drivers/video/sh_mobile_lcdcfb.c

   1 /*
   2  * SuperH Mobile LCDC Framebuffer
   3  *
   4  * Copyright (c) 2008 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/atomic.h>
  12 #include <linux/backlight.h>
  13 #include <linux/clk.h>
  14 #include <linux/console.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/delay.h>
  17 #include <linux/gpio.h>
  18 #include <linux/init.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/ioctl.h>
  21 #include <linux/kernel.h>
  22 #include <linux/mm.h>
  23 #include <linux/module.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/slab.h>
  27 #include <linux/videodev2.h>
  28 #include <linux/vmalloc.h>
  29
  30 #include <video/sh_mobile_lcdc.h>
  31 #include <video/sh_mobile_meram.h>
  32
  33 #include "sh_mobile_lcdcfb.h"
  34
  35 #define SIDE_B_OFFSET 0x1000
  36 #define MIRROR_OFFSET 0x2000
  37
  38 #define MAX_XRES 1920
  39 #define MAX_YRES 1080
  40
  41 struct sh_mobile_lcdc_priv {
  42         void __iomem *base;
  43         int irq;
  44         atomic_t hw_usecnt;
  45         struct device *dev;
  46         struct clk *dot_clk;
  47         unsigned long lddckr;
  48         struct sh_mobile_lcdc_chan ch[2];
  49         struct notifier_block notifier;
  50         int started;
  51         int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
  52         struct sh_mobile_meram_info *meram_dev;
  53 };
  54
  55 /* -----------------------------------------------------------------------------
  56  * Registers access
  57  */
  58
  59 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
  60         [LDDCKPAT1R] = 0x400,
  61         [LDDCKPAT2R] = 0x404,
  62         [LDMT1R] = 0x418,
  63         [LDMT2R] = 0x41c,
  64         [LDMT3R] = 0x420,
  65         [LDDFR] = 0x424,
  66         [LDSM1R] = 0x428,
  67         [LDSM2R] = 0x42c,
  68         [LDSA1R] = 0x430,
  69         [LDSA2R] = 0x434,
  70         [LDMLSR] = 0x438,
  71         [LDHCNR] = 0x448,
  72         [LDHSYNR] = 0x44c,
  73         [LDVLNR] = 0x450,
  74         [LDVSYNR] = 0x454,
  75         [LDPMR] = 0x460,
  76         [LDHAJR] = 0x4a0,
  77 };
  78
  79 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
  80         [LDDCKPAT1R] = 0x408,
  81         [LDDCKPAT2R] = 0x40c,
  82         [LDMT1R] = 0x600,
  83         [LDMT2R] = 0x604,
  84         [LDMT3R] = 0x608,
  85         [LDDFR] = 0x60c,
  86         [LDSM1R] = 0x610,
  87         [LDSM2R] = 0x614,
  88         [LDSA1R] = 0x618,
  89         [LDMLSR] = 0x620,
  90         [LDHCNR] = 0x624,
  91         [LDHSYNR] = 0x628,
  92         [LDVLNR] = 0x62c,
  93         [LDVSYNR] = 0x630,
  94         [LDPMR] = 0x63c,
  95 };
  96
  97 static bool banked(int reg_nr)
  98 {
  99         switch (reg_nr) {
 100         case LDMT1R:
 101         case LDMT2R:
 102         case LDMT3R:
 103         case LDDFR:
 104         case LDSM1R:
 105         case LDSA1R:
 106         case LDSA2R:
 107         case LDMLSR:
 108         case LDHCNR:
 109         case LDHSYNR:
 110         case LDVLNR:
 111         case LDVSYNR:
 112                 return true;
 113         }
 114         return false;
 115 }
 116
 117 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 118 {
 119         return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 120 }
 121
 122 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 123                             int reg_nr, unsigned long data)
 124 {
 125         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 126         if (banked(reg_nr))
 127                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 128                           SIDE_B_OFFSET);
 129 }
 130
 131 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 132                             int reg_nr, unsigned long data)
 133 {
 134         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 135                   MIRROR_OFFSET);
 136 }
 137
 138 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 139                                     int reg_nr)
 140 {
 141         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 142 }
 143
 144 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 145                        unsigned long reg_offs, unsigned long data)
 146 {
 147         iowrite32(data, priv->base + reg_offs);
 148 }
 149
 150 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 151                                unsigned long reg_offs)
 152 {
 153         return ioread32(priv->base + reg_offs);
 154 }
 155
 156 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 157                           unsigned long reg_offs,
 158                           unsigned long mask, unsigned long until)
 159 {
 160         while ((lcdc_read(priv, reg_offs) & mask) != until)
 161                 cpu_relax();
 162 }
 163
 164 /* -----------------------------------------------------------------------------
 165  * Clock management
 166  */
 167
 168 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 169 {
 170         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 171                 if (priv->dot_clk)
 172                         clk_enable(priv->dot_clk);
 173                 pm_runtime_get_sync(priv->dev);
 174                 if (priv->meram_dev && priv->meram_dev->pdev)
 175                         pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
 176         }
 177 }
 178
 179 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 180 {
 181         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 182                 if (priv->meram_dev && priv->meram_dev->pdev)
 183                         pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
 184                 pm_runtime_put(priv->dev);
 185                 if (priv->dot_clk)
 186                         clk_disable(priv->dot_clk);
 187         }
 188 }
 189
 190 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 191                                        int clock_source)
 192 {
 193         struct clk *clk;
 194         char *str;
 195
 196         switch (clock_source) {
 197         case LCDC_CLK_BUS:
 198                 str = "bus_clk";
 199                 priv->lddckr = LDDCKR_ICKSEL_BUS;
 200                 break;
 201         case LCDC_CLK_PERIPHERAL:
 202                 str = "peripheral_clk";
 203                 priv->lddckr = LDDCKR_ICKSEL_MIPI;
 204                 break;
 205         case LCDC_CLK_EXTERNAL:
 206                 str = NULL;
 207                 priv->lddckr = LDDCKR_ICKSEL_HDMI;
 208                 break;
 209         default:
 210                 return -EINVAL;
 211         }
 212
 213         if (str == NULL)
 214                 return 0;
 215
 216         clk = clk_get(priv->dev, str);
 217         if (IS_ERR(clk)) {
 218                 dev_err(priv->dev, "cannot get dot clock %s\n", str);
 219                 return PTR_ERR(clk);
 220         }
 221
 222         priv->dot_clk = clk;
 223         return 0;
 224 }
 225
 226 /* -----------------------------------------------------------------------------
 227  * Display, panel and deferred I/O
 228  */
 229
 230 static void lcdc_sys_write_index(void *handle, unsigned long data)
 231 {
 232         struct sh_mobile_lcdc_chan *ch = handle;
 233
 234         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 235         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 236         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 237                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 238         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 239 }
 240
 241 static void lcdc_sys_write_data(void *handle, unsigned long data)
 242 {
 243         struct sh_mobile_lcdc_chan *ch = handle;
 244
 245         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 246         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 247         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 248                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 249         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 250 }
 251
 252 static unsigned long lcdc_sys_read_data(void *handle)
 253 {
 254         struct sh_mobile_lcdc_chan *ch = handle;
 255
 256         lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 257         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 258         lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 259                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 260         udelay(1);
 261         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 262
 263         return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 264 }
 265
 266 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 267         lcdc_sys_write_index,
 268         lcdc_sys_write_data,
 269         lcdc_sys_read_data,
 270 };
 271
 272 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 273                                   struct list_head *pagelist)
 274 {
 275         struct sh_mobile_lcdc_chan *ch = info->par;
 276         unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 277         struct page *page;
 278         int nr_pages = 0;
 279
 280         sg_init_table(ch->sglist, nr_pages_max);
 281
 282         list_for_each_entry(page, pagelist, lru)
 283                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 284
 285         return nr_pages;
 286 }
 287
 288 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 289                                        struct list_head *pagelist)
 290 {
 291         struct sh_mobile_lcdc_chan *ch = info->par;
 292         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 293
 294         /* enable clocks before accessing hardware */
 295         sh_mobile_lcdc_clk_on(ch->lcdc);
 296
 297         /*
 298          * It's possible to get here without anything on the pagelist via
 299          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 300          * invocation. In the former case, the acceleration routines are
 301          * stepped in to when using the framebuffer console causing the
 302          * workqueue to be scheduled without any dirty pages on the list.
