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 gma_i2c_chan *i2c_bus; 53 }; 54 55 56 /* 57 * Returns the maximum level of the backlight duty cycle field. 58 */ 59 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev) 60 { 61 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 62 u32 ret; 63 64 if (gma_power_begin(dev, false)) { 65 ret = REG_READ(BLC_PWM_CTL); 66 gma_power_end(dev); 67 } else /* Powered off, use the saved value */ 68 ret = dev_priv->regs.saveBLC_PWM_CTL; 69 70 /* Top 15bits hold the frequency mask */ 71 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >> 72 BACKLIGHT_MODULATION_FREQ_SHIFT; 73 74 ret *= 2; /* Return a 16bit range as needed for setting */ 75 if (ret == 0) 76 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n", 77 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL); 78 return ret; 79 } 80 81 /* 82 * Set LVDS backlight level by I2C command 83 * 84 * FIXME: at some point we need to both track this for PM and also 85 * disable runtime pm on MRST if the brightness is nil (ie blanked) 86 */ 87 static int psb_lvds_i2c_set_brightness(struct drm_device *dev, 88 unsigned int level) 89 { 90 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 91 92 struct gma_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 93 u8 out_buf[2]; 94 unsigned int blc_i2c_brightness; 95 96 struct i2c_msg msgs[] = { 97 { 98 .addr = lvds_i2c_bus->slave_addr, 99 .flags = 0, 100 .len = 2, 101 .buf = out_buf, 102 } 103 }; 104 105 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 106 BRIGHTNESS_MASK / 107 BRIGHTNESS_MAX_LEVEL); 108 109 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 110 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 111 112 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 113 out_buf[1] = (u8)blc_i2c_brightness; 114 115 if (i2c_transfer(&lvds_i2c_bus->base, msgs, 1) == 1) { 116 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n", 117 dev_priv->lvds_bl->brightnesscmd, 118 blc_i2c_brightness); 119 return 0; 120 } 121 122 dev_err(dev->dev, "I2C transfer error\n"); 123 return -1; 124 } 125 126 127 static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level) 128 { 129 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 130 131 u32 max_pwm_blc; 132 u32 blc_pwm_duty_cycle; 133 134 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev); 135 136 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 137 BUG_ON(max_pwm_blc == 0); 138 139 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 140 141 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 142 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 143 144 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 145 REG_WRITE(BLC_PWM_CTL, 146 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 147 (blc_pwm_duty_cycle)); 148 149 dev_info(dev->dev, "Backlight lvds set brightness %08x\n", 150 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 151 (blc_pwm_duty_cycle)); 152 153 return 0; 154 } 155 156 /* 157 * Set LVDS backlight level either by I2C or PWM 158 */ 159 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level) 160 { 161 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 162 163 dev_dbg(dev->dev, "backlight level is %d\n", level); 164 165 if (!dev_priv->lvds_bl) { 166 dev_err(dev->dev, "NO LVDS backlight info\n"); 167 return; 168 } 169 170 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 171 psb_lvds_i2c_set_brightness(dev, level); 172 else 173 psb_lvds_pwm_set_brightness(dev, level); 174 } 175 176 /* 177 * Sets the backlight level. 178 * 179 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight(). 180 */ 181 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level) 182 { 183 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 184 u32 blc_pwm_ctl; 185 186 if (gma_power_begin(dev, false)) { 187 blc_pwm_ctl = REG_READ(BLC_PWM_CTL); 188 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; 189 REG_WRITE(BLC_PWM_CTL, 190 (blc_pwm_ctl | 191 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 192 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 193 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 194 gma_power_end(dev); 195 } else { 196 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 197 ~BACKLIGHT_DUTY_CYCLE_MASK; 198 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 199 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 200 } 201 } 202 203 /* 204 * Sets the power state for the panel. 