1 /* 2 * Copyright © 2006-2010 Intel Corporation 3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: 25 * Eric Anholt <eric@anholt.net> 26 * Dave Airlie <airlied@linux.ie> 27 * Jesse Barnes <jesse.barnes@intel.com> 28 * Chris Wilson <chris@chris-wilson.co.uk> 29 */ 30 31 #include <linux/moduleparam.h> 32 #include "intel_drv.h" 33 34 void 35 intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, 36 struct drm_display_mode *adjusted_mode) 37 { 38 drm_mode_copy(adjusted_mode, fixed_mode); 39 40 drm_mode_set_crtcinfo(adjusted_mode, 0); 41 } 42 43 /** 44 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID 45 * @dev: drm device 46 * @fixed_mode : panel native mode 47 * @connector: LVDS/eDP connector 48 * 49 * Return downclock_avail 50 * Find the reduced downclock for LVDS/eDP in EDID. 51 */ 52 struct drm_display_mode * 53 intel_find_panel_downclock(struct drm_device *dev, 54 struct drm_display_mode *fixed_mode, 55 struct drm_connector *connector) 56 { 57 struct drm_display_mode *scan, *tmp_mode; 58 int temp_downclock; 59 60 temp_downclock = fixed_mode->clock; 61 tmp_mode = NULL; 62 63 list_for_each_entry(scan, &connector->probed_modes, head) { 64 /* 65 * If one mode has the same resolution with the fixed_panel 66 * mode while they have the different refresh rate, it means 67 * that the reduced downclock is found. In such 68 * case we can set the different FPx0/1 to dynamically select 69 * between low and high frequency. 70 */ 71 if (scan->hdisplay == fixed_mode->hdisplay && 72 scan->hsync_start == fixed_mode->hsync_start && 73 scan->hsync_end == fixed_mode->hsync_end && 74 scan->htotal == fixed_mode->htotal && 75 scan->vdisplay == fixed_mode->vdisplay && 76 scan->vsync_start == fixed_mode->vsync_start && 77 scan->vsync_end == fixed_mode->vsync_end && 78 scan->vtotal == fixed_mode->vtotal) { 79 if (scan->clock < temp_downclock) { 80 /* 81 * The downclock is already found. But we 82 * expect to find the lower downclock. 83 */ 84 temp_downclock = scan->clock; 85 tmp_mode = scan; 86 } 87 } 88 } 89 90 if (temp_downclock < fixed_mode->clock) 91 return drm_mode_duplicate(dev, tmp_mode); 92 else 93 return NULL; 94 } 95 96 /* adjusted_mode has been preset to be the panel's fixed mode */ 97 void 98 intel_pch_panel_fitting(struct intel_crtc *intel_crtc, 99 struct intel_crtc_config *pipe_config, 100 int fitting_mode) 101 { 102 struct drm_display_mode *adjusted_mode; 103 int x, y, width, height; 104 105 adjusted_mode = &pipe_config->adjusted_mode; 106 107 x = y = width = height = 0; 108 109 /* Native modes don't need fitting */ 110 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && 111 adjusted_mode->vdisplay == pipe_config->pipe_src_h) 112 goto done; 113 114 switch (fitting_mode) { 115 case DRM_MODE_SCALE_CENTER: 116 width = pipe_config->pipe_src_w; 117 height = pipe_config->pipe_src_h; 118 x = (adjusted_mode->hdisplay - width + 1)/2; 119 y = (adjusted_mode->vdisplay - height + 1)/2; 120 break; 121 122 case DRM_MODE_SCALE_ASPECT: 123 /* Scale but preserve the aspect ratio */ 124 { 125 u32 scaled_width = adjusted_mode->hdisplay 126 * pipe_config->pipe_src_h; 127 u32 scaled_height = pipe_config->pipe_src_w 128 * adjusted_mode->vdisplay; 129 if (scaled_width > scaled_height) { /* pillar */ 130 width = scaled_height / pipe_config->pipe_src_h; 131 if (width & 1) 132 width++; 133 x = (adjusted_mode->hdisplay - width + 1) / 2; 134 y = 0; 135 height = adjusted_mode->vdisplay; 136 } else if (scaled_width < scaled_height) { /* letter */ 137 height = scaled_width / pipe_config->pipe_src_w; 138 if (height & 1) 139 height++; 140 y = (adjusted_mode->vdisplay - height + 1) / 2; 141 x = 0; 142 width = adjusted_mode->hdisplay; 143 } else { 144 x = y = 0; 145 width = adjusted_mode->hdisplay; 146 height = adjusted_mode->vdisplay; 147 } 148 } 149 break; 150 151 case DRM_MODE_SCALE_FULLSCREEN: 152 x = y = 0; 153 width = adjusted_mode->hdisplay; 154 height = adjusted_mode->vdisplay; 155 break; 156 157 default: 158 WARN(1, "bad panel fit mode: %d\n", fitting_mode); 159 return; 160 } 161 162 done: 163 pipe_config->pch_pfit.pos = (x << 16) | y; 164 pipe_config->pch_pfit.size = (width << 16) | height; 165 pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0; 166 } 167 168 static void 169 centre_horizontally(struct drm_display_mode *mode, 170 int width) 171 { 172 u32 border, sync_pos, blank_width, sync_width; 173 174 /* keep the hsync and hblank widths constant */ 175 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start; 176 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start; 177 sync_pos = (blank_width - sync_width + 1) / 2; 178 179 border = (mode->hdisplay - width + 1) / 2; 180 border += border & 1; /* make the border even */ 181 182 mode->crtc_hdisplay = width; 183 mode->crtc_hblank_start = width + border; 184 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width; 185 186 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos; 187 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width; 188 } 189 190 static void 191 centre_vertically(struct drm_display_mode *mode, 192 int height) 193 { 194 u32 border, sync_pos, blank_width, sync_width; 195 196 /* keep