 303          *
 304          * Despite this, a panel update is still needed given that the
 305          * acceleration routines have their own methods for writing in
 306          * that still need to be updated.
 307          *
 308          * The fsync() and empty pagelist case could be optimized for,
 309          * but we don't bother, as any application exhibiting such
 310          * behaviour is fundamentally broken anyways.
 311          */
 312         if (!list_empty(pagelist)) {
 313                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 314
 315                 /* trigger panel update */
 316                 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 317                 if (panel->start_transfer)
 318                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 319                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 320                 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 321                              DMA_TO_DEVICE);
 322         } else {
 323                 if (panel->start_transfer)
 324                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 325                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 326         }
 327 }
 328
 329 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 330 {
 331         struct fb_deferred_io *fbdefio = info->fbdefio;
 332
 333         if (fbdefio)
 334                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 335 }
 336
 337 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 338 {
 339         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 340
 341         if (ch->tx_dev) {
 342                 int ret;
 343
 344                 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 345                 if (ret < 0)
 346                         return;
 347
 348                 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 349                         ch->info->state = FBINFO_STATE_SUSPENDED;
 350         }
 351
 352         /* HDMI must be enabled before LCDC configuration */
 353         if (panel->display_on)
 354                 panel->display_on();
 355 }
 356
 357 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 358 {
 359         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 360
 361         if (panel->display_off)
 362                 panel->display_off();
 363
 364         if (ch->tx_dev)
 365                 ch->tx_dev->ops->display_off(ch->tx_dev);
 366 }
 367
 368 static bool
 369 sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
 370                                 const struct fb_videomode *new_mode)
 371 {
 372         dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
 373                 ch->display.mode.xres, ch->display.mode.yres,
 374                 new_mode->xres, new_mode->yres);
 375
 376         /* It can be a different monitor with an equal video-mode */
 377         if (fb_mode_is_equal(&ch->display.mode, new_mode))
 378                 return false;
 379
 380         dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
 381                 ch->display.mode.yres, new_mode->yres);
 382         ch->display.mode = *new_mode;
 383
 384         return true;
 385 }
 386
 387 static int sh_mobile_check_var(struct fb_var_screeninfo *var,
 388                                struct fb_info *info);
 389
 390 static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
 391                                          enum sh_mobile_lcdc_entity_event event,
 392                                          const struct fb_videomode *mode,
 393                                          const struct fb_monspecs *monspec)
 394 {
 395         struct fb_info *info = ch->info;
 396         struct fb_var_screeninfo var;
 397         int ret = 0;
 398
 399         switch (event) {
 400         case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
 401                 /* HDMI plug in */
 402                 if (lock_fb_info(info)) {
 403                         console_lock();
 404
 405                         ch->display.width = monspec->max_x * 10;
 406                         ch->display.height = monspec->max_y * 10;
 407
 408                         if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
 409                             info->state == FBINFO_STATE_RUNNING) {
 410                                 /* First activation with the default monitor.
 411                                  * Just turn on, if we run a resume here, the
 412                                  * logo disappears.
 413                                  */
 414                                 info->var.width = monspec->max_x * 10;
 415                                 info->var.height = monspec->max_y * 10;
 416                                 sh_mobile_lcdc_display_on(ch);
 417                         } else {
 418                                 /* New monitor or have to wake up */
 419                                 fb_set_suspend(info, 0);
 420                         }
 421
 422                         console_unlock();
 423                         unlock_fb_info(info);
 424                 }
 425                 break;
 426
 427         case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
 428                 /* HDMI disconnect */
 429                 if (lock_fb_info(info)) {
 430                         console_lock();
 431                         fb_set_suspend(info, 1);
 432                         console_unlock();
 433                         unlock_fb_info(info);
 434                 }
 435                 break;
 436
 437         case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
 438                 /* Validate a proposed new mode */
 439                 fb_videomode_to_var(&var, mode);
 440                 var.bits_per_pixel = info->var.bits_per_pixel;
 441                 var.grayscale = info->var.grayscale;
 442                 ret = sh_mobile_check_var(&var, info);
 443                 break;
 444         }
 445
 446         return ret;
 447 }
 448
 449 /* -----------------------------------------------------------------------------
 450  * Format helpers
 451  */
 452
 453 struct sh_mobile_lcdc_format_info {
 454         u32 fourcc;
 455         unsigned int bpp;
 456         bool yuv;
 457         u32 lddfr;
 458 };
 459
 460 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 461         {
 462                 .fourcc = V4L2_PIX_FMT_RGB565,
 463                 .bpp = 16,
 464                 .yuv = false,
 465                 .lddfr = LDDFR_PKF_RGB16,
 466         }, {
 467                 .fourcc = V4L2_PIX_FMT_BGR24,
 468                 .bpp = 24,
 469                 .yuv = false,
 470                 .lddfr = LDDFR_PKF_RGB24,
 471         }, {
 472                 .fourcc = V4L2_PIX_FMT_BGR32,
 473                 .bpp = 32,
 474                 .yuv = false,
 475                 .lddfr = LDDFR_PKF_ARGB32,
 476         }, {
 477                 .fourcc = V4L2_PIX_FMT_NV12,
 478                 .bpp = 12,
 479                 .yuv = true,
 480                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 481         }, {
 482                 .fourcc = V4L2_PIX_FMT_NV21,
 483                 .bpp = 12,
 484                 .yuv = true,
 485                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 486         }, {
 487                 .fourcc = V4L2_PIX_FMT_NV16,
 488                 .bpp = 16,
 489                 .yuv = true,
 490                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 491         }, {
 492                 .fourcc = V4L2_PIX_FMT_NV61,
 493                 .bpp = 16,
 494                 .yuv = true,
 495                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 496         }, {
 497                 .fourcc = V4L2_PIX_FMT_NV24,
 498                 .bpp = 24,
 499                 .yuv = true,
 500                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 501         }, {
 502                 .fourcc = V4L2_PIX_FMT_NV42,
 503                 .bpp = 24,
 504                 .yuv = true,
 505                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 506         },
 507 };
 508
 509 static const struct sh_mobile_lcdc_format_info *
 510 sh_mobile_format_info(u32 fourcc)
 511 {
 512         unsigned int i;
 513
 514         for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 515                 if (sh_mobile_format_infos[i].fourcc == fourcc)
 516                         return &sh_mobile_format_infos[i];
 517         }
 518
 519         return NULL;
 520 }
 521
 522 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 523 {
 524         if (var->grayscale > 1)
 525                 return var->grayscale;
 526
 527         switch (var->bits_per_pixel) {
 528         case 16:
 529                 return V4L2_PIX_FMT_RGB565;
 530         case 24:
 531                 return V4L2_PIX_FMT_BGR24;
 532         case 32:
 533                 return V4L2_PIX_FMT_BGR32;
 534         default:
 535                 return 0;
 536         }
 537 }
 538
 539 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 540 {
 541         return var->grayscale > 1;
 542 }
 543
 544 /* -----------------------------------------------------------------------------
 545  * Start, stop and IRQ
 546  */
 547
 548 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 549 {
 550         struct sh_mobile_lcdc_priv *priv = data;
 551         struct sh_mobile_lcdc_chan *ch;
 552         unsigned long ldintr;
 553         int is_sub;
 554         int k;
 555
 556         /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 557         ldintr = lcdc_read(priv, _LDINTR);
 558         lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 559
 560         /* figure out if this interrupt is for main or sub lcd */
 561         is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 562
 563         /* wake up channel and disable clocks */
 564         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 565                 ch = &priv->ch[k];
 566
 567                 if (!ch->enabled)
 568                         continue;
 569
 570                 /* Frame End */
 571                 if (ldintr & LDINTR_FS) {
 572                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 573                                 ch->frame_end = 1;
 574                                 wake_up(&ch->frame_end_wait);
 575
 576                                 sh_mobile_lcdc_clk_off(priv);
 577                         }
 578                 }
 579
 580                 /* VSYNC End */
 581                 if (ldintr & LDINTR_VES)
 582                         complete(&ch->vsync_completion);
 583         }
 584
 585         return IRQ_HANDLED;
 586 }
 587
 588 static int sh_mobile_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 589 {
 590         unsigned long ldintr;
 591         int ret;
 592
 593         /* Enable VSync End interrupt and be careful not to acknowledge any
 594          * pending interrupt.
