1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright © 2006-2007 Intel Corporation 4 * 5 * Authors: 6 * Eric Anholt <eric@anholt.net> 7 * Dave Airlie <airlied@linux.ie> 8 * Jesse Barnes <jesse.barnes@intel.com> 9 */ 10 11 #include <linux/i2c.h> 12 #include <linux/pm_runtime.h> 13 14 #include <drm/drm_simple_kms_helper.h> 15 16 #include "intel_bios.h" 17 #include "power.h" 18 #include "psb_drv.h" 19 #include "psb_intel_drv.h" 20 #include "psb_intel_reg.h" 21 22 /* 23 * LVDS I2C backlight control macros 24 */ 25 #define BRIGHTNESS_MAX_LEVEL 100 26 #define BRIGHTNESS_MASK 0xFF 27 #define BLC_I2C_TYPE 0x01 28 #define BLC_PWM_TYPT 0x02 29 30 #define BLC_POLARITY_NORMAL 0 31 #define BLC_POLARITY_INVERSE 1 32 33 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 34 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 35 #define PSB_BLC_PWM_PRECISION_FACTOR (10) 36 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 37 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 38 39 struct psb_intel_lvds_priv { 40 /* 41 * Saved LVDO output states 42 */ 43 uint32_t savePP_ON; 44 uint32_t savePP_OFF; 45 uint32_t saveLVDS; 46 uint32_t savePP_CONTROL; 47 uint32_t savePP_CYCLE; 48 uint32_t savePFIT_CONTROL; 49 uint32_t savePFIT_PGM_RATIOS; 50 uint32_t saveBLC_PWM_CTL; 51 52 struct psb_intel_i2c_chan *i2c_bus; 53 struct psb_intel_i2c_chan *ddc_bus; 54 }; 55 56 57 /* 58 * Returns the maximum level of the backlight duty cycle field. 59 */ 60 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev) 61 { 62 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 63 u32 ret; 64 65 if (gma_power_begin(dev, false)) { 66 ret = REG_READ(BLC_PWM_CTL); 67 gma_power_end(dev); 68 } else /* Powered off, use the saved value */ 69 ret = dev_priv->regs.saveBLC_PWM_CTL; 70 71 /* Top 15bits hold the frequency mask */ 72 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >> 73 BACKLIGHT_MODULATION_FREQ_SHIFT; 74 75 ret *= 2; /* Return a 16bit range as needed for setting */ 76 if (ret == 0) 77 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n", 78 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL); 79 return ret; 80 } 81 82 /* 83 * Set LVDS backlight level by I2C command 84 * 85 * FIXME: at some point we need to both track this for PM and also 86 * disable runtime pm on MRST if the brightness is nil (ie blanked) 87 */ 88 static int psb_lvds_i2c_set_brightness(struct drm_device *dev, 89 unsigned int level) 90 { 91 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 92 93 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 94 u8 out_buf[2]; 95 unsigned int blc_i2c_brightness; 96 97 struct i2c_msg msgs[] = { 98 { 99 .addr = lvds_i2c_bus->slave_addr, 100 .flags = 0, 101 .len = 2, 102 .buf = out_buf, 103 } 104 }; 105 106 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 107 BRIGHTNESS_MASK / 108 BRIGHTNESS_MAX_LEVEL); 109 110 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 111 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 112 113 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 114 out_buf[1] = (u8)blc_i2c_brightness; 115 116 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) { 117 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n", 118 dev_priv->lvds_bl->brightnesscmd, 119 blc_i2c_brightness); 120 return 0; 121 } 122 123 dev_err(dev->dev, "I2C transfer error\n"); 124 return -1; 125 } 126 127 128 static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level) 129 { 130 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 131 132 u32 max_pwm_blc; 133 u32 blc_pwm_duty_cycle; 134 135 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev); 136 137 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 138 BUG_ON(max_pwm_blc == 0); 139 140 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 141 142 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 143 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 144 145 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 146 REG_WRITE(BLC_PWM_CTL, 147 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 148 (blc_pwm_duty_cycle)); 149 150 dev_info(dev->dev, "Backlight lvds set brightness %08x\n", 151 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 152 (blc_pwm_duty_cycle)); 153 154 return 0; 155 } 156 157 /* 158 * Set LVDS backlight level either by I2C or PWM 159 */ 160 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level) 161 { 162 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 163 164 dev_dbg(dev->dev, "backlight level is %d\n", level); 165 166 if (!dev_priv->lvds_bl) { 167 dev_err(dev->dev, "NO LVDS backlight info\n"); 168 return; 169 } 170 171 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 172 psb_lvds_i2c_set_brightness(dev, level); 173 else 174 psb_lvds_pwm_set_brightness(dev, level); 175 } 176 177 /* 178 * Sets the backlight level. 179 * 180 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight(). 181 */ 182 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level) 183 { 184 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 185 u32 blc_pwm_ctl; 186 187 if (gma_power_begin(dev, false)) { 188 blc_pwm_ctl = REG_READ(BLC_PWM_CTL); 189 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; 190 REG_WRITE(BLC_PWM_CTL, 191 (blc_pwm_ctl | 192 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 193 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 194 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 195 gma_power_end(dev); 196 } else { 197 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 198 ~BACKLIGHT_DUTY_CYCLE_MASK; 199 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 200 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 201 } 202 } 203 204 /* 205 * Sets the power state for the panel. 206 */ 207 static void psb_intel_lvds_set_power(struct drm_device *dev, bool on) 208 { 209 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 210 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 211 u32 pp_status; 212 213 if (!gma_power_begin(dev, true)) { 214 dev_err(dev->dev, "set power, chip off!\n"); 215 return; 216 } 217 218 if (on) { 219 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 220 POWER_TARGET_ON); 221 do { 222 pp_status = REG_READ(PP_STATUS); 223 } while ((pp_status & PP_ON) == 0); 224 225 psb_intel_lvds_set_backlight(dev, 226 mode_dev->backlight_duty_cycle); 227 } else { 228 psb_intel_lvds_set_backlight(dev, 0); 229 230 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 231 ~POWER_TARGET_ON); 232 do { 233 pp_status = REG_READ(PP_STATUS); 234 } while (pp_status & PP_ON); 235 } 236 237 gma_power_end(dev); 238 } 239 240 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 241 { 242 struct drm_device *dev = encoder->dev; 243 244 if (mode == DRM_MODE_DPMS_ON) 245 psb_intel_lvds_set_power(dev, true); 246 else 247 psb_intel_lvds_set_power(dev, false); 248 249 /* XXX: We never power down the LVDS pairs. */ 250 } 251 252 static void psb_intel_lvds_save(struct drm_connector *connector) 253 { 254 struct drm_device *dev = connector->dev; 255 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 256 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 257 struct psb_intel_lvds_priv *lvds_priv = 258 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 259 260 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON); 261 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF); 262 lvds_priv->saveLVDS = REG_READ(LVDS); 263 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL); 264 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE); 265 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/ 266 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 267 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL); 268 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS); 269 270 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/ 271 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL & 272 BACKLIGHT_DUTY_CYCLE_MASK); 273 274 /* 275 * If the light is off at server startup, 276 * just make it full brightness 277 */ 278 if (dev_priv->backlight_duty_cycle == 0) 279 dev_priv->backlight_duty_cycle = 280 psb_intel_lvds_get_max_backlight(dev); 