1 /* 2 * Copyright © 2006-2011 Intel Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 * Authors: 18 * Eric Anholt <eric@anholt.net> 19 * Dave Airlie <airlied@linux.ie> 20 * Jesse Barnes <jesse.barnes@intel.com> 21 */ 22 23 #include <linux/i2c.h> 24 #include <linux/dmi.h> 25 #include <drm/drmP.h> 26 27 #include "intel_bios.h" 28 #include "psb_drv.h" 29 #include "psb_intel_drv.h" 30 #include "psb_intel_reg.h" 31 #include "power.h" 32 #include <linux/pm_runtime.h> 33 #include "cdv_device.h" 34 35 /** 36 * LVDS I2C backlight control macros 37 */ 38 #define BRIGHTNESS_MAX_LEVEL 100 39 #define BRIGHTNESS_MASK 0xFF 40 #define BLC_I2C_TYPE 0x01 41 #define BLC_PWM_TYPT 0x02 42 43 #define BLC_POLARITY_NORMAL 0 44 #define BLC_POLARITY_INVERSE 1 45 46 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 47 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 48 #define PSB_BLC_PWM_PRECISION_FACTOR (10) 49 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 50 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 51 52 struct cdv_intel_lvds_priv { 53 /** 54 * Saved LVDO output states 55 */ 56 uint32_t savePP_ON; 57 uint32_t savePP_OFF; 58 uint32_t saveLVDS; 59 uint32_t savePP_CONTROL; 60 uint32_t savePP_CYCLE; 61 uint32_t savePFIT_CONTROL; 62 uint32_t savePFIT_PGM_RATIOS; 63 uint32_t saveBLC_PWM_CTL; 64 }; 65 66 /* 67 * Returns the maximum level of the backlight duty cycle field. 68 */ 69 static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev) 70 { 71 struct drm_psb_private *dev_priv = dev->dev_private; 72 u32 retval; 73 74 if (gma_power_begin(dev, false)) { 75 retval = ((REG_READ(BLC_PWM_CTL) & 76 BACKLIGHT_MODULATION_FREQ_MASK) >> 77 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 78 79 gma_power_end(dev); 80 } else 81 retval = ((dev_priv->saveBLC_PWM_CTL & 82 BACKLIGHT_MODULATION_FREQ_MASK) >> 83 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 84 85 return retval; 86 } 87 88 /* 89 * Set LVDS backlight level by I2C command 90 */ 91 static int cdv_lvds_i2c_set_brightness(struct drm_device *dev, 92 unsigned int level) 93 { 94 struct drm_psb_private *dev_priv = dev->dev_private; 95 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 96 u8 out_buf[2]; 97 unsigned int blc_i2c_brightness; 98 99 struct i2c_msg msgs[] = { 100 { 101 .addr = lvds_i2c_bus->slave_addr, 102 .flags = 0, 103 .len = 2, 104 .buf = out_buf, 105 } 106 }; 107 108 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 109 BRIGHTNESS_MASK / 110 BRIGHTNESS_MAX_LEVEL); 111 112 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 113 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 114 115 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 116 out_buf[1] = (u8)blc_i2c_brightness; 117 118 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) 119 return 0; 120 121 DRM_ERROR("I2C transfer error\n"); 122 return -1; 123 } 124 125 126 static int cdv_lvds_pwm_set_brightness(struct drm_device *dev, int level) 127 { 128 struct drm_psb_private *dev_priv = dev->dev_private; 129 130 u32 max_pwm_blc; 131 u32 blc_pwm_duty_cycle; 132 133 max_pwm_blc = cdv_intel_lvds_get_max_backlight(dev); 134 135 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 136 BUG_ON((max_pwm_blc & PSB_BLC_MAX_PWM_REG_FREQ) == 0); 137 138 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 139 140 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 141 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 142 143 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 144 