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_crtc_helper.h> 15#include <drm/drm_modeset_helper_vtables.h> 16#include <drm/drm_simple_kms_helper.h> 17 18#include "intel_bios.h" 19#include "power.h" 20#include "psb_drv.h" 21#include "psb_intel_drv.h" 22#include "psb_intel_reg.h" 23 24/* 25 * LVDS I2C backlight control macros 26 */ 27#define BRIGHTNESS_MAX_LEVEL 100 28#define BRIGHTNESS_MASK 0xFF 29#define BLC_I2C_TYPE 0x01 30#define BLC_PWM_TYPT 0x02 31 32#define BLC_POLARITY_NORMAL 0 33#define BLC_POLARITY_INVERSE 1 34 35#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 36#define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 37#define PSB_BLC_PWM_PRECISION_FACTOR (10) 38#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 39#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 40 41struct psb_intel_lvds_priv { 42 /* 43 * Saved LVDO output states 44 */ 45 uint32_t savePP_ON; 46 uint32_t savePP_OFF; 47 uint32_t saveLVDS; 48 uint32_t savePP_CONTROL; 49 uint32_t savePP_CYCLE; 50 uint32_t savePFIT_CONTROL; 51 uint32_t savePFIT_PGM_RATIOS; 52 uint32_t saveBLC_PWM_CTL; 53 54 struct gma_i2c_chan *i2c_bus; 55}; 56 57 58/* 59 * Returns the maximum level of the backlight duty cycle field. 60 */ 61static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev) 62{ 63 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 64 u32 ret; 65 66 if (gma_power_begin(dev, false)) { 67 ret = REG_READ(BLC_PWM_CTL); 68 gma_power_end(dev); 69 } else /* Powered off, use the saved value */ 70 ret = dev_priv->regs.saveBLC_PWM_CTL; 71 72 /* Top 15bits hold the frequency mask */ 73 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >> 74 BACKLIGHT_MODULATION_FREQ_SHIFT; 75 76 ret *= 2; /* Return a 16bit range as needed for setting */ 77 if (ret == 0) 78 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n", 79 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL); 80 return ret; 81} 82 83/* 84 * Set LVDS backlight level by I2C command 85 * 86 * FIXME: at some point we need to both track this for PM and also 87 * disable runtime pm on MRST if the brightness is nil (ie blanked) 88 */ 89static int psb_lvds_i2c_set_brightness(struct drm_device *dev, 90 unsigned int level) 91{ 92 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 93 94 struct gma_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 95 u8 out_buf[2]; 96 unsigned int blc_i2c_brightness; 97 98 struct i2c_msg msgs[] = { 99 { 100 .addr = lvds_i2c_bus->slave_addr, 101 .flags = 0, 102 .len = 2, 103 .buf = out_buf, 104 } 105 }; 106 107 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 108 BRIGHTNESS_MASK / 109 BRIGHTNESS_MAX_LEVEL); 110 111 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 112 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 113 114 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 115 out_buf[1] = (u8)blc_i2c_brightness; 116 117 if (i2c_transfer(&lvds_i2c_bus->base, msgs, 1) == 1) { 118 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n", 119 dev_priv->lvds_bl->brightnesscmd, 120 blc_i2c_brightness); 121 return 0; 122 } 123 124 dev_err(dev->dev, "I2C transfer error\n"); 125 return -1; 126} 127 128 129static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level) 130{ 131 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 132 133 u32 max_pwm_blc; 134 u32 blc_pwm_duty_cycle; 135 136 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev); 137 138 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 139 BUG_ON(max_pwm_blc == 0); 140 141 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 142 143 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 144 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 145 146 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 147 REG_WRITE(BLC_PWM_CTL, 148 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 149 (blc_pwm_duty_cycle)); 150 151 dev_info(dev->dev, "Backlight lvds set brightness %08x\n", 152 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 