the vsync and vblank widths constant */ 197 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start; 198 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start; 199 sync_pos = (blank_width - sync_width + 1) / 2; 200 201 border = (mode->vdisplay - height + 1) / 2; 202 203 mode->crtc_vdisplay = height; 204 mode->crtc_vblank_start = height + border; 205 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width; 206 207 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos; 208 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width; 209 } 210 211 static inline u32 panel_fitter_scaling(u32 source, u32 target) 212 { 213 /* 214 * Floating point operation is not supported. So the FACTOR 215 * is defined, which can avoid the floating point computation 216 * when calculating the panel ratio. 217 */ 218 #define ACCURACY 12 219 #define FACTOR (1 << ACCURACY) 220 u32 ratio = source * FACTOR / target; 221 return (FACTOR * ratio + FACTOR/2) / FACTOR; 222 } 223 224 static void i965_scale_aspect(struct intel_crtc_config *pipe_config, 225 u32 *pfit_control) 226 { 227 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; 228 u32 scaled_width = adjusted_mode->hdisplay * 229 pipe_config->pipe_src_h; 230 u32 scaled_height = pipe_config->pipe_src_w * 231 adjusted_mode->vdisplay; 232 233 /* 965+ is easy, it does everything in hw */ 234 if (scaled_width > scaled_height) 235 *pfit_control |= PFIT_ENABLE | 236 PFIT_SCALING_PILLAR; 237 else if (scaled_width < scaled_height) 238 *pfit_control |= PFIT_ENABLE | 239 PFIT_SCALING_LETTER; 240 else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w) 241 *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; 242 } 243 244 static void i9xx_scale_aspect(struct intel_crtc_config *pipe_config, 245 u32 *pfit_control, u32 *pfit_pgm_ratios, 246 u32 *border) 247 { 248 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; 249 u32 scaled_width = adjusted_mode->hdisplay * 250 pipe_config->pipe_src_h; 251 u32 scaled_height = pipe_config->pipe_src_w * 252 adjusted_mode->vdisplay; 253 u32 bits; 254 255 /* 256 * For earlier chips we have to calculate the scaling 257 * ratio by hand and program it into the 258 * PFIT_PGM_RATIO register 259 */ 260 if (scaled_width > scaled_height) { /* pillar */ 261 centre_horizontally(adjusted_mode, 262 scaled_height / 263 pipe_config->pipe_src_h); 264 265 *border = LVDS_BORDER_ENABLE; 266 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) { 267 bits = panel_fitter_scaling(pipe_config->pipe_src_h, 268 adjusted_mode->vdisplay); 269 270 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | 271 bits << PFIT_VERT_SCALE_SHIFT); 272 *pfit_control |= (PFIT_ENABLE | 273 VERT_INTERP_BILINEAR | 274 HORIZ_INTERP_BILINEAR); 275 } 276 } else if (scaled_width < scaled_height) { /* letter */ 277 centre_vertically(adjusted_mode, 278 scaled_width / 279 pipe_config->pipe_src_w); 280 281 *border = LVDS_BORDER_ENABLE; 282 if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) { 283 bits = panel_fitter_scaling(pipe_config->pipe_src_w, 284 adjusted_mode->hdisplay); 285 286 *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | 287 bits << PFIT_VERT_SCALE_SHIFT); 288 *pfit_control |= (PFIT_ENABLE | 289 VERT_INTERP_BILINEAR | 290 HORIZ_INTERP_BILINEAR); 291 } 292 } else { 293 /* Aspects match, Let hw scale both directions */ 294 *pfit_control |= (PFIT_ENABLE | 295 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | 296 VERT_INTERP_BILINEAR | 297 HORIZ_INTERP_BILINEAR); 298 } 299 } 300 301 void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, 302 struct intel_crtc_config *pipe_config, 303 int fitting_mode) 304 { 305 struct drm_device *dev = intel_crtc->base.dev; 306 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; 307 struct drm_display_mode *adjusted_mode; 308 309 adjusted_mode = &pipe_config->adjusted_mode; 310 311 /* Native modes don't need fitting */ 312 if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && 313 adjusted_mode->vdisplay == pipe_config->pipe_src_h) 314 goto out; 315 316 switch (fitting_mode) { 317 case DRM_MODE_SCALE_CENTER: 318 /* 319 * For centered modes, we have to calculate border widths & 320 * heights and modify the values programmed into the CRTC. 321 */ 322 centre_horizontally(adjusted_mode, pipe_config->pipe_src_w); 323 centre_vertically(adjusted_mode, pipe_config->pipe_src_h); 324 border = LVDS_BORDER_ENABLE; 325 break; 326 case DRM_MODE_SCALE_ASPECT: 327 /* Scale but preserve the aspect ratio */ 328 if (INTEL_INFO(dev)->gen >= 4) 329 i965_scale_aspect(pipe_config, &pfit_control); 330 else 331 i9xx_scale_aspect(pipe_config, &pfit_control, 332 &pfit_pgm_ratios, &border); 333 break; 334 case DRM_MODE_SCALE_FULLSCREEN: 335 /* 336 * Full scaling, even if it changes the aspect ratio. 