REG_WRITE(BLC_PWM_CTL, 145 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 146 (blc_pwm_duty_cycle)); 147 148 return 0; 149 } 150 151 /* 152 * Set LVDS backlight level either by I2C or PWM 153 */ 154 void cdv_intel_lvds_set_brightness(struct drm_device *dev, int level) 155 { 156 struct drm_psb_private *dev_priv = dev->dev_private; 157 158 if (!dev_priv->lvds_bl) { 159 DRM_ERROR("NO LVDS Backlight Info\n"); 160 return; 161 } 162 163 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 164 cdv_lvds_i2c_set_brightness(dev, level); 165 else 166 cdv_lvds_pwm_set_brightness(dev, level); 167 } 168 169 /** 170 * Sets the backlight level. 171 * 172 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight(). 173 */ 174 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level) 175 { 176 struct drm_psb_private *dev_priv = dev->dev_private; 177 u32 blc_pwm_ctl; 178 179 if (gma_power_begin(dev, false)) { 180 blc_pwm_ctl = 181 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; 182 REG_WRITE(BLC_PWM_CTL, 183 (blc_pwm_ctl | 184 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 185 gma_power_end(dev); 186 } else { 187 blc_pwm_ctl = dev_priv->saveBLC_PWM_CTL & 188 ~BACKLIGHT_DUTY_CYCLE_MASK; 189 dev_priv->saveBLC_PWM_CTL = (blc_pwm_ctl | 190 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 191 } 192 } 193 194 /** 195 * Sets the power state for the panel. 196 */ 197 static void cdv_intel_lvds_set_power(struct drm_device *dev, 198 struct drm_encoder *encoder, bool on) 199 { 200 struct drm_psb_private *dev_priv = dev->dev_private; 201 u32 pp_status; 202 203 if (!gma_power_begin(dev, true)) 204 return; 205 206 if (on) { 207 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 208 POWER_TARGET_ON); 209 do { 210 pp_status = REG_READ(PP_STATUS); 211 } while ((pp_status & PP_ON) == 0); 212 213 cdv_intel_lvds_set_backlight(dev, 214 dev_priv->mode_dev.backlight_duty_cycle); 215 } else { 216 cdv_intel_lvds_set_backlight(dev, 0); 217 218 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 219 ~POWER_TARGET_ON); 220 do { 221 pp_status = REG_READ(PP_STATUS); 222 } while (pp_status & PP_ON); 223 } 224 gma_power_end(dev); 225 } 226 227 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 228 { 229 struct drm_device *dev = encoder->dev; 230 if (mode == DRM_MODE_DPMS_ON) 231 cdv_intel_lvds_set_power(dev, encoder, true); 232 else 233 cdv_intel_lvds_set_power(dev, encoder, false); 234 /* XXX: We never power down the LVDS pairs. */ 235 } 236 237 static void cdv_intel_lvds_save(struct drm_connector *connector) 238 { 239 } 240 241 static void cdv_intel_lvds_restore(struct drm_connector *connector) 242 { 243 } 244 245 int cdv_intel_lvds_mode_valid(struct drm_connector *connector, 246 struct drm_display_mode *mode) 247 { 248 struct drm_device *dev = connector->dev; 249 struct drm_psb_private *dev_priv = dev->dev_private; 250 struct drm_display_mode *fixed_mode = 251 dev_priv->mode_dev.panel_fixed_mode; 252 253 /* just in case */ 254 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 255 return MODE_NO_DBLESCAN; 256 257 /* just in case */ 258 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 259 return MODE_NO_INTERLACE; 260 261 if (fixed_mode) { 262 if (mode->hdisplay > fixed_mode->hdisplay) 263 return MODE_PANEL; 264 if (mode->vdisplay > fixed_mode->vdisplay) 265 return MODE_PANEL; 266 } 267 return MODE_OK; 268 } 269 270 bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder, 271 struct drm_display_mode *mode, 272 struct