drivers/staging/gma500/psb_intel_lvds.c

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