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/ctype.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/delay.h>
  18 #include <linux/gpio.h>
  19 #include <linux/init.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mm.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/slab.h>
  28 #include <linux/videodev2.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <video/sh_mobile_lcdc.h>
  32 #include <video/sh_mobile_meram.h>
  33
  34 #include "sh_mobile_lcdcfb.h"
  35
  36 /* ----------------------------------------------------------------------------
  37  * Overlay register definitions
  38  */
  39
  40 #define LDBCR                   0xb00
  41 #define LDBCR_UPC(n)            (1 << ((n) + 16))
  42 #define LDBCR_UPF(n)            (1 << ((n) + 8))
  43 #define LDBCR_UPD(n)            (1 << ((n) + 0))
  44 #define LDBnBSIFR(n)            (0xb20 + (n) * 0x20 + 0x00)
  45 #define LDBBSIFR_EN             (1 << 31)
  46 #define LDBBSIFR_VS             (1 << 29)
  47 #define LDBBSIFR_BRSEL          (1 << 28)
  48 #define LDBBSIFR_MX             (1 << 27)
  49 #define LDBBSIFR_MY             (1 << 26)
  50 #define LDBBSIFR_CV3            (3 << 24)
  51 #define LDBBSIFR_CV2            (2 << 24)
  52 #define LDBBSIFR_CV1            (1 << 24)
  53 #define LDBBSIFR_CV0            (0 << 24)
  54 #define LDBBSIFR_CV_MASK        (3 << 24)
  55 #define LDBBSIFR_LAY_MASK       (0xff << 16)
  56 #define LDBBSIFR_LAY_SHIFT      16
  57 #define LDBBSIFR_ROP3_MASK      (0xff << 16)
  58 #define LDBBSIFR_ROP3_SHIFT     16
  59 #define LDBBSIFR_AL_PL8         (3 << 14)
  60 #define LDBBSIFR_AL_PL1         (2 << 14)
  61 #define LDBBSIFR_AL_PK          (1 << 14)
  62 #define LDBBSIFR_AL_1           (0 << 14)
  63 #define LDBBSIFR_AL_MASK        (3 << 14)
  64 #define LDBBSIFR_SWPL           (1 << 10)
  65 #define LDBBSIFR_SWPW           (1 << 9)
  66 #define LDBBSIFR_SWPB           (1 << 8)
  67 #define LDBBSIFR_RY             (1 << 7)
  68 #define LDBBSIFR_CHRR_420       (2 << 0)
  69 #define LDBBSIFR_CHRR_422       (1 << 0)
  70 #define LDBBSIFR_CHRR_444       (0 << 0)
  71 #define LDBBSIFR_RPKF_ARGB32    (0x00 << 0)
  72 #define LDBBSIFR_RPKF_RGB16     (0x03 << 0)
  73 #define LDBBSIFR_RPKF_RGB24     (0x0b << 0)
  74 #define LDBBSIFR_RPKF_MASK      (0x1f << 0)
  75 #define LDBnBSSZR(n)            (0xb20 + (n) * 0x20 + 0x04)
  76 #define LDBBSSZR_BVSS_MASK      (0xfff << 16)
  77 #define LDBBSSZR_BVSS_SHIFT     16
  78 #define LDBBSSZR_BHSS_MASK      (0xfff << 0)
  79 #define LDBBSSZR_BHSS_SHIFT     0
  80 #define LDBnBLOCR(n)            (0xb20 + (n) * 0x20 + 0x08)
  81 #define LDBBLOCR_CVLC_MASK      (0xfff << 16)
  82 #define LDBBLOCR_CVLC_SHIFT     16
  83 #define LDBBLOCR_CHLC_MASK      (0xfff << 0)
  84 #define LDBBLOCR_CHLC_SHIFT     0
  85 #define LDBnBSMWR(n)            (0xb20 + (n) * 0x20 + 0x0c)
  86 #define LDBBSMWR_BSMWA_MASK     (0xffff << 16)
  87 #define LDBBSMWR_BSMWA_SHIFT    16
  88 #define LDBBSMWR_BSMW_MASK      (0xffff << 0)
  89 #define LDBBSMWR_BSMW_SHIFT     0
  90 #define LDBnBSAYR(n)            (0xb20 + (n) * 0x20 + 0x10)
  91 #define LDBBSAYR_FG1A_MASK      (0xff << 24)
  92 #define LDBBSAYR_FG1A_SHIFT     24
  93 #define LDBBSAYR_FG1R_MASK      (0xff << 16)
  94 #define LDBBSAYR_FG1R_SHIFT     16
  95 #define LDBBSAYR_FG1G_MASK      (0xff << 8)
  96 #define LDBBSAYR_FG1G_SHIFT     8
  97 #define LDBBSAYR_FG1B_MASK      (0xff << 0)
  98 #define LDBBSAYR_FG1B_SHIFT     0
  99 #define LDBnBSACR(n)            (0xb20 + (n) * 0x20 + 0x14)
 100 #define LDBBSACR_FG2A_MASK      (0xff << 24)
 101 #define LDBBSACR_FG2A_SHIFT     24
 102 #define LDBBSACR_FG2R_MASK      (0xff << 16)
 103 #define LDBBSACR_FG2R_SHIFT     16
 104 #define LDBBSACR_FG2G_MASK      (0xff << 8)
 105 #define LDBBSACR_FG2G_SHIFT     8
 106 #define LDBBSACR_FG2B_MASK      (0xff << 0)
 107 #define LDBBSACR_FG2B_SHIFT     0
 108 #define LDBnBSAAR(n)            (0xb20 + (n) * 0x20 + 0x18)
 109 #define LDBBSAAR_AP_MASK        (0xff << 24)
 110 #define LDBBSAAR_AP_SHIFT       24
 111 #define LDBBSAAR_R_MASK         (0xff << 16)
 112 #define LDBBSAAR_R_SHIFT        16
 113 #define LDBBSAAR_GY_MASK        (0xff << 8)
 114 #define LDBBSAAR_GY_SHIFT       8
 115 #define LDBBSAAR_B_MASK         (0xff << 0)
 116 #define LDBBSAAR_B_SHIFT        0
 117 #define LDBnBPPCR(n)            (0xb20 + (n) * 0x20 + 0x1c)
 118 #define LDBBPPCR_AP_MASK        (0xff << 24)
 119 #define LDBBPPCR_AP_SHIFT       24
 120 #define LDBBPPCR_R_MASK         (0xff << 16)
 121 #define LDBBPPCR_R_SHIFT        16
 122 #define LDBBPPCR_GY_MASK        (0xff << 8)
 123 #define LDBBPPCR_GY_SHIFT       8
 124 #define LDBBPPCR_B_MASK         (0xff << 0)
 125 #define LDBBPPCR_B_SHIFT        0
 126 #define LDBnBBGCL(n)            (0xb10 + (n) * 0x04)
 127 #define LDBBBGCL_BGA_MASK       (0xff << 24)
 128 #define LDBBBGCL_BGA_SHIFT      24
 129 #define LDBBBGCL_BGR_MASK       (0xff << 16)
 130 #define LDBBBGCL_BGR_SHIFT      16
 131 #define LDBBBGCL_BGG_MASK       (0xff << 8)
 132 #define LDBBBGCL_BGG_SHIFT      8
 133 #define LDBBBGCL_BGB_MASK       (0xff << 0)
 134 #define LDBBBGCL_BGB_SHIFT      0
 135
 136 #define SIDE_B_OFFSET 0x1000
 137 #define MIRROR_OFFSET 0x2000
 138
 139 #define MAX_XRES 1920
 140 #define MAX_YRES 1080
 141
 142 enum sh_mobile_lcdc_overlay_mode {
 143         LCDC_OVERLAY_BLEND,
 144         LCDC_OVERLAY_ROP3,
 145 };
 146
 147 /*
 148  * struct sh_mobile_lcdc_overlay - LCDC display overlay
 149  *
 150  * @channel: LCDC channel this overlay belongs to
 151  * @cfg: Overlay configuration
 152  * @info: Frame buffer device
 153  * @index: Overlay index (0-3)
 154  * @base: Overlay registers base address
 155  * @enabled: True if the overlay is enabled
 156  * @mode: Overlay blending mode (alpha blend or ROP3)
 157  * @alpha: Global alpha blending value (0-255, for alpha blending mode)
 158  * @rop3: Raster operation (for ROP3 mode)
 159  * @fb_mem: Frame buffer virtual memory address
 160  * @fb_size: Frame buffer size in bytes
 161  * @dma_handle: Frame buffer DMA address
 162  * @base_addr_y: Overlay base address (RGB or luma component)
 163  * @base_addr_c: Overlay base address (chroma component)
 164  * @pan_y_offset: Panning linear offset in bytes (luma component)
 165  * @format: Current pixelf format
 166  * @xres: Horizontal visible resolution
 167  * @xres_virtual: Horizontal total resolution
 168  * @yres: Vertical visible resolution
 169  * @yres_virtual: Vertical total resolution
 170  * @pitch: Overlay line pitch
 171  * @pos_x: Horizontal overlay position
 172  * @pos_y: Vertical overlay position
 173  */
 174 struct sh_mobile_lcdc_overlay {
 175         struct sh_mobile_lcdc_chan *channel;
 176
 177         const struct sh_mobile_lcdc_overlay_cfg *cfg;
 178         struct fb_info *info;
 179
 180         unsigned int index;
 181         unsigned long base;
 182
 183         bool enabled;
 184         enum sh_mobile_lcdc_overlay_mode mode;
 185         unsigned int alpha;
 186         unsigned int rop3;
 187
 188         void *fb_mem;
 189         unsigned long fb_size;
 190
 191         dma_addr_t dma_handle;
 192         unsigned long base_addr_y;
 193         unsigned long base_addr_c;
 194         unsigned long pan_y_offset;
 195
 196         const struct sh_mobile_lcdc_format_info *format;
 197         unsigned int xres;
 198         unsigned int xres_virtual;
 199         unsigned int yres;
 200         unsigned int yres_virtual;
 201         unsigned int pitch;
 202         int pos_x;
 203         int pos_y;
 204 };
 205
 206 struct sh_mobile_lcdc_priv {
 207         void __iomem *base;
 208         int irq;
 209         atomic_t hw_usecnt;
 210         struct device *dev;
 211         struct clk *dot_clk;
 212         unsigned long lddckr;
 213
 214         struct sh_mobile_lcdc_chan ch[2];
 215         struct sh_mobile_lcdc_overlay overlays[4];
 216
 217         struct notifier_block notifier;
 218         int started;
 219         int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 220         struct sh_mobile_meram_info *meram_dev;
 221 };
 222
 223 /* -----------------------------------------------------------------------------
 224  * Registers access
 225  */
 226
 227 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
 228         [LDDCKPAT1R] = 0x400,
 229         [LDDCKPAT2R] = 0x404,
 230         [LDMT1R] = 0x418,
 231         [LDMT2R] = 0x41c,
 232         [LDMT3R] = 0x420,
 233         [LDDFR] = 0x424,
 234         [LDSM1R] = 0x428,
 235         [LDSM2R] = 0x42c,
 236         [LDSA1R] = 0x430,
 237         [LDSA2R] = 0x434,
 238         [LDMLSR] = 0x438,
 239         [LDHCNR] = 0x448,
 240         [LDHSYNR] = 0x44c,
 241         [LDVLNR] = 0x450,
 242         [LDVSYNR] = 0x454,
 243         [LDPMR] = 0x460,
 244         [LDHAJR] = 0x4a0,
 245 };
 246
 247 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 248         [LDDCKPAT1R] = 0x408,
 249         [LDDCKPAT2R] = 0x40c,
 250         [LDMT1R] = 0x600,
 251         [LDMT2R] = 0x604,
 252         [LDMT3R] = 0x608,
 253         [LDDFR] = 0x60c,
 254         [LDSM1R] = 0x610,
 255         [LDSM2R] = 0x614,
 256         [LDSA1R] = 0x618,
 257         [LDMLSR] = 0x620,
 258         [LDHCNR] = 0x624,
 259         [LDHSYNR] = 0x628,
 260         [LDVLNR] = 0x62c,
 261         [LDVSYNR] = 0x630,
 262         [LDPMR] = 0x63c,
 263 };
 264
 265 static bool banked(int reg_nr)
 266 {
 267         switch (reg_nr) {
 268         case LDMT1R:
 269         case LDMT2R:
 270         case LDMT3R:
 271         case LDDFR:
 272         case LDSM1R:
 273         case LDSA1R:
 274         case LDSA2R:
 275         case LDMLSR:
 276         case LDHCNR:
 277         case LDHSYNR:
 278         case LDVLNR:
 279         case LDVSYNR:
 280                 return true;
 281         }
 282         return false;
 283 }
 284
 285 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 286 {
 287         return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 288 }
 289
 290 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 291                             int reg_nr, unsigned long data)
 292 {
 293         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 294         if (banked(reg_nr))
 295                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 296                           SIDE_B_OFFSET);
 297 }
 298
 299 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 300                             int reg_nr, unsigned long data)
 301 {
 302         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 303                   MIRROR_OFFSET);
 304 }
 305
 306 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 307                                     int reg_nr)
 308 {
 309         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 310 }
 311
 312 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
