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/dmi.h> 24 #include <linux/i2c.h> 25 #include <linux/pm_runtime.h> 26 27 #include "cdv_device.h" 28 #include "intel_bios.h" 29 #include "power.h" 30 #include "psb_drv.h" 31 #include "psb_intel_drv.h" 32 #include "psb_intel_reg.h" 33 34 /** 35 * LVDS I2C backlight control macros 36 */ 37 #define BRIGHTNESS_MAX_LEVEL 100 38 #define BRIGHTNESS_MASK 0xFF 39 #define BLC_I2C_TYPE 0x01 40 #define BLC_PWM_TYPT 0x02 41 42 #define BLC_POLARITY_NORMAL 0 43 #define BLC_POLARITY_INVERSE 1 44 45 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 46 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 47 #define PSB_BLC_PWM_PRECISION_FACTOR (10) 48 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 49 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 50 51 struct cdv_intel_lvds_priv { 52 /** 53 * Saved LVDO output states 54 */ 55 uint32_t savePP_ON; 56 uint32_t savePP_OFF; 57 uint32_t saveLVDS; 58 uint32_t savePP_CONTROL; 59 uint32_t savePP_CYCLE; 60 uint32_t savePFIT_CONTROL; 61 uint32_t savePFIT_PGM_RATIOS; 62 uint32_t saveBLC_PWM_CTL; 63 }; 64 65 /* 66 * Returns the maximum level of the backlight duty cycle field. 67 */ 68 static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev) 69 { 70 struct drm_psb_private *dev_priv = dev->dev_private; 71 u32 retval; 72 73 if (gma_power_begin(dev, false)) { 74 retval = ((REG_READ(BLC_PWM_CTL) & 75 BACKLIGHT_MODULATION_FREQ_MASK) >> 76 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 77 78 gma_power_end(dev); 79 } else 80 retval = ((dev_priv->regs.saveBLC_PWM_CTL & 81 BACKLIGHT_MODULATION_FREQ_MASK) >> 82 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 83 84 return retval; 85 } 86 87 #if 0 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 #endif 169 170 /** 171 * Sets the backlight level. 172 * 173 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight(). 174 */ 175 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level) 176 { 177 struct drm_psb_private *dev_priv = dev->dev_private; 178 u32 blc_pwm_ctl; 179 180 if (gma_power_begin(dev, false)) { 181 blc_pwm_ctl = 182 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; 183 REG_WRITE(BLC_PWM_CTL, 184 (blc_pwm_ctl | 185 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 186 gma_power_end(dev); 187 } else { 188 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 189 ~BACKLIGHT_DUTY_CYCLE_MASK; 190 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 191 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 192 } 193 } 194 195 /** 196 * Sets the power state for the panel. 197 */ 198 static void cdv_intel_lvds_set_power(struct drm_device *dev, 199 struct drm_encoder *encoder, bool on) 200 { 201 struct drm_psb_private *dev_priv = dev->dev_private; 202 u32 pp_status; 203 204 if (!gma_power_begin(dev, true)) 205 return; 206 207 if (on) { 208 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 209 POWER_TARGET_ON); 210 do { 211 pp_status = REG_READ(PP_STATUS); 212 } while ((pp_status & PP_ON) == 0); 213 214 cdv_intel_lvds_set_backlight(dev, 215 dev_priv->mode_dev.backlight_duty_cycle); 216 } else { 217 cdv_intel_lvds_set_backlight(dev, 0); 218 219 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 220 ~POWER_TARGET_ON); 221 do { 222 pp_status = REG_READ(PP_STATUS); 223 } while (pp_status & PP_ON); 224 } 225 gma_power_end(dev); 226 } 227 228 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 229 { 230 struct drm_device *dev = encoder->dev; 