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 int 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 printk(KERN_ERR "Can't support LVDS on pipe A\n"); 392 return false; 393 } 394 if (IS_MRST(dev) && gma_crtc->pipe != 0) { 395 printk(KERN_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 printk(KERN_ERR "Can't enable LVDS and another " 404 "encoder on the same pipe\n"); 405 return false; 406 } 407 } 408 409 /* 410 * If we have timings from the BIOS for the panel, put them in 411 * to the adjusted mode. The CRTC will be set up for this mode, 412 * with the panel scaling set up to source from the H/VDisplay 413 * of the original mode. 414 */ 415 if (panel_fixed_mode != NULL) { 416 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 417 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 418 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 419 adjusted_mode->htotal = panel_fixed_mode->htotal; 420 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 421 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 422 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 423 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 424 adjusted_mode->clock = panel_fixed_mode->clock; 425 drm_mode_set_crtcinfo(adjusted_mode, 426 CRTC_INTERLACE_HALVE_V); 427 } 428 429 /* 430 * XXX: It would be nice to support lower refresh rates on the 431 * panels to reduce power consumption, and perhaps match the 432 * user's requested refresh rate. 433 */ 434 435 return true; 436 } 437 438 static void psb_intel_lvds_prepare(struct drm_encoder *encoder) 439 { 440 struct drm_device *dev = encoder->dev; 441 struct drm_psb_private *dev_priv = dev->dev_private; 442 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 443 444 if (!gma_power_begin(dev, true)) 445 return; 446 447 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 448 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 449 BACKLIGHT_DUTY_CYCLE_MASK); 450 451 psb_intel_lvds_set_power(dev, false); 452 453 gma_power_end(dev); 454 } 455 456 static void psb_intel_lvds_commit(struct drm_encoder *encoder) 457 { 458 struct drm_device *dev = encoder->dev; 459 struct drm_psb_private *dev_priv = dev->dev_private; 460 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 461 462 if (mode_dev->backlight_duty_cycle == 0) 463 mode_dev->backlight_duty_cycle = 464 psb_intel_lvds_get_max_backlight(dev); 465 466 psb_intel_lvds_set_power(dev, true); 467 } 468 469 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder, 470 struct drm_display_mode *mode, 471 struct drm_display_mode *adjusted_mode) 472 { 473 struct drm_device *dev = encoder->dev; 474 struct drm_psb_private *dev_priv = dev->dev_private; 475 u32 pfit_control; 476 477 /* 478 * The LVDS pin pair will already have been turned on in the 479 * psb_intel_crtc_mode_set since it has a large impact on the DPLL 480 * settings. 481 */ 482 483 /* 484 * Enable automatic panel scaling so that non-native modes fill the 485 * screen. Should be enabled before the pipe is enabled, according to 486 * register description and PRM. 487 */ 488 if (mode->hdisplay != adjusted_mode->hdisplay || 489 mode->vdisplay != adjusted_mode->vdisplay) 490 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 491 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 492 HORIZ_INTERP_BILINEAR); 493 else 494 pfit_control = 0; 495 496 if (dev_priv->lvds_dither) 497 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 498 499 REG_WRITE(PFIT_CONTROL, pfit_control); 500 } 501 502 /* 503 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 504 */ 505 static int psb_intel_lvds_get_modes(struct drm_connector *connector) 506 { 507 struct drm_device *dev = connector->dev; 508 struct drm_psb_private *dev_priv = dev->dev_private; 509 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 510 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 511 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv; 512 int ret = 0; 513 514 if (!IS_MRST(dev)) 515 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter); 516 517 if (ret) 518 return ret; 519 520 if (mode_dev->panel_fixed_mode != NULL) { 521 struct drm_display_mode *mode = 522 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 523 drm_mode_probed_add(connector, mode); 524 return 1; 525 } 526 527 return 0; 528 } 529 530 /** 531 * psb_intel_lvds_destroy - unregister and free LVDS structures 532 * @connector: connector to free 533 * 534 * Unregister the DDC bus for this connector then free the driver private 535 * structure. 