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->regs.saveBLC_PWM_CTL & 82 BACKLIGHT_MODULATION_FREQ_MASK) >> 83 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; 84 85 return retval; 86 } 87 88 #if 0 89 /* 90 * Set LVDS backlight level by I2C command 91 */ 92 static int cdv_lvds_i2c_set_brightness(struct drm_device *dev, 93 unsigned int level) 94 { 95 struct drm_psb_private *dev_priv = dev->dev_private; 96 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 97 u8 out_buf[2]; 98 unsigned int blc_i2c_brightness; 99 100 struct i2c_msg msgs[] = { 101 { 102 .addr = lvds_i2c_bus->slave_addr, 103 .flags = 0, 104 .len = 2, 105 .buf = out_buf, 106 } 107 }; 108 109 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 110 BRIGHTNESS_MASK / 111 BRIGHTNESS_MAX_LEVEL); 112 113 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 114 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 115 116 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 117 out_buf[1] = (u8)blc_i2c_brightness; 118 119 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) 120 return 0; 121 122 DRM_ERROR("I2C transfer error\n"); 123 return -1; 124 } 125 126 127 static int cdv_lvds_pwm_set_brightness(struct drm_device *dev, int level) 128 { 129 struct drm_psb_private *dev_priv = dev->dev_private; 130 131 u32 max_pwm_blc; 132 u32 blc_pwm_duty_cycle; 133 134 max_pwm_blc = cdv_intel_lvds_get_max_backlight(dev); 135 136 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 137 BUG_ON((max_pwm_blc & PSB_BLC_MAX_PWM_REG_FREQ) == 0); 138 139 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 140 141 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 142 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 143 144 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 145 REG_WRITE(BLC_PWM_CTL, 146 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 147 (blc_pwm_duty_cycle)); 148 149 return 0; 150 } 151 152 /* 153 * Set LVDS backlight level either by I2C or PWM 154 */ 155 void cdv_intel_lvds_set_brightness(struct drm_device *dev, int level) 156 { 157 struct drm_psb_private *dev_priv = dev->dev_private; 158 159 if (!dev_priv->lvds_bl) { 160 DRM_ERROR("NO LVDS Backlight Info\n"); 161 return; 162 } 163 164 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 165 cdv_lvds_i2c_set_brightness(dev, level); 166 else 167 cdv_lvds_pwm_set_brightness(dev, level); 168 } 169 #endif 170 171 /** 172 * Sets the backlight level. 173 * 174 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight(). 175 */ 176 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level) 177 { 178 struct drm_psb_private *dev_priv = dev->dev_private; 179 u32 blc_pwm_ctl; 180 181 if (gma_power_begin(dev, false)) { 182 blc_pwm_ctl = 183 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; 184 REG_WRITE(BLC_PWM_CTL, 185 (blc_pwm_ctl | 186 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 187 gma_power_end(dev); 188 } else { 189 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 190 ~BACKLIGHT_DUTY_CYCLE_MASK; 191 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 192 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 193 } 194 } 195 196 /** 197 * Sets the power state for the panel. 198 */ 199 static void cdv_intel_lvds_set_power(struct drm_device *dev, 200 struct drm_encoder *encoder, bool on) 201 { 202 struct drm_psb_private *dev_priv = dev->dev_private; 203 u32 pp_status; 204 205 if (!gma_power_begin(dev, true)) 206 return; 207 208 if (on) { 209 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 210 POWER_TARGET_ON); 211 do { 212 pp_status = REG_READ(PP_STATUS); 213 } while ((pp_status & PP_ON) == 0); 214 215 cdv_intel_lvds_set_backlight(dev, 216 dev_priv->mode_dev.backlight_duty_cycle); 217 } else { 218 cdv_intel_lvds_set_backlight(dev, 0); 219 220 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 221 ~POWER_TARGET_ON); 222 do { 223 pp_status = REG_READ(PP_STATUS); 224 } while (pp_status & PP_ON); 225 } 226 gma_power_end(dev); 227 } 228 229 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 230 { 231 struct