1 /* 2 * Copyright © 2006-2007 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 <drm/drmP.h> 25 26 #include "intel_bios.h" 27 #include "psb_drv.h" 28 #include "psb_intel_drv.h" 29 #include "psb_intel_reg.h" 30 #include "power.h" 31 #include <linux/pm_runtime.h> 32 33 /* 34 * LVDS I2C backlight control macros 35 */ 36 #define BRIGHTNESS_MAX_LEVEL 100 37 #define BRIGHTNESS_MASK 0xFF 38 #define BLC_I2C_TYPE 0x01 39 #define BLC_PWM_TYPT 0x02 40 41 #define BLC_POLARITY_NORMAL 0 42 #define BLC_POLARITY_INVERSE 1 43 44 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 45 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 46 #define PSB_BLC_PWM_PRECISION_FACTOR (10) 47 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 48 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 49 50 struct psb_intel_lvds_priv { 51 /* 52 * Saved LVDO output states 53 */ 54 uint32_t savePP_ON; 55 uint32_t savePP_OFF; 56 uint32_t saveLVDS; 57 uint32_t savePP_CONTROL; 58 uint32_t savePP_CYCLE; 59 uint32_t savePFIT_CONTROL; 60 uint32_t savePFIT_PGM_RATIOS; 61 uint32_t saveBLC_PWM_CTL; 62 63 struct psb_intel_i2c_chan *i2c_bus; 64 struct psb_intel_i2c_chan *ddc_bus; 65 }; 66 67 68 /* 69 * Returns the maximum level of the backlight duty cycle field. 70 */ 71 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev) 72 { 73 struct drm_psb_private *dev_priv = dev->dev_private; 74 u32 ret; 75 76 if (gma_power_begin(dev, false)) { 77 ret = REG_READ(BLC_PWM_CTL); 78 gma_power_end(dev); 79 } else /* Powered off, use the saved value */ 80 ret = dev_priv->regs.saveBLC_PWM_CTL; 81 82 /* Top 15bits hold the frequency mask */ 83 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >> 84 BACKLIGHT_MODULATION_FREQ_SHIFT; 85 86 ret *= 2; /* Return a 16bit range as needed for setting */ 87 if (ret == 0) 88 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n", 89 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL); 90 return ret; 91 } 92 93 /* 94 * Set LVDS backlight level by I2C command 95 * 96 * FIXME: at some point we need to both track this for PM and also 97 * disable runtime pm on MRST if the brightness is nil (ie blanked) 98 */ 99 static int psb_lvds_i2c_set_brightness(struct drm_device *dev, 100 unsigned int level) 101 { 102 struct drm_psb_private *dev_priv = 103 (struct drm_psb_private *)dev->dev_private; 104 105 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 106 u8 out_buf[2]; 107 unsigned int blc_i2c_brightness; 108 109 struct i2c_msg msgs[] = { 110 { 111 .addr = lvds_i2c_bus->slave_addr, 112 .flags = 0, 113 .len = 2, 114 .buf = out_buf, 115 } 116 }; 117 118 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 119 BRIGHTNESS_MASK / 120 BRIGHTNESS_MAX_LEVEL); 121 122 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 123 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 124 125 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 126 out_buf[1] = (u8)blc_i2c_brightness; 127 128 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) { 129 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n", 130 dev_priv->lvds_bl->brightnesscmd, 131 blc_i2c_brightness); 132 return 0; 133 } 134 135 dev_err(dev->dev, "I2C transfer error\n"); 136 return -1; 137 } 138 139 140 static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level) 141 { 142 struct drm_psb_private *dev_priv = 143 (struct drm_psb_private *)dev->dev_private; 144 145 u32 max_pwm_blc; 146 u32 blc_pwm_duty_cycle; 147 148 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev); 149 150 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 151 BUG_ON(max_pwm_blc == 0); 152 153 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 154 155 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 156 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 157 158 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 159 REG_WRITE(BLC_PWM_CTL, 160 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 161 (blc_pwm_duty_cycle)); 162 163 dev_info(dev->dev, "Backlight lvds set brightness %08x\n", 164 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 165 (blc_pwm_duty_cycle)); 166 167 return 0; 168 } 169 170 /* 171 * Set LVDS backlight level either by I2C or PWM 172 */ 173 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level) 174 { 175 struct drm_psb_private *dev_priv = dev->dev_private; 176 177 dev_dbg(dev->dev, "backlight level is %d\n", level); 178 179 if (!dev_priv->lvds_bl) { 180 dev_err(dev->dev, "NO LVDS backlight info\n"); 181 return; 182 } 183 184 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 185 psb_lvds_i2c_set_brightness(dev, level); 186 else 187 psb_lvds_pwm_set_brightness(dev, level); 188 } 189 190 /* 191 * Sets the backlight level. 