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