536 */ 537 void psb_intel_lvds_destroy(struct drm_connector *connector) 538 { 539 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 540 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv; 541 542 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 543 drm_connector_unregister(connector); 544 drm_connector_cleanup(connector); 545 kfree(connector); 546 } 547 548 int psb_intel_lvds_set_property(struct drm_connector *connector, 549 struct drm_property *property, 550 uint64_t value) 551 { 552 struct drm_encoder *encoder = connector->encoder; 553 554 if (!encoder) 555 return -1; 556 557 if (!strcmp(property->name, "scaling mode")) { 558 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 559 uint64_t curval; 560 561 if (!crtc) 562 goto set_prop_error; 563 564 switch (value) { 565 case DRM_MODE_SCALE_FULLSCREEN: 566 break; 567 case DRM_MODE_SCALE_NO_SCALE: 568 break; 569 case DRM_MODE_SCALE_ASPECT: 570 break; 571 default: 572 goto set_prop_error; 573 } 574 575 if (drm_object_property_get_value(&connector->base, 576 property, 577 &curval)) 578 goto set_prop_error; 579 580 if (curval == value) 581 goto set_prop_done; 582 583 if (drm_object_property_set_value(&connector->base, 584 property, 585 value)) 586 goto set_prop_error; 587 588 if (crtc->saved_mode.hdisplay != 0 && 589 crtc->saved_mode.vdisplay != 0) { 590 if (!drm_crtc_helper_set_mode(encoder->crtc, 591 &crtc->saved_mode, 592 encoder->crtc->x, 593 encoder->crtc->y, 594 encoder->crtc->primary->fb)) 595 goto set_prop_error; 596 } 597 } else if (!strcmp(property->name, "backlight")) { 598 if (drm_object_property_set_value(&connector->base, 599 property, 600 value)) 601 goto set_prop_error; 602 else 603 gma_backlight_set(encoder->dev, value); 604 } else if (!strcmp(property->name, "DPMS")) { 605 const struct drm_encoder_helper_funcs *hfuncs 606 = encoder->helper_private; 607 hfuncs->dpms(encoder, value); 608 } 609 610 set_prop_done: 611 return 0; 612 set_prop_error: 613 return -1; 614 } 615 616 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { 617 .dpms = psb_intel_lvds_encoder_dpms, 618 .mode_fixup = psb_intel_lvds_mode_fixup, 619 .prepare = psb_intel_lvds_prepare, 620 .mode_set = psb_intel_lvds_mode_set, 621 .commit = psb_intel_lvds_commit, 622 }; 623 624 const struct drm_connector_helper_funcs 625 psb_intel_lvds_connector_helper_funcs = { 626 .get_modes = psb_intel_lvds_get_modes, 627 .mode_valid = psb_intel_lvds_mode_valid, 628 .best_encoder = gma_best_encoder, 629 }; 630 631 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { 632 .dpms = drm_helper_connector_dpms, 633 .fill_modes = drm_helper_probe_single_connector_modes, 634 .set_property = psb_intel_lvds_set_property, 635 .destroy = psb_intel_lvds_destroy, 636 }; 637 638 639 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder) 640 { 641 drm_encoder_cleanup(encoder); 642 } 643 644 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = { 645 .destroy = psb_intel_lvds_enc_destroy, 646 }; 647 648 649 650 /** 651 * psb_intel_lvds_init - setup LVDS connectors on this device 652 * @dev: drm device 653 * 654 * Create the connector, register the LVDS DDC bus, and try to figure out what 655 * modes we can display on the LVDS panel (if present). 656 */ 657 void psb_intel_lvds_init(struct drm_device *dev, 658 struct psb_intel_mode_device *mode_dev) 659 { 660 struct gma_encoder *gma_encoder; 661 struct gma_connector *gma_connector; 662 struct psb_intel_lvds_priv *lvds_priv; 663 struct drm_connector *connector; 664 struct drm_encoder *encoder; 665 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 666 struct drm_crtc *crtc; 667 struct drm_psb_private *dev_priv = dev->dev_private; 668 u32 lvds; 669 int pipe; 670 671 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 672 if (!gma_encoder) { 673 dev_err(dev->dev, "gma_encoder allocation error\n"); 674 return; 675 } 676 677 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 678 if (!gma_connector) { 679 dev_err(dev->dev, "gma_connector allocation error\n"); 680 goto failed_encoder; 681 } 682 683 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); 684 if (!lvds_priv) { 