drm_device *dev = encoder->dev; 232 if (mode == DRM_MODE_DPMS_ON) 233 cdv_intel_lvds_set_power(dev, encoder, true); 234 else 235 cdv_intel_lvds_set_power(dev, encoder, false); 236 /* XXX: We never power down the LVDS pairs. */ 237 } 238 239 static void cdv_intel_lvds_save(struct drm_connector *connector) 240 { 241 } 242 243 static void cdv_intel_lvds_restore(struct drm_connector *connector) 244 { 245 } 246 247 static int cdv_intel_lvds_mode_valid(struct drm_connector *connector, 248 struct drm_display_mode *mode) 249 { 250 struct drm_device *dev = connector->dev; 251 struct drm_psb_private *dev_priv = dev->dev_private; 252 struct drm_display_mode *fixed_mode = 253 dev_priv->mode_dev.panel_fixed_mode; 254 255 /* just in case */ 256 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 257 return MODE_NO_DBLESCAN; 258 259 /* just in case */ 260 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 261 return MODE_NO_INTERLACE; 262 263 if (fixed_mode) { 264 if (mode->hdisplay > fixed_mode->hdisplay) 265 return MODE_PANEL; 266 if (mode->vdisplay > fixed_mode->vdisplay) 267 return MODE_PANEL; 268 } 269 return MODE_OK; 270 } 271 272 static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder, 273 const struct drm_display_mode *mode, 274 struct drm_display_mode *adjusted_mode) 275 { 276 struct drm_device *dev = encoder->dev; 277 struct drm_psb_private *dev_priv = dev->dev_private; 278 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 279 struct drm_encoder *tmp_encoder; 280 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 281 282 /* Should never happen!! */ 283 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 284 head) { 285 if (tmp_encoder != encoder 286 && tmp_encoder->crtc == encoder->crtc) { 287 printk(KERN_ERR "Can't enable LVDS and another " 288 "encoder on the same pipe\n"); 289 return false; 290 } 291 } 292 293 /* 294 * If we have timings from the BIOS for the panel, put them in 295 * to the adjusted mode. The CRTC will be set up for this mode, 296 * with the panel scaling set up to source from the H/VDisplay 297 * of the original mode. 298 */ 299 if (panel_fixed_mode != NULL) { 300 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 301 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 302 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 303 adjusted_mode->htotal = panel_fixed_mode->htotal; 304 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 305 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 306 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 307 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 308 adjusted_mode->clock = panel_fixed_mode->clock; 309 drm_mode_set_crtcinfo(adjusted_mode, 310 CRTC_INTERLACE_HALVE_V); 311 } 312 313 /* 314 * XXX: It would be nice to support lower refresh rates on the 315 * panels to reduce power consumption, and perhaps match the 316 * user's requested refresh rate. 317 */ 318 319 return true; 320 } 321 322 static void cdv_intel_lvds_prepare(struct drm_encoder *encoder) 323 { 324 struct drm_device *dev = encoder->dev; 325 struct drm_psb_private *dev_priv = dev->dev_private; 326 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 327 328 if (!gma_power_begin(dev, true)) 329 return; 330 331 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 332 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 333 BACKLIGHT_DUTY_CYCLE_MASK); 334 335 cdv_intel_lvds_set_power(dev, encoder, false); 336 337 gma_power_end(dev); 338 } 339 340 static void cdv_intel_lvds_commit(struct drm_encoder *encoder) 341 { 342 struct drm_device *dev = encoder->dev; 343 struct drm_psb_private *dev_priv = dev->dev_private; 344 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 345 346 if (mode_dev->backlight_duty_cycle == 0) 347 mode_dev->backlight_duty_cycle = 348 cdv_intel_lvds_get_max_backlight(dev); 349 350 cdv_intel_lvds_set_power(dev, encoder, true); 351 } 352 353 static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder, 354 struct drm_display_mode *mode, 355 struct drm_display_mode *adjusted_mode) 356 { 357 struct drm_device *dev = encoder->dev; 358 struct drm_psb_private *dev_priv = dev->dev_private; 359 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 360 u32 pfit_control; 361 362 /* 363 * The LVDS pin pair will already have been turned on in the 364 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL 365 * settings. 