153 (blc_pwm_duty_cycle)); 154 155 return 0; 156} 157 158/* 159 * Set LVDS backlight level either by I2C or PWM 160 */ 161void psb_intel_lvds_set_brightness(struct drm_device *dev, int level) 162{ 163 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 164 165 dev_dbg(dev->dev, "backlight level is %d\n", level); 166 167 if (!dev_priv->lvds_bl) { 168 dev_err(dev->dev, "NO LVDS backlight info\n"); 169 return; 170 } 171 172 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 173 psb_lvds_i2c_set_brightness(dev, level); 174 else 175 psb_lvds_pwm_set_brightness(dev, level); 176} 177 178/* 179 * Sets the backlight level. 180 * 181 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight(). 182 */ 183static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level) 184{ 185 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 186 u32 blc_pwm_ctl; 187 188 if (gma_power_begin(dev, false)) { 189 blc_pwm_ctl = REG_READ(BLC_PWM_CTL); 190 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; 191 REG_WRITE(BLC_PWM_CTL, 192 (blc_pwm_ctl | 193 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 194 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 195 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 196 gma_power_end(dev); 197 } else { 198 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 199 ~BACKLIGHT_DUTY_CYCLE_MASK; 200 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 201 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 202 } 203} 204 205/* 206 * Sets the power state for the panel. 207 */ 208static void psb_intel_lvds_set_power(struct drm_device *dev, bool on) 209{ 210 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 211 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 212 u32 pp_status; 213 214 if (!gma_power_begin(dev, true)) { 215 dev_err(dev->dev, "set power, chip off!\n"); 216 return; 217 } 218 219 if (on) { 220 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 221 POWER_TARGET_ON); 222 do { 223 pp_status = REG_READ(PP_STATUS); 224 } while ((pp_status & PP_ON) == 0); 225 226 psb_intel_lvds_set_backlight(dev, 227 mode_dev->backlight_duty_cycle); 228 } else { 229 psb_intel_lvds_set_backlight(dev, 0); 230 231 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); 236 } 237 238 gma_power_end(dev); 239} 240 241static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 242{ 243 struct drm_device *dev = encoder->dev; 244 245 if (mode == DRM_MODE_DPMS_ON) 246 psb_intel_lvds_set_power(dev, true); 247 else 248 psb_intel_lvds_set_power(dev, false); 249 250 /* XXX: We never power down the LVDS pairs. */ 251} 252 253static void psb_intel_lvds_save(struct drm_connector *connector) 254{ 255 struct drm_device *dev = connector->dev; 256 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 257 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 258 struct psb_intel_lvds_priv *lvds_priv = 259 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 260 261 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON); 262 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF); 263 lvds_priv->saveLVDS = REG_READ(LVDS); 264 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL); 265 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE); 266 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/ 267 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 268 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL); 269 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS); 270 271 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/ 272 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL & 273 BACKLIGHT_DUTY_CYCLE_MASK); 274 275 /* 276 * If the light is off at server startup, 277 * just make it full brightness 278 */ 279 if (dev_priv->backlight_duty_cycle == 0) 280 dev_priv->backlight_duty_cycle = 281 psb_intel_lvds_get_max_backlight(dev); 282 283 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 284 lvds_priv->savePP_ON, 285 lvds_priv->savePP_OFF, 286 