 313                                int reg, unsigned long data)
 314 {
 315         iowrite32(data, ovl->channel->lcdc->base + reg);
 316         iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
 317 }
 318
 319 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 320                        unsigned long reg_offs, unsigned long data)
 321 {
 322         iowrite32(data, priv->base + reg_offs);
 323 }
 324
 325 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 326                                unsigned long reg_offs)
 327 {
 328         return ioread32(priv->base + reg_offs);
 329 }
 330
 331 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 332                           unsigned long reg_offs,
 333                           unsigned long mask, unsigned long until)
 334 {
 335         while ((lcdc_read(priv, reg_offs) & mask) != until)
 336                 cpu_relax();
 337 }
 338
 339 /* -----------------------------------------------------------------------------
 340  * Clock management
 341  */
 342
 343 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 344 {
 345         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 346                 if (priv->dot_clk)
 347                         clk_enable(priv->dot_clk);
 348                 pm_runtime_get_sync(priv->dev);
 349                 if (priv->meram_dev && priv->meram_dev->pdev)
 350                         pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
 351         }
 352 }
 353
 354 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 355 {
 356         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 357                 if (priv->meram_dev && priv->meram_dev->pdev)
 358                         pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
 359                 pm_runtime_put(priv->dev);
 360                 if (priv->dot_clk)
 361                         clk_disable(priv->dot_clk);
 362         }
 363 }
 364
 365 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 366                                        int clock_source)
 367 {
 368         struct clk *clk;
 369         char *str;
 370
 371         switch (clock_source) {
 372         case LCDC_CLK_BUS:
 373                 str = "bus_clk";
 374                 priv->lddckr = LDDCKR_ICKSEL_BUS;
 375                 break;
 376         case LCDC_CLK_PERIPHERAL:
 377                 str = "peripheral_clk";
 378                 priv->lddckr = LDDCKR_ICKSEL_MIPI;
 379                 break;
 380         case LCDC_CLK_EXTERNAL:
 381                 str = NULL;
 382                 priv->lddckr = LDDCKR_ICKSEL_HDMI;
 383                 break;
 384         default:
 385                 return -EINVAL;
 386         }
 387
 388         if (str == NULL)
 389                 return 0;
 390
 391         clk = clk_get(priv->dev, str);
 392         if (IS_ERR(clk)) {
 393                 dev_err(priv->dev, "cannot get dot clock %s\n", str);
 394                 return PTR_ERR(clk);
 395         }
 396
 397         priv->dot_clk = clk;
 398         return 0;
 399 }
 400
 401 /* -----------------------------------------------------------------------------
 402  * Display, panel and deferred I/O
 403  */
 404
 405 static void lcdc_sys_write_index(void *handle, unsigned long data)
 406 {
 407         struct sh_mobile_lcdc_chan *ch = handle;
 408
 409         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 410         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 411         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 412                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 413         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 414 }
 415
 416 static void lcdc_sys_write_data(void *handle, unsigned long data)
 417 {
 418         struct sh_mobile_lcdc_chan *ch = handle;
 419
 420         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 421         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 422         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 423                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 424         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 425 }
 426
 427 static unsigned long lcdc_sys_read_data(void *handle)
 428 {
 429         struct sh_mobile_lcdc_chan *ch = handle;
 430
 431         lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 432         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 433         lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 434                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 435         udelay(1);
 436         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 437
 438         return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 439 }
 440
 441 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 442         lcdc_sys_write_index,
 443         lcdc_sys_write_data,
 444         lcdc_sys_read_data,
 445 };
 446
 447 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 448                                   struct list_head *pagelist)
 449 {
 450         struct sh_mobile_lcdc_chan *ch = info->par;
 451         unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 452         struct page *page;
 453         int nr_pages = 0;
 454
 455         sg_init_table(ch->sglist, nr_pages_max);
 456
 457         list_for_each_entry(page, pagelist, lru)
 458                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 459
 460         return nr_pages;
 461 }
 462
 463 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 464                                        struct list_head *pagelist)
 465 {
 466         struct sh_mobile_lcdc_chan *ch = info->par;
 467         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 468
 469         /* enable clocks before accessing hardware */
 470         sh_mobile_lcdc_clk_on(ch->lcdc);
 471
 472         /*
 473          * It's possible to get here without anything on the pagelist via
 474          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 475          * invocation. In the former case, the acceleration routines are
 476          * stepped in to when using the framebuffer console causing the
 477          * workqueue to be scheduled without any dirty pages on the list.
 478          *
 479          * Despite this, a panel update is still needed given that the
 480          * acceleration routines have their own methods for writing in
 481          * that still need to be updated.
 482          *
 483          * The fsync() and empty pagelist case could be optimized for,
 484          * but we don't bother, as any application exhibiting such
 485          * behaviour is fundamentally broken anyways.
 486          */
 487         if (!list_empty(pagelist)) {
 488                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 489
 490                 /* trigger panel update */
 491                 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 492                 if (panel->start_transfer)
 493                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 494                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 495                 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 496                              DMA_TO_DEVICE);
 497         } else {
 498                 if (panel->start_transfer)
 499                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 500                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 501         }
 502 }
 503
 504 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 505 {
 506         struct fb_deferred_io *fbdefio = info->fbdefio;
 507
 508         if (fbdefio)
 509                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 510 }
 511
 512 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 513 {
 514         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 515
 516         if (ch->tx_dev) {
 517                 int ret;
 518
 519                 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 520                 if (ret < 0)
 521                         return;
 522
 523                 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 524                         ch->info->state = FBINFO_STATE_SUSPENDED;
 525         }
 526
 527         /* HDMI must be enabled before LCDC configuration */
 528         if (panel->display_on)
 529                 panel->display_on();
 530 }
 531
 532 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 533 {
 534         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 535
 536         if (panel->display_off)
 537                 panel->display_off();
 538
 539         if (ch->tx_dev)
 540                 ch->tx_dev->ops->display_off(ch->tx_dev);
 541 }
 542
 543 static bool
 544 sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
 545                                 const struct fb_videomode *new_mode)
 546 {
 547         dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
 548                 ch->display.mode.xres, ch->display.mode.yres,
 549                 new_mode->xres, new_mode->yres);
 550
 551         /* It can be a different monitor with an equal video-mode */
 552         if (fb_mode_is_equal(&ch->display.mode, new_mode))
 553                 return false;
 554
 555         dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
 556                 ch->display.mode.yres, new_mode->yres);
 557         ch->display.mode = *new_mode;
 558
 559         return true;
 560 }
 561
 562 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 563                                     struct fb_info *info);
 564
 565 static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
 566                                          enum sh_mobile_lcdc_entity_event event,
 567                                          const struct fb_videomode *mode,
 568                                          const struct fb_monspecs *monspec)
 569 {
 570         struct fb_info *info = ch->info;
 571         struct fb_var_screeninfo var;
 572         int ret = 0;
 573
 574         switch (event) {
 575         case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
 576                 /* HDMI plug in */
 577                 if (lock_fb_info(info)) {
 578                         console_lock();
 579
 580                         ch->display.width = monspec->max_x * 10;
 581                         ch->display.height = monspec->max_y * 10;
 582
 583                         if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
 584                             info->state == FBINFO_STATE_RUNNING) {
 585                                 /* First activation with the default monitor.
 586                                  * Just turn on, if we run a resume here, the
 587                                  * logo disappears.
