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 * Detect the LVDS connection. 391 * 392 * This always returns CONNECTOR_STATUS_CONNECTED. 393 * This connector should only have 394 * been set up if the LVDS was actually connected anyway. 395 */ 396 static enum drm_connector_status cdv_intel_lvds_detect( 397 struct drm_connector *connector, bool force) 398 { 399 return connector_status_connected; 400 } 401 402 /** 403 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 404 */ 405 static int cdv_intel_lvds_get_modes(struct drm_connector *connector) 406 { 407 struct drm_device *dev = connector->dev; 408 struct drm_psb_private *dev_priv = dev->dev_private; 409 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 410 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 411 int ret; 412 413 ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->adapter); 414 415 if (ret) 416 return ret; 417 418 /* Didn't get an EDID, so 419 * Set wide sync ranges so we get all modes 420 * handed to valid_mode for checking 421 */ 422 connector->display_info.min_vfreq = 0; 423 connector->display_info.max_vfreq = 200; 424 connector->display_info.min_hfreq = 0; 425 connector->display_info.max_hfreq = 200; 426 if (mode_dev->panel_fixed_mode != NULL) { 427 struct drm_display_mode *mode = 428 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 429 drm_mode_probed_add(connector, mode); 430 return 1; 431 } 432 433 return 0; 434 } 435 436 /** 437 * cdv_intel_lvds_destroy - unregister and free LVDS structures 438 * @connector: connector to free 439 * 440 * Unregister the DDC bus for this connector then free the driver private 441 * structure. 442 */ 443 static void cdv_intel_lvds_destroy(struct drm_connector *connector) 444 { 445 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 446 447 if (gma_encoder->i2c_bus) 448 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 449 drm_connector_unregister(connector); 450 drm_connector_cleanup(connector); 451 kfree(connector); 452 } 453 454 static int cdv_intel_lvds_set_property(struct drm_connector *connector, 455 struct drm_property *property, 456 uint64_t value) 457 { 458 struct drm_encoder *encoder = connector->encoder; 459 460 if (!strcmp(property->name, "scaling mode") && encoder) { 461 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 462 uint64_t curValue; 463 464 if (!crtc) 465 return -1; 466 467 switch (value) { 468 case DRM_MODE_SCALE_FULLSCREEN: 469 break; 470 case DRM_MODE_SCALE_NO_SCALE: 471 break; 472 case DRM_MODE_SCALE_ASPECT: 473 break; 474 default: 475 return -1; 476 } 477 478 if (drm_object_property_get_value(&connector->base, 479 property, 480 &curValue)) 481 return -1; 482 483 if (curValue == value) 484 return 0; 485 486 if (drm_object_property_set_value(&connector->base, 487 property, 488 value)) 489 return -1; 490 491 if (crtc->saved_mode.hdisplay != 0 && 492 crtc->saved_mode.vdisplay != 0) { 493 if (!drm_crtc_helper_set_mode(encoder->crtc, 494 &crtc->saved_mode, 495 encoder->crtc->x, 496 encoder->crtc->y, 497 encoder->crtc->primary->fb)) 498 return -1; 499 } 500 } else if (!strcmp(property->name, "backlight") && encoder) { 501 if (drm_object_property_set_value(&connector->base, 502 property, 503 value)) 504 return -1; 505 else 506 gma_backlight_set(encoder->dev, value); 507 } else if (!strcmp(property->name, "DPMS") && encoder) { 508 struct drm_encoder_helper_funcs *helpers = 509 encoder->helper_private; 510 helpers->dpms(encoder, value); 511 } 512 return 0; 513 } 514 515 static const struct drm_encoder_helper_funcs 516 cdv_intel_lvds_helper_funcs = { 517 .dpms = cdv_intel_lvds_encoder_dpms, 518 .mode_fixup = cdv_intel_lvds_mode_fixup, 519 .prepare = cdv_intel_lvds_prepare, 520 .mode_set = cdv_intel_lvds_mode_set, 521 .commit = cdv_intel_lvds_commit, 522 }; 523 524 static const struct drm_connector_helper_funcs 525 cdv_intel_lvds_connector_helper_funcs = { 526 .get_modes = cdv_intel_lvds_get_modes, 527 .mode_valid = cdv_intel_lvds_mode_valid, 