drivers/video/omap2/displays/panel-acx565akm.c

   1 /*
   2  * Support for ACX565AKM LCD Panel used on Nokia N900
   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
  33 #include <video/omapdss.h>
  34
  35 #define MIPID_CMD_READ_DISP_ID          0x04
  36 #define MIPID_CMD_READ_RED              0x06
  37 #define MIPID_CMD_READ_GREEN            0x07
  38 #define MIPID_CMD_READ_BLUE             0x08
  39 #define MIPID_CMD_READ_DISP_STATUS      0x09
  40 #define MIPID_CMD_RDDSDR                0x0F
  41 #define MIPID_CMD_SLEEP_IN              0x10
  42 #define MIPID_CMD_SLEEP_OUT             0x11
  43 #define MIPID_CMD_DISP_OFF              0x28
  44 #define MIPID_CMD_DISP_ON               0x29
  45 #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
  46 #define MIPID_CMD_READ_DISP_BRIGHTNESS  0x52
  47 #define MIPID_CMD_WRITE_CTRL_DISP       0x53
  48
  49 #define CTRL_DISP_BRIGHTNESS_CTRL_ON    (1 << 5)
  50 #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
  51 #define CTRL_DISP_BACKLIGHT_ON          (1 << 2)
  52 #define CTRL_DISP_AUTO_BRIGHTNESS_ON    (1 << 1)
  53
  54 #define MIPID_CMD_READ_CTRL_DISP        0x54
  55 #define MIPID_CMD_WRITE_CABC            0x55
  56 #define MIPID_CMD_READ_CABC             0x56
  57
  58 #define MIPID_VER_LPH8923               3
  59 #define MIPID_VER_LS041Y3               4
  60 #define MIPID_VER_L4F00311              8
  61 #define MIPID_VER_ACX565AKM             9
  62
  63 struct acx565akm_device {
  64         char            *name;
  65         int             enabled;
  66         int             model;
  67         int             revision;
  68         u8              display_id[3];
  69         unsigned        has_bc:1;
  70         unsigned        has_cabc:1;
  71         unsigned        cabc_mode;
  72         unsigned long   hw_guard_end;           /* next value of jiffies
  73                                                    when we can issue the
  74                                                    next sleep in/out command */
  75         unsigned long   hw_guard_wait;          /* max guard time in jiffies */
  76
  77         struct spi_device       *spi;
  78         struct mutex            mutex;
  79
  80         struct omap_dss_device  *dssdev;
  81         struct backlight_device *bl_dev;
  82 };
  83
  84 static struct acx565akm_device acx_dev;
  85 static int acx565akm_bl_update_status(struct backlight_device *dev);
  86
  87 /*--------------------MIPID interface-----------------------------*/
  88
  89 static void acx565akm_transfer(struct acx565akm_device *md, int cmd,
  90                               const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
  91 {
  92         struct spi_message      m;
  93         struct spi_transfer     *x, xfer[5];
  94         int                     r;
  95
  96         BUG_ON(md->spi == NULL);
  97
  98         spi_message_init(&m);
  99
 100         memset(xfer, 0, sizeof(xfer));
 101         x = &xfer[0];
 102
 103         cmd &=  0xff;
 104         x->tx_buf = &cmd;
 105         x->bits_per_word = 9;
 106         x->len = 2;
 107
 108         if (rlen > 1 && wlen == 0) {
 109                 /*
 110                  * Between the command and the response data there is a
 111                  * dummy clock cycle. Add an extra bit after the command
 112                  * word to account for this.
