1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright © 2006-2011 Intel Corporation 4 * 5 * Authors: 6 * Eric Anholt <eric@anholt.net> 7 * Dave Airlie <airlied@linux.ie> 8 * Jesse Barnes <jesse.barnes@intel.com> 9 */ 10 11 #include <linux/dmi.h> 12 #include <linux/i2c.h> 13 #include <linux/pm_runtime.h> 14 15 #include <drm/drm_simple_kms_helper.h> 16 17 #include "cdv_device.h" 18 #include "intel_bios.h" 19 #include "power.h" 20 #include "psb_drv.h" 21 #include "psb_intel_drv.h" 22 #include "psb_intel_reg.h" 23 24 /** 25 * LVDS I2C backlight control macros 26 */ 27 #define BRIGHTNESS_MAX_LEVEL 100 28 #define BRIGHTNESS_MASK 0xFF 29 #define BLC_I2C_TYPE 0x01 30 #define BLC_PWM_TYPT 0x02 31 32 #define BLC_POLARITY_NORMAL 0 33 #define BLC_POLARITY_INVERSE 1 34 35 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 36 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 37 #define PSB_BLC_PWM_PRECISION_FACTOR (10) 38 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 39 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 40 41 struct cdv_intel_lvds_priv { 42 /** 43 * Saved LVDO output states 44 */ 45 uint32_t savePP_ON; 46 uint32_t savePP_OFF; 47 uint32_t saveLVDS; 48 uint32_t savePP_CONTROL; 49 uint32_t savePP_CYCLE; 50 uint32_t savePFIT_CONTROL; 51 uint32_t savePFIT_PGM_RATIOS; 52 uint32_t saveBLC_PWM_CTL; 53 }; 54 55 /* 56 * Returns the maximum level of the backlight duty cycle field. 57 */ 58 static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev) 59 { 60 struct drm_psb_private *dev_priv = dev->dev_private; 61 u32 retval; 62 63 if (gma_power_begin(dev, false)) { 64 retval = ((REG_READ(BLC_PWM_CTL) & 65 BACKLIGHT_MODULATION_FREQ_MASK) >> 66 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 67 68 gma_power_end(dev); 69 } else 70 retval = ((dev_priv->regs.saveBLC_PWM_CTL & 71 BACKLIGHT_MODULATION_FREQ_MASK) >> 72 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 73 74 return retval; 75 } 76 77 /** 78 * Sets the backlight level. 79 * 80 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight(). 81 */ 82 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level) 83 { 84 struct drm_psb_private *dev_priv = dev->dev_private; 85 u32 blc_pwm_ctl; 86 87 if (gma_power_begin(dev, false)) { 88 blc_pwm_ctl = 89 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; 90 REG_WRITE(BLC_PWM_CTL, 91 (blc_pwm_ctl | 92 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 93 gma_power_end(dev); 94 } else { 95 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 96 ~BACKLIGHT_DUTY_CYCLE_MASK; 97 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 98 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 99 } 100 } 101 102 /** 103 * Sets the power state for the panel. 104 */ 105 static void cdv_intel_lvds_set_power(struct drm_device *dev, 106 struct drm_encoder *encoder, bool on) 107 { 108 struct drm_psb_private *dev_priv = dev->dev_private; 109 u32 pp_status; 110 111 if (!gma_power_begin(dev, true)) 112 return; 113 114 if (on) { 115 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 116 POWER_TARGET_ON); 117 do { 118 pp_status = REG_READ(PP_STATUS); 119 } while ((pp_status & PP_ON) == 0); 120 121 cdv_intel_lvds_set_backlight(dev, 122 dev_priv->mode_dev.backlight_duty_cycle); 123 } else { 124 cdv_intel_lvds_set_backlight(dev, 0); 125 126 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 127 ~POWER_TARGET_ON); 128 do { 129 pp_status = REG_READ(PP_STATUS); 130 } while (pp_status & PP_ON); 131 } 132 gma_power_end(dev); 133 } 134 135 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 136 { 137 struct drm_device *dev = encoder->dev; 138 if (mode == DRM_MODE_DPMS_ON) 139 cdv_intel_lvds_set_power(dev, encoder, true); 140 else 141 cdv_intel_lvds_set_power(dev, encoder, false); 142 /* XXX: We never power down the LVDS pairs. */ 143 } 144 145 static void cdv_intel_lvds_save(struct drm_connector *connector) 146 { 147 } 