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         struct psb_intel_i2c_chan *i2c_bus;
  64         struct psb_intel_i2c_chan *ddc_bus;
  65 };
  66
  67
  68 /*
  69  * Returns the maximum level of the backlight duty cycle field.
  70  */
  71 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
  72 {
  73         struct drm_psb_private *dev_priv = dev->dev_private;
  74         u32 ret;
  75
  76         if (gma_power_begin(dev, false)) {
  77                 ret = REG_READ(BLC_PWM_CTL);
  78                 gma_power_end(dev);
  79         } else /* Powered off, use the saved value */
  80                 ret = dev_priv->regs.saveBLC_PWM_CTL;
  81
  82         /* Top 15bits hold the frequency mask */
  83         ret = (ret &  BACKLIGHT_MODULATION_FREQ_MASK) >>
  84                                         BACKLIGHT_MODULATION_FREQ_SHIFT;
  85
  86         ret *= 2;       /* Return a 16bit range as needed for setting */
  87         if (ret == 0)
  88                 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
  89                         REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL);
  90         return ret;
  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 == 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         dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
 164                   (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
 165                   (blc_pwm_duty_cycle));
 166
 167         return 0;
 168 }
 169
 170 /*
 171  * Set LVDS backlight level either by I2C or PWM
 172  */
 173 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
 174 {
 175         struct drm_psb_private *dev_priv = dev->dev_private;
 176
 177         dev_dbg(dev->dev, "backlight level is %d\n", level);
 178
 179         if (!dev_priv->lvds_bl) {
 180                 dev_err(dev->dev, "NO LVDS backlight info\n");
 181                 return;
 182         }
 183
 184         if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
 185                 psb_lvds_i2c_set_brightness(dev, level);
 186         else
 187                 psb_lvds_pwm_set_brightness(dev, level);
 188 }
 189
 190 /*
 191  * Sets the backlight level.
 192  *
 193  * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight().
 194  */
 195 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
 196 {
 197         struct drm_psb_private *dev_priv = dev->dev_private;
 198         u32 blc_pwm_ctl;
 199
 200         if (gma_power_begin(dev, false)) {
 201                 blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
 202                 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
 203                 REG_WRITE(BLC_PWM_CTL,
 204                                 (blc_pwm_ctl |
 205                                 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
 206                 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
 207                                         (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
 208                 gma_power_end(dev);
 209         } else {
 210                 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
 211                                 ~BACKLIGHT_DUTY_CYCLE_MASK;
 212                 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
 213                                         (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
 214         }
 215 }
 216
 217 /*
 218  * Sets the power state for the panel.
 219  */
 220 static void psb_intel_lvds_set_power(struct drm_device *dev, bool on)
 221 {
 222         struct drm_psb_private *dev_priv = dev->dev_private;
 223         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 224         u32 pp_status;
 225
 226         if (!gma_power_begin(dev, true)) {
 227                 dev_err(dev->dev, "set power, chip off!\n");
 228                 return;
 229         }
 230
 231         if (on) {
 232                 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
 233                           POWER_TARGET_ON);
 234                 do {
 235                         pp_status = REG_READ(PP_STATUS);
 236                 } while ((pp_status & PP_ON) == 0);
 237
 238                 psb_intel_lvds_set_backlight(dev,
 239                                              mode_dev->backlight_duty_cycle);
 240         } else {
 241                 psb_intel_lvds_set_backlight(dev, 0);
 242
 243                 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
 244                           ~POWER_TARGET_ON);
 245                 do {
 246                         pp_status = REG_READ(PP_STATUS);
 247                 } while (pp_status & PP_ON);
 248         }
 249
 250         gma_power_end(dev);
 251 }
 252
 253 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
 254 {
 255         struct drm_device *dev = encoder->dev;
 256
 257         if (mode == DRM_MODE_DPMS_ON)
 258                 psb_intel_lvds_set_power(dev, true);
 259         else
 260                 psb_intel_lvds_set_power(dev, false);
 261
 262         /* XXX: We never power down the LVDS pairs. */
 263 }
 264
 265 static void psb_intel_lvds_save(struct drm_connector *connector)
 266 {
 267         struct drm_device *dev = connector->dev;
 268         struct drm_psb_private *dev_priv =
 269                 (struct drm_psb_private *)dev->dev_private;
 270         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 271         struct psb_intel_lvds_priv *lvds_priv =