 113                  */
 114                 x->bits_per_word = 10;
 115                 cmd <<= 1;
 116         }
 117         spi_message_add_tail(x, &m);
 118
 119         if (wlen) {
 120                 x++;
 121                 x->tx_buf = wbuf;
 122                 x->len = wlen;
 123                 x->bits_per_word = 9;
 124                 spi_message_add_tail(x, &m);
 125         }
 126
 127         if (rlen) {
 128                 x++;
 129                 x->rx_buf       = rbuf;
 130                 x->len          = rlen;
 131                 spi_message_add_tail(x, &m);
 132         }
 133
 134         r = spi_sync(md->spi, &m);
 135         if (r < 0)
 136                 dev_dbg(&md->spi->dev, "spi_sync %d\n", r);
 137 }
 138
 139 static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd)
 140 {
 141         acx565akm_transfer(md, cmd, NULL, 0, NULL, 0);
 142 }
 143
 144 static inline void acx565akm_write(struct acx565akm_device *md,
 145                                int reg, const u8 *buf, int len)
 146 {
 147         acx565akm_transfer(md, reg, buf, len, NULL, 0);
 148 }
 149
 150 static inline void acx565akm_read(struct acx565akm_device *md,
 151                               int reg, u8 *buf, int len)
 152 {
 153         acx565akm_transfer(md, reg, NULL, 0, buf, len);
 154 }
 155
 156 static void hw_guard_start(struct acx565akm_device *md, int guard_msec)
 157 {
 158         md->hw_guard_wait = msecs_to_jiffies(guard_msec);
 159         md->hw_guard_end = jiffies + md->hw_guard_wait;
 160 }
 161
 162 static void hw_guard_wait(struct acx565akm_device *md)
 163 {
 164         unsigned long wait = md->hw_guard_end - jiffies;
 165
 166         if ((long)wait > 0 && wait <= md->hw_guard_wait) {
 167                 set_current_state(TASK_UNINTERRUPTIBLE);
 168                 schedule_timeout(wait);
 169         }
 170 }
 171
 172 /*----------------------MIPID wrappers----------------------------*/
 173
 174 static void set_sleep_mode(struct acx565akm_device *md, int on)
 175 {
 176         int cmd;
 177
 178         if (on)
 179                 cmd = MIPID_CMD_SLEEP_IN;
 180         else
 181                 cmd = MIPID_CMD_SLEEP_OUT;
 182         /*
 183          * We have to keep 120msec between sleep in/out commands.
 184          * (8.2.15, 8.2.16).
 185          */
 186         hw_guard_wait(md);
 187         acx565akm_cmd(md, cmd);
 188         hw_guard_start(md, 120);
 189 }
 190
 191 static void set_display_state(struct acx565akm_device *md, int enabled)
 192 {
 193         int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
 194
 195         acx565akm_cmd(md, cmd);
 196 }
 197
 198 static int panel_enabled(struct acx565akm_device *md)
 199 {
 200         u32 disp_status;
 201         int enabled;
 202
 203         acx565akm_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4);
 204         disp_status = __be32_to_cpu(disp_status);
 205         enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
 206         dev_dbg(&md->spi->dev,
 207                 "LCD panel %senabled by bootloader (status 0x%04x)\n",
 208                 enabled ? "" : "not ", disp_status);
 209         return enabled;
 210 }
 211
 212 static int panel_detect(struct acx565akm_device *md)
 213 {
 214         acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3);
 215         dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n",
 216                 md->display_id[0], md->display_id[1], md->display_id[2]);
 217
 218         switch (md->display_id[0]) {
 219         case 0x10:
 220                 md->model = MIPID_VER_ACX565AKM;
 221                 md->name = "acx565akm";
 222                 md->has_bc = 1;
 223                 md->has_cabc = 1;
 224                 break;
 225         case 0x29:
 226                 md->model = MIPID_VER_L4F00311;
 227                 md->name = "l4f00311";
 228                 break;
 229         case 0x45:
 230                 md->model = MIPID_VER_LPH8923;
 231                 md->name = "lph8923";
 232                 break;
 233         case 0x83:
 234                 md->model = MIPID_VER_LS041Y3;
 235                 md->name = "ls041y3";
 236                 break;
 237         default:
 238                 md->name = "unknown";
 239                 dev_err(&md->spi->dev, "invalid display ID\n");
 240                 return -ENODEV;
 241         }
 242
 243         md->revision = md->display_id[1];
 244
 245         dev_info(&md->spi->dev, "omapfb: %s rev %02x LCD detected\n",
 246                         md->name, md->revision);
 247
 248         return 0;
 249 }
 250