 588                                  */
 589                                 info->var.width = monspec->max_x * 10;
 590                                 info->var.height = monspec->max_y * 10;
 591                                 sh_mobile_lcdc_display_on(ch);
 592                         } else {
 593                                 /* New monitor or have to wake up */
 594                                 fb_set_suspend(info, 0);
 595                         }
 596
 597                         console_unlock();
 598                         unlock_fb_info(info);
 599                 }
 600                 break;
 601
 602         case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
 603                 /* HDMI disconnect */
 604                 if (lock_fb_info(info)) {
 605                         console_lock();
 606                         fb_set_suspend(info, 1);
 607                         console_unlock();
 608                         unlock_fb_info(info);
 609                 }
 610                 break;
 611
 612         case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
 613                 /* Validate a proposed new mode */
 614                 fb_videomode_to_var(&var, mode);
 615                 var.bits_per_pixel = info->var.bits_per_pixel;
 616                 var.grayscale = info->var.grayscale;
 617                 ret = sh_mobile_lcdc_check_var(&var, info);
 618                 break;
 619         }
 620
 621         return ret;
 622 }
 623
 624 /* -----------------------------------------------------------------------------
 625  * Format helpers
 626  */
 627
 628 struct sh_mobile_lcdc_format_info {
 629         u32 fourcc;
 630         unsigned int bpp;
 631         bool yuv;
 632         u32 lddfr;
 633 };
 634
 635 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 636         {
 637                 .fourcc = V4L2_PIX_FMT_RGB565,
 638                 .bpp = 16,
 639                 .yuv = false,
 640                 .lddfr = LDDFR_PKF_RGB16,
 641         }, {
 642                 .fourcc = V4L2_PIX_FMT_BGR24,
 643                 .bpp = 24,
 644                 .yuv = false,
 645                 .lddfr = LDDFR_PKF_RGB24,
 646         }, {
 647                 .fourcc = V4L2_PIX_FMT_BGR32,
 648                 .bpp = 32,
 649                 .yuv = false,
 650                 .lddfr = LDDFR_PKF_ARGB32,
 651         }, {
 652                 .fourcc = V4L2_PIX_FMT_NV12,
 653                 .bpp = 12,
 654                 .yuv = true,
 655                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 656         }, {
 657                 .fourcc = V4L2_PIX_FMT_NV21,
 658                 .bpp = 12,
 659                 .yuv = true,
 660                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 661         }, {
 662                 .fourcc = V4L2_PIX_FMT_NV16,
 663                 .bpp = 16,
 664                 .yuv = true,
 665                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 666         }, {
 667                 .fourcc = V4L2_PIX_FMT_NV61,
 668                 .bpp = 16,
 669                 .yuv = true,
 670                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 671         }, {
 672                 .fourcc = V4L2_PIX_FMT_NV24,
 673                 .bpp = 24,
 674                 .yuv = true,
 675                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 676         }, {
 677                 .fourcc = V4L2_PIX_FMT_NV42,
 678                 .bpp = 24,
 679                 .yuv = true,
 680                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 681         },
 682 };
 683
 684 static const struct sh_mobile_lcdc_format_info *
 685 sh_mobile_format_info(u32 fourcc)
 686 {
 687         unsigned int i;
 688
 689         for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 690                 if (sh_mobile_format_infos[i].fourcc == fourcc)
 691                         return &sh_mobile_format_infos[i];
 692         }
 693
 694         return NULL;
 695 }
 696
 697 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 698 {
 699         if (var->grayscale > 1)
 700                 return var->grayscale;
 701
 702         switch (var->bits_per_pixel) {
 703         case 16:
 704                 return V4L2_PIX_FMT_RGB565;
 705         case 24:
 706                 return V4L2_PIX_FMT_BGR24;
 707         case 32:
 708                 return V4L2_PIX_FMT_BGR32;
 709         default:
 710                 return 0;
 711         }
 712 }
 713
 714 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 715 {
 716         return var->grayscale > 1;
 717 }
 718
 719 /* -----------------------------------------------------------------------------
 720  * Start, stop and IRQ
 721  */
 722
 723 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 724 {
 725         struct sh_mobile_lcdc_priv *priv = data;
 726         struct sh_mobile_lcdc_chan *ch;
 727         unsigned long ldintr;
 728         int is_sub;
 729         int k;
 730
 731         /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 732         ldintr = lcdc_read(priv, _LDINTR);
 733         lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 734
 735         /* figure out if this interrupt is for main or sub lcd */
 736         is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 737
 738         /* wake up channel and disable clocks */
 739         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 740                 ch = &priv->ch[k];
 741
 742                 if (!ch->enabled)
 743                         continue;
 744
 745                 /* Frame End */
 746                 if (ldintr & LDINTR_FS) {
 747                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 748                                 ch->frame_end = 1;
 749                                 wake_up(&ch->frame_end_wait);
 750
 751                                 sh_mobile_lcdc_clk_off(priv);
 752                         }
 753                 }
 754
 755                 /* VSYNC End */
 756                 if (ldintr & LDINTR_VES)
 757                         complete(&ch->vsync_completion);
 758         }
 759
 760         return IRQ_HANDLED;
 761 }
 762
 763 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 764 {
 765         unsigned long ldintr;
 766         int ret;
 767
 768         /* Enable VSync End interrupt and be careful not to acknowledge any
 769          * pending interrupt.
 770          */
 771         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 772         ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 773         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 774
 775         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 776                                                         msecs_to_jiffies(100));
 777         if (!ret)
 778                 return -ETIMEDOUT;
 779
 780         return 0;
 781 }
 782
 783 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 784                                       int start)
 785 {
 786         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 787         int k;
 788
 789         /* start or stop the lcdc */
 790         if (start)
 791                 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 792         else
 793                 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 794
 795         /* wait until power is applied/stopped on all channels */
 796         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 797                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 798                         while (1) {
 799                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 800                                     & LDPMR_LPS;
 801                                 if (start && tmp == LDPMR_LPS)
 802                                         break;
 803                                 if (!start && tmp == 0)
 804                                         break;
 805                                 cpu_relax();
 806                         }
 807
 808         if (!start)
 809                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 810 }
 811
 812 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 813 {
 814         const struct fb_var_screeninfo *var = &ch->info->var;
 815         const struct fb_videomode *mode = &ch->display.mode;
 816         unsigned long h_total, hsync_pos, display_h_total;
 817         u32 tmp;
 818
 819         tmp = ch->ldmt1r_value;
 820         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 821         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 822         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 823         tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 824         tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 825         tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 826         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 827         lcdc_write_chan(ch, LDMT1R, tmp);
 828
 829         /* setup SYS bus */
 830         lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 831         lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 832
 833         /* horizontal configuration */
 834         h_total = mode->xres + mode->hsync_len + mode->left_margin
 835                 + mode->right_margin;
 836         tmp = h_total / 8; /* HTCN */
 837         tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 838         lcdc_write_chan(ch, LDHCNR, tmp);
 839
 840         hsync_pos = mode->xres + mode->right_margin;
 841         tmp = hsync_pos / 8; /* HSYNP */
 842         tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 843         lcdc_write_chan(ch, LDHSYNR, tmp);
 844
 845         /* vertical configuration */
 846         tmp = mode->yres + mode->vsync_len + mode->upper_margin
 847             + mode->lower_margin; /* VTLN */
 848         tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 849         lcdc_write_chan(ch, LDVLNR, tmp);
 850
 851         tmp = mode->yres + mode->lower_margin; /* VSYNP */
 852         tmp |= mode->vsync_len << 16; /* VSYNW */
 853         lcdc_write_chan(ch, LDVSYNR, tmp);
 854
 855         /* Adjust horizontal synchronisation for HDMI */
 856         display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 857                         + mode->right_margin;
 858         tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 859             | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 860         lcdc_write_chan(ch, LDHAJR, tmp);
 861 }
 862
 863 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 864 {
 865         u32 format = 0;
 866
 867         if (!ovl->enabled) {
 868                 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 869                 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 870                 lcdc_write(ovl->channel->lcdc, LDBCR,
 871                            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 872                 return;
 873         }
 874
 875         ovl->base_addr_y = ovl->dma_handle;
 876         ovl->base_addr_c = ovl->dma_handle
 877                          + ovl->xres_virtual * ovl->yres_virtual;
 878
 879         switch (ovl->mode) {
 880         case LCDC_OVERLAY_BLEND:
 881                 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 882                 break;
 883
 884         case LCDC_OVERLAY_ROP3:
 885                 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 886                        | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 887                 break;
 888         }
 889
 890         switch (ovl->format->fourcc) {
 891         case V4L2_PIX_FMT_RGB565:
 892         case V4L2_PIX_FMT_NV21:
 893         case V4L2_PIX_FMT_NV61:
 894         case V4L2_PIX_FMT_NV42:
 895                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 896                 break;
 897         case V4L2_PIX_FMT_BGR24:
 898         case V4L2_PIX_FMT_NV12:
 899         case V4L2_PIX_FMT_NV16:
 900         case V4L2_PIX_FMT_NV24:
 901                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 902                 break;
 903         case V4L2_PIX_FMT_BGR32:
 904         default:
 905                 format |= LDBBSIFR_SWPL;
 906                 break;
 907         }
 908
 909         switch (ovl->format->fourcc) {
 910         case V4L2_PIX_FMT_RGB565:
 911                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 912                 break;
 913         case V4L2_PIX_FMT_BGR24:
 914                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 915                 break;
 916         case V4L2_PIX_FMT_BGR32:
 917                 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 918                 break;
 919         case V4L2_PIX_FMT_NV12:
 920         case V4L2_PIX_FMT_NV21:
 921                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 922                 break;
 923         case V4L2_PIX_FMT_NV16:
 924         case V4L2_PIX_FMT_NV61:
 925                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 926                 break;
 927         case V4L2_PIX_FMT_NV24:
 928         case V4L2_PIX_FMT_NV42:
 929                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 930                 break;
 931         }
 932
 933         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 934
 935         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 936
 937         lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 938                 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 939                 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 940         lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 941                 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 942                 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 943         lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 944                 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 945
 946         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 947         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 948
 949         lcdc_write(ovl->channel->lcdc, LDBCR,
 950                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 951 }
 952
 953 /*
 954  * __sh_mobile_lcdc_start - Configure and start the LCDC
 955  * @priv: LCDC device
 956  *
 957  * Configure all enabled channels and start the LCDC device. All external
 958  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 959  */
 960 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 961 {
 962         struct sh_mobile_lcdc_chan *ch;
 963         unsigned long tmp;
 964         int k, m;
 965
 966         /* Enable LCDC channels. Read data from external memory, avoid using the
 967          * BEU for now.
 968          */
 969         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 970
 971         /* Stop the LCDC first and disable all interrupts. */
 972         sh_mobile_lcdc_start_stop(priv, 0);
 973         lcdc_write(priv, _LDINTR, 0);
 974
 975         /* Configure power supply, dot clocks and start them. */
 976         tmp = priv->lddckr;
 977         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 978                 ch = &priv->ch[k];
 979                 if (!ch->enabled)
 980                         continue;
 981
 982                 /* Power supply */
 983                 lcdc_write_chan(ch, LDPMR, 0);
 984
 985                 m = ch->cfg->clock_divider;
 986                 if (!m)
 987                         continue;
 988
 989                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 990                  * denominator.
 991                  */
 992                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 993                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 994
 995                 if (m == 1)
 996                         m = LDDCKR_MOSEL;
 997                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 998         }
 999
1000         lcdc_write(priv, _LDDCKR, tmp);
1001         lcdc_write(priv, _LDDCKSTPR, 0);
1002         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1003
1004         /* Setup geometry, format, frame buffer memory and operation mode. */
1005         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1006                 ch = &priv->ch[k];
1007                 if (!ch->enabled)
1008                         continue;
1009
1010                 sh_mobile_lcdc_geometry(ch);
1011
1012                 tmp = ch->format->lddfr;
1013
1014                 if (ch->format->yuv) {
1015                         switch (ch->colorspace) {
1016                         case V4L2_COLORSPACE_REC709:
1017                                 tmp |= LDDFR_CF1;
1018                                 break;
1019                         case V4L2_COLORSPACE_JPEG:
1020                                 tmp |= LDDFR_CF0;
1021                                 break;
1022                         }
1023                 }
1024
1025                 lcdc_write_chan(ch, LDDFR, tmp);
1026                 lcdc_write_chan(ch, LDMLSR, ch->line_size);
1027                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1028                 if (ch->format->yuv)
1029                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1030
1031                 /* When using deferred I/O mode, configure the LCDC for one-shot
1032                  * operation and enable the frame end interrupt. Otherwise use
1033                  * continuous read mode.
