drivers/video/omap2/displays-new/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
  34 #include <video/omapdss.h>
  35 #include <video/omap-panel-data.h>
  36
  37 #define MIPID_CMD_READ_DISP_ID          0x04
  38 #define MIPID_CMD_READ_RED              0x06
  39 #define MIPID_CMD_READ_GREEN            0x07
  40 #define MIPID_CMD_READ_BLUE             0x08
  41 #define MIPID_CMD_READ_DISP_STATUS      0x09
  42 #define MIPID_CMD_RDDSDR                0x0F
  43 #define MIPID_CMD_SLEEP_IN              0x10
  44 #define MIPID_CMD_SLEEP_OUT             0x11
  45 #define MIPID_CMD_DISP_OFF              0x28
  46 #define MIPID_CMD_DISP_ON               0x29
  47 #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
  48 #define MIPID_CMD_READ_DISP_BRIGHTNESS  0x52
  49 #define MIPID_CMD_WRITE_CTRL_DISP       0x53
  50
  51 #define CTRL_DISP_BRIGHTNESS_CTRL_ON    (1 << 5)
  52 #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
  53 #define CTRL_DISP_BACKLIGHT_ON          (1 << 2)
  54 #define CTRL_DISP_AUTO_BRIGHTNESS_ON    (1 << 1)
  55
  56 #define MIPID_CMD_READ_CTRL_DISP        0x54
  57 #define MIPID_CMD_WRITE_CABC            0x55
  58 #define MIPID_CMD_READ_CABC             0x56
  59
  60 #define MIPID_VER_LPH8923               3
  61 #define MIPID_VER_LS041Y3               4
  62 #define MIPID_VER_L4F00311              8
  63 #define MIPID_VER_ACX565AKM             9
  64
  65 struct panel_drv_data {
  66         struct omap_dss_device  dssdev;
  67         struct omap_dss_device *in;
  68
  69         int reset_gpio;
  70         int datapairs;
  71
  72         struct omap_video_timings videomode;
  73
  74         char            *name;
  75         int             enabled;
  76         int             model;
  77         int             revision;
  78         u8              display_id[3];
  79         unsigned        has_bc:1;
  80         unsigned        has_cabc:1;
  81         unsigned        cabc_mode;
  82         unsigned long   hw_guard_end;           /* next value of jiffies
  83                                                    when we can issue the
  84                                                    next sleep in/out command */
  85         unsigned long   hw_guard_wait;          /* max guard time in jiffies */
  86
  87         struct spi_device       *spi;
  88         struct mutex            mutex;
  89
  90         struct backlight_device *bl_dev;
  91 };
  92
  93 static const struct omap_video_timings acx565akm_panel_timings = {
  94         .x_res          = 800,
  95         .y_res          = 480,
  96         .pixel_clock    = 24000,
  97         .hfp            = 28,
  98         .hsw            = 4,
  99         .hbp            = 24,
 100         .vfp            = 3,
 101         .vsw            = 3,
 102         .vbp            = 4,
 103
 104         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
 105         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
 106
 107         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
 108         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
 109         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
 110 };
 111
 112 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
 113
 114 static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
 115                               const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
 116 {
 117         struct spi_message      m;
 118         struct spi_transfer     *x, xfer[5];
 119         int                     r;
 120
 121         BUG_ON(ddata->spi == NULL);
 122
 123         spi_message_init(&m);
 124
 125         memset(xfer, 0, sizeof(xfer));
 126         x = &xfer[0];
 127
 128         cmd &=  0xff;
 129         x->tx_buf = &cmd;
 130         x->bits_per_word = 9;
 131         x->len = 2;
 132
 133         if (rlen > 1 && wlen == 0) {
 134                 /*
 135                  * Between the command and the response data there is a
 136                  * dummy clock cycle. Add an extra bit after the command
 137                  * word to account for this.