 251 /*----------------------Backlight Control-------------------------*/
 252
 253 static void enable_backlight_ctrl(struct acx565akm_device *md, int enable)
 254 {
 255         u16 ctrl;
 256
 257         acx565akm_read(md, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
 258         if (enable) {
 259                 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
 260                         CTRL_DISP_BACKLIGHT_ON;
 261         } else {
 262                 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
 263                           CTRL_DISP_BACKLIGHT_ON);
 264         }
 265
 266         ctrl |= 1 << 8;
 267         acx565akm_write(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
 268 }
 269
 270 static void set_cabc_mode(struct acx565akm_device *md, unsigned mode)
 271 {
 272         u16 cabc_ctrl;
 273
 274         md->cabc_mode = mode;
 275         if (!md->enabled)
 276                 return;
 277         cabc_ctrl = 0;
 278         acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
 279         cabc_ctrl &= ~3;
 280         cabc_ctrl |= (1 << 8) | (mode & 3);
 281         acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
 282 }
 283
 284 static unsigned get_cabc_mode(struct acx565akm_device *md)
 285 {
 286         return md->cabc_mode;
 287 }
 288
 289 static unsigned get_hw_cabc_mode(struct acx565akm_device *md)
 290 {
 291         u8 cabc_ctrl;
 292
 293         acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
 294         return cabc_ctrl & 3;
 295 }
 296
 297 static void acx565akm_set_brightness(struct acx565akm_device *md, int level)
 298 {
 299         int bv;
 300
 301         bv = level | (1 << 8);
 302         acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
 303
 304         if (level)
 305                 enable_backlight_ctrl(md, 1);
 306         else
 307                 enable_backlight_ctrl(md, 0);
 308 }
 309
 310 static int acx565akm_get_actual_brightness(struct acx565akm_device *md)
 311 {
 312         u8 bv;
 313
 314         acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
 315
 316         return bv;
 317 }
 318
 319
 320 static int acx565akm_bl_update_status(struct backlight_device *dev)
 321 {
 322         struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
 323         int r;
 324         int level;
 325
 326         dev_dbg(&md->spi->dev, "%s\n", __func__);
 327
 328         mutex_lock(&md->mutex);
 329
 330         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 331                         dev->props.power == FB_BLANK_UNBLANK)
 332                 level = dev->props.brightness;
 333         else
 334                 level = 0;
 335
 336         r = 0;
 337         if (md->has_bc)
 338                 acx565akm_set_brightness(md, level);
 339         else if (md->dssdev->set_backlight)
 340                 r = md->dssdev->set_backlight(md->dssdev, level);
 341         else
 342                 r = -ENODEV;
 343
 344         mutex_unlock(&md->mutex);
 345
 346         return r;
 347 }
 348
 349 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
 350 {
 351         struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
 352
 353         dev_dbg(&dev->dev, "%s\n", __func__);
 354
 355         if (!md->has_bc && md->dssdev->set_backlight == NULL)
 356                 return -ENODEV;
 357
 358         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 359                         dev->props.power == FB_BLANK_UNBLANK) {
 360                 if (md->has_bc)
 361                         return acx565akm_get_actual_brightness(md);
 362                 else
 363                         return dev->props.brightness;
 364         }
 365
 366         return 0;
 367 }
 368
 369 static const struct backlight_ops acx565akm_bl_ops = {
 370         .get_brightness = acx565akm_bl_get_intensity,
 371         .update_status  = acx565akm_bl_update_status,
 372 };
 373
 374 /*--------------------Auto Brightness control via Sysfs---------------------*/
 375
 376 static const char *cabc_modes[] = {
 377         "off",          /* always used when CABC is not supported */
 378         "ui",
 379         "still-image",
 380         "moving-image",
 381 };
 382
 383 static ssize_t show_cabc_mode(struct device *dev,
 384                 struct device_attribute *attr,
 385                 char *buf)
 386 {
 387         struct acx565akm_device *md = dev_get_drvdata(dev);
 388         const char *mode_str;
 389         int mode;
 390         int len;
 391
 392         if (!md->has_cabc)
 393                 mode = 0;
 394         else
 395                 mode = get_cabc_mode(md);