lvds_priv->saveLVDS, 287 lvds_priv->savePP_CONTROL, 288 lvds_priv->savePP_CYCLE, 289 lvds_priv->saveBLC_PWM_CTL); 290} 291 292static void psb_intel_lvds_restore(struct drm_connector *connector) 293{ 294 struct drm_device *dev = connector->dev; 295 u32 pp_status; 296 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 297 struct psb_intel_lvds_priv *lvds_priv = 298 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv; 299 300 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 301 lvds_priv->savePP_ON, 302 lvds_priv->savePP_OFF, 303 lvds_priv->saveLVDS, 304 lvds_priv->savePP_CONTROL, 305 lvds_priv->savePP_CYCLE, 306 lvds_priv->saveBLC_PWM_CTL); 307 308 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL); 309 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL); 310 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS); 311 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON); 312 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF); 313 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/ 314 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE); 315 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL); 316 REG_WRITE(LVDS, lvds_priv->saveLVDS); 317 318 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) { 319 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 320 POWER_TARGET_ON); 321 do { 322 pp_status = REG_READ(PP_STATUS); 323 } while ((pp_status & PP_ON) == 0); 324 } else { 325 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 326 ~POWER_TARGET_ON); 327 do { 328 pp_status = REG_READ(PP_STATUS); 329 } while (pp_status & PP_ON); 330 } 331} 332 333enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector, 334 struct drm_display_mode *mode) 335{ 336 struct drm_psb_private *dev_priv = to_drm_psb_private(connector->dev); 337 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 338 struct drm_display_mode *fixed_mode = 339 dev_priv->mode_dev.panel_fixed_mode; 340 341 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 342 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2; 343 344 /* just in case */ 345 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 346 return MODE_NO_DBLESCAN; 347 348 /* just in case */ 349 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 350 return MODE_NO_INTERLACE; 351 352 if (fixed_mode) { 353 if (mode->hdisplay > fixed_mode->hdisplay) 354 return MODE_PANEL; 355 if (mode->vdisplay > fixed_mode->vdisplay) 356 return MODE_PANEL; 357 } 358 return MODE_OK; 359} 360 361bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder, 362 const struct drm_display_mode *mode, 363 struct drm_display_mode *adjusted_mode) 364{ 365 struct drm_device *dev = encoder->dev; 366 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 367 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 368 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc); 369 struct drm_encoder *tmp_encoder; 370 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 371 struct gma_encoder *gma_encoder = to_gma_encoder(encoder); 372 373 if (gma_encoder->type == INTEL_OUTPUT_MIPI2) 374 panel_fixed_mode = mode_dev->panel_fixed_mode2; 375 376 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */ 377 if (!IS_MRST(dev) && gma_crtc->pipe == 0) { 378 pr_err("Can't support LVDS on pipe A\n"); 379 return false; 380 } 381 if (IS_MRST(dev) && gma_crtc->pipe != 0) { 382 pr_err("Must use PIPE A\n"); 383 return false; 384 } 385 /* Should never happen!! */ 386 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 387 head) { 388 if (tmp_encoder != encoder 389 && tmp_encoder->crtc == encoder->crtc) { 390 pr_err("Can't enable LVDS and another encoder on the same pipe\n"); 391 return false; 392 } 393 } 394 395 /* 396 * If we have timings from the BIOS for the panel, put them in 397 * to the adjusted mode. The CRTC will be set up for this mode, 398 * with the panel scaling set up to source from the H/VDisplay 399 * of the original mode. 400 */ 401 if (panel_fixed_mode != NULL) { 