1 /* 2 * Copyright © 2006-2007 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 * Authors: 24 * Eric Anholt <eric@anholt.net> 25 */ 26 27 #include <linux/dmi.h> 28 #include <linux/i2c.h> 29 #include <linux/slab.h> 30 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_crtc.h> 33 #include <drm/drm_edid.h> 34 #include <drm/drm_probe_helper.h> 35 36 #include "i915_drv.h" 37 #include "i915_irq.h" 38 #include "i915_reg.h" 39 #include "intel_connector.h" 40 #include "intel_crt.h" 41 #include "intel_crtc.h" 42 #include "intel_ddi.h" 43 #include "intel_ddi_buf_trans.h" 44 #include "intel_de.h" 45 #include "intel_display_driver.h" 46 #include "intel_display_types.h" 47 #include "intel_fdi.h" 48 #include "intel_fdi_regs.h" 49 #include "intel_fifo_underrun.h" 50 #include "intel_gmbus.h" 51 #include "intel_hotplug.h" 52 #include "intel_hotplug_irq.h" 53 #include "intel_load_detect.h" 54 #include "intel_pch_display.h" 55 #include "intel_pch_refclk.h" 56 57 /* Here's the desired hotplug mode */ 58 #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \ 59 ADPA_CRT_HOTPLUG_WARMUP_10MS | \ 60 ADPA_CRT_HOTPLUG_SAMPLE_4S | \ 61 ADPA_CRT_HOTPLUG_VOLTAGE_50 | \ 62 ADPA_CRT_HOTPLUG_VOLREF_325MV | \ 63 ADPA_CRT_HOTPLUG_ENABLE) 64 65 struct intel_crt { 66 struct intel_encoder base; 67 /* DPMS state is stored in the connector, which we need in the 68 * encoder's enable/disable callbacks */ 69 struct intel_connector *connector; 70 bool force_hotplug_required; 71 i915_reg_t adpa_reg; 72 }; 73 74 static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder) 75 { 76 return container_of(encoder, struct intel_crt, base); 77 } 78 79 static struct intel_crt *intel_attached_crt(struct intel_connector *connector) 80 { 81 return intel_encoder_to_crt(intel_attached_encoder(connector)); 82 } 83 84 bool intel_crt_port_enabled(struct drm_i915_private *dev_priv, 85 i915_reg_t adpa_reg, enum pipe *pipe) 86 { 87 u32 val; 88 89 val = intel_de_read(dev_priv, adpa_reg); 90 91 /* asserts want to know the pipe even if the port is disabled */ 92 if (HAS_PCH_CPT(dev_priv)) 93 *pipe = (val & ADPA_PIPE_SEL_MASK_CPT) >> ADPA_PIPE_SEL_SHIFT_CPT; 94 else 95 *pipe = (val & ADPA_PIPE_SEL_MASK) >> ADPA_PIPE_SEL_SHIFT; 96 97 return val & ADPA_DAC_ENABLE; 98 } 99 100 static bool intel_crt_get_hw_state(struct intel_encoder *encoder, 101 enum pipe *pipe) 102 { 103 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 104 struct intel_crt *crt = intel_encoder_to_crt(encoder); 105 intel_wakeref_t wakeref; 106 bool ret; 107 108 wakeref = intel_display_power_get_if_enabled(dev_priv, 109 encoder->power_domain); 110 if (!wakeref) 111 return false; 112 113 ret = intel_crt_port_enabled(dev_priv, crt->adpa_reg, pipe); 114 115 intel_display_power_put(dev_priv, encoder->power_domain, wakeref); 116 117 return ret; 118 } 119 120 static unsigned int intel_crt_get_flags(struct intel_encoder *encoder) 121 { 122 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 123 struct intel_crt *crt = intel_encoder_to_crt(encoder); 124 u32 tmp, flags = 0; 125 126 tmp = intel_de_read(dev_priv, crt->adpa_reg); 127 128 if (tmp & ADPA_HSYNC_ACTIVE_HIGH) 129 flags |= DRM_MODE_FLAG_PHSYNC; 130 else 131 flags |= DRM_MODE_FLAG_NHSYNC; 132 133 if (tmp & ADPA_VSYNC_ACTIVE_HIGH) 134 flags |= DRM_MODE_FLAG_PVSYNC; 135 else 136 flags |= DRM_MODE_FLAG_NVSYNC; 137 138 return flags; 139 } 140 141 static void intel_crt_get_config(struct intel_encoder *encoder, 142 struct intel_crtc_state *pipe_config) 143 { 144 pipe_config->output_types |= BIT(INTEL_OUTPUT_ANALOG); 145 146 pipe_config->hw.adjusted_mode.flags |= intel_crt_get_flags(encoder); 147 148 pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock; 149 } 150 151 static void hsw_crt_get_config(struct intel_encoder *encoder, 152 struct intel_crtc_state *pipe_config) 153 { 154 lpt_pch_get_config(pipe_config); 155 156 hsw_ddi_get_config(encoder, pipe_config); 157 158 pipe_config->hw.adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC | 159 DRM_MODE_FLAG_NHSYNC | 160 DRM_MODE_FLAG_PVSYNC | 161 DRM_MODE_FLAG_NVSYNC); 162 pipe_config->hw.adjusted_mode.flags |= intel_crt_get_flags(encoder); 163 } 164 165 /* Note: The caller is required to filter out dpms modes not supported by the 166 * platform. */ 167 static void intel_crt_set_dpms(struct intel_encoder *encoder, 168 const struct intel_crtc_state *crtc_state, 169 int mode) 170 { 171 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 172 struct intel_crt *crt = intel_encoder_to_crt(encoder); 173 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); 174 const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; 175 u32 adpa; 176 177 if (DISPLAY_VER(dev_priv) >= 5) 178 adpa = ADPA_HOTPLUG_BITS; 179 else 180 adpa = 0; 181 182 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 183 adpa |= ADPA_HSYNC_ACTIVE_HIGH; 184 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 185 adpa |= ADPA_VSYNC_ACTIVE_HIGH; 186 187 /* For CPT allow 3 pipe config, for others just use A or B */ 188 if (HAS_PCH_LPT(dev_priv)) 189 ; /* Those bits don't exist here */ 190 else if (HAS_PCH_CPT(dev_priv)) 191 adpa |= ADPA_PIPE_SEL_CPT(crtc->pipe); 192 else 193 adpa |= ADPA_PIPE_SEL(crtc->pipe); 194 195 if (!HAS_PCH_SPLIT(dev_priv)) 196 intel_de_write(dev_priv, BCLRPAT(crtc->pipe), 0); 197 198 switch (mode) { 199 case DRM_MODE_DPMS_ON: 200 adpa |= ADPA_DAC_ENABLE; 201 break; 202 case DRM_MODE_DPMS_STANDBY: 203 adpa |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; 204 break; 205 case DRM_MODE_DPMS_SUSPEND: 206 adpa |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; 207 break; 208 case DRM_MODE_DPMS_OFF: 209 adpa |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; 210 break; 211 } 212 213 intel_de_write(dev_priv, crt->adpa_reg, adpa); 214 } 215 216 static void intel_disable_crt(struct intel_atomic_state *state, 217 struct intel_encoder *encoder, 218 const struct intel_crtc_state *old_crtc_state, 219 const struct drm_connector_state *old_conn_state) 220 { 221 intel_crt_set_dpms(encoder, old_crtc_state, DRM_MODE_DPMS_OFF); 222 } 223 224 static void pch_disable_crt(struct intel_atomic_state *state, 225 struct intel_encoder *encoder, 226 const struct intel_crtc_state *old_crtc_state, 227 const struct drm_connector_state *old_conn_state) 228 { 229 } 230 231 static void pch_post_disable_crt(struct intel_atomic_state *state, 232 struct intel_encoder *encoder, 233 const struct intel_crtc_state *old_crtc_state, 234 const struct drm_connector_state *old_conn_state) 235 { 236 intel_disable_crt(state, encoder, old_crtc_state, old_conn_state); 237 } 238 239 static void hsw_disable_crt(struct intel_atomic_state *state, 240 struct intel_encoder *encoder, 241 const struct intel_crtc_state *old_crtc_state, 242 const struct drm_connector_state *old_conn_state) 243 { 244 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 245 246 drm_WARN_ON(&dev_priv->drm, !old_crtc_state->has_pch_encoder); 247 248 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false); 249 } 250 251 static void hsw_post_disable_crt(struct intel_atomic_state *state, 252 struct intel_encoder *encoder, 253 const struct intel_crtc_state *old_crtc_state, 254 const struct drm_connector_state *old_conn_state) 255 { 256 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc); 257 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 258 259 intel_crtc_vblank_off(old_crtc_state); 260 261 intel_disable_transcoder(old_crtc_state); 262 263 intel_ddi_disable_transcoder_func(old_crtc_state); 264 265 ilk_pfit_disable(old_crtc_state); 266 267 intel_ddi_disable_transcoder_clock(old_crtc_state); 268 269 pch_post_disable_crt(state, encoder, old_crtc_state, old_conn_state); 270 271 lpt_pch_disable(state, crtc); 272 273 hsw_fdi_disable(encoder); 274 275 drm_WARN_ON(&dev_priv->drm, !old_crtc_state->has_pch_encoder); 276 277 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true); 278 } 279 280 static void hsw_pre_pll_enable_crt(struct intel_atomic_state *state, 281 struct intel_encoder *encoder, 282 const struct intel_crtc_state *crtc_state, 283 const struct drm_connector_state *conn_state) 284 { 285 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 286 287 drm_WARN_ON(&dev_priv->drm, !crtc_state->has_pch_encoder); 288 289 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false); 290 } 291 292 static void hsw_pre_enable_crt(struct intel_atomic_state *state, 293 struct intel_encoder *encoder, 294 const struct intel_crtc_state *crtc_state, 295 const struct drm_connector_state *conn_state) 296 { 297 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 298 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); 299 enum pipe pipe = crtc->pipe; 300 301 