 396         mode_str = "unknown";
 397         if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
 398                 mode_str = cabc_modes[mode];
 399         len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
 400
 401         return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
 402 }
 403
 404 static ssize_t store_cabc_mode(struct device *dev,
 405                 struct device_attribute *attr,
 406                 const char *buf, size_t count)
 407 {
 408         struct acx565akm_device *md = dev_get_drvdata(dev);
 409         int i;
 410
 411         for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
 412                 const char *mode_str = cabc_modes[i];
 413                 int cmp_len = strlen(mode_str);
 414
 415                 if (count > 0 && buf[count - 1] == '\n')
 416                         count--;
 417                 if (count != cmp_len)
 418                         continue;
 419
 420                 if (strncmp(buf, mode_str, cmp_len) == 0)
 421                         break;
 422         }
 423
 424         if (i == ARRAY_SIZE(cabc_modes))
 425                 return -EINVAL;
 426
 427         if (!md->has_cabc && i != 0)
 428                 return -EINVAL;
 429
 430         mutex_lock(&md->mutex);
 431         set_cabc_mode(md, i);
 432         mutex_unlock(&md->mutex);
 433
 434         return count;
 435 }
 436
 437 static ssize_t show_cabc_available_modes(struct device *dev,
 438                 struct device_attribute *attr,
 439                 char *buf)
 440 {
 441         struct acx565akm_device *md = dev_get_drvdata(dev);
 442         int len;
 443         int i;
 444
 445         if (!md->has_cabc)
 446                 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
 447
 448         for (i = 0, len = 0;
 449              len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
 450                 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
 451                         i ? " " : "", cabc_modes[i],
 452                         i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
 453
 454         return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
 455 }
 456
 457 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
 458                 show_cabc_mode, store_cabc_mode);
 459 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
 460                 show_cabc_available_modes, NULL);
 461
 462 static struct attribute *bldev_attrs[] = {
 463         &dev_attr_cabc_mode.attr,
 464         &dev_attr_cabc_available_modes.attr,
 465         NULL,
 466 };
 467
 468 static struct attribute_group bldev_attr_group = {
 469         .attrs = bldev_attrs,
 470 };
 471
 472
 473 /*---------------------------ACX Panel----------------------------*/
 474
 475 static int acx_get_recommended_bpp(struct omap_dss_device *dssdev)
 476 {
 477         return 16;
 478 }
 479
 480 static struct omap_video_timings acx_panel_timings = {
 481         .x_res          = 800,
 482         .y_res          = 480,
 483         .pixel_clock    = 24000,
 484         .hfp            = 28,
 485         .hsw            = 4,
 486         .hbp            = 24,
 487         .vfp            = 3,
 488         .vsw            = 3,
 489         .vbp            = 4,
 490 };
 491
 492 static int acx_panel_probe(struct omap_dss_device *dssdev)
 493 {
 494         int r;
 495         struct acx565akm_device *md = &acx_dev;
 496         struct backlight_device *bldev;
 497         int max_brightness, brightness;
 498         struct backlight_properties props;
 499
 500         dev_dbg(&dssdev->dev, "%s\n", __func__);
 501         dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
 502                                         OMAP_DSS_LCD_IHS;
 503         /* FIXME AC bias ? */
 504         dssdev->panel.timings = acx_panel_timings;
 505
 506         if (dssdev->platform_enable)
 507                 dssdev->platform_enable(dssdev);
 508         /*
 509          * After reset we have to wait 5 msec before the first
 510          * command can be sent.
 511          */
 512         msleep(5);
 513
 514         md->enabled = panel_enabled(md);
 515
 516         r = panel_detect(md);
 517         if (r) {
 518                 dev_err(&dssdev->dev, "%s panel detect error\n", __func__);
 519                 if (!md->enabled && dssdev->platform_disable)
 520                         dssdev->platform_disable(dssdev);
 521                 return r;
 522         }
 523
 524         mutex_lock(&acx_dev.mutex);
 525         acx_dev.dssdev = dssdev;
 526         mutex_unlock(&acx_dev.mutex);
 527
