drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c

   1 /*
   2  * Sony ACX565AKM LCD Panel driver
   3  *
   4  * Copyright (C) 2010 Nokia Corporation
   5  *
   6  * Original Driver Author: Imre Deak <imre.deak@nokia.com>
   7  * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com>
   8  * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License version 2 as published by
  12  * the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along with
  20  * this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/delay.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/sched.h>
  30 #include <linux/backlight.h>
  31 #include <linux/fb.h>
  32 #include <linux/gpio.h>
  33 #include <linux/of.h>
  34 #include <linux/of_gpio.h>
  35
  36 #include <video/omapdss.h>
  37 #include <video/omap-panel-data.h>
  38
  39 #define MIPID_CMD_READ_DISP_ID          0x04
  40 #define MIPID_CMD_READ_RED              0x06
  41 #define MIPID_CMD_READ_GREEN            0x07
  42 #define MIPID_CMD_READ_BLUE             0x08
  43 #define MIPID_CMD_READ_DISP_STATUS      0x09
  44 #define MIPID_CMD_RDDSDR                0x0F
  45 #define MIPID_CMD_SLEEP_IN              0x10
  46 #define MIPID_CMD_SLEEP_OUT             0x11
  47 #define MIPID_CMD_DISP_OFF              0x28
  48 #define MIPID_CMD_DISP_ON               0x29
  49 #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
  50 #define MIPID_CMD_READ_DISP_BRIGHTNESS  0x52
  51 #define MIPID_CMD_WRITE_CTRL_DISP       0x53
  52
  53 #define CTRL_DISP_BRIGHTNESS_CTRL_ON    (1 << 5)
  54 #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
  55 #define CTRL_DISP_BACKLIGHT_ON          (1 << 2)
  56 #define CTRL_DISP_AUTO_BRIGHTNESS_ON    (1 << 1)
  57
  58 #define MIPID_CMD_READ_CTRL_DISP        0x54
  59 #define MIPID_CMD_WRITE_CABC            0x55
  60 #define MIPID_CMD_READ_CABC             0x56
  61
  62 #define MIPID_VER_LPH8923               3
  63 #define MIPID_VER_LS041Y3               4
  64 #define MIPID_VER_L4F00311              8
  65 #define MIPID_VER_ACX565AKM             9
  66
  67 struct panel_drv_data {
  68         struct omap_dss_device  dssdev;
  69         struct omap_dss_device *in;
  70
  71         int reset_gpio;
  72         int datapairs;
  73
  74         struct omap_video_timings videomode;
  75
  76         char            *name;
  77         int             enabled;
  78         int             model;
  79         int             revision;
  80         u8              display_id[3];
  81         unsigned        has_bc:1;
  82         unsigned        has_cabc:1;
  83         unsigned        cabc_mode;
  84         unsigned long   hw_guard_end;           /* next value of jiffies
  85                                                    when we can issue the
  86                                                    next sleep in/out command */
  87         unsigned long   hw_guard_wait;          /* max guard time in jiffies */
  88
  89         struct spi_device       *spi;
  90         struct mutex            mutex;
  91
  92         struct backlight_device *bl_dev;
  93 };
  94
  95 static const struct omap_video_timings acx565akm_panel_timings = {
  96         .x_res          = 800,
  97         .y_res          = 480,
  98         .pixelclock     = 24000000,
  99         .hfp            = 28,
 100         .hsw            = 4,
 101         .hbp            = 24,
 102         .vfp            = 3,
 103         .vsw            = 3,
 104         .vbp            = 4,
 105
 106         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
 107         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
 108
 109         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
 110         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
 111         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
 112 };
 113
 114 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
 115
 116 static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
 117                               const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
 118 {
 119         struct spi_message      m;
 120         struct spi_transfer     *x, xfer[5];
 121         int                     r;
 122
 123         BUG_ON(ddata->spi == NULL);
 124
 125         spi_message_init(&m);
 126
 127         memset(xfer, 0, sizeof(xfer));
 128         x = &xfer[0];
 129
 130         cmd &=  0xff;
 131         x->tx_buf = &cmd;
 132         x->bits_per_word = 9;
 133         x->len = 2;
 134
 135         if (rlen > 1 && wlen == 0) {
 136                 /*
 137                  * Between the command and the response data there is a
 138                  * dummy clock cycle. Add an extra bit after the command
 139                  * word to account for this.
