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 /* MRST defines start */
  36 uint8_t blc_freq;
  37 uint8_t blc_minbrightness;
  38 uint8_t blc_i2caddr;
  39 uint8_t blc_brightnesscmd;
  40 int lvds_backlight;             /* restore backlight to this value */
  41
  42 u32 CoreClock;
  43 u32 PWMControlRegFreq;
  44
  45 /**
  46  * LVDS I2C backlight control macros
  47  */
  48 #define BRIGHTNESS_MAX_LEVEL 100
  49 #define BRIGHTNESS_MASK 0xFF
  50 #define BLC_I2C_TYPE    0x01
  51 #define BLC_PWM_TYPT    0x02
  52
  53 #define BLC_POLARITY_NORMAL 0
  54 #define BLC_POLARITY_INVERSE 1
  55
  56 #define PSB_BLC_MAX_PWM_REG_FREQ       (0xFFFE)
  57 #define PSB_BLC_MIN_PWM_REG_FREQ        (0x2)
  58 #define PSB_BLC_PWM_PRECISION_FACTOR    (10)
  59 #define PSB_BACKLIGHT_PWM_CTL_SHIFT     (16)
  60 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
  61
  62 struct psb_intel_lvds_priv {
  63         /**
  64          * Saved LVDO output states
  65          */
  66         uint32_t savePP_ON;
  67         uint32_t savePP_OFF;
  68         uint32_t saveLVDS;
  69         uint32_t savePP_CONTROL;
  70         uint32_t savePP_CYCLE;
  71         uint32_t savePFIT_CONTROL;
  72         uint32_t savePFIT_PGM_RATIOS;
  73         uint32_t saveBLC_PWM_CTL;
  74 };
  75
  76 /* MRST defines end */
  77
  78 /**
  79  * Returns the maximum level of the backlight duty cycle field.
  80  */
  81 static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
  82 {
  83         struct drm_psb_private *dev_priv = dev->dev_private;
  84         u32 retVal;
  85
  86         if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
  87                                         OSPM_UHB_ONLY_IF_ON)) {
  88                 retVal = ((REG_READ(BLC_PWM_CTL) &
  89                           BACKLIGHT_MODULATION_FREQ_MASK) >>
  90                           BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
  91
  92                 ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
  93         } else
  94                 retVal = ((dev_priv->saveBLC_PWM_CTL &
  95                           BACKLIGHT_MODULATION_FREQ_MASK) >>
  96                           BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
  97
  98         return retVal;
  99 }
 100
 101 /**
 102  * Set LVDS backlight level by I2C command
 103  */
 104 static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
 105                                         unsigned int level)
 106 {
 107         struct drm_psb_private *dev_priv =
 108                 (struct drm_psb_private *)dev->dev_private;
 109
 110         struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
 111         u8 out_buf[2];
 112         unsigned int blc_i2c_brightness;
 113
 114         struct i2c_msg msgs[] = {
 115                 {
 116                         .addr = lvds_i2c_bus->slave_addr,
 117                         .flags = 0,
 118                         .len = 2,
 119                         .buf = out_buf,
 120                 }
 121         };
 122
 123         blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
 124                              BRIGHTNESS_MASK /
 125                              BRIGHTNESS_MAX_LEVEL);
 126
 127         if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
 128                 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
 129
 130         out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
 131         out_buf[1] = (u8)blc_i2c_brightness;
 132
 133         if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) {
 134                 DRM_DEBUG("I2C set brightness.(command, value) (%d, %d)\n",
 135                         blc_brightnesscmd,
 136                         blc_i2c_brightness);
 137                 return 0;
 138         }
 139
 140         DRM_ERROR("I2C transfer error\n");
 141         return -1;
 142 }
 143
 144
 145 static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
 146 {
 147         struct drm_psb_private *dev_priv =
 148                         (struct drm_psb_private *)dev->dev_private;
 149
 150         u32 max_pwm_blc;
 151         u32 blc_pwm_duty_cycle;
 152
 153         max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
 154
 155         /*BLC_PWM_CTL Should be initiated while backlight device init*/
 156         BUG_ON((max_pwm_blc & PSB_BLC_MAX_PWM_REG_FREQ) == 0);
 157
 158         blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
 159
 160         if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
 161                 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
 162
 163         blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
 164         REG_WRITE(BLC_PWM_CTL,
