drivers/gpu/drm/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         /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
 386         if (!IS_MRST(dev) && psb_intel_crtc->pipe == 0) {
 387                 printk(KERN_ERR "Can't support LVDS on pipe A\n");
 388                 return false;
 389         }
 390         if (IS_MRST(dev) && psb_intel_crtc->pipe != 0) {
 391                 printk(KERN_ERR "Must use PIPE A\n");
 392                 return false;
 393         }
 394         /* Should never happen!! */
 395         list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
 396                             head) {
 397                 if (tmp_encoder != encoder
 398                     && tmp_encoder->crtc == encoder->crtc) {
 399                         printk(KERN_ERR "Can't enable LVDS and another "
 400                                "encoder on the same pipe\n");
 401                         return false;
 402                 }
 403         }
 404
 405         /*
 406          * If we have timings from the BIOS for the panel, put them in
 407          * to the adjusted mode.  The CRTC will be set up for this mode,
 408          * with the panel scaling set up to source from the H/VDisplay
 409          * of the original mode.
 410          */
 411         if (panel_fixed_mode != NULL) {
 412                 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
 413                 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
 414                 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
 415                 adjusted_mode->htotal = panel_fixed_mode->htotal;
 416                 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
 417                 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
 418                 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
 419                 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
 420                 adjusted_mode->clock = panel_fixed_mode->clock;
 421                 drm_mode_set_crtcinfo(adjusted_mode,
 422                                       CRTC_INTERLACE_HALVE_V);
 423         }
 424
 425         /*
 426          * XXX: It would be nice to support lower refresh rates on the
 427          * panels to reduce power consumption, and perhaps match the
 428          * user's requested refresh rate.
 429          */
 430
 431         return true;
 432 }
 433
 434 static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
 435 {
 436         struct drm_device *dev = encoder->dev;
 437         struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
 438         struct psb_intel_mode_device *mode_dev = output->mode_dev;
 439
 440         if (!gma_power_begin(dev, true))
 441                 return;
 442
 443         mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
 444         mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
 445                                           BACKLIGHT_DUTY_CYCLE_MASK);
 446
 447         psb_intel_lvds_set_power(dev, output, false);
 448
 449         gma_power_end(dev);
 450 }
 451
 452 static void psb_intel_lvds_commit(struct drm_encoder *encoder)
 453 {
 454         struct drm_device *dev = encoder->dev;
 455         struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
 456         struct psb_intel_mode_device *mode_dev = output->mode_dev;
 457
 458         if (mode_dev->backlight_duty_cycle == 0)
 459                 mode_dev->backlight_duty_cycle =
 460                     psb_intel_lvds_get_max_backlight(dev);
 461
 462         psb_intel_lvds_set_power(dev, output, true);
 463 }
 464
 465 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
 466                                 struct drm_display_mode *mode,
 467                                 struct drm_display_mode *adjusted_mode)
 468 {
 469         struct drm_device *dev = encoder->dev;
 470         struct drm_psb_private *dev_priv = dev->dev_private;
 471         u32 pfit_control;
 472
 473         /*
 474          * The LVDS pin pair will already have been turned on in the
 475          * psb_intel_crtc_mode_set since it has a large impact on the DPLL
 476          * settings.
 477          */
 478
 479         /*
 480          * Enable automatic panel scaling so that non-native modes fill the
 481          * screen.  Should be enabled before the pipe is enabled, according to
 482          * register description and PRM.
 483          */
 484         if (mode->hdisplay != adjusted_mode->hdisplay ||
 485             mode->vdisplay != adjusted_mode->vdisplay)
 486                 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
 487                                 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
 488                                 HORIZ_INTERP_BILINEAR);
 489         else
 490                 pfit_control = 0;
 491
 492         if (dev_priv->lvds_dither)
 493                 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
 494
 495         REG_WRITE(PFIT_CONTROL, pfit_control);
 496 }
 497
 498 /*
 499  * Detect the LVDS connection.
 500  *
 501  * This always returns CONNECTOR_STATUS_CONNECTED.
 502  * This connector should only have
 503  * been set up if the LVDS was actually connected anyway.