685 dev_err(dev->dev, "LVDS private allocation error\n"); 686 goto failed_connector; 687 } 688 689 gma_encoder->dev_priv = lvds_priv; 690 691 connector = &gma_connector->base; 692 gma_connector->save = psb_intel_lvds_save; 693 gma_connector->restore = psb_intel_lvds_restore; 694 695 encoder = &gma_encoder->base; 696 drm_connector_init(dev, connector, 697 &psb_intel_lvds_connector_funcs, 698 DRM_MODE_CONNECTOR_LVDS); 699 700 drm_encoder_init(dev, encoder, 701 &psb_intel_lvds_enc_funcs, 702 DRM_MODE_ENCODER_LVDS, NULL); 703 704 gma_connector_attach_encoder(gma_connector, gma_encoder); 705 gma_encoder->type = INTEL_OUTPUT_LVDS; 706 707 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); 708 drm_connector_helper_add(connector, 709 &psb_intel_lvds_connector_helper_funcs); 710 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 711 connector->interlace_allowed = false; 712 connector->doublescan_allowed = false; 713 714 /*Attach connector properties*/ 715 drm_object_attach_property(&connector->base, 716 dev->mode_config.scaling_mode_property, 717 DRM_MODE_SCALE_FULLSCREEN); 718 drm_object_attach_property(&connector->base, 719 dev_priv->backlight_property, 720 BRIGHTNESS_MAX_LEVEL); 721 722 /* 723 * Set up I2C bus 724 * FIXME: distroy i2c_bus when exit 725 */ 726 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B"); 727 if (!lvds_priv->i2c_bus) { 728 dev_printk(KERN_ERR, 729 &dev->pdev->dev, "I2C bus registration failed.\n"); 730 goto failed_blc_i2c; 731 } 732 lvds_priv->i2c_bus->slave_addr = 0x2C; 733 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; 734 735 /* 736 * LVDS discovery: 737 * 1) check for EDID on DDC 738 * 2) check for VBT data 739 * 3) check to see if LVDS is already on 740 * if none of the above, no panel 741 * 4) make sure lid is open 742 * if closed, act like it's not there for now 743 */ 744 745 /* Set up the DDC bus. */ 746 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); 747 if (!lvds_priv->ddc_bus) { 748 dev_printk(KERN_ERR, &dev->pdev->dev, 749 "DDC bus registration " "failed.\n"); 750 goto failed_ddc; 751 } 752 753 /* 754 * Attempt to get the fixed panel mode from DDC. Assume that the 755 * preferred mode is the right one. 756 */ 757 mutex_lock(&dev->mode_config.mutex); 758 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter); 759 list_for_each_entry(scan, &connector->probed_modes, head) { 760 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 761 mode_dev->panel_fixed_mode = 762 drm_mode_duplicate(dev, scan); 763 goto out; /* FIXME: check for quirks */ 764 } 765 } 766 767 /* Failed to get EDID, what about VBT? do we need this? */ 768 if (mode_dev->vbt_mode) 769 mode_dev->panel_fixed_mode = 770 drm_mode_duplicate(dev, mode_dev->vbt_mode); 771 772 if (!mode_dev->panel_fixed_mode) 773 if (dev_priv->lfp_lvds_vbt_mode) 774 mode_dev->panel_fixed_mode = 775 drm_mode_duplicate(dev, 776 dev_priv->lfp_lvds_vbt_mode); 777 778 /* 779 * If we didn't get EDID, try checking if the panel is already turned 780 * on. If so, assume that whatever is currently programmed is the 781 * correct mode. 782 */ 783 lvds = REG_READ(LVDS); 784 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 785 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 786 787 if (crtc && (lvds & LVDS_PORT_EN)) { 788 mode_dev->panel_fixed_mode = 789 psb_intel_crtc_mode_get(dev, crtc); 790 if (mode_dev->panel_fixed_mode) { 791 mode_dev->panel_fixed_mode->type |= 792 DRM_MODE_TYPE_PREFERRED; 793 goto out; /* FIXME: check for quirks */ 794 } 795 } 796 797 /* If we still don't have a mode after all that, give up. */ 798 if (!mode_dev->panel_fixed_mode) { 799 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); 800 goto failed_find; 801 } 802 803 /* 804 * Blacklist machines with BIOSes that list an LVDS panel without 805 * actually having one. 806 */ 807 out: 808 mutex_unlock(&dev->mode_config.mutex); 809 drm_connector_register(connector); 810 return; 811 812 failed_find: 813 mutex_unlock(&dev->mode_config.mutex); 814 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 815 failed_ddc: 816 psb_intel_i2c_destroy(lvds_priv->i2c_bus); 817 failed_blc_i2c: 818 drm_encoder_cleanup(encoder); 819 drm_connector_cleanup(connector); 820 failed_connector: 821 kfree(gma_connector); 822 failed_encoder: 823 kfree(gma_encoder); 824 } 825 826