148 149 static void cdv_intel_lvds_restore(struct drm_connector *connector) 150 { 151 } 152 153 static enum drm_mode_status cdv_intel_lvds_mode_valid(struct drm_connector *connector, 154 struct drm_display_mode *mode) 155 { 156 struct drm_device *dev = connector->dev; 157 struct drm_psb_private *dev_priv = dev->dev_private; 158 struct drm_display_mode *fixed_mode = 159 dev_priv->mode_dev.panel_fixed_mode; 160 161 /* just in case */ 162 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 163 return MODE_NO_DBLESCAN; 164 165 /* just in case */ 166 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 167 return MODE_NO_INTERLACE; 168 169 if (fixed_mode) { 170 if (mode->hdisplay > fixed_mode->hdisplay) 171 return MODE_PANEL; 172 if (mode->vdisplay > fixed_mode->vdisplay) 173 return MODE_PANEL; 174 } 175 return MODE_OK; 176 } 177 178 static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder, 179 const struct drm_display_mode *mode, 180 struct drm_display_mode *adjusted_mode) 181 { 182 struct drm_device *dev = encoder->dev; 183 struct drm_psb_private *dev_priv = dev->dev_private; 184 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 185 struct drm_encoder *tmp_encoder; 186 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 187 188 /* Should never happen!! */ 189 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 190 head) { 191 if (tmp_encoder != encoder 192 && tmp_encoder->crtc == encoder->crtc) { 193 pr_err("Can't enable LVDS and another encoder on the same pipe\n"); 194 return false; 195 } 196 } 197 198 /* 199 * If we have timings from the BIOS for the panel, put them in 200 * to the adjusted mode. The CRTC will be set up for this mode, 201 * with the panel scaling set up to source from the H/VDisplay 202 * of the original mode. 203 */ 204 if (panel_fixed_mode != NULL) { 205 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 206 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 207 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 208 adjusted_mode->htotal = panel_fixed_mode->htotal; 209 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 210 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 211 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 212 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 213 adjusted_mode->clock = panel_fixed_mode->clock; 214 drm_mode_set_crtcinfo(adjusted_mode, 215 CRTC_INTERLACE_HALVE_V); 216 } 217 218 /* 219 * XXX: It would be nice to support lower refresh rates on the 220 * panels to reduce power consumption, and perhaps match the 221 * user's requested refresh rate. 222 */ 223 224 return true; 225 } 226 227 static void cdv_intel_lvds_prepare(struct drm_encoder *encoder) 228 { 229 struct drm_device *dev = encoder->dev; 230 struct drm_psb_private *dev_priv = dev->dev_private; 231 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 232 233 if (!gma_power_begin(dev, true)) 234 return; 235 236 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 237 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 238 BACKLIGHT_DUTY_CYCLE_MASK); 239 240 cdv_intel_lvds_set_power(dev, encoder, false); 241 242 gma_power_end(dev); 243 } 244 245 static void cdv_intel_lvds_commit(struct drm_encoder *encoder) 246 { 247 struct drm_device *dev = encoder->dev; 248 struct drm_psb_private *dev_priv = dev->dev_private; 249 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 250 251 if (mode_dev->backlight_duty_cycle == 0) 252 mode_dev->backlight_duty_cycle = 253 cdv_intel_lvds_get_max_backlight(dev); 254 255 cdv_intel_lvds_set_power(dev, encoder, true); 256 } 257 258 static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder, 259 struct drm_display_mode *mode, 260 struct drm_display_mode *adjusted_mode) 261 { 262 struct drm_device *dev = encoder->dev; 263 struct drm_psb_private *dev_priv = dev->dev_private; 264 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 265 u32 pfit_control; 266 267 /* 268 * The LVDS pin pair will already have been turned on in the 269 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL 270 * settings. 