281 282 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 283 lvds_priv->savePP_ON, 284 lvds_priv->savePP_OFF, 285 lvds_priv->saveLVDS, 286 lvds_priv->savePP_CONTROL, 287 lvds_priv->savePP_CYCLE, 288 lvds_priv->saveBLC_PWM_CTL); 289 } 290 291 static void psb_intel_lvds_restore(struct drm_connector *connector) 292 { 293 struct drm_device *dev = connector->dev; 294 u32 pp_status; 295 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 296 struct psb_intel_lvds_priv *lvds_priv = 297 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 298 299 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 300 lvds_priv->savePP_ON, 301 lvds_priv->savePP_OFF, 302 lvds_priv->saveLVDS, 303 lvds_priv->savePP_CONTROL, 304 lvds_priv->savePP_CYCLE, 305 lvds_priv->saveBLC_PWM_CTL); 306 307 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL); 308 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL); 309 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS); 310 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON); 311 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF); 312 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/ 313 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE); 314 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL); 315 REG_WRITE(LVDS, lvds_priv->saveLVDS); 316 317 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) { 318 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 319 POWER_TARGET_ON); 320 do { 321 pp_status = REG_READ(PP_STATUS); 322 } while ((pp_status & PP_ON) == 0); 323 } else { 324 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 325 ~POWER_TARGET_ON); 326 do { 327 pp_status = REG_READ(PP_STATUS); 328 } while (pp_status & PP_ON); 329 } 330 } 331 332 enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector, 333 struct drm_display_mode *mode) 334 { 335 struct drm_psb_private *dev_priv = to_drm_psb_private(connector->dev); 336 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 337 struct drm_display_mode *fixed_mode = 338 dev_priv->mode_dev.panel_fixed_mode; 339 340 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 341 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2; 342 343 /* just in case */ 344 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 345 return MODE_NO_DBLESCAN; 346 347 /* just in case */ 348 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 349 return MODE_NO_INTERLACE; 350 351 if (fixed_mode) { 352 if (mode->hdisplay > fixed_mode->hdisplay) 353 return MODE_PANEL; 354 if (mode->vdisplay > fixed_mode->vdisplay) 355 return MODE_PANEL; 356 } 357 return MODE_OK; 358 } 359 360 bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder, 361 const struct drm_display_mode *mode, 362 struct drm_display_mode *adjusted_mode) 363 { 364 struct drm_device *dev = encoder->dev; 365 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 366 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 367 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 368 struct drm_encoder *tmp_encoder; 369 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 370 struct gma_encoder *gma_encoder = to_gma_encoder(encoder); 371 372 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 373 panel_fixed_mode = mode_dev->panel_fixed_mode2; 374 375 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */ 376 if (!IS_MRST(dev) && gma_crtc->pipe == 0) { 377 pr_err("Can't support LVDS on pipe A\n"); 378 return false; 379 } 380 if (IS_MRST(dev) && gma_crtc->pipe != 0) { 381 pr_err("Must use PIPE A\n"); 382 return false; 383 } 384 /* Should never happen!! */ 385 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 386 head) { 387 if (tmp_encoder != encoder 388 && tmp_encoder->crtc == encoder->crtc) { 389 pr_err("Can't enable LVDS and another encoder on the same pipe\n"); 390 return false; 391 } 392 } 393 394 /* 395 * If we have timings from the BIOS for the panel, put them in 396 * to the adjusted mode. The CRTC will be set up for this mode, 397 * with the panel scaling set up to source from the H/VDisplay 398 * of