 138                  */
 139                 x->bits_per_word = 10;
 140                 cmd <<= 1;
 141         }
 142         spi_message_add_tail(x, &m);
 143
 144         if (wlen) {
 145                 x++;
 146                 x->tx_buf = wbuf;
 147                 x->len = wlen;
 148                 x->bits_per_word = 9;
 149                 spi_message_add_tail(x, &m);
 150         }
 151
 152         if (rlen) {
 153                 x++;
 154                 x->rx_buf       = rbuf;
 155                 x->len          = rlen;
 156                 spi_message_add_tail(x, &m);
 157         }
 158
 159         r = spi_sync(ddata->spi, &m);
 160         if (r < 0)
 161                 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
 162 }
 163
 164 static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
 165 {
 166         acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
 167 }
 168
 169 static inline void acx565akm_write(struct panel_drv_data *ddata,
 170                                int reg, const u8 *buf, int len)
 171 {
 172         acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
 173 }
 174
 175 static inline void acx565akm_read(struct panel_drv_data *ddata,
 176                               int reg, u8 *buf, int len)
 177 {
 178         acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
 179 }
 180
 181 static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
 182 {
 183         ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
 184         ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
 185 }
 186
 187 static void hw_guard_wait(struct panel_drv_data *ddata)
 188 {
 189         unsigned long wait = ddata->hw_guard_end - jiffies;
 190
 191         if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
 192                 set_current_state(TASK_UNINTERRUPTIBLE);
 193                 schedule_timeout(wait);
 194         }
 195 }
 196
 197 static void set_sleep_mode(struct panel_drv_data *ddata, int on)
 198 {
 199         int cmd;
 200
 201         if (on)
 202                 cmd = MIPID_CMD_SLEEP_IN;
 203         else
 204                 cmd = MIPID_CMD_SLEEP_OUT;
 205         /*
 206          * We have to keep 120msec between sleep in/out commands.
 207          * (8.2.15, 8.2.16).
 208          */
 209         hw_guard_wait(ddata);
 210         acx565akm_cmd(ddata, cmd);
 211         hw_guard_start(ddata, 120);
 212 }
 213
 214 static void set_display_state(struct panel_drv_data *ddata, int enabled)
 215 {
 216         int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
 217
 218         acx565akm_cmd(ddata, cmd);
 219 }
 220
 221 static int panel_enabled(struct panel_drv_data *ddata)
 222 {
 223         u32 disp_status;
 224         int enabled;
 225
 226         acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
 227                         (u8 *)&disp_status, 4);
 228         disp_status = __be32_to_cpu(disp_status);
 229         enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
 230         dev_dbg(&ddata->spi->dev,
 231                 "LCD panel %senabled by bootloader (status 0x%04x)\n",
 232                 enabled ? "" : "not ", disp_status);
 233         return enabled;
 234 }
 235
 236 static int panel_detect(struct panel_drv_data *ddata)
 237 {
 238         acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
 239         dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
 240                 ddata->display_id[0],
 241                 ddata->display_id[1],
 242                 ddata->display_id[2]);
 243
 244         switch (ddata->display_id[0]) {
 245         case 0x10:
 246                 ddata->model = MIPID_VER_ACX565AKM;
 247                 ddata->name = "acx565akm";
 248                 ddata->has_bc = 1;
 249                 ddata->has_cabc = 1;
 250                 break;
 251         case 0x29:
 252                 ddata->model = MIPID_VER_L4F00311;
 253                 ddata->name = "l4f00311";
 254                 break;
 255         case 0x45:
 256                 ddata->model = MIPID_VER_LPH8923;
 257                 ddata->name = "lph8923";
 258                 break;
 259         case 0x83:
 260                 ddata->model = MIPID_VER_LS041Y3;
 261                 ddata->name = "ls041y3";
 262                 break;
 263         default:
 264                 ddata->name = "unknown";
 265                 dev_err(&ddata->spi->dev, "invalid display ID\n");
 266                 return -ENODEV;
 267         }
 268
 269         ddata->revision = ddata->display_id[1];
 270
 271         dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
 272                         ddata->name, ddata->revision);
 273
 274         return 0;
 275 }
 276
 277 /*----------------------Backlight Control-------------------------*/
 278
 279 static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
 280 {
 281         u16 ctrl;
 282
 283         acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
 284         if (enable) {
 285                 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