205 */ 206 static void psb_intel_lvds_set_power(struct drm_device *dev, bool on) 207 { 208 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 209 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 210 u32 pp_status; 211 212 if (!gma_power_begin(dev, true)) { 213 dev_err(dev->dev, "set power, chip off!\n"); 214 return; 215 } 216 217 if (on) { 218 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 219 POWER_TARGET_ON); 220 do { 221 pp_status = REG_READ(PP_STATUS); 222 } while ((pp_status & PP_ON) == 0); 223 224 psb_intel_lvds_set_backlight(dev, 225 mode_dev->backlight_duty_cycle); 226 } else { 227 psb_intel_lvds_set_backlight(dev, 0); 228 229 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 230 ~POWER_TARGET_ON); 231 do { 232 pp_status = REG_READ(PP_STATUS); 233 } while (pp_status & PP_ON); 234 } 235 236 gma_power_end(dev); 237 } 238 239 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 240 { 241 struct drm_device *dev = encoder->dev; 242 243 if (mode == DRM_MODE_DPMS_ON) 244 psb_intel_lvds_set_power(dev, true); 245 else 246 psb_intel_lvds_set_power(dev, false); 247 248 /* XXX: We never power down the LVDS pairs. */ 249 } 250 251 static void psb_intel_lvds_save(struct drm_connector *connector) 252 { 253 struct drm_device *dev = connector->dev; 254 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 255 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 256 struct psb_intel_lvds_priv *lvds_priv = 257 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 258 259 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON); 260 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF); 261 lvds_priv->saveLVDS = REG_READ(LVDS); 262 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL); 263 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE); 264 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/ 265 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 266 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL); 267 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS); 268 269 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/ 270 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL & 271 BACKLIGHT_DUTY_CYCLE_MASK); 272 273 /* 274 * If the light is off at server startup, 275 * just make it full brightness 276 */ 277 if (dev_priv->backlight_duty_cycle == 0) 278 dev_priv->backlight_duty_cycle = 279 psb_intel_lvds_get_max_backlight(dev); 280 281 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 282 lvds_priv->savePP_ON, 283 lvds_priv->savePP_OFF, 284 lvds_priv->saveLVDS, 285 lvds_priv->savePP_CONTROL, 286 lvds_priv->savePP_CYCLE, 287 lvds_priv->saveBLC_PWM_CTL); 288 } 289 290 static void psb_intel_lvds_restore(struct drm_connector *connector) 291 { 292 struct drm_device *dev = connector->dev; 293 u32 pp_status; 294 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 295 struct psb_intel_lvds_priv *lvds_priv = 296 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 297 298 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 299 lvds_priv->savePP_ON, 300 lvds_priv->savePP_OFF, 301 lvds_priv->saveLVDS, 302 lvds_priv->savePP_CONTROL, 303 lvds_priv->savePP_CYCLE, 304 lvds_priv->saveBLC_PWM_CTL); 305 306 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL); 307 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL); 308 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS); 309 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON); 310 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF); 311 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/ 312 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE); 313 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL); 314 REG_WRITE(LVDS, lvds_priv->saveLVDS); 315 316 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) { 317 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 318 POWER_TARGET_ON); 319 do { 320 pp_status = REG_READ(PP_STATUS); 321 } while ((pp_status & PP_ON) == 0); 322 } else { 323 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 324 ~POWER_TARGET_ON); 325 do { 326 pp_status = REG_READ(PP_STATUS); 327 } while (pp_status & PP_ON); 328 } 329 } 330 331 enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector, 332 struct drm_display_mode *mode) 333 { 334 struct drm_psb_private *dev_priv = to_drm_psb_private(connector->dev); 335 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 336 struct drm_display_mode *fixed_mode = 337 dev_priv->mode_dev.panel_fixed_mode; 338 339 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 340 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2; 341 342 /* just in case */ 343 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 344 return MODE_NO_DBLESCAN; 345 346 /* just in case */ 347 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 348 return MODE_NO_INTERLACE; 349 350 if (fixed_mode) { 351 if (mode->hdisplay > fixed_mode->hdisplay) 352 return MODE_PANEL; 353 if (mode->vdisplay > fixed_mode->vdisplay) 354 return MODE_PANEL; 355 } 356 return MODE_OK; 357 } 358 359 bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder, 360 const struct drm_display_mode *mode, 361 struct drm_display_mode *adjusted_mode) 362 { 363 struct drm_device *dev = encoder->dev; 364 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 365 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 366 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 367 struct drm_encoder *tmp_encoder; 368 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 369 struct gma_encoder *gma_encoder = to_gma_encoder(encoder); 370 371 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 372 panel_fixed_mode = mode_dev->panel_fixed_mode2; 373 374 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */ 375 if (!IS_MRST(dev) && gma_crtc->pipe == 0) { 376 pr_err("Can't support LVDS on pipe A\n"); 377 return false; 378 } 379 if (IS_MRST(dev) && gma_crtc->pipe != 0) { 380 pr_err("Must use PIPE A\n"); 381 return false; 382 } 383 /* Should never happen!! */ 384 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 385 head) { 386 if (tmp_encoder != encoder 387 && tmp_encoder->crtc == encoder->crtc) { 388 pr_err("Can't enable LVDS and another encoder on the same pipe\n"); 389 return false; 390 } 391 } 392 393 /* 394 * If we have timings from the BIOS for the panel, put them in 395 * to the adjusted mode. The CRTC will be set up for this mode, 396 * with the panel scaling set up to source from the H/VDisplay 397 * of the original mode. 398 */ 399 if (panel_fixed_mode != NULL) { 400 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 401 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 402 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 403 adjusted_mode->htotal = panel_fixed_mode->htotal; 404 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 405 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 406 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 407 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 408 adjusted_mode->clock = panel_fixed_mode->clock; 409 drm_mode_set_crtcinfo(adjusted_mode, 410 CRTC_INTERLACE_HALVE_V); 411 } 412 413 /* 414 * XXX: It would be nice to support lower refresh rates on the 415 * panels to reduce power consumption, and perhaps match the 416 * user's requested refresh rate. 417 */ 418 419 return true; 420 } 421 422 static void psb_intel_lvds_prepare(struct drm_encoder *encoder) 423 { 424 struct drm_device *dev = encoder->dev; 425 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 426 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 427 428 if (!gma_power_begin(dev, true)) 429 return; 430 431 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 432 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 433 BACKLIGHT_DUTY_CYCLE_MASK); 434 435 psb_intel_lvds_set_power(dev, false); 436 437 gma_power_end(dev); 438 } 439 440 static void psb_intel_lvds_commit(struct drm_encoder *encoder) 441 { 442 struct drm_device *dev = encoder->dev; 443 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 444 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 445 446 if (mode_dev->backlight_duty_cycle == 0) 447 mode_dev->backlight_duty_cycle = 448 psb_intel_lvds_get_max_backlight(dev); 449 450 psb_intel_lvds_set_power(dev, true); 451 } 452 453 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder, 454 struct drm_display_mode *mode, 455 struct drm_display_mode *adjusted_mode) 456 { 457 struct drm_device *dev = encoder->dev; 458 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 459 u32 pfit_control; 460 461 /* 462 * The LVDS pin pair will already have been turned on in the 463 * psb_intel_crtc_mode_set since it has a large impact on the DPLL 464 * settings. 