1/* 2 * Copyright © 2006-2007 Intel Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License along with 14 * this program; if not, write to the Free Software Foundation, Inc., 15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 * Authors: 18 * Eric Anholt <eric@anholt.net> 19 * Dave Airlie <airlied@linux.ie> 20 * Jesse Barnes <jesse.barnes@intel.com> 21 */ 22 23#include <linux/i2c.h> 24#include <drm/drmP.h> 25 26#include "intel_bios.h" 27#include "psb_drv.h" 28#include "psb_intel_drv.h" 29#include "psb_intel_reg.h" 30#include "power.h" 31#include <linux/pm_runtime.h> 32 33/* 34 * LVDS I2C backlight control macros 35 */ 36#define BRIGHTNESS_MAX_LEVEL 100 37#define BRIGHTNESS_MASK 0xFF 38#define BLC_I2C_TYPE 0x01 39#define BLC_PWM_TYPT 0x02 40 41#define BLC_POLARITY_NORMAL 0 42#define BLC_POLARITY_INVERSE 1 43 44#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) 45#define PSB_BLC_MIN_PWM_REG_FREQ (0x2) 46#define PSB_BLC_PWM_PRECISION_FACTOR (10) 47#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) 48#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) 49 50struct psb_intel_lvds_priv { 51 /* 52 * Saved LVDO output states 53 */ 54 uint32_t savePP_ON; 55 uint32_t savePP_OFF; 56 uint32_t saveLVDS; 57 uint32_t savePP_CONTROL; 58 uint32_t savePP_CYCLE; 59 uint32_t savePFIT_CONTROL; 60 uint32_t savePFIT_PGM_RATIOS; 61 uint32_t saveBLC_PWM_CTL; 62 63 struct psb_intel_i2c_chan *i2c_bus; 64 struct psb_intel_i2c_chan *ddc_bus; 65}; 66 67 68/* 69 * Returns the maximum level of the backlight duty cycle field. 70 */ 71static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev) 72{ 73 struct drm_psb_private *dev_priv = dev->dev_private; 74 u32 ret; 75 76 if (gma_power_begin(dev, false)) { 77 ret = REG_READ(BLC_PWM_CTL); 78 gma_power_end(dev); 79 } else /* Powered off, use the saved value */ 80 ret = dev_priv->regs.saveBLC_PWM_CTL; 81 82 /* Top 15bits hold the frequency mask */ 83 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >> 84 BACKLIGHT_MODULATION_FREQ_SHIFT; 85 86 ret *= 2; /* Return a 16bit range as needed for setting */ 87 if (ret == 0) 88 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n", 89 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL); 90 return ret; 91} 92 93/* 94 * Set LVDS backlight level by I2C command 95 * 96 * FIXME: at some point we need to both track this for PM and also 97 * disable runtime pm on MRST if the brightness is nil (ie blanked) 98 */ 99static int psb_lvds_i2c_set_brightness(struct drm_device *dev, 100 unsigned int level) 101{ 102 struct drm_psb_private *dev_priv = 103 (struct drm_psb_private *)dev->dev_private; 104 105 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; 106 u8 out_buf[2]; 107 unsigned int blc_i2c_brightness; 108 109 struct i2c_msg msgs[] = { 110 { 111 .addr = lvds_i2c_bus->slave_addr, 112 .flags = 0, 113 .len = 2, 114 .buf = out_buf, 115 } 116 }; 117 118 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * 119 BRIGHTNESS_MASK / 120 BRIGHTNESS_MAX_LEVEL); 121 122 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 123 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; 124 125 out_buf[0] = dev_priv->lvds_bl->brightnesscmd; 126 out_buf[1] = (u8)blc_i2c_brightness; 127 128 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) { 129 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n", 130 dev_priv->lvds_bl->brightnesscmd, 131 blc_i2c_brightness); 132 return 0; 133 } 134 135 dev_err(dev->dev, "I2C transfer error\n"); 136 return -1; 137} 138 139 140static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level) 141{ 142 struct drm_psb_private *dev_priv = 143 (struct drm_psb_private *)dev->dev_private; 144 145 u32 max_pwm_blc; 146 u32 blc_pwm_duty_cycle; 