 165                   (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
 166                   (blc_pwm_duty_cycle));
 167
 168         return 0;
 169 }
 170
 171 /**
 172  * Set LVDS backlight level either by I2C or PWM
 173  */
 174 void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
 175 {
 176         /*u32 blc_pwm_ctl;*/
 177         struct drm_psb_private *dev_priv =
 178                         (struct drm_psb_private *)dev->dev_private;
 179
 180         DRM_DEBUG("backlight level is %d\n", level);
 181
 182         if (!dev_priv->lvds_bl) {
 183                 DRM_ERROR("NO LVDS Backlight Info\n");
 184                 return;
 185         }
 186
 187         if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
 188                 psb_lvds_i2c_set_brightness(dev, level);
 189         else
 190                 psb_lvds_pwm_set_brightness(dev, level);
 191 }
 192
 193 /**
 194  * Sets the backlight level.
 195  *
 196  * \param level backlight level, from 0 to psb_intel_lvds_get_max_backlight().
 197  */
 198 static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
 199 {
 200         struct drm_psb_private *dev_priv = dev->dev_private;
 201         u32 blc_pwm_ctl;
 202
 203         if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
 204                                         OSPM_UHB_ONLY_IF_ON)) {
 205                 blc_pwm_ctl =
 206                         REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
 207                 REG_WRITE(BLC_PWM_CTL,
 208                                 (blc_pwm_ctl |
 209                                 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
 210                 ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
 211         } else {
 212                 blc_pwm_ctl = dev_priv->saveBLC_PWM_CTL &
 213                                 ~BACKLIGHT_DUTY_CYCLE_MASK;
 214                 dev_priv->saveBLC_PWM_CTL = (blc_pwm_ctl |
 215                                         (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
 216         }
 217 }
 218
 219 /**
 220  * Sets the power state for the panel.
 221  */
 222 static void psb_intel_lvds_set_power(struct drm_device *dev,
 223                                  struct psb_intel_output *output, bool on)
 224 {
 225         u32 pp_status;
 226
 227         if (!ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
 228                                         OSPM_UHB_FORCE_POWER_ON))
 229                 return;
 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                                          output->
 240                                          mode_dev->backlight_duty_cycle);
 241         } else {
 242                 psb_intel_lvds_set_backlight(dev, 0);
 243
 244                 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
 245                           ~POWER_TARGET_ON);
 246                 do {
 247                         pp_status = REG_READ(PP_STATUS);
 248                 } while (pp_status & PP_ON);
 249         }
 250
 251         ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
 252 }
 253
 254 static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
 255 {
 256         struct drm_device *dev = encoder->dev;
 257         struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
 258
 259         if (mode == DRM_MODE_DPMS_ON)
 260                 psb_intel_lvds_set_power(dev, output, true);
 261         else
 262                 psb_intel_lvds_set_power(dev, output, false);
 263
 264         /* XXX: We never power down the LVDS pairs. */
 265 }
 266
 267 static void psb_intel_lvds_save(struct drm_connector *connector)
 268 {
 269         struct drm_device *dev = connector->dev;
 270         struct drm_psb_private *dev_priv =
 271                 (struct drm_psb_private *)dev->dev_private;
 272         struct psb_intel_output *psb_intel_output =
 273                 to_psb_intel_output(connector);
 274         struct psb_intel_lvds_priv *lvds_priv =
 275                 (struct psb_intel_lvds_priv *)psb_intel_output->dev_priv;
 276
 277         lvds_priv->savePP_ON = REG_READ(LVDSPP_ON);
 278         lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF);
 279         lvds_priv->saveLVDS = REG_READ(LVDS);
 280         lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL);
 281         lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE);
 282         /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/
 283         lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
 284         lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
 285         lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
 286
 287         /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/