 140                  */
 141                 x->bits_per_word = 10;
 142                 cmd <<= 1;
 143         }
 144         spi_message_add_tail(x, &m);
 145
 146         if (wlen) {
 147                 x++;
 148                 x->tx_buf = wbuf;
 149                 x->len = wlen;
 150                 x->bits_per_word = 9;
 151                 spi_message_add_tail(x, &m);
 152         }
 153
 154         if (rlen) {
 155                 x++;
 156                 x->rx_buf       = rbuf;
 157                 x->len          = rlen;
 158                 spi_message_add_tail(x, &m);
 159         }
 160
 161         r = spi_sync(ddata->spi, &m);
 162         if (r < 0)
 163                 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
 164 }
 165
 166 static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
 167 {
 168         acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
 169 }
 170
 171 static inline void acx565akm_write(struct panel_drv_data *ddata,
 172                                int reg, const u8 *buf, int len)
 173 {
 174         acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
 175 }
 176
 177 static inline void acx565akm_read(struct panel_drv_data *ddata,
 178                               int reg, u8 *buf, int len)
 179 {
 180         acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
 181 }
 182
 183 static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
 184 {
 185         ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
 186         ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
 187 }
 188
 189 static void hw_guard_wait(struct panel_drv_data *ddata)
 190 {
 191         unsigned long wait = ddata->hw_guard_end - jiffies;
 192
 193         if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
 194                 set_current_state(TASK_UNINTERRUPTIBLE);
 195                 schedule_timeout(wait);
 196         }
 197 }
 198
 199 static void set_sleep_mode(struct panel_drv_data *ddata, int on)
 200 {
 201         int cmd;
 202
 203         if (on)
 204                 cmd = MIPID_CMD_SLEEP_IN;
 205         else
 206                 cmd = MIPID_CMD_SLEEP_OUT;
 207         /*
 208          * We have to keep 120msec between sleep in/out commands.
 209          * (8.2.15, 8.2.16).
 210          */
 211         hw_guard_wait(ddata);
 212         acx565akm_cmd(ddata, cmd);
 213         hw_guard_start(ddata, 120);
 214 }
 215
 216 static void set_display_state(struct panel_drv_data *ddata, int enabled)
 217 {
 218         int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
 219
 220         acx565akm_cmd(ddata, cmd);
 221 }
 222
 223 static int panel_enabled(struct panel_drv_data *ddata)
 224 {
 225         u32 disp_status;
 226         int enabled;
 227
 228         acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
 229                         (u8 *)&disp_status, 4);
 230         disp_status = __be32_to_cpu(disp_status);
 231         enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
 232         dev_dbg(&ddata->spi->dev,
 233                 "LCD panel %senabled by bootloader (status 0x%04x)\n",
 234                 enabled ? "" : "not ", disp_status);
 235         return enabled;
 236 }
 237
 238 static int panel_detect(struct panel_drv_data *ddata)
 239 {
 240         acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
 241         dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
 242                 ddata->display_id[0],
 243                 ddata->display_id[1],
 244                 ddata->display_id[2]);
 245
 246         switch (ddata->display_id[0]) {
 247         case 0x10:
 248                 ddata->model = MIPID_VER_ACX565AKM;
 249                 ddata->name = "acx565akm";
 250                 ddata->has_bc = 1;
 251                 ddata->has_cabc = 1;
 252                 break;
 253         case 0x29:
 254                 ddata->model = MIPID_VER_L4F00311;
 255                 ddata->name = "l4f00311";
 256                 break;
 257         case 0x45:
 258                 ddata->model = MIPID_VER_LPH8923;
 259                 ddata->name = "lph8923";
 260                 break;
 261         case 0x83:
 262                 ddata->model = MIPID_VER_LS041Y3;
 263                 ddata->name = "ls041y3";
 264                 break;
 265         default:
 266                 ddata->name = "unknown";