 595          */
 596         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 597         ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 598         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 599
 600         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 601                                                         msecs_to_jiffies(100));
 602         if (!ret)
 603                 return -ETIMEDOUT;
 604
 605         return 0;
 606 }
 607
 608 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 609                                       int start)
 610 {
 611         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 612         int k;
 613
 614         /* start or stop the lcdc */
 615         if (start)
 616                 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 617         else
 618                 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 619
 620         /* wait until power is applied/stopped on all channels */
 621         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 622                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 623                         while (1) {
 624                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 625                                     & LDPMR_LPS;
 626                                 if (start && tmp == LDPMR_LPS)
 627                                         break;
 628                                 if (!start && tmp == 0)
 629                                         break;
 630                                 cpu_relax();
 631                         }
 632
 633         if (!start)
 634                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 635 }
 636
 637 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 638 {
 639         const struct fb_var_screeninfo *var = &ch->info->var;
 640         const struct fb_videomode *mode = &ch->display.mode;
 641         unsigned long h_total, hsync_pos, display_h_total;
 642         u32 tmp;
 643
 644         tmp = ch->ldmt1r_value;
 645         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 646         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 647         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 648         tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 649         tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 650         tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 651         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 652         lcdc_write_chan(ch, LDMT1R, tmp);
 653
 654         /* setup SYS bus */
 655         lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 656         lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 657
 658         /* horizontal configuration */
 659         h_total = mode->xres + mode->hsync_len + mode->left_margin
 660                 + mode->right_margin;
 661         tmp = h_total / 8; /* HTCN */
 662         tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 663         lcdc_write_chan(ch, LDHCNR, tmp);
 664
 665         hsync_pos = mode->xres + mode->right_margin;
 666         tmp = hsync_pos / 8; /* HSYNP */
 667         tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 668         lcdc_write_chan(ch, LDHSYNR, tmp);
 669
 670         /* vertical configuration */
 671         tmp = mode->yres + mode->vsync_len + mode->upper_margin
 672             + mode->lower_margin; /* VTLN */
 673         tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 674         lcdc_write_chan(ch, LDVLNR, tmp);
 675
 676         tmp = mode->yres + mode->lower_margin; /* VSYNP */
 677         tmp |= mode->vsync_len << 16; /* VSYNW */
 678         lcdc_write_chan(ch, LDVSYNR, tmp);
 679
 680         /* Adjust horizontal synchronisation for HDMI */
 681         display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 682                         + mode->right_margin;
 683         tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 684             | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 685         lcdc_write_chan(ch, LDHAJR, tmp);
 686 }
 687
 688 /*
 689  * __sh_mobile_lcdc_start - Configure and tart the LCDC
 690  * @priv: LCDC device
 691  *
 692  * Configure all enabled channels and start the LCDC device. All external
 693  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 694  */
 695 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 696 {
 697         struct sh_mobile_lcdc_chan *ch;
 698         unsigned long tmp;
 699         int k, m;
 700
 701         /* Enable LCDC channels. Read data from external memory, avoid using the
 702          * BEU for now.
 703          */
 704         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 705
 706         /* Stop the LCDC first and disable all interrupts. */
 707         sh_mobile_lcdc_start_stop(priv, 0);
 708         lcdc_write(priv, _LDINTR, 0);
 709
 710         /* Configure power supply, dot clocks and start them. */
 711         tmp = priv->lddckr;
 712         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 713                 ch = &priv->ch[k];
 714                 if (!ch->enabled)
 715                         continue;
 716
 717                 /* Power supply */
 718                 lcdc_write_chan(ch, LDPMR, 0);
 719
 720                 m = ch->cfg->clock_divider;
 721                 if (!m)
 722                         continue;
 723
 724                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 725                  * denominator.
 726                  */
 727                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 728                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 729
 730                 if (m == 1)
 731                         m = LDDCKR_MOSEL;
 732                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 733         }
 734
 735         lcdc_write(priv, _LDDCKR, tmp);
 736         lcdc_write(priv, _LDDCKSTPR, 0);
 737         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 738
 739         /* Setup geometry, format, frame buffer memory and operation mode. */
 740         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 741                 ch = &priv->ch[k];
 742                 if (!ch->enabled)
 743                         continue;
 744
 745                 sh_mobile_lcdc_geometry(ch);
 746
 747                 tmp = ch->format->lddfr;
 748
 749                 if (ch->format->yuv) {
 750                         switch (ch->colorspace) {
 751                         case V4L2_COLORSPACE_REC709:
 752                                 tmp |= LDDFR_CF1;
 753                                 break;
 754                         case V4L2_COLORSPACE_JPEG:
 755                                 tmp |= LDDFR_CF0;
 756                                 break;
 757                         }
 758                 }
 759
 760                 lcdc_write_chan(ch, LDDFR, tmp);
 761                 lcdc_write_chan(ch, LDMLSR, ch->pitch);
 762                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
 763                 if (ch->format->yuv)
 764                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
 765
 766                 /* When using deferred I/O mode, configure the LCDC for one-shot
 767                  * operation and enable the frame end interrupt. Otherwise use
 768                  * continuous read mode.
 769                  */
 770                 if (ch->ldmt1r_value & LDMT1R_IFM &&
 771                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
 772                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
 773                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 774                 } else {
 775                         lcdc_write_chan(ch, LDSM1R, 0);
 776                 }
 777         }
 778
 779         /* Word and long word swap. */
 780         switch (priv->ch[0].format->fourcc) {
 781         case V4L2_PIX_FMT_RGB565:
 782         case V4L2_PIX_FMT_NV21:
 783         case V4L2_PIX_FMT_NV61:
 784         case V4L2_PIX_FMT_NV42:
 785                 tmp = LDDDSR_LS | LDDDSR_WS;
 786                 break;
 787         case V4L2_PIX_FMT_BGR24:
 788         case V4L2_PIX_FMT_NV12:
 789         case V4L2_PIX_FMT_NV16:
 790         case V4L2_PIX_FMT_NV24:
 791                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
 792                 break;
 793         case V4L2_PIX_FMT_BGR32:
 794         default:
 795                 tmp = LDDDSR_LS;
 796                 break;
 797         }
 798         lcdc_write(priv, _LDDDSR, tmp);
 799
 800         /* Enable the display output. */
 801         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
 802         sh_mobile_lcdc_start_stop(priv, 1);
 803         priv->started = 1;
 804 }
 805
 806 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 807 {
 808         struct sh_mobile_meram_info *mdev = priv->meram_dev;
 809         struct sh_mobile_lcdc_chan *ch;
 810         unsigned long tmp;
 811         int ret;
 812         int k;
 813
 814         /* enable clocks before accessing the hardware */
 815         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 816                 if (priv->ch[k].enabled)
 817                         sh_mobile_lcdc_clk_on(priv);
 818         }
 819
 820         /* reset */
 821         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
 822         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
 823
 824         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 825                 const struct sh_mobile_lcdc_panel_cfg *panel;
 826
 827                 ch = &priv->ch[k];
 828                 if (!ch->enabled)
 829                         continue;
 830
 831                 panel = &ch->cfg->panel_cfg;
 832                 if (panel->setup_sys) {
 833                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
 834                         if (ret)
 835                                 return ret;
 836                 }
 837         }
 838
 839         /* Compute frame buffer base address and pitch for each channel. */
 840         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 841                 int pixelformat;
 842                 void *meram;
 843
 844                 ch = &priv->ch[k];
 845                 if (!ch->enabled)
 846                         continue;
 847
 848                 ch->base_addr_y = ch->dma_handle;
 849                 ch->base_addr_c = ch->base_addr_y + ch->xres * ch->yres_virtual;
 850
 851                 /* Enable MERAM if possible. */
 852                 if (mdev == NULL || mdev->ops == NULL ||
 853                     ch->cfg->meram_cfg == NULL)
 854                         continue;
 855
 856                 /* we need to de-init configured ICBs before we can
 857                  * re-initialize them.