drm_WARN_ON(&dev_priv->drm, !crtc_state->has_pch_encoder); 302 303 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false); 304 305 hsw_fdi_link_train(encoder, crtc_state); 306 307 intel_ddi_enable_transcoder_clock(encoder, crtc_state); 308 } 309 310 static void hsw_enable_crt(struct intel_atomic_state *state, 311 struct intel_encoder *encoder, 312 const struct intel_crtc_state *crtc_state, 313 const struct drm_connector_state *conn_state) 314 { 315 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 316 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); 317 enum pipe pipe = crtc->pipe; 318 319 drm_WARN_ON(&dev_priv->drm, !crtc_state->has_pch_encoder); 320 321 intel_ddi_enable_transcoder_func(encoder, crtc_state); 322 323 intel_enable_transcoder(crtc_state); 324 325 lpt_pch_enable(state, crtc); 326 327 intel_crtc_vblank_on(crtc_state); 328 329 intel_crt_set_dpms(encoder, crtc_state, DRM_MODE_DPMS_ON); 330 331 intel_crtc_wait_for_next_vblank(crtc); 332 intel_crtc_wait_for_next_vblank(crtc); 333 intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true); 334 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true); 335 } 336 337 static void intel_enable_crt(struct intel_atomic_state *state, 338 struct intel_encoder *encoder, 339 const struct intel_crtc_state *crtc_state, 340 const struct drm_connector_state *conn_state) 341 { 342 intel_crt_set_dpms(encoder, crtc_state, DRM_MODE_DPMS_ON); 343 } 344 345 static enum drm_mode_status 346 intel_crt_mode_valid(struct drm_connector *connector, 347 struct drm_display_mode *mode) 348 { 349 struct drm_device *dev = connector->dev; 350 struct drm_i915_private *dev_priv = to_i915(dev); 351 int max_dotclk = dev_priv->max_dotclk_freq; 352 enum drm_mode_status status; 353 int max_clock; 354 355 status = intel_cpu_transcoder_mode_valid(dev_priv, mode); 356 if (status != MODE_OK) 357 return status; 358 359 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 360 return MODE_NO_DBLESCAN; 361 362 if (mode->clock < 25000) 363 return MODE_CLOCK_LOW; 364 365 if (HAS_PCH_LPT(dev_priv)) 366 max_clock = 180000; 367 else if (IS_VALLEYVIEW(dev_priv)) 368 /* 369 * 270 MHz due to current DPLL limits, 370 * DAC limit supposedly 355 MHz. 371 */ 372 max_clock = 270000; 373 else if (IS_DISPLAY_VER(dev_priv, 3, 4)) 374 max_clock = 400000; 375 else 376 max_clock = 350000; 377 if (mode->clock > max_clock) 378 return MODE_CLOCK_HIGH; 379 380 if (mode->clock > max_dotclk) 381 return MODE_CLOCK_HIGH; 382 383 /* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */ 384 if (HAS_PCH_LPT(dev_priv) && 385 ilk_get_lanes_required(mode->clock, 270000, 24) > 2) 386 return MODE_CLOCK_HIGH; 387 388 /* HSW/BDW FDI limited to 4k */ 389 if (mode->hdisplay > 4096) 390 return MODE_H_ILLEGAL; 391 392 return MODE_OK; 393 } 394 395 static int intel_crt_compute_config(struct intel_encoder *encoder, 396 struct intel_crtc_state *pipe_config, 397 struct drm_connector_state *conn_state) 398 { 399 struct drm_display_mode *adjusted_mode = 400 &pipe_config->hw.adjusted_mode; 401 402 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 403 return -EINVAL; 404 405 pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB; 406 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 407 408 return 0; 409 } 410 411 static int pch_crt_compute_config(struct intel_encoder *encoder, 412 struct intel_crtc_state *pipe_config, 413 struct drm_connector_state *conn_state) 414 { 415 struct drm_display_mode *adjusted_mode = 416 &pipe_config->hw.adjusted_mode; 417 418 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 419 return -EINVAL; 420 421 pipe_config->has_pch_encoder = true; 422 if (!intel_fdi_compute_pipe_bpp(pipe_config)) 423 return -EINVAL; 424 425 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 426 427 return 0; 428 } 429 430 static int hsw_crt_compute_config(struct intel_encoder *encoder, 431 struct intel_crtc_state *pipe_config, 432 struct drm_connector_state *conn_state) 433 { 434 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 435 struct drm_display_mode *adjusted_mode = 436 &pipe_config->hw.adjusted_mode; 437 438 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) 439 return -EINVAL; 440 441 /* HSW/BDW FDI limited to 4k */ 442 if (adjusted_mode->crtc_hdisplay > 4096 || 443 adjusted_mode->crtc_hblank_start > 4096) 444 return -EINVAL; 445 446 pipe_config->has_pch_encoder = true; 447 if (!intel_fdi_compute_pipe_bpp(pipe_config)) 448 return -EINVAL; 449 450 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; 451 452 /* LPT FDI RX only supports 8bpc. */ 453 if (HAS_PCH_LPT(dev_priv)) { 454 /* TODO: Check crtc_state->max_link_bpp_x16 instead of bw_constrained */ 455 if (pipe_config->bw_constrained && pipe_config->pipe_bpp < 24) { 456 drm_dbg_kms(&dev_priv->drm, 457 "LPT only supports 24bpp\n"); 458 return -EINVAL; 459 } 460 461 pipe_config->pipe_bpp = 24; 462 } 463 464 /* FDI must always be 2.7 GHz */ 465 pipe_config->port_clock = 135000 * 2; 466 467 pipe_config->enhanced_framing = true; 468 469 adjusted_mode->crtc_clock = lpt_iclkip(pipe_config); 470 471 return 0; 472 } 473 474 static bool ilk_crt_detect_hotplug(struct drm_connector *connector) 475 { 476 struct drm_device *dev = connector->dev; 477 struct intel_crt *crt = intel_attached_crt(to_intel_connector(connector)); 478 struct drm_i915_private *dev_priv = to_i915(dev); 479 u32 adpa; 480 bool ret; 481 482 /* The first time through, trigger an explicit detection cycle */ 483 if (crt->force_hotplug_required) { 484 bool turn_off_dac = HAS_PCH_SPLIT(dev_priv); 485 u32 save_adpa; 486 487 crt->force_hotplug_required = false; 488 489 save_adpa = adpa = intel_de_read(dev_priv, crt->adpa_reg); 490 drm_dbg_kms(&dev_priv->drm, 491 "trigger hotplug detect cycle: adpa=0x%x\n", adpa); 492 493 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; 494 if (turn_off_dac) 495 adpa &= ~ADPA_DAC_ENABLE; 496 497 intel_de_write(dev_priv, crt->adpa_reg, adpa); 498 499 if (intel_de_wait_for_clear(dev_priv, 500 crt->adpa_reg, 501 ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 502 1000)) 503 drm_dbg_kms(&dev_priv->drm, 504 "timed out waiting for FORCE_TRIGGER"); 505 506 if (turn_off_dac) { 507 intel_de_write(dev_priv, crt->adpa_reg, save_adpa); 508 intel_de_posting_read(dev_priv, crt->adpa_reg); 509 } 510 } 511 512 /* Check the status to see if both blue and green are on now */ 513 adpa = intel_de_read(dev_priv, crt->adpa_reg); 514 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) 515 ret = true; 516 else 517 ret = false; 518 drm_dbg_kms(&dev_priv->drm, "ironlake hotplug adpa=0x%x, result %d\n", 519 adpa, ret); 520 521 return ret; 522 } 523 524 static bool valleyview_crt_detect_hotplug(struct drm_connector *connector) 525 { 526 struct drm_device *dev = connector->dev; 527 struct intel_crt *crt = intel_attached_crt(to_intel_connector(connector)); 528 struct drm_i915_private *dev_priv = to_i915(dev); 529 bool reenable_hpd; 530 u32 adpa; 531 bool ret; 532 u32 save_adpa; 533 534 /* 535 * Doing a force trigger causes a hpd interrupt to get sent, which can 536 * get us stuck in a loop if we're polling: 537 * - We enable power wells and reset the ADPA 538 * - output_poll_exec does force probe on VGA, triggering a hpd 539 * - HPD handler waits for poll to unlock dev->mode_config.mutex 540 * - output_poll_exec shuts off the ADPA, unlocks 541 * dev->mode_config.mutex 542 * - HPD handler runs, resets ADPA and brings us back to the start 543 * 544 * Just disable HPD interrupts here to prevent this 545 */ 546 reenable_hpd = intel_hpd_disable(dev_priv, crt->base.hpd_pin); 547 548 save_adpa = adpa = intel_de_read(dev_priv, crt->adpa_reg); 549 drm_dbg_kms(&dev_priv->drm, 550 "trigger hotplug detect cycle: adpa=0x%x\n", adpa); 551 552 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; 553 554 intel_de_write(dev_priv, crt->adpa_reg, adpa); 555 556 if (intel_de_wait_for_clear(dev_priv, crt->adpa_reg, 557 ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 1000)) { 558 drm_dbg_kms(&dev_priv->drm, 559 "timed out waiting for FORCE_TRIGGER"); 560 intel_de_write(dev_priv, crt->adpa_reg, save_adpa); 561 } 562 563 /* Check the status to see if both blue and green are on now */ 564 adpa = intel_de_read(dev_priv, crt->adpa_reg); 565 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) 566 ret = true; 567 else 568 ret = false; 569 570 drm_dbg_kms(&dev_priv->drm, 571 "valleyview hotplug adpa=0x%x, result %d\n", adpa, ret); 572 573 if (reenable_hpd) 574 intel_hpd_enable(dev_priv, crt->base.hpd_pin); 575 576 return ret; 577 } 578 579 static bool intel_crt_detect_hotplug(struct drm_connector *connector) 580 { 581 struct drm_device *dev = connector->dev; 582 struct drm_i915_private *dev_priv = to_i915(dev); 583 u32 stat; 584 bool ret = false; 585 int i, tries = 0; 586 587 if (HAS_PCH_SPLIT(dev_priv)) 588 return ilk_crt_detect_hotplug(connector); 589 590 if (IS_VALLEYVIEW(dev_priv)) 591 return valleyview_crt_detect_hotplug(connector); 592 593 /* 594 * On 4 series desktop, CRT detect sequence need to be done twice 595 * to get a reliable result. 