465 */ 466 467 /* 468 * Enable automatic panel scaling so that non-native modes fill the 469 * screen. Should be enabled before the pipe is enabled, according to 470 * register description and PRM. 471 */ 472 if (mode->hdisplay != adjusted_mode->hdisplay || 473 mode->vdisplay != adjusted_mode->vdisplay) 474 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 475 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 476 HORIZ_INTERP_BILINEAR); 477 else 478 pfit_control = 0; 479 480 if (dev_priv->lvds_dither) 481 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 482 483 REG_WRITE(PFIT_CONTROL, pfit_control); 484 } 485 486 /* 487 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 488 */ 489 static int psb_intel_lvds_get_modes(struct drm_connector *connector) 490 { 491 struct drm_device *dev = connector->dev; 492 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 493 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 494 int ret = 0; 495 496 if (!IS_MRST(dev)) 497 ret = psb_intel_ddc_get_modes(connector, connector->ddc); 498 499 if (ret) 500 return ret; 501 502 if (mode_dev->panel_fixed_mode != NULL) { 503 struct drm_display_mode *mode = 504 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 505 drm_mode_probed_add(connector, mode); 506 return 1; 507 } 508 509 return 0; 510 } 511 512 void psb_intel_lvds_destroy(struct drm_connector *connector) 513 { 514 struct gma_connector *gma_connector = to_gma_connector(connector); 515 struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc); 516 517 gma_i2c_destroy(ddc_bus); 518 drm_connector_cleanup(connector); 519 kfree(gma_connector); 520 } 521 522 int psb_intel_lvds_set_property(struct drm_connector *connector, 523 struct drm_property *property, 524 uint64_t value) 525 { 526 struct drm_encoder *encoder = connector->encoder; 527 528 if (!encoder) 529 return -1; 530 531 if (!strcmp(property->name, "scaling mode")) { 532 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 533 uint64_t curval; 534 535 if (!crtc) 536 goto set_prop_error; 537 538 switch (value) { 539 case DRM_MODE_SCALE_FULLSCREEN: 540 break; 541 case DRM_MODE_SCALE_NO_SCALE: 542 break; 543 case DRM_MODE_SCALE_ASPECT: 544 break; 545 default: 546 goto set_prop_error; 547 } 548 549 if (drm_object_property_get_value(&connector->base, 550 property, 551 &curval)) 552 goto set_prop_error; 553 554 if (curval == value) 555 goto set_prop_done; 556 557 if (drm_object_property_set_value(&connector->base, 558 property, 559 value)) 560 goto set_prop_error; 561 562 if (crtc->saved_mode.hdisplay != 0 && 563 crtc->saved_mode.vdisplay != 0) { 564 if (!drm_crtc_helper_set_mode(encoder->crtc, 565 &crtc->saved_mode, 566 encoder->crtc->x, 567 encoder->crtc->y, 568 encoder->crtc->primary->fb)) 569 goto set_prop_error; 570 } 571 } else if (!strcmp(property->name, "backlight")) { 572 if (drm_object_property_set_value(&connector->base, 573 property, 574 value)) 575 goto set_prop_error; 576 else 577 gma_backlight_set(encoder->dev, value); 578 } else if (!strcmp(property->name, "DPMS")) { 579 const struct drm_encoder_helper_funcs *hfuncs 580 = encoder->helper_private; 581 hfuncs->dpms(encoder, value); 582 } 583 584 set_prop_done: 585 return 0; 586 set_prop_error: 587 return -1; 588 } 589 590 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { 591 .dpms = psb_intel_lvds_encoder_dpms, 592 .mode_fixup = psb_intel_lvds_mode_fixup, 593 .prepare = psb_intel_lvds_prepare, 594 .mode_set = psb_intel_lvds_mode_set, 595 .commit = psb_intel_lvds_commit, 596 }; 597 598 const struct drm_connector_helper_funcs 599 psb_intel_lvds_connector_helper_funcs = { 600 .get_modes = psb_intel_lvds_get_modes, 601 .mode_valid = psb_intel_lvds_mode_valid, 602 .best_encoder = gma_best_encoder, 603 }; 604 605 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { 606 .dpms = drm_helper_connector_dpms, 607 .fill_modes = drm_helper_probe_single_connector_modes, 608 .set_property = psb_intel_lvds_set_property, 609 .destroy = psb_intel_lvds_destroy, 610 }; 611 612 /** 613 * psb_intel_lvds_init - setup LVDS connectors on this device 614 * @dev: drm device 615 * @mode_dev: mode device 616 * 617 * Create the connector, register the LVDS DDC bus, and try to figure out what 618 * modes we can display on the LVDS panel (if present). 619 */ 620 void psb_intel_lvds_init(struct drm_device *dev, 621 struct psb_intel_mode_device *mode_dev) 622 { 623 struct gma_encoder *gma_encoder; 624 struct gma_connector *gma_connector; 625 struct psb_intel_lvds_priv *lvds_priv; 626 struct drm_connector *connector; 627 struct drm_encoder *encoder; 628 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 629 struct drm_crtc *crtc; 630 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 631 struct gma_i2c_chan *ddc_bus; 632 u32 lvds; 633 int pipe; 634 int ret; 635 636 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 637 if (!gma_encoder) { 638 dev_err(dev->dev, "gma_encoder allocation error\n"); 639 return; 640 } 641 encoder = &gma_encoder->base; 642 643 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 644 if (!gma_connector) { 645 dev_err(dev->dev, "gma_connector allocation error\n"); 646 goto err_free_encoder; 647 } 648 649 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); 650 if (!lvds_priv) { 651 dev_err(dev->dev, "LVDS private allocation error\n"); 652 goto err_free_connector; 653 } 654 655 gma_encoder->dev_priv = lvds_priv; 656 657 connector = &gma_connector->base; 658 gma_connector->save = psb_intel_lvds_save; 659 gma_connector->restore = psb_intel_lvds_restore; 660 661 /* Set up the DDC bus. */ 662 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C"); 663 if (!ddc_bus) { 664 dev_printk(KERN_ERR, dev->dev, 665 "DDC bus registration " "failed.