192 * 193 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight(). 194 */ 195 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level) 196 { 197 struct drm_psb_private *dev_priv = dev->dev_private; 198 u32 blc_pwm_ctl; 199 200 if (gma_power_begin(dev, false)) { 201 blc_pwm_ctl = REG_READ(BLC_PWM_CTL); 202 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; 203 REG_WRITE(BLC_PWM_CTL, 204 (blc_pwm_ctl | 205 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 206 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 207 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 208 gma_power_end(dev); 209 } else { 210 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 211 ~BACKLIGHT_DUTY_CYCLE_MASK; 212 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 213 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 214 } 215 } 216 217 /* 218 * Sets the power state for the panel. 219 */ 220 static void psb_intel_lvds_set_power(struct drm_device *dev, bool on) 221 { 222 struct drm_psb_private *dev_priv = dev->dev_private; 223 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 224 u32 pp_status; 225 226 if (!gma_power_begin(dev, true)) { 227 dev_err(dev->dev, "set power, chip off!\n"); 228 return; 229 } 230 231 if (on) { 232 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 233 POWER_TARGET_ON); 234 do { 235 pp_status = REG_READ(PP_STATUS); 236 } while ((pp_status & PP_ON) == 0); 237 238 psb_intel_lvds_set_backlight(dev, 239 mode_dev->backlight_duty_cycle); 240 } else { 241 psb_intel_lvds_set_backlight(dev, 0); 242 243 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 244 ~POWER_TARGET_ON); 245 do { 246 pp_status = REG_READ(PP_STATUS); 247 } while (pp_status & PP_ON); 248 } 249 250 gma_power_end(dev); 251 } 252 253 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 254 { 255 struct drm_device *dev = encoder->dev; 256 257 if (mode == DRM_MODE_DPMS_ON) 258 psb_intel_lvds_set_power(dev, true); 259 else 260 psb_intel_lvds_set_power(dev, false); 261 262 /* XXX: We never power down the LVDS pairs. */ 263 } 264 265 static void psb_intel_lvds_save(struct drm_connector *connector) 266 { 267 struct drm_device *dev = connector->dev; 268 struct drm_psb_private *dev_priv = 269 (struct drm_psb_private *)dev->dev_private; 270 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 271 struct psb_intel_lvds_priv *lvds_priv = 272 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 273 274 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON); 275 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF); 276 lvds_priv->saveLVDS = REG_READ(LVDS); 277 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL); 278 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE); 279 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/ 280 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 281 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL); 282 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS); 283 284 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/ 285 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL & 286 BACKLIGHT_DUTY_CYCLE_MASK); 287 288 /* 289 * If the light is off at server startup, 290 * just make it full brightness 291 */ 292 if (dev_priv->backlight_duty_cycle == 0) 293 dev_priv->backlight_duty_cycle = 294 psb_intel_lvds_get_max_backlight(dev); 295 296 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 297 lvds_priv->savePP_ON, 298 lvds_priv->savePP_OFF, 299 lvds_priv->saveLVDS, 