 267                 dev_err(&ddata->spi->dev, "invalid display ID\n");
 268                 return -ENODEV;
 269         }
 270
 271         ddata->revision = ddata->display_id[1];
 272
 273         dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
 274                         ddata->name, ddata->revision);
 275
 276         return 0;
 277 }
 278
 279 /*----------------------Backlight Control-------------------------*/
 280
 281 static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
 282 {
 283         u16 ctrl;
 284
 285         acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
 286         if (enable) {
 287                 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
 288                         CTRL_DISP_BACKLIGHT_ON;
 289         } else {
 290                 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
 291                           CTRL_DISP_BACKLIGHT_ON);
 292         }
 293
 294         ctrl |= 1 << 8;
 295         acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
 296 }
 297
 298 static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
 299 {
 300         u16 cabc_ctrl;
 301
 302         ddata->cabc_mode = mode;
 303         if (!ddata->enabled)
 304                 return;
 305         cabc_ctrl = 0;
 306         acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
 307         cabc_ctrl &= ~3;
 308         cabc_ctrl |= (1 << 8) | (mode & 3);
 309         acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
 310 }
 311
 312 static unsigned get_cabc_mode(struct panel_drv_data *ddata)
 313 {
 314         return ddata->cabc_mode;
 315 }
 316
 317 static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
 318 {
 319         u8 cabc_ctrl;
 320
 321         acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
 322         return cabc_ctrl & 3;
 323 }
 324
 325 static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
 326 {
 327         int bv;
 328
 329         bv = level | (1 << 8);
 330         acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
 331
 332         if (level)
 333                 enable_backlight_ctrl(ddata, 1);
 334         else
 335                 enable_backlight_ctrl(ddata, 0);
 336 }
 337
 338 static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
 339 {
 340         u8 bv;
 341
 342         acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
 343
 344         return bv;
 345 }
 346
 347
 348 static int acx565akm_bl_update_status(struct backlight_device *dev)
 349 {
 350         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 351         int level;
 352
 353         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 354
 355         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 356                         dev->props.power == FB_BLANK_UNBLANK)
 357                 level = dev->props.brightness;
 358         else
 359                 level = 0;
 360
 361         if (ddata->has_bc)
 362                 acx565akm_set_brightness(ddata, level);
 363         else
 364                 return -ENODEV;
 365
 366         return 0;
 367 }
 368
 369 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
 370 {
 371         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 372
 373         dev_dbg(&dev->dev, "%s\n", __func__);
 374
 375         if (!ddata->has_bc)
 376                 return -ENODEV;
 377
 378         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 379                         dev->props.power == FB_BLANK_UNBLANK) {
 380                 if (ddata->has_bc)
 381                         return acx565akm_get_actual_brightness(ddata);
 382                 else
 383                         return dev->props.brightness;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
 390 {
 391         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 392         int r;
 393
 394         mutex_lock(&ddata->mutex);
 395         r = acx565akm_bl_update_status(dev);
 396         mutex_unlock(&ddata->mutex);
 397
 398         return r;
 399 }
 400
 401 static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
 402 {
 403         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 404         int r;
 405
 406         mutex_lock(&ddata->mutex);
 407         r = acx565akm_bl_get_intensity(dev);
 408         mutex_unlock(&ddata->mutex);
 409
 410         return r;