 858                  */
 859                 if (ch->meram) {
 860                         mdev->ops->meram_unregister(mdev, ch->meram);
 861                         ch->meram = NULL;
 862                 }
 863
 864                 switch (ch->format->fourcc) {
 865                 case V4L2_PIX_FMT_NV12:
 866                 case V4L2_PIX_FMT_NV21:
 867                 case V4L2_PIX_FMT_NV16:
 868                 case V4L2_PIX_FMT_NV61:
 869                         pixelformat = SH_MOBILE_MERAM_PF_NV;
 870                         break;
 871                 case V4L2_PIX_FMT_NV24:
 872                 case V4L2_PIX_FMT_NV42:
 873                         pixelformat = SH_MOBILE_MERAM_PF_NV24;
 874                         break;
 875                 case V4L2_PIX_FMT_RGB565:
 876                 case V4L2_PIX_FMT_BGR24:
 877                 case V4L2_PIX_FMT_BGR32:
 878                 default:
 879                         pixelformat = SH_MOBILE_MERAM_PF_RGB;
 880                         break;
 881                 }
 882
 883                 meram = mdev->ops->meram_register(mdev, ch->cfg->meram_cfg,
 884                                         ch->pitch, ch->yres, pixelformat,
 885                                         &ch->pitch);
 886                 if (!IS_ERR(meram)) {
 887                         mdev->ops->meram_update(mdev, meram,
 888                                         ch->base_addr_y, ch->base_addr_c,
 889                                         &ch->base_addr_y, &ch->base_addr_c);
 890                         ch->meram = meram;
 891                 }
 892         }
 893
 894         /* Start the LCDC. */
 895         __sh_mobile_lcdc_start(priv);
 896
 897         /* Setup deferred I/O, tell the board code to enable the panels, and
 898          * turn backlight on.
 899          */
 900         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 901                 ch = &priv->ch[k];
 902                 if (!ch->enabled)
 903                         continue;
 904
 905                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
 906                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
 907                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
 908                         ch->defio.delay = msecs_to_jiffies(tmp);
 909                         ch->info->fbdefio = &ch->defio;
 910                         fb_deferred_io_init(ch->info);
 911                 }
 912
 913                 sh_mobile_lcdc_display_on(ch);
 914
 915                 if (ch->bl) {
 916                         ch->bl->props.power = FB_BLANK_UNBLANK;
 917                         backlight_update_status(ch->bl);
 918                 }
 919         }
 920
 921         return 0;
 922 }
 923
 924 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
 925 {
 926         struct sh_mobile_lcdc_chan *ch;
 927         int k;
 928
 929         /* clean up deferred io and ask board code to disable panel */
 930         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 931                 ch = &priv->ch[k];
 932                 if (!ch->enabled)
 933                         continue;
 934
 935                 /* deferred io mode:
 936                  * flush frame, and wait for frame end interrupt
 937                  * clean up deferred io and enable clock
 938                  */
 939                 if (ch->info && ch->info->fbdefio) {
 940                         ch->frame_end = 0;
 941                         schedule_delayed_work(&ch->info->deferred_work, 0);
 942                         wait_event(ch->frame_end_wait, ch->frame_end);
 943                         fb_deferred_io_cleanup(ch->info);
 944                         ch->info->fbdefio = NULL;
 945                         sh_mobile_lcdc_clk_on(priv);
 946                 }
 947
 948                 if (ch->bl) {
 949                         ch->bl->props.power = FB_BLANK_POWERDOWN;
 950                         backlight_update_status(ch->bl);
 951                 }
 952
 953                 sh_mobile_lcdc_display_off(ch);
 954
 955                 /* disable the meram */
 956                 if (ch->meram) {
 957                         struct sh_mobile_meram_info *mdev;
 958                         mdev = priv->meram_dev;
 959                         mdev->ops->meram_unregister(mdev, ch->meram);
 960                         ch->meram = 0;
 961                 }
 962
 963         }
 964
 965         /* stop the lcdc */
 966         if (priv->started) {
 967                 sh_mobile_lcdc_start_stop(priv, 0);
 968                 priv->started = 0;
 969         }
 970
 971         /* stop clocks */
 972         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 973                 if (priv->ch[k].enabled)
 974                         sh_mobile_lcdc_clk_off(priv);
 975 }
 976
 977 /* -----------------------------------------------------------------------------
 978  * Frame buffer operations
 979  */
 980
 981 static int sh_mobile_lcdc_setcolreg(u_int regno,
 982                                     u_int red, u_int green, u_int blue,
 983                                     u_int transp, struct fb_info *info)
 984 {
 985         u32 *palette = info->pseudo_palette;
 986
 987         if (regno >= PALETTE_NR)
 988                 return -EINVAL;
 989
 990         /* only FB_VISUAL_TRUECOLOR supported */
 991
 992         red >>= 16 - info->var.red.length;
 993         green >>= 16 - info->var.green.length;
 994         blue >>= 16 - info->var.blue.length;
 995         transp >>= 16 - info->var.transp.length;
 996
 997         palette[regno] = (red << info->var.red.offset) |
 998           (green << info->var.green.offset) |
 999           (blue << info->var.blue.offset) |
1000           (transp << info->var.transp.offset);
1001
1002         return 0;
1003 }
1004
1005 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1006         .id =           "SH Mobile LCDC",
1007         .type =         FB_TYPE_PACKED_PIXELS,
1008         .visual =       FB_VISUAL_TRUECOLOR,
1009         .accel =        FB_ACCEL_NONE,
1010         .xpanstep =     0,
1011         .ypanstep =     1,
1012         .ywrapstep =    0,
1013         .capabilities = FB_CAP_FOURCC,
1014 };
1015
1016 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1017                                     const struct fb_fillrect *rect)
1018 {
1019         sys_fillrect(info, rect);
1020         sh_mobile_lcdc_deferred_io_touch(info);
1021 }
1022
1023 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1024                                     const struct fb_copyarea *area)
1025 {
1026         sys_copyarea(info, area);
1027         sh_mobile_lcdc_deferred_io_touch(info);
1028 }
1029
1030 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1031                                      const struct fb_image *image)
1032 {
1033         sys_imageblit(info, image);
1034         sh_mobile_lcdc_deferred_io_touch(info);
1035 }
1036
1037 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
1038                                      struct fb_info *info)
1039 {
1040         struct sh_mobile_lcdc_chan *ch = info->par;
1041         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1042         unsigned long ldrcntr;
1043         unsigned long new_pan_offset;
1044         unsigned long base_addr_y, base_addr_c;
1045         unsigned long c_offset;
1046
1047         if (!ch->format->yuv)
1048                 new_pan_offset = var->yoffset * ch->pitch
1049                                + var->xoffset * (ch->format->bpp / 8);
1050         else