 504  */
 505 static enum drm_connector_status psb_intel_lvds_detect(struct drm_connector
 506                                                    *connector, bool force)
 507 {
 508         return connector_status_connected;
 509 }
 510
 511 /*
 512  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 513  */
 514 static int psb_intel_lvds_get_modes(struct drm_connector *connector)
 515 {
 516         struct drm_device *dev = connector->dev;
 517         struct psb_intel_output *psb_intel_output =
 518                                         to_psb_intel_output(connector);
 519         struct psb_intel_mode_device *mode_dev =
 520                                         psb_intel_output->mode_dev;
 521         int ret = 0;
 522
 523         if (!IS_MRST(dev))
 524                 ret = psb_intel_ddc_get_modes(psb_intel_output);
 525
 526         if (ret)
 527                 return ret;
 528
 529         /* Didn't get an EDID, so
 530          * Set wide sync ranges so we get all modes
 531          * handed to valid_mode for checking
 532          */
 533         connector->display_info.min_vfreq = 0;
 534         connector->display_info.max_vfreq = 200;
 535         connector->display_info.min_hfreq = 0;
 536         connector->display_info.max_hfreq = 200;
 537
 538         if (mode_dev->panel_fixed_mode != NULL) {
 539                 struct drm_display_mode *mode =
 540                     drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
 541                 drm_mode_probed_add(connector, mode);
 542                 return 1;
 543         }
 544
 545         return 0;
 546 }
 547
 548 /**
 549  * psb_intel_lvds_destroy - unregister and free LVDS structures
 550  * @connector: connector to free
 551  *
 552  * Unregister the DDC bus for this connector then free the driver private
 553  * structure.
 554  */
 555 void psb_intel_lvds_destroy(struct drm_connector *connector)
 556 {
 557         struct psb_intel_output *psb_intel_output =
 558                                         to_psb_intel_output(connector);
 559
 560         if (psb_intel_output->ddc_bus)
 561                 psb_intel_i2c_destroy(psb_intel_output->ddc_bus);
 562         drm_sysfs_connector_remove(connector);
 563         drm_connector_cleanup(connector);
 564         kfree(connector);
 565 }
 566
 567 int psb_intel_lvds_set_property(struct drm_connector *connector,
 568                                        struct drm_property *property,
 569                                        uint64_t value)
 570 {
 571         struct drm_encoder *encoder = connector->encoder;
 572
 573         if (!encoder)
 574                 return -1;
 575
 576         if (!strcmp(property->name, "scaling mode")) {
 577                 struct psb_intel_crtc *crtc =
 578                                         to_psb_intel_crtc(encoder->crtc);
 579                 uint64_t curval;
 580
 581                 if (!crtc)
 582                         goto set_prop_error;
 583
 584                 switch (value) {
 585                 case DRM_MODE_SCALE_FULLSCREEN:
 586                         break;
 587                 case DRM_MODE_SCALE_NO_SCALE:
 588                         break;
 589                 case DRM_MODE_SCALE_ASPECT:
 590                         break;
 591                 default:
 592                         goto set_prop_error;
 593                 }
 594
 595                 if (drm_connector_property_get_value(connector,
 596                                                      property,
 597                                                      &curval))
 598                         goto set_prop_error;
 599
 600                 if (curval == value)
 601                         goto set_prop_done;
 602
 603                 if (drm_connector_property_set_value(connector,
 604                                                         property,
 605                                                         value))
 606                         goto set_prop_error;
 607
 608                 if (crtc->saved_mode.hdisplay != 0 &&
 609                     crtc->saved_mode.vdisplay != 0) {
 610                         if (!drm_crtc_helper_set_mode(encoder->crtc,
 611                                                       &crtc->saved_mode,
 612                                                       encoder->crtc->x,
 613                                                       encoder->crtc->y,
 614                                                       encoder->crtc->fb))
 615                                 goto set_prop_error;
 616                 }
 617         } else if (!strcmp(property->name, "backlight")) {
 618                 if (drm_connector_property_set_value(connector,
 619                                                         property,