 272                 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
 273
 274         lvds_priv->savePP_ON = REG_READ(LVDSPP_ON);
 275         lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF);
 276         lvds_priv->saveLVDS = REG_READ(LVDS);
 277         lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL);
 278         lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE);
 279         /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/
 280         lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
 281         lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
 282         lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
 283
 284         /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/
 285         dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL &
 286                                                 BACKLIGHT_DUTY_CYCLE_MASK);
 287
 288         /*
 289          * If the light is off at server startup,
 290          * just make it full brightness
 291          */
 292         if (dev_priv->backlight_duty_cycle == 0)
 293                 dev_priv->backlight_duty_cycle =
 294                 psb_intel_lvds_get_max_backlight(dev);
 295
 296         dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
 297                         lvds_priv->savePP_ON,
 298                         lvds_priv->savePP_OFF,
 299                         lvds_priv->saveLVDS,
 300                         lvds_priv->savePP_CONTROL,
 301                         lvds_priv->savePP_CYCLE,
 302                         lvds_priv->saveBLC_PWM_CTL);
 303 }
 304
 305 static void psb_intel_lvds_restore(struct drm_connector *connector)
 306 {
 307         struct drm_device *dev = connector->dev;
 308         u32 pp_status;
 309         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 310         struct psb_intel_lvds_priv *lvds_priv =
 311                 (struct psb_intel_lvds_priv *)gma_encoder->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 drm_psb_private *dev_priv = connector->dev->dev_private;
 350         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 351         struct drm_display_mode *fixed_mode =
 352                                         dev_priv->mode_dev.panel_fixed_mode;
 353
 354         if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
 355                 fixed_mode = dev_priv->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                                   const struct drm_display_mode *mode,
 376                                   struct drm_display_mode *adjusted_mode)
 377 {
 378         struct drm_device *dev = encoder->dev;
 379         struct drm_psb_private *dev_priv = dev->dev_private;
 380         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 381         struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
 382         struct drm_encoder *tmp_encoder;
 383         struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
 384         struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
 385
 386         if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
 387                 panel_fixed_mode = mode_dev->panel_fixed_mode2;
 388
 389         /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
 390         if (!IS_MRST(dev) && gma_crtc->pipe == 0) {
 391                 pr_err("Can't support LVDS on pipe A\n");
 392                 return false;
 393         }
 394         if (IS_MRST(dev) && gma_crtc->pipe != 0) {
 395                 pr_err("Must use PIPE A\n");
 396                 return false;
 397         }
 398         /* Should never happen!! */
 399         list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
 400                             head) {
 401                 if (tmp_encoder != encoder
 402                     && tmp_encoder->crtc == encoder->crtc) {
 403                         pr_err("Can't enable LVDS and another encoder on the same pipe\n");
 404                         return false;
 405                 }
 406         }
 407
 408         /*
 409          * If we have timings from the BIOS for the panel, put them in
 410          * to the adjusted mode.  The CRTC will be set up for this mode,
 411          * with the panel scaling set up to source from the H/VDisplay
 412          * of the original mode.
 413          */
 414         if (panel_fixed_mode != NULL) {
 415                 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
 416                 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
 417                 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
 418                 adjusted_mode->htotal = panel_fixed_mode->htotal;
 419                 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
 420                 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
 421                 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
 422                 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
 423                 adjusted_mode->clock = panel_fixed_mode->clock;
 424                 drm_mode_set_crtcinfo(adjusted_mode,
 425                                       CRTC_INTERLACE_HALVE_V);
 426         }
 427
 428         /*
 429          * XXX: It would be nice to support lower refresh rates on the
 430          * panels to reduce power consumption, and perhaps match the
 431          * user's requested refresh rate.