366 */ 367 368 /* 369 * Enable automatic panel scaling so that non-native modes fill the 370 * screen. Should be enabled before the pipe is enabled, according to 371 * register description and PRM. 372 */ 373 if (mode->hdisplay != adjusted_mode->hdisplay || 374 mode->vdisplay != adjusted_mode->vdisplay) 375 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 376 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 377 HORIZ_INTERP_BILINEAR); 378 else 379 pfit_control = 0; 380 381 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT; 382 383 if (dev_priv->lvds_dither) 384 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 385 386 REG_WRITE(PFIT_CONTROL, pfit_control); 387 } 388 389 /** 390 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 391 */ 392 static int cdv_intel_lvds_get_modes(struct drm_connector *connector) 393 { 394 struct drm_device *dev = connector->dev; 395 struct drm_psb_private *dev_priv = dev->dev_private; 396 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 397 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 398 int ret; 399 400 ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->adapter); 401 402 if (ret) 403 return ret; 404 405 if (mode_dev->panel_fixed_mode != NULL) { 406 struct drm_display_mode *mode = 407 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 408 drm_mode_probed_add(connector, mode); 409 return 1; 410 } 411 412 return 0; 413 } 414 415 /** 416 * cdv_intel_lvds_destroy - unregister and free LVDS structures 417 * @connector: connector to free 418 * 419 * Unregister the DDC bus for this connector then free the driver private 420 * structure. 421 */ 422 static void cdv_intel_lvds_destroy(struct drm_connector *connector) 423 { 424 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 425 426 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 427 drm_connector_unregister(connector); 428 drm_connector_cleanup(connector); 429 kfree(connector); 430 } 431 432 static int cdv_intel_lvds_set_property(struct drm_connector *connector, 433 struct drm_property *property, 434 uint64_t value) 435 { 436 struct drm_encoder *encoder = connector->encoder; 437 438 if (!strcmp(property->name, "scaling mode") && encoder) { 439 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 440 uint64_t curValue; 441 442 if (!crtc) 443 return -1; 444 445 switch (value) { 446 case DRM_MODE_SCALE_FULLSCREEN: 447 break; 448 case DRM_MODE_SCALE_NO_SCALE: 449 break; 450 case DRM_MODE_SCALE_ASPECT: 451 break; 452 default: 453 return -1; 454 } 455 456 if (drm_object_property_get_value(&connector->base, 457 property, 458 &curValue)) 459 return -1; 460 461 if (curValue == value) 462 return 0; 463 464 if (drm_object_property_set_value(&connector->base, 465 property, 466 value)) 467 return -1; 468 469 if (crtc->saved_mode.hdisplay != 0 && 470 crtc->saved_mode.vdisplay != 0) { 471 if (!drm_crtc_helper_set_mode(encoder->crtc, 472 &crtc->saved_mode, 473 encoder->crtc->x, 474 encoder->crtc->y, 475 encoder->crtc->primary->fb)) 476 return -1; 477 } 478 } else if (!strcmp(property->name, "backlight") && encoder) { 479 if (drm_object_property_set_value(&connector->base, 480 property, 481 value)) 482 return -1; 483 else 484 gma_backlight_set(encoder->dev, value); 485 } else if (!strcmp(property->name, "DPMS") && encoder) { 486 const struct drm_encoder_helper_funcs *helpers = 487 encoder->helper_private; 488 helpers->dpms(encoder, value); 489 } 490 return 0; 491 } 492 493 static const struct drm_encoder_helper_funcs 494 cdv_intel_lvds_helper_funcs = { 495 .dpms = cdv_intel_lvds_encoder_dpms, 496 .mode_fixup = cdv_intel_lvds_mode_fixup, 497 .prepare = cdv_intel_lvds_prepare, 498 .mode_set = cdv_intel_lvds_mode_set, 499 .commit = cdv_intel_lvds_commit, 500 }; 501 502 static const struct drm_connector_helper_funcs 503 cdv_intel_lvds_connector_helper_funcs = { 504 .get_modes = cdv_intel_lvds_get_modes, 505 .mode_valid = cdv_intel_lvds_mode_valid, 506 .best_encoder = gma_best_encoder, 507 }; 508 509 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = { 510 .dpms = drm_helper_connector_dpms, 511 .fill_modes = drm_helper_probe_single_connector_modes, 512 .set_property = cdv_intel_lvds_set_property, 513 .destroy = cdv_intel_lvds_destroy, 514 }; 515 516 517 static void cdv_intel_lvds_enc_destroy(struct drm_encoder *encoder) 518 { 519 drm_encoder_cleanup(encoder); 520 } 521 522 static const struct drm_encoder_funcs cdv_intel_lvds_enc_funcs = { 523 .destroy = cdv_intel_lvds_enc_destroy, 524 }; 525 526 /* 527 * Enumerate the child dev array parsed from VBT to check whether 528 * the LVDS is present. 529 * If it is present, return 1. 530 * If it is not present, return false. 531 * If no child dev is parsed from VBT, it assumes that the LVDS is present. 532 */ 533 static bool lvds_is_present_in_vbt(struct drm_device *dev, 534 u8 *i2c_pin) 535 { 536 struct drm_psb_private *dev_priv = dev->dev_private; 537 int i; 538 539 if (!dev_priv->child_dev_num) 540 return true; 541 542 for (i = 0; i < dev_priv->child_dev_num; i++) { 543 struct child_device_config *child = dev_priv->child_dev + i; 544 545 /* If the device type is not LFP, continue. 546 * We have to check both the new identifiers as well as the 547 * old for compatibility with some BIOSes. 548 */ 549 if (child->device_type != DEVICE_TYPE_INT_LFP && 550 child->device_type != DEVICE_TYPE_LFP) 551 continue; 552 553 if (child->i2c_pin) 554 *i2c_pin = child->i2c_pin; 555 556 /* However, we cannot trust the BIOS writers to populate 557 * the VBT correctly. Since LVDS requires additional 558 * information from AIM blocks, a non-zero addin offset is 559 * a good indicator that the LVDS is actually present. 560 */ 561 if (child->addin_offset) 562 return true; 563 564 /* But even then some BIOS writers perform some black magic 565 * and instantiate the device without reference to any 566 * additional data. Trust that if the VBT was written into 567 * the OpRegion then they have validated the LVDS's existence. 568 */ 569 if (dev_priv->opregion.vbt) 570 return true; 571 } 572 573 return false; 574 } 575 576 /** 577 * cdv_intel_lvds_init - setup LVDS connectors on this device 578 * @dev: drm device 579 * 580 * Create the connector, register the LVDS DDC bus, and try to figure out what 581 * modes we can display on the LVDS panel (if present). 582 */ 583 void cdv_intel_lvds_init(struct drm_device *dev, 584 struct psb_intel_mode_device *mode_dev) 585 { 586 struct gma_encoder *gma_encoder; 587 struct gma_connector *gma_connector; 588 struct cdv_intel_lvds_priv *lvds_priv; 589 struct drm_connector *connector; 590 struct drm_encoder *encoder; 591 struct drm_display_mode *scan; 592 struct drm_crtc *crtc; 593 struct drm_psb_private *dev_priv = dev->dev_private; 594 u32 lvds; 595 int pipe; 596 u8 pin; 597 598 pin = GMBUS_PORT_PANEL; 599 if (!lvds_is_present_in_vbt(dev, &pin)) { 600 DRM_DEBUG_KMS("LVDS is not present in VBT\n"); 601 return; 602 } 603 604 gma_encoder = kzalloc(sizeof(struct gma_encoder), 605 GFP_KERNEL); 606 if (!gma_encoder) 607 return; 608 609 gma_connector = kzalloc(sizeof(struct gma_connector), 610 GFP_KERNEL); 611 if (!gma_connector) 612 goto failed_connector; 613 614 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL); 615 if (!lvds_priv) 616 goto failed_lvds_priv; 617 618 gma_encoder->dev_priv = lvds_priv; 619 620 connector = &gma_connector->base; 621 gma_connector->save = cdv_intel_lvds_save; 622 gma_connector->restore = cdv_intel_lvds_restore; 623 encoder = &gma_encoder->base; 624 625 626 drm_connector_init(dev, connector, 627 &cdv_intel_lvds_connector_funcs, 628 DRM_MODE_CONNECTOR_LVDS); 629 630 drm_encoder_init(dev, encoder, 631 &cdv_intel_lvds_enc_funcs, 632 DRM_MODE_ENCODER_LVDS, NULL); 633 634 635 gma_connector_attach_encoder(gma_connector, gma_encoder); 