300 lvds_priv->savePP_CONTROL, 301 lvds_priv->savePP_CYCLE, 302 lvds_priv->saveBLC_PWM_CTL); 303 } 304 305 static void psb_intel_lvds_restore(struct drm_connector *connector) 306 { 307 struct drm_device *dev = connector->dev; 308 u32 pp_status; 309 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 310 struct psb_intel_lvds_priv *lvds_priv = 311 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 312 313 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 314 lvds_priv->savePP_ON, 315 lvds_priv->savePP_OFF, 316 lvds_priv->saveLVDS, 317 lvds_priv->savePP_CONTROL, 318 lvds_priv->savePP_CYCLE, 319 lvds_priv->saveBLC_PWM_CTL); 320 321 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL); 322 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL); 323 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS); 324 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON); 325 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF); 326 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/ 327 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE); 328 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL); 329 REG_WRITE(LVDS, lvds_priv->saveLVDS); 330 331 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) { 332 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 333 POWER_TARGET_ON); 334 do { 335 pp_status = REG_READ(PP_STATUS); 336 } while ((pp_status & PP_ON) == 0); 337 } else { 338 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 339 ~POWER_TARGET_ON); 340 do { 341 pp_status = REG_READ(PP_STATUS); 342 } while (pp_status & PP_ON); 343 } 344 } 345 346 enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector, 347 struct drm_display_mode *mode) 348 { 349 struct drm_psb_private *dev_priv = connector->dev->dev_private; 350 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 351 struct drm_display_mode *fixed_mode = 352 dev_priv->mode_dev.panel_fixed_mode; 353 354 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 355 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2; 356 357 /* just in case */ 358 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 359 return MODE_NO_DBLESCAN; 360 361 /* just in case */ 362 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 363 return MODE_NO_INTERLACE; 364 365 if (fixed_mode) { 366 if (mode->hdisplay > fixed_mode->hdisplay) 367 return MODE_PANEL; 368 if (mode->vdisplay > fixed_mode->vdisplay) 369 return MODE_PANEL; 370 } 371 return MODE_OK; 372 } 373 374 bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder, 375 const struct drm_display_mode *mode, 376 struct drm_display_mode *adjusted_mode) 377 { 378 struct drm_device *dev = encoder->dev; 379 struct drm_psb_private *dev_priv = dev->dev_private; 380 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 381 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 382 struct drm_encoder *tmp_encoder; 383 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 384 struct gma_encoder *gma_encoder = to_gma_encoder(encoder); 385 386 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 387 panel_fixed_mode = mode_dev->panel_fixed_mode2; 388 389 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */ 390 if (!IS_MRST(dev) && gma_crtc->pipe == 0) { 391 pr_err("Can't support LVDS on pipe A\n"); 392 return false; 393 } 394 if (IS_MRST(dev) && gma_crtc->pipe != 0) { 395 pr_err("Must use PIPE A\n"); 396 return false; 397 } 398 /* Should never happen!! */ 399 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 400 head) { 401 if (tmp_encoder != encoder 402 && tmp_encoder->crtc == encoder->crtc) { 403 pr_err("Can't enable LVDS and another encoder on the same pipe\n"); 404 return false; 405 } 406 } 407 408 /* 409 * If we have timings from the BIOS for the panel, put them in 410 * to the adjusted mode. The CRTC will be set up for this mode, 411 * with the panel scaling set up to source from the H/VDisplay 412 * of the original mode. 413 */ 414 if (panel_fixed_mode != NULL) { 415 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 416 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 417 