST_PATTERN) { 1170 intel_dp_phy_test(encoder); 1171 /* just do the PHY test and nothing else */ 1172 return INTEL_HOTPLUG_UNCHANGED; 1173 } 1174 1175 state = intel_encoder_hotplug(encoder, connector); 1176 1177 drm_modeset_acquire_init(&ctx, 0); 1178 1179 for (;;) { 1180 ret = intel_dp_retrain_link(encoder, &ctx); 1181 1182 if (ret == -EDEADLK) { 1183 drm_modeset_backoff(&ctx); 1184 continue; 1185 } 1186 1187 break; 1188 } 1189 1190 drm_modeset_drop_locks(&ctx); 1191 drm_modeset_acquire_fini(&ctx); 1192 drm_WARN(encoder->base.dev, ret, 1193 "Acquiring modeset locks failed with %i\n", ret); 1194 1195 /* 1196 * Keeping it consistent with intel_ddi_hotplug() and 1197 * intel_hdmi_hotplug(). 1198 */ 1199 if (state == INTEL_HOTPLUG_UNCHANGED && !connector->hotplug_retries) 1200 state = INTEL_HOTPLUG_RETRY; 1201 1202 return state; 1203 } 1204 1205 static bool ibx_digital_port_connected(struct intel_encoder *encoder) 1206 { 1207 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1208 u32 bit = dev_priv->display.hotplug.pch_hpd[encoder->hpd_pin]; 1209 1210 return intel_de_read(dev_priv, SDEISR) & bit; 1211 } 1212 1213 static bool g4x_digital_port_connected(struct intel_encoder *encoder) 1214 { 1215 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1216 u32 bit; 1217 1218 switch (encoder->hpd_pin) { 1219 case HPD_PORT_B: 1220 bit = PORTB_HOTPLUG_LIVE_STATUS_G4X; 1221 break; 1222 case HPD_PORT_C: 1223 bit = PORTC_HOTPLUG_LIVE_STATUS_G4X; 1224 break; 1225 case HPD_PORT_D: 1226 bit = PORTD_HOTPLUG_LIVE_STATUS_G4X; 1227 break; 1228 default: 1229 MISSING_CASE(encoder->hpd_pin); 1230 return false; 1231 } 1232 1233 return intel_de_read(dev_priv, PORT_HOTPLUG_STAT) & bit; 1234 } 1235 1236 static bool ilk_digital_port_connected(struct intel_encoder *encoder) 1237 { 1238 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1239 u32 bit = dev_priv->display.hotplug.hpd[encoder->hpd_pin]; 1240 1241 return intel_de_read(dev_priv, DEISR) & bit; 1242 } 1243 1244 static void intel_dp_encoder_destroy(struct drm_encoder *encoder) 1245 { 1246 intel_dp_encoder_flush_work(encoder); 1247 1248 drm_encoder_cleanup(encoder); 1249 kfree(enc_to_dig_port(to_intel_encoder(encoder))); 1250 } 1251 1252 enum pipe vlv_active_pipe(struct intel_dp *intel_dp) 1253 { 1254 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); 1255 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; 1256 enum pipe pipe; 1257 1258 if (g4x_dp_port_enabled(dev_priv, intel_dp->output_reg, 1259 encoder->port, &pipe)) 1260 return pipe; 1261 1262 return INVALID_PIPE; 1263 } 1264 1265 static void intel_dp_encoder_reset(struct drm_encoder *encoder) 1266 { 1267 struct drm_i915_private *dev_priv = to_i915(encoder->dev); 1268 struct intel_dp *intel_dp = enc_to_intel_dp(to_intel_encoder(encoder)); 1269 1270 intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg); 1271 1272 intel_dp->reset_link_params = true; 1273 1274 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { 1275 intel_wakeref_t wakeref; 1276 1277 with_intel_pps_lock(intel_dp, wakeref) 1278 intel_dp->pps.active_pipe = vlv_active_pipe(intel_dp); 1279 } 1280 1281 intel_pps_encoder_reset(intel_dp); 1282 } 1283 1284 static const struct drm_encoder_funcs intel_dp_enc_funcs = { 1285 .reset = intel_dp_encoder_reset, 1286 .destroy = intel_dp_encoder_destroy, 1287 }; 1288 1289 bool g4x_dp_init(struct drm_i915_private *dev_priv, 1290 i915_reg_t output_reg, enum port port) 1291 { 1292 const struct intel_bios_encoder_data *devdata; 1293 struct intel_digital_port *dig_port; 1294 struct intel_encoder *intel_encoder; 1295 struct drm_encoder *encoder; 1296 struct intel_connector *intel_connector; 1297 1298 if (!assert_port_valid(dev_priv, port)) 1299 return false; 1300 1301 devdata = intel_bios_encoder_data_lookup(dev_priv, port); 1302 1303 /* FIXME bail? */ 1304 if (!devdata) 1305 drm_dbg_kms(&dev_priv->drm, "No VBT child device for DP-%c\n", 1306 port_name(port)); 1307 1308 dig_port = kzalloc(sizeof(*dig_port), GFP_KERNEL); 1309 if (!dig_port) 1310 return false; 1311 1312 dig_port->aux_ch = AUX_CH_NONE; 1313 1314 intel_connector = intel_connector_alloc(); 1315 if (!intel_connector) 1316 goto err_connector_alloc; 1317 1318 intel_encoder = &dig_port->base; 1319 encoder = &intel_encoder->base; 1320 1321 intel_encoder->devdata = devdata; 1322 