337 * Fortunately this is all done for us in hw. 338 */ 339 if (pipe_config->pipe_src_h != adjusted_mode->vdisplay || 340 pipe_config->pipe_src_w != adjusted_mode->hdisplay) { 341 pfit_control |= PFIT_ENABLE; 342 if (INTEL_INFO(dev)->gen >= 4) 343 pfit_control |= PFIT_SCALING_AUTO; 344 else 345 pfit_control |= (VERT_AUTO_SCALE | 346 VERT_INTERP_BILINEAR | 347 HORIZ_AUTO_SCALE | 348 HORIZ_INTERP_BILINEAR); 349 } 350 break; 351 default: 352 WARN(1, "bad panel fit mode: %d\n", fitting_mode); 353 return; 354 } 355 356 /* 965+ wants fuzzy fitting */ 357 /* FIXME: handle multiple panels by failing gracefully */ 358 if (INTEL_INFO(dev)->gen >= 4) 359 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | 360 PFIT_FILTER_FUZZY); 361 362 out: 363 if ((pfit_control & PFIT_ENABLE) == 0) { 364 pfit_control = 0; 365 pfit_pgm_ratios = 0; 366 } 367 368 /* Make sure pre-965 set dither correctly for 18bpp panels. */ 369 if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18) 370 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 371 372 pipe_config->gmch_pfit.control = pfit_control; 373 pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios; 374 pipe_config->gmch_pfit.lvds_border_bits = border; 375 } 376 377 enum drm_connector_status 378 intel_panel_detect(struct drm_device *dev) 379 { 380 struct drm_i915_private *dev_priv = dev->dev_private; 381 382 /* Assume that the BIOS does not lie through the OpRegion... */ 383 if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) { 384 return ioread32(dev_priv->opregion.lid_state) & 0x1 ? 385 connector_status_connected : 386 connector_status_disconnected; 387 } 388 389 switch (i915.panel_ignore_lid) { 390 case -2: 391 return connector_status_connected; 392 case -1: 393 return connector_status_disconnected; 394 default: 395 return connector_status_unknown; 396 } 397 } 398 399 static u32 intel_panel_compute_brightness(struct intel_connector *connector, 400 u32 val) 401 { 402 struct drm_device *dev = connector->base.dev; 403 struct drm_i915_private *dev_priv = dev->dev_private; 404 struct intel_panel *panel = &connector->panel; 405 406 WARN_ON(panel->backlight.max == 0); 407 408 if (i915.invert_brightness < 0) 409 return val; 410 411 if (i915.invert_brightness > 0 || 412 dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { 413 return panel->backlight.max - val; 414 } 415 416 return val; 417 } 418 419 static u32 bdw_get_backlight(struct intel_connector *connector) 420 { 421 struct drm_device *dev = connector->base.dev; 422 struct drm_i915_private *dev_priv = dev->dev_private; 423 424 return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; 425 } 426 427 static u32 pch_get_backlight(struct intel_connector *connector) 428 { 429 struct drm_device *dev = connector->base.dev; 430 struct drm_i915_private *dev_priv = dev->dev_private; 431 432 return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; 433 } 434 435 static u32 i9xx_get_backlight(struct intel_connector *connector) 436 { 437 struct drm_device *dev = connector->base.dev; 438 struct drm_i915_private *dev_priv = dev->dev_private; 439 struct intel_panel *panel = &connector->panel; 440 u32 val; 441 442 val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; 443 if (INTEL_INFO(dev)->gen < 4) 444 val >>= 1; 445 446 if (panel->backlight.combination_mode) { 447 u8 lbpc; 448 449 pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); 450 val *= lbpc; 451 } 452 453 return val; 454 } 455 456 static u32 _vlv_get_backlight(struct drm_device *dev, enum i915_pipe pipe) 457 { 458 struct drm_i915_private *dev_priv = dev->dev_private; 459 460 return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; 461 } 462 463 static u32 vlv_get_backlight(struct intel_connector *connector) 464 { 465 struct drm_device *dev = connector->base.dev; 466 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 467 468 return _vlv_get_backlight(dev, pipe); 469 } 470 471 #if 0 472 static u32 intel_panel_get_backlight(struct intel_connector *connector) 473 { 474 struct drm_device *dev = connector->base.dev; 475 struct drm_i915_private *dev_priv = dev->dev_private; 476 u32 val; 477 unsigned long flags; 478 479 spin_lock_irqsave(&dev_priv->backlight_lock, flags); 480 481 val = dev_priv->display.get_backlight(connector); 482 val = intel_panel_compute_brightness(connector, val); 483 484 spin_unlock_irqrestore(&dev_priv->backlight_lock, flags); 485 486 DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); 487 return val; 488 } 489 #endif 490 491 static void bdw_set_backlight(struct intel_connector *connector, u32 level) 492 { 493 struct drm_device *dev = connector->base.dev; 494 struct drm_i915_private *dev_priv = dev->dev_private; 495 u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; 496 I915_WRITE(BLC_PWM_PCH_CTL2, val | level); 497 } 498 499 static void pch_set_backlight(struct intel_connector *connector, u32 level) 500 { 501 struct drm_device *dev = connector->base.dev; 502 struct drm_i915_private *dev_priv = dev->dev_private; 503 u32 tmp; 504 505 tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; 506 I915_WRITE(BLC_PWM_CPU_CTL, tmp | level); 507 } 508 509 static void i9xx_set_backlight(struct intel_connector *connector, u32 level) 510 { 511 struct drm_device *dev = connector->base.dev; 512 struct drm_i915_private *dev_priv = dev->dev_private; 513 struct intel_panel *panel = &connector->panel; 514 u32 tmp, mask; 515 516 WARN_ON(panel->backlight.max == 0); 517 518 if (panel->backlight.combination_mode) { 519 u8 lbpc; 520 521 lbpc = level * 0xfe / panel->backlight.max + 1; 522 level /= lbpc; 523 pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc); 524 } 525 526 if (IS_GEN4(dev)) { 527 mask = BACKLIGHT_DUTY_CYCLE_MASK; 528 } else { 529 level <<= 1; 530 mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; 531 } 532 533 tmp = I915_READ(BLC_PWM_CTL) & ~mask; 534 I915_WRITE(BLC_PWM_CTL, tmp | level); 535 } 536 537 static void vlv_set_backlight(struct intel_connector *connector, u32 level) 538 { 539 struct drm_device *dev = connector->base.dev; 540 struct drm_i915_private *dev_priv = dev->dev_private; 541 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 542 u32 tmp; 543 544 tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; 545 I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level); 546 } 547 548 static void 549 intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level) 550 { 551 struct drm_device *dev = connector->base.dev; 552 struct drm_i915_private *dev_priv = dev->dev_private; 553 554 DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); 555 556 level = intel_panel_compute_brightness(connector, level); 557 dev_priv->display.set_backlight(connector, level); 558 } 559 560 /* set backlight brightness to level in range [0..max] */ 561 void intel_panel_set_backlight(struct intel_connector *connector, u32 level, 562 u32 max) 563 { 564 struct drm_device *dev = connector->base.dev; 565 struct drm_i915_private *dev_priv = dev->dev_private; 566 struct intel_panel *panel = &connector->panel; 567 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 568 u32 freq; 569 570 if (!panel->backlight.present || pipe == INVALID_PIPE) 571 return; 572 573 spin_lock(&dev_priv->backlight_lock); 574 575 WARN_ON(panel->backlight.max == 0); 576 577 /* scale to hardware max, but be careful to not overflow */ 578 freq = panel->backlight.max; 579 if (freq < max) 580 level = level * freq / max; 581 else 582 level = freq / max * level; 583 584 panel->backlight.level = level; 585 if (panel->backlight.device) 586 panel->backlight.device->props.brightness = level; 587 588 if (panel->backlight.enabled) 589 intel_panel_actually_set_backlight(connector, level); 590 591 spin_unlock(&dev_priv->backlight_lock); 592 } 593 594 static void pch_disable_backlight(struct intel_connector *connector) 595 { 596 struct drm_device *dev = connector->base.dev; 597 struct drm_i915_private *dev_priv = dev->dev_private; 598 u32 tmp; 599 600 intel_panel_actually_set_backlight(connector, 0); 601 602 tmp = I915_READ(BLC_PWM_CPU_CTL2); 603 I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); 604 605 tmp = I915_READ(BLC_PWM_PCH_CTL1); 606 I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); 607 } 608 609 static void i9xx_disable_backlight(struct intel_connector *connector) 610 { 611 intel_panel_actually_set_backlight(connector, 0); 612 } 613 614 static void i965_disable_backlight(struct intel_connector *connector) 615 { 616 struct drm_device *dev = connector->base.dev; 617 struct drm_i915_private *dev_priv = dev->dev_private; 618 u32 tmp; 619 620 intel_panel_actually_set_backlight(connector, 0); 621 622 tmp = I915_READ(BLC_PWM_CTL2); 623 I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); 624 } 625 626 static void vlv_disable_backlight(struct intel_connector *connector) 627 { 628 struct drm_device *dev = connector->base.dev; 629 struct drm_i915_private *dev_priv = dev->dev_private; 630 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 631 u32 tmp; 632 633 intel_panel_actually_set_backlight(connector, 0); 634 635 tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe)); 636 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); 637 } 638 639 void intel_panel_disable_backlight(struct intel_connector *connector) 640 { 641 struct drm_device *dev = connector->base.dev; 642 struct drm_i915_private *dev_priv = dev->dev_private; 643 struct intel_panel *panel = &connector->panel; 644 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 645 646 if (!panel->backlight.present || pipe == INVALID_PIPE) 647 return; 648 649 /* 650 * Do not disable backlight on the vgaswitcheroo path. When switching 651 * away from i915, the other client may depend on i915 to handle the 652 * backlight. This will leave the backlight on unnecessarily when 653 * another client is not activated. 654 */ 655 if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) { 656 DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n"); 657 return; 658 } 659 660 spin_lock(&dev_priv->backlight_lock); 661 662 panel->backlight.enabled = false; 663 dev_priv->display.disable_backlight(connector); 664 665 spin_unlock(&dev_priv->backlight_lock); 666 } 667 668 static void bdw_enable_backlight(struct intel_connector *connector) 669 { 670 struct drm_device *dev = connector->base.dev; 671 struct drm_i915_private *dev_priv = dev->dev_private; 672 struct intel_panel *panel = &connector->panel; 673 u32 pch_ctl1, pch_ctl2; 674 675 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); 676 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { 677 DRM_DEBUG_KMS("pch backlight already enabled\n"); 678 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; 679 