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_offset: Current pan offset in bytes
 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_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->base_addr_y + ovl->xres
 877                            * 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->base_addr_y + ch->xres * ch->yres_virtual;
1115                 ch->line_size = ch->pitch;
1116
1117                 /* Enable MERAM if possible. */
1118                 if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1119                         continue;
1120
1121                 /* Free the allocated MERAM cache. */
1122                 if (ch->cache) {
1123                         sh_mobile_meram_cache_free(mdev, ch->cache);
1124                         ch->cache = NULL;
1125                 }
1126
1127                 switch (ch->format->fourcc) {
1128                 case V4L2_PIX_FMT_NV12:
1129                 case V4L2_PIX_FMT_NV21:
1130                 case V4L2_PIX_FMT_NV16:
1131                 case V4L2_PIX_FMT_NV61:
1132                         pixelformat = SH_MOBILE_MERAM_PF_NV;
1133                         break;
1134                 case V4L2_PIX_FMT_NV24:
1135                 case V4L2_PIX_FMT_NV42:
1136                         pixelformat = SH_MOBILE_MERAM_PF_NV24;
1137                         break;
1138                 case V4L2_PIX_FMT_RGB565:
1139                 case V4L2_PIX_FMT_BGR24:
1140                 case V4L2_PIX_FMT_BGR32:
1141                 default:
1142                         pixelformat = SH_MOBILE_MERAM_PF_RGB;
1143                         break;
1144                 }
1145
1146                 cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1147                                         ch->pitch, ch->yres, pixelformat,
1148                                         &ch->line_size);
1149                 if (!IS_ERR(cache)) {
1150                         sh_mobile_meram_cache_update(mdev, cache,
1151                                         ch->base_addr_y, ch->base_addr_c,
1152                                         &ch->base_addr_y, &ch->base_addr_c);
1153                         ch->cache = cache;
1154                 }
1155         }
1156
1157         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1158                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1159                 sh_mobile_lcdc_overlay_setup(ovl);
1160         }
1161
1162         /* Start the LCDC. */
1163         __sh_mobile_lcdc_start(priv);
1164
1165         /* Setup deferred I/O, tell the board code to enable the panels, and
1166          * turn backlight on.
1167          */
1168         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1169                 ch = &priv->ch[k];
1170                 if (!ch->enabled)
1171                         continue;
1172
1173                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1174                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1175                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1176                         ch->defio.delay = msecs_to_jiffies(tmp);
1177                         ch->info->fbdefio = &ch->defio;
1178                         fb_deferred_io_init(ch->info);
1179                 }
1180
1181                 sh_mobile_lcdc_display_on(ch);
1182
1183                 if (ch->bl) {
1184                         ch->bl->props.power = FB_BLANK_UNBLANK;
1185                         backlight_update_status(ch->bl);
1186                 }
1187         }
1188
1189         return 0;
1190 }
1191
1192 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1193 {
1194         struct sh_mobile_lcdc_chan *ch;
1195         int k;
1196
1197         /* clean up deferred io and ask board code to disable panel */
1198         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1199                 ch = &priv->ch[k];
1200                 if (!ch->enabled)
1201                         continue;
1202
1203                 /* deferred io mode:
1204                  * flush frame, and wait for frame end interrupt
1205                  * clean up deferred io and enable clock
1206                  */
1207                 if (ch->info && ch->info->fbdefio) {
1208                         ch->frame_end = 0;
1209                         schedule_delayed_work(&ch->info->deferred_work, 0);
1210                         wait_event(ch->frame_end_wait, ch->frame_end);
1211                         fb_deferred_io_cleanup(ch->info);
1212                         ch->info->fbdefio = NULL;
1213                         sh_mobile_lcdc_clk_on(priv);
1214                 }
1215
1216                 if (ch->bl) {
1217                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1218                         backlight_update_status(ch->bl);
1219                 }
1220
1221                 sh_mobile_lcdc_display_off(ch);
1222
1223                 /* Free the MERAM cache. */
1224                 if (ch->cache) {
1225                         sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1226                         ch->cache = 0;
1227                 }
1228
1229         }
1230
1231         /* stop the lcdc */
1232         if (priv->started) {
1233                 sh_mobile_lcdc_start_stop(priv, 0);
1234                 priv->started = 0;
1235         }
1236
1237         /* stop clocks */
1238         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1239                 if (priv->ch[k].enabled)
1240                         sh_mobile_lcdc_clk_off(priv);
1241 }
1242
1243 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1244                                       struct fb_info *info)
1245 {
1246         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1247                 return -EINVAL;
1248
1249         /* Make sure the virtual resolution is at least as big as the visible
1250          * resolution.
1251          */
1252         if (var->xres_virtual < var->xres)
1253                 var->xres_virtual = var->xres;
1254         if (var->yres_virtual < var->yres)
1255                 var->yres_virtual = var->yres;
1256
1257         if (sh_mobile_format_is_fourcc(var)) {
1258                 const struct sh_mobile_lcdc_format_info *format;
1259
1260                 format = sh_mobile_format_info(var->grayscale);
1261                 if (format == NULL)
1262                         return -EINVAL;
1263                 var->bits_per_pixel = format->bpp;
1264
1265                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1266                  * respectively.