231 if (mode == DRM_MODE_DPMS_ON) 232 cdv_intel_lvds_set_power(dev, encoder, true); 233 else 234 cdv_intel_lvds_set_power(dev, encoder, false); 235 /* XXX: We never power down the LVDS pairs. */ 236 } 237 238 static void cdv_intel_lvds_save(struct drm_connector *connector) 239 { 240 } 241 242 static void cdv_intel_lvds_restore(struct drm_connector *connector) 243 { 244 } 245 246 static enum drm_mode_status cdv_intel_lvds_mode_valid(struct drm_connector *connector, 247 struct drm_display_mode *mode) 248 { 249 struct drm_device *dev = connector->dev; 250 struct drm_psb_private *dev_priv = dev->dev_private; 251 struct drm_display_mode *fixed_mode = 252 dev_priv->mode_dev.panel_fixed_mode; 253 254 /* just in case */ 255 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 256 return MODE_NO_DBLESCAN; 257 258 /* just in case */ 259 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 260 return MODE_NO_INTERLACE; 261 262 if (fixed_mode) { 263 if (mode->hdisplay > fixed_mode->hdisplay) 264 return MODE_PANEL; 265 if (mode->vdisplay > fixed_mode->vdisplay) 266 return MODE_PANEL; 267 } 268 return MODE_OK; 269 } 270 271 static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder, 272 const struct drm_display_mode *mode, 273 struct drm_display_mode *adjusted_mode) 274 { 275 struct drm_device *dev = encoder->dev; 276 struct drm_psb_private *dev_priv = dev->dev_private; 277 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 278 struct drm_encoder *tmp_encoder; 279 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 280 281 /* Should never happen!! */ 282 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 283 head) { 284 if (tmp_encoder != encoder 285 && tmp_encoder->crtc == encoder->crtc) { 286 pr_err("Can't enable LVDS and another 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 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 358 u32 pfit_control; 359 360 /* 361 * The LVDS pin pair will already have been turned on in the 362 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL 363 * settings. 364 */ 365 366 /* 367 * Enable automatic panel scaling so that non-native modes fill the 368 * screen. Should be enabled before the pipe is enabled, according to 369 * register description and PRM. 370 */ 371 if (mode->hdisplay != adjusted_mode->hdisplay || 372 mode->vdisplay != adjusted_mode->vdisplay) 373 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 374 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 375 HORIZ_INTERP_BILINEAR); 376 else 377 pfit_control = 0; 378 379 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT; 380 381 if (dev_priv->lvds_dither) 382 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 383 384 REG_WRITE(PFIT_CONTROL, pfit_control); 385 } 386 387 /** 388 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 389 */ 390 static int cdv_intel_lvds_get_modes(struct drm_connector *connector) 391 { 392 struct drm_device *dev = connector->dev; 393 struct drm_psb_private *dev_priv = dev->dev_private; 394 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 395 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 396 int ret; 397 398 ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->adapter); 399 400 if (ret) 401 return ret; 402 403 if (mode_dev->panel_fixed_mode != NULL) { 404 struct drm_display_mode *mode = 405 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 406 drm_mode_probed_add(connector, mode); 407 return 1; 408 } 409 410 return 0; 411 } 412 413 /** 414 * cdv_intel_lvds_destroy - unregister and free LVDS structures 415 * @connector: connector to free 416 * 417 * Unregister the DDC bus for this connector then free the driver private 418 * structure. 