drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c

   1 /*
   2  * Generic DSI Command Mode panel driver
   3  *
   4  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
   5  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11
  12 /* #define DEBUG */
  13
  14 #include <linux/backlight.h>
  15 #include <linux/delay.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/jiffies.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/sched/signal.h>
  22 #include <linux/slab.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/of_device.h>
  25 #include <linux/regulator/consumer.h>
  26
  27 #include <video/mipi_display.h>
  28 #include <video/of_display_timing.h>
  29
  30 #include "../dss/omapdss.h"
  31
  32 /* DSI Virtual channel. Hardcoded for now. */
  33 #define TCH 0
  34
  35 #define DCS_READ_NUM_ERRORS     0x05
  36 #define DCS_BRIGHTNESS          0x51
  37 #define DCS_CTRL_DISPLAY        0x53
  38 #define DCS_GET_ID1             0xda
  39 #define DCS_GET_ID2             0xdb
  40 #define DCS_GET_ID3             0xdc
  41
  42 struct panel_drv_data {
  43         struct omap_dss_device dssdev;
  44
  45         struct videomode vm;
  46
  47         struct platform_device *pdev;
  48
  49         struct mutex lock;
  50
  51         struct backlight_device *bldev;
  52         struct backlight_device *extbldev;
  53
  54         unsigned long   hw_guard_end;   /* next value of jiffies when we can
  55                                          * issue the next sleep in/out command
  56                                          */
  57         unsigned long   hw_guard_wait;  /* max guard time in jiffies */
  58
  59         /* panel HW configuration from DT or platform data */
  60         struct gpio_desc *reset_gpio;
  61         struct gpio_desc *ext_te_gpio;
  62
  63         struct regulator *vpnl;
  64         struct regulator *vddi;
  65
  66         bool use_dsi_backlight;
  67
  68         int width_mm;
  69         int height_mm;
  70
  71         struct omap_dsi_pin_config pin_config;
  72
  73         /* runtime variables */
  74         bool enabled;
  75
  76         bool te_enabled;
  77
  78         atomic_t do_update;
  79         int channel;
  80
  81         struct delayed_work te_timeout_work;
  82
  83         bool intro_printed;
  84
  85         struct workqueue_struct *workqueue;
  86
  87         bool ulps_enabled;
  88         unsigned int ulps_timeout;
  89         struct delayed_work ulps_work;
  90 };
  91
  92 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
  93
  94 static irqreturn_t dsicm_te_isr(int irq, void *data);
  95 static void dsicm_te_timeout_work_callback(struct work_struct *work);
  96 static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable);
  97
  98 static int dsicm_panel_reset(struct panel_drv_data *ddata);
  99
 100 static void dsicm_ulps_work(struct work_struct *work);
 101
 102 static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable)
 103 {
 104         struct backlight_device *backlight;
 105
 106         if (ddata->bldev)
 107                 backlight = ddata->bldev;
 108         else if (ddata->extbldev)
 109                 backlight = ddata->extbldev;
 110         else
 111                 return;
 112
 113         if (enable) {
 114                 backlight->props.fb_blank = FB_BLANK_UNBLANK;
 115                 backlight->props.state = ~(BL_CORE_FBBLANK | BL_CORE_SUSPENDED);
 116                 backlight->props.power = FB_BLANK_UNBLANK;
 117         } else {
 118                 backlight->props.fb_blank = FB_BLANK_NORMAL;
 119                 backlight->props.power = FB_BLANK_POWERDOWN;
 120                 backlight->props.state |= BL_CORE_FBBLANK | BL_CORE_SUSPENDED;
 121         }
 122
 123         backlight_update_status(backlight);
 124 }
 125
 126 static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
 127 {
 128         ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
 129         ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
 130 }
 131
 132 static void hw_guard_wait(struct panel_drv_data *ddata)
 133 {
 134         unsigned long wait = ddata->hw_guard_end - jiffies;
 135
 136         if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
 137                 set_current_state(TASK_UNINTERRUPTIBLE);
 138                 schedule_timeout(wait);
 139         }
 140 }
 141
 142 static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data)
 143 {
 144         struct omap_dss_device *src = ddata->dssdev.src;
 145         int r;
 146         u8 buf[1];
 147
 148         r = src->ops->dsi.dcs_read(src, ddata->channel, dcs_cmd, buf, 1);
 149
 150         if (r < 0)
 151                 return r;
 152
 153         *data = buf[0];
 154
 155         return 0;
 156 }
 157
 158 static int dsicm_dcs_write_0(struct panel_drv_data *ddata, u8 dcs_cmd)
 159 {
 160         struct omap_dss_device *src = ddata->dssdev.src;
 161
 162         return src->ops->dsi.dcs_write(src, ddata->channel, &dcs_cmd, 1);
 163 }
 164
 165 static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param)
 166 {
 167         struct omap_dss_device *src = ddata->dssdev.src;
 168         u8 buf[2] = { dcs_cmd, param };
 169
 170         return src->ops->dsi.dcs_write(src, ddata->channel, buf, 2);
 171 }
 172
 173 static int dsicm_sleep_in(struct panel_drv_data *ddata)
 174
 175 {
 176         struct omap_dss_device *src = ddata->dssdev.src;
 177         u8 cmd;
 178         int r;
 179
 180         hw_guard_wait(ddata);
 181
 182         cmd = MIPI_DCS_ENTER_SLEEP_MODE;
 183         r = src->ops->dsi.dcs_write_nosync(src, ddata->channel, &cmd, 1);
 184         if (r)
 185                 return r;
 186
 187         hw_guard_start(ddata, 120);