1267                  */
1268                 if (!format->yuv)
1269                         var->colorspace = V4L2_COLORSPACE_SRGB;
1270                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1271                         var->colorspace = V4L2_COLORSPACE_JPEG;
1272         } else {
1273                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1274                         var->bits_per_pixel = 16;
1275                         var->red.offset = 11;
1276                         var->red.length = 5;
1277                         var->green.offset = 5;
1278                         var->green.length = 6;
1279                         var->blue.offset = 0;
1280                         var->blue.length = 5;
1281                         var->transp.offset = 0;
1282                         var->transp.length = 0;
1283                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1284                         var->bits_per_pixel = 24;
1285                         var->red.offset = 16;
1286                         var->red.length = 8;
1287                         var->green.offset = 8;
1288                         var->green.length = 8;
1289                         var->blue.offset = 0;
1290                         var->blue.length = 8;
1291                         var->transp.offset = 0;
1292                         var->transp.length = 0;
1293                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1294                         var->bits_per_pixel = 32;
1295                         var->red.offset = 16;
1296                         var->red.length = 8;
1297                         var->green.offset = 8;
1298                         var->green.length = 8;
1299                         var->blue.offset = 0;
1300                         var->blue.length = 8;
1301                         var->transp.offset = 24;
1302                         var->transp.length = 8;
1303                 } else
1304                         return -EINVAL;
1305
1306                 var->red.msb_right = 0;
1307                 var->green.msb_right = 0;
1308                 var->blue.msb_right = 0;
1309                 var->transp.msb_right = 0;
1310         }
1311
1312         /* Make sure we don't exceed our allocated memory. */
1313         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1314             info->fix.smem_len)
1315                 return -EINVAL;
1316
1317         return 0;
1318 }
1319
1320 /* -----------------------------------------------------------------------------
1321  * Frame buffer operations - Overlays
1322  */
1323
1324 static ssize_t
1325 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1326 {
1327         struct fb_info *info = dev_get_drvdata(dev);
1328         struct sh_mobile_lcdc_overlay *ovl = info->par;
1329
1330         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1331 }
1332
1333 static ssize_t
1334 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1335                     const char *buf, size_t count)
1336 {
1337         struct fb_info *info = dev_get_drvdata(dev);
1338         struct sh_mobile_lcdc_overlay *ovl = info->par;
1339         unsigned int alpha;
1340         char *endp;
1341
1342         alpha = simple_strtoul(buf, &endp, 10);
1343         if (isspace(*endp))
1344                 endp++;
1345
1346         if (endp - buf != count)
1347                 return -EINVAL;
1348
1349         if (alpha > 255)
1350                 return -EINVAL;
1351
1352         if (ovl->alpha != alpha) {
1353                 ovl->alpha = alpha;
1354
1355                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1356                         sh_mobile_lcdc_overlay_setup(ovl);
1357         }
1358
1359         return count;
1360 }
1361
1362 static ssize_t
1363 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1364 {
1365         struct fb_info *info = dev_get_drvdata(dev);
1366         struct sh_mobile_lcdc_overlay *ovl = info->par;
1367
1368         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1369 }
1370
1371 static ssize_t
1372 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1373                    const char *buf, size_t count)
1374 {
1375         struct fb_info *info = dev_get_drvdata(dev);
1376         struct sh_mobile_lcdc_overlay *ovl = info->par;
1377         unsigned int mode;
1378         char *endp;
1379
1380         mode = simple_strtoul(buf, &endp, 10);
1381         if (isspace(*endp))
1382                 endp++;
1383
1384         if (endp - buf != count)
1385                 return -EINVAL;
1386
1387         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1388                 return -EINVAL;
1389
1390         if (ovl->mode != mode) {
1391                 ovl->mode = mode;
1392
1393                 if (ovl->enabled)
1394                         sh_mobile_lcdc_overlay_setup(ovl);
1395         }
1396
1397         return count;
1398 }
1399
1400 static ssize_t
1401 overlay_position_show(struct device *dev, struct device_attribute *attr,
1402                       char *buf)
1403 {
1404         struct fb_info *info = dev_get_drvdata(dev);
1405         struct sh_mobile_lcdc_overlay *ovl = info->par;
1406
1407         return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1408 }
1409
1410 static ssize_t
1411 overlay_position_store(struct device *dev, struct device_attribute *attr,
1412                        const char *buf, size_t count)
1413 {
1414         struct fb_info *info = dev_get_drvdata(dev);
1415         struct sh_mobile_lcdc_overlay *ovl = info->par;
1416         char *endp;
1417         int pos_x;
1418         int pos_y;
1419
1420         pos_x = simple_strtol(buf, &endp, 10);
1421         if (*endp != ',')
1422                 return -EINVAL;
1423
1424         pos_y = simple_strtol(endp + 1, &endp, 10);
1425         if (isspace(*endp))
1426                 endp++;
1427
1428         if (endp - buf != count)
1429                 return -EINVAL;
1430
1431         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1432                 ovl->pos_x = pos_x;
1433                 ovl->pos_y = pos_y;
1434
1435                 if (ovl->enabled)
1436                         sh_mobile_lcdc_overlay_setup(ovl);
1437         }
1438
1439         return count;
1440 }
1441
1442 static ssize_t
1443 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1444 {
1445         struct fb_info *info = dev_get_drvdata(dev);
1446         struct sh_mobile_lcdc_overlay *ovl = info->par;
1447
1448         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1449 }
1450
1451 static ssize_t
1452 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1453                     const char *buf, size_t count)
1454 {
1455         struct fb_info *info = dev_get_drvdata(dev);
1456         struct sh_mobile_lcdc_overlay *ovl = info->par;
1457         unsigned int rop3;
1458         char *endp;
1459
1460         rop3 = !!simple_strtoul(buf, &endp, 10);
1461         if (isspace(*endp))
1462                 endp++;
1463
1464         if (endp - buf != count)
1465                 return -EINVAL;
1466
1467         if (rop3 > 255)
1468                 return -EINVAL;
1469
1470         if (ovl->rop3 != rop3) {
1471                 ovl->rop3 = rop3;
1472
1473                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1474                         sh_mobile_lcdc_overlay_setup(ovl);
1475         }
1476
1477         return count;
1478 }
1479
1480 static const struct device_attribute overlay_sysfs_attrs[] = {
1481         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1482                overlay_alpha_show, overlay_alpha_store),
1483         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1484                overlay_mode_show, overlay_mode_store),
1485         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1486                overlay_position_show, overlay_position_store),
1487         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1488                overlay_rop3_show, overlay_rop3_store),
1489 };
1490
1491 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1492         .id =           "SH Mobile LCDC",
1493         .type =         FB_TYPE_PACKED_PIXELS,
1494         .visual =       FB_VISUAL_TRUECOLOR,
1495         .accel =        FB_ACCEL_NONE,
1496         .xpanstep =     0,