147 148 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev); 149 150 /*BLC_PWM_CTL Should be initiated while backlight device init*/ 151 BUG_ON(max_pwm_blc == 0); 152 153 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; 154 155 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) 156 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; 157 158 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; 159 REG_WRITE(BLC_PWM_CTL, 160 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 161 (blc_pwm_duty_cycle)); 162 163 dev_info(dev->dev, "Backlight lvds set brightness %08x\n", 164 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | 165 (blc_pwm_duty_cycle)); 166 167 return 0; 168} 169 170/* 171 * Set LVDS backlight level either by I2C or PWM 172 */ 173void psb_intel_lvds_set_brightness(struct drm_device *dev, int level) 174{ 175 struct drm_psb_private *dev_priv = dev->dev_private; 176 177 dev_dbg(dev->dev, "backlight level is %d\n", level); 178 179 if (!dev_priv->lvds_bl) { 180 dev_err(dev->dev, "NO LVDS backlight info\n"); 181 return; 182 } 183 184 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) 185 psb_lvds_i2c_set_brightness(dev, level); 186 else 187 psb_lvds_pwm_set_brightness(dev, level); 188} 189 190/* 191 * Sets the backlight level. 192 * 193 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight(). 194 */ 195static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level) 196{ 197 struct drm_psb_private *dev_priv = dev->dev_private; 198 u32 blc_pwm_ctl; 199 200 if (gma_power_begin(dev, false)) { 201 blc_pwm_ctl = REG_READ(BLC_PWM_CTL); 202 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; 203 REG_WRITE(BLC_PWM_CTL, 204 (blc_pwm_ctl | 205 (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); 206 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 207 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 208 gma_power_end(dev); 209 } else { 210 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL & 211 ~BACKLIGHT_DUTY_CYCLE_MASK; 212 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl | 213 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); 214 } 215} 216 217/* 218 * Sets the power state for the panel. 219 */ 220static void psb_intel_lvds_set_power(struct drm_device *dev, bool on) 221{ 222 struct drm_psb_private *dev_priv = dev->dev_private; 223 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 224 u32 pp_status; 225 226 if (!gma_power_begin(dev, true)) { 227 dev_err(dev->dev, "set power, chip off!\n"); 228 return; 229 } 230 231 if (on) { 232 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 233 POWER_TARGET_ON); 234 do { 235 pp_status = REG_READ(PP_STATUS); 236 } while ((pp_status & PP_ON) == 0); 237 238 psb_intel_lvds_set_backlight(dev, 239 mode_dev->backlight_duty_cycle); 240 } else { 241 psb_intel_lvds_set_backlight(dev, 0); 242 243 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 244 ~POWER_TARGET_ON); 245 do { 246 pp_status = REG_READ(PP_STATUS); 247 } while (pp_status & PP_ON); 248 } 249 250 gma_power_end(dev); 251} 252 253static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) 254{ 255 struct drm_device *dev = encoder->dev; 256 257 if (mode == DRM_MODE_DPMS_ON) 258 psb_intel_lvds_set_power(dev, true); 259 else 260 psb_intel_lvds_set_power(dev, false); 261 262 /* XXX: We never power down the LVDS pairs. */ 263} 264 265static void psb_intel_lvds_save(struct drm_connector *connector) 266{ 267 struct drm_device *dev = connector->dev; 268 struct drm_psb_private *dev_priv = 269 (struct drm_psb_private *)dev->dev_private; 270 struct psb_intel_encoder *psb_intel_encoder = 271 psb_intel_attached_encoder(connector); 272 struct psb_intel_lvds_priv *lvds_priv = 273 (struct