419 */ 420 static void cdv_intel_lvds_destroy(struct drm_connector *connector) 421 { 422 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 423 424 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 425 drm_connector_unregister(connector); 426 drm_connector_cleanup(connector); 427 kfree(connector); 428 } 429 430 static int cdv_intel_lvds_set_property(struct drm_connector *connector, 431 struct drm_property *property, 432 uint64_t value) 433 { 434 struct drm_encoder *encoder = connector->encoder; 435 436 if (!strcmp(property->name, "scaling mode") && encoder) { 437 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 438 uint64_t curValue; 439 440 if (!crtc) 441 return -1; 442 443 switch (value) { 444 case DRM_MODE_SCALE_FULLSCREEN: 445 break; 446 case DRM_MODE_SCALE_NO_SCALE: 447 break; 448 case DRM_MODE_SCALE_ASPECT: 449 break; 450 default: 451 return -1; 452 } 453 454 if (drm_object_property_get_value(&connector->base, 455 property, 456 &curValue)) 457 return -1; 458 459 if (curValue == value) 460 return 0; 461 462 if (drm_object_property_set_value(&connector->base, 463 property, 464 value)) 465 return -1; 466 467 if (crtc->saved_mode.hdisplay != 0 && 468 crtc->saved_mode.vdisplay != 0) { 469 if (!drm_crtc_helper_set_mode(encoder->crtc, 470 &crtc->saved_mode, 471 encoder->crtc->x, 472 encoder->crtc->y, 473 encoder->crtc->primary->fb)) 474 return -1; 475 } 476 } else if (!strcmp(property->name, "backlight") && encoder) { 477 if (drm_object_property_set_value(&connector->base, 478 property, 479 value)) 480 return -1; 481 else 482 gma_backlight_set(encoder->dev, value); 483 } else if (!strcmp(property->name, "DPMS") && encoder) { 484 const struct drm_encoder_helper_funcs *helpers = 485 encoder->helper_private; 486 helpers->dpms(encoder, value); 487 } 488 return 0; 489 } 490 491 static const struct drm_encoder_helper_funcs 492 cdv_intel_lvds_helper_funcs = { 493 .dpms = cdv_intel_lvds_encoder_dpms, 494 .mode_fixup = cdv_intel_lvds_mode_fixup, 495 .prepare = cdv_intel_lvds_prepare, 496 .mode_set = cdv_intel_lvds_mode_set, 497 .commit = cdv_intel_lvds_commit, 498 }; 499 500 static const struct drm_connector_helper_funcs 501 cdv_intel_lvds_connector_helper_funcs = { 502 .get_modes = cdv_intel_lvds_get_modes, 503 .mode_valid = cdv_intel_lvds_mode_valid, 504 .best_encoder = gma_best_encoder, 505 }; 506 507 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = { 508 .dpms = drm_helper_connector_dpms, 509 .fill_modes = drm_helper_probe_single_connector_modes, 510 .set_property = cdv_intel_lvds_set_property, 511 .destroy = cdv_intel_lvds_destroy, 512 }; 513 514 515 static void cdv_intel_lvds_enc_destroy(struct drm_encoder *encoder) 516 { 517 drm_encoder_cleanup(encoder); 518 } 519 520 static const struct drm_encoder_funcs cdv_intel_lvds_enc_funcs = { 521 .destroy = cdv_intel_lvds_enc_destroy, 522 }; 523 524 /* 525 * Enumerate the child dev array parsed from VBT to check whether 526 * the LVDS is present. 527 * If it is present, return 1. 528 * If it is not present, return false. 529 * If no child dev is parsed from VBT, it assumes that the LVDS is present. 