 432          */
 433
 434         return true;
 435 }
 436
 437 static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
 438 {
 439         struct drm_device *dev = encoder->dev;
 440         struct drm_psb_private *dev_priv = dev->dev_private;
 441         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 442
 443         if (!gma_power_begin(dev, true))
 444                 return;
 445
 446         mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
 447         mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
 448                                           BACKLIGHT_DUTY_CYCLE_MASK);
 449
 450         psb_intel_lvds_set_power(dev, false);
 451
 452         gma_power_end(dev);
 453 }
 454
 455 static void psb_intel_lvds_commit(struct drm_encoder *encoder)
 456 {
 457         struct drm_device *dev = encoder->dev;
 458         struct drm_psb_private *dev_priv = dev->dev_private;
 459         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 460
 461         if (mode_dev->backlight_duty_cycle == 0)
 462                 mode_dev->backlight_duty_cycle =
 463                     psb_intel_lvds_get_max_backlight(dev);
 464
 465         psb_intel_lvds_set_power(dev, true);
 466 }
 467
 468 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
 469                                 struct drm_display_mode *mode,
 470                                 struct drm_display_mode *adjusted_mode)
 471 {
 472         struct drm_device *dev = encoder->dev;
 473         struct drm_psb_private *dev_priv = dev->dev_private;
 474         u32 pfit_control;
 475
 476         /*
 477          * The LVDS pin pair will already have been turned on in the
 478          * psb_intel_crtc_mode_set since it has a large impact on the DPLL
 479          * settings.
 480          */
 481
 482         /*
 483          * Enable automatic panel scaling so that non-native modes fill the
 484          * screen.  Should be enabled before the pipe is enabled, according to
 485          * register description and PRM.
 486          */
 487         if (mode->hdisplay != adjusted_mode->hdisplay ||
 488             mode->vdisplay != adjusted_mode->vdisplay)
 489                 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
 490                                 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
 491                                 HORIZ_INTERP_BILINEAR);
 492         else
 493                 pfit_control = 0;
 494
 495         if (dev_priv->lvds_dither)
 496                 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
 497
 498         REG_WRITE(PFIT_CONTROL, pfit_control);
 499 }
 500
 501 /*
 502  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 503  */
 504 static int psb_intel_lvds_get_modes(struct drm_connector *connector)
 505 {
 506         struct drm_device *dev = connector->dev;
 507         struct drm_psb_private *dev_priv = dev->dev_private;
 508         struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 509         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 510         struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
 511         int ret = 0;
 512
 513         if (!IS_MRST(dev))
 514                 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter);
 515
 516         if (ret)
 517                 return ret;
 518
 519         if (mode_dev->panel_fixed_mode != NULL) {
 520                 struct drm_display_mode *mode =
 521                     drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
 522                 drm_mode_probed_add(connector, mode);
 523                 return 1;
 524         }
 525
 526         return 0;
 527 }
 528
 529 /**
 530  * psb_intel_lvds_destroy - unregister and free LVDS structures
 531  * @connector: connector to free
 532  *
 533  * Unregister the DDC bus for this connector then free the driver private
 534  * structure.
 535  */
 536 void psb_intel_lvds_destroy(struct drm_connector *connector)
 537 {
 538         struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 539         struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
 540
 541         psb_intel_i2c_destroy(lvds_priv->ddc_bus);
 542         drm_connector_unregister(connector);
 543         drm_connector_cleanup(connector);
 544         kfree(connector);
 545 }
 546
 547 int psb_intel_lvds_set_property(struct drm_connector *connector,
 548                                        struct drm_property *property,
 549                                        uint64_t value)
 550 {
 551         struct drm_encoder *encoder = connector->encoder;
 552
 553         if (!encoder)
 554                 return -1;
 555
 556         if (!strcmp(property->name, "scaling mode")) {
 557                 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
 558                 uint64_t curval;
 559
 560                 if (!crtc)
 561                         goto set_prop_error;
 562
 563                 switch (value) {
 564                 case DRM_MODE_SCALE_FULLSCREEN:
 565                         break;
 566                 case DRM_MODE_SCALE_NO_SCALE:
 567                         break;
 568                 case DRM_MODE_SCALE_ASPECT:
 569                         break;
 570                 default:
 571                         goto set_prop_error;
 572                 }
 573