271 */ 272 273 /* 274 * Enable automatic panel scaling so that non-native modes fill the 275 * screen. Should be enabled before the pipe is enabled, according to 276 * register description and PRM. 277 */ 278 if (mode->hdisplay != adjusted_mode->hdisplay || 279 mode->vdisplay != adjusted_mode->vdisplay) 280 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 281 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 282 HORIZ_INTERP_BILINEAR); 283 else 284 pfit_control = 0; 285 286 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT; 287 288 if (dev_priv->lvds_dither) 289 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 290 291 REG_WRITE(PFIT_CONTROL, pfit_control); 292 } 293 294 /** 295 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 296 */ 297 static int cdv_intel_lvds_get_modes(struct drm_connector *connector) 298 { 299 struct drm_device *dev = connector->dev; 300 struct drm_psb_private *dev_priv = dev->dev_private; 301 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 302 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 303 int ret; 304 305 ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->adapter); 306 307 if (ret) 308 return ret; 309 310 if (mode_dev->panel_fixed_mode != NULL) { 311 struct drm_display_mode *mode = 312 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 313 drm_mode_probed_add(connector, mode); 314 return 1; 315 } 316 317 return 0; 318 } 319 320 /** 321 * cdv_intel_lvds_destroy - unregister and free LVDS structures 322 * @connector: connector to free 323 * 324 * Unregister the DDC bus for this connector then free the driver private 325 * structure. 326 */ 327 static void cdv_intel_lvds_destroy(struct drm_connector *connector) 328 { 329 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 330 331 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 332 drm_connector_unregister(connector); 333 drm_connector_cleanup(connector); 334 kfree(connector); 335 } 336 337 static int cdv_intel_lvds_set_property(struct drm_connector *connector, 338 struct drm_property *property, 339 uint64_t value) 340 { 341 struct drm_encoder *encoder = connector->encoder; 342 343 if (!strcmp(property->name, "scaling mode") && encoder) { 344 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 345 uint64_t curValue; 346 347 if (!crtc) 348 return -1; 349 350 switch (value) { 351 case DRM_MODE_SCALE_FULLSCREEN: 352 break; 353 case DRM_MODE_SCALE_NO_SCALE: 354 break; 355 case DRM_MODE_SCALE_ASPECT: 356 break; 357 default: 358 return -1; 359 } 360 361 if (drm_object_property_get_value(&connector->base, 362 property, 363 &curValue)) 364 return -1; 365 366 if (curValue == value) 367 return 0; 368 369 if (drm_object_property_set_value(&connector->base, 370 property, 371 value)) 372 return -1; 373 374 if (crtc->saved_mode.hdisplay != 0 && 375 crtc->saved_mode.vdisplay != 0) { 376 if (!drm_crtc_helper_set_mode(encoder->crtc, 377 &crtc->saved_mode, 378 encoder->crtc->x, 379 encoder->crtc->y, 380 encoder->crtc->primary->fb)) 381 return -1; 382 } 383 } else if (!strcmp(property->name, "backlight") && encoder) { 384 if (drm_object_property_set_value(&connector->base, 385 property, 386 value)) 387 return -1; 388 else 389 gma_backlight_set(encoder->dev, value); 390 } else if (!strcmp(property->name, "DPMS") && encoder) { 391 const struct drm_encoder_helper_funcs *helpers = 392 encoder->helper_private; 393 helpers->dpms(encoder, value); 394 } 395 return 0; 396 } 397 398 static const struct drm_encoder_helper_funcs 399 cdv_intel_lvds_helper_funcs = { 400 .dpms = cdv_intel_lvds_encoder_dpms, 401 .mode_fixup = cdv_intel_lvds_mode_fixup, 402 .prepare = cdv_intel_lvds_prepare, 403 .mode_set = cdv_intel_lvds_mode_set, 404 .commit = cdv_intel_lvds_commit, 405 }; 406 