 288         dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
 289                                                 BACKLIGHT_DUTY_CYCLE_MASK);
 290
 291         /*
 292          * If the light is off at server startup,
 293          * just make it full brightness
 294          */
 295         if (dev_priv->backlight_duty_cycle == 0)
 296                 dev_priv->backlight_duty_cycle =
 297                 psb_intel_lvds_get_max_backlight(dev);
 298
 299         DRM_DEBUG("(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
 300                         lvds_priv->savePP_ON,
 301                         lvds_priv->savePP_OFF,
 302                         lvds_priv->saveLVDS,
 303                         lvds_priv->savePP_CONTROL,
 304                         lvds_priv->savePP_CYCLE,
 305                         lvds_priv->saveBLC_PWM_CTL);
 306 }
 307
 308 static void psb_intel_lvds_restore(struct drm_connector *connector)
 309 {
 310         struct drm_device *dev = connector->dev;
 311         u32 pp_status;
 312
 313         /*struct drm_psb_private *dev_priv =
 314                                 (struct drm_psb_private *)dev->dev_private;*/
 315         struct psb_intel_output *psb_intel_output =
 316                                         to_psb_intel_output(connector);
 317         struct psb_intel_lvds_priv *lvds_priv =
 318                 (struct psb_intel_lvds_priv *)psb_intel_output->dev_priv;
 319
 320         DRM_DEBUG("(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
 321                         lvds_priv->savePP_ON,
 322                         lvds_priv->savePP_OFF,
 323                         lvds_priv->saveLVDS,
 324                         lvds_priv->savePP_CONTROL,
 325                         lvds_priv->savePP_CYCLE,
 326                         lvds_priv->saveBLC_PWM_CTL);
 327
 328         REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL);
 329         REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL);
 330         REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS);
 331         REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON);
 332         REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF);
 333         /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/
 334         REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE);
 335         REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL);
 336         REG_WRITE(LVDS, lvds_priv->saveLVDS);
 337
 338         if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) {
 339                 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
 340                         POWER_TARGET_ON);
 341                 do {
 342                         pp_status = REG_READ(PP_STATUS);
 343                 } while ((pp_status & PP_ON) == 0);
 344         } else {
 345                 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
 346                         ~POWER_TARGET_ON);
 347                 do {
 348                         pp_status = REG_READ(PP_STATUS);
 349                 } while (pp_status & PP_ON);
 350         }
 351 }
 352
 353 int psb_intel_lvds_mode_valid(struct drm_connector *connector,
 354                                  struct drm_display_mode *mode)
 355 {
 356         struct psb_intel_output *psb_intel_output =
 357                                 to_psb_intel_output(connector);
 358         struct drm_display_mode *fixed_mode =
 359             psb_intel_output->mode_dev->panel_fixed_mode;
 360
 361         PSB_DEBUG_ENTRY("\n");
 362
 363         if (psb_intel_output->type == INTEL_OUTPUT_MIPI2)
 364                 fixed_mode = psb_intel_output->mode_dev->panel_fixed_mode2;
 365
 366         /* just in case */
 367         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 368                 return MODE_NO_DBLESCAN;
 369
 370         /* just in case */
 371         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 372                 return MODE_NO_INTERLACE;
 373
 374         if (fixed_mode) {
 375                 if (mode->hdisplay > fixed_mode->hdisplay)
 376                         return MODE_PANEL;
 377                 if (mode->vdisplay > fixed_mode->vdisplay)
 378                         return MODE_PANEL;
 379         }
 380         return MODE_OK;
 381 }
 382
 383 bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder,
 384                                   struct drm_display_mode *mode,
 385                                   struct drm_display_mode *adjusted_mode)
 386 {
 387         struct psb_intel_mode_device *mode_dev =
 388             enc_to_psb_intel_output(encoder)->mode_dev;
 389         struct drm_device *dev = encoder->dev;
 390         struct psb_intel_crtc *psb_intel_crtc =