psb_intel_lvds_priv *)psb_intel_encoder->dev_priv; 274 275 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON); 276 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF); 277 lvds_priv->saveLVDS = REG_READ(LVDS); 278 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL); 279 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE); 280 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/ 281 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 282 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL); 283 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS); 284 285 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/ 286 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL & 287 BACKLIGHT_DUTY_CYCLE_MASK); 288 289 /* 290 * If the light is off at server startup, 291 * just make it full brightness 292 */ 293 if (dev_priv->backlight_duty_cycle == 0) 294 dev_priv->backlight_duty_cycle = 295 psb_intel_lvds_get_max_backlight(dev); 296 297 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 298 lvds_priv->savePP_ON, 299 lvds_priv->savePP_OFF, 300 lvds_priv->saveLVDS, 301 lvds_priv->savePP_CONTROL, 302 lvds_priv->savePP_CYCLE, 303 lvds_priv->saveBLC_PWM_CTL); 304} 305 306static void psb_intel_lvds_restore(struct drm_connector *connector) 307{ 308 struct drm_device *dev = connector->dev; 309 u32 pp_status; 310 struct psb_intel_encoder *psb_intel_encoder = 311 psb_intel_attached_encoder(connector); 312 struct psb_intel_lvds_priv *lvds_priv = 313 (struct psb_intel_lvds_priv *)psb_intel_encoder->dev_priv; 314 315 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", 316 lvds_priv->savePP_ON, 317 lvds_priv->savePP_OFF, 318 lvds_priv->saveLVDS, 319 lvds_priv->savePP_CONTROL, 320 lvds_priv->savePP_CYCLE, 321 lvds_priv->saveBLC_PWM_CTL); 322 323 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL); 324 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL); 325 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS); 326 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON); 327 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF); 328 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/ 329 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE); 330 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL); 331 REG_WRITE(LVDS, lvds_priv->saveLVDS); 332 333 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) { 334 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | 335 POWER_TARGET_ON); 336 do { 337 pp_status = REG_READ(PP_STATUS); 338 } while ((pp_status & PP_ON) == 0); 339 } else { 340 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & 341 ~POWER_TARGET_ON); 342 do { 343 pp_status = REG_READ(PP_STATUS); 344 } while (pp_status & PP_ON); 345 } 346} 347 348int psb_intel_lvds_mode_valid(struct drm_connector *connector, 349 struct drm_display_mode *mode) 350{ 351 struct drm_psb_private *dev_priv = connector->dev->dev_private; 352 struct psb_intel_encoder *psb_intel_encoder = 353 psb_intel_attached_encoder(connector); 354 struct drm_display_mode *fixed_mode = 355 dev_priv->mode_dev.panel_fixed_mode; 356 357 if (psb_intel_encoder->type == INTEL_OUTPUT_MIPI2) 358 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2; 359 360 /* just in case */ 361 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 362 return MODE_NO_DBLESCAN; 363 364 /* just in case */ 365 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 366 return MODE_NO_INTERLACE; 367 368 if (fixed_mode) { 369 if (mode->hdisplay > fixed_mode->hdisplay) 370 return MODE_PANEL; 371 if (mode->vdisplay > fixed_mode->vdisplay) 372 return MODE_PANEL; 373 } 374 return MODE_OK; 375} 376 377bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder, 378 struct