1051                 new_pan_offset = var->yoffset * ch->pitch + var->xoffset;
1052
1053         if (new_pan_offset == ch->pan_offset)
1054                 return 0;       /* No change, do nothing */
1055
1056         ldrcntr = lcdc_read(priv, _LDRCNTR);
1057
1058         /* Set the source address for the next refresh */
1059         base_addr_y = ch->dma_handle + new_pan_offset;
1060         if (ch->format->yuv) {
1061                 /* Set y offset */
1062                 c_offset = var->yoffset * ch->pitch
1063                          * (ch->format->bpp - 8) / 8;
1064                 base_addr_c = ch->dma_handle + ch->xres * ch->yres_virtual
1065                             + c_offset;
1066                 /* Set x offset */
1067                 if (ch->format->fourcc == V4L2_PIX_FMT_NV24)
1068                         base_addr_c += 2 * var->xoffset;
1069                 else
1070                         base_addr_c += var->xoffset;
1071         }
1072
1073         if (ch->meram) {
1074                 struct sh_mobile_meram_info *mdev;
1075
1076                 mdev = priv->meram_dev;
1077                 mdev->ops->meram_update(mdev, ch->meram,
1078                                         base_addr_y, base_addr_c,
1079                                         &base_addr_y, &base_addr_c);
1080         }
1081
1082         ch->base_addr_y = base_addr_y;
1083         ch->base_addr_c = base_addr_c;
1084
1085         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1086         if (ch->format->yuv)
1087                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1088
1089         if (lcdc_chan_is_sublcd(ch))
1090                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1091         else
1092                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1093
1094         ch->pan_offset = new_pan_offset;
1095
1096         sh_mobile_lcdc_deferred_io_touch(info);
1097
1098         return 0;
1099 }
1100
1101 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
1102                        unsigned long arg)
1103 {
1104         int retval;
1105
1106         switch (cmd) {
1107         case FBIO_WAITFORVSYNC:
1108                 retval = sh_mobile_wait_for_vsync(info->par);
1109                 break;
1110
1111         default:
1112                 retval = -ENOIOCTLCMD;
1113                 break;
1114         }
1115         return retval;
1116 }
1117
1118 static void sh_mobile_fb_reconfig(struct fb_info *info)
1119 {
1120         struct sh_mobile_lcdc_chan *ch = info->par;
1121         struct fb_var_screeninfo var;
1122         struct fb_videomode mode;
1123         struct fb_event event;
1124         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1125
1126         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1127                 /* More framebuffer users are active */
1128                 return;
1129
1130         fb_var_to_videomode(&mode, &info->var);
1131
1132         if (fb_mode_is_equal(&ch->display.mode, &mode))
1133                 return;
1134
1135         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1136         var = info->var;
1137         fb_videomode_to_var(&var, &ch->display.mode);
1138         var.width = ch->display.width;
1139         var.height = ch->display.height;
1140         var.activate = FB_ACTIVATE_NOW;
1141
1142         if (fb_set_var(info, &var) < 0)
1143                 /* Couldn't reconfigure, hopefully, can continue as before */
1144                 return;
1145
1146         /*
1147          * fb_set_var() calls the notifier change internally, only if
1148          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1149          * user event, we have to call the chain ourselves.
1150          */
1151         event.info = info;
1152         event.data = &ch->display.mode;
1153         fb_notifier_call_chain(evnt, &event);
1154 }
1155
1156 /*
1157  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1158  * user == 1, or with console sem held, if user == 0.
1159  */
1160 static int sh_mobile_release(struct fb_info *info, int user)
1161 {
1162         struct sh_mobile_lcdc_chan *ch = info->par;
1163
1164         mutex_lock(&ch->open_lock);
1165         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1166
1167         ch->use_count--;
1168
1169         /* Nothing to reconfigure, when called from fbcon */
1170         if (user) {
1171                 console_lock();
1172                 sh_mobile_fb_reconfig(info);
1173                 console_unlock();
1174         }
1175
1176         mutex_unlock(&ch->open_lock);
1177
1178         return 0;
1179 }
1180
1181 static int sh_mobile_open(struct fb_info *info, int user)
1182 {
1183         struct sh_mobile_lcdc_chan *ch = info->par;
1184
1185         mutex_lock(&ch->open_lock);
1186         ch->use_count++;
1187
1188         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1189         mutex_unlock(&ch->open_lock);
1190
1191         return 0;
1192 }
1193
1194 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1195 {
1196         struct sh_mobile_lcdc_chan *ch = info->par;
1197         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1198         unsigned int best_dist = (unsigned int)-1;
1199         unsigned int best_xres = 0;
1200         unsigned int best_yres = 0;
1201         unsigned int i;
1202
1203         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1204                 return -EINVAL;
1205
1206         /* If board code provides us with a list of available modes, make sure
1207          * we use one of them. Find the mode closest to the requested one. The
1208          * distance between two modes is defined as the size of the
1209          * non-overlapping parts of the two rectangles.
1210          */
1211         for (i = 0; i < ch->cfg->num_modes; ++i) {
1212                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1213                 unsigned int dist;
1214
1215                 /* We can only round up. */
1216                 if (var->xres > mode->xres || var->yres > mode->yres)
1217                         continue;
1218
1219                 dist = var->xres * var->yres + mode->xres * mode->yres
1220                      - 2 * min(var->xres, mode->xres)
1221                          * min(var->yres, mode->yres);
1222
1223                 if (dist < best_dist) {
1224                         best_xres = mode->xres;
1225                         best_yres = mode->yres;
1226                         best_dist = dist;
1227                 }
1228         }
1229
1230         /* If no available mode can be used, return an error. */
1231         if (ch->cfg->num_modes != 0) {
1232                 if (best_dist == (unsigned int)-1)
1233                         return -EINVAL;
1234
1235                 var->xres = best_xres;
1236                 var->yres = best_yres;
1237         }
1238
1239         /* Make sure the virtual resolution is at least as big as the visible
1240          * resolution.
1241          */
1242         if (var->xres_virtual < var->xres)
1243                 var->xres_virtual = var->xres;
1244         if (var->yres_virtual < var->yres)
1245                 var->yres_virtual = var->yres;
1246
1247         if (sh_mobile_format_is_fourcc(var)) {
1248                 const struct sh_mobile_lcdc_format_info *format;
1249
1250                 format = sh_mobile_format_info(var->grayscale);
1251                 if (format == NULL)
1252                         return -EINVAL;
1253                 var->bits_per_pixel = format->bpp;
1254
1255                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1256                  * respectively.