 391                                 to_psb_intel_crtc(encoder->crtc);
 392         struct drm_encoder *tmp_encoder;
 393         struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
 394         struct psb_intel_output *psb_intel_output =
 395                                         enc_to_psb_intel_output(encoder);
 396
 397         PSB_DEBUG_ENTRY("type = 0x%x, pipe = %d.\n",
 398                         psb_intel_output->type, psb_intel_crtc->pipe);
 399
 400         if (psb_intel_output->type == INTEL_OUTPUT_MIPI2)
 401                 panel_fixed_mode = mode_dev->panel_fixed_mode2;
 402
 403         /* PSB doesn't appear to be GEN4 */
 404         if (psb_intel_crtc->pipe == 0) {
 405                 printk(KERN_ERR "Can't support LVDS on pipe A\n");
 406                 return false;
 407         }
 408         /* Should never happen!! */
 409         list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
 410                             head) {
 411                 if (tmp_encoder != encoder
 412                     && tmp_encoder->crtc == encoder->crtc) {
 413                         printk(KERN_ERR "Can't enable LVDS and another "
 414                                "encoder on the same pipe\n");
 415                         return false;
 416                 }
 417         }
 418
 419         /*
 420          * If we have timings from the BIOS for the panel, put them in
 421          * to the adjusted mode.  The CRTC will be set up for this mode,
 422          * with the panel scaling set up to source from the H/VDisplay
 423          * of the original mode.
 424          */
 425         if (panel_fixed_mode != NULL) {
 426                 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
 427                 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
 428                 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
 429                 adjusted_mode->htotal = panel_fixed_mode->htotal;
 430                 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
 431                 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
 432                 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
 433                 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
 434                 adjusted_mode->clock = panel_fixed_mode->clock;
 435                 drm_mode_set_crtcinfo(adjusted_mode,
 436                                       CRTC_INTERLACE_HALVE_V);
 437         }
 438
 439         /*
 440          * XXX: It would be nice to support lower refresh rates on the
 441          * panels to reduce power consumption, and perhaps match the
 442          * user's requested refresh rate.
 443          */
 444
 445         return true;
 446 }
 447
 448 static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
 449 {
 450         struct drm_device *dev = encoder->dev;
 451         struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
 452         struct psb_intel_mode_device *mode_dev = output->mode_dev;
 453
 454         PSB_DEBUG_ENTRY("\n");
 455
 456         if (!ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
 457                                         OSPM_UHB_FORCE_POWER_ON))
 458                 return;
 459
 460         mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
 461         mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
 462                                           BACKLIGHT_DUTY_CYCLE_MASK);
 463
 464         psb_intel_lvds_set_power(dev, output, false);
 465
 466         ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
 467 }
 468
 469 static void psb_intel_lvds_commit(struct drm_encoder *encoder)
 470 {
 471         struct drm_device *dev = encoder->dev;
 472         struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
 473         struct psb_intel_mode_device *mode_dev = output->mode_dev;
 474
 475         PSB_DEBUG_ENTRY("\n");
 476
 477         if (mode_dev->backlight_duty_cycle == 0)
 478                 mode_dev->backlight_duty_cycle =
 479                     psb_intel_lvds_get_max_backlight(dev);
 480
 481         psb_intel_lvds_set_power(dev, output, true);
 482 }
 483
 484 static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
 485                                 struct drm_display_mode *mode,
 486                                 struct drm_display_mode *adjusted_mode)
 487 {
 488         struct psb_intel_mode_device *mode_dev =
 489             enc_to_psb_intel_output(encoder)->mode_dev;
 490         struct drm_device *dev = encoder->dev;
 491         u32 pfit_control;
 492
 493         /*
 494          * The LVDS pin pair will already have been turned on in the
 495          * psb_intel_crtc_mode_set since it has a large impact on the DPLL
 496          * settings.