drm_display_mode *mode, 379 struct drm_display_mode *adjusted_mode) 380{ 381 struct drm_device *dev = encoder->dev; 382 struct drm_psb_private *dev_priv = dev->dev_private; 383 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 384 struct psb_intel_crtc *psb_intel_crtc = 385 to_psb_intel_crtc(encoder->crtc); 386 struct drm_encoder *tmp_encoder; 387 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; 388 struct psb_intel_encoder *psb_intel_encoder = 389 to_psb_intel_encoder(encoder); 390 391 if (psb_intel_encoder->type == INTEL_OUTPUT_MIPI2) 392 panel_fixed_mode = mode_dev->panel_fixed_mode2; 393 394 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */ 395 if (!IS_MRST(dev) && psb_intel_crtc->pipe == 0) { 396 printk(KERN_ERR "Can't support LVDS on pipe A\n"); 397 return false; 398 } 399 if (IS_MRST(dev) && psb_intel_crtc->pipe != 0) { 400 printk(KERN_ERR "Must use PIPE A\n"); 401 return false; 402 } 403 /* Should never happen!! */ 404 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, 405 head) { 406 if (tmp_encoder != encoder 407 && tmp_encoder->crtc == encoder->crtc) { 408 printk(KERN_ERR "Can't enable LVDS and another " 409 "encoder on the same pipe\n"); 410 return false; 411 } 412 } 413 414 /* 415 * If we have timings from the BIOS for the panel, put them in 416 * to the adjusted mode. The CRTC will be set up for this mode, 417 * with the panel scaling set up to source from the H/VDisplay 418 * of the original mode. 419 */ 420 if (panel_fixed_mode != NULL) { 421 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; 422 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; 423 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; 424 adjusted_mode->htotal = panel_fixed_mode->htotal; 425 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; 426 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; 427 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; 428 adjusted_mode->vtotal = panel_fixed_mode->vtotal; 429 adjusted_mode->clock = panel_fixed_mode->clock; 430 drm_mode_set_crtcinfo(adjusted_mode, 431 CRTC_INTERLACE_HALVE_V); 432 } 433 434 /* 435 * XXX: It would be nice to support lower refresh rates on the 436 * panels to reduce power consumption, and perhaps match the 437 * user's requested refresh rate. 438 */ 439 440 return true; 441} 442 443static void psb_intel_lvds_prepare(struct drm_encoder *encoder) 444{ 445 struct drm_device *dev = encoder->dev; 446 struct drm_psb_private *dev_priv = dev->dev_private; 447 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 448 449 if (!gma_power_begin(dev, true)) 450 return; 451 452 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); 453 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & 454 BACKLIGHT_DUTY_CYCLE_MASK); 455 456 psb_intel_lvds_set_power(dev, false); 457 458 gma_power_end(dev); 459} 460 461static void psb_intel_lvds_commit(struct drm_encoder *encoder) 462{ 463 struct drm_device *dev = encoder->dev; 464 struct drm_psb_private *dev_priv = dev->dev_private; 465 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 466 467 if (mode_dev->backlight_duty_cycle == 0) 468 mode_dev->backlight_duty_cycle = 469 psb_intel_lvds_get_max_backlight(dev); 470 471 psb_intel_lvds_set_power(dev, true); 472} 473 474static void psb_intel_lvds_mode_set(struct drm_encoder *encoder, 475 struct drm_display_mode *mode, 476 struct drm_display_mode *adjusted_mode) 477{ 478 struct drm_device *dev = encoder->dev; 479 struct drm_psb_private *dev_priv = dev->dev_private; 480 u32 pfit_control; 481 482 /* 483 * The LVDS pin pair will already have been turned on in the 484 * psb_intel_crtc_mode_set since it has a large impact on the DPLL 485 * settings. 