530 */ 531 static bool lvds_is_present_in_vbt(struct drm_device *dev, 532 u8 *i2c_pin) 533 { 534 struct drm_psb_private *dev_priv = dev->dev_private; 535 int i; 536 537 if (!dev_priv->child_dev_num) 538 return true; 539 540 for (i = 0; i < dev_priv->child_dev_num; i++) { 541 struct child_device_config *child = dev_priv->child_dev + i; 542 543 /* If the device type is not LFP, continue. 544 * We have to check both the new identifiers as well as the 545 * old for compatibility with some BIOSes. 546 */ 547 if (child->device_type != DEVICE_TYPE_INT_LFP && 548 child->device_type != DEVICE_TYPE_LFP) 549 continue; 550 551 if (child->i2c_pin) 552 *i2c_pin = child->i2c_pin; 553 554 /* However, we cannot trust the BIOS writers to populate 555 * the VBT correctly. Since LVDS requires additional 556 * information from AIM blocks, a non-zero addin offset is 557 * a good indicator that the LVDS is actually present. 558 */ 559 if (child->addin_offset) 560 return true; 561 562 /* But even then some BIOS writers perform some black magic 563 * and instantiate the device without reference to any 564 * additional data. Trust that if the VBT was written into 565 * the OpRegion then they have validated the LVDS's existence. 566 */ 567 if (dev_priv->opregion.vbt) 568 return true; 569 } 570 571 return false; 572 } 573 574 /** 575 * cdv_intel_lvds_init - setup LVDS connectors on this device 576 * @dev: drm device 577 * 578 * Create the connector, register the LVDS DDC bus, and try to figure out what 579 * modes we can display on the LVDS panel (if present). 580 */ 581 void cdv_intel_lvds_init(struct drm_device *dev, 582 struct psb_intel_mode_device *mode_dev) 583 { 584 struct gma_encoder *gma_encoder; 585 struct gma_connector *gma_connector; 586 struct cdv_intel_lvds_priv *lvds_priv; 587 struct drm_connector *connector; 588 struct drm_encoder *encoder; 589 struct drm_display_mode *scan; 590 struct drm_crtc *crtc; 591 struct drm_psb_private *dev_priv = dev->dev_private; 592 u32 lvds; 593 int pipe; 594 u8 pin; 595 596 if (!dev_priv->lvds_enabled_in_vbt) 597 return; 598 599 pin = GMBUS_PORT_PANEL; 600 if (!lvds_is_present_in_vbt(dev, &pin)) { 601 DRM_DEBUG_KMS("LVDS is not present in VBT\n"); 602 return; 603 } 604 605 gma_encoder = kzalloc(sizeof(struct gma_encoder), 606 GFP_KERNEL); 607 if (!gma_encoder) 608 return; 609 610 gma_connector = kzalloc(sizeof(struct gma_connector), 611 GFP_KERNEL); 612 if (!gma_connector) 613 goto failed_connector; 614 615 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL); 616 if (!lvds_priv) 617 goto failed_lvds_priv; 618 619 gma_encoder->dev_priv = lvds_priv; 620 621 connector = &gma_connector->base; 622 gma_connector->save = cdv_intel_lvds_save; 623 gma_connector->restore = cdv_intel_lvds_restore; 624 encoder = &gma_encoder->base; 625 626 627 drm_connector_init(dev, connector, 628 &cdv_intel_lvds_connector_funcs, 629 DRM_MODE_CONNECTOR_LVDS); 630 631 drm_encoder_init(dev, encoder, 632 &cdv_intel_lvds_enc_funcs, 633 DRM_MODE_ENCODER_LVDS, NULL); 634 635 636 gma_connector_attach_encoder(gma_connector, gma_encoder); 637 gma_encoder->type = INTEL_OUTPUT_LVDS; 638 639 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs); 640 drm_connector_helper_add(connector, 641 &cdv_intel_lvds_connector_helper_funcs); 642 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 643 connector->interlace_allowed = false; 644 connector->doublescan_allowed = false; 645 646 /*Attach connector properties*/ 647 drm_object_attach_property(&connector->base, 648 dev->mode_config.scaling_mode_property, 649 DRM_MODE_SCALE_FULLSCREEN); 650 drm_object_attach_property(&connector->base, 651 dev_priv->backlight_property, 652 BRIGHTNESS_MAX_LEVEL); 653 654 /** 655 * Set up I2C bus 656 * FIXME: distroy i2c_bus when exit 657 */ 658 gma_encoder->i2c_bus = psb_intel_i2c_create(dev, 659 GPIOB, 660 "LVDSBLC_B"); 661 if (!gma_encoder->i2c_bus) { 662 dev_printk(KERN_ERR, 663 &dev->pdev->dev, "I2C bus registration failed.