1323 mutex_init(&dig_port->hdcp_mutex); 1324 1325 if (drm_encoder_init(&dev_priv->drm, &intel_encoder->base, 1326 &intel_dp_enc_funcs, DRM_MODE_ENCODER_TMDS, 1327 "DP %c", port_name(port))) 1328 goto err_encoder_init; 1329 1330 intel_encoder->hotplug = intel_dp_hotplug; 1331 intel_encoder->compute_config = intel_dp_compute_config; 1332 intel_encoder->get_hw_state = intel_dp_get_hw_state; 1333 intel_encoder->get_config = intel_dp_get_config; 1334 intel_encoder->sync_state = intel_dp_sync_state; 1335 intel_encoder->initial_fastset_check = intel_dp_initial_fastset_check; 1336 intel_encoder->update_pipe = intel_backlight_update; 1337 intel_encoder->suspend = intel_dp_encoder_suspend; 1338 intel_encoder->shutdown = intel_dp_encoder_shutdown; 1339 if (IS_CHERRYVIEW(dev_priv)) { 1340 intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable; 1341 intel_encoder->pre_enable = chv_pre_enable_dp; 1342 intel_encoder->enable = vlv_enable_dp; 1343 intel_encoder->disable = vlv_disable_dp; 1344 intel_encoder->post_disable = chv_post_disable_dp; 1345 intel_encoder->post_pll_disable = chv_dp_post_pll_disable; 1346 } else if (IS_VALLEYVIEW(dev_priv)) { 1347 intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable; 1348 intel_encoder->pre_enable = vlv_pre_enable_dp; 1349 intel_encoder->enable = vlv_enable_dp; 1350 intel_encoder->disable = vlv_disable_dp; 1351 intel_encoder->post_disable = vlv_post_disable_dp; 1352 } else { 1353 intel_encoder->pre_enable = g4x_pre_enable_dp; 1354 intel_encoder->enable = g4x_enable_dp; 1355 intel_encoder->disable = g4x_disable_dp; 1356 intel_encoder->post_disable = g4x_post_disable_dp; 1357 } 1358 intel_encoder->audio_enable = g4x_dp_audio_enable; 1359 intel_encoder->audio_disable = g4x_dp_audio_disable; 1360 1361 if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) || 1362 (HAS_PCH_CPT(dev_priv) && port != PORT_A)) 1363 dig_port->dp.set_link_train = cpt_set_link_train; 1364 else 1365 dig_port->dp.set_link_train = g4x_set_link_train; 1366 1367 if (IS_CHERRYVIEW(dev_priv)) 1368 intel_encoder->set_signal_levels = chv_set_signal_levels; 1369 else if (IS_VALLEYVIEW(dev_priv)) 1370 intel_encoder->set_signal_levels = vlv_set_signal_levels; 1371 else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) 1372 intel_encoder->set_signal_levels = ivb_cpu_edp_set_signal_levels; 1373 else if (IS_SANDYBRIDGE(dev_priv) && port == PORT_A) 1374 intel_encoder->set_signal_levels = snb_cpu_edp_set_signal_levels; 1375 else 1376 intel_encoder->set_signal_levels = g4x_set_signal_levels; 1377 1378 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) || 1379 (HAS_PCH_SPLIT(dev_priv) && port != PORT_A)) { 1380 dig_port->dp.preemph_max = intel_dp_preemph_max_3; 1381 dig_port->dp.voltage_max = intel_dp_voltage_max_3; 1382 } else { 1383 dig_port->dp.preemph_max = intel_dp_preemph_max_2; 1384 dig_port->dp.voltage_max = intel_dp_voltage_max_2; 1385 } 1386 1387 dig_port->dp.output_reg = output_reg; 1388 dig_port->max_lanes = 4; 1389 1390 intel_encoder->type = INTEL_OUTPUT_DP; 1391 intel_encoder->power_domain = intel_display_power_ddi_lanes_domain(dev_priv, port); 1392 if (IS_CHERRYVIEW(dev_priv)) { 1393 if (port == PORT_D) 1394 intel_encoder->pipe_mask = BIT(PIPE_C); 1395 else 1396 intel_encoder->pipe_mask = BIT(PIPE_A) | BIT(PIPE_B); 1397 } else { 1398 intel_encoder->pipe_mask = ~0; 1399 } 1400 intel_encoder->cloneable = 0; 1401 intel_encoder->port = port; 1402 intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port); 1403 1404 dig_port->hpd_pulse = intel_dp_hpd_pulse; 1405 1406 if (HAS_GMCH(dev_priv)) { 1407 dig_port->connected = g4x_digital_port_connected; 1408 } else { 1409 if (port == PORT_A) 1410 dig_port->connected = ilk_digital_port_connected; 1411 else 1412 dig_port->connected = ibx_digital_port_connected; 1413 } 1414 1415 if (port != PORT_A) 1416 intel_infoframe_init(dig_port); 1417 1418 dig_port->aux_ch = intel_dp_aux_ch(intel_encoder); 1419 if (dig_port->aux_ch == AUX_CH_NONE) 1420 goto err_init_connector; 1421 1422 if (!intel_dp_init_connector(dig_port, intel_connector)) 1423 goto err_init_connector; 1424 1425 return true; 1426 1427 err_init_connector: 1428 drm_encoder_cleanup(encoder); 1429 err_encoder_init: 1430 kfree(intel_connector); 1431 err_connector_alloc: 1432 kfree(dig_port); 1433 return false; 1434 } 1435