636 gma_encoder->type = INTEL_OUTPUT_LVDS; 637 638 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs); 639 drm_connector_helper_add(connector, 640 &cdv_intel_lvds_connector_helper_funcs); 641 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 642 connector->interlace_allowed = false; 643 connector->doublescan_allowed = false; 644 645 /*Attach connector properties*/ 646 drm_object_attach_property(&connector->base, 647 dev->mode_config.scaling_mode_property, 648 DRM_MODE_SCALE_FULLSCREEN); 649 drm_object_attach_property(&connector->base, 650 dev_priv->backlight_property, 651 BRIGHTNESS_MAX_LEVEL); 652 653 /** 654 * Set up I2C bus 655 * FIXME: distroy i2c_bus when exit 656 */ 657 gma_encoder->i2c_bus = psb_intel_i2c_create(dev, 658 GPIOB, 659 "LVDSBLC_B"); 660 if (!gma_encoder->i2c_bus) { 661 dev_printk(KERN_ERR, 662 &dev->pdev->dev, "I2C bus registration failed.\n"); 663 goto failed_blc_i2c; 664 } 665 gma_encoder->i2c_bus->slave_addr = 0x2C; 666 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus; 667 668 /* 669 * LVDS discovery: 670 * 1) check for EDID on DDC 671 * 2) check for VBT data 672 * 3) check to see if LVDS is already on 673 * if none of the above, no panel 674 * 4) make sure lid is open 675 * if closed, act like it's not there for now 676 */ 677 678 /* Set up the DDC bus. */ 679 gma_encoder->ddc_bus = psb_intel_i2c_create(dev, 680 GPIOC, 681 "LVDSDDC_C"); 682 if (!gma_encoder->ddc_bus) { 683 dev_printk(KERN_ERR, &dev->pdev->dev, 684 "DDC bus registration " "failed.\n"); 685 goto failed_ddc; 686 } 687 688 /* 689 * Attempt to get the fixed panel mode from DDC. Assume that the 690 * preferred mode is the right one. 691 */ 692 mutex_lock(&dev->mode_config.mutex); 693 psb_intel_ddc_get_modes(connector, 694 &gma_encoder->ddc_bus->adapter); 695 list_for_each_entry(scan, &connector->probed_modes, head) { 696 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 697 mode_dev->panel_fixed_mode = 698 drm_mode_duplicate(dev, scan); 699 goto out; /* FIXME: check for quirks */ 700 } 701 } 702 703 /* Failed to get EDID, what about VBT? do we need this?*/ 704 if (dev_priv->lfp_lvds_vbt_mode) { 705 mode_dev->panel_fixed_mode = 706 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 707 if (mode_dev->panel_fixed_mode) { 708 mode_dev->panel_fixed_mode->type |= 709 DRM_MODE_TYPE_PREFERRED; 710 goto out; /* FIXME: check for quirks */ 711 } 712 } 713 /* 714 * If we didn't get EDID, try checking if the panel is already turned 715 * on. If so, assume that whatever is currently programmed is the 716 * correct mode. 717 */ 718 lvds = REG_READ(LVDS); 719 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 720 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 721 722 if (crtc && (lvds & LVDS_PORT_EN)) { 723 mode_dev->panel_fixed_mode = 724 cdv_intel_crtc_mode_get(dev, crtc); 725 if (mode_dev->panel_fixed_mode) { 726 mode_dev->panel_fixed_mode->type |= 727 DRM_MODE_TYPE_PREFERRED; 728 goto out; /* FIXME: check for quirks */ 729 } 730 } 731 732 /* If we still don't have a mode after all that, give up. */ 733 if (!mode_dev->panel_fixed_mode) { 734 DRM_DEBUG 735 ("Found no modes on the lvds, ignoring the LVDS\n"); 736 goto failed_find; 737 } 738 739 /* setup PWM */ 740 { 741 u32 pwm; 742 743 pwm = REG_READ(BLC_PWM_CTL2); 744 if (pipe == 1) 745 pwm |= PWM_PIPE_B; 746 else 747 pwm &= ~PWM_PIPE_B; 748 pwm |= PWM_ENABLE; 749 REG_WRITE(BLC_PWM_CTL2, pwm); 750 } 751 752 out: 753 mutex_unlock(&dev->mode_config.mutex); 754 drm_connector_register(connector); 755 return; 756 757 failed_find: 758 mutex_unlock(&dev->mode_config.mutex); 759 printk(KERN_ERR "Failed find\n"); 760 psb_intel_i2c_destroy(gma_encoder->ddc_bus); 761 failed_ddc: 762 printk(KERN_ERR "Failed DDC\n"); 763 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 764 failed_blc_i2c: 765 printk(KERN_ERR "Failed BLC\n"); 766 drm_encoder_cleanup(encoder); 767 drm_connector_cleanup(connector); 768 kfree(lvds_priv); 769 failed_lvds_priv: 770 kfree(gma_connector); 771 failed_connector: 772 kfree(gma_encoder); 773 } 774