1034                  */
1035                 if (ch->ldmt1r_value & LDMT1R_IFM &&
1036                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
1037                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1038                         lcdc_write(priv, _LDINTR, LDINTR_FE);
1039                 } else {
1040                         lcdc_write_chan(ch, LDSM1R, 0);
1041                 }
1042         }
1043
1044         /* Word and long word swap. */
1045         switch (priv->ch[0].format->fourcc) {
1046         case V4L2_PIX_FMT_RGB565:
1047         case V4L2_PIX_FMT_NV21:
1048         case V4L2_PIX_FMT_NV61:
1049         case V4L2_PIX_FMT_NV42:
1050                 tmp = LDDDSR_LS | LDDDSR_WS;
1051                 break;
1052         case V4L2_PIX_FMT_BGR24:
1053         case V4L2_PIX_FMT_NV12:
1054         case V4L2_PIX_FMT_NV16:
1055         case V4L2_PIX_FMT_NV24:
1056                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1057                 break;
1058         case V4L2_PIX_FMT_BGR32:
1059         default:
1060                 tmp = LDDDSR_LS;
1061                 break;
1062         }
1063         lcdc_write(priv, _LDDDSR, tmp);
1064
1065         /* Enable the display output. */
1066         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1067         sh_mobile_lcdc_start_stop(priv, 1);
1068         priv->started = 1;
1069 }
1070
1071 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1072 {
1073         struct sh_mobile_meram_info *mdev = priv->meram_dev;
1074         struct sh_mobile_lcdc_chan *ch;
1075         unsigned long tmp;
1076         int ret;
1077         int k;
1078
1079         /* enable clocks before accessing the hardware */
1080         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1081                 if (priv->ch[k].enabled)
1082                         sh_mobile_lcdc_clk_on(priv);
1083         }
1084
1085         /* reset */
1086         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1087         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1088
1089         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1090                 const struct sh_mobile_lcdc_panel_cfg *panel;
1091
1092                 ch = &priv->ch[k];
1093                 if (!ch->enabled)
1094                         continue;
1095
1096                 panel = &ch->cfg->panel_cfg;
1097                 if (panel->setup_sys) {
1098                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1099                         if (ret)
1100                                 return ret;
1101                 }
1102         }
1103
1104         /* Compute frame buffer base address and pitch for each channel. */
1105         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1106                 int pixelformat;
1107                 void *cache;
1108
1109                 ch = &priv->ch[k];
1110                 if (!ch->enabled)
1111                         continue;
1112
1113                 ch->base_addr_y = ch->dma_handle;
1114                 ch->base_addr_c = ch->dma_handle
1115                                 + ch->xres_virtual * ch->yres_virtual;
1116                 ch->line_size = ch->pitch;
1117
1118                 /* Enable MERAM if possible. */
1119                 if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1120                         continue;
1121
1122                 /* Free the allocated MERAM cache. */
1123                 if (ch->cache) {
1124                         sh_mobile_meram_cache_free(mdev, ch->cache);
1125                         ch->cache = NULL;
1126                 }
1127
1128                 switch (ch->format->fourcc) {
1129                 case V4L2_PIX_FMT_NV12:
1130                 case V4L2_PIX_FMT_NV21:
1131                 case V4L2_PIX_FMT_NV16:
1132                 case V4L2_PIX_FMT_NV61:
1133                         pixelformat = SH_MOBILE_MERAM_PF_NV;
1134                         break;
1135                 case V4L2_PIX_FMT_NV24:
1136                 case V4L2_PIX_FMT_NV42:
1137                         pixelformat = SH_MOBILE_MERAM_PF_NV24;
1138                         break;
1139                 case V4L2_PIX_FMT_RGB565:
1140                 case V4L2_PIX_FMT_BGR24:
1141                 case V4L2_PIX_FMT_BGR32:
1142                 default:
1143                         pixelformat = SH_MOBILE_MERAM_PF_RGB;
1144                         break;
1145                 }
1146
1147                 cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1148                                         ch->pitch, ch->yres, pixelformat,
1149                                         &ch->line_size);
1150                 if (!IS_ERR(cache)) {
1151                         sh_mobile_meram_cache_update(mdev, cache,
1152                                         ch->base_addr_y, ch->base_addr_c,
1153                                         &ch->base_addr_y, &ch->base_addr_c);
1154                         ch->cache = cache;
1155                 }
1156         }
1157
1158         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1159                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1160                 sh_mobile_lcdc_overlay_setup(ovl);
1161         }
1162
1163         /* Start the LCDC. */
1164         __sh_mobile_lcdc_start(priv);
1165
1166         /* Setup deferred I/O, tell the board code to enable the panels, and
1167          * turn backlight on.
1168          */
1169         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1170                 ch = &priv->ch[k];
1171                 if (!ch->enabled)
1172                         continue;
1173
1174                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1175                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1176                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1177                         ch->defio.delay = msecs_to_jiffies(tmp);
1178                         ch->info->fbdefio = &ch->defio;
1179                         fb_deferred_io_init(ch->info);
1180                 }
1181
1182                 sh_mobile_lcdc_display_on(ch);
1183
1184                 if (ch->bl) {
1185                         ch->bl->props.power = FB_BLANK_UNBLANK;
1186                         backlight_update_status(ch->bl);
1187                 }
1188         }
1189
1190         return 0;
1191 }
1192
1193 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1194 {
1195         struct sh_mobile_lcdc_chan *ch;
1196         int k;
1197
1198         /* clean up deferred io and ask board code to disable panel */
1199         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1200                 ch = &priv->ch[k];
1201                 if (!ch->enabled)
1202                         continue;
1203
1204                 /* deferred io mode:
1205                  * flush frame, and wait for frame end interrupt
1206                  * clean up deferred io and enable clock
1207                  */
1208                 if (ch->info && ch->info->fbdefio) {
1209                         ch->frame_end = 0;
1210                         schedule_delayed_work(&ch->info->deferred_work, 0);
1211                         wait_event(ch->frame_end_wait, ch->frame_end);
1212                         fb_deferred_io_cleanup(ch->info);
1213                         ch->info->fbdefio = NULL;
1214                         sh_mobile_lcdc_clk_on(priv);
1215                 }
1216
1217                 if (ch->bl) {
1218                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1219                         backlight_update_status(ch->bl);
1220                 }
1221
1222                 sh_mobile_lcdc_display_off(ch);
1223
1224                 /* Free the MERAM cache. */
1225                 if (ch->cache) {
1226                         sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1227                         ch->cache = 0;
1228                 }
1229
1230         }
1231
1232         /* stop the lcdc */
1233         if (priv->started) {
1234                 sh_mobile_lcdc_start_stop(priv, 0);
1235                 priv->started = 0;
1236         }
1237
1238         /* stop clocks */
1239         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1240                 if (priv->ch[k].enabled)
1241                         sh_mobile_lcdc_clk_off(priv);
1242 }
1243
1244 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1245                                       struct fb_info *info)
1246 {
1247         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1248                 return -EINVAL;
1249
1250         /* Make sure the virtual resolution is at least as big as the visible
1251          * resolution.
1252          */
1253         if (var->xres_virtual < var->xres)
1254                 var->xres_virtual = var->xres;
1255         if (var->yres_virtual < var->yres)
1256                 var->yres_virtual = var->yres;
1257
1258         if (sh_mobile_format_is_fourcc(var)) {
1259                 const struct sh_mobile_lcdc_format_info *format;
1260
1261                 format = sh_mobile_format_info(var->grayscale);
1262                 if (format == NULL)
1263                         return -EINVAL;
1264                 var->bits_per_pixel = format->bpp;
1265
1266                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1267                  * respectively.