1257                  */
1258                 if (!format->yuv)
1259                         var->colorspace = V4L2_COLORSPACE_SRGB;
1260                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1261                         var->colorspace = V4L2_COLORSPACE_JPEG;
1262         } else {
1263                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1264                         var->bits_per_pixel = 16;
1265                         var->red.offset = 11;
1266                         var->red.length = 5;
1267                         var->green.offset = 5;
1268                         var->green.length = 6;
1269                         var->blue.offset = 0;
1270                         var->blue.length = 5;
1271                         var->transp.offset = 0;
1272                         var->transp.length = 0;
1273                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1274                         var->bits_per_pixel = 24;
1275                         var->red.offset = 16;
1276                         var->red.length = 8;
1277                         var->green.offset = 8;
1278                         var->green.length = 8;
1279                         var->blue.offset = 0;
1280                         var->blue.length = 8;
1281                         var->transp.offset = 0;
1282                         var->transp.length = 0;
1283                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1284                         var->bits_per_pixel = 32;
1285                         var->red.offset = 16;
1286                         var->red.length = 8;
1287                         var->green.offset = 8;
1288                         var->green.length = 8;
1289                         var->blue.offset = 0;
1290                         var->blue.length = 8;
1291                         var->transp.offset = 24;
1292                         var->transp.length = 8;
1293                 } else
1294                         return -EINVAL;
1295
1296                 var->red.msb_right = 0;
1297                 var->green.msb_right = 0;
1298                 var->blue.msb_right = 0;
1299                 var->transp.msb_right = 0;
1300         }
1301
1302         /* Make sure we don't exceed our allocated memory. */
1303         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1304             info->fix.smem_len)
1305                 return -EINVAL;
1306
1307         /* only accept the forced_fourcc for dual channel configurations */
1308         if (p->forced_fourcc &&
1309             p->forced_fourcc != sh_mobile_format_fourcc(var))
1310                 return -EINVAL;
1311
1312         return 0;
1313 }
1314
1315 static int sh_mobile_set_par(struct fb_info *info)
1316 {
1317         struct sh_mobile_lcdc_chan *ch = info->par;
1318         int ret;
1319
1320         sh_mobile_lcdc_stop(ch->lcdc);
1321
1322         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1323         ch->colorspace = info->var.colorspace;
1324
1325         ch->xres = info->var.xres;
1326         ch->xres_virtual = info->var.xres_virtual;
1327         ch->yres = info->var.yres;
1328         ch->yres_virtual = info->var.yres_virtual;
1329
1330         if (ch->format->yuv)
1331                 ch->pitch = info->var.xres;
1332         else
1333                 ch->pitch = info->var.xres * ch->format->bpp / 8;
1334
1335         ret = sh_mobile_lcdc_start(ch->lcdc);
1336         if (ret < 0)
1337                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1338
1339         info->fix.line_length = ch->pitch;
1340
1341         if (sh_mobile_format_is_fourcc(&info->var)) {
1342                 info->fix.type = FB_TYPE_FOURCC;
1343                 info->fix.visual = FB_VISUAL_FOURCC;
1344         } else {
1345                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1346                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1347         }
1348
1349         return ret;
1350 }
1351
1352 /*
1353  * Screen blanking. Behavior is as follows:
1354  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1355  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1356  * FB_BLANK_VSYNC,
1357  * FB_BLANK_HSYNC,
1358  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1359  */
1360 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1361 {
1362         struct sh_mobile_lcdc_chan *ch = info->par;
1363         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1364
1365         /* blank the screen? */
1366         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1367                 struct fb_fillrect rect = {
1368                         .width = ch->xres,
1369                         .height = ch->yres,
1370                 };
1371                 sh_mobile_lcdc_fillrect(info, &rect);
1372         }
1373         /* turn clocks on? */
1374         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1375                 sh_mobile_lcdc_clk_on(p);
1376         }
1377         /* turn clocks off? */
1378         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1379                 /* make sure the screen is updated with the black fill before
1380                  * switching the clocks off. one vsync is not enough since
1381                  * blanking may occur in the middle of a refresh. deferred io
1382                  * mode will reenable the clocks and update the screen in time,
1383                  * so it does not need this. */
1384                 if (!info->fbdefio) {
1385                         sh_mobile_wait_for_vsync(ch);
1386                         sh_mobile_wait_for_vsync(ch);
1387                 }
1388                 sh_mobile_lcdc_clk_off(p);
1389         }
1390
1391         ch->blank_status = blank;
1392         return 0;
1393 }
1394
1395 static struct fb_ops sh_mobile_lcdc_ops = {
1396         .owner          = THIS_MODULE,
1397         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
1398         .fb_read        = fb_sys_read,
1399         .fb_write       = fb_sys_write,
1400         .fb_fillrect    = sh_mobile_lcdc_fillrect,
1401         .fb_copyarea    = sh_mobile_lcdc_copyarea,
1402         .fb_imageblit   = sh_mobile_lcdc_imageblit,
1403         .fb_blank       = sh_mobile_lcdc_blank,
1404         .fb_pan_display = sh_mobile_fb_pan_display,
1405         .fb_ioctl       = sh_mobile_ioctl,
1406         .fb_open        = sh_mobile_open,
1407         .fb_release     = sh_mobile_release,
1408         .fb_check_var   = sh_mobile_check_var,
1409         .fb_set_par     = sh_mobile_set_par,
1410 };
1411
1412 static void
1413 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
1414 {
1415         if (ch->info && ch->info->dev)
1416                 unregister_framebuffer(ch->info);
1417 }
1418
1419 static int __devinit
1420 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
1421 {
1422         struct fb_info *info = ch->info;
1423         int ret;
1424
1425         if (info->fbdefio) {
1426                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1427                                      ch->fb_size >> PAGE_SHIFT);
1428                 if (!ch->sglist) {
1429                         dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
1430                         return -ENOMEM;
1431                 }
1432         }
1433
1434         info->bl_dev = ch->bl;
1435
1436         ret = register_framebuffer(info);
1437         if (ret < 0)
1438                 return ret;
1439
1440         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
1441                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
1442                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
1443                  info->var.bits_per_pixel);
1444
1445         /* deferred io mode: disable clock to save power */
1446         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1447                 sh_mobile_lcdc_clk_off(ch->lcdc);
1448
1449         return ret;
1450 }
1451
1452 static void
1453 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
1454 {
1455         struct fb_info *info = ch->info;
1456
1457         if (!info || !info->device)
1458                 return;
1459
1460         if (ch->sglist)
1461                 vfree(ch->sglist);
1462
1463         fb_dealloc_cmap(&info->cmap);
1464         framebuffer_release(info);
1465 }
1466
1467 static int __devinit
1468 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
1469                                const struct fb_videomode *mode,
1470                                unsigned int num_modes)
1471 {
1472         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1473         struct fb_var_screeninfo *var;
1474         struct fb_info *info;
1475         int ret;
1476
1477         /* Allocate and initialize the frame buffer device. Create the modes
1478          * list and allocate the color map.
1479          */
1480         info = framebuffer_alloc(0, priv->dev);
1481         if (info == NULL) {
1482                 dev_err(priv->dev, "unable to allocate fb_info\n");
1483                 return -ENOMEM;
1484         }
1485
1486         ch->info = info;
1487
1488         info->flags = FBINFO_FLAG_DEFAULT;
1489         info->fbops = &sh_mobile_lcdc_ops;
1490         info->device = priv->dev;
1491         info->screen_base = ch->fb_mem;
1492         info->pseudo_palette = &ch->pseudo_palette;
1493         info->par = ch;
1494
1495         fb_videomode_to_modelist(mode, num_modes, &info->modelist);
1496
1497         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1498         if (ret < 0) {
1499                 dev_err(priv->dev, "unable to allocate cmap\n");
1500                 return ret;
1501         }
1502
1503         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1504          * for NV12 and NV21.
1505          */
1506         info->fix = sh_mobile_lcdc_fix;
1507         info->fix.smem_start = ch->dma_handle;
1508         info->fix.smem_len = ch->fb_size;
1509         info->fix.line_length = ch->pitch;
1510
1511         if (ch->format->yuv)
1512                 info->fix.visual = FB_VISUAL_FOURCC;
1513         else
1514                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1515
1516         if (ch->format->fourcc == V4L2_PIX_FMT_NV12 ||
1517             ch->format->fourcc == V4L2_PIX_FMT_NV21)
1518                 info->fix.ypanstep = 2;
1519
1520         /* Initialize variable screen information using the first mode as
1521          * default. The default Y virtual resolution is twice the panel size to
1522          * allow for double-buffering.