596 */ 597 598 if (IS_G45(dev_priv)) 599 tries = 2; 600 else 601 tries = 1; 602 603 for (i = 0; i < tries ; i++) { 604 /* turn on the FORCE_DETECT */ 605 i915_hotplug_interrupt_update(dev_priv, 606 CRT_HOTPLUG_FORCE_DETECT, 607 CRT_HOTPLUG_FORCE_DETECT); 608 /* wait for FORCE_DETECT to go off */ 609 if (intel_de_wait_for_clear(dev_priv, PORT_HOTPLUG_EN, 610 CRT_HOTPLUG_FORCE_DETECT, 1000)) 611 drm_dbg_kms(&dev_priv->drm, 612 "timed out waiting for FORCE_DETECT to go off"); 613 } 614 615 stat = intel_de_read(dev_priv, PORT_HOTPLUG_STAT); 616 if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE) 617 ret = true; 618 619 /* clear the interrupt we just generated, if any */ 620 intel_de_write(dev_priv, PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS); 621 622 i915_hotplug_interrupt_update(dev_priv, CRT_HOTPLUG_FORCE_DETECT, 0); 623 624 return ret; 625 } 626 627 static const struct drm_edid *intel_crt_get_edid(struct drm_connector *connector, 628 struct i2c_adapter *ddc) 629 { 630 const struct drm_edid *drm_edid; 631 632 drm_edid = drm_edid_read_ddc(connector, ddc); 633 634 if (!drm_edid && !intel_gmbus_is_forced_bit(ddc)) { 635 drm_dbg_kms(connector->dev, 636 "CRT GMBUS EDID read failed, retry using GPIO bit-banging\n"); 637 intel_gmbus_force_bit(ddc, true); 638 drm_edid = drm_edid_read_ddc(connector, ddc); 639 intel_gmbus_force_bit(ddc, false); 640 } 641 642 return drm_edid; 643 } 644 645 /* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */ 646 static int intel_crt_ddc_get_modes(struct drm_connector *connector, 647 struct i2c_adapter *ddc) 648 { 649 const struct drm_edid *drm_edid; 650 int ret; 651 652 drm_edid = intel_crt_get_edid(connector, ddc); 653 if (!drm_edid) 654 return 0; 655 656 ret = intel_connector_update_modes(connector, drm_edid); 657 658 drm_edid_free(drm_edid); 659 660 return ret; 661 } 662 663 static bool intel_crt_detect_ddc(struct drm_connector *connector) 664 { 665 struct intel_crt *crt = intel_attached_crt(to_intel_connector(connector)); 666 struct drm_i915_private *dev_priv = to_i915(crt->base.base.dev); 667 const struct drm_edid *drm_edid; 668 bool ret = false; 669 670 drm_edid = intel_crt_get_edid(connector, connector->ddc); 671 672 if (drm_edid) { 673 /* 674 * This may be a DVI-I connector with a shared DDC 675 * link between analog and digital outputs, so we 676 * have to check the EDID input spec of the attached device. 677 */ 678 if (drm_edid_is_digital(drm_edid)) { 679 drm_dbg_kms(&dev_priv->drm, 680 "CRT not detected via DDC:0x50 [EDID reports a digital panel]\n"); 681 } else { 682 drm_dbg_kms(&dev_priv->drm, 683 "CRT detected via DDC:0x50 [EDID]\n"); 684 ret = true; 685 } 686 } else { 687 drm_dbg_kms(&dev_priv->drm, 688 "CRT not detected via DDC:0x50 [no valid EDID found]\n"); 689 } 690 691 drm_edid_free(drm_edid); 692 693 return ret; 694 } 695 696 static enum drm_connector_status 697 intel_crt_load_detect(struct intel_crt *crt, enum pipe pipe) 698 { 699 struct drm_device *dev = crt->base.base.dev; 700 struct drm_i915_private *dev_priv = to_i915(dev); 701 enum transcoder cpu_transcoder = (enum transcoder)pipe; 702 u32 save_bclrpat; 703 u32 save_vtotal; 704 u32 vtotal, vactive; 705 u32 vsample; 706 u32 vblank, vblank_start, vblank_end; 707 u32 dsl; 708 u8 st00; 709 enum drm_connector_status status; 710 711 drm_dbg_kms(&dev_priv->drm, "starting load-detect on CRT\n"); 712 713 save_bclrpat = intel_de_read(dev_priv, BCLRPAT(cpu_transcoder)); 714 save_vtotal = intel_de_read(dev_priv, TRANS_VTOTAL(cpu_transcoder)); 715 vblank = intel_de_read(dev_priv, TRANS_VBLANK(cpu_transcoder)); 716 717 vtotal = REG_FIELD_GET(VTOTAL_MASK, save_vtotal) + 1; 718 vactive = REG_FIELD_GET(VACTIVE_MASK, save_vtotal) + 1; 719 720 vblank_start = REG_FIELD_GET(VBLANK_START_MASK, vblank) + 1; 721 vblank_end = REG_FIELD_GET(VBLANK_END_MASK, vblank) + 1; 722 723 /* Set the border color to purple. */ 724 intel_de_write(dev_priv, BCLRPAT(cpu_transcoder), 0x500050); 725 726 if (DISPLAY_VER(dev_priv) != 2) { 727 u32 transconf = intel_de_read(dev_priv, TRANSCONF(cpu_transcoder)); 728 729 intel_de_write(dev_priv, TRANSCONF(cpu_transcoder), 730 transconf | TRANSCONF_FORCE_BORDER); 731 intel_de_posting_read(dev_priv, TRANSCONF(cpu_transcoder)); 732 /* Wait for next Vblank to substitue 733 * border color for Color info */ 734 intel_crtc_wait_for_next_vblank(intel_crtc_for_pipe(dev_priv, pipe)); 735 st00 = intel_de_read8(dev_priv, _VGA_MSR_WRITE); 736 status = ((st00 & (1 << 4)) != 0) ? 