407 static const struct drm_connector_helper_funcs 408 cdv_intel_lvds_connector_helper_funcs = { 409 .get_modes = cdv_intel_lvds_get_modes, 410 .mode_valid = cdv_intel_lvds_mode_valid, 411 .best_encoder = gma_best_encoder, 412 }; 413 414 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = { 415 .dpms = drm_helper_connector_dpms, 416 .fill_modes = drm_helper_probe_single_connector_modes, 417 .set_property = cdv_intel_lvds_set_property, 418 .destroy = cdv_intel_lvds_destroy, 419 }; 420 421 /* 422 * Enumerate the child dev array parsed from VBT to check whether 423 * the LVDS is present. 424 * If it is present, return 1. 425 * If it is not present, return false. 426 * If no child dev is parsed from VBT, it assumes that the LVDS is present. 427 */ 428 static bool lvds_is_present_in_vbt(struct drm_device *dev, 429 u8 *i2c_pin) 430 { 431 struct drm_psb_private *dev_priv = dev->dev_private; 432 int i; 433 434 if (!dev_priv->child_dev_num) 435 return true; 436 437 for (i = 0; i < dev_priv->child_dev_num; i++) { 438 struct child_device_config *child = dev_priv->child_dev + i; 439 440 /* If the device type is not LFP, continue. 441 * We have to check both the new identifiers as well as the 442 * old for compatibility with some BIOSes. 443 */ 444 if (child->device_type != DEVICE_TYPE_INT_LFP && 445 child->device_type != DEVICE_TYPE_LFP) 446 continue; 447 448 if (child->i2c_pin) 449 *i2c_pin = child->i2c_pin; 450 451 /* However, we cannot trust the BIOS writers to populate 452 * the VBT correctly. Since LVDS requires additional 453 * information from AIM blocks, a non-zero addin offset is 454 * a good indicator that the LVDS is actually present. 455 */ 456 if (child->addin_offset) 457 return true; 458 459 /* But even then some BIOS writers perform some black magic 460 * and instantiate the device without reference to any 461 * additional data. Trust that if the VBT was written into 462 * the OpRegion then they have validated the LVDS's existence. 463 */ 464 if (dev_priv->opregion.vbt) 465 return true; 466 } 467 468 return false; 469 } 470 471 /** 472 * cdv_intel_lvds_init - setup LVDS connectors on this device 473 * @dev: drm device 474 * 475 * Create the connector, register the LVDS DDC bus, and try to figure out what 476 * modes we can display on the LVDS panel (if present). 477 */ 478 void cdv_intel_lvds_init(struct drm_device *dev, 479 struct psb_intel_mode_device *mode_dev) 480 { 481 struct gma_encoder *gma_encoder; 482 struct gma_connector *gma_connector; 483 struct cdv_intel_lvds_priv *lvds_priv; 484 struct drm_connector *connector; 485 struct drm_encoder *encoder; 486 struct drm_display_mode *scan; 487 struct drm_crtc *crtc; 488 struct drm_psb_private *dev_priv = dev->dev_private; 489 u32 lvds; 490 int pipe; 491 u8 pin; 492 493 if (!dev_priv->lvds_enabled_in_vbt) 494 return; 495 496 pin = GMBUS_PORT_PANEL; 497 if (!lvds_is_present_in_vbt(dev, &pin)) { 498 DRM_DEBUG_KMS("LVDS is not present in VBT\n"); 499 return; 500 } 501 502 gma_encoder = kzalloc(sizeof(struct gma_encoder), 503 GFP_KERNEL); 504 if (!gma_encoder) 505 return; 506 507 gma_connector = kzalloc(sizeof(struct gma_connector), 508 GFP_KERNEL); 509 if (!gma_connector) 510 goto failed_connector; 511 512 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL); 513 if (!lvds_priv) 514 goto failed_lvds_priv; 515 516 gma_encoder->dev_priv = lvds_priv; 517 518 connector = &gma_connector->base; 519 gma_connector->save = cdv_intel_lvds_save; 520 gma_connector->restore = cdv_intel_lvds_restore; 521 encoder = &gma_encoder->base; 522 523 524 drm_connector_init(dev, connector, 525 &cdv_intel_lvds_connector_funcs, 526 DRM_MODE_CONNECTOR_LVDS); 527 528 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS); 529 530 gma_connector_attach_encoder(gma_connector, gma_encoder); 531 gma_encoder->type = INTEL_OUTPUT_LVDS; 532 533 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs); 534 