 188
 189         usleep_range(5000, 10000);
 190
 191         return 0;
 192 }
 193
 194 static int dsicm_sleep_out(struct panel_drv_data *ddata)
 195 {
 196         int r;
 197
 198         hw_guard_wait(ddata);
 199
 200         r = dsicm_dcs_write_0(ddata, MIPI_DCS_EXIT_SLEEP_MODE);
 201         if (r)
 202                 return r;
 203
 204         hw_guard_start(ddata, 120);
 205
 206         usleep_range(5000, 10000);
 207
 208         return 0;
 209 }
 210
 211 static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3)
 212 {
 213         int r;
 214
 215         r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1);
 216         if (r)
 217                 return r;
 218         r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2);
 219         if (r)
 220                 return r;
 221         r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3);
 222         if (r)
 223                 return r;
 224
 225         return 0;
 226 }
 227
 228 static int dsicm_set_update_window(struct panel_drv_data *ddata,
 229                 u16 x, u16 y, u16 w, u16 h)
 230 {
 231         struct omap_dss_device *src = ddata->dssdev.src;
 232         int r;
 233         u16 x1 = x;
 234         u16 x2 = x + w - 1;
 235         u16 y1 = y;
 236         u16 y2 = y + h - 1;
 237
 238         u8 buf[5];
 239         buf[0] = MIPI_DCS_SET_COLUMN_ADDRESS;
 240         buf[1] = (x1 >> 8) & 0xff;
 241         buf[2] = (x1 >> 0) & 0xff;
 242         buf[3] = (x2 >> 8) & 0xff;
 243         buf[4] = (x2 >> 0) & 0xff;
 244
 245         r = src->ops->dsi.dcs_write_nosync(src, ddata->channel, buf, sizeof(buf));
 246         if (r)
 247                 return r;
 248
 249         buf[0] = MIPI_DCS_SET_PAGE_ADDRESS;
 250         buf[1] = (y1 >> 8) & 0xff;
 251         buf[2] = (y1 >> 0) & 0xff;
 252         buf[3] = (y2 >> 8) & 0xff;
 253         buf[4] = (y2 >> 0) & 0xff;
 254
 255         r = src->ops->dsi.dcs_write_nosync(src, ddata->channel, buf, sizeof(buf));
 256         if (r)
 257                 return r;
 258
 259         src->ops->dsi.bta_sync(src, ddata->channel);
 260
 261         return r;
 262 }
 263
 264 static void dsicm_queue_ulps_work(struct panel_drv_data *ddata)
 265 {
 266         if (ddata->ulps_timeout > 0)
 267                 queue_delayed_work(ddata->workqueue, &ddata->ulps_work,
 268                                 msecs_to_jiffies(ddata->ulps_timeout));
 269 }
 270
 271 static void dsicm_cancel_ulps_work(struct panel_drv_data *ddata)
 272 {
 273         cancel_delayed_work(&ddata->ulps_work);
 274 }
 275
 276 static int dsicm_enter_ulps(struct panel_drv_data *ddata)
 277 {
 278         struct omap_dss_device *src = ddata->dssdev.src;
 279         int r;
 280
 281         if (ddata->ulps_enabled)
 282                 return 0;
 283
 284         dsicm_cancel_ulps_work(ddata);
 285
 286         r = _dsicm_enable_te(ddata, false);
 287         if (r)
 288                 goto err;
 289
 290         if (ddata->ext_te_gpio)
 291                 disable_irq(gpiod_to_irq(ddata->ext_te_gpio));
 292
 293         src->ops->dsi.disable(src, false, true);
 294
 295         ddata->ulps_enabled = true;
 296
 297         return 0;
 298
 299 err:
 300         dev_err(&ddata->pdev->dev, "enter ULPS failed");
 301         dsicm_panel_reset(ddata);
 302
 303         ddata->ulps_enabled = false;
 304
 305         dsicm_queue_ulps_work(ddata);
 306
 307         return r;
 308 }
 309
 310 static int dsicm_exit_ulps(struct panel_drv_data *ddata)
 311 {
 312         struct omap_dss_device *src = ddata->dssdev.src;
 313         int r;
 314
 315         if (!ddata->ulps_enabled)
 316                 return 0;
 317
 318         r = src->ops->enable(src);
 319         if (r) {
 320                 dev_err(&ddata->pdev->dev, "failed to enable DSI\n");
 321                 goto err1;
 322         }
 323
 324         src->ops->dsi.enable_hs(src, ddata->channel, true);
 325
 326         r = _dsicm_enable_te(ddata, true);
 327         if (r) {
 328                 dev_err(&ddata->pdev->dev, "failed to re-enable TE");
 329                 goto err2;
 330         }
 331
 332         if (ddata->ext_te_gpio)
 333                 enable_irq(gpiod_to_irq(ddata->ext_te_gpio));
 334
 335         dsicm_queue_ulps_work(ddata);
 336
 337         ddata->ulps_enabled = false;
 338
 339         return 0;
 340
 341 err2:
 342         dev_err(&ddata->pdev->dev, "failed to exit ULPS");
 343
 344         r = dsicm_panel_reset(ddata);
 345         if (!r) {
 346                 if (ddata->ext_te_gpio)
 347                         enable_irq(gpiod_to_irq(ddata->ext_te_gpio));
 348                 ddata->ulps_enabled = false;
 349         }
 350 err1:
 351         dsicm_queue_ulps_work(ddata);
 352
 353         return r;
 354 }
 355
 356 static int dsicm_wake_up(struct panel_drv_data *ddata)
 357 {
 358         if (ddata->ulps_enabled)
 359                 return dsicm_exit_ulps(ddata);
 360
 361         dsicm_cancel_ulps_work(ddata);
 362         dsicm_queue_ulps_work(ddata);
 363         return 0;
 364 }
 365
 366 static int dsicm_bl_update_status(struct backlight_device *dev)
 367 {
 368         struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
 369         struct omap_dss_device *src = ddata->dssdev.src;
 370         int r = 0;
 371         int level;
 372
 373         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 374                         dev->props.power == FB_BLANK_UNBLANK)
 375                 level = dev->props.brightness;
 376         else
 377                 level = 0;
 378
 379         dev_dbg(&ddata->pdev->dev, "update brightness to %d\n", level);
 380
 381         mutex_lock(&ddata->lock);
 382
 383         if (ddata->enabled) {