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); 680 } 681 682 pch_ctl2 = panel->backlight.max << 16; 683 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); 684 685 pch_ctl1 = 0; 686 if (panel->backlight.active_low_pwm) 687 pch_ctl1 |= BLM_PCH_POLARITY; 688 689 /* BDW always uses the pch pwm controls. */ 690 pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; 691 692 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); 693 POSTING_READ(BLC_PWM_PCH_CTL1); 694 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); 695 696 /* This won't stick until the above enable. */ 697 intel_panel_actually_set_backlight(connector, panel->backlight.level); 698 } 699 700 static void pch_enable_backlight(struct intel_connector *connector) 701 { 702 struct drm_device *dev = connector->base.dev; 703 struct drm_i915_private *dev_priv = dev->dev_private; 704 struct intel_panel *panel = &connector->panel; 705 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 706 enum transcoder cpu_transcoder = 707 intel_pipe_to_cpu_transcoder(dev_priv, pipe); 708 u32 cpu_ctl2, pch_ctl1, pch_ctl2; 709 710 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); 711 if (cpu_ctl2 & BLM_PWM_ENABLE) { 712 WARN(1, "cpu backlight already enabled\n"); 713 cpu_ctl2 &= ~BLM_PWM_ENABLE; 714 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); 715 } 716 717 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); 718 if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { 719 DRM_DEBUG_KMS("pch backlight already enabled\n"); 720 pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; 721 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); 722 } 723 724 if (cpu_transcoder == TRANSCODER_EDP) 725 cpu_ctl2 = BLM_TRANSCODER_EDP; 726 else 727 cpu_ctl2 = BLM_PIPE(cpu_transcoder); 728 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2); 729 POSTING_READ(BLC_PWM_CPU_CTL2); 730 I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); 731 732 /* This won't stick until the above enable. */ 733 intel_panel_actually_set_backlight(connector, panel->backlight.level); 734 735 pch_ctl2 = panel->backlight.max << 16; 736 I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2); 737 738 pch_ctl1 = 0; 739 if (panel->backlight.active_low_pwm) 740 pch_ctl1 |= BLM_PCH_POLARITY; 741 742 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1); 743 POSTING_READ(BLC_PWM_PCH_CTL1); 744 I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); 745 } 746 747 static void i9xx_enable_backlight(struct intel_connector *connector) 748 { 749 struct drm_device *dev = connector->base.dev; 750 struct drm_i915_private *dev_priv = dev->dev_private; 751 struct intel_panel *panel = &connector->panel; 752 u32 ctl, freq; 753 754 ctl = I915_READ(BLC_PWM_CTL); 755 if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { 756 WARN(1, "backlight already enabled\n"); 757 I915_WRITE(BLC_PWM_CTL, 0); 758 } 759 760 freq = panel->backlight.max; 761 if (panel->backlight.combination_mode) 762 freq /= 0xff; 763 764 ctl = freq << 17; 765 if (panel->backlight.combination_mode) 766 ctl |= BLM_LEGACY_MODE; 767 if (IS_PINEVIEW(dev) && panel->backlight.active_low_pwm) 768 ctl |= BLM_POLARITY_PNV; 769 770 I915_WRITE(BLC_PWM_CTL, ctl); 771 POSTING_READ(BLC_PWM_CTL); 772 773 /* XXX: combine this into above write? */ 774 intel_panel_actually_set_backlight(connector, panel->backlight.level); 775 } 776 777 static void i965_enable_backlight(struct intel_connector *connector) 778 { 779 struct drm_device *dev = connector->base.dev; 780 struct drm_i915_private *dev_priv = dev->dev_private; 781 struct intel_panel *panel = &connector->panel; 782 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 783 u32 ctl, ctl2, freq; 784 785 ctl2 = I915_READ(BLC_PWM_CTL2); 786 if (ctl2 & BLM_PWM_ENABLE) { 787 WARN(1, "backlight already enabled\n"); 788 ctl2 &= ~BLM_PWM_ENABLE; 789 I915_WRITE(BLC_PWM_CTL2, ctl2); 790 } 791 792 freq = panel->backlight.max; 793 if (panel->backlight.combination_mode) 794 freq /= 0xff; 795 796 ctl = freq << 16; 797 I915_WRITE(BLC_PWM_CTL, ctl); 798 799 ctl2 = BLM_PIPE(pipe); 800 if (panel->backlight.combination_mode) 801 ctl2 |= BLM_COMBINATION_MODE; 802 if (panel->backlight.active_low_pwm) 803 ctl2 |= BLM_POLARITY_I965; 804 I915_WRITE(BLC_PWM_CTL2, ctl2); 805 POSTING_READ(BLC_PWM_CTL2); 806 I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); 807 808 intel_panel_actually_set_backlight(connector, panel->backlight.level); 809 } 810 811 static void vlv_enable_backlight(struct intel_connector *connector) 812 { 813 struct drm_device *dev = connector->base.dev; 814 struct drm_i915_private *dev_priv = dev->dev_private; 815 struct intel_panel *panel = &connector->panel; 816 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 817 u32 ctl, ctl2; 818 819 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe)); 820 if (ctl2 & BLM_PWM_ENABLE) { 821 WARN(1, "backlight already enabled\n"); 822 ctl2 &= ~BLM_PWM_ENABLE; 823 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); 824 } 825 826 ctl = panel->backlight.max << 16; 827 I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl); 828 829 /* XXX: combine this into above write? */ 830 