drm_connector_helper_add(connector, 535 &cdv_intel_lvds_connector_helper_funcs); 536 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 537 connector->interlace_allowed = false; 538 connector->doublescan_allowed = false; 539 540 /*Attach connector properties*/ 541 drm_object_attach_property(&connector->base, 542 dev->mode_config.scaling_mode_property, 543 DRM_MODE_SCALE_FULLSCREEN); 544 drm_object_attach_property(&connector->base, 545 dev_priv->backlight_property, 546 BRIGHTNESS_MAX_LEVEL); 547 548 /** 549 * Set up I2C bus 550 * FIXME: distroy i2c_bus when exit 551 */ 552 gma_encoder->i2c_bus = psb_intel_i2c_create(dev, 553 GPIOB, 554 "LVDSBLC_B"); 555 if (!gma_encoder->i2c_bus) { 556 dev_printk(KERN_ERR, 557 &dev->pdev->dev, "I2C bus registration failed.\n"); 558 goto failed_blc_i2c; 559 } 560 gma_encoder->i2c_bus->slave_addr = 0x2C; 561 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus; 562 563 /* 564 * LVDS discovery: 565 * 1) check for EDID on DDC 566 * 2) check for VBT data 567 * 3) check to see if LVDS is already on 568 * if none of the above, no panel 569 * 4) make sure lid is open 570 * if closed, act like it's not there for now 571 */ 572 573 /* Set up the DDC bus. */ 574 gma_encoder->ddc_bus = psb_intel_i2c_create(dev, 575 GPIOC, 576 "LVDSDDC_C"); 577 if (!gma_encoder->ddc_bus) { 578 dev_printk(KERN_ERR, &dev->pdev->dev, 579 "DDC bus registration " "failed.\n"); 580 goto failed_ddc; 581 } 582 583 /* 584 * Attempt to get the fixed panel mode from DDC. Assume that the 585 * preferred mode is the right one. 586 */ 587 mutex_lock(&dev->mode_config.mutex); 588 psb_intel_ddc_get_modes(connector, 589 &gma_encoder->ddc_bus->adapter); 590 list_for_each_entry(scan, &connector->probed_modes, head) { 591 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 592 mode_dev->panel_fixed_mode = 593 drm_mode_duplicate(dev, scan); 594 goto out; /* FIXME: check for quirks */ 595 } 596 } 597 598 /* Failed to get EDID, what about VBT? do we need this?*/ 599 if (dev_priv->lfp_lvds_vbt_mode) { 600 mode_dev->panel_fixed_mode = 601 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 602 if (mode_dev->panel_fixed_mode) { 603 mode_dev->panel_fixed_mode->type |= 604 DRM_MODE_TYPE_PREFERRED; 605 goto out; /* FIXME: check for quirks */ 606 } 607 } 608 /* 609 * If we didn't get EDID, try checking if the panel is already turned 610 * on. If so, assume that whatever is currently programmed is the 611 * correct mode. 612 */ 613 lvds = REG_READ(LVDS); 614 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 615 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 616 617 if (crtc && (lvds & LVDS_PORT_EN)) { 618 mode_dev->panel_fixed_mode = 619 cdv_intel_crtc_mode_get(dev, crtc); 620 if (mode_dev->panel_fixed_mode) { 621 mode_dev->panel_fixed_mode->type |= 622 DRM_MODE_TYPE_PREFERRED; 623 goto out; /* FIXME: check for quirks */ 624 } 625 } 626 627 /* If we still don't have a mode after all that, give up. */ 628 if (!mode_dev->panel_fixed_mode) { 629 DRM_DEBUG 630 ("Found no modes on the lvds, ignoring the LVDS\n"); 631 goto failed_find; 632 } 633 634 /* setup PWM */ 635 { 636 u32 pwm; 637 638 pwm = REG_READ(BLC_PWM_CTL2); 639 if (pipe == 1) 640 pwm |= PWM_PIPE_B; 641 else 642 pwm &= ~PWM_PIPE_B; 643 pwm |= PWM_ENABLE; 644 REG_WRITE(BLC_PWM_CTL2, pwm); 645 } 646 647 out: 648 mutex_unlock(&dev->mode_config.mutex); 649 drm_connector_register(connector); 650 return; 651 652 failed_find: 653 mutex_unlock(&dev->mode_config.mutex); 654 pr_err("Failed find\n"); 655 psb_intel_i2c_destroy(gma_encoder->ddc_bus); 656 failed_ddc: 657 pr_err("Failed DDC\n"); 658 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 659 failed_blc_i2c: 660 pr_err("Failed BLC\n"); 661 drm_encoder_cleanup(encoder); 662 drm_connector_cleanup(connector); 663 kfree(lvds_priv); 664 failed_lvds_priv: 665 kfree(gma_connector); 666 failed_connector: 667 kfree(gma_encoder); 668 } 669