1497         .ypanstep =     1,
1498         .ywrapstep =    0,
1499         .capabilities = FB_CAP_FOURCC,
1500 };
1501
1502 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1503                                     struct fb_info *info)
1504 {
1505         struct sh_mobile_lcdc_overlay *ovl = info->par;
1506         unsigned long base_addr_y;
1507         unsigned long base_addr_c;
1508         unsigned long pan_offset;
1509         unsigned long c_offset;
1510
1511         if (!ovl->format->yuv)
1512                 pan_offset = var->yoffset * ovl->pitch
1513                            + var->xoffset * (ovl->format->bpp / 8);
1514         else
1515                 pan_offset = var->yoffset * ovl->pitch + var->xoffset;
1516
1517         if (pan_offset == ovl->pan_offset)
1518                 return 0;       /* No change, do nothing */
1519
1520         /* Set the source address for the next refresh */
1521         base_addr_y = ovl->dma_handle + pan_offset;
1522
1523         ovl->base_addr_y = base_addr_y;
1524         ovl->base_addr_c = base_addr_y;
1525
1526         if (ovl->format->yuv) {
1527                 /* Set Y offset */
1528                 c_offset = var->yoffset * ovl->pitch
1529                          * (ovl->format->bpp - 8) / 8;
1530                 base_addr_c = ovl->dma_handle
1531                             + ovl->xres * ovl->yres_virtual
1532                             + c_offset;
1533                 /* Set X offset */
1534                 if (ovl->format->fourcc == V4L2_PIX_FMT_NV24)
1535                         base_addr_c += 2 * var->xoffset;
1536                 else
1537                         base_addr_c += var->xoffset;
1538
1539                 ovl->base_addr_c = base_addr_c;
1540         }
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         ovl->pan_offset = pan_offset;
1546
1547         return 0;
1548 }
1549
1550 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1551                                       unsigned long arg)
1552 {
1553         struct sh_mobile_lcdc_overlay *ovl = info->par;
1554
1555         switch (cmd) {
1556         case FBIO_WAITFORVSYNC:
1557                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1558
1559         default:
1560                 return -ENOIOCTLCMD;
1561         }
1562 }
1563
1564 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1565                                           struct fb_info *info)
1566 {
1567         return __sh_mobile_lcdc_check_var(var, info);
1568 }
1569
1570 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1571 {
1572         struct sh_mobile_lcdc_overlay *ovl = info->par;
1573
1574         ovl->format =
1575                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1576
1577         ovl->xres = info->var.xres;
1578         ovl->xres_virtual = info->var.xres_virtual;
1579         ovl->yres = info->var.yres;
1580         ovl->yres_virtual = info->var.yres_virtual;
1581
1582         if (ovl->format->yuv)
1583                 ovl->pitch = info->var.xres;
1584         else
1585                 ovl->pitch = info->var.xres * ovl->format->bpp / 8;
1586
1587         sh_mobile_lcdc_overlay_setup(ovl);
1588
1589         info->fix.line_length = ovl->pitch;
1590
1591         if (sh_mobile_format_is_fourcc(&info->var)) {
1592                 info->fix.type = FB_TYPE_FOURCC;
1593                 info->fix.visual = FB_VISUAL_FOURCC;
1594         } else {
1595                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1596                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1597         }
1598
1599         return 0;
1600 }
1601
1602 /* Overlay blanking. Disable the overlay when blanked. */
1603 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1604 {
1605         struct sh_mobile_lcdc_overlay *ovl = info->par;
1606
1607         ovl->enabled = !blank;
1608         sh_mobile_lcdc_overlay_setup(ovl);
1609
1610         /* Prevent the backlight from receiving a blanking event by returning
1611          * a non-zero value.
1612          */
1613         return 1;
1614 }
1615
1616 static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1617         .owner          = THIS_MODULE,
1618         .fb_read        = fb_sys_read,
1619         .fb_write       = fb_sys_write,
1620         .fb_fillrect    = sys_fillrect,
1621         .fb_copyarea    = sys_copyarea,
1622         .fb_imageblit   = sys_imageblit,
1623         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1624         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1625         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1626         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1627         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1628 };
1629
1630 static void
1631 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1632 {
1633         struct fb_info *info = ovl->info;
1634
1635         if (info == NULL || info->dev == NULL)
1636                 return;
1637
1638         unregister_framebuffer(ovl->info);
1639 }
1640
1641 static int __devinit
1642 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1643 {
1644         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1645         struct fb_info *info = ovl->info;
1646         unsigned int i;
1647         int ret;
1648
1649         if (info == NULL)
1650                 return 0;
1651
1652         ret = register_framebuffer(info);
1653         if (ret < 0)
1654                 return ret;
1655
1656         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1657                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1658                  info->var.yres, info->var.bits_per_pixel);
1659
1660         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1661                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1662                 if (ret < 0)
1663                         return ret;
1664         }
1665
1666         return 0;
1667 }
1668
1669 static void
1670 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1671 {
1672         struct fb_info *info = ovl->info;
1673
1674         if (info == NULL || info->device == NULL)
1675                 return;
1676
1677         framebuffer_release(info);
1678 }
1679
1680 static int __devinit
1681 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1682 {
1683         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1684         struct fb_var_screeninfo *var;
1685         struct fb_info *info;
1686
1687         /* Allocate and initialize the frame buffer device. */
1688         info = framebuffer_alloc(0, priv->dev);
1689         if (info == NULL) {
1690                 dev_err(priv->dev, "unable to allocate fb_info\n");
1691                 return -ENOMEM;
1692         }
1693
1694         ovl->info = info;
1695
1696         info->flags = FBINFO_FLAG_DEFAULT;
1697         info->fbops = &sh_mobile_lcdc_overlay_ops;
1698         info->device = priv->dev;
1699         info->screen_base = ovl->fb_mem;
1700         info->par = ovl;
1701
1702         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1703          * for NV12 and NV21.
1704          */
1705         info->fix = sh_mobile_lcdc_overlay_fix;
1706         snprintf(info->fix.id, sizeof(info->fix.id),
1707                  "SH Mobile LCDC Overlay %u", ovl->index);
1708         info->fix.smem_start = ovl->dma_handle;
1709         info->fix.smem_len = ovl->fb_size;
1710         info->fix.line_length = ovl->pitch;
1711
1712         if (ovl->format->yuv)
1713                 info->fix.visual = FB_VISUAL_FOURCC;
1714         else
1715                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1716
1717         if (ovl->format->fourcc == V4L2_PIX_FMT_NV12 ||
1718             ovl->format->fourcc == V4L2_PIX_FMT_NV21)
1719                 info->fix.ypanstep = 2;
1720
1721         /* Initialize variable screen information. */
1722         var = &info->var;
1723         memset(var, 0, sizeof(*var));
1724         var->xres = ovl->xres;
1725         var->yres = ovl->yres;
1726         var->xres_virtual = ovl->xres_virtual;
1727         var->yres_virtual = ovl->yres_virtual;
1728         var->activate = FB_ACTIVATE_NOW;
1729
1730         /* Use the legacy API by default for RGB formats, and the FOURCC API
1731          * for YUV formats.