drm_display_mode *adjusted_mode) 273 { 274 struct drm_device *dev = encoder->dev; 275 struct drm_psb_private *dev_priv = dev->dev_private; 276 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 277 struct drm_encoder *tmp_encoder; 278 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 279 280 /* Should never happen!! */ 281 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 282 head) { 283 if (tmp_encoder != encoder 284 && tmp_encoder->crtc == encoder->crtc) { 285 printk(KERN_ERR "Can't enable LVDS and another " 286 "encoder on the same pipe\n"); 287 return false; 288 } 289 } 290 291 /* 292 * If we have timings from the BIOS for the panel, put them in 293 * to the adjusted mode. The CRTC will be set up for this mode, 294 * with the panel scaling set up to source from the H/VDisplay 295 * of the original mode. 296 */ 297 if (panel_fixed_mode != NULL) { 298 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 299 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 300 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 301 adjusted_mode->htotal = panel_fixed_mode->htotal; 302 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 303 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 304 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 305 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 306 adjusted_mode->clock = panel_fixed_mode->clock; 307 drm_mode_set_crtcinfo(adjusted_mode, 308 CRTC_INTERLACE_HALVE_V); 309 } 310 311 /* 312 * XXX: It would be nice to support lower refresh rates on the 313 * panels to reduce power consumption, and perhaps match the 314 * user's requested refresh rate. 315 */ 316 317 return true; 318 } 319 320 static void cdv_intel_lvds_prepare(struct drm_encoder *encoder) 321 { 322 struct drm_device *dev = encoder->dev; 323 struct drm_psb_private *dev_priv = dev->dev_private; 324 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 325 326 if (!gma_power_begin(dev, true)) 327 return; 328 329 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 330 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 331 BACKLIGHT_DUTY_CYCLE_MASK); 332 333 cdv_intel_lvds_set_power(dev, encoder, false); 334 335 gma_power_end(dev); 336 } 337 338 static void cdv_intel_lvds_commit(struct drm_encoder *encoder) 339 { 340 struct drm_device *dev = encoder->dev; 341 struct drm_psb_private *dev_priv = dev->dev_private; 342 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 343 344 if (mode_dev->backlight_duty_cycle == 0) 345 mode_dev->backlight_duty_cycle = 346 cdv_intel_lvds_get_max_backlight(dev); 347 348 cdv_intel_lvds_set_power(dev, encoder, true); 349 } 350 351 static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder, 352 struct drm_display_mode *mode, 353 struct drm_display_mode *adjusted_mode) 354 { 355 struct drm_device *dev = encoder->dev; 356 struct drm_psb_private *dev_priv = dev->dev_private; 357 u32 pfit_control; 358 359 /* 360 * The LVDS pin pair will already have been turned on in the 361 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL 362 * settings. 363 */ 364 365 /* 366 * Enable automatic panel scaling so that non-native modes fill the 367 * screen. Should be enabled before the pipe is enabled, according to 368 * register description and PRM. 369 */ 370 if (mode->hdisplay != adjusted_mode->hdisplay || 371 mode->vdisplay != adjusted_mode->vdisplay) 372 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 373 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 374 HORIZ_INTERP_BILINEAR); 375 else 376 pfit_control = 0; 377 378 if (dev_priv->lvds_dither) 379 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 380 381 REG_WRITE(PFIT_CONTROL, pfit_control); 382 } 383 384 /** 385 * Detect the LVDS connection. 