 620                                                         value))
 621                         goto set_prop_error;
 622                 else {
 623 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
 624                         struct drm_psb_private *devp = encoder->dev->dev_private;
 625                         struct backlight_device *bd = devp->backlight_device;
 626                         if (bd) {
 627                                 bd->props.brightness = value;
 628                                 backlight_update_status(bd);
 629                         }
 630 #endif
 631                 }
 632         } else if (!strcmp(property->name, "DPMS")) {
 633                 struct drm_encoder_helper_funcs *hfuncs
 634                                                 = encoder->helper_private;
 635                 hfuncs->dpms(encoder, value);
 636         }
 637
 638 set_prop_done:
 639         return 0;
 640 set_prop_error:
 641         return -1;
 642 }
 643
 644 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
 645         .dpms = psb_intel_lvds_encoder_dpms,
 646         .mode_fixup = psb_intel_lvds_mode_fixup,
 647         .prepare = psb_intel_lvds_prepare,
 648         .mode_set = psb_intel_lvds_mode_set,
 649         .commit = psb_intel_lvds_commit,
 650 };
 651
 652 const struct drm_connector_helper_funcs
 653                                 psb_intel_lvds_connector_helper_funcs = {
 654         .get_modes = psb_intel_lvds_get_modes,
 655         .mode_valid = psb_intel_lvds_mode_valid,
 656         .best_encoder = psb_intel_best_encoder,
 657 };
 658
 659 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
 660         .dpms = drm_helper_connector_dpms,
 661         .save = psb_intel_lvds_save,
 662         .restore = psb_intel_lvds_restore,
 663         .detect = psb_intel_lvds_detect,
 664         .fill_modes = drm_helper_probe_single_connector_modes,
 665         .set_property = psb_intel_lvds_set_property,
 666         .destroy = psb_intel_lvds_destroy,
 667 };
 668
 669
 670 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
 671 {
 672         drm_encoder_cleanup(encoder);
 673 }
 674
 675 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
 676         .destroy = psb_intel_lvds_enc_destroy,
 677 };
 678
 679
 680
 681 /**
 682  * psb_intel_lvds_init - setup LVDS connectors on this device
 683  * @dev: drm device
 684  *
 685  * Create the connector, register the LVDS DDC bus, and try to figure out what
 686  * modes we can display on the LVDS panel (if present).
 687  */
 688 void psb_intel_lvds_init(struct drm_device *dev,
 689                      struct psb_intel_mode_device *mode_dev)
 690 {
 691         struct psb_intel_output *psb_intel_output;
 692         struct psb_intel_lvds_priv *lvds_priv;
 693         struct drm_connector *connector;
 694         struct drm_encoder *encoder;
 695         struct drm_display_mode *scan;  /* *modes, *bios_mode; */
 696         struct drm_crtc *crtc;
 697         struct drm_psb_private *dev_priv =
 698                                 (struct drm_psb_private *)dev->dev_private;
 699         u32 lvds;
 700         int pipe;
 701
 702         psb_intel_output = kzalloc(sizeof(struct psb_intel_output), GFP_KERNEL);
 703         if (!psb_intel_output)
 704                 return;
 705
 706         lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
 707         if (!lvds_priv) {
 708                 kfree(psb_intel_output);
 709                 dev_err(dev->dev, "LVDS private allocation error\n");
 710                 return;
 711         }
 712
 713         psb_intel_output->dev_priv = lvds_priv;
 714
 715         psb_intel_output->mode_dev = mode_dev;
 716         connector = &psb_intel_output->base;
 717         encoder = &psb_intel_output->enc;
 718         drm_connector_init(dev, &psb_intel_output->base,
 719                            &psb_intel_lvds_connector_funcs,
 720                            DRM_MODE_CONNECTOR_LVDS);
 721
 722         drm_encoder_init(dev, &psb_intel_output->enc,
 723                          &psb_intel_lvds_enc_funcs,
 724                          DRM_MODE_ENCODER_LVDS);
 725
 726         drm_mode_connector_attach_encoder(&psb_intel_output->base,
 727                                           &psb_intel_output->enc);
 728         psb_intel_output->type = INTEL_OUTPUT_LVDS;
 729
 730         drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
 731         drm_connector_helper_add(connector,
 732                                  &psb_intel_lvds_connector_helper_funcs);
 733         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 734         connector->interlace_allowed = false;
 735         connector->doublescan_allowed = false;
 736
 737         /*Attach connector properties*/
 738         drm_connector_attach_property(connector,