\n"); 664 goto failed_blc_i2c; 665 } 666 gma_encoder->i2c_bus->slave_addr = 0x2C; 667 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus; 668 669 /* 670 * LVDS discovery: 671 * 1) check for EDID on DDC 672 * 2) check for VBT data 673 * 3) check to see if LVDS is already on 674 * if none of the above, no panel 675 * 4) make sure lid is open 676 * if closed, act like it's not there for now 677 */ 678 679 /* Set up the DDC bus. */ 680 gma_encoder->ddc_bus = psb_intel_i2c_create(dev, 681 GPIOC, 682 "LVDSDDC_C"); 683 if (!gma_encoder->ddc_bus) { 684 dev_printk(KERN_ERR, &dev->pdev->dev, 685 "DDC bus registration " "failed.\n"); 686 goto failed_ddc; 687 } 688 689 /* 690 * Attempt to get the fixed panel mode from DDC. Assume that the 691 * preferred mode is the right one. 692 */ 693 mutex_lock(&dev->mode_config.mutex); 694 psb_intel_ddc_get_modes(connector, 695 &gma_encoder->ddc_bus->adapter); 696 list_for_each_entry(scan, &connector->probed_modes, head) { 697 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 698 mode_dev->panel_fixed_mode = 699 drm_mode_duplicate(dev, scan); 700 goto out; /* FIXME: check for quirks */ 701 } 702 } 703 704 /* Failed to get EDID, what about VBT? do we need this?*/ 705 if (dev_priv->lfp_lvds_vbt_mode) { 706 mode_dev->panel_fixed_mode = 707 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 708 if (mode_dev->panel_fixed_mode) { 709 mode_dev->panel_fixed_mode->type |= 710 DRM_MODE_TYPE_PREFERRED; 711 goto out; /* FIXME: check for quirks */ 712 } 713 } 714 /* 715 * If we didn't get EDID, try checking if the panel is already turned 716 * on. If so, assume that whatever is currently programmed is the 717 * correct mode. 718 */ 719 lvds = REG_READ(LVDS); 720 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 721 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 722 723 if (crtc && (lvds & LVDS_PORT_EN)) { 724 mode_dev->panel_fixed_mode = 725 cdv_intel_crtc_mode_get(dev, crtc); 726 if (mode_dev->panel_fixed_mode) { 727 mode_dev->panel_fixed_mode->type |= 728 DRM_MODE_TYPE_PREFERRED; 729 goto out; /* FIXME: check for quirks */ 730 } 731 } 732 733 /* If we still don't have a mode after all that, give up. */ 734 if (!mode_dev->panel_fixed_mode) { 735 DRM_DEBUG 736 ("Found no modes on the lvds, ignoring the LVDS\n"); 737 goto failed_find; 738 } 739 740 /* setup PWM */ 741 { 742 u32 pwm; 743 744 pwm = REG_READ(BLC_PWM_CTL2); 745 if (pipe == 1) 746 pwm |= PWM_PIPE_B; 747 else 748 pwm &= ~PWM_PIPE_B; 749 pwm |= PWM_ENABLE; 750 REG_WRITE(BLC_PWM_CTL2, pwm); 751 } 752 753 out: 754 mutex_unlock(&dev->mode_config.mutex); 755 drm_connector_register(connector); 756 return; 757 758 failed_find: 759 mutex_unlock(&dev->mode_config.mutex); 760 pr_err("Failed find\n"); 761 psb_intel_i2c_destroy(gma_encoder->ddc_bus); 762 failed_ddc: 763 pr_err("Failed DDC\n"); 764 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 765 failed_blc_i2c: 766 pr_err("Failed BLC\n"); 767 drm_encoder_cleanup(encoder); 768 drm_connector_cleanup(connector); 769 kfree(lvds_priv); 770 failed_lvds_priv: 771 kfree(gma_connector); 772 failed_connector: 773 kfree(gma_encoder); 774 } 775