386 * 387 * This always returns CONNECTOR_STATUS_CONNECTED. 388 * This connector should only have 389 * been set up if the LVDS was actually connected anyway. 390 */ 391 static enum drm_connector_status cdv_intel_lvds_detect( 392 struct drm_connector *connector, bool force) 393 { 394 return connector_status_connected; 395 } 396 397 /** 398 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 399 */ 400 static int cdv_intel_lvds_get_modes(struct drm_connector *connector) 401 { 402 struct drm_device *dev = connector->dev; 403 struct drm_psb_private *dev_priv = dev->dev_private; 404 struct psb_intel_encoder *psb_intel_encoder = 405 psb_intel_attached_encoder(connector); 406 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 407 int ret; 408 409 ret = psb_intel_ddc_get_modes(connector, &psb_intel_encoder->i2c_bus->adapter); 410 411 if (ret) 412 return ret; 413 414 /* Didn't get an EDID, so 415 * Set wide sync ranges so we get all modes 416 * handed to valid_mode for checking 417 */ 418 connector->display_info.min_vfreq = 0; 419 connector->display_info.max_vfreq = 200; 420 connector->display_info.min_hfreq = 0; 421 connector->display_info.max_hfreq = 200; 422 if (mode_dev->panel_fixed_mode != NULL) { 423 struct drm_display_mode *mode = 424 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 425 drm_mode_probed_add(connector, mode); 426 return 1; 427 } 428 429 return 0; 430 } 431 432 /** 433 * cdv_intel_lvds_destroy - unregister and free LVDS structures 434 * @connector: connector to free 435 * 436 * Unregister the DDC bus for this connector then free the driver private 437 * structure. 438 */ 439 void cdv_intel_lvds_destroy(struct drm_connector *connector) 440 { 441 struct psb_intel_encoder *psb_intel_encoder = 442 psb_intel_attached_encoder(connector); 443 444 if (psb_intel_encoder->i2c_bus) 445 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus); 446 drm_sysfs_connector_remove(connector); 447 drm_connector_cleanup(connector); 448 kfree(connector); 449 } 450 451 int cdv_intel_lvds_set_property(struct drm_connector *connector, 452 struct drm_property *property, 453 uint64_t value) 454 { 455 struct drm_encoder *encoder = connector->encoder; 456 457 if (!strcmp(property->name, "scaling mode") && encoder) { 458 struct psb_intel_crtc *crtc = 459 to_psb_intel_crtc(encoder->crtc); 460 uint64_t curValue; 461 462 if (!crtc) 463 return -1; 464 465 switch (value) { 466 case DRM_MODE_SCALE_FULLSCREEN: 467 break; 468 case DRM_MODE_SCALE_NO_SCALE: 469 break; 470 case DRM_MODE_SCALE_ASPECT: 471 break; 472 default: 473 return -1; 474 } 475 476 if (drm_connector_property_get_value(connector, 477 property, 478 &curValue)) 479 return -1; 480 481 if (curValue == value) 482 return 0; 483 484 if (drm_connector_property_set_value(connector, 485 property, 486 value)) 487 return -1; 488 489 if (crtc->saved_mode.hdisplay != 0 && 490 crtc->saved_mode.vdisplay != 0) { 491 if (!drm_crtc_helper_set_mode(encoder->crtc, 492 &crtc->saved_mode, 493 encoder->crtc->x, 494 encoder->crtc->y, 495 encoder->crtc->fb)) 496 return -1; 497 } 498 } else if (!strcmp(property->name, "backlight") && encoder) { 499 if (drm_connector_property_set_value(connector, 500 property, 501 value)) 502 return -1; 503 else { 504 