 384                 src->ops->dsi.bus_lock(src);
 385
 386                 r = dsicm_wake_up(ddata);
 387                 if (!r)
 388                         r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, level);
 389
 390                 src->ops->dsi.bus_unlock(src);
 391         }
 392
 393         mutex_unlock(&ddata->lock);
 394
 395         return r;
 396 }
 397
 398 static int dsicm_bl_get_intensity(struct backlight_device *dev)
 399 {
 400         if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
 401                         dev->props.power == FB_BLANK_UNBLANK)
 402                 return dev->props.brightness;
 403
 404         return 0;
 405 }
 406
 407 static const struct backlight_ops dsicm_bl_ops = {
 408         .get_brightness = dsicm_bl_get_intensity,
 409         .update_status  = dsicm_bl_update_status,
 410 };
 411
 412 static ssize_t dsicm_num_errors_show(struct device *dev,
 413                 struct device_attribute *attr, char *buf)
 414 {
 415         struct platform_device *pdev = to_platform_device(dev);
 416         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 417         struct omap_dss_device *src = ddata->dssdev.src;
 418         u8 errors = 0;
 419         int r;
 420
 421         mutex_lock(&ddata->lock);
 422
 423         if (ddata->enabled) {
 424                 src->ops->dsi.bus_lock(src);
 425
 426                 r = dsicm_wake_up(ddata);
 427                 if (!r)
 428                         r = dsicm_dcs_read_1(ddata, DCS_READ_NUM_ERRORS,
 429                                         &errors);
 430
 431                 src->ops->dsi.bus_unlock(src);
 432         } else {
 433                 r = -ENODEV;
 434         }
 435
 436         mutex_unlock(&ddata->lock);
 437
 438         if (r)
 439                 return r;
 440
 441         return snprintf(buf, PAGE_SIZE, "%d\n", errors);
 442 }
 443
 444 static ssize_t dsicm_hw_revision_show(struct device *dev,
 445                 struct device_attribute *attr, char *buf)
 446 {
 447         struct platform_device *pdev = to_platform_device(dev);
 448         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 449         struct omap_dss_device *src = ddata->dssdev.src;
 450         u8 id1, id2, id3;
 451         int r;
 452
 453         mutex_lock(&ddata->lock);
 454
 455         if (ddata->enabled) {
 456                 src->ops->dsi.bus_lock(src);
 457
 458                 r = dsicm_wake_up(ddata);
 459                 if (!r)
 460                         r = dsicm_get_id(ddata, &id1, &id2, &id3);
 461
 462                 src->ops->dsi.bus_unlock(src);
 463         } else {
 464                 r = -ENODEV;
 465         }
 466
 467         mutex_unlock(&ddata->lock);
 468
 469         if (r)
 470                 return r;
 471
 472         return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
 473 }
 474
 475 static ssize_t dsicm_store_ulps(struct device *dev,
 476                 struct device_attribute *attr,
 477                 const char *buf, size_t count)
 478 {
 479         struct platform_device *pdev = to_platform_device(dev);
 480         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 481         struct omap_dss_device *src = ddata->dssdev.src;
 482         unsigned long t;
 483         int r;
 484
 485         r = kstrtoul(buf, 0, &t);
 486         if (r)
 487                 return r;
 488
 489         mutex_lock(&ddata->lock);
 490
 491         if (ddata->enabled) {
 492                 src->ops->dsi.bus_lock(src);
 493
 494                 if (t)
 495                         r = dsicm_enter_ulps(ddata);
 496                 else
 497                         r = dsicm_wake_up(ddata);
 498
 499                 src->ops->dsi.bus_unlock(src);
 500         }
 501
 502         mutex_unlock(&ddata->lock);
 503
 504         if (r)
 505                 return r;
 506
 507         return count;
 508 }
 509
 510 static ssize_t dsicm_show_ulps(struct device *dev,
 511                 struct device_attribute *attr,
 512                 char *buf)
 513 {
 514         struct platform_device *pdev = to_platform_device(dev);
 515         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 516         unsigned int t;
 517
 518         mutex_lock(&ddata->lock);
 519         t = ddata->ulps_enabled;
 520         mutex_unlock(&ddata->lock);
 521
 522         return snprintf(buf, PAGE_SIZE, "%u\n", t);
 523 }
 524
 525 static ssize_t dsicm_store_ulps_timeout(struct device *dev,
 526                 struct device_attribute *attr,
 527                 const char *buf, size_t count)
 528 {
 529         struct platform_device *pdev = to_platform_device(dev);
 530         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 531         struct omap_dss_device *src = ddata->dssdev.src;
 532         unsigned long t;
 533         int r;
 534
 535         r = kstrtoul(buf, 0, &t);
 536         if (r)
 537                 return r;
 538
 539         mutex_lock(&ddata->lock);
 540         ddata->ulps_timeout = t;
 541
 542         if (ddata->enabled) {
 543                 /* dsicm_wake_up will restart the timer */
 544                 src->ops->dsi.bus_lock(src);
 545                 r = dsicm_wake_up(ddata);
 546                 src->ops->dsi.bus_unlock(src);
 547         }
 548
 549         mutex_unlock(&ddata->lock);
 550
 551         if (r)
 552                 return r;
 553
 554         return count;
 555 }
 556
 557 static ssize_t dsicm_show_ulps_timeout(struct device *dev,
 558                 struct device_attribute *attr,
 559                 char *buf)
 560 {
 561         struct platform_device *pdev = to_platform_device(dev);
 562         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 563         unsigned int t;