1732          */
1733         if (!ovl->format->yuv)
1734                 var->bits_per_pixel = ovl->format->bpp;
1735         else
1736                 var->grayscale = ovl->format->fourcc;
1737
1738         return sh_mobile_lcdc_overlay_check_var(var, info);
1739 }
1740
1741 /* -----------------------------------------------------------------------------
1742  * Frame buffer operations - main frame buffer
1743  */
1744
1745 static int sh_mobile_lcdc_setcolreg(u_int regno,
1746                                     u_int red, u_int green, u_int blue,
1747                                     u_int transp, struct fb_info *info)
1748 {
1749         u32 *palette = info->pseudo_palette;
1750
1751         if (regno >= PALETTE_NR)
1752                 return -EINVAL;
1753
1754         /* only FB_VISUAL_TRUECOLOR supported */
1755
1756         red >>= 16 - info->var.red.length;
1757         green >>= 16 - info->var.green.length;
1758         blue >>= 16 - info->var.blue.length;
1759         transp >>= 16 - info->var.transp.length;
1760
1761         palette[regno] = (red << info->var.red.offset) |
1762           (green << info->var.green.offset) |
1763           (blue << info->var.blue.offset) |
1764           (transp << info->var.transp.offset);
1765
1766         return 0;
1767 }
1768
1769 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1770         .id =           "SH Mobile LCDC",
1771         .type =         FB_TYPE_PACKED_PIXELS,
1772         .visual =       FB_VISUAL_TRUECOLOR,
1773         .accel =        FB_ACCEL_NONE,
1774         .xpanstep =     0,
1775         .ypanstep =     1,
1776         .ywrapstep =    0,
1777         .capabilities = FB_CAP_FOURCC,
1778 };
1779
1780 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1781                                     const struct fb_fillrect *rect)
1782 {
1783         sys_fillrect(info, rect);
1784         sh_mobile_lcdc_deferred_io_touch(info);
1785 }
1786
1787 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1788                                     const struct fb_copyarea *area)
1789 {
1790         sys_copyarea(info, area);
1791         sh_mobile_lcdc_deferred_io_touch(info);
1792 }
1793
1794 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1795                                      const struct fb_image *image)
1796 {
1797         sys_imageblit(info, image);
1798         sh_mobile_lcdc_deferred_io_touch(info);
1799 }
1800
1801 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1802                               struct fb_info *info)
1803 {
1804         struct sh_mobile_lcdc_chan *ch = info->par;
1805         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1806         unsigned long ldrcntr;
1807         unsigned long new_pan_offset;
1808         unsigned long base_addr_y, base_addr_c = 0;
1809         unsigned long c_offset;
1810
1811         if (!ch->format->yuv)
1812                 new_pan_offset = var->yoffset * ch->pitch
1813                                + var->xoffset * (ch->format->bpp / 8);
1814         else
1815                 new_pan_offset = var->yoffset * ch->pitch + var->xoffset;
1816
1817         if (new_pan_offset == ch->pan_offset)
1818                 return 0;       /* No change, do nothing */
1819
1820         ldrcntr = lcdc_read(priv, _LDRCNTR);
1821
1822         /* Set the source address for the next refresh */
1823         base_addr_y = ch->dma_handle + new_pan_offset;
1824         if (ch->format->yuv) {
1825                 /* Set y offset */
1826                 c_offset = var->yoffset * ch->pitch
1827                          * (ch->format->bpp - 8) / 8;
1828                 base_addr_c = ch->dma_handle + ch->xres * ch->yres_virtual
1829                             + c_offset;
1830                 /* Set x offset */
1831                 if (ch->format->fourcc == V4L2_PIX_FMT_NV24)
1832                         base_addr_c += 2 * var->xoffset;
1833                 else
1834                         base_addr_c += var->xoffset;
1835         }
1836
1837         if (ch->cache)
1838                 sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1839                                              base_addr_y, base_addr_c,
1840                                              &base_addr_y, &base_addr_c);
1841
1842         ch->base_addr_y = base_addr_y;
1843         ch->base_addr_c = base_addr_c;
1844
1845         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1846         if (ch->format->yuv)
1847                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1848
1849         if (lcdc_chan_is_sublcd(ch))
1850                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1851         else
1852                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1853
1854         ch->pan_offset = new_pan_offset;
1855
1856         sh_mobile_lcdc_deferred_io_touch(info);
1857
1858         return 0;
1859 }
1860
1861 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1862                                 unsigned long arg)
1863 {
1864         struct sh_mobile_lcdc_chan *ch = info->par;
1865         int retval;
1866
1867         switch (cmd) {
1868         case FBIO_WAITFORVSYNC:
1869                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1870                 break;
1871
1872         default:
1873                 retval = -ENOIOCTLCMD;
1874                 break;
1875         }
1876         return retval;
1877 }
1878
1879 static void sh_mobile_fb_reconfig(struct fb_info *info)
1880 {
1881         struct sh_mobile_lcdc_chan *ch = info->par;
1882         struct fb_var_screeninfo var;
1883         struct fb_videomode mode;
1884         struct fb_event event;
1885         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1886
1887         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1888                 /* More framebuffer users are active */
1889                 return;
1890
1891         fb_var_to_videomode(&mode, &info->var);
1892
1893         if (fb_mode_is_equal(&ch->display.mode, &mode))
1894                 return;
1895
1896         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1897         var = info->var;
1898         fb_videomode_to_var(&var, &ch->display.mode);
1899         var.width = ch->display.width;
1900         var.height = ch->display.height;
1901         var.activate = FB_ACTIVATE_NOW;
1902
1903         if (fb_set_var(info, &var) < 0)
1904                 /* Couldn't reconfigure, hopefully, can continue as before */
1905                 return;
1906
1907         /*
1908          * fb_set_var() calls the notifier change internally, only if
1909          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1910          * user event, we have to call the chain ourselves.
1911          */
1912         event.info = info;
1913         event.data = &ch->display.mode;
1914         fb_notifier_call_chain(evnt, &event);
1915 }
1916
1917 /*
1918  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1919  * user == 1, or with console sem held, if user == 0.
1920  */
1921 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1922 {
1923         struct sh_mobile_lcdc_chan *ch = info->par;
1924
1925         mutex_lock(&ch->open_lock);
1926         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1927
1928         ch->use_count--;
1929
1930         /* Nothing to reconfigure, when called from fbcon */
1931         if (user) {
1932                 console_lock();
1933                 sh_mobile_fb_reconfig(info);
1934                 console_unlock();
1935         }
1936
1937         mutex_unlock(&ch->open_lock);
1938
1939         return 0;
1940 }
1941
1942 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1943 {
1944         struct sh_mobile_lcdc_chan *ch = info->par;
1945
1946         mutex_lock(&ch->open_lock);
1947         ch->use_count++;
1948
1949         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1950         mutex_unlock(&ch->open_lock);
1951
1952         return 0;
1953 }
1954
1955 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1956                                     struct fb_info *info)
1957 {
1958         struct sh_mobile_lcdc_chan *ch = info->par;
1959         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1960         unsigned int best_dist = (unsigned int)-1;
1961         unsigned int best_xres = 0;
1962         unsigned int best_yres = 0;
1963         unsigned int i;
1964         int ret;
1965
1966         /* If board code provides us with a list of available modes, make sure
1967          * we use one of them. Find the mode closest to the requested one. The
1968          * distance between two modes is defined as the size of the
1969          * non-overlapping parts of the two rectangles.
