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