 411 }
 412
 413 static const struct backlight_ops acx565akm_bl_ops = {
 414         .get_brightness = acx565akm_bl_get_intensity_locked,
 415         .update_status  = acx565akm_bl_update_status_locked,
 416 };
 417
 418 /*--------------------Auto Brightness control via Sysfs---------------------*/
 419
 420 static const char * const cabc_modes[] = {
 421         "off",          /* always used when CABC is not supported */
 422         "ui",
 423         "still-image",
 424         "moving-image",
 425 };
 426
 427 static ssize_t show_cabc_mode(struct device *dev,
 428                 struct device_attribute *attr,
 429                 char *buf)
 430 {
 431         struct panel_drv_data *ddata = dev_get_drvdata(dev);
 432         const char *mode_str;
 433         int mode;
 434         int len;
 435
 436         if (!ddata->has_cabc)
 437                 mode = 0;
 438         else
 439                 mode = get_cabc_mode(ddata);
 440         mode_str = "unknown";
 441         if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
 442                 mode_str = cabc_modes[mode];
 443         len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
 444
 445         return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
 446 }
 447
 448 static ssize_t store_cabc_mode(struct device *dev,
 449                 struct device_attribute *attr,
 450                 const char *buf, size_t count)
 451 {
 452         struct panel_drv_data *ddata = dev_get_drvdata(dev);
 453         int i;
 454
 455         for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
 456                 const char *mode_str = cabc_modes[i];
 457                 int cmp_len = strlen(mode_str);
 458
 459                 if (count > 0 && buf[count - 1] == '\n')
 460                         count--;
 461                 if (count != cmp_len)
 462                         continue;
 463
 464                 if (strncmp(buf, mode_str, cmp_len) == 0)
 465                         break;
 466         }
 467
 468         if (i == ARRAY_SIZE(cabc_modes))
 469                 return -EINVAL;
 470
 471         if (!ddata->has_cabc && i != 0)
 472                 return -EINVAL;
 473
 474         mutex_lock(&ddata->mutex);
 475         set_cabc_mode(ddata, i);
 476         mutex_unlock(&ddata->mutex);
 477
 478         return count;
 479 }
 480
 481 static ssize_t show_cabc_available_modes(struct device *dev,
 482                 struct device_attribute *attr,
 483                 char *buf)
 484 {
 485         struct panel_drv_data *ddata = dev_get_drvdata(dev);
 486         int len;
 487         int i;
 488
 489         if (!ddata->has_cabc)
 490                 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
 491
 492         for (i = 0, len = 0;
 493              len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
 494                 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
 495                         i ? " " : "", cabc_modes[i],
 496                         i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
 497
 498         return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
 499 }
 500
 501 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
 502                 show_cabc_mode, store_cabc_mode);
 503 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
 504                 show_cabc_available_modes, NULL);
 505
 506 static struct attribute *bldev_attrs[] = {
 507         &dev_attr_cabc_mode.attr,
 508         &dev_attr_cabc_available_modes.attr,
 509         NULL,
 510 };
 511
 512 static struct attribute_group bldev_attr_group = {
 513         .attrs = bldev_attrs,
 514 };
 515
 516 static int acx565akm_connect(struct omap_dss_device *dssdev)
 517 {
 518         struct panel_drv_data *ddata = to_panel_data(dssdev);
 519         struct omap_dss_device *in = ddata->in;
 520         int r;
 521
 522         if (omapdss_device_is_connected(dssdev))
 523                 return 0;
 524
 525         r = in->ops.sdi->connect(in, dssdev);
 526         if (r)
 527                 return r;
 528
 529         return 0;
 530 }
 531
 532 static void acx565akm_disconnect(struct omap_dss_device *dssdev)
 533 {
 534         struct panel_drv_data *ddata = to_panel_data(dssdev);
 535         struct omap_dss_device *in = ddata->in;
 536
 537         if (!omapdss_device_is_connected(dssdev))