\n"); 666 goto err_free_lvds_priv; 667 } 668 669 ret = drm_connector_init_with_ddc(dev, connector, 670 &psb_intel_lvds_connector_funcs, 671 DRM_MODE_CONNECTOR_LVDS, 672 &ddc_bus->base); 673 if (ret) 674 goto err_ddc_destroy; 675 676 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS); 677 if (ret) 678 goto err_connector_cleanup; 679 680 gma_connector_attach_encoder(gma_connector, gma_encoder); 681 gma_encoder->type = INTEL_OUTPUT_LVDS; 682 683 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); 684 drm_connector_helper_add(connector, 685 &psb_intel_lvds_connector_helper_funcs); 686 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 687 connector->interlace_allowed = false; 688 connector->doublescan_allowed = false; 689 690 /*Attach connector properties*/ 691 drm_object_attach_property(&connector->base, 692 dev->mode_config.scaling_mode_property, 693 DRM_MODE_SCALE_FULLSCREEN); 694 drm_object_attach_property(&connector->base, 695 dev_priv->backlight_property, 696 BRIGHTNESS_MAX_LEVEL); 697 698 /* 699 * Set up I2C bus 700 * FIXME: distroy i2c_bus when exit 701 */ 702 lvds_priv->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B"); 703 if (!lvds_priv->i2c_bus) { 704 dev_printk(KERN_ERR, 705 dev->dev, "I2C bus registration failed.\n"); 706 goto err_encoder_cleanup; 707 } 708 lvds_priv->i2c_bus->slave_addr = 0x2C; 709 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; 710 711 /* 712 * LVDS discovery: 713 * 1) check for EDID on DDC 714 * 2) check for VBT data 715 * 3) check to see if LVDS is already on 716 * if none of the above, no panel 717 * 4) make sure lid is open 718 * if closed, act like it's not there for now 719 */ 720 721 /* 722 * Attempt to get the fixed panel mode from DDC. Assume that the 723 * preferred mode is the right one. 724 */ 725 mutex_lock(&dev->mode_config.mutex); 726 psb_intel_ddc_get_modes(connector, &ddc_bus->base); 727 728 list_for_each_entry(scan, &connector->probed_modes, head) { 729 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 730 mode_dev->panel_fixed_mode = 731 drm_mode_duplicate(dev, scan); 732 DRM_DEBUG_KMS("Using mode from DDC\n"); 733 goto out; /* FIXME: check for quirks */ 734 } 735 } 736 737 /* Failed to get EDID, what about VBT? do we need this? */ 738 if (dev_priv->lfp_lvds_vbt_mode) { 739 mode_dev->panel_fixed_mode = 740 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 741 742 if (mode_dev->panel_fixed_mode) { 743 mode_dev->panel_fixed_mode->type |= 744 DRM_MODE_TYPE_PREFERRED; 745 DRM_DEBUG_KMS("Using mode from VBT\n"); 746 goto out; 747 } 748 } 749 750 /* 751 * If we didn't get EDID, try checking if the panel is already turned 752 * on. If so, assume that whatever is currently programmed is the 753 * correct mode. 754 */ 755 lvds = REG_READ(LVDS); 756 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 757 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 758 759 if (crtc && (lvds & LVDS_PORT_EN)) { 760 mode_dev->panel_fixed_mode = 761 psb_intel_crtc_mode_get(dev, crtc); 762 if (mode_dev->panel_fixed_mode) { 763 mode_dev->panel_fixed_mode->type |= 764 DRM_MODE_TYPE_PREFERRED; 765 DRM_DEBUG_KMS("Using pre-programmed mode\n"); 766 goto out; /* FIXME: check for quirks */ 767 } 768 } 769 770 /* If we still don't have a mode after all that, give up. */ 771 if (!mode_dev->panel_fixed_mode) { 772 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); 773 goto err_unlock; 774 } 775 776 /* 777 * Blacklist machines with BIOSes that list an LVDS panel without 778 * actually having one. 779 */ 780 out: 781 mutex_unlock(&dev->mode_config.mutex); 782 return; 783 784 err_unlock: 785 mutex_unlock(&dev->mode_config.mutex); 786 gma_i2c_destroy(lvds_priv->i2c_bus); 787 err_encoder_cleanup: 788 drm_encoder_cleanup(encoder); 789 err_connector_cleanup: 790 drm_connector_cleanup(connector); 791 err_ddc_destroy: 792 gma_i2c_destroy(ddc_bus); 793 err_free_lvds_priv: 794 kfree(lvds_priv); 795 err_free_connector: 796 kfree(gma_connector); 797 err_free_encoder: 798 kfree(gma_encoder); 799 } 800 801