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