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