 497          */
 498
 499         /*
 500          * Enable automatic panel scaling so that non-native modes fill the
 501          * screen.  Should be enabled before the pipe is enabled, according to
 502          * register description and PRM.
 503          */
 504         if (mode->hdisplay != adjusted_mode->hdisplay ||
 505             mode->vdisplay != adjusted_mode->vdisplay)
 506                 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
 507                                 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
 508                                 HORIZ_INTERP_BILINEAR);
 509         else
 510                 pfit_control = 0;
 511
 512         if (mode_dev->panel_wants_dither)
 513                 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
 514
 515         REG_WRITE(PFIT_CONTROL, pfit_control);
 516 }
 517
 518 /**
 519  * Detect the LVDS connection.
 520  *
 521  * This always returns CONNECTOR_STATUS_CONNECTED.
 522  * This connector should only have
 523  * been set up if the LVDS was actually connected anyway.
 524  */
 525 static enum drm_connector_status psb_intel_lvds_detect(struct drm_connector
 526                                                    *connector, bool force)
 527 {
 528         return connector_status_connected;
 529 }
 530
 531 /**
 532  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 533  */
 534 static int psb_intel_lvds_get_modes(struct drm_connector *connector)
 535 {
 536         struct drm_device *dev = connector->dev;
 537         struct psb_intel_output *psb_intel_output =
 538                                         to_psb_intel_output(connector);
 539         struct psb_intel_mode_device *mode_dev =
 540                                         psb_intel_output->mode_dev;
 541         int ret = 0;
 542
 543         ret = psb_intel_ddc_get_modes(psb_intel_output);
 544
 545         if (ret)
 546                 return ret;
 547
 548         /* Didn't get an EDID, so
 549          * Set wide sync ranges so we get all modes
 550          * handed to valid_mode for checking
 551          */
 552         connector->display_info.min_vfreq = 0;
 553         connector->display_info.max_vfreq = 200;
 554         connector->display_info.min_hfreq = 0;
 555         connector->display_info.max_hfreq = 200;
 556
 557         if (mode_dev->panel_fixed_mode != NULL) {
 558                 struct drm_display_mode *mode =
 559                     drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
 560                 drm_mode_probed_add(connector, mode);
 561                 return 1;
 562         }
 563
 564         return 0;
 565 }
 566
 567 /**
 568  * psb_intel_lvds_destroy - unregister and free LVDS structures
 569  * @connector: connector to free
 570  *
 571  * Unregister the DDC bus for this connector then free the driver private
 572  * structure.
 573  */
 574 void psb_intel_lvds_destroy(struct drm_connector *connector)
 575 {
 576         struct psb_intel_output *psb_intel_output =
 577                                         to_psb_intel_output(connector);
 578
 579         if (psb_intel_output->ddc_bus)
 580                 psb_intel_i2c_destroy(psb_intel_output->ddc_bus);
 581         drm_sysfs_connector_remove(connector);
 582         drm_connector_cleanup(connector);
 583         kfree(connector);
 584 }
 585
 586 int psb_intel_lvds_set_property(struct drm_connector *connector,
 587                                        struct drm_property *property,
 588                                        uint64_t value)
 589 {
 590         struct drm_encoder *pEncoder = connector->encoder;
 591
 592         PSB_DEBUG_ENTRY("\n");
 593
 594         if (!strcmp(property->name, "scaling mode") && pEncoder) {
 595                 struct psb_intel_crtc *pPsbCrtc =
 596                                         to_psb_intel_crtc(pEncoder->crtc);
 597                 uint64_t curValue;
 598
 599                 PSB_DEBUG_ENTRY("scaling mode\n");
 600
 601                 if (!pPsbCrtc)
 602                         goto set_prop_error;
 603
 604                 switch (value) {
 605                 case DRM_MODE_SCALE_FULLSCREEN:
 606                         break;