 528         if (!md->enabled) {
 529                 if (dssdev->platform_disable)
 530                         dssdev->platform_disable(dssdev);
 531         }
 532
 533         /*------- Backlight control --------*/
 534
 535         memset(&props, 0, sizeof(props));
 536         props.fb_blank = FB_BLANK_UNBLANK;
 537         props.power = FB_BLANK_UNBLANK;
 538         props.type = BACKLIGHT_RAW;
 539
 540         bldev = backlight_device_register("acx565akm", &md->spi->dev,
 541                         md, &acx565akm_bl_ops, &props);
 542         md->bl_dev = bldev;
 543         if (md->has_cabc) {
 544                 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
 545                 if (r) {
 546                         dev_err(&bldev->dev,
 547                                 "%s failed to create sysfs files\n", __func__);
 548                         backlight_device_unregister(bldev);
 549                         return r;
 550                 }
 551                 md->cabc_mode = get_hw_cabc_mode(md);
 552         }
 553
 554         if (md->has_bc)
 555                 max_brightness = 255;
 556         else
 557                 max_brightness = dssdev->max_backlight_level;
 558
 559         if (md->has_bc)
 560                 brightness = acx565akm_get_actual_brightness(md);
 561         else if (dssdev->get_backlight)
 562                 brightness = dssdev->get_backlight(dssdev);
 563         else
 564                 brightness = 0;
 565
 566         bldev->props.max_brightness = max_brightness;
 567         bldev->props.brightness = brightness;
 568
 569         acx565akm_bl_update_status(bldev);
 570         return 0;
 571 }
 572
 573 static void acx_panel_remove(struct omap_dss_device *dssdev)
 574 {
 575         struct acx565akm_device *md = &acx_dev;
 576
 577         dev_dbg(&dssdev->dev, "%s\n", __func__);
 578         sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group);
 579         backlight_device_unregister(md->bl_dev);
 580         mutex_lock(&acx_dev.mutex);
 581         acx_dev.dssdev = NULL;
 582         mutex_unlock(&acx_dev.mutex);
 583 }
 584
 585 static int acx_panel_power_on(struct omap_dss_device *dssdev)
 586 {
 587         struct acx565akm_device *md = &acx_dev;
 588         int r;
 589
 590         dev_dbg(&dssdev->dev, "%s\n", __func__);
 591
 592         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 593                 return 0;
 594
 595         mutex_lock(&md->mutex);
 596
 597         r = omapdss_sdi_display_enable(dssdev);
 598         if (r) {
 599                 pr_err("%s sdi enable failed\n", __func__);
 600                 goto fail_unlock;
 601         }
 602
 603         /*FIXME tweak me */
 604         msleep(50);
 605
 606         if (dssdev->platform_enable) {
 607                 r = dssdev->platform_enable(dssdev);
 608                 if (r)
 609                         goto fail;
 610         }
 611
 612         if (md->enabled) {
 613                 dev_dbg(&md->spi->dev, "panel already enabled\n");
 614                 mutex_unlock(&md->mutex);
 615                 return 0;
 616         }
 617
 618         /*
 619          * We have to meet all the following delay requirements:
 620          * 1. tRW: reset pulse width 10usec (7.12.1)
 621          * 2. tRT: reset cancel time 5msec (7.12.1)
 622          * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
 623          *    case (7.6.2)
 624          * 4. 120msec before the sleep out command (7.12.1)
 625          */
 626         msleep(120);
 627
 628         set_sleep_mode(md, 0);
 629         md->enabled = 1;
 630
 631         /* 5msec between sleep out and the next command. (8.2.16) */
 632         msleep(5);
 633         set_display_state(md, 1);
 634         set_cabc_mode(md, md->cabc_mode);
 635
 636         mutex_unlock(&md->mutex);
 637
 638         return acx565akm_bl_update_status(md->bl_dev);
 639 fail:
 640         omapdss_sdi_display_disable(dssdev);
 641 fail_unlock:
 642         mutex_unlock(&md->mutex);
 643         return r;
 644 }
 645
 646 static void acx_panel_power_off(struct omap_dss_device *dssdev)
 647 {
 648         struct acx565akm_device *md = &acx_dev;
 649
 650         dev_dbg(&dssdev->dev, "%s\n", __func__);
 651
 652         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 653                 return;
 654
 655         mutex_lock(&md->mutex);
 656
 657         if (!md->enabled) {
 658                 mutex_unlock(&md->mutex);
 659                 return;
 660         }
 661         set_display_state(md, 0);
 662         set_sleep_mode(md, 1);
 663         md->enabled = 0;