486 */ 487 488 /* 489 * Enable automatic panel scaling so that non-native modes fill the 490 * screen. Should be enabled before the pipe is enabled, according to 491 * register description and PRM. 492 */ 493 if (mode->hdisplay != adjusted_mode->hdisplay || 494 mode->vdisplay != adjusted_mode->vdisplay) 495 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | 496 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | 497 HORIZ_INTERP_BILINEAR); 498 else 499 pfit_control = 0; 500 501 if (dev_priv->lvds_dither) 502 pfit_control |= PANEL_8TO6_DITHER_ENABLE; 503 504 REG_WRITE(PFIT_CONTROL, pfit_control); 505} 506 507/* 508 * Detect the LVDS connection. 509 * 510 * This always returns CONNECTOR_STATUS_CONNECTED. 511 * This connector should only have 512 * been set up if the LVDS was actually connected anyway. 513 */ 514static enum drm_connector_status psb_intel_lvds_detect(struct drm_connector 515 *connector, bool force) 516{ 517 return connector_status_connected; 518} 519 520/* 521 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. 522 */ 523static int psb_intel_lvds_get_modes(struct drm_connector *connector) 524{ 525 struct drm_device *dev = connector->dev; 526 struct drm_psb_private *dev_priv = dev->dev_private; 527 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; 528 struct psb_intel_encoder *psb_intel_encoder = 529 psb_intel_attached_encoder(connector); 530 struct psb_intel_lvds_priv *lvds_priv = psb_intel_encoder->dev_priv; 531 int ret = 0; 532 533 if (!IS_MRST(dev)) 534 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter); 535 536 if (ret) 537 return ret; 538 539 /* Didn't get an EDID, so 540 * Set wide sync ranges so we get all modes 541 * handed to valid_mode for checking 542 */ 543 connector->display_info.min_vfreq = 0; 544 connector->display_info.max_vfreq = 200; 545 connector->display_info.min_hfreq = 0; 546 connector->display_info.max_hfreq = 200; 547 548 if (mode_dev->panel_fixed_mode != NULL) { 549 struct drm_display_mode *mode = 550 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); 551 drm_mode_probed_add(connector, mode); 552 return 1; 553 } 554 555 return 0; 556} 557 558/** 559 * psb_intel_lvds_destroy - unregister and free LVDS structures 560 * @connector: connector to free 561 * 562 * Unregister the DDC bus for this connector then free the driver private 563 * structure. 564 */ 565void psb_intel_lvds_destroy(struct drm_connector *connector) 566{ 567 struct psb_intel_encoder *psb_intel_encoder = 568 psb_intel_attached_encoder(connector); 569 struct psb_intel_lvds_priv *lvds_priv = psb_intel_encoder->dev_priv; 570 571 if (lvds_priv->ddc_bus) 572 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 573 drm_sysfs_connector_remove(connector); 574 drm_connector_cleanup(connector); 575 kfree(connector); 576} 577 578int psb_intel_lvds_set_property(struct drm_connector *connector, 579 struct drm_property *property, 580 uint64_t value) 581{ 582 struct drm_encoder *encoder = connector->encoder; 583 584 if (!encoder) 585 return -1; 586 587 if (!strcmp(property->name, "scaling mode")) { 588 struct psb_intel_crtc *crtc = 589 to_psb_intel_crtc(encoder->crtc); 590 uint64_t curval; 591 592 if (!crtc) 593 goto set_prop_error; 594 595 switch (value) { 596 case DRM_MODE_SCALE_FULLSCREEN: 597 break; 598 case DRM_MODE_SCALE_NO_SCALE: 599 break; 600 case DRM_MODE_SCALE_ASPECT: 601 break; 602 default: 603 goto set_prop_error; 604 } 605 606 if (drm_connector_property_get_value(connector, 607 property, 608 &curval)) 609 goto set_prop_error; 610 611 if (curval == value) 612 goto set_prop_done; 613 614 if (drm_connector_property_set_value(connector, 615 property, 616 value)) 617 goto set_prop_error; 618 619 if (crtc->saved_mode.hdisplay != 0 && 620 