1970          */
1971         for (i = 0; i < ch->cfg->num_modes; ++i) {
1972                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1973                 unsigned int dist;
1974
1975                 /* We can only round up. */
1976                 if (var->xres > mode->xres || var->yres > mode->yres)
1977                         continue;
1978
1979                 dist = var->xres * var->yres + mode->xres * mode->yres
1980                      - 2 * min(var->xres, mode->xres)
1981                          * min(var->yres, mode->yres);
1982
1983                 if (dist < best_dist) {
1984                         best_xres = mode->xres;
1985                         best_yres = mode->yres;
1986                         best_dist = dist;
1987                 }
1988         }
1989
1990         /* If no available mode can be used, return an error. */
1991         if (ch->cfg->num_modes != 0) {
1992                 if (best_dist == (unsigned int)-1)
1993                         return -EINVAL;
1994
1995                 var->xres = best_xres;
1996                 var->yres = best_yres;
1997         }
1998
1999         ret = __sh_mobile_lcdc_check_var(var, info);
2000         if (ret < 0)
2001                 return ret;
2002
2003         /* only accept the forced_fourcc for dual channel configurations */
2004         if (p->forced_fourcc &&
2005             p->forced_fourcc != sh_mobile_format_fourcc(var))
2006                 return -EINVAL;
2007
2008         return 0;
2009 }
2010
2011 static int sh_mobile_lcdc_set_par(struct fb_info *info)
2012 {
2013         struct sh_mobile_lcdc_chan *ch = info->par;
2014         int ret;
2015
2016         sh_mobile_lcdc_stop(ch->lcdc);
2017
2018         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2019         ch->colorspace = info->var.colorspace;
2020
2021         ch->xres = info->var.xres;
2022         ch->xres_virtual = info->var.xres_virtual;
2023         ch->yres = info->var.yres;
2024         ch->yres_virtual = info->var.yres_virtual;
2025
2026         if (ch->format->yuv)
2027                 ch->pitch = info->var.xres;
2028         else
2029                 ch->pitch = info->var.xres * ch->format->bpp / 8;
2030
2031         ret = sh_mobile_lcdc_start(ch->lcdc);
2032         if (ret < 0)
2033                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2034
2035         info->fix.line_length = ch->pitch;
2036
2037         if (sh_mobile_format_is_fourcc(&info->var)) {
2038                 info->fix.type = FB_TYPE_FOURCC;
2039                 info->fix.visual = FB_VISUAL_FOURCC;
2040         } else {
2041                 info->fix.type = FB_TYPE_PACKED_PIXELS;
2042                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2043         }
2044
2045         return ret;
2046 }
2047
2048 /*
2049  * Screen blanking. Behavior is as follows:
2050  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2051  * FB_BLANK_NORMAL: screen blanked, clocks enabled
2052  * FB_BLANK_VSYNC,
2053  * FB_BLANK_HSYNC,
2054  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2055  */
2056 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2057 {
2058         struct sh_mobile_lcdc_chan *ch = info->par;
2059         struct sh_mobile_lcdc_priv *p = ch->lcdc;
2060
2061         /* blank the screen? */
2062         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2063                 struct fb_fillrect rect = {
2064                         .width = ch->xres,
2065                         .height = ch->yres,
2066                 };
2067                 sh_mobile_lcdc_fillrect(info, &rect);
2068         }
2069         /* turn clocks on? */
2070         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2071                 sh_mobile_lcdc_clk_on(p);
2072         }
2073         /* turn clocks off? */
2074         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2075                 /* make sure the screen is updated with the black fill before
2076                  * switching the clocks off. one vsync is not enough since
2077                  * blanking may occur in the middle of a refresh. deferred io
2078                  * mode will reenable the clocks and update the screen in time,
2079                  * so it does not need this. */
2080                 if (!info->fbdefio) {
2081                         sh_mobile_lcdc_wait_for_vsync(ch);
2082                         sh_mobile_lcdc_wait_for_vsync(ch);
2083                 }
2084                 sh_mobile_lcdc_clk_off(p);
2085         }
2086
2087         ch->blank_status = blank;
2088         return 0;
2089 }
2090
2091 static struct fb_ops sh_mobile_lcdc_ops = {
2092         .owner          = THIS_MODULE,
2093         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2094         .fb_read        = fb_sys_read,
2095         .fb_write       = fb_sys_write,
2096         .fb_fillrect    = sh_mobile_lcdc_fillrect,
2097         .fb_copyarea    = sh_mobile_lcdc_copyarea,
2098         .fb_imageblit   = sh_mobile_lcdc_imageblit,
2099         .fb_blank       = sh_mobile_lcdc_blank,
2100         .fb_pan_display = sh_mobile_lcdc_pan,
2101         .fb_ioctl       = sh_mobile_lcdc_ioctl,
2102         .fb_open        = sh_mobile_lcdc_open,
2103         .fb_release     = sh_mobile_lcdc_release,
2104         .fb_check_var   = sh_mobile_lcdc_check_var,
2105         .fb_set_par     = sh_mobile_lcdc_set_par,
2106 };
2107
2108 static void
2109 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2110 {
2111         if (ch->info && ch->info->dev)
2112                 unregister_framebuffer(ch->info);
2113 }
2114
2115 static int __devinit
2116 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2117 {
2118         struct fb_info *info = ch->info;
2119         int ret;
2120
2121         if (info->fbdefio) {
2122                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2123                                      ch->fb_size >> PAGE_SHIFT);
2124                 if (!ch->sglist) {
2125                         dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2126                         return -ENOMEM;
2127                 }
2128         }
2129
2130         info->bl_dev = ch->bl;
2131
2132         ret = register_framebuffer(info);
2133         if (ret < 0)
2134                 return ret;
2135
2136         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2137                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2138                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2139                  info->var.bits_per_pixel);
2140
2141         /* deferred io mode: disable clock to save power */
2142         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2143                 sh_mobile_lcdc_clk_off(ch->lcdc);
2144
2145         return ret;
2146 }
2147
2148 static void
2149 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2150 {
2151         struct fb_info *info = ch->info;
2152
2153         if (!info || !info->device)
2154                 return;
2155
2156         if (ch->sglist)
2157                 vfree(ch->sglist);
2158
2159         fb_dealloc_cmap(&info->cmap);
2160         framebuffer_release(info);
2161 }
2162
2163 static int __devinit
2164 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2165                                const struct fb_videomode *mode,
2166                                unsigned int num_modes)
2167 {
2168         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2169         struct fb_var_screeninfo *var;
2170         struct fb_info *info;
2171         int ret;
2172
2173         /* Allocate and initialize the frame buffer device. Create the modes
2174          * list and allocate the color map.