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE 505 struct drm_psb_private *dev_priv = 506 encoder->dev->dev_private; 507 struct backlight_device *bd = 508 dev_priv->backlight_device; 509 bd->props.brightness = value; 510 backlight_update_status(bd); 511 #endif 512 } 513 } else if (!strcmp(property->name, "DPMS") && encoder) { 514 struct drm_encoder_helper_funcs *helpers = 515 encoder->helper_private; 516 helpers->dpms(encoder, value); 517 } 518 return 0; 519 } 520 521 static const struct drm_encoder_helper_funcs 522 cdv_intel_lvds_helper_funcs = { 523 .dpms = cdv_intel_lvds_encoder_dpms, 524 .mode_fixup = cdv_intel_lvds_mode_fixup, 525 .prepare = cdv_intel_lvds_prepare, 526 .mode_set = cdv_intel_lvds_mode_set, 527 .commit = cdv_intel_lvds_commit, 528 }; 529 530 static const struct drm_connector_helper_funcs 531 cdv_intel_lvds_connector_helper_funcs = { 532 .get_modes = cdv_intel_lvds_get_modes, 533 .mode_valid = cdv_intel_lvds_mode_valid, 534 .best_encoder = psb_intel_best_encoder, 535 }; 536 537 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = { 538 .dpms = drm_helper_connector_dpms, 539 .save = cdv_intel_lvds_save, 540 .restore = cdv_intel_lvds_restore, 541 .detect = cdv_intel_lvds_detect, 542 .fill_modes = drm_helper_probe_single_connector_modes, 543 .set_property = cdv_intel_lvds_set_property, 544 .destroy = cdv_intel_lvds_destroy, 545 }; 546 547 548 static void cdv_intel_lvds_enc_destroy(struct drm_encoder *encoder) 549 { 550 drm_encoder_cleanup(encoder); 551 } 552 553 const struct drm_encoder_funcs cdv_intel_lvds_enc_funcs = { 554 .destroy = cdv_intel_lvds_enc_destroy, 555 }; 556 557 /** 558 * cdv_intel_lvds_init - setup LVDS connectors on this device 559 * @dev: drm device 560 * 561 * Create the connector, register the LVDS DDC bus, and try to figure out what 562 * modes we can display on the LVDS panel (if present). 563 */ 564 void cdv_intel_lvds_init(struct drm_device *dev, 565 struct psb_intel_mode_device *mode_dev) 566 { 567 struct psb_intel_encoder *psb_intel_encoder; 568 struct psb_intel_connector *psb_intel_connector; 569 struct cdv_intel_lvds_priv *lvds_priv; 570 struct drm_connector *connector; 571 struct drm_encoder *encoder; 572 struct drm_display_mode *scan; 573 struct drm_crtc *crtc; 574 struct drm_psb_private *dev_priv = dev->dev_private; 575 u32 lvds; 576 int pipe; 577 578 psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder), 579 GFP_KERNEL); 580 if (!psb_intel_encoder) 581 return; 582 583 psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector), 584 GFP_KERNEL); 585 if (!psb_intel_connector) 586 goto failed_connector; 587 588 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL); 589 if (!lvds_priv) 590 goto failed_lvds_priv; 591 592 psb_intel_encoder->dev_priv = lvds_priv; 593 594 connector = &psb_intel_connector->base; 595 encoder = &psb_intel_encoder->base; 596 597 598 drm_connector_init(dev, connector, 599 &cdv_intel_lvds_connector_funcs, 600 DRM_MODE_CONNECTOR_LVDS); 601 602 drm_encoder_init(dev, encoder, 603 &cdv_intel_lvds_enc_funcs, 604 DRM_MODE_ENCODER_LVDS); 605 606 607 psb_intel_connector_attach_encoder(psb_intel_connector, 608 psb_intel_encoder); 609 psb_intel_encoder->type = INTEL_OUTPUT_LVDS; 610 611 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs); 612 drm_connector_helper_add(connector, 613 &cdv_intel_lvds_connector_helper_funcs); 614 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 615 connector->interlace_allowed = false; 616 connector->doublescan_allowed = false; 