crtc->saved_mode.vdisplay != 0) { 621 if (!drm_crtc_helper_set_mode(encoder->crtc, 622 &crtc->saved_mode, 623 encoder->crtc->x, 624 encoder->crtc->y, 625 encoder->crtc->fb)) 626 goto set_prop_error; 627 } 628 } else if (!strcmp(property->name, "backlight")) { 629 if (drm_connector_property_set_value(connector, 630 property, 631 value)) 632 goto set_prop_error; 633 else { 634#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE 635 struct drm_psb_private *devp = 636 encoder->dev->dev_private; 637 struct backlight_device *bd = devp->backlight_device; 638 if (bd) { 639 bd->props.brightness = value; 640 backlight_update_status(bd); 641 } 642#endif 643 } 644 } else if (!strcmp(property->name, "DPMS")) { 645 struct drm_encoder_helper_funcs *hfuncs 646 = encoder->helper_private; 647 hfuncs->dpms(encoder, value); 648 } 649 650set_prop_done: 651 return 0; 652set_prop_error: 653 return -1; 654} 655 656static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { 657 .dpms = psb_intel_lvds_encoder_dpms, 658 .mode_fixup = psb_intel_lvds_mode_fixup, 659 .prepare = psb_intel_lvds_prepare, 660 .mode_set = psb_intel_lvds_mode_set, 661 .commit = psb_intel_lvds_commit, 662}; 663 664const struct drm_connector_helper_funcs 665 psb_intel_lvds_connector_helper_funcs = { 666 .get_modes = psb_intel_lvds_get_modes, 667 .mode_valid = psb_intel_lvds_mode_valid, 668 .best_encoder = psb_intel_best_encoder, 669}; 670 671const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { 672 .dpms = drm_helper_connector_dpms, 673 .save = psb_intel_lvds_save, 674 .restore = psb_intel_lvds_restore, 675 .detect = psb_intel_lvds_detect, 676 .fill_modes = drm_helper_probe_single_connector_modes, 677 .set_property = psb_intel_lvds_set_property, 678 .destroy = psb_intel_lvds_destroy, 679}; 680 681 682static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder) 683{ 684 drm_encoder_cleanup(encoder); 685} 686 687const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = { 688 .destroy = psb_intel_lvds_enc_destroy, 689}; 690 691 692 693/** 694 * psb_intel_lvds_init - setup LVDS connectors on this device 695 * @dev: drm device 696 * 697 * Create the connector, register the LVDS DDC bus, and try to figure out what 698 * modes we can display on the LVDS panel (if present). 699 */ 700void psb_intel_lvds_init(struct drm_device *dev, 701 struct psb_intel_mode_device *mode_dev) 702{ 703 struct psb_intel_encoder *psb_intel_encoder; 704 struct psb_intel_connector *psb_intel_connector; 705 struct psb_intel_lvds_priv *lvds_priv; 706 struct drm_connector *connector; 707 struct drm_encoder *encoder; 708 struct drm_display_mode *scan; /* *modes, *bios_mode; */ 709 struct drm_crtc *crtc; 710 struct drm_psb_private *dev_priv = dev->dev_private; 711 u32 lvds; 712 int pipe; 713 714 psb_intel_encoder = 715 kzalloc(sizeof(struct psb_intel_encoder), GFP_KERNEL); 716 if (!psb_intel_encoder) { 717 dev_err(dev->dev, "psb_intel_encoder allocation error\n"); 718 return; 719 } 720 721 psb_intel_connector = 722 kzalloc(sizeof(struct psb_intel_connector), GFP_KERNEL); 723 if (!psb_intel_connector) { 724 dev_err(dev->dev, "psb_intel_connector allocation error\n"); 725 goto failed_encoder; 726 } 727 728 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); 729 if (!lvds_priv) { 730 dev_err(dev->dev, "LVDS private allocation error\n"); 731 goto failed_connector; 732 } 733 734 psb_intel_encoder->dev_priv = lvds_priv; 735 736 connector = &psb_intel_connector->base; 737 encoder = &psb_intel_encoder->base; 738 drm_connector_init(dev, connector, 739 &psb_intel_lvds_connector_funcs, 740 DRM_MODE_CONNECTOR_LVDS); 741 742 drm_encoder_init(dev, encoder, 743 &psb_intel_lvds_enc_funcs, 744 DRM_MODE_ENCODER_LVDS); 745 746 