 538                 return;
 539
 540         in->ops.sdi->disconnect(in, dssdev);
 541 }
 542
 543 static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
 544 {
 545         struct panel_drv_data *ddata = to_panel_data(dssdev);
 546         struct omap_dss_device *in = ddata->in;
 547         int r;
 548
 549         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 550
 551         in->ops.sdi->set_timings(in, &ddata->videomode);
 552
 553         if (ddata->datapairs > 0)
 554                 in->ops.sdi->set_datapairs(in, ddata->datapairs);
 555
 556         r = in->ops.sdi->enable(in);
 557         if (r) {
 558                 pr_err("%s sdi enable failed\n", __func__);
 559                 return r;
 560         }
 561
 562         /*FIXME tweak me */
 563         msleep(50);
 564
 565         if (gpio_is_valid(ddata->reset_gpio))
 566                 gpio_set_value(ddata->reset_gpio, 1);
 567
 568         if (ddata->enabled) {
 569                 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
 570                 return 0;
 571         }
 572
 573         /*
 574          * We have to meet all the following delay requirements:
 575          * 1. tRW: reset pulse width 10usec (7.12.1)
 576          * 2. tRT: reset cancel time 5msec (7.12.1)
 577          * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
 578          *    case (7.6.2)
 579          * 4. 120msec before the sleep out command (7.12.1)
 580          */
 581         msleep(120);
 582
 583         set_sleep_mode(ddata, 0);
 584         ddata->enabled = 1;
 585
 586         /* 5msec between sleep out and the next command. (8.2.16) */
 587         usleep_range(5000, 10000);
 588         set_display_state(ddata, 1);
 589         set_cabc_mode(ddata, ddata->cabc_mode);
 590
 591         return acx565akm_bl_update_status(ddata->bl_dev);
 592 }
 593
 594 static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
 595 {
 596         struct panel_drv_data *ddata = to_panel_data(dssdev);
 597         struct omap_dss_device *in = ddata->in;
 598
 599         dev_dbg(dssdev->dev, "%s\n", __func__);
 600
 601         if (!ddata->enabled)
 602                 return;
 603
 604         set_display_state(ddata, 0);
 605         set_sleep_mode(ddata, 1);
 606         ddata->enabled = 0;
 607         /*
 608          * We have to provide PCLK,HS,VS signals for 2 frames (worst case
 609          * ~50msec) after sending the sleep in command and asserting the
 610          * reset signal. We probably could assert the reset w/o the delay
 611          * but we still delay to avoid possible artifacts. (7.6.1)
 612          */
 613         msleep(50);
 614
 615         if (gpio_is_valid(ddata->reset_gpio))
 616                 gpio_set_value(ddata->reset_gpio, 0);
 617
 618         /* FIXME need to tweak this delay */
 619         msleep(100);
 620
 621         in->ops.sdi->disable(in);
 622 }
 623
 624 static int acx565akm_enable(struct omap_dss_device *dssdev)
 625 {
 626         struct panel_drv_data *ddata = to_panel_data(dssdev);
 627         int r;
 628
 629         dev_dbg(dssdev->dev, "%s\n", __func__);
 630
 631         if (!omapdss_device_is_connected(dssdev))
 632                 return -ENODEV;
 633
 634         if (omapdss_device_is_enabled(dssdev))
 635                 return 0;
 636
 637         mutex_lock(&ddata->mutex);
 638         r = acx565akm_panel_power_on(dssdev);
 639         mutex_unlock(&ddata->mutex);
 640         if (r)
 641                 return r;
 642
 643         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 644
 645         return 0;
 646 }
 647
 648 static void acx565akm_disable(struct omap_dss_device *dssdev)
 649 {
 650         struct panel_drv_data *ddata = to_panel_data(dssdev);
 651
 652         dev_dbg(dssdev->dev, "%s\n", __func__);
 653
 654         if (!omapdss_device_is_enabled(dssdev))
 655                 return;
 656
 657         mutex_lock(&ddata->mutex);
 658         acx565akm_panel_power_off(dssdev);
 659         mutex_unlock(&ddata->mutex);
 660
 661         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 662 }
 663
 664 static void acx565akm_set_timings(struct omap_dss_device *dssdev,
 665                 struct omap_video_timings *timings)
 666 {
 667         struct panel_drv_data *ddata = to_panel_data(dssdev);
 668         struct omap_dss_device *in = ddata->in;