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 418 adjusted_mode->htotal = panel_fixed_mode->htotal; 419 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 420 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 421 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 422 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 423 adjusted_mode->clock = panel_fixed_mode->clock; 424 drm_mode_set_crtcinfo(adjusted_mode, 425 CRTC_INTERLACE_HALVE_V); 426 } 427 428 /* 429 * XXX: It would be nice to support lower refresh rates on the 430 * panels to reduce power consumption, and perhaps match the 431 * user's requested refresh rate. 432 */ 433 434 return true; 435 } 436 437 static void psb_intel_lvds_prepare(struct drm_encoder *encoder) 438 { 439 struct drm_device *dev = encoder->dev; 440 struct drm_psb_private *dev_priv = dev->dev_private; 441 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 442 443 if (!gma_power_begin(dev, true)) 444 return; 445 446 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 447 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 448 BACKLIGHT_DUTY_CYCLE_MASK); 449 450 psb_intel_lvds_set_power(dev, false); 451 452 gma_power_end(dev); 453 } 454 455 static void psb_intel_lvds_commit(struct drm_encoder *encoder) 456 { 457 struct drm_device *dev = encoder->dev; 458 struct drm_psb_private *dev_priv = dev->dev_private; 459 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 460 461 if (mode_dev->backlight_duty_cycle == 0) 462 mode_dev->backlight_duty_cycle = 463 psb_intel_lvds_get_max_backlight(dev); 464 465 psb_intel_lvds_set_power(dev, true); 466 } 467 468 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder, 469 struct drm_display_mode *mode, 470 struct drm_display_mode *adjusted_mode) 471 { 472 struct drm_device *dev = encoder->dev; 473 struct drm_psb_private *dev_priv = dev->dev_private; 474 u32 pfit_control; 475 476 /* 477 * The LVDS pin pair will already have been turned on in the 478 * psb_intel_crtc_mode_set since it has a large impact on the DPLL 479 * settings. 480 */ 481 482 /* 483 * Enable automatic panel scaling so that non-native modes fill the 484 * screen. Should be enabled before the pipe is enabled, according to 485 * register description and PRM. 486 */ 487 if (mode->hdisplay != adjusted_mode->hdisplay || 488 mode->vdisplay != adjusted_mode->vdisplay) 489 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 490 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 491 HORIZ_INTERP_BILINEAR); 492 else 493 pfit_control = 0; 494 495 if (dev_priv->lvds_dither) 496 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 497 498 REG_WRITE(PFIT_CONTROL, pfit_control); 499 } 500 501 /* 502 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 503 */ 504 static int psb_intel_lvds_get_modes(struct drm_connector *connector) 505 { 506 struct drm_device *dev = connector->dev; 507 struct drm_psb_private *dev_priv = dev->dev_private; 508 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 509 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 510 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv; 511 int ret = 0; 512 513 if (!IS_MRST(dev)) 514 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter); 515 516 if (ret) 517 return ret; 518 519 if (mode_dev->panel_fixed_mode != NULL) { 520 struct drm_display_mode *mode = 521 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 522 drm_mode_probed_add(connector, mode); 523 return 1; 524 } 525 526 return 0; 527 } 528 529 /** 530 * psb_intel_lvds_destroy - unregister and free LVDS structures 531 * @connector: connector to free 532 * 533 * Unregister the DDC bus for this connector then free the driver private 534 * structure. 