737 connector_status_connected : 738 connector_status_disconnected; 739 740 intel_de_write(dev_priv, TRANSCONF(cpu_transcoder), transconf); 741 } else { 742 bool restore_vblank = false; 743 int count, detect; 744 745 /* 746 * If there isn't any border, add some. 747 * Yes, this will flicker 748 */ 749 if (vblank_start <= vactive && vblank_end >= vtotal) { 750 u32 vsync = intel_de_read(dev_priv, TRANS_VSYNC(cpu_transcoder)); 751 u32 vsync_start = REG_FIELD_GET(VSYNC_START_MASK, vsync) + 1; 752 753 vblank_start = vsync_start; 754 intel_de_write(dev_priv, TRANS_VBLANK(cpu_transcoder), 755 VBLANK_START(vblank_start - 1) | 756 VBLANK_END(vblank_end - 1)); 757 restore_vblank = true; 758 } 759 /* sample in the vertical border, selecting the larger one */ 760 if (vblank_start - vactive >= vtotal - vblank_end) 761 vsample = (vblank_start + vactive) >> 1; 762 else 763 vsample = (vtotal + vblank_end) >> 1; 764 765 /* 766 * Wait for the border to be displayed 767 */ 768 while (intel_de_read(dev_priv, PIPEDSL(pipe)) >= vactive) 769 ; 770 while ((dsl = intel_de_read(dev_priv, PIPEDSL(pipe))) <= vsample) 771 ; 772 /* 773 * Watch ST00 for an entire scanline 774 */ 775 detect = 0; 776 count = 0; 777 do { 778 count++; 779 /* Read the ST00 VGA status register */ 780 st00 = intel_de_read8(dev_priv, _VGA_MSR_WRITE); 781 if (st00 & (1 << 4)) 782 detect++; 783 } while ((intel_de_read(dev_priv, PIPEDSL(pipe)) == dsl)); 784 785 /* restore vblank if necessary */ 786 if (restore_vblank) 787 intel_de_write(dev_priv, TRANS_VBLANK(cpu_transcoder), vblank); 788 /* 789 * If more than 3/4 of the scanline detected a monitor, 790 * then it is assumed to be present. This works even on i830, 791 * where there isn't any way to force the border color across 792 * the screen 793 */ 794 status = detect * 4 > count * 3 ? 795 connector_status_connected : 796 connector_status_disconnected; 797 } 798 799 /* Restore previous settings */ 800 intel_de_write(dev_priv, BCLRPAT(cpu_transcoder), save_bclrpat); 801 802 return status; 803 } 804 805 static int intel_spurious_crt_detect_dmi_callback(const struct dmi_system_id *id) 806 { 807 DRM_DEBUG_DRIVER("Skipping CRT detection for %s\n", id->ident); 808 return 1; 809 } 810 811 static const struct dmi_system_id intel_spurious_crt_detect[] = { 812 { 813 .callback = intel_spurious_crt_detect_dmi_callback, 814 .ident = "ACER ZGB", 815 .matches = { 816 DMI_MATCH(DMI_SYS_VENDOR, "ACER"), 817 DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"), 818 }, 819 }, 820 { 821 .callback = intel_spurious_crt_detect_dmi_callback, 822 .ident = "Intel DZ77BH-55K", 823 .matches = { 824 DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"), 825 DMI_MATCH(DMI_BOARD_NAME, "DZ77BH-55K"), 826 }, 827 }, 828 { } 829 }; 830 831 static int 832 intel_crt_detect(struct drm_connector *connector, 833 struct drm_modeset_acquire_ctx *ctx, 834 bool force) 835 { 836 struct drm_i915_private *dev_priv = to_i915(connector->dev); 837 struct intel_crt *crt = intel_attached_crt(to_intel_connector(connector)); 838 struct intel_encoder *intel_encoder = &crt->base; 839 struct drm_atomic_state *state; 840 intel_wakeref_t wakeref; 841 int status; 842 843 drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] force=%d\n", 844 connector->base.id, connector->name, 845 force); 846 847 if (!intel_display_device_enabled(dev_priv)) 848 return connector_status_disconnected; 849 850 if (!intel_display_driver_check_access(dev_priv)) 851 return connector->status; 852 853 if (dev_priv->display.params.load_detect_test) { 854 wakeref = intel_display_power_get(dev_priv, 855 intel_encoder->power_domain); 856 goto load_detect; 857 } 858 859 /* Skip machines without VGA that falsely report hotplug events */ 860 if (dmi_check_system(intel_spurious_crt_detect)) 861 return connector_status_disconnected; 862 863 wakeref = intel_display_power_get(dev_priv, 864 intel_encoder->power_domain); 865 866 if (I915_HAS_HOTPLUG(dev_priv)) { 867 /* We can not rely on the HPD pin always being correctly wired 868 * up, for example many KVM do not pass it through, and so 869 * only trust an assertion that the monitor is connected. 