intel_panel_actually_set_backlight(connector, panel->backlight.level); 831 832 ctl2 = 0; 833 if (panel->backlight.active_low_pwm) 834 ctl2 |= BLM_POLARITY_I965; 835 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2); 836 POSTING_READ(VLV_BLC_PWM_CTL2(pipe)); 837 I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); 838 } 839 840 void intel_panel_enable_backlight(struct intel_connector *connector) 841 { 842 struct drm_device *dev = connector->base.dev; 843 struct drm_i915_private *dev_priv = dev->dev_private; 844 struct intel_panel *panel = &connector->panel; 845 enum i915_pipe pipe = intel_get_pipe_from_connector(connector); 846 847 if (!panel->backlight.present || pipe == INVALID_PIPE) 848 return; 849 850 DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe)); 851 852 spin_lock(&dev_priv->backlight_lock); 853 854 WARN_ON(panel->backlight.max == 0); 855 856 if (panel->backlight.level == 0) { 857 panel->backlight.level = panel->backlight.max; 858 if (panel->backlight.device) 859 panel->backlight.device->props.brightness = 860 panel->backlight.level; 861 } 862 863 dev_priv->display.enable_backlight(connector); 864 panel->backlight.enabled = true; 865 866 spin_unlock(&dev_priv->backlight_lock); 867 } 868 869 #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) 870 static int intel_backlight_device_update_status(struct backlight_device *bd) 871 { 872 struct intel_connector *connector = bl_get_data(bd); 873 struct drm_device *dev = connector->base.dev; 874 875 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 876 DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", 877 bd->props.brightness, bd->props.max_brightness); 878 intel_panel_set_backlight(connector, bd->props.brightness, 879 bd->props.max_brightness); 880 drm_modeset_unlock(&dev->mode_config.connection_mutex); 881 return 0; 882 } 883 884 static int intel_backlight_device_get_brightness(struct backlight_device *bd) 885 { 886 struct intel_connector *connector = bl_get_data(bd); 887 struct drm_device *dev = connector->base.dev; 888 struct drm_i915_private *dev_priv = dev->dev_private; 889 int ret; 890 891 intel_runtime_pm_get(dev_priv); 892 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 893 ret = intel_panel_get_backlight(connector); 894 drm_modeset_unlock(&dev->mode_config.connection_mutex); 895 intel_runtime_pm_put(dev_priv); 896 897 return ret; 898 } 899 900 static const struct backlight_ops intel_backlight_device_ops = { 901 .update_status = intel_backlight_device_update_status, 902 .get_brightness = intel_backlight_device_get_brightness, 903 }; 904 905 static int intel_backlight_device_register(struct intel_connector *connector) 906 { 907 struct intel_panel *panel = &connector->panel; 908 struct backlight_properties props; 909 910 if (WARN_ON(panel->backlight.device)) 911 return -ENODEV; 912 913 BUG_ON(panel->backlight.max == 0); 914 915 memset(&props, 0, sizeof(props)); 916 props.type = BACKLIGHT_RAW; 917 props.brightness = panel->backlight.level; 918 props.max_brightness = panel->backlight.max; 919 920 /* 921 * Note: using the same name independent of the connector prevents 922 * registration of multiple backlight devices in the driver. 923 */ 924 panel->backlight.device = 925 backlight_device_register("intel_backlight", 926 connector->base.kdev, 927 connector, 928 &intel_backlight_device_ops, &props); 929 930 if (IS_ERR(panel->backlight.device)) { 931 DRM_ERROR("Failed to register backlight: %ld\n", 932 PTR_ERR(panel->backlight.device)); 933 panel->backlight.device = NULL; 934 return -ENODEV; 935 } 936 return 0; 937 } 938 939 static void intel_backlight_device_unregister(struct intel_connector *connector) 940 { 941 struct intel_panel *panel = &connector->panel; 942 943 if (panel->backlight.device) { 944 backlight_device_unregister(panel->backlight.device); 945 panel->backlight.device = NULL; 946 } 947 } 948 #else /* CONFIG_BACKLIGHT_CLASS_DEVICE */ 949 static int intel_backlight_device_register(struct intel_connector *connector) 950 { 951 return 0; 952 } 953 static void intel_backlight_device_unregister(struct intel_connector *connector) 954 { 955 } 956 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ 957 958 /* 959 * Note: The setup hooks can't assume pipe is set! 960 * 961 * XXX: Query mode clock or hardware clock and program PWM modulation frequency 962 * appropriately when it's 0. Use VBT and/or sane defaults. 963 */ 964 static int bdw_setup_backlight(struct intel_connector *connector) 965 { 966 struct drm_device *dev = connector->base.dev; 967 struct drm_i915_private *dev_priv = dev->dev_private; 968 struct intel_panel *panel = &connector->panel; 969 u32 pch_ctl1, pch_ctl2, val; 970 971 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); 972 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; 973 974 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); 975 panel->backlight.max = pch_ctl2 >> 16; 976 if (!panel->backlight.max) 977 return -ENODEV; 978 979 val = bdw_get_backlight(connector); 980 panel->backlight.level = intel_panel_compute_brightness(connector, val); 981 982 panel->backlight.enabled = (pch_ctl1 & BLM_PCH_PWM_ENABLE) && 983 panel->backlight.level != 0; 984 985 return 0; 986 } 987 988 static int pch_setup_backlight(struct intel_connector *connector) 989 { 990 struct drm_device *dev = connector->base.dev; 991 struct drm_i915_private *dev_priv = dev->dev_private; 992 struct intel_panel *panel = &connector->panel; 993 u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; 994 995 pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1); 996 panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; 997 998 pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); 999 panel->backlight.max = pch_ctl2 >> 16; 1000 if (!panel->backlight.max) 1001 return -ENODEV; 1002 1003 val = pch_get_backlight(connector); 1004 panel->backlight.level = intel_panel_compute_brightness(connector, val); 1005 1006 cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2); 1007 panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && 1008 (pch_ctl1 & BLM_PCH_PWM_ENABLE) && panel->backlight.level != 0; 1009 1010 return 0; 1011 } 1012 1013 static int i9xx_setup_backlight(struct intel_connector *connector) 1014 { 1015 struct drm_device *dev = connector->base.dev; 1016 struct drm_i915_private *dev_priv = dev->dev_private; 1017 struct intel_panel *panel = &connector->panel; 1018 u32 ctl, val; 1019 1020 ctl = I915_READ(BLC_PWM_CTL); 1021 1022 if (IS_GEN2(dev) || IS_I915GM(dev) || IS_I945GM(dev)) 1023 panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; 1024 1025 if (IS_PINEVIEW(dev)) 1026 panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; 1027 1028 panel->backlight.max = ctl >> 17; 1029 if (panel->backlight.combination_mode) 1030 panel->backlight.max *= 0xff; 1031 1032 if (!panel->backlight.max) 1033 return -ENODEV; 1034 1035 val = i9xx_get_backlight(connector); 1036 panel->backlight.level = intel_panel_compute_brightness(connector, val); 1037 1038 panel->backlight.enabled = panel->backlight.level != 0; 1039 1040 return 0; 1041 } 1042 1043 static int i965_setup_backlight(struct intel_connector *connector) 1044 { 1045 struct drm_device *dev = connector->base.dev; 1046 struct drm_i915_private *dev_priv = dev->dev_private; 1047 struct intel_panel *panel = &connector->panel; 1048 u32 ctl, ctl2, val; 1049 1050 ctl2 = I915_READ(BLC_PWM_CTL2); 1051 panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; 1052 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; 1053 1054 ctl = I915_READ(BLC_PWM_CTL); 1055 panel->backlight.max = ctl >> 16; 1056 if (panel->backlight.combination_mode) 1057 panel->backlight.max *= 0xff; 1058 1059 if (!panel->backlight.max) 1060 return -ENODEV; 1061 1062 val = i9xx_get_backlight(connector); 1063 panel->backlight.level = intel_panel_compute_brightness(connector, val); 1064 1065 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && 1066 panel->backlight.level != 0; 1067 1068 return 0; 1069 } 1070 1071 static int vlv_setup_backlight(struct intel_connector *connector) 1072 { 1073 struct drm_device *dev = connector->base.dev; 1074 struct drm_i915_private *dev_priv = dev->dev_private; 1075 struct intel_panel *panel = &connector->panel; 1076 enum i915_pipe pipe; 1077 u32 ctl, ctl2, val; 1078 1079 for_each_pipe(pipe) { 1080 u32 cur_val = I915_READ(VLV_BLC_PWM_CTL(pipe)); 1081 1082 /* Skip if the modulation freq is already set */ 1083 if (cur_val & ~BACKLIGHT_DUTY_CYCLE_MASK) 1084 continue; 1085 1086 cur_val &= BACKLIGHT_DUTY_CYCLE_MASK; 1087 I915_WRITE(VLV_BLC_PWM_CTL(pipe), (0xf42 << 16) | 1088 cur_val); 1089 } 1090 1091 ctl2 = I915_READ(VLV_BLC_PWM_CTL2(PIPE_A)); 1092 panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; 1093 1094 ctl = I915_READ(VLV_BLC_PWM_CTL(PIPE_A)); 1095 panel->backlight.max = ctl >> 16; 1096 if (!panel->backlight.max) 1097 return -ENODEV; 1098 1099 val = _vlv_get_backlight(dev, PIPE_A); 1100 panel->backlight.level = intel_panel_compute_brightness(connector, val); 1101 1102 panel->backlight.enabled = (ctl2 & BLM_PWM_ENABLE) && 1103 panel->backlight.level != 0; 1104 1105 return 0; 1106 } 1107 1108 /* XXX: DragonFly-specific begin */ 1109 /* 1110 * Read max backlight level 1111 */ 1112 static int 1113 sysctl_backlight_max(SYSCTL_HANDLER_ARGS) 1114 { 1115 int err, val; 1116 struct intel_connector *connector = arg1; 1117 struct drm_device *dev = connector->base.dev; 1118 struct drm_i915_private *dev_priv = dev->dev_private; 1119 struct intel_panel *panel = &connector->panel; 1120 1121 spin_lock(&dev_priv->backlight_lock); 1122 val = panel->backlight.max; 1123 spin_unlock(&dev_priv->backlight_lock); 1124 1125 err = sysctl_handle_int(oidp, &val, 0, req); 1126 return(err); 1127 } 1128 1129 /* 1130 * Read/write backlight level 1131 */ 1132 static int 1133 sysctl_backlight_handler(SYSCTL_HANDLER_ARGS) 1134 { 1135 struct intel_connector *connector = arg1; 1136 struct drm_device *dev = connector->base.dev; 1137 struct drm_i915_private *dev_priv = dev->dev_private; 1138 struct intel_panel *panel = &connector->panel; 1139 int err, val; 1140 u32 max_brightness; 1141 1142 val = panel->backlight.level; 1143 1144 spin_lock(&dev_priv->backlight_lock); 1145 max_brightness = panel->backlight.max; 1146 spin_unlock(&dev_priv->backlight_lock); 1147 1148 err = sysctl_handle_int(oidp, &val, 