linux/drivers/gpu/drm/gma500/psb_intel_lvds.c
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   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
  50struct 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 */
  71static 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 */
  99static 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
 140static 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 */
 173void 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 */
 195static 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 */
 220static 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
 253static 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
 265static 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
 305static 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
 346enum drm_mode_status 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
 374bool 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
 437static 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
 455static 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
 468static 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 */
 504static 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 */
 536void 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
 547int 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
 609set_prop_done:
 610        return 0;
 611set_prop_error:
 612        return -1;
 613}
 614
 615static 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
 623const 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
 630const 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
 638static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
 639{
 640        drm_encoder_cleanup(encoder);
 641}
 642
 643const 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 */
 656void 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         */
 810out:
 811        mutex_unlock(&dev->mode_config.mutex);
 812        drm_connector_register(connector);
 813        return;
 814
 815failed_find:
 816        mutex_unlock(&dev->mode_config.mutex);
 817        psb_intel_i2c_destroy(lvds_priv->ddc_bus);
 818failed_ddc:
 819        psb_intel_i2c_destroy(lvds_priv->i2c_bus);
 820failed_blc_i2c:
 821        drm_encoder_cleanup(encoder);
 822        drm_connector_cleanup(connector);
 823failed_connector:
 824        kfree(gma_connector);
 825failed_encoder:
 826        kfree(gma_encoder);
 827}
 828
 829