870 */ 871 if (intel_crt_detect_hotplug(connector)) { 872 drm_dbg_kms(&dev_priv->drm, 873 "CRT detected via hotplug\n"); 874 status = connector_status_connected; 875 goto out; 876 } else 877 drm_dbg_kms(&dev_priv->drm, 878 "CRT not detected via hotplug\n"); 879 } 880 881 if (intel_crt_detect_ddc(connector)) { 882 status = connector_status_connected; 883 goto out; 884 } 885 886 /* Load detection is broken on HPD capable machines. Whoever wants a 887 * broken monitor (without edid) to work behind a broken kvm (that fails 888 * to have the right resistors for HP detection) needs to fix this up. 889 * For now just bail out. */ 890 if (I915_HAS_HOTPLUG(dev_priv)) { 891 status = connector_status_disconnected; 892 goto out; 893 } 894 895 load_detect: 896 if (!force) { 897 status = connector->status; 898 goto out; 899 } 900 901 /* for pre-945g platforms use load detect */ 902 state = intel_load_detect_get_pipe(connector, ctx); 903 if (IS_ERR(state)) { 904 status = PTR_ERR(state); 905 } else if (!state) { 906 status = connector_status_unknown; 907 } else { 908 if (intel_crt_detect_ddc(connector)) 909 status = connector_status_connected; 910 else if (DISPLAY_VER(dev_priv) < 4) 911 status = intel_crt_load_detect(crt, 912 to_intel_crtc(connector->state->crtc)->pipe); 913 else if (dev_priv->display.params.load_detect_test) 914 status = connector_status_disconnected; 915 else 916 status = connector_status_unknown; 917 intel_load_detect_release_pipe(connector, state, ctx); 918 } 919 920 out: 921 intel_display_power_put(dev_priv, intel_encoder->power_domain, wakeref); 922 923 return status; 924 } 925 926 static int intel_crt_get_modes(struct drm_connector *connector) 927 { 928 struct drm_device *dev = connector->dev; 929 struct drm_i915_private *dev_priv = to_i915(dev); 930 struct intel_crt *crt = intel_attached_crt(to_intel_connector(connector)); 931 struct intel_encoder *intel_encoder = &crt->base; 932 intel_wakeref_t wakeref; 933 struct i2c_adapter *ddc; 934 int ret; 935 936 if (!intel_display_driver_check_access(dev_priv)) 937 return drm_edid_connector_add_modes(connector); 938 939 wakeref = intel_display_power_get(dev_priv, 940 intel_encoder->power_domain); 941 942 ret = intel_crt_ddc_get_modes(connector, connector->ddc); 943 if (ret || !IS_G4X(dev_priv)) 944 goto out; 945 946 /* Try to probe digital port for output in DVI-I -> VGA mode. */ 947 ddc = intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPB); 948 ret = intel_crt_ddc_get_modes(connector, ddc); 949 950 out: 951 intel_display_power_put(dev_priv, intel_encoder->power_domain, wakeref); 952 953 return ret; 954 } 955 956 void intel_crt_reset(struct drm_encoder *encoder) 957 { 958 struct drm_i915_private *dev_priv = to_i915(encoder->dev); 959 struct intel_crt *crt = intel_encoder_to_crt(to_intel_encoder(encoder)); 960 961 if (DISPLAY_VER(dev_priv) >= 5) { 962 u32 adpa; 963 964 adpa = intel_de_read(dev_priv, crt->adpa_reg); 965 adpa &= ~ADPA_CRT_HOTPLUG_MASK; 966 adpa |= ADPA_HOTPLUG_BITS; 967 intel_de_write(dev_priv, crt->adpa_reg, adpa); 968 intel_de_posting_read(dev_priv, crt->adpa_reg); 969 970 drm_dbg_kms(&dev_priv->drm, "crt adpa set to 0x%x\n", adpa); 971 crt->force_hotplug_required = true; 972 } 973 974 } 975 976 /* 977 * Routines for controlling stuff on the analog port 978 */ 979 980 static const struct drm_connector_funcs intel_crt_connector_funcs = { 981 .fill_modes = drm_helper_probe_single_connector_modes, 982 .late_register = intel_connector_register, 983 .early_unregister = intel_connector_unregister, 984 .destroy = intel_connector_destroy, 985 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 986 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 987 }; 988 989 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = { 990 .detect_ctx = intel_crt_detect, 991 .mode_valid = intel_crt_mode_valid, 992 .get_modes = intel_crt_get_modes, 993 }; 994 995 static const struct drm_encoder_funcs intel_crt_enc_funcs = { 996 .reset = intel_crt_reset, 997 .destroy = intel_encoder_destroy, 998 }; 999 1000 void intel_crt_init(struct drm_i915_private *dev_priv) 1001 { 1002 struct drm_connector *connector; 1003 struct intel_crt *crt; 1004 struct intel_connector *intel_connector; 1005 i915_reg_t adpa_reg; 1006 u8 ddc_pin; 1007 u32 adpa; 1008 1009 if (HAS_PCH_SPLIT(dev_priv)) 1010 adpa_reg = PCH_ADPA; 1011 else if (IS_VALLEYVIEW(dev_priv)) 1012 adpa_reg = VLV_ADPA; 1013 else 1014 adpa_reg = ADPA; 1015 1016 adpa = intel_de_read(dev_priv, adpa_reg); 1017 if ((adpa & ADPA_DAC_ENABLE) == 0) { 1018 /* 1019 * On some machines (some IVB at least) CRT can be 1020 * fused off, but there's no known fuse bit to 1021 * indicate that. On these machine the ADPA register 1022 * works normally, except the DAC enable bit won't 1023 * take. So the only way to tell is attempt to enable 1024 * it and see what happens. 1025 */ 1026 intel_de_write(dev_priv, adpa_reg, 1027 adpa | ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); 1028 if ((intel_de_read(dev_priv, adpa_reg) & ADPA_DAC_ENABLE) == 0) 1029 return; 1030 intel_de_write(dev_priv, adpa_reg, adpa); 1031 } 1032 1033 crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL); 1034 if (!crt) 1035 return; 1036 1037 intel_connector = intel_connector_alloc(); 1038 if (!intel_connector) { 1039 kfree(crt); 1040 return; 1041 } 1042 1043 ddc_pin = dev_priv->display.vbt.crt_ddc_pin; 1044 1045 connector = &intel_connector->base; 1046 crt->connector = intel_connector; 1047 drm_connector_init_with_ddc(&dev_priv->drm, connector, 1048 &intel_crt_connector_funcs, 1049 DRM_MODE_CONNECTOR_VGA, 1050 intel_gmbus_get_adapter(dev_priv, ddc_pin)); 1051 1052 drm_encoder_init(&dev_priv->drm, &crt->base.base, &intel_crt_enc_funcs, 1053 DRM_MODE_ENCODER_DAC, "CRT"); 1054 1055 intel_connector_attach_encoder(intel_connector, &crt->base); 1056 1057 crt->base.type = INTEL_OUTPUT_ANALOG; 1058 crt->base.cloneable = BIT(INTEL_OUTPUT_DVO) | BIT(INTEL_OUTPUT_HDMI); 1059 if (IS_I830(dev_priv)) 1060 crt->base.pipe_mask = BIT(PIPE_A); 1061 else 1062 crt->base.pipe_mask = ~0; 1063 1064 if (DISPLAY_VER(dev_priv) != 2) 1065 connector->interlace_allowed = true; 1066 1067 crt->adpa_reg = adpa_reg; 1068 1069 crt->base.power_domain = POWER_DOMAIN_PORT_CRT; 1070 1071 if (I915_HAS_HOTPLUG(dev_priv) && 1072 !dmi_check_system(intel_spurious_crt_detect)) { 1073 crt->base.hpd_pin = HPD_CRT; 1074 crt->base.hotplug = intel_encoder_hotplug; 1075 intel_connector->polled = DRM_CONNECTOR_POLL_HPD; 1076 } else { 1077 intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT; 1078 } 1079 intel_connector->base.polled = intel_connector->polled; 1080 1081 if (HAS_DDI(dev_priv)) { 1082 assert_port_valid(dev_priv, PORT_E); 1083 1084 crt->base.port = PORT_E; 1085 crt->base.get_config = hsw_crt_get_config; 1086 crt->base.get_hw_state = intel_ddi_get_hw_state; 1087 crt->base.compute_config = hsw_crt_compute_config; 1088 crt->base.pre_pll_enable = hsw_pre_pll_enable_crt; 1089 crt->base.pre_enable = hsw_pre_enable_crt; 1090 crt->base.enable = hsw_enable_crt; 1091 crt->base.disable = hsw_disable_crt; 1092 crt->base.post_disable = hsw_post_disable_crt; 1093 crt->base.enable_clock = hsw_ddi_enable_clock; 1094 crt->base.disable_clock = hsw_ddi_disable_clock; 1095 crt->base.is_clock_enabled = hsw_ddi_is_clock_enabled; 1096 1097 intel_ddi_buf_trans_init(&crt->base); 1098 } else { 1099 if (HAS_PCH_SPLIT(dev_priv)) { 1100 crt->base.compute_config = pch_crt_compute_config; 1101 crt->base.disable = pch_disable_crt; 1102 crt->base.post_disable = pch_post_disable_crt; 1103 } else { 1104 crt->base.compute_config = intel_crt_compute_config; 1105 crt->base.disable = intel_disable_crt; 1106 } 1107 crt->base.port = PORT_NONE; 1108 crt->base.get_config = intel_crt_get_config; 1109 crt->base.get_hw_state = intel_crt_get_hw_state; 1110 crt->base.enable = intel_enable_crt; 1111 } 1112 intel_connector->get_hw_state = intel_connector_get_hw_state; 1113 1114 drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); 1115 1116 /* 1117 * TODO: find a proper way to discover whether we need to set the the 1118 * polarity and link reversal bits or not, instead of relying on the 1119 * BIOS. 1120 */ 1121 if (HAS_PCH_LPT(dev_priv)) { 1122 u32 fdi_config = FDI_RX_POLARITY_REVERSED_LPT | 1123 FDI_RX_LINK_REVERSAL_OVERRIDE; 1124 1125 dev_priv->display.fdi.rx_config = intel_de_read(dev_priv, 1126 FDI_RX_CTL(PIPE_A)) & fdi_config; 1127 } 1128 1129 intel_crt_reset(&crt->base.base); 1130 } 1131