535 */ 536 void psb_intel_lvds_destroy(struct drm_connector *connector) 537 { 538 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 539 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv; 540 541 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 542 drm_connector_unregister(connector); 543 drm_connector_cleanup(connector); 544 kfree(connector); 545 } 546 547 int psb_intel_lvds_set_property(struct drm_connector *connector, 548 struct drm_property *property, 549 uint64_t value) 550 { 551 struct drm_encoder *encoder = connector->encoder; 552 553 if (!encoder) 554 return -1; 555 556 if (!strcmp(property->name, "scaling mode")) { 557 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 558 uint64_t curval; 559 560 if (!crtc) 561 goto set_prop_error; 562 563 switch (value) { 564 case DRM_MODE_SCALE_FULLSCREEN: 565 break; 566 case DRM_MODE_SCALE_NO_SCALE: 567 break; 568 case DRM_MODE_SCALE_ASPECT: 569 break; 570 default: 571 goto set_prop_error; 572 } 573 574 if (drm_object_property_get_value(&connector->base, 575 property, 576 &curval)) 577 goto set_prop_error; 578 579 if (curval == value) 580 goto set_prop_done; 581 582 if (drm_object_property_set_value(&connector->base, 583 property, 584 value)) 585 goto set_prop_error; 586 587 if (crtc->saved_mode.hdisplay != 0 && 588 crtc->saved_mode.vdisplay != 0) { 589 if (!drm_crtc_helper_set_mode(encoder->crtc, 590 &crtc->saved_mode, 591 encoder->crtc->x, 592 encoder->crtc->y, 593 encoder->crtc->primary->fb)) 594 goto set_prop_error; 595 } 596 } else if (!strcmp(property->name, "backlight")) { 597 if (drm_object_property_set_value(&connector->base, 598 property, 599 value)) 600 goto set_prop_error; 601 else 602 gma_backlight_set(encoder->dev, value); 603 } else if (!strcmp(property->name, "DPMS")) { 604 const struct drm_encoder_helper_funcs *hfuncs 605 = encoder->helper_private; 606 hfuncs->dpms(encoder, value); 607 } 608 609 set_prop_done: 610 return 0; 611 set_prop_error: 612 return -1; 613 } 614 615 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { 616 .dpms = psb_intel_lvds_encoder_dpms, 617 .mode_fixup = psb_intel_lvds_mode_fixup, 618 .prepare = psb_intel_lvds_prepare, 619 .mode_set = psb_intel_lvds_mode_set, 620 .commit = psb_intel_lvds_commit, 621 }; 622 623 const struct drm_connector_helper_funcs 624 psb_intel_lvds_connector_helper_funcs = { 625 .get_modes = psb_intel_lvds_get_modes, 626 .mode_valid = psb_intel_lvds_mode_valid, 627 .best_encoder = gma_best_encoder, 628 }; 629 630 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { 631 .dpms = drm_helper_connector_dpms, 632 .fill_modes = drm_helper_probe_single_connector_modes, 633 .set_property = psb_intel_lvds_set_property, 634 .destroy = psb_intel_lvds_destroy, 635 }; 636 637 638 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder) 639 { 640 drm_encoder_cleanup(encoder); 641 } 642 643 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = { 644 .destroy = psb_intel_lvds_enc_destroy, 645 }; 646 647 648 649 /** 650 * psb_intel_lvds_init - setup LVDS connectors on this device 651 * @dev: drm device 652 * 653 * Create the connector, register the LVDS DDC bus, and try to figure out what 654 * modes we can display on the LVDS panel (if present). 655 */ 656 void psb_intel_lvds_init(struct drm_device *dev, 657 struct psb_intel_mode_device *mode_dev) 658 { 659 struct gma_encoder *gma_encoder; 660 struct gma_connector *gma_connector; 661 struct psb_intel_lvds_priv *lvds_priv; 662 struct drm_connector *connector; 663 struct drm_encoder *encoder; 664 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 665 struct drm_crtc *crtc; 666 struct drm_psb_private *dev_priv = dev->dev_private; 667 u32 lvds; 668 int pipe; 669 670 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 671 if (!gma_encoder) { 672 dev_err(dev->dev, "gma_encoder allocation error\n"); 673 return; 674 } 675 676 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 677 if (!gma_connector) { 678 dev_err(dev->dev, "gma_connector allocation error\n"); 679 goto failed_encoder; 680 } 681 682 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); 683 if (!lvds_priv) { 684 dev_err(dev->dev, "LVDS private allocation error\n"); 685 goto failed_connector; 686 } 687 688 gma_encoder->dev_priv = lvds_priv; 689 690 connector = &gma_connector->base; 691 gma_connector->save = psb_intel_lvds_save; 692 gma_connector->restore = psb_intel_lvds_restore; 693 694 encoder = &gma_encoder->base; 695 drm_connector_init(dev, connector, 