 286                         CTRL_DISP_BACKLIGHT_ON;
 287         } else {
 288                 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
 289                           CTRL_DISP_BACKLIGHT_ON);
 290         }
 291
 292         ctrl |= 1 << 8;
 293         acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
 294 }
 295
 296 static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
 297 {
 298         u16 cabc_ctrl;
 299
 300         ddata->cabc_mode = mode;
 301         if (!ddata->enabled)
 302                 return;
 303         cabc_ctrl = 0;
 304         acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
 305         cabc_ctrl &= ~3;
 306         cabc_ctrl |= (1 << 8) | (mode & 3);
 307         acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
 308 }
 309
 310 static unsigned get_cabc_mode(struct panel_drv_data *ddata)
 311 {
 312         return ddata->cabc_mode;
 313 }
 314
 315 static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
 316 {
 317         u8 cabc_ctrl;
 318
 319         acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
 320         return cabc_ctrl & 3;
 321 }
 322
 323 static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
 324 {
 325         int bv;
 326
 327         bv = level | (1 << 8);
 328         acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
 329
 330         if (level)
 331                 enable_backlight_ctrl(ddata, 1);
 332         else
 333                 enable_backlight_ctrl(ddata, 0);
 334 }
 335
 336 static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
 337 {
 338         u8 bv;
 339
 340         acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
 341
 342         return bv;
 343 }
 344
 345
 346 static int acx565akm_bl_update_status(struct backlight_device *dev)
 347 {
 348         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 349         int r;
 350         int level;
 351
 352         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 353
 354         mutex_lock(&ddata->mutex);
 355
 356         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 357                         dev->props.power == FB_BLANK_UNBLANK)
 358                 level = dev->props.brightness;
 359         else
 360                 level = 0;
 361
 362         r = 0;
 363         if (ddata->has_bc)
 364                 acx565akm_set_brightness(ddata, level);
 365         else
 366                 r = -ENODEV;
 367
 368         mutex_unlock(&ddata->mutex);
 369
 370         return r;
 371 }
 372
 373 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
 374 {
 375         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 376
 377         dev_dbg(&dev->dev, "%s\n", __func__);
 378
 379         if (!ddata->has_bc)
 380                 return -ENODEV;
 381
 382         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 383                         dev->props.power == FB_BLANK_UNBLANK) {
 384                 if (ddata->has_bc)
 385                         return acx565akm_get_actual_brightness(ddata);
 386                 else
 387                         return dev->props.brightness;
 388         }
 389
 390         return 0;
 391 }
 392
 393 static const struct backlight_ops acx565akm_bl_ops = {
 394         .get_brightness = acx565akm_bl_get_intensity,
 395         .update_status  = acx565akm_bl_update_status,
 396 };
 397
 398 /*--------------------Auto Brightness control via Sysfs---------------------*/
 399
 400 static const char * const cabc_modes[] = {
 401         "off",          /* always used when CABC is not supported */
 402         "ui",
 403         "still-image",
 404         "moving-image",
 405 };
 406
 407 static ssize_t show_cabc_mode(struct device *dev,
 408                 struct device_attribute *attr,
 409                 char *buf)
 410 {
 411         struct panel_drv_data *ddata = dev_get_drvdata(dev);
 412         const char *mode_str;
 413         int mode;
 414         int len;
 415
 416         if (!ddata->has_cabc)
 417                 mode = 0;
 418         else
 419                 mode = get_cabc_mode(ddata);
 420         mode_str = "unknown";
 421         if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
 422                 mode_str = cabc_modes[mode];
 423         len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
 424
 425         return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
 426 }
 427
 428 static ssize_t store_cabc_mode(struct device *dev,
 429                 struct device_attribute *attr,
 430                 const char *buf, size_t count)
 431 {
 432         struct panel_drv_data *ddata = dev_get_drvdata(dev);
 433         int i;
 434
 435         for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
 436                 const char *mode_str = cabc_modes[i];
 437                 int cmp_len = strlen(mode_str);
 438
 439                 if (count > 0 && buf[count - 1] == '\n')
 440                         count--;
 441                 if (count != cmp_len)
 442                         continue;
 443
 444                 if (strncmp(buf, mode_str, cmp_len) == 0)