402 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 403 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 404 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 405 adjusted_mode->htotal = panel_fixed_mode->htotal; 406 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 407 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 408 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 409 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 410 adjusted_mode->clock = panel_fixed_mode->clock; 411 drm_mode_set_crtcinfo(adjusted_mode, 412 CRTC_INTERLACE_HALVE_V); 413 } 414 415 /* 416 * XXX: It would be nice to support lower refresh rates on the 417 * panels to reduce power consumption, and perhaps match the 418 * user's requested refresh rate. 419 */ 420 421 return true; 422} 423 424static void psb_intel_lvds_prepare(struct drm_encoder *encoder) 425{ 426 struct drm_device *dev = encoder->dev; 427 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 428 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 429 430 if (!gma_power_begin(dev, true)) 431 return; 432 433 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 434 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 435 BACKLIGHT_DUTY_CYCLE_MASK); 436 437 psb_intel_lvds_set_power(dev, false); 438 439 gma_power_end(dev); 440} 441 442static void psb_intel_lvds_commit(struct drm_encoder *encoder) 443{ 444 struct drm_device *dev = encoder->dev; 445 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 446 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 447 448 if (mode_dev->backlight_duty_cycle == 0) 449 mode_dev->backlight_duty_cycle = 450 psb_intel_lvds_get_max_backlight(dev); 451 452 psb_intel_lvds_set_power(dev, true); 453} 454 455static void psb_intel_lvds_mode_set(struct drm_encoder *encoder, 456 struct drm_display_mode *mode, 457 struct drm_display_mode *adjusted_mode) 458{ 459 struct drm_device *dev = encoder->dev; 460 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 461 u32 pfit_control; 462 463 /* 464 * The LVDS pin pair will already have been turned on in the 465 * psb_intel_crtc_mode_set since it has a large impact on the DPLL 466 * settings. 467 */ 468 469 /* 470 * Enable automatic panel scaling so that non-native modes fill the 471 * screen. Should be enabled before the pipe is enabled, according to 472 * register description and PRM. 473 */ 474 if (mode->hdisplay != adjusted_mode->hdisplay || 475 mode->vdisplay != adjusted_mode->vdisplay) 476 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 477 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 478 HORIZ_INTERP_BILINEAR); 479 else 480 pfit_control = 0; 481 482 if (dev_priv->lvds_dither) 483 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 484 485 REG_WRITE(PFIT_CONTROL, pfit_control); 486} 487 488/* 489 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 490 */ 491static int psb_intel_lvds_get_modes(struct drm_connector *connector) 492{ 493 struct drm_device *dev = connector->dev; 494 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 495 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 496 int ret = 0; 497 498 if (!IS_MRST(dev)) 499 ret = psb_intel_ddc_get_modes(connector, connector->ddc); 500 501 if (ret) 502 return ret; 503 504 if (mode_dev->panel_fixed_mode != NULL) { 505 struct drm_display_mode *mode = 506 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 507 drm_mode_probed_add(connector, mode); 508 return 1; 509 } 510 511 return 0; 512} 513 514void psb_intel_lvds_destroy(struct drm_connector *connector) 515{ 516 struct gma_connector *gma_connector = to_gma_connector(connector); 517 struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc); 518 519 gma_i2c_destroy(ddc_bus); 520 drm_connector_cleanup(connector); 521 kfree(gma_connector); 522} 523 524int psb_intel_lvds_set_property(struct drm_connector *connector, 525 struct drm_property *property, 526 uint64_t value) 527{ 528 struct drm_encoder *encoder = connector->encoder; 