528 .best_encoder = gma_best_encoder, 529 }; 530 531 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = { 532 .dpms = drm_helper_connector_dpms, 533 .save = cdv_intel_lvds_save, 534 .restore = cdv_intel_lvds_restore, 535 .detect = cdv_intel_lvds_detect, 536 .fill_modes = drm_helper_probe_single_connector_modes, 537 .set_property = cdv_intel_lvds_set_property, 538 .destroy = cdv_intel_lvds_destroy, 539 }; 540 541 542 static void cdv_intel_lvds_enc_destroy(struct drm_encoder *encoder) 543 { 544 drm_encoder_cleanup(encoder); 545 } 546 547 static const struct drm_encoder_funcs cdv_intel_lvds_enc_funcs = { 548 .destroy = cdv_intel_lvds_enc_destroy, 549 }; 550 551 /* 552 * Enumerate the child dev array parsed from VBT to check whether 553 * the LVDS is present. 554 * If it is present, return 1. 555 * If it is not present, return false. 556 * If no child dev is parsed from VBT, it assumes that the LVDS is present. 557 */ 558 static bool lvds_is_present_in_vbt(struct drm_device *dev, 559 u8 *i2c_pin) 560 { 561 struct drm_psb_private *dev_priv = dev->dev_private; 562 int i; 563 564 if (!dev_priv->child_dev_num) 565 return true; 566 567 for (i = 0; i < dev_priv->child_dev_num; i++) { 568 struct child_device_config *child = dev_priv->child_dev + i; 569 570 /* If the device type is not LFP, continue. 571 * We have to check both the new identifiers as well as the 572 * old for compatibility with some BIOSes. 573 */ 574 if (child->device_type != DEVICE_TYPE_INT_LFP && 575 child->device_type != DEVICE_TYPE_LFP) 576 continue; 577 578 if (child->i2c_pin) 579 *i2c_pin = child->i2c_pin; 580 581 /* However, we cannot trust the BIOS writers to populate 582 * the VBT correctly. Since LVDS requires additional 583 * information from AIM blocks, a non-zero addin offset is 584 * a good indicator that the LVDS is actually present. 585 */ 586 if (child->addin_offset) 587 return true; 588 589 /* But even then some BIOS writers perform some black magic 590 * and instantiate the device without reference to any 591 * additional data. Trust that if the VBT was written into 592 * the OpRegion then they have validated the LVDS's existence. 593 */ 594 if (dev_priv->opregion.vbt) 595 return true; 596 } 597 598 return false; 599 } 600 601 /** 602 * cdv_intel_lvds_init - setup LVDS connectors on this device 603 * @dev: drm device 604 * 605 * Create the connector, register the LVDS DDC bus, and try to figure out what 606 * modes we can display on the LVDS panel (if present). 607 */ 608 void cdv_intel_lvds_init(struct drm_device *dev, 609 struct psb_intel_mode_device *mode_dev) 610 { 611 struct gma_encoder *gma_encoder; 612 struct gma_connector *gma_connector; 613 struct cdv_intel_lvds_priv *lvds_priv; 614 struct drm_connector *connector; 615 struct drm_encoder *encoder; 616 struct drm_display_mode *scan; 617 struct drm_crtc *crtc; 618 struct drm_psb_private *dev_priv = dev->dev_private; 619 u32 lvds; 620 int pipe; 621 u8 pin; 622 623 pin = GMBUS_PORT_PANEL; 624 if (!lvds_is_present_in_vbt(dev, &pin)) { 625 DRM_DEBUG_KMS("LVDS is not present in VBT\n"); 626 return; 627 } 628 629 gma_encoder = kzalloc(sizeof(struct gma_encoder), 630 GFP_KERNEL); 631 if (!gma_encoder) 632 return; 633 634 gma_connector = kzalloc(sizeof(struct gma_connector), 635 GFP_KERNEL); 636 if (!gma_connector) 637 goto failed_connector; 638 639 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL); 640 if (!lvds_priv) 641 goto failed_lvds_priv; 642 643 gma_encoder->dev_priv = lvds_priv; 644 645 connector = &gma_connector->base; 646 encoder = &gma_encoder->base; 647 648 649 drm_connector_init(dev, connector, 650 &cdv_intel_lvds_connector_funcs, 651 DRM_MODE_CONNECTOR_LVDS); 652 653 drm_encoder_init(dev, encoder, 654 &cdv_intel_lvds_enc_funcs, 655 DRM_MODE_ENCODER_LVDS); 656 657 658 gma_connector_attach_encoder(gma_connector, gma_encoder); 659 gma_encoder->type = INTEL_OUTPUT_LVDS; 660 661 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs); 662 