1268                  */
1269                 if (!format->yuv)
1270                         var->colorspace = V4L2_COLORSPACE_SRGB;
1271                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1272                         var->colorspace = V4L2_COLORSPACE_JPEG;
1273         } else {
1274                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1275                         var->bits_per_pixel = 16;
1276                         var->red.offset = 11;
1277                         var->red.length = 5;
1278                         var->green.offset = 5;
1279                         var->green.length = 6;
1280                         var->blue.offset = 0;
1281                         var->blue.length = 5;
1282                         var->transp.offset = 0;
1283                         var->transp.length = 0;
1284                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1285                         var->bits_per_pixel = 24;
1286                         var->red.offset = 16;
1287                         var->red.length = 8;
1288                         var->green.offset = 8;
1289                         var->green.length = 8;
1290                         var->blue.offset = 0;
1291                         var->blue.length = 8;
1292                         var->transp.offset = 0;
1293                         var->transp.length = 0;
1294                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1295                         var->bits_per_pixel = 32;
1296                         var->red.offset = 16;
1297                         var->red.length = 8;
1298                         var->green.offset = 8;
1299                         var->green.length = 8;
1300                         var->blue.offset = 0;
1301                         var->blue.length = 8;
1302                         var->transp.offset = 24;
1303                         var->transp.length = 8;
1304                 } else
1305                         return -EINVAL;
1306
1307                 var->red.msb_right = 0;
1308                 var->green.msb_right = 0;
1309                 var->blue.msb_right = 0;
1310                 var->transp.msb_right = 0;
1311         }
1312
1313         /* Make sure we don't exceed our allocated memory. */
1314         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1315             info->fix.smem_len)
1316                 return -EINVAL;
1317
1318         return 0;
1319 }
1320
1321 /* -----------------------------------------------------------------------------
1322  * Frame buffer operations - Overlays
1323  */
1324
1325 static ssize_t
1326 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1327 {
1328         struct fb_info *info = dev_get_drvdata(dev);
1329         struct sh_mobile_lcdc_overlay *ovl = info->par;
1330
1331         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1332 }
1333
1334 static ssize_t
1335 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1336                     const char *buf, size_t count)
1337 {
1338         struct fb_info *info = dev_get_drvdata(dev);
1339         struct sh_mobile_lcdc_overlay *ovl = info->par;
1340         unsigned int alpha;
1341         char *endp;
1342
1343         alpha = simple_strtoul(buf, &endp, 10);
1344         if (isspace(*endp))
1345                 endp++;
1346
1347         if (endp - buf != count)
1348                 return -EINVAL;
1349
1350         if (alpha > 255)
1351                 return -EINVAL;
1352
1353         if (ovl->alpha != alpha) {
1354                 ovl->alpha = alpha;
1355
1356                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1357                         sh_mobile_lcdc_overlay_setup(ovl);
1358         }
1359
1360         return count;
1361 }
1362
1363 static ssize_t
1364 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1365 {
1366         struct fb_info *info = dev_get_drvdata(dev);
1367         struct sh_mobile_lcdc_overlay *ovl = info->par;
1368
1369         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1370 }
1371
1372 static ssize_t
1373 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1374                    const char *buf, size_t count)
1375 {
1376         struct fb_info *info = dev_get_drvdata(dev);
1377         struct sh_mobile_lcdc_overlay *ovl = info->par;
1378         unsigned int mode;
1379         char *endp;
1380
1381         mode = simple_strtoul(buf, &endp, 10);
1382         if (isspace(*endp))
1383                 endp++;
1384
1385         if (endp - buf != count)
1386                 return -EINVAL;
1387
1388         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1389                 return -EINVAL;
1390
1391         if (ovl->mode != mode) {
1392                 ovl->mode = mode;
1393
1394                 if (ovl->enabled)
1395                         sh_mobile_lcdc_overlay_setup(ovl);
1396         }
1397
1398         return count;
1399 }
1400
1401 static ssize_t
1402 overlay_position_show(struct device *dev, struct device_attribute *attr,
1403                       char *buf)
1404 {
1405         struct fb_info *info = dev_get_drvdata(dev);
1406         struct sh_mobile_lcdc_overlay *ovl = info->par;
1407
1408         return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1409 }
1410
1411 static ssize_t
1412 overlay_position_store(struct device *dev, struct device_attribute *attr,
1413                        const char *buf, size_t count)
1414 {
1415         struct fb_info *info = dev_get_drvdata(dev);
1416         struct sh_mobile_lcdc_overlay *ovl = info->par;
1417         char *endp;
1418         int pos_x;
1419         int pos_y;
1420
1421         pos_x = simple_strtol(buf, &endp, 10);
1422         if (*endp != ',')
1423                 return -EINVAL;
1424
1425         pos_y = simple_strtol(endp + 1, &endp, 10);
1426         if (isspace(*endp))
1427                 endp++;
1428
1429         if (endp - buf != count)
1430                 return -EINVAL;
1431
1432         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1433                 ovl->pos_x = pos_x;
1434                 ovl->pos_y = pos_y;
1435
1436                 if (ovl->enabled)
1437                         sh_mobile_lcdc_overlay_setup(ovl);
1438         }
1439
1440         return count;
1441 }
1442
1443 static ssize_t
1444 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1445 {
1446         struct fb_info *info = dev_get_drvdata(dev);
1447         struct sh_mobile_lcdc_overlay *ovl = info->par;
1448
1449         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1450 }
1451
1452 static ssize_t
1453 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1454                     const char *buf, size_t count)
1455 {
1456         struct fb_info *info = dev_get_drvdata(dev);
1457         struct sh_mobile_lcdc_overlay *ovl = info->par;
1458         unsigned int rop3;
1459         char *endp;
1460
1461         rop3 = !!simple_strtoul(buf, &endp, 10);
1462         if (isspace(*endp))
1463                 endp++;
1464
1465         if (endp - buf != count)
1466                 return -EINVAL;
1467
1468         if (rop3 > 255)
1469                 return -EINVAL;
1470
1471         if (ovl->rop3 != rop3) {
1472                 ovl->rop3 = rop3;
1473
1474                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1475                         sh_mobile_lcdc_overlay_setup(ovl);
1476         }
1477
1478         return count;
1479 }
1480
1481 static const struct device_attribute overlay_sysfs_attrs[] = {
1482         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1483                overlay_alpha_show, overlay_alpha_store),
1484         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1485                overlay_mode_show, overlay_mode_store),
1486         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1487                overlay_position_show, overlay_position_store),
1488         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1489                overlay_rop3_show, overlay_rop3_store),
1490 };
1491
1492 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1493         .id =           "SH Mobile LCDC",
1494         .type =         FB_TYPE_PACKED_PIXELS,
1495         .visual =       FB_VISUAL_TRUECOLOR,
1496         .accel =        FB_ACCEL_NONE,
1497         .xpanstep =     1,
1498         .ypanstep =     1,
1499         .ywrapstep =    0,
1500         .capabilities = FB_CAP_FOURCC,
1501 };
1502
1503 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1504                                     struct fb_info *info)
1505 {
1506         struct sh_mobile_lcdc_overlay *ovl = info->par;
1507         unsigned long base_addr_y;
1508         unsigned long base_addr_c;
1509         unsigned long y_offset;
1510         unsigned long c_offset;
1511
1512         if (!ovl->format->yuv) {
1513                 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1514                          * ovl->format->bpp / 8;
1515                 c_offset = 0;
1516         } else {
1517                 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1518                 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1519
1520                 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1521                 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1522                          + var->xoffset * 2 / xsub;
1523         }
1524
1525         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1526          * nothing to do in that case.
1527          */
1528         if (y_offset == ovl->pan_y_offset)
1529                 return 0;
1530
1531         /* Set the source address for the next refresh */
1532         base_addr_y = ovl->dma_handle + y_offset;
1533         base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1534                     + c_offset;
1535
1536         ovl->base_addr_y = base_addr_y;
1537         ovl->base_addr_c = base_addr_c;
1538         ovl->pan_y_offset = y_offset;
1539
1540         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1541
1542         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1543         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1544
1545         lcdc_write(ovl->channel->lcdc, LDBCR,
1546                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1547
1548         return 0;
1549 }
1550
1551 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1552                                       unsigned long arg)
1553 {
1554         struct sh_mobile_lcdc_overlay *ovl = info->par;
1555
1556         switch (cmd) {
1557         case FBIO_WAITFORVSYNC:
1558                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1559
1560         default:
1561                 return -ENOIOCTLCMD;
1562         }
1563 }
1564
1565 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1566                                           struct fb_info *info)
1567 {
1568         return __sh_mobile_lcdc_check_var(var, info);
1569 }
1570
1571 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1572 {
1573         struct sh_mobile_lcdc_overlay *ovl = info->par;
1574
1575         ovl->format =
1576                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1577
1578         ovl->xres = info->var.xres;
1579         ovl->xres_virtual = info->var.xres_virtual;
1580         ovl->yres = info->var.yres;
1581         ovl->yres_virtual = info->var.yres_virtual;
1582
1583         if (ovl->format->yuv)
1584                 ovl->pitch = info->var.xres_virtual;
1585         else
1586                 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1587
1588         sh_mobile_lcdc_overlay_setup(ovl);
1589
1590         info->fix.line_length = ovl->pitch;
1591
1592         if (sh_mobile_format_is_fourcc(&info->var)) {
1593                 info->fix.type = FB_TYPE_FOURCC;
1594                 info->fix.visual = FB_VISUAL_FOURCC;
1595         } else {
1596                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1597                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1598         }
1599
1600         return 0;
1601 }
1602
1603 /* Overlay blanking. Disable the overlay when blanked. */
1604 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1605 {
1606         struct sh_mobile_lcdc_overlay *ovl = info->par;
1607
1608         ovl->enabled = !blank;
1609         sh_mobile_lcdc_overlay_setup(ovl);
1610
1611         /* Prevent the backlight from receiving a blanking event by returning
1612          * a non-zero value.
1613          */
1614         return 1;
1615 }
1616
1617 static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1618         .owner          = THIS_MODULE,
1619         .fb_read        = fb_sys_read,
1620         .fb_write       = fb_sys_write,
1621         .fb_fillrect    = sys_fillrect,
1622         .fb_copyarea    = sys_copyarea,
1623         .fb_imageblit   = sys_imageblit,
1624         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1625         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1626         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1627         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1628         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1629 };
1630
1631 static void
1632 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1633 {
1634         struct fb_info *info = ovl->info;
1635
1636         if (info == NULL || info->dev == NULL)
1637                 return;
1638
1639         unregister_framebuffer(ovl->info);
1640 }
1641
1642 static int __devinit
1643 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1644 {
1645         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1646         struct fb_info *info = ovl->info;
1647         unsigned int i;
1648         int ret;
1649
1650         if (info == NULL)
1651                 return 0;
1652
1653         ret = register_framebuffer(info);
1654         if (ret < 0)
1655                 return ret;
1656
1657         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1658                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1659                  info->var.yres, info->var.bits_per_pixel);
1660
1661         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1662                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1663                 if (ret < 0)
1664                         return ret;
1665         }
1666
1667         return 0;
1668 }
1669
1670 static void
1671 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1672 {
1673         struct fb_info *info = ovl->info;
1674
1675         if (info == NULL || info->device == NULL)
1676                 return;
1677
1678         framebuffer_release(info);
1679 }
1680
1681 static int __devinit
1682 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1683 {
1684         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1685         struct fb_var_screeninfo *var;
1686         struct fb_info *info;
1687
1688         /* Allocate and initialize the frame buffer device. */
1689         info = framebuffer_alloc(0, priv->dev);
1690         if (info == NULL) {
1691                 dev_err(priv->dev, "unable to allocate fb_info\n");
1692                 return -ENOMEM;
1693         }
1694
1695         ovl->info = info;
1696
1697         info->flags = FBINFO_FLAG_DEFAULT;
1698         info->fbops = &sh_mobile_lcdc_overlay_ops;
1699         info->device = priv->dev;
1700         info->screen_base = ovl->fb_mem;
1701         info->par = ovl;
1702
1703         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1704          * for NV12 and NV21.
1705          */
1706         info->fix = sh_mobile_lcdc_overlay_fix;
1707         snprintf(info->fix.id, sizeof(info->fix.id),
1708                  "SH Mobile LCDC Overlay %u", ovl->index);
1709         info->fix.smem_start = ovl->dma_handle;
1710         info->fix.smem_len = ovl->fb_size;
1711         info->fix.line_length = ovl->pitch;
1712
1713         if (ovl->format->yuv)
1714                 info->fix.visual = FB_VISUAL_FOURCC;
1715         else
1716                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1717
1718         switch (ovl->format->fourcc) {
1719         case V4L2_PIX_FMT_NV12:
1720         case V4L2_PIX_FMT_NV21:
1721                 info->fix.ypanstep = 2;
1722         case V4L2_PIX_FMT_NV16:
1723         case V4L2_PIX_FMT_NV61:
1724                 info->fix.xpanstep = 2;
1725         }
1726
1727         /* Initialize variable screen information. */
1728         var = &info->var;
1729         memset(var, 0, sizeof(*var));
1730         var->xres = ovl->xres;
1731         var->yres = ovl->yres;
1732         var->xres_virtual = ovl->xres_virtual;
1733         var->yres_virtual = ovl->yres_virtual;
1734         var->activate = FB_ACTIVATE_NOW;
1735
1736         /* Use the legacy API by default for RGB formats, and the FOURCC API
1737          * for YUV formats.