529 530 if (!encoder) 531 return -1; 532 533 if (!strcmp(property->name, "scaling mode")) { 534 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc); 535 uint64_t curval; 536 537 if (!crtc) 538 goto set_prop_error; 539 540 switch (value) { 541 case DRM_MODE_SCALE_FULLSCREEN: 542 break; 543 case DRM_MODE_SCALE_NO_SCALE: 544 break; 545 case DRM_MODE_SCALE_ASPECT: 546 break; 547 default: 548 goto set_prop_error; 549 } 550 551 if (drm_object_property_get_value(&connector->base, 552 property, 553 &curval)) 554 goto set_prop_error; 555 556 if (curval == value) 557 goto set_prop_done; 558 559 if (drm_object_property_set_value(&connector->base, 560 property, 561 value)) 562 goto set_prop_error; 563 564 if (crtc->saved_mode.hdisplay != 0 && 565 crtc->saved_mode.vdisplay != 0) { 566 if (!drm_crtc_helper_set_mode(encoder->crtc, 567 &crtc->saved_mode, 568 encoder->crtc->x, 569 encoder->crtc->y, 570 encoder->crtc->primary->fb)) 571 goto set_prop_error; 572 } 573 } else if (!strcmp(property->name, "backlight")) { 574 if (drm_object_property_set_value(&connector->base, 575 property, 576 value)) 577 goto set_prop_error; 578 else 579 gma_backlight_set(encoder->dev, value); 580 } else if (!strcmp(property->name, "DPMS")) { 581 const struct drm_encoder_helper_funcs *hfuncs 582 = encoder->helper_private; 583 hfuncs->dpms(encoder, value); 584 } 585 586set_prop_done: 587 return 0; 588set_prop_error: 589 return -1; 590} 591 592static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { 593 .dpms = psb_intel_lvds_encoder_dpms, 594 .mode_fixup = psb_intel_lvds_mode_fixup, 595 .prepare = psb_intel_lvds_prepare, 596 .mode_set = psb_intel_lvds_mode_set, 597 .commit = psb_intel_lvds_commit, 598}; 599 600const struct drm_connector_helper_funcs 601 psb_intel_lvds_connector_helper_funcs = { 602 .get_modes = psb_intel_lvds_get_modes, 603 .mode_valid = psb_intel_lvds_mode_valid, 604 .best_encoder = gma_best_encoder, 605}; 606 607const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { 608 .dpms = drm_helper_connector_dpms, 609 .fill_modes = drm_helper_probe_single_connector_modes, 610 .set_property = psb_intel_lvds_set_property, 611 .destroy = psb_intel_lvds_destroy, 612}; 613 614/** 615 * psb_intel_lvds_init - setup LVDS connectors on this device 616 * @dev: drm device 617 * @mode_dev: mode device 618 * 619 * Create the connector, register the LVDS DDC bus, and try to figure out what 620 * modes we can display on the LVDS panel (if present). 621 */ 622void psb_intel_lvds_init(struct drm_device *dev, 623 struct psb_intel_mode_device *mode_dev) 624{ 625 struct gma_encoder *gma_encoder; 626 struct gma_connector *gma_connector; 627 struct psb_intel_lvds_priv *lvds_priv; 628 struct drm_connector *connector; 629 struct drm_encoder *encoder; 630 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 631 struct drm_crtc *crtc; 632 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 633 struct gma_i2c_chan *ddc_bus; 634 u32 lvds; 635 int pipe; 636 int ret; 637 638 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 639 if (!gma_encoder) { 640 dev_err(dev->dev, "gma_encoder allocation error\n"); 641 return; 642 } 643 encoder = &gma_encoder->base; 644 645 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 646 if (!gma_connector) { 647 dev_err(dev->dev, "gma_connector allocation error\n"); 648 goto err_free_encoder; 649 } 650 651 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); 652 if (!lvds_priv) { 653 dev_err(dev->dev, "LVDS private allocation error\n"); 654 goto err_free_connector; 655 } 656 657 gma_encoder->dev_priv = lvds_priv; 658 659 connector = &gma_connector->base; 660 gma_connector->save = psb_intel_lvds_save; 661 gma_connector->restore = psb_intel_lvds_restore; 662 663 /* Set up the DDC bus. */ 664 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C"); 665 if (!ddc_bus) { 666 dev_printk(KERN_ERR, dev->dev, 667 "DDC bus registration " "failed.