 564
 565         mutex_lock(&ddata->lock);
 566         t = ddata->ulps_timeout;
 567         mutex_unlock(&ddata->lock);
 568
 569         return snprintf(buf, PAGE_SIZE, "%u\n", t);
 570 }
 571
 572 static DEVICE_ATTR(num_dsi_errors, S_IRUGO, dsicm_num_errors_show, NULL);
 573 static DEVICE_ATTR(hw_revision, S_IRUGO, dsicm_hw_revision_show, NULL);
 574 static DEVICE_ATTR(ulps, S_IRUGO | S_IWUSR,
 575                 dsicm_show_ulps, dsicm_store_ulps);
 576 static DEVICE_ATTR(ulps_timeout, S_IRUGO | S_IWUSR,
 577                 dsicm_show_ulps_timeout, dsicm_store_ulps_timeout);
 578
 579 static struct attribute *dsicm_attrs[] = {
 580         &dev_attr_num_dsi_errors.attr,
 581         &dev_attr_hw_revision.attr,
 582         &dev_attr_ulps.attr,
 583         &dev_attr_ulps_timeout.attr,
 584         NULL,
 585 };
 586
 587 static const struct attribute_group dsicm_attr_group = {
 588         .attrs = dsicm_attrs,
 589 };
 590
 591 static void dsicm_hw_reset(struct panel_drv_data *ddata)
 592 {
 593         gpiod_set_value(ddata->reset_gpio, 1);
 594         udelay(10);
 595         /* reset the panel */
 596         gpiod_set_value(ddata->reset_gpio, 0);
 597         /* assert reset */
 598         udelay(10);
 599         gpiod_set_value(ddata->reset_gpio, 1);
 600         /* wait after releasing reset */
 601         usleep_range(5000, 10000);
 602 }
 603
 604 static int dsicm_power_on(struct panel_drv_data *ddata)
 605 {
 606         struct omap_dss_device *src = ddata->dssdev.src;
 607         u8 id1, id2, id3;
 608         int r;
 609         struct omap_dss_dsi_config dsi_config = {
 610                 .mode = OMAP_DSS_DSI_CMD_MODE,
 611                 .pixel_format = OMAP_DSS_DSI_FMT_RGB888,
 612                 .vm = &ddata->vm,
 613                 .hs_clk_min = 150000000,
 614                 .hs_clk_max = 300000000,
 615                 .lp_clk_min = 7000000,
 616                 .lp_clk_max = 10000000,
 617         };
 618
 619         if (ddata->vpnl) {
 620                 r = regulator_enable(ddata->vpnl);
 621                 if (r) {
 622                         dev_err(&ddata->pdev->dev,
 623                                 "failed to enable VPNL: %d\n", r);
 624                         return r;
 625                 }
 626         }
 627
 628         if (ddata->vddi) {
 629                 r = regulator_enable(ddata->vddi);
 630                 if (r) {
 631                         dev_err(&ddata->pdev->dev,
 632                                 "failed to enable VDDI: %d\n", r);
 633                         goto err_vpnl;
 634                 }
 635         }
 636
 637         if (ddata->pin_config.num_pins > 0) {
 638                 r = src->ops->dsi.configure_pins(src, &ddata->pin_config);
 639                 if (r) {
 640                         dev_err(&ddata->pdev->dev,
 641                                 "failed to configure DSI pins\n");
 642                         goto err_vddi;
 643                 }
 644         }
 645
 646         r = src->ops->dsi.set_config(src, &dsi_config);
 647         if (r) {
 648                 dev_err(&ddata->pdev->dev, "failed to configure DSI\n");
 649                 goto err_vddi;
 650         }
 651
 652         r = src->ops->enable(src);
 653         if (r) {
 654                 dev_err(&ddata->pdev->dev, "failed to enable DSI\n");
 655                 goto err_vddi;
 656         }
 657
 658         dsicm_hw_reset(ddata);
 659
 660         src->ops->dsi.enable_hs(src, ddata->channel, false);
 661
 662         r = dsicm_sleep_out(ddata);
 663         if (r)
 664                 goto err;
 665
 666         r = dsicm_get_id(ddata, &id1, &id2, &id3);
 667         if (r)
 668                 goto err;
 669
 670         r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, 0xff);
 671         if (r)
 672                 goto err;
 673
 674         r = dsicm_dcs_write_1(ddata, DCS_CTRL_DISPLAY,
 675                         (1<<2) | (1<<5));       /* BL | BCTRL */
 676         if (r)
 677                 goto err;
 678
 679         r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_PIXEL_FORMAT,
 680                 MIPI_DCS_PIXEL_FMT_24BIT);
 681         if (r)
 682                 goto err;
 683
 684         r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_ON);
 685         if (r)
 686                 goto err;
 687
 688         r = _dsicm_enable_te(ddata, ddata->te_enabled);
 689         if (r)
 690                 goto err;
 691
 692         r = src->ops->dsi.enable_video_output(src, ddata->channel);
 693         if (r)
 694                 goto err;
 695
 696         ddata->enabled = 1;
 697
 698         if (!ddata->intro_printed) {
 699                 dev_info(&ddata->pdev->dev, "panel revision %02x.%02x.%02x\n",
 700                         id1, id2, id3);
 701                 ddata->intro_printed = true;
 702         }
 703
 704         src->ops->dsi.enable_hs(src, ddata->channel, true);
 705
 706         return 0;
 707 err:
 708         dev_err(&ddata->pdev->dev, "error while enabling panel, issuing HW reset\n");
 709
 710         dsicm_hw_reset(ddata);
 711
 712         src->ops->dsi.disable(src, true, false);
 713 err_vddi:
 714         if (ddata->vddi)
 715                 regulator_disable(ddata->vddi);
 716 err_vpnl:
 717         if (ddata->vpnl)
 718                 regulator_disable(ddata->vpnl);
 719
 720         return r;
 721 }
 722
 723 static void dsicm_power_off(struct panel_drv_data *ddata)
 724 {
 725         struct omap_dss_device *src = ddata->dssdev.src;
 726         int r;
 727
 728         src->ops->dsi.disable_video_output(src, ddata->channel);
 729
 730         r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_DISPLAY_OFF);