 445                         break;
 446         }
 447
 448         if (i == ARRAY_SIZE(cabc_modes))
 449                 return -EINVAL;
 450
 451         if (!ddata->has_cabc && i != 0)
 452                 return -EINVAL;
 453
 454         mutex_lock(&ddata->mutex);
 455         set_cabc_mode(ddata, i);
 456         mutex_unlock(&ddata->mutex);
 457
 458         return count;
 459 }
 460
 461 static ssize_t show_cabc_available_modes(struct device *dev,
 462                 struct device_attribute *attr,
 463                 char *buf)
 464 {
 465         struct panel_drv_data *ddata = dev_get_drvdata(dev);
 466         int len;
 467         int i;
 468
 469         if (!ddata->has_cabc)
 470                 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
 471
 472         for (i = 0, len = 0;
 473              len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
 474                 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
 475                         i ? " " : "", cabc_modes[i],
 476                         i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
 477
 478         return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
 479 }
 480
 481 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
 482                 show_cabc_mode, store_cabc_mode);
 483 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
 484                 show_cabc_available_modes, NULL);
 485
 486 static struct attribute *bldev_attrs[] = {
 487         &dev_attr_cabc_mode.attr,
 488         &dev_attr_cabc_available_modes.attr,
 489         NULL,
 490 };
 491
 492 static struct attribute_group bldev_attr_group = {
 493         .attrs = bldev_attrs,
 494 };
 495
 496 static int acx565akm_connect(struct omap_dss_device *dssdev)
 497 {
 498         struct panel_drv_data *ddata = to_panel_data(dssdev);
 499         struct omap_dss_device *in = ddata->in;
 500         int r;
 501
 502         if (omapdss_device_is_connected(dssdev))
 503                 return 0;
 504
 505         r = in->ops.sdi->connect(in, dssdev);
 506         if (r)
 507                 return r;
 508
 509         return 0;
 510 }
 511
 512 static void acx565akm_disconnect(struct omap_dss_device *dssdev)
 513 {
 514         struct panel_drv_data *ddata = to_panel_data(dssdev);
 515         struct omap_dss_device *in = ddata->in;
 516
 517         if (!omapdss_device_is_connected(dssdev))
 518                 return;
 519
 520         in->ops.sdi->disconnect(in, dssdev);
 521 }
 522
 523 static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
 524 {
 525         struct panel_drv_data *ddata = to_panel_data(dssdev);
 526         struct omap_dss_device *in = ddata->in;
 527         int r;
 528
 529         mutex_lock(&ddata->mutex);
 530
 531         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 532
 533         in->ops.sdi->set_timings(in, &ddata->videomode);
 534         in->ops.sdi->set_datapairs(in, ddata->datapairs);
 535
 536         r = in->ops.sdi->enable(in);
 537         if (r) {
 538                 pr_err("%s sdi enable failed\n", __func__);
 539                 return r;
 540         }
 541
 542         /*FIXME tweak me */
 543         msleep(50);
 544
 545         if (gpio_is_valid(ddata->reset_gpio))
 546                 gpio_set_value(ddata->reset_gpio, 1);
 547
 548         if (ddata->enabled) {
 549                 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
 550                 return 0;
 551         }
 552
 553         /*
 554          * We have to meet all the following delay requirements:
 555          * 1. tRW: reset pulse width 10usec (7.12.1)
 556          * 2. tRT: reset cancel time 5msec (7.12.1)
 557          * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
 558          *    case (7.6.2)
 559          * 4. 120msec before the sleep out command (7.12.1)
 560          */
 561         msleep(120);
 562
 563         set_sleep_mode(ddata, 0);
 564         ddata->enabled = 1;
 565
 566         /* 5msec between sleep out and the next command. (8.2.16) */
 567         usleep_range(5000, 10000);
 568         set_display_state(ddata, 1);
 569         set_cabc_mode(ddata, ddata->cabc_mode);
 570
 571         mutex_unlock(&ddata->mutex);
 572
 573         return acx565akm_bl_update_status(ddata->bl_dev);
 574 }
 575
 576 static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
 577 {
 578         struct panel_drv_data *ddata = to_panel_data(dssdev);
 579         struct omap_dss_device *in = ddata->in;
 580
 581         dev_dbg(dssdev->dev, "%s\n", __func__);
 582
 583         if (!ddata->enabled)
 584                 return;
 585
 586         set_display_state(ddata, 0);
 587         set_sleep_mode(ddata, 1);
 588         ddata->enabled = 0;
 589         /*
 590          * We have to provide PCLK,HS,VS signals for 2 frames (worst case
 591          * ~50msec) after sending the sleep in command and asserting the
 592          * reset signal. We probably could assert the reset w/o the delay
 593          * but we still delay to avoid possible artifacts. (7.6.1)