drm_connector_helper_add(connector, 663 &cdv_intel_lvds_connector_helper_funcs); 664 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 665 connector->interlace_allowed = false; 666 connector->doublescan_allowed = false; 667 668 /*Attach connector properties*/ 669 drm_object_attach_property(&connector->base, 670 dev->mode_config.scaling_mode_property, 671 DRM_MODE_SCALE_FULLSCREEN); 672 drm_object_attach_property(&connector->base, 673 dev_priv->backlight_property, 674 BRIGHTNESS_MAX_LEVEL); 675 676 /** 677 * Set up I2C bus 678 * FIXME: distroy i2c_bus when exit 679 */ 680 gma_encoder->i2c_bus = psb_intel_i2c_create(dev, 681 GPIOB, 682 "LVDSBLC_B"); 683 if (!gma_encoder->i2c_bus) { 684 dev_printk(KERN_ERR, 685 &dev->pdev->dev, "I2C bus registration failed.\n"); 686 goto failed_blc_i2c; 687 } 688 gma_encoder->i2c_bus->slave_addr = 0x2C; 689 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus; 690 691 /* 692 * LVDS discovery: 693 * 1) check for EDID on DDC 694 * 2) check for VBT data 695 * 3) check to see if LVDS is already on 696 * if none of the above, no panel 697 * 4) make sure lid is open 698 * if closed, act like it's not there for now 699 */ 700 701 /* Set up the DDC bus. */ 702 gma_encoder->ddc_bus = psb_intel_i2c_create(dev, 703 GPIOC, 704 "LVDSDDC_C"); 705 if (!gma_encoder->ddc_bus) { 706 dev_printk(KERN_ERR, &dev->pdev->dev, 707 "DDC bus registration " "failed.\n"); 708 goto failed_ddc; 709 } 710 711 /* 712 * Attempt to get the fixed panel mode from DDC. Assume that the 713 * preferred mode is the right one. 714 */ 715 mutex_lock(&dev->mode_config.mutex); 716 psb_intel_ddc_get_modes(connector, 717 &gma_encoder->ddc_bus->adapter); 718 list_for_each_entry(scan, &connector->probed_modes, head) { 719 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 720 mode_dev->panel_fixed_mode = 721 drm_mode_duplicate(dev, scan); 722 goto out; /* FIXME: check for quirks */ 723 } 724 } 725 726 /* Failed to get EDID, what about VBT? do we need this?*/ 727 if (dev_priv->lfp_lvds_vbt_mode) { 728 mode_dev->panel_fixed_mode = 729 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 730 if (mode_dev->panel_fixed_mode) { 731 mode_dev->panel_fixed_mode->type |= 732 DRM_MODE_TYPE_PREFERRED; 733 goto out; /* FIXME: check for quirks */ 734 } 735 } 736 /* 737 * If we didn't get EDID, try checking if the panel is already turned 738 * on. If so, assume that whatever is currently programmed is the 739 * correct mode. 740 */ 741 lvds = REG_READ(LVDS); 742 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 743 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 744 745 if (crtc && (lvds & LVDS_PORT_EN)) { 746 mode_dev->panel_fixed_mode = 747 cdv_intel_crtc_mode_get(dev, crtc); 748 if (mode_dev->panel_fixed_mode) { 749 mode_dev->panel_fixed_mode->type |= 750 DRM_MODE_TYPE_PREFERRED; 751 goto out; /* FIXME: check for quirks */ 752 } 753 } 754 755 /* If we still don't have a mode after all that, give up. */ 756 if (!mode_dev->panel_fixed_mode) { 757 DRM_DEBUG 758 ("Found no modes on the lvds, ignoring the LVDS\n"); 759 goto failed_find; 760 } 761 762 /* setup PWM */ 763 { 764 u32 pwm; 765 766 pwm = REG_READ(BLC_PWM_CTL2); 767 if (pipe == 1) 768 pwm |= PWM_PIPE_B; 769 else 770 pwm &= ~PWM_PIPE_B; 771 pwm |= PWM_ENABLE; 772 REG_WRITE(BLC_PWM_CTL2, pwm); 773 } 774 775 out: 776 mutex_unlock(&dev->mode_config.mutex); 777 drm_connector_register(connector); 778 return; 779 780 failed_find: 781 mutex_unlock(&dev->mode_config.mutex); 782 printk(KERN_ERR "Failed find\n"); 783 if (gma_encoder->ddc_bus) 784 psb_intel_i2c_destroy(gma_encoder->ddc_bus); 785 failed_ddc: 786 printk(KERN_ERR "Failed DDC\n"); 787 if (gma_encoder->i2c_bus) 788 psb_intel_i2c_destroy(gma_encoder->i2c_bus); 789 failed_blc_i2c: 790 printk(KERN_ERR "Failed BLC\n"); 791 drm_encoder_cleanup(encoder); 792 drm_connector_cleanup(connector); 793 kfree(lvds_priv); 794 failed_lvds_priv: 795 kfree(gma_connector); 796 failed_connector: 797 kfree(gma_encoder); 798 } 799