 731         if (!r)
 732                 r = dsicm_sleep_in(ddata);
 733
 734         if (r) {
 735                 dev_err(&ddata->pdev->dev,
 736                                 "error disabling panel, issuing HW reset\n");
 737                 dsicm_hw_reset(ddata);
 738         }
 739
 740         src->ops->dsi.disable(src, true, false);
 741
 742         if (ddata->vddi)
 743                 regulator_disable(ddata->vddi);
 744         if (ddata->vpnl)
 745                 regulator_disable(ddata->vpnl);
 746
 747         ddata->enabled = 0;
 748 }
 749
 750 static int dsicm_panel_reset(struct panel_drv_data *ddata)
 751 {
 752         dev_err(&ddata->pdev->dev, "performing LCD reset\n");
 753
 754         dsicm_power_off(ddata);
 755         dsicm_hw_reset(ddata);
 756         return dsicm_power_on(ddata);
 757 }
 758
 759 static int dsicm_connect(struct omap_dss_device *src,
 760                          struct omap_dss_device *dst)
 761 {
 762         struct panel_drv_data *ddata = to_panel_data(dst);
 763         struct device *dev = &ddata->pdev->dev;
 764         int r;
 765
 766         r = src->ops->dsi.request_vc(src, &ddata->channel);
 767         if (r) {
 768                 dev_err(dev, "failed to get virtual channel\n");
 769                 return r;
 770         }
 771
 772         r = src->ops->dsi.set_vc_id(src, ddata->channel, TCH);
 773         if (r) {
 774                 dev_err(dev, "failed to set VC_ID\n");
 775                 src->ops->dsi.release_vc(src, ddata->channel);
 776                 return r;
 777         }
 778
 779         return 0;
 780 }
 781
 782 static void dsicm_disconnect(struct omap_dss_device *src,
 783                              struct omap_dss_device *dst)
 784 {
 785         struct panel_drv_data *ddata = to_panel_data(dst);
 786
 787         src->ops->dsi.release_vc(src, ddata->channel);
 788 }
 789
 790 static int dsicm_enable(struct omap_dss_device *dssdev)
 791 {
 792         struct panel_drv_data *ddata = to_panel_data(dssdev);
 793         struct omap_dss_device *src = dssdev->src;
 794         int r;
 795
 796         dev_dbg(&ddata->pdev->dev, "enable\n");
 797
 798         mutex_lock(&ddata->lock);
 799
 800         if (!omapdss_device_is_connected(dssdev)) {
 801                 r = -ENODEV;
 802                 goto err;
 803         }
 804
 805         if (omapdss_device_is_enabled(dssdev)) {
 806                 r = 0;
 807                 goto err;
 808         }
 809
 810         src->ops->dsi.bus_lock(src);
 811
 812         r = dsicm_power_on(ddata);
 813
 814         src->ops->dsi.bus_unlock(src);
 815
 816         if (r)
 817                 goto err;
 818
 819         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 820
 821         mutex_unlock(&ddata->lock);
 822
 823         dsicm_bl_power(ddata, true);
 824
 825         return 0;
 826 err:
 827         dev_dbg(&ddata->pdev->dev, "enable failed\n");
 828         mutex_unlock(&ddata->lock);
 829         return r;
 830 }
 831
 832 static void dsicm_disable(struct omap_dss_device *dssdev)
 833 {
 834         struct panel_drv_data *ddata = to_panel_data(dssdev);
 835         struct omap_dss_device *src = dssdev->src;
 836         int r;
 837
 838         dev_dbg(&ddata->pdev->dev, "disable\n");
 839
 840         dsicm_bl_power(ddata, false);
 841
 842         mutex_lock(&ddata->lock);
 843
 844         dsicm_cancel_ulps_work(ddata);
 845
 846         src->ops->dsi.bus_lock(src);
 847
 848         if (omapdss_device_is_enabled(dssdev)) {
 849                 r = dsicm_wake_up(ddata);
 850                 if (!r)
 851                         dsicm_power_off(ddata);
 852         }
 853
 854         src->ops->dsi.bus_unlock(src);
 855
 856         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 857
 858         mutex_unlock(&ddata->lock);
 859 }
 860
 861 static void dsicm_framedone_cb(int err, void *data)
 862 {
 863         struct panel_drv_data *ddata = data;
 864         struct omap_dss_device *src = ddata->dssdev.src;
 865
 866         dev_dbg(&ddata->pdev->dev, "framedone, err %d\n", err);
 867         src->ops->dsi.bus_unlock(src);
 868 }
 869
 870 static irqreturn_t dsicm_te_isr(int irq, void *data)
 871 {
 872         struct panel_drv_data *ddata = data;
 873         struct omap_dss_device *src = ddata->dssdev.src;
 874         int old;
 875         int r;
 876
 877         old = atomic_cmpxchg(&ddata->do_update, 1, 0);
 878
 879         if (old) {
 880                 cancel_delayed_work(&ddata->te_timeout_work);
 881
 882                 r = src->ops->dsi.update(src, ddata->channel, dsicm_framedone_cb,
 883                                 ddata);
 884                 if (r)
 885                         goto err;
 886         }
 887
 888         return IRQ_HANDLED;
 889 err:
 890         dev_err(&ddata->pdev->dev, "start update failed\n");
 891         src->ops->dsi.bus_unlock(src);
 892         return IRQ_HANDLED;
 893 }
 894
 895 static void dsicm_te_timeout_work_callback(struct work_struct *work)
 896 {
 897         struct panel_drv_data *ddata = container_of(work, struct panel_drv_data,
 898                                         te_timeout_work.work);
 899         struct omap_dss_device *src = ddata->dssdev.src;
 900
 901         dev_err(&ddata->pdev->dev, "TE not received for 250ms!\n");
 902
 903         atomic_set(&ddata->do_update, 0);
 904         src->ops->dsi.bus_unlock(src);
 905 }
 906
 907 static int dsicm_update(struct omap_dss_device *dssdev,
 908                                     u16 x, u16 y, u16 w, u16 h)
 909 {
 910         struct panel_drv_data *ddata = to_panel_data(dssdev);
 911         struct omap_dss_device *src = dssdev->src;