1523          */
1524         var = &info->var;
1525         fb_videomode_to_var(var, mode);
1526         var->width = ch->cfg->panel_cfg.width;
1527         var->height = ch->cfg->panel_cfg.height;
1528         var->yres_virtual = var->yres * 2;
1529         var->activate = FB_ACTIVATE_NOW;
1530
1531         /* Use the legacy API by default for RGB formats, and the FOURCC API
1532          * for YUV formats.
1533          */
1534         if (!ch->format->yuv)
1535                 var->bits_per_pixel = ch->format->bpp;
1536         else
1537                 var->grayscale = ch->format->fourcc;
1538
1539         ret = sh_mobile_check_var(var, info);
1540         if (ret)
1541                 return ret;
1542
1543         return 0;
1544 }
1545
1546 /* -----------------------------------------------------------------------------
1547  * Backlight
1548  */
1549
1550 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1551 {
1552         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1553         int brightness = bdev->props.brightness;
1554
1555         if (bdev->props.power != FB_BLANK_UNBLANK ||
1556             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1557                 brightness = 0;
1558
1559         return ch->cfg->bl_info.set_brightness(brightness);
1560 }
1561
1562 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1563 {
1564         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1565
1566         return ch->cfg->bl_info.get_brightness();
1567 }
1568
1569 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1570                                    struct fb_info *info)
1571 {
1572         return (info->bl_dev == bdev);
1573 }
1574
1575 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1576         .options        = BL_CORE_SUSPENDRESUME,
1577         .update_status  = sh_mobile_lcdc_update_bl,
1578         .get_brightness = sh_mobile_lcdc_get_brightness,
1579         .check_fb       = sh_mobile_lcdc_check_fb,
1580 };
1581
1582 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1583                                                struct sh_mobile_lcdc_chan *ch)
1584 {
1585         struct backlight_device *bl;
1586
1587         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
1588                                        &sh_mobile_lcdc_bl_ops, NULL);
1589         if (IS_ERR(bl)) {
1590                 dev_err(parent, "unable to register backlight device: %ld\n",
1591                         PTR_ERR(bl));
1592                 return NULL;
1593         }
1594
1595         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
1596         bl->props.brightness = bl->props.max_brightness;
1597         backlight_update_status(bl);
1598
1599         return bl;
1600 }
1601
1602 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1603 {
1604         backlight_device_unregister(bdev);
1605 }
1606
1607 /* -----------------------------------------------------------------------------
1608  * Power management
1609  */
1610
1611 static int sh_mobile_lcdc_suspend(struct device *dev)
1612 {
1613         struct platform_device *pdev = to_platform_device(dev);
1614
1615         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1616         return 0;
1617 }
1618
1619 static int sh_mobile_lcdc_resume(struct device *dev)
1620 {
1621         struct platform_device *pdev = to_platform_device(dev);
1622
1623         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1624 }
1625
1626 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1627 {
1628         struct platform_device *pdev = to_platform_device(dev);
1629         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1630
1631         /* turn off LCDC hardware */
1632         lcdc_write(priv, _LDCNT1R, 0);
1633
1634         return 0;
1635 }
1636
1637 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1638 {
1639         struct platform_device *pdev = to_platform_device(dev);
1640         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1641
1642         __sh_mobile_lcdc_start(priv);
1643
1644         return 0;
1645 }
1646
1647 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1648         .suspend = sh_mobile_lcdc_suspend,
1649         .resume = sh_mobile_lcdc_resume,
1650         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1651         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1652 };
1653
1654 /* -----------------------------------------------------------------------------
1655  * Framebuffer notifier
1656  */
1657
1658 /* locking: called with info->lock held */
1659 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1660                                  unsigned long action, void *data)
1661 {
1662         struct fb_event *event = data;
1663         struct fb_info *info = event->info;
1664         struct sh_mobile_lcdc_chan *ch = info->par;
1665
1666         if (&ch->lcdc->notifier != nb)
1667                 return NOTIFY_DONE;
1668
1669         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1670                 __func__, action, event->data);
1671
1672         switch(action) {
1673         case FB_EVENT_SUSPEND:
1674                 sh_mobile_lcdc_display_off(ch);
1675                 sh_mobile_lcdc_stop(ch->lcdc);
1676                 break;
1677         case FB_EVENT_RESUME:
1678                 mutex_lock(&ch->open_lock);
1679                 sh_mobile_fb_reconfig(info);
1680                 mutex_unlock(&ch->open_lock);
1681
1682                 sh_mobile_lcdc_display_on(ch);
1683                 sh_mobile_lcdc_start(ch->lcdc);
1684         }
1685
1686         return NOTIFY_OK;
1687 }
1688
1689 /* -----------------------------------------------------------------------------
1690  * Probe/remove and driver init/exit
1691  */
1692
1693 static const struct fb_videomode default_720p __devinitconst = {
1694         .name = "HDMI 720p",
1695         .xres = 1280,
1696         .yres = 720,
1697
1698         .left_margin = 220,
1699         .right_margin = 110,
1700         .hsync_len = 40,
1701
1702         .upper_margin = 20,
1703         .lower_margin = 5,
1704         .vsync_len = 5,
1705
1706         .pixclock = 13468,
1707         .refresh = 60,
1708         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
1709 };
1710
1711 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1712 {
1713         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1714         int i;
1715
1716         fb_unregister_client(&priv->notifier);
1717
1718         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1719                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
1720
1721         sh_mobile_lcdc_stop(priv);
1722
1723         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1724                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
1725
1726                 if (ch->tx_dev) {
1727                         ch->tx_dev->lcdc = NULL;
1728                         module_put(ch->cfg->tx_dev->dev.driver->owner);
1729                 }
1730
1731                 sh_mobile_lcdc_channel_fb_cleanup(ch);
1732
1733                 if (ch->fb_mem)
1734                         dma_free_coherent(&pdev->dev, ch->fb_size,
1735                                           ch->fb_mem, ch->dma_handle);
1736         }
1737
1738         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1739                 if (priv->ch[i].bl)
1740                         sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1741         }
1742
1743         if (priv->dot_clk) {
1744                 pm_runtime_disable(&pdev->dev);
1745                 clk_put(priv->dot_clk);
1746         }
1747
1748         if (priv->base)
1749                 iounmap(priv->base);
1750
1751         if (priv->irq)
1752                 free_irq(priv->irq, priv);
1753         kfree(priv);
1754         return 0;
1755 }
1756
1757 static int __devinit sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
1758 {
1759         int interface_type = ch->cfg->interface_type;
1760
1761         switch (interface_type) {
1762         case RGB8:
1763         case RGB9:
1764         case RGB12A:
1765         case RGB12B:
1766         case RGB16:
1767         case RGB18:
1768         case RGB24:
1769         case SYS8A:
1770         case SYS8B:
1771         case SYS8C:
1772         case SYS8D:
1773         case SYS9:
1774         case SYS12:
1775         case SYS16A:
1776         case SYS16B:
1777         case SYS16C:
1778         case SYS18:
1779         case SYS24:
1780                 break;
1781         default:
1782                 return -EINVAL;
1783         }
1784
1785         /* SUBLCD only supports SYS interface */
1786         if (lcdc_chan_is_sublcd(ch)) {
1787                 if (!(interface_type & LDMT1R_IFM))
1788                         return -EINVAL;
1789
1790                 interface_type &= ~LDMT1R_IFM;
1791         }
1792
1793         ch->ldmt1r_value = interface_type;
1794         return 0;
1795 }
1796
1797 static int __devinit
1798 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_priv *priv,
1799                             struct sh_mobile_lcdc_chan *ch)
1800 {
1801         const struct sh_mobile_lcdc_format_info *format;
1802         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
1803         const struct fb_videomode *max_mode;
1804         const struct fb_videomode *mode;
1805         unsigned int num_modes;
1806         unsigned int max_size;
1807         unsigned int i;
1808
1809         mutex_init(&ch->open_lock);
1810         ch->notify = sh_mobile_lcdc_display_notify;
1811
1812         /* Validate the format. */
1813         format = sh_mobile_format_info(cfg->fourcc);
1814         if (format == NULL) {
1815                 dev_err(priv->dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
1816                 return -EINVAL;
1817         }
1818
1819         /* Iterate through the modes to validate them and find the highest
1820          * resolution.