\n"); 668 goto err_free_lvds_priv; 669 } 670 671 ret = drm_connector_init_with_ddc(dev, connector, 672 &psb_intel_lvds_connector_funcs, 673 DRM_MODE_CONNECTOR_LVDS, 674 &ddc_bus->base); 675 if (ret) 676 goto err_ddc_destroy; 677 678 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS); 679 if (ret) 680 goto err_connector_cleanup; 681 682 gma_connector_attach_encoder(gma_connector, gma_encoder); 683 gma_encoder->type = INTEL_OUTPUT_LVDS; 684 685 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); 686 drm_connector_helper_add(connector, 687 &psb_intel_lvds_connector_helper_funcs); 688 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 689 connector->interlace_allowed = false; 690 connector->doublescan_allowed = false; 691 692 /*Attach connector properties*/ 693 drm_object_attach_property(&connector->base, 694 dev->mode_config.scaling_mode_property, 695 DRM_MODE_SCALE_FULLSCREEN); 696 drm_object_attach_property(&connector->base, 697 dev_priv->backlight_property, 698 BRIGHTNESS_MAX_LEVEL); 699 700 /* 701 * Set up I2C bus 702 * FIXME: distroy i2c_bus when exit 703 */ 704 lvds_priv->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B"); 705 if (!lvds_priv->i2c_bus) { 706 dev_printk(KERN_ERR, 707 dev->dev, "I2C bus registration failed.\n"); 708 goto err_encoder_cleanup; 709 } 710 lvds_priv->i2c_bus->slave_addr = 0x2C; 711 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; 712 713 /* 714 * LVDS discovery: 715 * 1) check for EDID on DDC 716 * 2) check for VBT data 717 * 3) check to see if LVDS is already on 718 * if none of the above, no panel 719 * 4) make sure lid is open 720 * if closed, act like it's not there for now 721 */ 722 723 /* 724 * Attempt to get the fixed panel mode from DDC. Assume that the 725 * preferred mode is the right one. 726 */ 727 mutex_lock(&dev->mode_config.mutex); 728 psb_intel_ddc_get_modes(connector, &ddc_bus->base); 729 730 list_for_each_entry(scan, &connector->probed_modes, head) { 731 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 732 mode_dev->panel_fixed_mode = 733 drm_mode_duplicate(dev, scan); 734 DRM_DEBUG_KMS("Using mode from DDC\n"); 735 goto out; /* FIXME: check for quirks */ 736 } 737 } 738 739 /* Failed to get EDID, what about VBT? do we need this? */ 740 if (dev_priv->lfp_lvds_vbt_mode) { 741 mode_dev->panel_fixed_mode = 742 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); 743 744 if (mode_dev->panel_fixed_mode) { 745 mode_dev->panel_fixed_mode->type |= 746 DRM_MODE_TYPE_PREFERRED; 747 DRM_DEBUG_KMS("Using mode from VBT\n"); 748 goto out; 749 } 750 } 751 752 /* 753 * If we didn't get EDID, try checking if the panel is already turned 754 * on. If so, assume that whatever is currently programmed is the 755 * correct mode. 756 */ 757 lvds = REG_READ(LVDS); 758 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 759 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 760 761 if (crtc && (lvds & LVDS_PORT_EN)) { 762 mode_dev->panel_fixed_mode = 763 psb_intel_crtc_mode_get(dev, crtc); 764 if (mode_dev->panel_fixed_mode) { 765 mode_dev->panel_fixed_mode->type |= 766 DRM_MODE_TYPE_PREFERRED; 767 DRM_DEBUG_KMS("Using pre-programmed mode\n"); 768 goto out; /* FIXME: check for quirks */ 769 } 770 } 771 772 /* If we still don't have a mode after all that, give up. */ 773 if (!mode_dev->panel_fixed_mode) { 774 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); 775 goto err_unlock; 776 } 777 778 /* 779 * Blacklist machines with BIOSes that list an LVDS panel without 780 * actually having one. 781 */ 782out: 783 mutex_unlock(&dev->mode_config.mutex); 784 return; 785 786err_unlock: 787 mutex_unlock(&dev->mode_config.mutex); 788 gma_i2c_destroy(lvds_priv->i2c_bus); 789err_encoder_cleanup: 790 drm_encoder_cleanup(encoder); 791err_connector_cleanup: 792 drm_connector_cleanup(connector); 793err_ddc_destroy: 794 gma_i2c_destroy(ddc_bus); 795err_free_lvds_priv: 796 kfree(lvds_priv); 797err_free_connector: 798 kfree(gma_connector); 799err_free_encoder: 800 kfree(gma_encoder); 801} 802 803