1738          */
1739         if (!ovl->format->yuv)
1740                 var->bits_per_pixel = ovl->format->bpp;
1741         else
1742                 var->grayscale = ovl->format->fourcc;
1743
1744         return sh_mobile_lcdc_overlay_check_var(var, info);
1745 }
1746
1747 /* -----------------------------------------------------------------------------
1748  * Frame buffer operations - main frame buffer
1749  */
1750
1751 static int sh_mobile_lcdc_setcolreg(u_int regno,
1752                                     u_int red, u_int green, u_int blue,
1753                                     u_int transp, struct fb_info *info)
1754 {
1755         u32 *palette = info->pseudo_palette;
1756
1757         if (regno >= PALETTE_NR)
1758                 return -EINVAL;
1759
1760         /* only FB_VISUAL_TRUECOLOR supported */
1761
1762         red >>= 16 - info->var.red.length;
1763         green >>= 16 - info->var.green.length;
1764         blue >>= 16 - info->var.blue.length;
1765         transp >>= 16 - info->var.transp.length;
1766
1767         palette[regno] = (red << info->var.red.offset) |
1768           (green << info->var.green.offset) |
1769           (blue << info->var.blue.offset) |
1770           (transp << info->var.transp.offset);
1771
1772         return 0;
1773 }
1774
1775 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1776         .id =           "SH Mobile LCDC",
1777         .type =         FB_TYPE_PACKED_PIXELS,
1778         .visual =       FB_VISUAL_TRUECOLOR,
1779         .accel =        FB_ACCEL_NONE,
1780         .xpanstep =     1,
1781         .ypanstep =     1,
1782         .ywrapstep =    0,
1783         .capabilities = FB_CAP_FOURCC,
1784 };
1785
1786 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1787                                     const struct fb_fillrect *rect)
1788 {
1789         sys_fillrect(info, rect);
1790         sh_mobile_lcdc_deferred_io_touch(info);
1791 }
1792
1793 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1794                                     const struct fb_copyarea *area)
1795 {
1796         sys_copyarea(info, area);
1797         sh_mobile_lcdc_deferred_io_touch(info);
1798 }
1799
1800 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1801                                      const struct fb_image *image)
1802 {
1803         sys_imageblit(info, image);
1804         sh_mobile_lcdc_deferred_io_touch(info);
1805 }
1806
1807 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1808                               struct fb_info *info)
1809 {
1810         struct sh_mobile_lcdc_chan *ch = info->par;
1811         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1812         unsigned long ldrcntr;
1813         unsigned long base_addr_y, base_addr_c;
1814         unsigned long y_offset;
1815         unsigned long c_offset;
1816
1817         if (!ch->format->yuv) {
1818                 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1819                          * ch->format->bpp / 8;
1820                 c_offset = 0;
1821         } else {
1822                 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1823                 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1824
1825                 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1826                 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1827                          + var->xoffset * 2 / xsub;
1828         }
1829
1830         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1831          * nothing to do in that case.
1832          */
1833         if (y_offset == ch->pan_y_offset)
1834                 return 0;
1835
1836         /* Set the source address for the next refresh */
1837         base_addr_y = ch->dma_handle + y_offset;
1838         base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1839                     + c_offset;
1840
1841         if (ch->cache)
1842                 sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1843                                              base_addr_y, base_addr_c,
1844                                              &base_addr_y, &base_addr_c);
1845
1846         ch->base_addr_y = base_addr_y;
1847         ch->base_addr_c = base_addr_c;
1848         ch->pan_y_offset = y_offset;
1849
1850         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1851         if (ch->format->yuv)
1852                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1853
1854         ldrcntr = lcdc_read(priv, _LDRCNTR);
1855         if (lcdc_chan_is_sublcd(ch))
1856                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1857         else
1858                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1859
1860
1861         sh_mobile_lcdc_deferred_io_touch(info);
1862
1863         return 0;
1864 }
1865
1866 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1867                                 unsigned long arg)
1868 {
1869         struct sh_mobile_lcdc_chan *ch = info->par;
1870         int retval;
1871
1872         switch (cmd) {
1873         case FBIO_WAITFORVSYNC:
1874                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1875                 break;
1876
1877         default:
1878                 retval = -ENOIOCTLCMD;
1879                 break;
1880         }
1881         return retval;
1882 }
1883
1884 static void sh_mobile_fb_reconfig(struct fb_info *info)
1885 {
1886         struct sh_mobile_lcdc_chan *ch = info->par;
1887         struct fb_var_screeninfo var;
1888         struct fb_videomode mode;
1889         struct fb_event event;
1890         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1891
1892         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1893                 /* More framebuffer users are active */
1894                 return;
1895
1896         fb_var_to_videomode(&mode, &info->var);
1897
1898         if (fb_mode_is_equal(&ch->display.mode, &mode))
1899                 return;
1900
1901         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1902         var = info->var;
1903         fb_videomode_to_var(&var, &ch->display.mode);
1904         var.width = ch->display.width;
1905         var.height = ch->display.height;
1906         var.activate = FB_ACTIVATE_NOW;
1907
1908         if (fb_set_var(info, &var) < 0)
1909                 /* Couldn't reconfigure, hopefully, can continue as before */
1910                 return;
1911
1912         /*
1913          * fb_set_var() calls the notifier change internally, only if
1914          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1915          * user event, we have to call the chain ourselves.
1916          */
1917         event.info = info;
1918         event.data = &ch->display.mode;
1919         fb_notifier_call_chain(evnt, &event);
1920 }
1921
1922 /*
1923  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1924  * user == 1, or with console sem held, if user == 0.
1925  */
1926 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1927 {
1928         struct sh_mobile_lcdc_chan *ch = info->par;
1929
1930         mutex_lock(&ch->open_lock);
1931         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1932
1933         ch->use_count--;
1934
1935         /* Nothing to reconfigure, when called from fbcon */
1936         if (user) {
1937                 console_lock();
1938                 sh_mobile_fb_reconfig(info);
1939                 console_unlock();
1940         }
1941
1942         mutex_unlock(&ch->open_lock);
1943
1944         return 0;
1945 }
1946
1947 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1948 {
1949         struct sh_mobile_lcdc_chan *ch = info->par;
1950
1951         mutex_lock(&ch->open_lock);
1952         ch->use_count++;
1953
1954         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1955         mutex_unlock(&ch->open_lock);
1956
1957         return 0;
1958 }
1959
1960 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1961                                     struct fb_info *info)
1962 {
1963         struct sh_mobile_lcdc_chan *ch = info->par;
1964         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1965         unsigned int best_dist = (unsigned int)-1;
1966         unsigned int best_xres = 0;
1967         unsigned int best_yres = 0;
1968         unsigned int i;
1969         int ret;
1970
1971         /* If board code provides us with a list of available modes, make sure
1972          * we use one of them. Find the mode closest to the requested one. The
1973          * distance between two modes is defined as the size of the
1974          * non-overlapping parts of the two rectangles.
1975          */
1976         for (i = 0; i < ch->cfg->num_modes; ++i) {
1977                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1978                 unsigned int dist;
1979
1980                 /* We can only round up. */
1981                 if (var->xres > mode->xres || var->yres > mode->yres)
1982                         continue;
1983
1984                 dist = var->xres * var->yres + mode->xres * mode->yres
1985                      - 2 * min(var->xres, mode->xres)
1986                          * min(var->yres, mode->yres);
1987
1988                 if (dist < best_dist) {
1989                         best_xres = mode->xres;
1990                         best_yres = mode->yres;
1991                         best_dist = dist;
1992                 }
1993         }
1994
1995         /* If no available mode can be used, return an error. */
1996         if (ch->cfg->num_modes != 0) {
1997                 if (best_dist == (unsigned int)-1)
1998                         return -EINVAL;
1999
2000                 var->xres = best_xres;
2001                 var->yres = best_yres;
2002         }
2003
2004         ret = __sh_mobile_lcdc_check_var(var, info);
2005         if (ret < 0)
2006                 return ret;
2007
2008         /* only accept the forced_fourcc for dual channel configurations */
2009         if (p->forced_fourcc &&
2010             p->forced_fourcc != sh_mobile_format_fourcc(var))
2011                 return -EINVAL;
2012
2013         return 0;
2014 }
2015
2016 static int sh_mobile_lcdc_set_par(struct fb_info *info)
2017 {
2018         struct sh_mobile_lcdc_chan *ch = info->par;
2019         int ret;
2020
2021         sh_mobile_lcdc_stop(ch->lcdc);
2022
2023         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2024         ch->colorspace = info->var.colorspace;
2025
2026         ch->xres = info->var.xres;
2027         ch->xres_virtual = info->var.xres_virtual;
2028         ch->yres = info->var.yres;
2029         ch->yres_virtual = info->var.yres_virtual;
2030
2031         if (ch->format->yuv)
2032                 ch->pitch = info->var.xres_virtual;
2033         else
2034                 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2035
2036         ret = sh_mobile_lcdc_start(ch->lcdc);
2037         if (ret < 0)
2038                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2039
2040         info->fix.line_length = ch->pitch;
2041
2042         if (sh_mobile_format_is_fourcc(&info->var)) {
2043                 info->fix.type = FB_TYPE_FOURCC;
2044                 info->fix.visual = FB_VISUAL_FOURCC;
2045         } else {
2046                 info->fix.type = FB_TYPE_PACKED_PIXELS;
2047                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2048         }
2049
2050         return ret;
2051 }
2052
2053 /*
2054  * Screen blanking. Behavior is as follows:
2055  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2056  * FB_BLANK_NORMAL: screen blanked, clocks enabled
2057  * FB_BLANK_VSYNC,
2058  * FB_BLANK_HSYNC,
2059  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2060  */
2061 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2062 {
2063         struct sh_mobile_lcdc_chan *ch = info->par;
2064         struct sh_mobile_lcdc_priv *p = ch->lcdc;
2065
2066         /* blank the screen? */
2067         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2068                 struct fb_fillrect rect = {
2069                         .width = ch->xres,
2070                         .height = ch->yres,
2071                 };
2072                 sh_mobile_lcdc_fillrect(info, &rect);
2073         }
2074         /* turn clocks on? */
2075         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2076                 sh_mobile_lcdc_clk_on(p);
2077         }
2078         /* turn clocks off? */
2079         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2080                 /* make sure the screen is updated with the black fill before
2081                  * switching the clocks off. one vsync is not enough since
2082                  * blanking may occur in the middle of a refresh. deferred io
2083                  * mode will reenable the clocks and update the screen in time,
2084                  * so it does not need this. */
2085                 if (!info->fbdefio) {
2086                         sh_mobile_lcdc_wait_for_vsync(ch);
2087                         sh_mobile_lcdc_wait_for_vsync(ch);
2088                 }
2089                 sh_mobile_lcdc_clk_off(p);
2090         }
2091
2092         ch->blank_status = blank;
2093         return 0;
2094 }
2095
2096 static struct fb_ops sh_mobile_lcdc_ops = {
2097         .owner          = THIS_MODULE,
2098         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2099         .fb_read        = fb_sys_read,
2100         .fb_write       = fb_sys_write,
2101         .fb_fillrect    = sh_mobile_lcdc_fillrect,
2102         .fb_copyarea    = sh_mobile_lcdc_copyarea,
2103         .fb_imageblit   = sh_mobile_lcdc_imageblit,
2104         .fb_blank       = sh_mobile_lcdc_blank,
2105         .fb_pan_display = sh_mobile_lcdc_pan,
2106         .fb_ioctl       = sh_mobile_lcdc_ioctl,
2107         .fb_open        = sh_mobile_lcdc_open,
2108         .fb_release     = sh_mobile_lcdc_release,
2109         .fb_check_var   = sh_mobile_lcdc_check_var,
2110         .fb_set_par     = sh_mobile_lcdc_set_par,
2111 };
2112
2113 static void
2114 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2115 {
2116         if (ch->info && ch->info->dev)
2117                 unregister_framebuffer(ch->info);
2118 }
2119
2120 static int __devinit
2121 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2122 {
2123         struct fb_info *info = ch->info;
2124         int ret;
2125
2126         if (info->fbdefio) {
2127                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2128                                      ch->fb_size >> PAGE_SHIFT);
2129                 if (!ch->sglist) {
2130                         dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2131                         return -ENOMEM;
2132                 }
2133         }
2134
2135         info->bl_dev = ch->bl;
2136
2137         ret = register_framebuffer(info);
2138         if (ret < 0)
2139                 return ret;
2140
2141         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2142                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2143                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2144                  info->var.bits_per_pixel);
2145
2146         /* deferred io mode: disable clock to save power */
2147         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2148                 sh_mobile_lcdc_clk_off(ch->lcdc);
2149
2150         return ret;
2151 }
2152
2153 static void
2154 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2155 {
2156         struct fb_info *info = ch->info;
2157
2158         if (!info || !info->device)
2159                 return;
2160
2161         if (ch->sglist)
2162                 vfree(ch->sglist);
2163
2164         fb_dealloc_cmap(&info->cmap);
2165         framebuffer_release(info);
2166 }
2167
2168 static int __devinit
2169 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2170                                const struct fb_videomode *mode,
2171                                unsigned int num_modes)
2172 {
2173         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2174         struct fb_var_screeninfo *var;
2175         struct fb_info *info;
2176         int ret;
2177
2178         /* Allocate and initialize the frame buffer device. Create the modes
2179          * list and allocate the color map.