 607                 case DRM_MODE_SCALE_NO_SCALE:
 608                         break;
 609                 case DRM_MODE_SCALE_ASPECT:
 610                         break;
 611                 default:
 612                         goto set_prop_error;
 613                 }
 614
 615                 if (drm_connector_property_get_value(connector,
 616                                                      property,
 617                                                      &curValue))
 618                         goto set_prop_error;
 619
 620                 if (curValue == value)
 621                         goto set_prop_done;
 622
 623                 if (drm_connector_property_set_value(connector,
 624                                                         property,
 625                                                         value))
 626                         goto set_prop_error;
 627
 628                 if (pPsbCrtc->saved_mode.hdisplay != 0 &&
 629                     pPsbCrtc->saved_mode.vdisplay != 0) {
 630                         if (!drm_crtc_helper_set_mode(pEncoder->crtc,
 631                                                       &pPsbCrtc->saved_mode,
 632                                                       pEncoder->crtc->x,
 633                                                       pEncoder->crtc->y,
 634                                                       pEncoder->crtc->fb))
 635                                 goto set_prop_error;
 636                 }
 637         } else if (!strcmp(property->name, "backlight") && pEncoder) {
 638                 PSB_DEBUG_ENTRY("backlight\n");
 639
 640                 if (drm_connector_property_set_value(connector,
 641                                                         property,
 642                                                         value))
 643                         goto set_prop_error;
 644                 else {
 645 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
 646                         struct backlight_device bd;
 647                         bd.props.brightness = value;
 648                         psb_set_brightness(&bd);
 649 #endif
 650                 }
 651         } else if (!strcmp(property->name, "DPMS") && pEncoder) {
 652                 struct drm_encoder_helper_funcs *pEncHFuncs
 653                                                 = pEncoder->helper_private;
 654                 PSB_DEBUG_ENTRY("DPMS\n");
 655                 pEncHFuncs->dpms(pEncoder, value);
 656         }
 657
 658 set_prop_done:
 659         return 0;
 660 set_prop_error:
 661         return -1;
 662 }
 663
 664 static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
 665         .dpms = psb_intel_lvds_encoder_dpms,
 666         .mode_fixup = psb_intel_lvds_mode_fixup,
 667         .prepare = psb_intel_lvds_prepare,
 668         .mode_set = psb_intel_lvds_mode_set,
 669         .commit = psb_intel_lvds_commit,
 670 };
 671
 672 static const struct drm_connector_helper_funcs
 673                                 psb_intel_lvds_connector_helper_funcs = {
 674         .get_modes = psb_intel_lvds_get_modes,
 675         .mode_valid = psb_intel_lvds_mode_valid,
 676         .best_encoder = psb_intel_best_encoder,
 677 };
 678
 679 static const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
 680         .dpms = drm_helper_connector_dpms,
 681         .save = psb_intel_lvds_save,
 682         .restore = psb_intel_lvds_restore,
 683         .detect = psb_intel_lvds_detect,
 684         .fill_modes = drm_helper_probe_single_connector_modes,
 685         .set_property = psb_intel_lvds_set_property,
 686         .destroy = psb_intel_lvds_destroy,
 687 };
 688
 689
 690 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
 691 {
 692         drm_encoder_cleanup(encoder);
 693 }
 694
 695 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
 696         .destroy = psb_intel_lvds_enc_destroy,
 697 };
 698
 699
 700
 701 /**
 702  * psb_intel_lvds_init - setup LVDS connectors on this device
 703  * @dev: drm device
 704  *
 705  * Create the connector, register the LVDS DDC bus, and try to figure out what
 706  * modes we can display on the LVDS panel (if present).