 912         int r;
 913
 914         dev_dbg(&ddata->pdev->dev, "update %d, %d, %d x %d\n", x, y, w, h);
 915
 916         mutex_lock(&ddata->lock);
 917         src->ops->dsi.bus_lock(src);
 918
 919         r = dsicm_wake_up(ddata);
 920         if (r)
 921                 goto err;
 922
 923         if (!ddata->enabled) {
 924                 r = 0;
 925                 goto err;
 926         }
 927
 928         /* XXX no need to send this every frame, but dsi break if not done */
 929         r = dsicm_set_update_window(ddata, 0, 0, ddata->vm.hactive,
 930                                     ddata->vm.vactive);
 931         if (r)
 932                 goto err;
 933
 934         if (ddata->te_enabled && ddata->ext_te_gpio) {
 935                 schedule_delayed_work(&ddata->te_timeout_work,
 936                                 msecs_to_jiffies(250));
 937                 atomic_set(&ddata->do_update, 1);
 938         } else {
 939                 r = src->ops->dsi.update(src, ddata->channel, dsicm_framedone_cb,
 940                                 ddata);
 941                 if (r)
 942                         goto err;
 943         }
 944
 945         /* note: no bus_unlock here. unlock is src framedone_cb */
 946         mutex_unlock(&ddata->lock);
 947         return 0;
 948 err:
 949         src->ops->dsi.bus_unlock(src);
 950         mutex_unlock(&ddata->lock);
 951         return r;
 952 }
 953
 954 static int dsicm_sync(struct omap_dss_device *dssdev)
 955 {
 956         struct panel_drv_data *ddata = to_panel_data(dssdev);
 957         struct omap_dss_device *src = dssdev->src;
 958
 959         dev_dbg(&ddata->pdev->dev, "sync\n");
 960
 961         mutex_lock(&ddata->lock);
 962         src->ops->dsi.bus_lock(src);
 963         src->ops->dsi.bus_unlock(src);
 964         mutex_unlock(&ddata->lock);
 965
 966         dev_dbg(&ddata->pdev->dev, "sync done\n");
 967
 968         return 0;
 969 }
 970
 971 static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
 972 {
 973         struct omap_dss_device *src = ddata->dssdev.src;
 974         int r;
 975
 976         if (enable)
 977                 r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_TEAR_ON, 0);
 978         else
 979                 r = dsicm_dcs_write_0(ddata, MIPI_DCS_SET_TEAR_OFF);
 980
 981         if (!ddata->ext_te_gpio)
 982                 src->ops->dsi.enable_te(src, enable);
 983
 984         /* possible panel bug */
 985         msleep(100);
 986
 987         return r;
 988 }
 989
 990 static int dsicm_enable_te(struct omap_dss_device *dssdev, bool enable)
 991 {
 992         struct panel_drv_data *ddata = to_panel_data(dssdev);
 993         struct omap_dss_device *src = dssdev->src;
 994         int r;
 995
 996         mutex_lock(&ddata->lock);
 997
 998         if (ddata->te_enabled == enable)
 999                 goto end;
1000
1001         src->ops->dsi.bus_lock(src);
1002
1003         if (ddata->enabled) {
1004                 r = dsicm_wake_up(ddata);
1005                 if (r)
1006                         goto err;
1007
1008                 r = _dsicm_enable_te(ddata, enable);
1009                 if (r)
1010                         goto err;
1011         }
1012
1013         ddata->te_enabled = enable;
1014
1015         src->ops->dsi.bus_unlock(src);
1016 end:
1017         mutex_unlock(&ddata->lock);
1018
1019         return 0;
1020 err:
1021         src->ops->dsi.bus_unlock(src);
1022         mutex_unlock(&ddata->lock);
1023
1024         return r;
1025 }
1026
1027 static int dsicm_get_te(struct omap_dss_device *dssdev)
1028 {
1029         struct panel_drv_data *ddata = to_panel_data(dssdev);
1030         int r;
1031
1032         mutex_lock(&ddata->lock);
1033         r = ddata->te_enabled;
1034         mutex_unlock(&ddata->lock);
1035
1036         return r;
1037 }
1038
1039 static int dsicm_memory_read(struct omap_dss_device *dssdev,
1040                 void *buf, size_t size,
1041                 u16 x, u16 y, u16 w, u16 h)
1042 {
1043         struct panel_drv_data *ddata = to_panel_data(dssdev);
1044         struct omap_dss_device *src = dssdev->src;
1045         int r;
1046         int first = 1;
1047         int plen;
1048         unsigned int buf_used = 0;
1049
1050         if (size < w * h * 3)
1051                 return -ENOMEM;
1052
1053         mutex_lock(&ddata->lock);
1054
1055         if (!ddata->enabled) {
1056                 r = -ENODEV;
1057                 goto err1;
1058         }
1059
1060         size = min((u32)w * h * 3,
1061                    ddata->vm.hactive * ddata->vm.vactive * 3);
1062
1063         src->ops->dsi.bus_lock(src);
1064
1065         r = dsicm_wake_up(ddata);
1066         if (r)
1067                 goto err2;
1068
1069         /* plen 1 or 2 goes into short packet. until checksum error is fixed,
1070          * use short packets. plen 32 works, but bigger packets seem to cause
1071          * an error. */
1072         if (size % 2)
1073                 plen = 1;
1074         else
1075                 plen = 2;
1076
1077         dsicm_set_update_window(ddata, x, y, w, h);
1078
1079         r = src->ops->dsi.set_max_rx_packet_size(src, ddata->channel, plen);
1080         if (r)
1081                 goto err2;
1082
1083         while (buf_used < size) {
1084                 u8 dcs_cmd = first ? 0x2e : 0x3e;
1085                 first = 0;
1086
1087                 r = src->ops->dsi.dcs_read(src, ddata->channel, dcs_cmd,
1088                                 buf + buf_used, size - buf_used);
1089
1090                 if (r < 0) {
1091                         dev_err(dssdev->dev, "read error\n");
1092                         goto err3;
1093                 }
1094