 574                 if (drm_object_property_get_value(&connector->base,
 575                                                      property,
 576                                                      &curval))
 577                         goto set_prop_error;
 578
 579                 if (curval == value)
 580                         goto set_prop_done;
 581
 582                 if (drm_object_property_set_value(&connector->base,
 583                                                         property,
 584                                                         value))
 585                         goto set_prop_error;
 586
 587                 if (crtc->saved_mode.hdisplay != 0 &&
 588                     crtc->saved_mode.vdisplay != 0) {
 589                         if (!drm_crtc_helper_set_mode(encoder->crtc,
 590                                                       &crtc->saved_mode,
 591                                                       encoder->crtc->x,
 592                                                       encoder->crtc->y,
 593                                                       encoder->crtc->primary->fb))
 594                                 goto set_prop_error;
 595                 }
 596         } else if (!strcmp(property->name, "backlight")) {
 597                 if (drm_object_property_set_value(&connector->base,
 598                                                         property,
 599                                                         value))
 600                         goto set_prop_error;
 601                 else
 602                         gma_backlight_set(encoder->dev, value);
 603         } else if (!strcmp(property->name, "DPMS")) {
 604                 const struct drm_encoder_helper_funcs *hfuncs
 605                                                 = encoder->helper_private;
 606                 hfuncs->dpms(encoder, value);
 607         }
 608
 609 set_prop_done:
 610         return 0;
 611 set_prop_error:
 612         return -1;
 613 }
 614
 615 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
 616         .dpms = psb_intel_lvds_encoder_dpms,
 617         .mode_fixup = psb_intel_lvds_mode_fixup,
 618         .prepare = psb_intel_lvds_prepare,
 619         .mode_set = psb_intel_lvds_mode_set,
 620         .commit = psb_intel_lvds_commit,
 621 };
 622
 623 const struct drm_connector_helper_funcs
 624                                 psb_intel_lvds_connector_helper_funcs = {
 625         .get_modes = psb_intel_lvds_get_modes,
 626         .mode_valid = psb_intel_lvds_mode_valid,
 627         .best_encoder = gma_best_encoder,
 628 };
 629
 630 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
 631         .dpms = drm_helper_connector_dpms,
 632         .fill_modes = drm_helper_probe_single_connector_modes,
 633         .set_property = psb_intel_lvds_set_property,
 634         .destroy = psb_intel_lvds_destroy,
 635 };
 636
 637
 638 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
 639 {
 640         drm_encoder_cleanup(encoder);
 641 }
 642
 643 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
 644         .destroy = psb_intel_lvds_enc_destroy,
 645 };
 646
 647
 648
 649 /**
 650  * psb_intel_lvds_init - setup LVDS connectors on this device
 651  * @dev: drm device
 652  *
 653  * Create the connector, register the LVDS DDC bus, and try to figure out what
 654  * modes we can display on the LVDS panel (if present).
 655  */
 656 void psb_intel_lvds_init(struct drm_device *dev,
 657                          struct psb_intel_mode_device *mode_dev)
 658 {
 659         struct gma_encoder *gma_encoder;
 660         struct gma_connector *gma_connector;
 661         struct psb_intel_lvds_priv *lvds_priv;
 662         struct drm_connector *connector;
 663         struct drm_encoder *encoder;
 664         struct drm_display_mode *scan;  /* *modes, *bios_mode; */
 665         struct drm_crtc *crtc;
 666         struct drm_psb_private *dev_priv = dev->dev_private;
 667         u32 lvds;
 668         int pipe;
 669
 670         gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 671         if (!gma_encoder) {
 672                 dev_err(dev->dev, "gma_encoder allocation error\n");
 673                 return;
 674         }
 675
 676         gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
 677         if (!gma_connector) {
 678                 dev_err(dev->dev, "gma_connector allocation error\n");
 679                 goto failed_encoder;
 680         }
 681
 682         lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
 683         if (!lvds_priv) {
 684                 dev_err(dev->dev, "LVDS private allocation error\n");
 685                 goto failed_connector;
 686         }
 687
 688         gma_encoder->dev_priv = lvds_priv;
 689
 690         connector = &gma_connector->base;
 691         gma_connector->save = psb_intel_lvds_save;
 692         gma_connector->restore = psb_intel_lvds_restore;
 693
 694         encoder = &gma_encoder->base;
 695         drm_connector_init(dev, connector,
 696                            &psb_intel_lvds_connector_funcs,
 697                            DRM_MODE_CONNECTOR_LVDS);
 698
 699         drm_encoder_init(dev, encoder,
 700                          &psb_intel_lvds_enc_funcs,
 701                          DRM_MODE_ENCODER_LVDS, NULL);
 702
 703         gma_connector_attach_encoder(gma_connector, gma_encoder);