2180          */
2181         info = framebuffer_alloc(0, priv->dev);
2182         if (info == NULL) {
2183                 dev_err(priv->dev, "unable to allocate fb_info\n");
2184                 return -ENOMEM;
2185         }
2186
2187         ch->info = info;
2188
2189         info->flags = FBINFO_FLAG_DEFAULT;
2190         info->fbops = &sh_mobile_lcdc_ops;
2191         info->device = priv->dev;
2192         info->screen_base = ch->fb_mem;
2193         info->pseudo_palette = &ch->pseudo_palette;
2194         info->par = ch;
2195
2196         fb_videomode_to_modelist(mode, num_modes, &info->modelist);
2197
2198         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2199         if (ret < 0) {
2200                 dev_err(priv->dev, "unable to allocate cmap\n");
2201                 return ret;
2202         }
2203
2204         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2205          * for NV12 and NV21.
2206          */
2207         info->fix = sh_mobile_lcdc_fix;
2208         info->fix.smem_start = ch->dma_handle;
2209         info->fix.smem_len = ch->fb_size;
2210         info->fix.line_length = ch->pitch;
2211
2212         if (ch->format->yuv)
2213                 info->fix.visual = FB_VISUAL_FOURCC;
2214         else
2215                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2216
2217         switch (ch->format->fourcc) {
2218         case V4L2_PIX_FMT_NV12:
2219         case V4L2_PIX_FMT_NV21:
2220                 info->fix.ypanstep = 2;
2221         case V4L2_PIX_FMT_NV16:
2222         case V4L2_PIX_FMT_NV61:
2223                 info->fix.xpanstep = 2;
2224         }
2225
2226         /* Initialize variable screen information using the first mode as
2227          * default.
2228          */
2229         var = &info->var;
2230         fb_videomode_to_var(var, mode);
2231         var->width = ch->cfg->panel_cfg.width;
2232         var->height = ch->cfg->panel_cfg.height;
2233         var->xres_virtual = ch->xres_virtual;
2234         var->yres_virtual = ch->yres_virtual;
2235         var->activate = FB_ACTIVATE_NOW;
2236
2237         /* Use the legacy API by default for RGB formats, and the FOURCC API
2238          * for YUV formats.
2239          */
2240         if (!ch->format->yuv)
2241                 var->bits_per_pixel = ch->format->bpp;
2242         else
2243                 var->grayscale = ch->format->fourcc;
2244
2245         ret = sh_mobile_lcdc_check_var(var, info);
2246         if (ret)
2247                 return ret;
2248
2249         return 0;
2250 }
2251
2252 /* -----------------------------------------------------------------------------
2253  * Backlight
2254  */
2255
2256 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2257 {
2258         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2259         int brightness = bdev->props.brightness;
2260
2261         if (bdev->props.power != FB_BLANK_UNBLANK ||
2262             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2263                 brightness = 0;
2264
2265         return ch->cfg->bl_info.set_brightness(brightness);
2266 }
2267
2268 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2269 {
2270         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2271
2272         return ch->cfg->bl_info.get_brightness();
2273 }
2274
2275 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2276                                    struct fb_info *info)
2277 {
2278         return (info->bl_dev == bdev);
2279 }
2280
2281 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2282         .options        = BL_CORE_SUSPENDRESUME,
2283         .update_status  = sh_mobile_lcdc_update_bl,
2284         .get_brightness = sh_mobile_lcdc_get_brightness,
2285         .check_fb       = sh_mobile_lcdc_check_fb,
2286 };
2287
2288 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2289                                                struct sh_mobile_lcdc_chan *ch)
2290 {
2291         struct backlight_device *bl;
2292
2293         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2294                                        &sh_mobile_lcdc_bl_ops, NULL);
2295         if (IS_ERR(bl)) {
2296                 dev_err(parent, "unable to register backlight device: %ld\n",
2297                         PTR_ERR(bl));
2298                 return NULL;
2299         }
2300
2301         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2302         bl->props.brightness = bl->props.max_brightness;
2303         backlight_update_status(bl);
2304
2305         return bl;
2306 }
2307
2308 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2309 {
2310         backlight_device_unregister(bdev);
2311 }
2312
2313 /* -----------------------------------------------------------------------------
2314  * Power management
2315  */
2316
2317 static int sh_mobile_lcdc_suspend(struct device *dev)
2318 {
2319         struct platform_device *pdev = to_platform_device(dev);
2320
2321         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2322         return 0;
2323 }
2324
2325 static int sh_mobile_lcdc_resume(struct device *dev)
2326 {
2327         struct platform_device *pdev = to_platform_device(dev);
2328
2329         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2330 }
2331
2332 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2333 {
2334         struct platform_device *pdev = to_platform_device(dev);
2335         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2336
2337         /* turn off LCDC hardware */
2338         lcdc_write(priv, _LDCNT1R, 0);
2339
2340         return 0;
2341 }
2342
2343 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2344 {
2345         struct platform_device *pdev = to_platform_device(dev);
2346         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2347
2348         __sh_mobile_lcdc_start(priv);
2349
2350         return 0;
2351 }
2352
2353 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2354         .suspend = sh_mobile_lcdc_suspend,
2355         .resume = sh_mobile_lcdc_resume,
2356         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2357         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2358 };
2359
2360 /* -----------------------------------------------------------------------------
2361  * Framebuffer notifier
2362  */
2363
2364 /* locking: called with info->lock held */
2365 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2366                                  unsigned long action, void *data)
2367 {
2368         struct fb_event *event = data;
2369         struct fb_info *info = event->info;
2370         struct sh_mobile_lcdc_chan *ch = info->par;
2371
2372         if (&ch->lcdc->notifier != nb)
2373                 return NOTIFY_DONE;
2374
2375         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2376                 __func__, action, event->data);
2377
2378         switch(action) {
2379         case FB_EVENT_SUSPEND:
2380                 sh_mobile_lcdc_display_off(ch);
2381                 sh_mobile_lcdc_stop(ch->lcdc);
2382                 break;
2383         case FB_EVENT_RESUME:
2384                 mutex_lock(&ch->open_lock);
2385                 sh_mobile_fb_reconfig(info);
2386                 mutex_unlock(&ch->open_lock);
2387
2388                 sh_mobile_lcdc_display_on(ch);
2389                 sh_mobile_lcdc_start(ch->lcdc);
2390         }
2391
2392         return NOTIFY_OK;
2393 }
2394
2395 /* -----------------------------------------------------------------------------
2396  * Probe/remove and driver init/exit
2397  */
2398
2399 static const struct fb_videomode default_720p __devinitconst = {
2400         .name = "HDMI 720p",
2401         .xres = 1280,
2402         .yres = 720,
2403
2404         .left_margin = 220,
2405         .right_margin = 110,
2406         .hsync_len = 40,
2407
2408         .upper_margin = 20,
2409         .lower_margin = 5,
2410         .vsync_len = 5,
2411
2412         .pixclock = 13468,
2413         .refresh = 60,
2414         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2415 };
2416
2417 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2418 {
2419         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2420         unsigned int i;
2421
2422         fb_unregister_client(&priv->notifier);
2423
2424         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2425                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2426         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2427                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2428
2429         sh_mobile_lcdc_stop(priv);
2430
2431         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2432                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2433
2434                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2435
2436                 if (ovl->fb_mem)
2437                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2438                                           ovl->fb_mem, ovl->dma_handle);
2439         }
2440
2441         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2442                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2443
2444                 if (ch->tx_dev) {
2445                         ch->tx_dev->lcdc = NULL;
2446                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2447                 }
2448
2449                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2450
2451                 if (ch->fb_mem)
2452                         dma_free_coherent(&pdev->dev, ch->fb_size,
2453                                           ch->fb_mem, ch->dma_handle);
2454         }
2455
2456         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2457                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2458
2459                 if (ch->bl)
2460                         sh_mobile_lcdc_bl_remove(ch->bl);
2461                 mutex_destroy(&ch->open_lock);
2462         }
2463
2464         if (priv->dot_clk) {
2465                 pm_runtime_disable(&pdev->dev);
2466                 clk_put(priv->dot_clk);
2467         }
2468
2469         if (priv->base)
2470                 iounmap(priv->base);
2471
2472         if (priv->irq)
2473                 free_irq(priv->irq, priv);
2474         kfree(priv);
2475         return 0;
2476 }
2477
2478 static int __devinit sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2479 {
2480         int interface_type = ch->cfg->interface_type;
2481
2482         switch (interface_type) {
2483         case RGB8:
2484         case RGB9:
2485         case RGB12A:
2486         case RGB12B:
2487         case RGB16:
2488         case RGB18:
2489         case RGB24:
2490         case SYS8A:
2491         case SYS8B:
2492         case SYS8C:
2493         case SYS8D:
2494         case SYS9:
2495         case SYS12:
2496         case SYS16A:
2497         case SYS16B:
2498         case SYS16C:
2499         case SYS18:
2500         case SYS24:
2501                 break;
2502         default:
2503                 return -EINVAL;
2504         }
2505
2506         /* SUBLCD only supports SYS interface */
2507         if (lcdc_chan_is_sublcd(ch)) {
2508                 if (!(interface_type & LDMT1R_IFM))
2509                         return -EINVAL;
2510
2511                 interface_type &= ~LDMT1R_IFM;
2512         }
2513
2514         ch->ldmt1r_value = interface_type;
2515         return 0;
2516 }
2517
2518 static int __devinit
2519 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_priv *priv,
2520                           struct sh_mobile_lcdc_overlay *ovl)
2521 {
2522         const struct sh_mobile_lcdc_format_info *format;
2523         int ret;
2524
2525         if (ovl->cfg->fourcc == 0)
2526                 return 0;
2527
2528         /* Validate the format. */
2529         format = sh_mobile_format_info(ovl->cfg->fourcc);
2530         if (format == NULL) {
2531                 dev_err(priv->dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2532                 return -EINVAL;
2533         }
2534
2535         ovl->enabled = false;
2536         ovl->mode = LCDC_OVERLAY_BLEND;
2537         ovl->alpha = 255;
2538         ovl->rop3 = 0;
2539         ovl->pos_x = 0;
2540         ovl->pos_y = 0;
2541
2542         /* The default Y virtual resolution is twice the panel size to allow for
2543          * double-buffering.