1095                 buf_used += r;
1096
1097                 if (r < plen) {
1098                         dev_err(&ddata->pdev->dev, "short read\n");
1099                         break;
1100                 }
1101
1102                 if (signal_pending(current)) {
1103                         dev_err(&ddata->pdev->dev, "signal pending, "
1104                                         "aborting memory read\n");
1105                         r = -ERESTARTSYS;
1106                         goto err3;
1107                 }
1108         }
1109
1110         r = buf_used;
1111
1112 err3:
1113         src->ops->dsi.set_max_rx_packet_size(src, ddata->channel, 1);
1114 err2:
1115         src->ops->dsi.bus_unlock(src);
1116 err1:
1117         mutex_unlock(&ddata->lock);
1118         return r;
1119 }
1120
1121 static void dsicm_ulps_work(struct work_struct *work)
1122 {
1123         struct panel_drv_data *ddata = container_of(work, struct panel_drv_data,
1124                         ulps_work.work);
1125         struct omap_dss_device *dssdev = &ddata->dssdev;
1126         struct omap_dss_device *src = dssdev->src;
1127
1128         mutex_lock(&ddata->lock);
1129
1130         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE || !ddata->enabled) {
1131                 mutex_unlock(&ddata->lock);
1132                 return;
1133         }
1134
1135         src->ops->dsi.bus_lock(src);
1136
1137         dsicm_enter_ulps(ddata);
1138
1139         src->ops->dsi.bus_unlock(src);
1140         mutex_unlock(&ddata->lock);
1141 }
1142
1143 static void dsicm_get_timings(struct omap_dss_device *dssdev,
1144                               struct videomode *vm)
1145 {
1146         struct panel_drv_data *ddata = to_panel_data(dssdev);
1147
1148         *vm = ddata->vm;
1149 }
1150
1151 static int dsicm_check_timings(struct omap_dss_device *dssdev,
1152                                struct videomode *vm)
1153 {
1154         struct panel_drv_data *ddata = to_panel_data(dssdev);
1155         int ret = 0;
1156
1157         if (vm->hactive != ddata->vm.hactive)
1158                 ret = -EINVAL;
1159
1160         if (vm->vactive != ddata->vm.vactive)
1161                 ret = -EINVAL;
1162
1163         if (ret) {
1164                 dev_warn(dssdev->dev, "wrong resolution: %d x %d",
1165                          vm->hactive, vm->vactive);
1166                 dev_warn(dssdev->dev, "panel resolution: %d x %d",
1167                          ddata->vm.hactive, ddata->vm.vactive);
1168         }
1169
1170         return ret;
1171 }
1172
1173 static void dsicm_get_size(struct omap_dss_device *dssdev,
1174                           unsigned int *width, unsigned int *height)
1175 {
1176         struct panel_drv_data *ddata = to_panel_data(dssdev);
1177
1178         *width = ddata->width_mm;
1179         *height = ddata->height_mm;
1180 }
1181
1182 static const struct omap_dss_device_ops dsicm_ops = {
1183         .connect        = dsicm_connect,
1184         .disconnect     = dsicm_disconnect,
1185
1186         .enable         = dsicm_enable,
1187         .disable        = dsicm_disable,
1188
1189         .get_timings    = dsicm_get_timings,
1190         .check_timings  = dsicm_check_timings,
1191 };
1192
1193 static const struct omap_dss_driver dsicm_dss_driver = {
1194         .update         = dsicm_update,
1195         .sync           = dsicm_sync,
1196
1197         .get_size       = dsicm_get_size,
1198
1199         .enable_te      = dsicm_enable_te,
1200         .get_te         = dsicm_get_te,
1201
1202         .memory_read    = dsicm_memory_read,
1203 };
1204
1205 static int dsicm_probe_of(struct platform_device *pdev)
1206 {
1207         struct device_node *node = pdev->dev.of_node;
1208         struct device_node *backlight;
1209         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
1210         struct display_timing timing;
1211         int err;
1212
1213         ddata->reset_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
1214         if (IS_ERR(ddata->reset_gpio)) {
1215                 err = PTR_ERR(ddata->reset_gpio);
1216                 dev_err(&pdev->dev, "reset gpio request failed: %d", err);
1217                 return err;
1218         }
1219
1220         ddata->ext_te_gpio = devm_gpiod_get_optional(&pdev->dev, "te",
1221                                                      GPIOD_IN);
1222         if (IS_ERR(ddata->ext_te_gpio)) {
1223                 err = PTR_ERR(ddata->ext_te_gpio);
1224                 dev_err(&pdev->dev, "TE gpio request failed: %d", err);
1225                 return err;
1226         }
1227
1228         err = of_get_display_timing(node, "panel-timing", &timing);
1229         if (!err) {
1230                 videomode_from_timing(&timing, &ddata->vm);
1231                 if (!ddata->vm.pixelclock)
1232                         ddata->vm.pixelclock =
1233                                 ddata->vm.hactive * ddata->vm.vactive * 60;
1234         } else {
1235                 dev_warn(&pdev->dev,
1236                          "failed to get video timing, using defaults\n");
1237         }
1238
1239         ddata->width_mm = 0;
1240         of_property_read_u32(node, "width-mm", &ddata->width_mm);
1241
1242         ddata->height_mm = 0;
1243         of_property_read_u32(node, "height-mm", &ddata->height_mm);
1244
1245         ddata->vpnl = devm_regulator_get_optional(&pdev->dev, "vpnl");
1246         if (IS_ERR(ddata->vpnl)) {
1247                 err = PTR_ERR(ddata->vpnl);
1248                 if (err == -EPROBE_DEFER)
1249                         return err;
1250                 ddata->vpnl = NULL;
1251         }
1252
1253         ddata->vddi = devm_regulator_get_optional(&pdev->dev, "vddi");
1254         if (IS_ERR(ddata->vddi)) {