0, req); 1149 if (err != 0 || req->newptr == NULL) { 1150 return(err); 1151 } 1152 1153 if (val != panel->backlight.level && val >=0 && 1154 val <= max_brightness) { 1155 intel_panel_set_backlight(arg1, val, max_brightness); 1156 } 1157 1158 return(err); 1159 } 1160 /* XXX: DragonFly-specific end */ 1161 1162 int intel_panel_setup_backlight(struct drm_connector *connector) 1163 { 1164 struct drm_device *dev = connector->dev; 1165 struct drm_i915_private *dev_priv = dev->dev_private; 1166 struct intel_connector *intel_connector = to_intel_connector(connector); 1167 struct intel_panel *panel = &intel_connector->panel; 1168 int ret; 1169 1170 if (!dev_priv->vbt.backlight.present) { 1171 if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { 1172 DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n"); 1173 } else { 1174 DRM_DEBUG_KMS("no backlight present per VBT\n"); 1175 return 0; 1176 } 1177 } 1178 1179 /* set level and max in panel struct */ 1180 spin_lock(&dev_priv->backlight_lock); 1181 ret = dev_priv->display.setup_backlight(intel_connector); 1182 spin_unlock(&dev_priv->backlight_lock); 1183 1184 if (ret) { 1185 DRM_DEBUG_KMS("failed to setup backlight for connector %s\n", 1186 connector->name); 1187 return ret; 1188 } 1189 1190 intel_backlight_device_register(intel_connector); 1191 1192 panel->backlight.present = true; 1193 1194 /* XXX: DragonFly-specific begin */ 1195 SYSCTL_ADD_PROC(&connector->dev->sysctl->ctx, &sysctl__hw_children, 1196 OID_AUTO, "backlight_max", 1197 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_ANYBODY, 1198 connector, sizeof(int), 1199 sysctl_backlight_max, 1200 "I", "Max backlight level"); 1201 SYSCTL_ADD_PROC(&connector->dev->sysctl->ctx, &sysctl__hw_children, 1202 OID_AUTO, "backlight_level", 1203 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_ANYBODY, 1204 connector, sizeof(int), 1205 sysctl_backlight_handler, 1206 "I", "Backlight level"); 1207 /* XXX: DragonFly-specific end */ 1208 1209 DRM_DEBUG_KMS("backlight initialized, %s, brightness %u/%u, " 1210 "sysfs interface %sregistered\n", 1211 panel->backlight.enabled ? "enabled" : "disabled", 1212 panel->backlight.level, panel->backlight.max, 1213 panel->backlight.device ? "" : "not "); 1214 1215 return 0; 1216 } 1217 1218 void intel_panel_destroy_backlight(struct drm_connector *connector) 1219 { 1220 struct intel_connector *intel_connector = to_intel_connector(connector); 1221 struct intel_panel *panel = &intel_connector->panel; 1222 1223 panel->backlight.present = false; 1224 intel_backlight_device_unregister(intel_connector); 1225 } 1226 1227 /* Set up chip specific backlight functions */ 1228 void intel_panel_init_backlight_funcs(struct drm_device *dev) 1229 { 1230 struct drm_i915_private *dev_priv = dev->dev_private; 1231 1232 if (IS_BROADWELL(dev)) { 1233 dev_priv->display.setup_backlight = bdw_setup_backlight; 1234 dev_priv->display.enable_backlight = bdw_enable_backlight; 1235 dev_priv->display.disable_backlight = pch_disable_backlight; 1236 dev_priv->display.set_backlight = bdw_set_backlight; 1237 dev_priv->display.get_backlight = bdw_get_backlight; 1238 } else if (HAS_PCH_SPLIT(dev)) { 1239 dev_priv->display.setup_backlight = pch_setup_backlight; 1240 dev_priv->display.enable_backlight = pch_enable_backlight; 1241 dev_priv->display.disable_backlight = pch_disable_backlight; 1242 dev_priv->display.set_backlight = pch_set_backlight; 1243 dev_priv->display.get_backlight = pch_get_backlight; 1244 } else if (IS_VALLEYVIEW(dev)) { 1245 dev_priv->display.setup_backlight = vlv_setup_backlight; 1246 dev_priv->display.enable_backlight = vlv_enable_backlight; 1247 dev_priv->display.disable_backlight = vlv_disable_backlight; 1248 dev_priv->display.set_backlight = vlv_set_backlight; 1249 dev_priv->display.get_backlight = vlv_get_backlight; 1250 } else if (IS_GEN4(dev)) { 1251 dev_priv->display.setup_backlight = i965_setup_backlight; 1252 dev_priv->display.enable_backlight = i965_enable_backlight; 1253 dev_priv->display.disable_backlight = i965_disable_backlight; 1254 dev_priv->display.set_backlight = i9xx_set_backlight; 1255 dev_priv->display.get_backlight = i9xx_get_backlight; 1256 } else { 1257 dev_priv->display.setup_backlight = i9xx_setup_backlight; 1258 dev_priv->display.enable_backlight = i9xx_enable_backlight; 1259 dev_priv->display.disable_backlight = i9xx_disable_backlight; 1260 dev_priv->display.set_backlight = i9xx_set_backlight; 1261 dev_priv->display.get_backlight = i9xx_get_backlight; 1262 } 1263 } 1264 1265 int intel_panel_init(struct intel_panel *panel, 1266 struct drm_display_mode *fixed_mode, 1267 struct drm_display_mode *downclock_mode) 1268 { 1269 panel->fixed_mode = fixed_mode; 1270 panel->downclock_mode = downclock_mode; 1271 1272 return 0; 1273 } 1274 1275 void intel_panel_fini(struct intel_panel *panel) 1276 { 1277 struct intel_connector *intel_connector = 1278 container_of(panel, struct intel_connector, panel); 1279 1280 if (panel->fixed_mode) 1281 drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); 1282 1283 if (panel->downclock_mode) 1284 drm_mode_destroy(intel_connector->base.dev, 1285 panel->downclock_mode); 1286 } 1287