the original mode. 399 */ 400 if (panel_fixed_mode != NULL) { 401 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 402 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 403 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 404 adjusted_mode->htotal = panel_fixed_mode->htotal; 405 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 406 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 407 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 408 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 409 adjusted_mode->clock = panel_fixed_mode->clock; 410 drm_mode_set_crtcinfo(adjusted_mode, 411 CRTC_INTERLACE_HALVE_V); 412 } 413 414 /* 415 * XXX: It would be nice to support lower refresh rates on the 416 * panels to reduce power consumption, and perhaps match the 417 * user's requested refresh rate. 418 */ 419 420 return true; 421 } 422 423 static void psb_intel_lvds_prepare(struct drm_encoder *encoder) 424 { 425 struct drm_device *dev = encoder->dev; 426 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 427 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 428 429 if (!gma_power_begin(dev, true)) 430 return; 431 432 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 433 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 434 BACKLIGHT_DUTY_CYCLE_MASK); 435 436 psb_intel_lvds_set_power(dev, false); 437 438 gma_power_end(dev); 439 } 440 441 static void psb_intel_lvds_commit(struct drm_encoder *encoder) 442 { 443 struct drm_device *dev = encoder->dev; 444 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 445 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 446 447 if (mode_dev->backlight_duty_cycle == 0) 448 mode_dev->backlight_duty_cycle = 449 psb_intel_lvds_get_max_backlight(dev); 450 451 psb_intel_lvds_set_power(dev, true); 452 } 453 454 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder, 455 struct drm_display_mode *mode, 456 struct drm_display_mode *adjusted_mode) 457 { 458 struct drm_device *dev = encoder->dev; 459 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 460 u32 pfit_control; 461 462 /* 463 * The LVDS pin pair will already have been turned on in the 464 * psb_intel_crtc_mode_set since it has a large impact on the DPLL 465 * settings. 466 */ 467 468 /* 469 * Enable automatic panel scaling so that non-native modes fill the 470 * screen. Should be enabled before the pipe is enabled, according to 471 * register description and PRM. 472 */ 473 if (mode->hdisplay != adjusted_mode->hdisplay || 474 mode->vdisplay != adjusted_mode->vdisplay) 475 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 476 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 477 HORIZ_INTERP_BILINEAR); 478 else 479 pfit_control = 0; 480 481 if (dev_priv->lvds_dither) 482 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 483 484 REG_WRITE(PFIT_CONTROL, pfit_control); 485 } 486 487 /* 488 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 489 */ 490 static int psb_intel_lvds_get_modes(struct drm_connector *connector) 491 { 492 struct drm_device *dev = connector->dev; 493 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 494 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 495 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 496 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv; 497 int ret = 0; 498 499 if (!IS_MRST(dev)) 500 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter); 501 502 if (ret) 503 return ret; 504 505 if (mode_dev->panel_fixed_mode != NULL) { 506 struct drm_display_mode *mode = 507 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 508 drm_mode_probed_add(connector, mode); 509 return 1; 510 } 511 512 return 0; 513 } 514 515 /** 516 * psb_intel_lvds_destroy - unregister and free LVDS structures 517 * @connector: connector to free 518 * 519 * Unregister the DDC bus for this connector then free the driver private 520 * structure. 