psb_intel_connector_attach_encoder(psb_intel_connector, 747 psb_intel_encoder); 748 psb_intel_encoder->type = INTEL_OUTPUT_LVDS; 749 750 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); 751 drm_connector_helper_add(connector, 752 &psb_intel_lvds_connector_helper_funcs); 753 connector->display_info.subpixel_order = SubPixelHorizontalRGB; 754 connector->interlace_allowed = false; 755 connector->doublescan_allowed = false; 756 757 /*Attach connector properties*/ 758 drm_connector_attach_property(connector, 759 dev->mode_config.scaling_mode_property, 760 DRM_MODE_SCALE_FULLSCREEN); 761 drm_connector_attach_property(connector, 762 dev_priv->backlight_property, 763 BRIGHTNESS_MAX_LEVEL); 764 765 /* 766 * Set up I2C bus 767 * FIXME: distroy i2c_bus when exit 768 */ 769 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B"); 770 if (!lvds_priv->i2c_bus) { 771 dev_printk(KERN_ERR, 772 &dev->pdev->dev, "I2C bus registration failed.\n"); 773 goto failed_blc_i2c; 774 } 775 lvds_priv->i2c_bus->slave_addr = 0x2C; 776 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; 777 778 /* 779 * LVDS discovery: 780 * 1) check for EDID on DDC 781 * 2) check for VBT data 782 * 3) check to see if LVDS is already on 783 * if none of the above, no panel 784 * 4) make sure lid is open 785 * if closed, act like it's not there for now 786 */ 787 788 /* Set up the DDC bus. */ 789 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); 790 if (!lvds_priv->ddc_bus) { 791 dev_printk(KERN_ERR, &dev->pdev->dev, 792 "DDC bus registration " "failed.\n"); 793 goto failed_ddc; 794 } 795 796 /* 797 * Attempt to get the fixed panel mode from DDC. Assume that the 798 * preferred mode is the right one. 799 */ 800 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter); 801 list_for_each_entry(scan, &connector->probed_modes, head) { 802 if (scan->type & DRM_MODE_TYPE_PREFERRED) { 803 mode_dev->panel_fixed_mode = 804 drm_mode_duplicate(dev, scan); 805 goto out; /* FIXME: check for quirks */ 806 } 807 } 808 809 /* Failed to get EDID, what about VBT? do we need this? */ 810 if (mode_dev->vbt_mode) 811 mode_dev->panel_fixed_mode = 812 drm_mode_duplicate(dev, mode_dev->vbt_mode); 813 814 if (!mode_dev->panel_fixed_mode) 815 if (dev_priv->lfp_lvds_vbt_mode) 816 mode_dev->panel_fixed_mode = 817 drm_mode_duplicate(dev, 818 dev_priv->lfp_lvds_vbt_mode); 819 820 /* 821 * If we didn't get EDID, try checking if the panel is already turned 822 * on. If so, assume that whatever is currently programmed is the 823 * correct mode. 824 */ 825 lvds = REG_READ(LVDS); 826 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; 827 crtc = psb_intel_get_crtc_from_pipe(dev, pipe); 828 829 if (crtc && (lvds & LVDS_PORT_EN)) { 830 mode_dev->panel_fixed_mode = 831 psb_intel_crtc_mode_get(dev, crtc); 832 if (mode_dev->panel_fixed_mode) { 833 mode_dev->panel_fixed_mode->type |= 834 DRM_MODE_TYPE_PREFERRED; 835 goto out; /* FIXME: check for quirks */ 836 } 837 } 838 839 /* If we still don't have a mode after all that, give up. */ 840 if (!mode_dev->panel_fixed_mode) { 841 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); 842 goto failed_find; 843 } 844 845 /* 846 * Blacklist machines with BIOSes that list an LVDS panel without 847 * actually having one. 848 */ 849out: 850 drm_sysfs_connector_add(connector); 851 return; 852 853failed_find: 854 if (lvds_priv->ddc_bus) 855 psb_intel_i2c_destroy(lvds_priv->ddc_bus); 856failed_ddc: 857 if (lvds_priv->i2c_bus) 858 psb_intel_i2c_destroy(lvds_priv->i2c_bus); 859failed_blc_i2c: 860 drm_encoder_cleanup(encoder); 861 drm_connector_cleanup(connector); 862failed_connector: 863 kfree(psb_intel_connector); 864failed_encoder: 865 kfree(psb_intel_encoder); 866} 867 868