 707  */
 708 void psb_intel_lvds_init(struct drm_device *dev,
 709                      struct psb_intel_mode_device *mode_dev)
 710 {
 711         struct psb_intel_output *psb_intel_output;
 712         struct psb_intel_lvds_priv *lvds_priv;
 713         struct drm_connector *connector;
 714         struct drm_encoder *encoder;
 715         struct drm_display_mode *scan;  /* *modes, *bios_mode; */
 716         struct drm_crtc *crtc;
 717         struct drm_psb_private *dev_priv =
 718                                 (struct drm_psb_private *)dev->dev_private;
 719         u32 lvds;
 720         int pipe;
 721
 722         psb_intel_output = kzalloc(sizeof(struct psb_intel_output), GFP_KERNEL);
 723         if (!psb_intel_output)
 724                 return;
 725
 726         lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
 727         if (!lvds_priv) {
 728                 kfree(psb_intel_output);
 729                 DRM_DEBUG("LVDS private allocation error\n");
 730                 return;
 731         }
 732
 733         psb_intel_output->dev_priv = lvds_priv;
 734
 735         psb_intel_output->mode_dev = mode_dev;
 736         connector = &psb_intel_output->base;
 737         encoder = &psb_intel_output->enc;
 738         drm_connector_init(dev, &psb_intel_output->base,
 739                            &psb_intel_lvds_connector_funcs,
 740                            DRM_MODE_CONNECTOR_LVDS);
 741
 742         drm_encoder_init(dev, &psb_intel_output->enc,
 743                          &psb_intel_lvds_enc_funcs,
 744                          DRM_MODE_ENCODER_LVDS);
 745
 746         drm_mode_connector_attach_encoder(&psb_intel_output->base,
 747                                           &psb_intel_output->enc);
 748         psb_intel_output->type = INTEL_OUTPUT_LVDS;
 749
 750         drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
 751         drm_connector_helper_add(connector,
 752                                  &psb_intel_lvds_connector_helper_funcs);
 753         connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 754         connector->interlace_allowed = false;
 755         connector->doublescan_allowed = false;
 756
 757         /*Attach connector properties*/
 758         drm_connector_attach_property(connector,
 759                                       dev->mode_config.scaling_mode_property,
 760                                       DRM_MODE_SCALE_FULLSCREEN);
 761         drm_connector_attach_property(connector,
 762                                       dev_priv->backlight_property,
 763                                       BRIGHTNESS_MAX_LEVEL);
 764
 765         /**
 766          * Set up I2C bus
 767          * FIXME: distroy i2c_bus when exit
 768          */
 769         psb_intel_output->i2c_bus = psb_intel_i2c_create(dev,
 770                                                          GPIOB,
 771                                                          "LVDSBLC_B");
 772         if (!psb_intel_output->i2c_bus) {
 773                 dev_printk(KERN_ERR,
 774                         &dev->pdev->dev, "I2C bus registration failed.\n");
 775                 goto failed_blc_i2c;
 776         }
 777         psb_intel_output->i2c_bus->slave_addr = 0x2C;
 778         dev_priv->lvds_i2c_bus =  psb_intel_output->i2c_bus;
 779
 780         /*
 781          * LVDS discovery:
 782          * 1) check for EDID on DDC
 783          * 2) check for VBT data
 784          * 3) check to see if LVDS is already on
 785          *    if none of the above, no panel
 786          * 4) make sure lid is open
 787          *    if closed, act like it's not there for now
 788          */
 789
 790         /* Set up the DDC bus. */
 791         psb_intel_output->ddc_bus = psb_intel_i2c_create(dev,
 792                                                          GPIOC,
 793                                                          "LVDSDDC_C");
 794         if (!psb_intel_output->ddc_bus) {
 795                 dev_printk(KERN_ERR, &dev->pdev->dev,
 796                            "DDC bus registration " "failed.\n");
 797                 goto failed_ddc;
 798         }
 799
 800         /*
 801          * Attempt to get the fixed panel mode from DDC.  Assume that the
 802          * preferred mode is the right one.