 664         /*
 665          * We have to provide PCLK,HS,VS signals for 2 frames (worst case
 666          * ~50msec) after sending the sleep in command and asserting the
 667          * reset signal. We probably could assert the reset w/o the delay
 668          * but we still delay to avoid possible artifacts. (7.6.1)
 669          */
 670         msleep(50);
 671
 672         if (dssdev->platform_disable)
 673                 dssdev->platform_disable(dssdev);
 674
 675         /* FIXME need to tweak this delay */
 676         msleep(100);
 677
 678         omapdss_sdi_display_disable(dssdev);
 679
 680         mutex_unlock(&md->mutex);
 681 }
 682
 683 static int acx_panel_enable(struct omap_dss_device *dssdev)
 684 {
 685         int r;
 686
 687         dev_dbg(&dssdev->dev, "%s\n", __func__);
 688         r = acx_panel_power_on(dssdev);
 689
 690         if (r)
 691                 return r;
 692
 693         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 694         return 0;
 695 }
 696
 697 static void acx_panel_disable(struct omap_dss_device *dssdev)
 698 {
 699         dev_dbg(&dssdev->dev, "%s\n", __func__);
 700         acx_panel_power_off(dssdev);
 701         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 702 }
 703
 704 static int acx_panel_suspend(struct omap_dss_device *dssdev)
 705 {
 706         dev_dbg(&dssdev->dev, "%s\n", __func__);
 707         acx_panel_power_off(dssdev);
 708         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
 709         return 0;
 710 }
 711
 712 static int acx_panel_resume(struct omap_dss_device *dssdev)
 713 {
 714         int r;
 715
 716         dev_dbg(&dssdev->dev, "%s\n", __func__);
 717         r = acx_panel_power_on(dssdev);
 718         if (r)
 719                 return r;
 720
 721         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 722         return 0;
 723 }
 724
 725 static void acx_panel_set_timings(struct omap_dss_device *dssdev,
 726                 struct omap_video_timings *timings)
 727 {
 728         int r;
 729
 730         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 731                 omapdss_sdi_display_disable(dssdev);
 732
 733         dssdev->panel.timings = *timings;
 734
 735         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
 736                 r = omapdss_sdi_display_enable(dssdev);
 737                 if (r)
 738                         dev_err(&dssdev->dev, "%s enable failed\n", __func__);
 739         }
 740 }
 741
 742 static int acx_panel_check_timings(struct omap_dss_device *dssdev,
 743                 struct omap_video_timings *timings)
 744 {
 745         return 0;
 746 }
 747
 748
 749 static struct omap_dss_driver acx_panel_driver = {
 750         .probe          = acx_panel_probe,
 751         .remove         = acx_panel_remove,
 752
 753         .enable         = acx_panel_enable,
 754         .disable        = acx_panel_disable,
 755         .suspend        = acx_panel_suspend,
 756         .resume         = acx_panel_resume,
 757
 758         .set_timings    = acx_panel_set_timings,
 759         .check_timings  = acx_panel_check_timings,
 760
 761         .get_recommended_bpp = acx_get_recommended_bpp,
 762
 763         .driver         = {
 764                 .name   = "panel-acx565akm",
 765                 .owner  = THIS_MODULE,
 766         },
 767 };
 768
 769 /*--------------------SPI probe-------------------------*/
 770
 771 static int acx565akm_spi_probe(struct spi_device *spi)
 772 {
 773         struct acx565akm_device *md = &acx_dev;
 774
 775         dev_dbg(&spi->dev, "%s\n", __func__);
 776
 777         spi->mode = SPI_MODE_3;
 778         md->spi = spi;
 779         mutex_init(&md->mutex);
 780         dev_set_drvdata(&spi->dev, md);
 781
 782         omap_dss_register_driver(&acx_panel_driver);
 783
 784         return 0;
 785 }
 786
 787 static int acx565akm_spi_remove(struct spi_device *spi)
 788 {
 789         struct acx565akm_device *md = dev_get_drvdata(&spi->dev);
 790
 791         dev_dbg(&md->spi->dev, "%s\n", __func__);
 792         omap_dss_unregister_driver(&acx_panel_driver);
 793
 794         return 0;
 795 }
 796
 797 static struct spi_driver acx565akm_spi_driver = {
 798         .driver = {
 799                 .name   = "acx565akm",
 800                 .owner  = THIS_MODULE,
 801         },
 802         .probe  = acx565akm_spi_probe,
 803         .remove = __devexit_p(acx565akm_spi_remove),
 804 };
 805
 806 module_spi_driver(acx565akm_spi_driver);
 807
 808 MODULE_AUTHOR("Nokia Corporation");
 809 MODULE_DESCRIPTION("acx565akm LCD Driver");
 810 MODULE_LICENSE("GPL");