 594          */
 595         msleep(50);
 596
 597         if (gpio_is_valid(ddata->reset_gpio))
 598                 gpio_set_value(ddata->reset_gpio, 0);
 599
 600         /* FIXME need to tweak this delay */
 601         msleep(100);
 602
 603         in->ops.sdi->disable(in);
 604 }
 605
 606 static int acx565akm_enable(struct omap_dss_device *dssdev)
 607 {
 608         struct panel_drv_data *ddata = to_panel_data(dssdev);
 609         int r;
 610
 611         dev_dbg(dssdev->dev, "%s\n", __func__);
 612
 613         if (!omapdss_device_is_connected(dssdev))
 614                 return -ENODEV;
 615
 616         if (omapdss_device_is_enabled(dssdev))
 617                 return 0;
 618
 619         r = acx565akm_panel_power_on(dssdev);
 620         if (r)
 621                 return r;
 622
 623         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 624
 625         return 0;
 626 }
 627
 628 static void acx565akm_disable(struct omap_dss_device *dssdev)
 629 {
 630         struct panel_drv_data *ddata = to_panel_data(dssdev);
 631
 632         dev_dbg(dssdev->dev, "%s\n", __func__);
 633
 634         if (!omapdss_device_is_enabled(dssdev))
 635                 return;
 636
 637         mutex_lock(&ddata->mutex);
 638         acx565akm_panel_power_off(dssdev);
 639         mutex_unlock(&ddata->mutex);
 640
 641         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 642 }
 643
 644 static void acx565akm_set_timings(struct omap_dss_device *dssdev,
 645                 struct omap_video_timings *timings)
 646 {
 647         struct panel_drv_data *ddata = to_panel_data(dssdev);
 648         struct omap_dss_device *in = ddata->in;
 649
 650         ddata->videomode = *timings;
 651         dssdev->panel.timings = *timings;
 652
 653         in->ops.sdi->set_timings(in, timings);
 654 }
 655
 656 static void acx565akm_get_timings(struct omap_dss_device *dssdev,
 657                 struct omap_video_timings *timings)
 658 {
 659         struct panel_drv_data *ddata = to_panel_data(dssdev);
 660
 661         *timings = ddata->videomode;
 662 }
 663
 664 static int acx565akm_check_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         return in->ops.sdi->check_timings(in, timings);
 671 }
 672
 673 static struct omap_dss_driver acx565akm_ops = {
 674         .connect        = acx565akm_connect,
 675         .disconnect     = acx565akm_disconnect,
 676
 677         .enable         = acx565akm_enable,
 678         .disable        = acx565akm_disable,
 679
 680         .set_timings    = acx565akm_set_timings,
 681         .get_timings    = acx565akm_get_timings,
 682         .check_timings  = acx565akm_check_timings,
 683
 684         .get_resolution = omapdss_default_get_resolution,
 685 };
 686
 687 static int acx565akm_probe_pdata(struct spi_device *spi)
 688 {
 689         const struct panel_acx565akm_platform_data *pdata;
 690         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 691         struct omap_dss_device *dssdev, *in;
 692
 693         pdata = dev_get_platdata(&spi->dev);
 694
 695         ddata->reset_gpio = pdata->reset_gpio;
 696
 697         in = omap_dss_find_output(pdata->source);
 698         if (in == NULL) {
 699                 dev_err(&spi->dev, "failed to find video source '%s'\n",
 700                                 pdata->source);
 701                 return -EPROBE_DEFER;
 702         }
 703         ddata->in = in;
 704
 705         ddata->datapairs = pdata->datapairs;
 706
 707         dssdev = &ddata->dssdev;
 708         dssdev->name = pdata->name;
 709
 710         return 0;
 711 }
 712
 713 static int acx565akm_probe(struct spi_device *spi)
 714 {
 715         struct panel_drv_data *ddata;
 716         struct omap_dss_device *dssdev;
 717         struct backlight_device *bldev;
 718         int max_brightness, brightness;
 719         struct backlight_properties props;
 720         int r;
 721
 722         dev_dbg(&spi->dev, "%s\n", __func__);
 723
 724         spi->mode = SPI_MODE_3;
 725
 726         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 727         if (ddata == NULL)
 728                 return -ENOMEM;
 729
 730         dev_set_drvdata(&spi->dev, ddata);
 731
 732         ddata->spi = spi;
 733
 734         mutex_init(&ddata->mutex);
 735
 736         if (dev_get_platdata(&spi->dev)) {
 737                 r = acx565akm_probe_pdata(spi);
 738                 if (r)
 739                         return r;
 740         } else {
 741                 return -ENODEV;
 742         }
 743
 744         if (gpio_is_valid(ddata->reset_gpio)) {
 745                 r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
 746                                 GPIOF_OUT_INIT_LOW, "lcd reset");
 747                 if (r)
 748                         goto err_gpio;
 749         }
 750
 751         if (gpio_is_valid(ddata->reset_gpio))
 752                 gpio_set_value(ddata->reset_gpio, 1);
 753
 754         /*
 755          * After reset we have to wait 5 msec before the first
 756          * command can be sent.