2175          */
2176         info = framebuffer_alloc(0, priv->dev);
2177         if (info == NULL) {
2178                 dev_err(priv->dev, "unable to allocate fb_info\n");
2179                 return -ENOMEM;
2180         }
2181
2182         ch->info = info;
2183
2184         info->flags = FBINFO_FLAG_DEFAULT;
2185         info->fbops = &sh_mobile_lcdc_ops;
2186         info->device = priv->dev;
2187         info->screen_base = ch->fb_mem;
2188         info->pseudo_palette = &ch->pseudo_palette;
2189         info->par = ch;
2190
2191         fb_videomode_to_modelist(mode, num_modes, &info->modelist);
2192
2193         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2194         if (ret < 0) {
2195                 dev_err(priv->dev, "unable to allocate cmap\n");
2196                 return ret;
2197         }
2198
2199         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2200          * for NV12 and NV21.
2201          */
2202         info->fix = sh_mobile_lcdc_fix;
2203         info->fix.smem_start = ch->dma_handle;
2204         info->fix.smem_len = ch->fb_size;
2205         info->fix.line_length = ch->pitch;
2206
2207         if (ch->format->yuv)
2208                 info->fix.visual = FB_VISUAL_FOURCC;
2209         else
2210                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2211
2212         if (ch->format->fourcc == V4L2_PIX_FMT_NV12 ||
2213             ch->format->fourcc == V4L2_PIX_FMT_NV21)
2214                 info->fix.ypanstep = 2;
2215
2216         /* Initialize variable screen information using the first mode as
2217          * default. The default Y virtual resolution is twice the panel size to
2218          * allow for double-buffering.
2219          */
2220         var = &info->var;
2221         fb_videomode_to_var(var, mode);
2222         var->width = ch->cfg->panel_cfg.width;
2223         var->height = ch->cfg->panel_cfg.height;
2224         var->yres_virtual = var->yres * 2;
2225         var->activate = FB_ACTIVATE_NOW;
2226
2227         /* Use the legacy API by default for RGB formats, and the FOURCC API
2228          * for YUV formats.
2229          */
2230         if (!ch->format->yuv)
2231                 var->bits_per_pixel = ch->format->bpp;
2232         else
2233                 var->grayscale = ch->format->fourcc;
2234
2235         ret = sh_mobile_lcdc_check_var(var, info);
2236         if (ret)
2237                 return ret;
2238
2239         return 0;
2240 }
2241
2242 /* -----------------------------------------------------------------------------
2243  * Backlight
2244  */
2245
2246 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2247 {
2248         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2249         int brightness = bdev->props.brightness;
2250
2251         if (bdev->props.power != FB_BLANK_UNBLANK ||
2252             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2253                 brightness = 0;
2254
2255         return ch->cfg->bl_info.set_brightness(brightness);
2256 }
2257
2258 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2259 {
2260         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2261
2262         return ch->cfg->bl_info.get_brightness();
2263 }
2264
2265 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2266                                    struct fb_info *info)
2267 {
2268         return (info->bl_dev == bdev);
2269 }
2270
2271 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2272         .options        = BL_CORE_SUSPENDRESUME,
2273         .update_status  = sh_mobile_lcdc_update_bl,
2274         .get_brightness = sh_mobile_lcdc_get_brightness,
2275         .check_fb       = sh_mobile_lcdc_check_fb,
2276 };
2277
2278 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2279                                                struct sh_mobile_lcdc_chan *ch)
2280 {
2281         struct backlight_device *bl;
2282
2283         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2284                                        &sh_mobile_lcdc_bl_ops, NULL);
2285         if (IS_ERR(bl)) {
2286                 dev_err(parent, "unable to register backlight device: %ld\n",
2287                         PTR_ERR(bl));
2288                 return NULL;
2289         }
2290
2291         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2292         bl->props.brightness = bl->props.max_brightness;
2293         backlight_update_status(bl);
2294
2295         return bl;
2296 }
2297
2298 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2299 {
2300         backlight_device_unregister(bdev);
2301 }
2302
2303 /* -----------------------------------------------------------------------------
2304  * Power management
2305  */
2306
2307 static int sh_mobile_lcdc_suspend(struct device *dev)
2308 {
2309         struct platform_device *pdev = to_platform_device(dev);
2310
2311         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2312         return 0;
2313 }
2314
2315 static int sh_mobile_lcdc_resume(struct device *dev)
2316 {
2317         struct platform_device *pdev = to_platform_device(dev);
2318
2319         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2320 }
2321
2322 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2323 {
2324         struct platform_device *pdev = to_platform_device(dev);
2325         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2326
2327         /* turn off LCDC hardware */
2328         lcdc_write(priv, _LDCNT1R, 0);
2329
2330         return 0;
2331 }
2332
2333 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2334 {
2335         struct platform_device *pdev = to_platform_device(dev);
2336         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2337
2338         __sh_mobile_lcdc_start(priv);
2339
2340         return 0;
2341 }
2342
2343 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2344         .suspend = sh_mobile_lcdc_suspend,
2345         .resume = sh_mobile_lcdc_resume,
2346         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2347         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2348 };
2349
2350 /* -----------------------------------------------------------------------------
2351  * Framebuffer notifier
2352  */
2353
2354 /* locking: called with info->lock held */
2355 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2356                                  unsigned long action, void *data)
2357 {
2358         struct fb_event *event = data;
2359         struct fb_info *info = event->info;
2360         struct sh_mobile_lcdc_chan *ch = info->par;
2361
2362         if (&ch->lcdc->notifier != nb)
2363                 return NOTIFY_DONE;
2364
2365         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2366                 __func__, action, event->data);
2367
2368         switch(action) {
2369         case FB_EVENT_SUSPEND:
2370                 sh_mobile_lcdc_display_off(ch);
2371                 sh_mobile_lcdc_stop(ch->lcdc);
2372                 break;
2373         case FB_EVENT_RESUME:
2374                 mutex_lock(&ch->open_lock);
2375                 sh_mobile_fb_reconfig(info);