 669
 670         ddata->videomode = *timings;
 671         dssdev->panel.timings = *timings;
 672
 673         in->ops.sdi->set_timings(in, timings);
 674 }
 675
 676 static void acx565akm_get_timings(struct omap_dss_device *dssdev,
 677                 struct omap_video_timings *timings)
 678 {
 679         struct panel_drv_data *ddata = to_panel_data(dssdev);
 680
 681         *timings = ddata->videomode;
 682 }
 683
 684 static int acx565akm_check_timings(struct omap_dss_device *dssdev,
 685                 struct omap_video_timings *timings)
 686 {
 687         struct panel_drv_data *ddata = to_panel_data(dssdev);
 688         struct omap_dss_device *in = ddata->in;
 689
 690         return in->ops.sdi->check_timings(in, timings);
 691 }
 692
 693 static struct omap_dss_driver acx565akm_ops = {
 694         .connect        = acx565akm_connect,
 695         .disconnect     = acx565akm_disconnect,
 696
 697         .enable         = acx565akm_enable,
 698         .disable        = acx565akm_disable,
 699
 700         .set_timings    = acx565akm_set_timings,
 701         .get_timings    = acx565akm_get_timings,
 702         .check_timings  = acx565akm_check_timings,
 703
 704         .get_resolution = omapdss_default_get_resolution,
 705 };
 706
 707 static int acx565akm_probe_pdata(struct spi_device *spi)
 708 {
 709         const struct panel_acx565akm_platform_data *pdata;
 710         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 711         struct omap_dss_device *dssdev, *in;
 712
 713         pdata = dev_get_platdata(&spi->dev);
 714
 715         ddata->reset_gpio = pdata->reset_gpio;
 716
 717         in = omap_dss_find_output(pdata->source);
 718         if (in == NULL) {
 719                 dev_err(&spi->dev, "failed to find video source '%s'\n",
 720                                 pdata->source);
 721                 return -EPROBE_DEFER;
 722         }
 723         ddata->in = in;
 724
 725         ddata->datapairs = pdata->datapairs;
 726
 727         dssdev = &ddata->dssdev;
 728         dssdev->name = pdata->name;
 729
 730         return 0;
 731 }
 732
 733 static int acx565akm_probe_of(struct spi_device *spi)
 734 {
 735         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 736         struct device_node *np = spi->dev.of_node;
 737
 738         ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
 739
 740         ddata->in = omapdss_of_find_source_for_first_ep(np);
 741         if (IS_ERR(ddata->in)) {
 742                 dev_err(&spi->dev, "failed to find video source\n");
 743                 return PTR_ERR(ddata->in);
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int acx565akm_probe(struct spi_device *spi)
 750 {
 751         struct panel_drv_data *ddata;
 752         struct omap_dss_device *dssdev;
 753         struct backlight_device *bldev;
 754         int max_brightness, brightness;
 755         struct backlight_properties props;
 756         int r;
 757
 758         dev_dbg(&spi->dev, "%s\n", __func__);
 759
 760         spi->mode = SPI_MODE_3;
 761
 762         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 763         if (ddata == NULL)
 764                 return -ENOMEM;
 765
 766         dev_set_drvdata(&spi->dev, ddata);
 767
 768         ddata->spi = spi;
 769
 770         mutex_init(&ddata->mutex);
 771
 772         if (dev_get_platdata(&spi->dev)) {
 773                 r = acx565akm_probe_pdata(spi);
 774                 if (r)
 775                         return r;
 776         } else if (spi->dev.of_node) {
 777                 r = acx565akm_probe_of(spi);
 778                 if (r)
 779                         return r;
 780         } else {
 781                 dev_err(&spi->dev, "platform data missing!\n");
 782                 return -ENODEV;
 783         }
 784
 785         if (gpio_is_valid(ddata->reset_gpio)) {
 786                 r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
 787                                 GPIOF_OUT_INIT_LOW, "lcd reset");
 788                 if (r)
 789                         goto err_gpio;
 790         }
 791
 792         if (gpio_is_valid(ddata->reset_gpio))
 793                 gpio_set_value(ddata->reset_gpio, 1);
 794
 795         /*
 796          * After reset we have to wait 5 msec before the first
 797          * command can be sent.