1255                 err = PTR_ERR(ddata->vddi);
1256                 if (err == -EPROBE_DEFER)
1257                         return err;
1258                 ddata->vddi = NULL;
1259         }
1260
1261         backlight = of_parse_phandle(node, "backlight", 0);
1262         if (backlight) {
1263                 ddata->extbldev = of_find_backlight_by_node(backlight);
1264                 of_node_put(backlight);
1265
1266                 if (!ddata->extbldev)
1267                         return -EPROBE_DEFER;
1268         } else {
1269                 /* assume native backlight support */
1270                 ddata->use_dsi_backlight = true;
1271         }
1272
1273         /* TODO: ulps */
1274
1275         return 0;
1276 }
1277
1278 static int dsicm_probe(struct platform_device *pdev)
1279 {
1280         struct panel_drv_data *ddata;
1281         struct backlight_device *bldev = NULL;
1282         struct device *dev = &pdev->dev;
1283         struct omap_dss_device *dssdev;
1284         int r;
1285
1286         dev_dbg(dev, "probe\n");
1287
1288         ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
1289         if (!ddata)
1290                 return -ENOMEM;
1291
1292         platform_set_drvdata(pdev, ddata);
1293         ddata->pdev = pdev;
1294
1295         ddata->vm.hactive = 864;
1296         ddata->vm.vactive = 480;
1297         ddata->vm.pixelclock = 864 * 480 * 60;
1298
1299         r = dsicm_probe_of(pdev);
1300         if (r)
1301                 return r;
1302
1303         dssdev = &ddata->dssdev;
1304         dssdev->dev = dev;
1305         dssdev->ops = &dsicm_ops;
1306         dssdev->driver = &dsicm_dss_driver;
1307         dssdev->type = OMAP_DISPLAY_TYPE_DSI;
1308         dssdev->owner = THIS_MODULE;
1309         dssdev->of_ports = BIT(0);
1310
1311         dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
1312                 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
1313
1314         omapdss_display_init(dssdev);
1315         omapdss_device_register(dssdev);
1316
1317         mutex_init(&ddata->lock);
1318
1319         atomic_set(&ddata->do_update, 0);
1320
1321         if (ddata->ext_te_gpio) {
1322                 r = devm_request_irq(dev, gpiod_to_irq(ddata->ext_te_gpio),
1323                                 dsicm_te_isr,
1324                                 IRQF_TRIGGER_RISING,
1325                                 "taal vsync", ddata);
1326
1327                 if (r) {
1328                         dev_err(dev, "IRQ request failed\n");
1329                         goto err_reg;
1330                 }
1331
1332                 INIT_DEFERRABLE_WORK(&ddata->te_timeout_work,
1333                                         dsicm_te_timeout_work_callback);
1334
1335                 dev_dbg(dev, "Using GPIO TE\n");
1336         }
1337
1338         ddata->workqueue = create_singlethread_workqueue("dsicm_wq");
1339         if (!ddata->workqueue) {
1340                 r = -ENOMEM;
1341                 goto err_reg;
1342         }
1343         INIT_DELAYED_WORK(&ddata->ulps_work, dsicm_ulps_work);
1344
1345         dsicm_hw_reset(ddata);
1346
1347         if (ddata->use_dsi_backlight) {
1348                 struct backlight_properties props = { 0 };
1349                 props.max_brightness = 255;
1350                 props.type = BACKLIGHT_RAW;
1351
1352                 bldev = devm_backlight_device_register(dev, dev_name(dev),
1353                         dev, ddata, &dsicm_bl_ops, &props);
1354                 if (IS_ERR(bldev)) {
1355                         r = PTR_ERR(bldev);
1356                         goto err_bl;
1357                 }
1358
1359                 ddata->bldev = bldev;
1360         }
1361
1362         r = sysfs_create_group(&dev->kobj, &dsicm_attr_group);
1363         if (r) {
1364                 dev_err(dev, "failed to create sysfs files\n");
1365                 goto err_bl;
1366         }
1367
1368         return 0;
1369
1370 err_bl:
1371         destroy_workqueue(ddata->workqueue);
1372 err_reg:
1373         if (ddata->extbldev)
1374                 put_device(&ddata->extbldev->dev);
1375
1376         return r;
1377 }
1378
1379 static int __exit dsicm_remove(struct platform_device *pdev)
1380 {
1381         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
1382         struct omap_dss_device *dssdev = &ddata->dssdev;
1383
1384         dev_dbg(&pdev->dev, "remove\n");
1385
1386         omapdss_device_unregister(dssdev);
1387
1388         dsicm_disable(dssdev);
1389         omapdss_device_disconnect(dssdev->src, dssdev);
1390
1391         sysfs_remove_group(&pdev->dev.kobj, &dsicm_attr_group);
1392
1393         if (ddata->extbldev)
1394                 put_device(&ddata->extbldev->dev);
1395
1396         dsicm_cancel_ulps_work(ddata);
1397         destroy_workqueue(ddata->workqueue);
1398
1399         /* reset, to be sure that the panel is in a valid state */
1400         dsicm_hw_reset(ddata);
1401
1402         return 0;
1403 }
1404
1405 static const struct of_device_id dsicm_of_match[] = {
1406         { .compatible = "omapdss,panel-dsi-cm", },
1407         {},
1408 };
1409
1410 MODULE_DEVICE_TABLE(of, dsicm_of_match);
1411
1412 static struct platform_driver dsicm_driver = {
1413         .probe = dsicm_probe,
1414         .remove = __exit_p(dsicm_remove),
1415         .driver = {
1416                 .name = "panel-dsi-cm",
1417                 .of_match_table = dsicm_of_match,
1418                 .suppress_bind_attrs = true,
1419         },
1420 };
1421
1422 module_platform_driver(dsicm_driver);
1423
1424 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
1425 MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver");
1426 MODULE_LICENSE("GPL");