 739                                       dev->mode_config.scaling_mode_property,
 740                                       DRM_MODE_SCALE_FULLSCREEN);
 741         drm_connector_attach_property(connector,
 742                                       dev_priv->backlight_property,
 743                                       BRIGHTNESS_MAX_LEVEL);
 744
 745         /*
 746          * Set up I2C bus
 747          * FIXME: distroy i2c_bus when exit
 748          */
 749         psb_intel_output->i2c_bus = psb_intel_i2c_create(dev,
 750                                                          GPIOB,
 751                                                          "LVDSBLC_B");
 752         if (!psb_intel_output->i2c_bus) {
 753                 dev_printk(KERN_ERR,
 754                         &dev->pdev->dev, "I2C bus registration failed.\n");
 755                 goto failed_blc_i2c;
 756         }
 757         psb_intel_output->i2c_bus->slave_addr = 0x2C;
 758         dev_priv->lvds_i2c_bus =  psb_intel_output->i2c_bus;
 759
 760         /*
 761          * LVDS discovery:
 762          * 1) check for EDID on DDC
 763          * 2) check for VBT data
 764          * 3) check to see if LVDS is already on
 765          *    if none of the above, no panel
 766          * 4) make sure lid is open
 767          *    if closed, act like it's not there for now
 768          */
 769
 770         /* Set up the DDC bus. */
 771         psb_intel_output->ddc_bus = psb_intel_i2c_create(dev,
 772                                                          GPIOC,
 773                                                          "LVDSDDC_C");
 774         if (!psb_intel_output->ddc_bus) {
 775                 dev_printk(KERN_ERR, &dev->pdev->dev,
 776                            "DDC bus registration " "failed.\n");
 777                 goto failed_ddc;
 778         }
 779
 780         /*
 781          * Attempt to get the fixed panel mode from DDC.  Assume that the
 782          * preferred mode is the right one.
 783          */
 784         psb_intel_ddc_get_modes(psb_intel_output);
 785         list_for_each_entry(scan, &connector->probed_modes, head) {
 786                 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
 787                         mode_dev->panel_fixed_mode =
 788                             drm_mode_duplicate(dev, scan);
 789                         goto out;       /* FIXME: check for quirks */
 790                 }
 791         }
 792
 793         /* Failed to get EDID, what about VBT? do we need this? */
 794         if (mode_dev->vbt_mode)
 795                 mode_dev->panel_fixed_mode =
 796                     drm_mode_duplicate(dev, mode_dev->vbt_mode);
 797
 798         if (!mode_dev->panel_fixed_mode)
 799                 if (dev_priv->lfp_lvds_vbt_mode)
 800                         mode_dev->panel_fixed_mode =
 801                                 drm_mode_duplicate(dev,
 802                                         dev_priv->lfp_lvds_vbt_mode);
 803
 804         /*
 805          * If we didn't get EDID, try checking if the panel is already turned
 806          * on.  If so, assume that whatever is currently programmed is the
 807          * correct mode.
 808          */
 809         lvds = REG_READ(LVDS);
 810         pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
 811         crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
 812
 813         if (crtc && (lvds & LVDS_PORT_EN)) {
 814                 mode_dev->panel_fixed_mode =
 815                     psb_intel_crtc_mode_get(dev, crtc);
 816                 if (mode_dev->panel_fixed_mode) {
 817                         mode_dev->panel_fixed_mode->type |=
 818                             DRM_MODE_TYPE_PREFERRED;
 819                         goto out;       /* FIXME: check for quirks */
 820                 }
 821         }
 822
 823         /* If we still don't have a mode after all that, give up. */
 824         if (!mode_dev->panel_fixed_mode) {
 825                 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
 826                 goto failed_find;
 827         }
 828
 829         /*
 830          * Blacklist machines with BIOSes that list an LVDS panel without
 831          * actually having one.
 832          */
 833 out:
 834         drm_sysfs_connector_add(connector);
 835         return;
 836
 837 failed_find:
 838         if (psb_intel_output->ddc_bus)
 839                 psb_intel_i2c_destroy(psb_intel_output->ddc_bus);
 840 failed_ddc:
 841         if (psb_intel_output->i2c_bus)
 842                 psb_intel_i2c_destroy(psb_intel_output->i2c_bus);
 843 failed_blc_i2c:
 844         drm_encoder_cleanup(encoder);
 845         drm_connector_cleanup(connector);
 846         kfree(connector);
 847 }
 848