617 618 /*Attach connector properties*/ 619 drm_connector_attach_property(connector, 620 dev->mode_config.scaling_mode_property, 621 DRM_MODE_SCALE_FULLSCREEN); 622 drm_connector_attach_property(connector, 623 dev_priv->backlight_property, 624 BRIGHTNESS_MAX_LEVEL); 625 626 /** 627 * Set up I2C bus 628 * FIXME: distroy i2c_bus when exit 629 */ 630 psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev, 631 GPIOB, 632 "LVDSBLC_B"); 633 if (!psb_intel_encoder->i2c_bus) { 634 dev_printk(KERN_ERR, 635 &dev->pdev->dev, "I2C bus registration failed.\n"); 636 goto failed_blc_i2c; 637 } 638 psb_intel_encoder->i2c_bus->slave_addr = 0x2C; 639 dev_priv->lvds_i2c_bus = psb_intel_encoder->i2c_bus; 640 641 /* 642 * LVDS discovery: 643 * 1) check for EDID on DDC 644 * 2) check for VBT data 645 * 3) check to see if LVDS is already on 646 * if none of the above, no panel 647 * 4) make sure lid is open 648 * if closed, act like it's not there for now 649 */ 650 651 /* Set up the DDC bus. */ 652 psb_intel_encoder->ddc_bus = psb_intel_i2c_create(dev, 653 GPIOC, 654 "LVDSDDC_C"); 655 if (!psb_intel_encoder->ddc_bus) { 656 dev_printk(KERN_ERR, &dev->pdev->dev, 657 "DDC bus registration " "failed.\n"); 658 goto failed_ddc; 659 } 660 661 /* 662 * Attempt to get the fixed panel mode from DDC. Assume that the 663 * preferred mode is the right one. 664 */ 665 psb_intel_ddc_get_modes(connector, 666 &psb_intel_encoder->ddc_bus->adapter); 667 list_for_each_entry(scan, &connector->probed_modes, head) { 668 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 669 mode_dev->panel_fixed_mode = 670 drm_mode_duplicate(dev, scan); 671 goto out; /* FIXME: check for quirks */ 672 } 673 } 674 675 /* Failed to get EDID, what about VBT? do we need this?*/ 676 if (dev_priv->lfp_lvds_vbt_mode) { 677 mode_dev->panel_fixed_mode = 678 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 679 if (mode_dev->panel_fixed_mode) { 680 mode_dev->panel_fixed_mode->type |= 681 DRM_MODE_TYPE_PREFERRED; 682 goto out; /* FIXME: check for quirks */ 683 } 684 } 685 /* 686 * If we didn't get EDID, try checking if the panel is already turned 687 * on. If so, assume that whatever is currently programmed is the 688 * correct mode. 689 */ 690 lvds = REG_READ(LVDS); 691 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 692 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 693 694 if (crtc && (lvds & LVDS_PORT_EN)) { 695 mode_dev->panel_fixed_mode = 696 cdv_intel_crtc_mode_get(dev, crtc); 697 if (mode_dev->panel_fixed_mode) { 698 mode_dev->panel_fixed_mode->type |= 699 DRM_MODE_TYPE_PREFERRED; 700 goto out; /* FIXME: check for quirks */ 701 } 702 } 703 704 /* If we still don't have a mode after all that, give up. */ 705 if (!mode_dev->panel_fixed_mode) { 706 DRM_DEBUG 707 ("Found no modes on the lvds, ignoring the LVDS\n"); 708 goto failed_find; 709 } 710 711 out: 712 drm_sysfs_connector_add(connector); 713 return; 714 715 failed_find: 716 printk(KERN_ERR "Failed find\n"); 717 if (psb_intel_encoder->ddc_bus) 718 psb_intel_i2c_destroy(psb_intel_encoder->ddc_bus); 719 failed_ddc: 720 printk(KERN_ERR "Failed DDC\n"); 721 if (psb_intel_encoder->i2c_bus) 722 psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus); 723 failed_blc_i2c: 724 printk(KERN_ERR "Failed BLC\n"); 725 drm_encoder_cleanup(encoder); 726 drm_connector_cleanup(connector); 727 kfree(lvds_priv); 728 failed_lvds_priv: 729 kfree(psb_intel_connector); 730 failed_connector: 731 kfree(psb_intel_encoder); 732 } 733