 757          */
 758         usleep_range(5000, 10000);
 759
 760         ddata->enabled = panel_enabled(ddata);
 761
 762         r = panel_detect(ddata);
 763
 764         if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
 765                 gpio_set_value(ddata->reset_gpio, 0);
 766
 767         if (r) {
 768                 dev_err(&spi->dev, "%s panel detect error\n", __func__);
 769                 goto err_detect;
 770         }
 771
 772         memset(&props, 0, sizeof(props));
 773         props.fb_blank = FB_BLANK_UNBLANK;
 774         props.power = FB_BLANK_UNBLANK;
 775         props.type = BACKLIGHT_RAW;
 776
 777         bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
 778                         ddata, &acx565akm_bl_ops, &props);
 779         ddata->bl_dev = bldev;
 780         if (ddata->has_cabc) {
 781                 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
 782                 if (r) {
 783                         dev_err(&bldev->dev,
 784                                 "%s failed to create sysfs files\n", __func__);
 785                         goto err_sysfs;
 786                 }
 787                 ddata->cabc_mode = get_hw_cabc_mode(ddata);
 788         }
 789
 790         max_brightness = 255;
 791
 792         if (ddata->has_bc)
 793                 brightness = acx565akm_get_actual_brightness(ddata);
 794         else
 795                 brightness = 0;
 796
 797         bldev->props.max_brightness = max_brightness;
 798         bldev->props.brightness = brightness;
 799
 800         acx565akm_bl_update_status(bldev);
 801
 802
 803         ddata->videomode = acx565akm_panel_timings;
 804
 805         dssdev = &ddata->dssdev;
 806         dssdev->dev = &spi->dev;
 807         dssdev->driver = &acx565akm_ops;
 808         dssdev->type = OMAP_DISPLAY_TYPE_SDI;
 809         dssdev->owner = THIS_MODULE;
 810         dssdev->panel.timings = ddata->videomode;
 811
 812         r = omapdss_register_display(dssdev);
 813         if (r) {
 814                 dev_err(&spi->dev, "Failed to register panel\n");
 815                 goto err_reg;
 816         }
 817
 818         return 0;
 819
 820 err_reg:
 821         sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
 822 err_sysfs:
 823         backlight_device_unregister(bldev);
 824 err_detect:
 825 err_gpio:
 826         omap_dss_put_device(ddata->in);
 827         return r;
 828 }
 829
 830 static int acx565akm_remove(struct spi_device *spi)
 831 {
 832         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 833         struct omap_dss_device *dssdev = &ddata->dssdev;
 834         struct omap_dss_device *in = ddata->in;
 835
 836         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 837
 838         sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
 839         backlight_device_unregister(ddata->bl_dev);
 840
 841         omapdss_unregister_display(dssdev);
 842
 843         acx565akm_disable(dssdev);
 844         acx565akm_disconnect(dssdev);
 845
 846         omap_dss_put_device(in);
 847
 848         return 0;
 849 }
 850
 851 static struct spi_driver acx565akm_driver = {
 852         .driver = {
 853                 .name   = "acx565akm",
 854                 .owner  = THIS_MODULE,
 855         },
 856         .probe  = acx565akm_probe,
 857         .remove = acx565akm_remove,
 858 };
 859
 860 module_spi_driver(acx565akm_driver);
 861
 862 MODULE_AUTHOR("Nokia Corporation");
 863 MODULE_DESCRIPTION("acx565akm LCD Driver");
 864 MODULE_LICENSE("GPL");