521 */ 522 void psb_intel_lvds_destroy(struct drm_connector *connector) 523 { 524 struct gma_connector *gma_connector = to_gma_connector(connector); 525 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 526 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv; 527 528 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 529 drm_connector_cleanup(connector); 530 kfree(gma_connector); 531 } 532 533 int psb_intel_lvds_set_property(struct drm_connector *connector, 534 struct drm_property *property, 535 uint64_t value) 536 { 537 struct drm_encoder *encoder = connector->encoder; 538 539 if (!encoder) 540 return -1; 541 542 if (!strcmp(property->name, "scaling mode")) { 543 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 544 uint64_t curval; 545 546 if (!crtc) 547 goto set_prop_error; 548 549 switch (value) { 550 case DRM_MODE_SCALE_FULLSCREEN: 551 break; 552 case DRM_MODE_SCALE_NO_SCALE: 553 break; 554 case DRM_MODE_SCALE_ASPECT: 555 break; 556 default: 557 goto set_prop_error; 558 } 559 560 if (drm_object_property_get_value(&connector->base, 561 property, 562 &curval)) 563 goto set_prop_error; 564 565 if (curval == value) 566 goto set_prop_done; 567 568 if (drm_object_property_set_value(&connector->base, 569 property, 570 value)) 571 goto set_prop_error; 572 573 if (crtc->saved_mode.hdisplay != 0 && 574 crtc->saved_mode.vdisplay != 0) { 575 if (!drm_crtc_helper_set_mode(encoder->crtc, 576 &crtc->saved_mode, 577 encoder->crtc->x, 578 encoder->crtc->y, 579 encoder->crtc->primary->fb)) 580 goto set_prop_error; 581 } 582 } else if (!strcmp(property->name, "backlight")) { 583 if (drm_object_property_set_value(&connector->base, 584 property, 585 value)) 586 goto set_prop_error; 587 else 588 gma_backlight_set(encoder->dev, value); 589 } else if (!strcmp(property->name, "DPMS")) { 590 const struct drm_encoder_helper_funcs *hfuncs 591 = encoder->helper_private; 592 hfuncs->dpms(encoder, value); 593 } 594 595 set_prop_done: 596 return 0; 597 set_prop_error: 598 return -1; 599 } 600 601 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { 602 .dpms = psb_intel_lvds_encoder_dpms, 603 .mode_fixup = psb_intel_lvds_mode_fixup, 604 .prepare = psb_intel_lvds_prepare, 605 .mode_set = psb_intel_lvds_mode_set, 606 .commit = psb_intel_lvds_commit, 607 }; 608 609 const struct drm_connector_helper_funcs 610 psb_intel_lvds_connector_helper_funcs = { 611 .get_modes = psb_intel_lvds_get_modes, 612 .mode_valid = psb_intel_lvds_mode_valid, 613 .best_encoder = gma_best_encoder, 614 }; 615 616 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { 617 .dpms = drm_helper_connector_dpms, 618 .fill_modes = drm_helper_probe_single_connector_modes, 619 .set_property = psb_intel_lvds_set_property, 620 .destroy = psb_intel_lvds_destroy, 621 }; 622 623 /** 624 * psb_intel_lvds_init - setup LVDS connectors on this device 625 * @dev: drm device 626 * @mode_dev: mode device 627 * 628 * Create the connector, register the LVDS DDC bus, and try to figure out what 629 * modes we can display on the LVDS panel (if present). 630 */ 631 void psb_intel_lvds_init(struct drm_device *dev, 632 struct psb_intel_mode_device *mode_dev) 633 { 634 struct gma_encoder *gma_encoder; 635 struct gma_connector *gma_connector; 636 struct psb_intel_lvds_priv *lvds_priv; 637 struct drm_connector *connector; 638 struct drm_encoder *encoder; 639 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 640 struct drm_crtc *crtc; 641 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 642 u32 lvds; 643 int pipe; 644 645 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 646 if (!gma_encoder) { 647 dev_err(dev->dev, "gma_encoder allocation error\n"); 648 return; 649 } 650 651 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 652 if (!gma_connector) { 653 dev_err(dev->dev, "gma_connector allocation error\n"); 654 goto failed_encoder; 655 } 656 657 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); 658 if (!lvds_priv) { 659 dev_err(dev->dev, "LVDS private allocation error\n"); 660 goto failed_connector; 661 } 662 663 gma_encoder->dev_priv = lvds_priv; 664 665 connector = &gma_connector->base; 666 gma_connector->save = psb_intel_lvds_save; 667 gma_connector->restore = psb_intel_lvds_restore; 668 669 