2376                 mutex_unlock(&ch->open_lock);
2377
2378                 sh_mobile_lcdc_display_on(ch);
2379                 sh_mobile_lcdc_start(ch->lcdc);
2380         }
2381
2382         return NOTIFY_OK;
2383 }
2384
2385 /* -----------------------------------------------------------------------------
2386  * Probe/remove and driver init/exit
2387  */
2388
2389 static const struct fb_videomode default_720p __devinitconst = {
2390         .name = "HDMI 720p",
2391         .xres = 1280,
2392         .yres = 720,
2393
2394         .left_margin = 220,
2395         .right_margin = 110,
2396         .hsync_len = 40,
2397
2398         .upper_margin = 20,
2399         .lower_margin = 5,
2400         .vsync_len = 5,
2401
2402         .pixclock = 13468,
2403         .refresh = 60,
2404         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2405 };
2406
2407 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2408 {
2409         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2410         unsigned int i;
2411
2412         fb_unregister_client(&priv->notifier);
2413
2414         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2415                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2416         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2417                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2418
2419         sh_mobile_lcdc_stop(priv);
2420
2421         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2422                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2423
2424                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2425
2426                 if (ovl->fb_mem)
2427                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2428                                           ovl->fb_mem, ovl->dma_handle);
2429         }
2430
2431         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2432                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2433
2434                 if (ch->tx_dev) {
2435                         ch->tx_dev->lcdc = NULL;
2436                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2437                 }
2438
2439                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2440
2441                 if (ch->fb_mem)
2442                         dma_free_coherent(&pdev->dev, ch->fb_size,
2443                                           ch->fb_mem, ch->dma_handle);
2444         }
2445
2446         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2447                 if (priv->ch[i].bl)
2448                         sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
2449         }
2450
2451         if (priv->dot_clk) {
2452                 pm_runtime_disable(&pdev->dev);
2453                 clk_put(priv->dot_clk);
2454         }
2455
2456         if (priv->base)
2457                 iounmap(priv->base);
2458
2459         if (priv->irq)
2460                 free_irq(priv->irq, priv);
2461         kfree(priv);
2462         return 0;
2463 }
2464
2465 static int __devinit sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2466 {
2467         int interface_type = ch->cfg->interface_type;
2468
2469         switch (interface_type) {
2470         case RGB8:
2471         case RGB9:
2472         case RGB12A:
2473         case RGB12B:
2474         case RGB16:
2475         case RGB18:
2476         case RGB24:
2477         case SYS8A:
2478         case SYS8B:
2479         case SYS8C:
2480         case SYS8D:
2481         case SYS9:
2482         case SYS12:
2483         case SYS16A:
2484         case SYS16B:
2485         case SYS16C:
2486         case SYS18:
2487         case SYS24:
2488                 break;
2489         default:
2490                 return -EINVAL;
2491         }
2492
2493         /* SUBLCD only supports SYS interface */
2494         if (lcdc_chan_is_sublcd(ch)) {
2495                 if (!(interface_type & LDMT1R_IFM))
2496                         return -EINVAL;
2497
2498                 interface_type &= ~LDMT1R_IFM;
2499         }
2500
2501         ch->ldmt1r_value = interface_type;
2502         return 0;
2503 }
2504
2505 static int __devinit
2506 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_priv *priv,
2507                           struct sh_mobile_lcdc_overlay *ovl)
2508 {
2509         const struct sh_mobile_lcdc_format_info *format;
2510         int ret;
2511
2512         if (ovl->cfg->fourcc == 0)
2513                 return 0;
2514
2515         /* Validate the format. */
2516         format = sh_mobile_format_info(ovl->cfg->fourcc);
2517         if (format == NULL) {
2518                 dev_err(priv->dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2519                 return -EINVAL;
2520         }
2521
2522         ovl->enabled = false;
2523         ovl->mode = LCDC_OVERLAY_BLEND;
2524         ovl->alpha = 255;
2525         ovl->rop3 = 0;
2526         ovl->pos_x = 0;
2527         ovl->pos_y = 0;
2528
2529         /* The default Y virtual resolution is twice the panel size to allow for
2530          * double-buffering.
2531          */
2532         ovl->format = format;
2533         ovl->xres = ovl->cfg->max_xres;
2534         ovl->xres_virtual = ovl->xres;
2535         ovl->yres = ovl->cfg->max_yres;
2536         ovl->yres_virtual = ovl->yres * 2;
2537
2538         if (!format->yuv)
2539                 ovl->pitch = ovl->xres * format->bpp / 8;
2540         else
2541                 ovl->pitch = ovl->xres;
2542
2543         /* Allocate frame buffer memory. */
2544         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2545                        * format->bpp / 8 * 2;
2546         ovl->fb_mem = dma_alloc_coherent(priv->dev, ovl->fb_size,
2547                                            &ovl->dma_handle, GFP_KERNEL);
2548         if (!ovl->fb_mem) {
2549                 dev_err(priv->dev, "unable to allocate buffer\n");
2550                 return -ENOMEM;
2551         }
2552
2553         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2554         if (ret < 0)
2555                 return ret;
2556
2557         return 0;
2558 }
2559
2560 static int __devinit
2561 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_priv *priv,
2562                             struct sh_mobile_lcdc_chan *ch)
2563 {
2564         const struct sh_mobile_lcdc_format_info *format;
2565         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2566         const struct fb_videomode *max_mode;
2567         const struct fb_videomode *mode;
2568         unsigned int num_modes;
2569         unsigned int max_size;
2570         unsigned int i;
2571
2572         mutex_init(&ch->open_lock);
2573         ch->notify = sh_mobile_lcdc_display_notify;
2574
2575         /* Validate the format. */
2576         format = sh_mobile_format_info(cfg->fourcc);
2577         if (format == NULL) {
2578                 dev_err(priv->dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2579                 return -EINVAL;
2580         }
2581
2582         /* Iterate through the modes to validate them and find the highest
2583          * resolution.