1821          */
1822         max_mode = NULL;
1823         max_size = 0;
1824
1825         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
1826                 unsigned int size = mode->yres * mode->xres;
1827
1828                 /* NV12/NV21 buffers must have even number of lines */
1829                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
1830                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
1831                         dev_err(priv->dev, "yres must be multiple of 2 for "
1832                                 "YCbCr420 mode.\n");
1833                         return -EINVAL;
1834                 }
1835
1836                 if (size > max_size) {
1837                         max_mode = mode;
1838                         max_size = size;
1839                 }
1840         }
1841
1842         if (!max_size)
1843                 max_size = MAX_XRES * MAX_YRES;
1844         else
1845                 dev_dbg(priv->dev, "Found largest videomode %ux%u\n",
1846                         max_mode->xres, max_mode->yres);
1847
1848         if (cfg->lcd_modes == NULL) {
1849                 mode = &default_720p;
1850                 num_modes = 1;
1851         } else {
1852                 mode = cfg->lcd_modes;
1853                 num_modes = cfg->num_modes;
1854         }
1855
1856         /* Use the first mode as default. */
1857         ch->format = format;
1858         ch->xres = mode->xres;
1859         ch->xres_virtual = mode->xres;
1860         ch->yres = mode->yres;
1861         ch->yres_virtual = mode->yres * 2;
1862
1863         if (!format->yuv) {
1864                 ch->colorspace = V4L2_COLORSPACE_SRGB;
1865                 ch->pitch = ch->xres * format->bpp / 8;
1866         } else {
1867                 ch->colorspace = V4L2_COLORSPACE_REC709;
1868                 ch->pitch = ch->xres;
1869         }
1870
1871         ch->display.width = cfg->panel_cfg.width;
1872         ch->display.height = cfg->panel_cfg.height;
1873         ch->display.mode = *mode;
1874
1875         /* Allocate frame buffer memory. */
1876         ch->fb_size = max_size * format->bpp / 8 * 2;
1877         ch->fb_mem = dma_alloc_coherent(priv->dev, ch->fb_size, &ch->dma_handle,
1878                                         GFP_KERNEL);
1879         if (ch->fb_mem == NULL) {
1880                 dev_err(priv->dev, "unable to allocate buffer\n");
1881                 return -ENOMEM;
1882         }
1883
1884         /* Initialize the transmitter device if present. */
1885         if (cfg->tx_dev) {
1886                 if (!cfg->tx_dev->dev.driver ||
1887                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
1888                         dev_warn(priv->dev,
1889                                  "unable to get transmitter device\n");
1890                         return -EINVAL;
1891                 }
1892                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
1893                 ch->tx_dev->lcdc = ch;
1894                 ch->tx_dev->def_mode = *mode;
1895         }
1896
1897         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
1898 }
1899
1900 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1901 {
1902         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1903         struct sh_mobile_lcdc_priv *priv;
1904         struct resource *res;
1905         int num_channels;
1906         int error;
1907         int i;
1908
1909         if (!pdata) {
1910                 dev_err(&pdev->dev, "no platform data defined\n");
1911                 return -EINVAL;
1912         }
1913
1914         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1915         i = platform_get_irq(pdev, 0);
1916         if (!res || i < 0) {
1917                 dev_err(&pdev->dev, "cannot get platform resources\n");
1918                 return -ENOENT;
1919         }
1920
1921         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1922         if (!priv) {
1923                 dev_err(&pdev->dev, "cannot allocate device data\n");
1924                 return -ENOMEM;
1925         }
1926
1927         priv->dev = &pdev->dev;
1928         priv->meram_dev = pdata->meram_dev;
1929         platform_set_drvdata(pdev, priv);
1930
1931         error = request_irq(i, sh_mobile_lcdc_irq, 0,
1932                             dev_name(&pdev->dev), priv);
1933         if (error) {
1934                 dev_err(&pdev->dev, "unable to request irq\n");
1935                 goto err1;
1936         }
1937
1938         priv->irq = i;
1939         atomic_set(&priv->hw_usecnt, -1);
1940
1941         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1942                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
1943
1944                 ch->lcdc = priv;
1945                 ch->cfg = &pdata->ch[i];
1946
1947                 error = sh_mobile_lcdc_check_interface(ch);
1948                 if (error) {
1949                         dev_err(&pdev->dev, "unsupported interface type\n");
1950                         goto err1;
1951                 }
1952                 init_waitqueue_head(&ch->frame_end_wait);
1953                 init_completion(&ch->vsync_completion);
1954                 ch->pan_offset = 0;
1955
1956                 /* probe the backlight is there is one defined */
1957                 if (ch->cfg->bl_info.max_brightness)
1958                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1959
1960                 switch (pdata->ch[i].chan) {
1961                 case LCDC_CHAN_MAINLCD:
1962                         ch->enabled = LDCNT2R_ME;
1963                         ch->reg_offs = lcdc_offs_mainlcd;
1964                         num_channels++;
1965                         break;
1966                 case LCDC_CHAN_SUBLCD:
1967                         ch->enabled = LDCNT2R_SE;
1968                         ch->reg_offs = lcdc_offs_sublcd;
1969                         num_channels++;
1970                         break;
1971                 }
1972         }
1973
1974         if (!num_channels) {
1975                 dev_err(&pdev->dev, "no channels defined\n");
1976                 error = -EINVAL;
1977                 goto err1;
1978         }
1979
1980         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
1981         if (num_channels == 2)
1982                 priv->forced_fourcc = pdata->ch[0].fourcc;
1983
1984         priv->base = ioremap_nocache(res->start, resource_size(res));
1985         if (!priv->base)
1986                 goto err1;
1987
1988         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
1989         if (error) {
1990                 dev_err(&pdev->dev, "unable to setup clocks\n");
1991                 goto err1;
1992         }
1993
1994         /* Enable runtime PM. */
1995         pm_runtime_enable(&pdev->dev);
1996
1997         for (i = 0; i < num_channels; i++) {
1998                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1999
2000                 error = sh_mobile_lcdc_channel_init(priv, ch);
2001                 if (error)
2002                         goto err1;
2003         }
2004
2005         error = sh_mobile_lcdc_start(priv);
2006         if (error) {
2007                 dev_err(&pdev->dev, "unable to start hardware\n");
2008                 goto err1;
2009         }
2010
2011         for (i = 0; i < num_channels; i++) {
2012                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2013
2014                 error = sh_mobile_lcdc_channel_fb_register(ch);
2015                 if (error)
2016                         goto err1;
2017         }
2018
2019         /* Failure ignored */
2020         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2021         fb_register_client(&priv->notifier);
2022
2023         return 0;
2024 err1:
2025         sh_mobile_lcdc_remove(pdev);
2026
2027         return error;
2028 }
2029
2030 static struct platform_driver sh_mobile_lcdc_driver = {
2031         .driver         = {
2032                 .name           = "sh_mobile_lcdc_fb",
2033                 .owner          = THIS_MODULE,
2034                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2035         },
2036         .probe          = sh_mobile_lcdc_probe,
2037         .remove         = sh_mobile_lcdc_remove,
2038 };
2039
2040 module_platform_driver(sh_mobile_lcdc_driver);
2041
2042 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2043 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2044 MODULE_LICENSE("GPL v2");