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