encoder = &gma_encoder->base; 670 drm_connector_init(dev, connector, 671 &psb_intel_lvds_connector_funcs, 672 DRM_MODE_CONNECTOR_LVDS); 673 674 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS); 675 676 gma_connector_attach_encoder(gma_connector, gma_encoder); 677 gma_encoder->type = INTEL_OUTPUT_LVDS; 678 679 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); 680 drm_connector_helper_add(connector, 681 &psb_intel_lvds_connector_helper_funcs); 682 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 683 connector->interlace_allowed = false; 684 connector->doublescan_allowed = false; 685 686 /*Attach connector properties*/ 687 drm_object_attach_property(&connector->base, 688 dev->mode_config.scaling_mode_property, 689 DRM_MODE_SCALE_FULLSCREEN); 690 drm_object_attach_property(&connector->base, 691 dev_priv->backlight_property, 692 BRIGHTNESS_MAX_LEVEL); 693 694 /* 695 * Set up I2C bus 696 * FIXME: distroy i2c_bus when exit 697 */ 698 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B"); 699 if (!lvds_priv->i2c_bus) { 700 dev_printk(KERN_ERR, 701 dev->dev, "I2C bus registration failed.\n"); 702 goto failed_blc_i2c; 703 } 704 lvds_priv->i2c_bus->slave_addr = 0x2C; 705 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; 706 707 /* 708 * LVDS discovery: 709 * 1) check for EDID on DDC 710 * 2) check for VBT data 711 * 3) check to see if LVDS is already on 712 * if none of the above, no panel 713 * 4) make sure lid is open 714 * if closed, act like it's not there for now 715 */ 716 717 /* Set up the DDC bus. */ 718 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); 719 if (!lvds_priv->ddc_bus) { 720 dev_printk(KERN_ERR, dev->dev, 721 "DDC bus registration " "failed.\n"); 722 goto failed_ddc; 723 } 724 725 /* 726 * Attempt to get the fixed panel mode from DDC. Assume that the 727 * preferred mode is the right one. 728 */ 729 mutex_lock(&dev->mode_config.mutex); 730 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter); 731 list_for_each_entry(scan, &connector->probed_modes, head) { 732 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 733 mode_dev->panel_fixed_mode = 734 drm_mode_duplicate(dev, scan); 735 DRM_DEBUG_KMS("Using mode from DDC\n"); 736 goto out; /* FIXME: check for quirks */ 737 } 738 } 739 740 /* Failed to get EDID, what about VBT? do we need this? */ 741 if (dev_priv->lfp_lvds_vbt_mode) { 742 mode_dev->panel_fixed_mode = 743 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 744 745 if (mode_dev->panel_fixed_mode) { 746 mode_dev->panel_fixed_mode->type |= 747 DRM_MODE_TYPE_PREFERRED; 748 DRM_DEBUG_KMS("Using mode from VBT\n"); 749 goto out; 750 } 751 } 752 753 /* 754 * If we didn't get EDID, try checking if the panel is already turned 755 * on. If so, assume that whatever is currently programmed is the 756 * correct mode. 757 */ 758 lvds = REG_READ(LVDS); 759 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 760 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 761 762 if (crtc && (lvds & LVDS_PORT_EN)) { 763 mode_dev->panel_fixed_mode = 764 psb_intel_crtc_mode_get(dev, crtc); 765 if (mode_dev->panel_fixed_mode) { 766 mode_dev->panel_fixed_mode->type |= 767 DRM_MODE_TYPE_PREFERRED; 768 DRM_DEBUG_KMS("Using pre-programmed mode\n"); 769 goto out; /* FIXME: check for quirks */ 770 } 771 } 772 773 /* If we still don't have a mode after all that, give up. */ 774 if (!mode_dev->panel_fixed_mode) { 775 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); 776 goto failed_find; 777 } 778 779 /* 780 * Blacklist machines with BIOSes that list an LVDS panel without 781 * actually having one. 782 */ 783 out: 784 mutex_unlock(&dev->mode_config.mutex); 785 return; 786 787 failed_find: 788 mutex_unlock(&dev->mode_config.mutex); 789 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 790 failed_ddc: 791 psb_intel_i2c_destroy(lvds_priv->i2c_bus); 792 failed_blc_i2c: 793 drm_encoder_cleanup(encoder); 794 drm_connector_cleanup(connector); 795 failed_connector: 796 kfree(gma_connector); 797 failed_encoder: 798 kfree(gma_encoder); 799 } 800 801