2584          */
2585         max_mode = NULL;
2586         max_size = 0;
2587
2588         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2589                 unsigned int size = mode->yres * mode->xres;
2590
2591                 /* NV12/NV21 buffers must have even number of lines */
2592                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2593                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2594                         dev_err(priv->dev, "yres must be multiple of 2 for "
2595                                 "YCbCr420 mode.\n");
2596                         return -EINVAL;
2597                 }
2598
2599                 if (size > max_size) {
2600                         max_mode = mode;
2601                         max_size = size;
2602                 }
2603         }
2604
2605         if (!max_size)
2606                 max_size = MAX_XRES * MAX_YRES;
2607         else
2608                 dev_dbg(priv->dev, "Found largest videomode %ux%u\n",
2609                         max_mode->xres, max_mode->yres);
2610
2611         if (cfg->lcd_modes == NULL) {
2612                 mode = &default_720p;
2613                 num_modes = 1;
2614         } else {
2615                 mode = cfg->lcd_modes;
2616                 num_modes = cfg->num_modes;
2617         }
2618
2619         /* Use the first mode as default. */
2620         ch->format = format;
2621         ch->xres = mode->xres;
2622         ch->xres_virtual = mode->xres;
2623         ch->yres = mode->yres;
2624         ch->yres_virtual = mode->yres * 2;
2625
2626         if (!format->yuv) {
2627                 ch->colorspace = V4L2_COLORSPACE_SRGB;
2628                 ch->pitch = ch->xres * format->bpp / 8;
2629         } else {
2630                 ch->colorspace = V4L2_COLORSPACE_REC709;
2631                 ch->pitch = ch->xres;
2632         }
2633
2634         ch->display.width = cfg->panel_cfg.width;
2635         ch->display.height = cfg->panel_cfg.height;
2636         ch->display.mode = *mode;
2637
2638         /* Allocate frame buffer memory. */
2639         ch->fb_size = max_size * format->bpp / 8 * 2;
2640         ch->fb_mem = dma_alloc_coherent(priv->dev, ch->fb_size, &ch->dma_handle,
2641                                         GFP_KERNEL);
2642         if (ch->fb_mem == NULL) {
2643                 dev_err(priv->dev, "unable to allocate buffer\n");
2644                 return -ENOMEM;
2645         }
2646
2647         /* Initialize the transmitter device if present. */
2648         if (cfg->tx_dev) {
2649                 if (!cfg->tx_dev->dev.driver ||
2650                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2651                         dev_warn(priv->dev,
2652                                  "unable to get transmitter device\n");
2653                         return -EINVAL;
2654                 }
2655                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2656                 ch->tx_dev->lcdc = ch;
2657                 ch->tx_dev->def_mode = *mode;
2658         }
2659
2660         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2661 }
2662
2663 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
2664 {
2665         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2666         struct sh_mobile_lcdc_priv *priv;
2667         struct resource *res;
2668         int num_channels;
2669         int error;
2670         int i;
2671
2672         if (!pdata) {
2673                 dev_err(&pdev->dev, "no platform data defined\n");
2674                 return -EINVAL;
2675         }
2676
2677         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2678         i = platform_get_irq(pdev, 0);
2679         if (!res || i < 0) {
2680                 dev_err(&pdev->dev, "cannot get platform resources\n");
2681                 return -ENOENT;
2682         }
2683
2684         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2685         if (!priv) {
2686                 dev_err(&pdev->dev, "cannot allocate device data\n");
2687                 return -ENOMEM;
2688         }
2689
2690         priv->dev = &pdev->dev;
2691         priv->meram_dev = pdata->meram_dev;
2692         platform_set_drvdata(pdev, priv);
2693
2694         error = request_irq(i, sh_mobile_lcdc_irq, 0,
2695                             dev_name(&pdev->dev), priv);
2696         if (error) {
2697                 dev_err(&pdev->dev, "unable to request irq\n");
2698                 goto err1;
2699         }
2700
2701         priv->irq = i;
2702         atomic_set(&priv->hw_usecnt, -1);
2703
2704         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2705                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2706
2707                 ch->lcdc = priv;
2708                 ch->cfg = &pdata->ch[i];
2709
2710                 error = sh_mobile_lcdc_check_interface(ch);
2711                 if (error) {
2712                         dev_err(&pdev->dev, "unsupported interface type\n");
2713                         goto err1;
2714                 }
2715                 init_waitqueue_head(&ch->frame_end_wait);
2716                 init_completion(&ch->vsync_completion);
2717                 ch->pan_offset = 0;
2718
2719                 /* probe the backlight is there is one defined */
2720                 if (ch->cfg->bl_info.max_brightness)
2721                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2722
2723                 switch (pdata->ch[i].chan) {
2724                 case LCDC_CHAN_MAINLCD:
2725                         ch->enabled = LDCNT2R_ME;
2726                         ch->reg_offs = lcdc_offs_mainlcd;
2727                         num_channels++;
2728                         break;
2729                 case LCDC_CHAN_SUBLCD:
2730                         ch->enabled = LDCNT2R_SE;
2731                         ch->reg_offs = lcdc_offs_sublcd;
2732                         num_channels++;
2733                         break;
2734                 }
2735         }
2736
2737         if (!num_channels) {
2738                 dev_err(&pdev->dev, "no channels defined\n");
2739                 error = -EINVAL;
2740                 goto err1;
2741         }
2742
2743         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2744         if (num_channels == 2)
2745                 priv->forced_fourcc = pdata->ch[0].fourcc;
2746
2747         priv->base = ioremap_nocache(res->start, resource_size(res));
2748         if (!priv->base)
2749                 goto err1;
2750
2751         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2752         if (error) {
2753                 dev_err(&pdev->dev, "unable to setup clocks\n");
2754                 goto err1;
2755         }
2756
2757         /* Enable runtime PM. */
2758         pm_runtime_enable(&pdev->dev);
2759
2760         for (i = 0; i < num_channels; i++) {
2761                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2762
2763                 error = sh_mobile_lcdc_channel_init(priv, ch);
2764                 if (error)
2765                         goto err1;
2766         }
2767
2768         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2769                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2770
2771                 ovl->cfg = &pdata->overlays[i];
2772                 ovl->channel = &priv->ch[0];
2773
2774                 error = sh_mobile_lcdc_overlay_init(priv, ovl);
2775                 if (error)
2776                         goto err1;
2777         }
2778
2779         error = sh_mobile_lcdc_start(priv);
2780         if (error) {
2781                 dev_err(&pdev->dev, "unable to start hardware\n");
2782                 goto err1;
2783         }
2784
2785         for (i = 0; i < num_channels; i++) {
2786                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2787
2788                 error = sh_mobile_lcdc_channel_fb_register(ch);
2789                 if (error)
2790                         goto err1;
2791         }
2792
2793         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2794                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2795
2796                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2797                 if (error)
2798                         goto err1;
2799         }
2800
2801         /* Failure ignored */
2802         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2803         fb_register_client(&priv->notifier);
2804
2805         return 0;
2806 err1:
2807         sh_mobile_lcdc_remove(pdev);
2808
2809         return error;
2810 }
2811
2812 static struct platform_driver sh_mobile_lcdc_driver = {
2813         .driver         = {
2814                 .name           = "sh_mobile_lcdc_fb",
2815                 .owner          = THIS_MODULE,
2816                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2817         },
2818         .probe          = sh_mobile_lcdc_probe,
2819         .remove         = sh_mobile_lcdc_remove,
2820 };
2821
2822 module_platform_driver(sh_mobile_lcdc_driver);
2823
2824 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2825 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2826 MODULE_LICENSE("GPL v2");