 798          */
 799         usleep_range(5000, 10000);
 800
 801         ddata->enabled = panel_enabled(ddata);
 802
 803         r = panel_detect(ddata);
 804
 805         if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
 806                 gpio_set_value(ddata->reset_gpio, 0);
 807
 808         if (r) {
 809                 dev_err(&spi->dev, "%s panel detect error\n", __func__);
 810                 goto err_detect;
 811         }
 812
 813         memset(&props, 0, sizeof(props));
 814         props.fb_blank = FB_BLANK_UNBLANK;
 815         props.power = FB_BLANK_UNBLANK;
 816         props.type = BACKLIGHT_RAW;
 817
 818         bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
 819                         ddata, &acx565akm_bl_ops, &props);
 820         if (IS_ERR(bldev)) {
 821                 r = PTR_ERR(bldev);
 822                 goto err_reg_bl;
 823         }
 824         ddata->bl_dev = bldev;
 825         if (ddata->has_cabc) {
 826                 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
 827                 if (r) {
 828                         dev_err(&bldev->dev,
 829                                 "%s failed to create sysfs files\n", __func__);
 830                         goto err_sysfs;
 831                 }
 832                 ddata->cabc_mode = get_hw_cabc_mode(ddata);
 833         }
 834
 835         max_brightness = 255;
 836
 837         if (ddata->has_bc)
 838                 brightness = acx565akm_get_actual_brightness(ddata);
 839         else
 840                 brightness = 0;
 841
 842         bldev->props.max_brightness = max_brightness;
 843         bldev->props.brightness = brightness;
 844
 845         acx565akm_bl_update_status(bldev);
 846
 847
 848         ddata->videomode = acx565akm_panel_timings;
 849
 850         dssdev = &ddata->dssdev;
 851         dssdev->dev = &spi->dev;
 852         dssdev->driver = &acx565akm_ops;
 853         dssdev->type = OMAP_DISPLAY_TYPE_SDI;
 854         dssdev->owner = THIS_MODULE;
 855         dssdev->panel.timings = ddata->videomode;
 856
 857         r = omapdss_register_display(dssdev);
 858         if (r) {
 859                 dev_err(&spi->dev, "Failed to register panel\n");
 860                 goto err_reg;
 861         }
 862
 863         return 0;
 864
 865 err_reg:
 866         sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
 867 err_sysfs:
 868         backlight_device_unregister(bldev);
 869 err_reg_bl:
 870 err_detect:
 871 err_gpio:
 872         omap_dss_put_device(ddata->in);
 873         return r;
 874 }
 875
 876 static int acx565akm_remove(struct spi_device *spi)
 877 {
 878         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 879         struct omap_dss_device *dssdev = &ddata->dssdev;
 880         struct omap_dss_device *in = ddata->in;
 881
 882         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 883
 884         sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
 885         backlight_device_unregister(ddata->bl_dev);
 886
 887         omapdss_unregister_display(dssdev);
 888
 889         acx565akm_disable(dssdev);
 890         acx565akm_disconnect(dssdev);
 891
 892         omap_dss_put_device(in);
 893
 894         return 0;
 895 }
 896
 897 static const struct of_device_id acx565akm_of_match[] = {
 898         { .compatible = "omapdss,sony,acx565akm", },
 899         {},
 900 };
 901 MODULE_DEVICE_TABLE(of, acx565akm_of_match);
 902
 903 static struct spi_driver acx565akm_driver = {
 904         .driver = {
 905                 .name   = "acx565akm",
 906                 .of_match_table = acx565akm_of_match,
 907                 .suppress_bind_attrs = true,
 908         },
 909         .probe  = acx565akm_probe,
 910         .remove = acx565akm_remove,
 911 };
 912
 913 module_spi_driver(acx565akm_driver);
 914
 915 MODULE_AUTHOR("Nokia Corporation");
 916 MODULE_DESCRIPTION("acx565akm LCD Driver");
 917 MODULE_LICENSE("GPL");