2544          */
2545         ovl->format = format;
2546         ovl->xres = ovl->cfg->max_xres;
2547         ovl->xres_virtual = ovl->xres;
2548         ovl->yres = ovl->cfg->max_yres;
2549         ovl->yres_virtual = ovl->yres * 2;
2550
2551         if (!format->yuv)
2552                 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2553         else
2554                 ovl->pitch = ovl->xres_virtual;
2555
2556         /* Allocate frame buffer memory. */
2557         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2558                        * format->bpp / 8 * 2;
2559         ovl->fb_mem = dma_alloc_coherent(priv->dev, ovl->fb_size,
2560                                            &ovl->dma_handle, GFP_KERNEL);
2561         if (!ovl->fb_mem) {
2562                 dev_err(priv->dev, "unable to allocate buffer\n");
2563                 return -ENOMEM;
2564         }
2565
2566         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2567         if (ret < 0)
2568                 return ret;
2569
2570         return 0;
2571 }
2572
2573 static int __devinit
2574 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_priv *priv,
2575                             struct sh_mobile_lcdc_chan *ch)
2576 {
2577         const struct sh_mobile_lcdc_format_info *format;
2578         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2579         const struct fb_videomode *max_mode;
2580         const struct fb_videomode *mode;
2581         unsigned int num_modes;
2582         unsigned int max_size;
2583         unsigned int i;
2584
2585         mutex_init(&ch->open_lock);
2586         ch->notify = sh_mobile_lcdc_display_notify;
2587
2588         /* Validate the format. */
2589         format = sh_mobile_format_info(cfg->fourcc);
2590         if (format == NULL) {
2591                 dev_err(priv->dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2592                 return -EINVAL;
2593         }
2594
2595         /* Iterate through the modes to validate them and find the highest
2596          * resolution.
2597          */
2598         max_mode = NULL;
2599         max_size = 0;
2600
2601         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2602                 unsigned int size = mode->yres * mode->xres;
2603
2604                 /* NV12/NV21 buffers must have even number of lines */
2605                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2606                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2607                         dev_err(priv->dev, "yres must be multiple of 2 for "
2608                                 "YCbCr420 mode.\n");
2609                         return -EINVAL;
2610                 }
2611
2612                 if (size > max_size) {
2613                         max_mode = mode;
2614                         max_size = size;
2615                 }
2616         }
2617
2618         if (!max_size)
2619                 max_size = MAX_XRES * MAX_YRES;
2620         else
2621                 dev_dbg(priv->dev, "Found largest videomode %ux%u\n",
2622                         max_mode->xres, max_mode->yres);
2623
2624         if (cfg->lcd_modes == NULL) {
2625                 mode = &default_720p;
2626                 num_modes = 1;
2627         } else {
2628                 mode = cfg->lcd_modes;
2629                 num_modes = cfg->num_modes;
2630         }
2631
2632         /* Use the first mode as default. The default Y virtual resolution is
2633          * twice the panel size to allow for double-buffering.
2634          */
2635         ch->format = format;
2636         ch->xres = mode->xres;
2637         ch->xres_virtual = mode->xres;
2638         ch->yres = mode->yres;
2639         ch->yres_virtual = mode->yres * 2;
2640
2641         if (!format->yuv) {
2642                 ch->colorspace = V4L2_COLORSPACE_SRGB;
2643                 ch->pitch = ch->xres_virtual * format->bpp / 8;
2644         } else {
2645                 ch->colorspace = V4L2_COLORSPACE_REC709;
2646                 ch->pitch = ch->xres_virtual;
2647         }
2648
2649         ch->display.width = cfg->panel_cfg.width;
2650         ch->display.height = cfg->panel_cfg.height;
2651         ch->display.mode = *mode;
2652
2653         /* Allocate frame buffer memory. */
2654         ch->fb_size = max_size * format->bpp / 8 * 2;
2655         ch->fb_mem = dma_alloc_coherent(priv->dev, ch->fb_size, &ch->dma_handle,
2656                                         GFP_KERNEL);
2657         if (ch->fb_mem == NULL) {
2658                 dev_err(priv->dev, "unable to allocate buffer\n");
2659                 return -ENOMEM;
2660         }
2661
2662         /* Initialize the transmitter device if present. */
2663         if (cfg->tx_dev) {
2664                 if (!cfg->tx_dev->dev.driver ||
2665                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2666                         dev_warn(priv->dev,
2667                                  "unable to get transmitter device\n");
2668                         return -EINVAL;
2669                 }
2670                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2671                 ch->tx_dev->lcdc = ch;
2672                 ch->tx_dev->def_mode = *mode;
2673         }
2674
2675         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2676 }
2677
2678 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
2679 {
2680         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2681         struct sh_mobile_lcdc_priv *priv;
2682         struct resource *res;
2683         int num_channels;
2684         int error;
2685         int i;
2686
2687         if (!pdata) {
2688                 dev_err(&pdev->dev, "no platform data defined\n");
2689                 return -EINVAL;
2690         }
2691
2692         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2693         i = platform_get_irq(pdev, 0);
2694         if (!res || i < 0) {
2695                 dev_err(&pdev->dev, "cannot get platform resources\n");
2696                 return -ENOENT;
2697         }
2698
2699         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2700         if (!priv) {
2701                 dev_err(&pdev->dev, "cannot allocate device data\n");
2702                 return -ENOMEM;
2703         }
2704
2705         priv->dev = &pdev->dev;
2706         priv->meram_dev = pdata->meram_dev;
2707         platform_set_drvdata(pdev, priv);
2708
2709         error = request_irq(i, sh_mobile_lcdc_irq, 0,
2710                             dev_name(&pdev->dev), priv);
2711         if (error) {
2712                 dev_err(&pdev->dev, "unable to request irq\n");
2713                 goto err1;
2714         }
2715
2716         priv->irq = i;
2717         atomic_set(&priv->hw_usecnt, -1);
2718
2719         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2720                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2721
2722                 ch->lcdc = priv;
2723                 ch->cfg = &pdata->ch[i];
2724
2725                 error = sh_mobile_lcdc_check_interface(ch);
2726                 if (error) {
2727                         dev_err(&pdev->dev, "unsupported interface type\n");
2728                         goto err1;
2729                 }
2730                 init_waitqueue_head(&ch->frame_end_wait);
2731                 init_completion(&ch->vsync_completion);
2732
2733                 /* probe the backlight is there is one defined */
2734                 if (ch->cfg->bl_info.max_brightness)
2735                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2736
2737                 switch (pdata->ch[i].chan) {
2738                 case LCDC_CHAN_MAINLCD:
2739                         ch->enabled = LDCNT2R_ME;
2740                         ch->reg_offs = lcdc_offs_mainlcd;
2741                         num_channels++;
2742                         break;
2743                 case LCDC_CHAN_SUBLCD:
2744                         ch->enabled = LDCNT2R_SE;
2745                         ch->reg_offs = lcdc_offs_sublcd;
2746                         num_channels++;
2747                         break;
2748                 }
2749         }
2750
2751         if (!num_channels) {
2752                 dev_err(&pdev->dev, "no channels defined\n");
2753                 error = -EINVAL;
2754                 goto err1;
2755         }
2756
2757         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2758         if (num_channels == 2)
2759                 priv->forced_fourcc = pdata->ch[0].fourcc;
2760
2761         priv->base = ioremap_nocache(res->start, resource_size(res));
2762         if (!priv->base)
2763                 goto err1;
2764
2765         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2766         if (error) {
2767                 dev_err(&pdev->dev, "unable to setup clocks\n");
2768                 goto err1;
2769         }
2770
2771         /* Enable runtime PM. */
2772         pm_runtime_enable(&pdev->dev);
2773
2774         for (i = 0; i < num_channels; i++) {
2775                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2776
2777                 error = sh_mobile_lcdc_channel_init(priv, ch);
2778                 if (error)
2779                         goto err1;
2780         }
2781
2782         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2783                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2784
2785                 ovl->cfg = &pdata->overlays[i];
2786                 ovl->channel = &priv->ch[0];
2787
2788                 error = sh_mobile_lcdc_overlay_init(priv, ovl);
2789                 if (error)
2790                         goto err1;
2791         }
2792
2793         error = sh_mobile_lcdc_start(priv);
2794         if (error) {
2795                 dev_err(&pdev->dev, "unable to start hardware\n");
2796                 goto err1;
2797         }
2798
2799         for (i = 0; i < num_channels; i++) {
2800                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2801
2802                 error = sh_mobile_lcdc_channel_fb_register(ch);
2803                 if (error)
2804                         goto err1;
2805         }
2806
2807         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2808                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2809
2810                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2811                 if (error)
2812                         goto err1;
2813         }
2814
2815         /* Failure ignored */
2816         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2817         fb_register_client(&priv->notifier);
2818
2819         return 0;
2820 err1:
2821         sh_mobile_lcdc_remove(pdev);
2822
2823         return error;
2824 }
2825
2826 static struct platform_driver sh_mobile_lcdc_driver = {
2827         .driver         = {
2828                 .name           = "sh_mobile_lcdc_fb",
2829                 .owner          = THIS_MODULE,
2830                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2831         },
2832         .probe          = sh_mobile_lcdc_probe,
2833         .remove         = sh_mobile_lcdc_remove,
2834 };
2835
2836 module_platform_driver(sh_mobile_lcdc_driver);
2837
2838 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2839 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2840 MODULE_LICENSE("GPL v2");