696 &psb_intel_lvds_connector_funcs, 697 DRM_MODE_CONNECTOR_LVDS); 698 699 drm_encoder_init(dev, encoder, 700 &psb_intel_lvds_enc_funcs, 701 DRM_MODE_ENCODER_LVDS, NULL); 702 703 gma_connector_attach_encoder(gma_connector, gma_encoder); 704 gma_encoder->type = INTEL_OUTPUT_LVDS; 705 706 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); 707 drm_connector_helper_add(connector, 708 &psb_intel_lvds_connector_helper_funcs); 709 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 710 connector->interlace_allowed = false; 711 connector->doublescan_allowed = false; 712 713 /*Attach connector properties*/ 714 drm_object_attach_property(&connector->base, 715 dev->mode_config.scaling_mode_property, 716 DRM_MODE_SCALE_FULLSCREEN); 717 drm_object_attach_property(&connector->base, 718 dev_priv->backlight_property, 719 BRIGHTNESS_MAX_LEVEL); 720 721 /* 722 * Set up I2C bus 723 * FIXME: distroy i2c_bus when exit 724 */ 725 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B"); 726 if (!lvds_priv->i2c_bus) { 727 dev_printk(KERN_ERR, 728 &dev->pdev->dev, "I2C bus registration failed.\n"); 729 goto failed_blc_i2c; 730 } 731 lvds_priv->i2c_bus->slave_addr = 0x2C; 732 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; 733 734 /* 735 * LVDS discovery: 736 * 1) check for EDID on DDC 737 * 2) check for VBT data 738 * 3) check to see if LVDS is already on 739 * if none of the above, no panel 740 * 4) make sure lid is open 741 * if closed, act like it's not there for now 742 */ 743 744 /* Set up the DDC bus. */ 745 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); 746 if (!lvds_priv->ddc_bus) { 747 dev_printk(KERN_ERR, &dev->pdev->dev, 748 "DDC bus registration " "failed.\n"); 749 goto failed_ddc; 750 } 751 752 /* 753 * Attempt to get the fixed panel mode from DDC. Assume that the 754 * preferred mode is the right one. 755 */ 756 mutex_lock(&dev->mode_config.mutex); 757 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter); 758 list_for_each_entry(scan, &connector->probed_modes, head) { 759 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 760 mode_dev->panel_fixed_mode = 761 drm_mode_duplicate(dev, scan); 762 DRM_DEBUG_KMS("Using mode from DDC\n"); 763 goto out; /* FIXME: check for quirks */ 764 } 765 } 766 767 /* Failed to get EDID, what about VBT? do we need this? */ 768 if (dev_priv->lfp_lvds_vbt_mode) { 769 mode_dev->panel_fixed_mode = 770 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 771 772 if (mode_dev->panel_fixed_mode) { 773 mode_dev->panel_fixed_mode->type |= 774 DRM_MODE_TYPE_PREFERRED; 775 DRM_DEBUG_KMS("Using mode from VBT\n"); 776 goto out; 777 } 778 } 779 780 /* 781 * If we didn't get EDID, try checking if the panel is already turned 782 * on. If so, assume that whatever is currently programmed is the 783 * correct mode. 784 */ 785 lvds = REG_READ(LVDS); 786 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 787 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 788 789 if (crtc && (lvds & LVDS_PORT_EN)) { 790 mode_dev->panel_fixed_mode = 791 psb_intel_crtc_mode_get(dev, crtc); 792 if (mode_dev->panel_fixed_mode) { 793 mode_dev->panel_fixed_mode->type |= 794 DRM_MODE_TYPE_PREFERRED; 795 DRM_DEBUG_KMS("Using pre-programmed mode\n"); 796 goto out; /* FIXME: check for quirks */ 797 } 798 } 799 800 /* If we still don't have a mode after all that, give up. */ 801 if (!mode_dev->panel_fixed_mode) { 802 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); 803 goto failed_find; 804 } 805 806 /* 807 * Blacklist machines with BIOSes that list an LVDS panel without 808 * actually having one. 809 */ 810 out: 811 mutex_unlock(&dev->mode_config.mutex); 812 drm_connector_register(connector); 813 return; 814 815 failed_find: 816 mutex_unlock(&dev->mode_config.mutex); 817 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 818 failed_ddc: 819 psb_intel_i2c_destroy(lvds_priv->i2c_bus); 820 failed_blc_i2c: 821 drm_encoder_cleanup(encoder); 822 drm_connector_cleanup(connector); 823 failed_connector: 824 kfree(gma_connector); 825 failed_encoder: 826 kfree(gma_encoder); 827 } 828 829