 803          */
 804         psb_intel_ddc_get_modes(psb_intel_output);
 805         list_for_each_entry(scan, &connector->probed_modes, head) {
 806                 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
 807                         mode_dev->panel_fixed_mode =
 808                             drm_mode_duplicate(dev, scan);
 809                         goto out;       /* FIXME: check for quirks */
 810                 }
 811         }
 812
 813         /* Failed to get EDID, what about VBT? do we need this?*/
 814         if (mode_dev->vbt_mode)
 815                 mode_dev->panel_fixed_mode =
 816                     drm_mode_duplicate(dev, mode_dev->vbt_mode);
 817
 818         if (!mode_dev->panel_fixed_mode)
 819                 if (dev_priv->lfp_lvds_vbt_mode)
 820                         mode_dev->panel_fixed_mode =
 821                                 drm_mode_duplicate(dev,
 822                                         dev_priv->lfp_lvds_vbt_mode);
 823
 824         /*
 825          * If we didn't get EDID, try checking if the panel is already turned
 826          * on.  If so, assume that whatever is currently programmed is the
 827          * correct mode.
 828          */
 829         lvds = REG_READ(LVDS);
 830         pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
 831         crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
 832
 833         if (crtc && (lvds & LVDS_PORT_EN)) {
 834                 mode_dev->panel_fixed_mode =
 835                     psb_intel_crtc_mode_get(dev, crtc);
 836                 if (mode_dev->panel_fixed_mode) {
 837                         mode_dev->panel_fixed_mode->type |=
 838                             DRM_MODE_TYPE_PREFERRED;
 839                         goto out;       /* FIXME: check for quirks */
 840                 }
 841         }
 842
 843         /* If we still don't have a mode after all that, give up. */
 844         if (!mode_dev->panel_fixed_mode) {
 845                 DRM_DEBUG
 846                         ("Found no modes on the lvds, ignoring the LVDS\n");
 847                 goto failed_find;
 848         }
 849
 850         /*
 851          * Blacklist machines with BIOSes that list an LVDS panel without
 852          * actually having one.
 853          */
 854 out:
 855         drm_sysfs_connector_add(connector);
 856
 857         PSB_DEBUG_ENTRY("hdisplay = %d\n",
 858                  mode_dev->panel_fixed_mode->hdisplay);
 859         PSB_DEBUG_ENTRY(" vdisplay = %d\n",
 860                  mode_dev->panel_fixed_mode->vdisplay);
 861         PSB_DEBUG_ENTRY(" hsync_start = %d\n",
 862                  mode_dev->panel_fixed_mode->hsync_start);
 863         PSB_DEBUG_ENTRY(" hsync_end = %d\n",
 864                  mode_dev->panel_fixed_mode->hsync_end);
 865         PSB_DEBUG_ENTRY(" htotal = %d\n",
 866                  mode_dev->panel_fixed_mode->htotal);
 867         PSB_DEBUG_ENTRY(" vsync_start = %d\n",
 868                  mode_dev->panel_fixed_mode->vsync_start);
 869         PSB_DEBUG_ENTRY(" vsync_end = %d\n",
 870                  mode_dev->panel_fixed_mode->vsync_end);
 871         PSB_DEBUG_ENTRY(" vtotal = %d\n",
 872                  mode_dev->panel_fixed_mode->vtotal);
 873         PSB_DEBUG_ENTRY(" clock = %d\n",
 874                  mode_dev->panel_fixed_mode->clock);
 875
 876         return;
 877
 878 failed_find:
 879         if (psb_intel_output->ddc_bus)
 880                 psb_intel_i2c_destroy(psb_intel_output->ddc_bus);
 881 failed_ddc:
 882         if (psb_intel_output->i2c_bus)
 883                 psb_intel_i2c_destroy(psb_intel_output->i2c_bus);
 884 failed_blc_i2c:
 885         drm_encoder_cleanup(encoder);
 886         drm_connector_cleanup(connector);
 887         kfree(connector);
 888 }
 889