 704         gma_encoder->type = INTEL_OUTPUT_LVDS;
 705
 706         drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
 707         drm_connector_helper_add(connector,
 708                                  &psb_intel_lvds_connector_helper_funcs);
 709         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 710         connector->interlace_allowed = false;
 711         connector->doublescan_allowed = false;
 712
 713         /*Attach connector properties*/
 714         drm_object_attach_property(&connector->base,
 715                                       dev->mode_config.scaling_mode_property,
 716                                       DRM_MODE_SCALE_FULLSCREEN);
 717         drm_object_attach_property(&connector->base,
 718                                       dev_priv->backlight_property,
 719                                       BRIGHTNESS_MAX_LEVEL);
 720
 721         /*
 722          * Set up I2C bus
 723          * FIXME: distroy i2c_bus when exit
 724          */
 725         lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B");
 726         if (!lvds_priv->i2c_bus) {
 727                 dev_printk(KERN_ERR,
 728                         &dev->pdev->dev, "I2C bus registration failed.\n");
 729                 goto failed_blc_i2c;
 730         }
 731         lvds_priv->i2c_bus->slave_addr = 0x2C;
 732         dev_priv->lvds_i2c_bus =  lvds_priv->i2c_bus;
 733
 734         /*
 735          * LVDS discovery:
 736          * 1) check for EDID on DDC
 737          * 2) check for VBT data
 738          * 3) check to see if LVDS is already on
 739          *    if none of the above, no panel
 740          * 4) make sure lid is open
 741          *    if closed, act like it's not there for now
 742          */
 743
 744         /* Set up the DDC bus. */
 745         lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
 746         if (!lvds_priv->ddc_bus) {
 747                 dev_printk(KERN_ERR, &dev->pdev->dev,
 748                            "DDC bus registration " "failed.\n");
 749                 goto failed_ddc;
 750         }
 751
 752         /*
 753          * Attempt to get the fixed panel mode from DDC.  Assume that the
 754          * preferred mode is the right one.
 755          */
 756         mutex_lock(&dev->mode_config.mutex);
 757         psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter);
 758         list_for_each_entry(scan, &connector->probed_modes, head) {
 759                 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
 760                         mode_dev->panel_fixed_mode =
 761                             drm_mode_duplicate(dev, scan);
 762                         DRM_DEBUG_KMS("Using mode from DDC\n");
 763                         goto out;       /* FIXME: check for quirks */
 764                 }
 765         }
 766
 767         /* Failed to get EDID, what about VBT? do we need this? */
 768         if (dev_priv->lfp_lvds_vbt_mode) {
 769                 mode_dev->panel_fixed_mode =
 770                         drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
 771
 772                 if (mode_dev->panel_fixed_mode) {
 773                         mode_dev->panel_fixed_mode->type |=
 774                                 DRM_MODE_TYPE_PREFERRED;
 775                         DRM_DEBUG_KMS("Using mode from VBT\n");
 776                         goto out;
 777                 }
 778         }
 779
 780         /*
 781          * If we didn't get EDID, try checking if the panel is already turned
 782          * on.  If so, assume that whatever is currently programmed is the
 783          * correct mode.
 784          */
 785         lvds = REG_READ(LVDS);
 786         pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
 787         crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
 788
 789         if (crtc && (lvds & LVDS_PORT_EN)) {
 790                 mode_dev->panel_fixed_mode =
 791                     psb_intel_crtc_mode_get(dev, crtc);
 792                 if (mode_dev->panel_fixed_mode) {
 793                         mode_dev->panel_fixed_mode->type |=
 794                             DRM_MODE_TYPE_PREFERRED;
 795                         DRM_DEBUG_KMS("Using pre-programmed mode\n");
 796                         goto out;       /* FIXME: check for quirks */
 797                 }
 798         }
 799
 800         /* If we still don't have a mode after all that, give up. */
 801         if (!mode_dev->panel_fixed_mode) {
 802                 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
 803                 goto failed_find;
 804         }
 805
 806         /*
 807          * Blacklist machines with BIOSes that list an LVDS panel without
 808          * actually having one.
 809          */
 810 out:
 811         mutex_unlock(&dev->mode_config.mutex);
 812         drm_connector_register(connector);
 813         return;
 814
 815 failed_find:
 816         mutex_unlock(&dev->mode_config.mutex);
 817         psb_intel_i2c_destroy(lvds_priv->ddc_bus);
 818 failed_ddc:
 819         psb_intel_i2c_destroy(lvds_priv->i2c_bus);
 820 failed_blc_i2c:
 821         drm_encoder_cleanup(encoder);
 822         drm_connector_cleanup(connector);
 823 failed_connector:
 824         kfree(gma_connector);
 825 failed_encoder:
 826         kfree(gma_encoder);
 827 }
 828