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 #include <video/sh_mobile_meram.h>
  33
  34 #include "sh_mobile_lcdcfb.h"
  35
  36 /* ----------------------------------------------------------------------------
  37  * Overlay register definitions
  38  */
  39
  40 #define LDBCR                   0xb00
  41 #define LDBCR_UPC(n)            (1 << ((n) + 16))
  42 #define LDBCR_UPF(n)            (1 << ((n) + 8))
  43 #define LDBCR_UPD(n)            (1 << ((n) + 0))
  44 #define LDBnBSIFR(n)            (0xb20 + (n) * 0x20 + 0x00)
  45 #define LDBBSIFR_EN             (1 << 31)
  46 #define LDBBSIFR_VS             (1 << 29)
  47 #define LDBBSIFR_BRSEL          (1 << 28)
  48 #define LDBBSIFR_MX             (1 << 27)
  49 #define LDBBSIFR_MY             (1 << 26)
  50 #define LDBBSIFR_CV3            (3 << 24)
  51 #define LDBBSIFR_CV2            (2 << 24)
  52 #define LDBBSIFR_CV1            (1 << 24)
  53 #define LDBBSIFR_CV0            (0 << 24)
  54 #define LDBBSIFR_CV_MASK        (3 << 24)
  55 #define LDBBSIFR_LAY_MASK       (0xff << 16)
  56 #define LDBBSIFR_LAY_SHIFT      16
  57 #define LDBBSIFR_ROP3_MASK      (0xff << 16)
  58 #define LDBBSIFR_ROP3_SHIFT     16
  59 #define LDBBSIFR_AL_PL8         (3 << 14)
  60 #define LDBBSIFR_AL_PL1         (2 << 14)
  61 #define LDBBSIFR_AL_PK          (1 << 14)
  62 #define LDBBSIFR_AL_1           (0 << 14)
  63 #define LDBBSIFR_AL_MASK        (3 << 14)
  64 #define LDBBSIFR_SWPL           (1 << 10)
  65 #define LDBBSIFR_SWPW           (1 << 9)
  66 #define LDBBSIFR_SWPB           (1 << 8)
  67 #define LDBBSIFR_RY             (1 << 7)
  68 #define LDBBSIFR_CHRR_420       (2 << 0)
  69 #define LDBBSIFR_CHRR_422       (1 << 0)
  70 #define LDBBSIFR_CHRR_444       (0 << 0)
  71 #define LDBBSIFR_RPKF_ARGB32    (0x00 << 0)
  72 #define LDBBSIFR_RPKF_RGB16     (0x03 << 0)
  73 #define LDBBSIFR_RPKF_RGB24     (0x0b << 0)
  74 #define LDBBSIFR_RPKF_MASK      (0x1f << 0)
  75 #define LDBnBSSZR(n)            (0xb20 + (n) * 0x20 + 0x04)
  76 #define LDBBSSZR_BVSS_MASK      (0xfff << 16)
  77 #define LDBBSSZR_BVSS_SHIFT     16
  78 #define LDBBSSZR_BHSS_MASK      (0xfff << 0)
  79 #define LDBBSSZR_BHSS_SHIFT     0
  80 #define LDBnBLOCR(n)            (0xb20 + (n) * 0x20 + 0x08)
  81 #define LDBBLOCR_CVLC_MASK      (0xfff << 16)
  82 #define LDBBLOCR_CVLC_SHIFT     16
  83 #define LDBBLOCR_CHLC_MASK      (0xfff << 0)
  84 #define LDBBLOCR_CHLC_SHIFT     0
  85 #define LDBnBSMWR(n)            (0xb20 + (n) * 0x20 + 0x0c)
  86 #define LDBBSMWR_BSMWA_MASK     (0xffff << 16)
  87 #define LDBBSMWR_BSMWA_SHIFT    16
  88 #define LDBBSMWR_BSMW_MASK      (0xffff << 0)
  89 #define LDBBSMWR_BSMW_SHIFT     0
  90 #define LDBnBSAYR(n)            (0xb20 + (n) * 0x20 + 0x10)
  91 #define LDBBSAYR_FG1A_MASK      (0xff << 24)
  92 #define LDBBSAYR_FG1A_SHIFT     24
  93 #define LDBBSAYR_FG1R_MASK      (0xff << 16)
  94 #define LDBBSAYR_FG1R_SHIFT     16
  95 #define LDBBSAYR_FG1G_MASK      (0xff << 8)
  96 #define LDBBSAYR_FG1G_SHIFT     8
  97 #define LDBBSAYR_FG1B_MASK      (0xff << 0)
  98 #define LDBBSAYR_FG1B_SHIFT     0
  99 #define LDBnBSACR(n)            (0xb20 + (n) * 0x20 + 0x14)
 100 #define LDBBSACR_FG2A_MASK      (0xff << 24)
 101 #define LDBBSACR_FG2A_SHIFT     24
 102 #define LDBBSACR_FG2R_MASK      (0xff << 16)
 103 #define LDBBSACR_FG2R_SHIFT     16
 104 #define LDBBSACR_FG2G_MASK      (0xff << 8)
 105 #define LDBBSACR_FG2G_SHIFT     8
 106 #define LDBBSACR_FG2B_MASK      (0xff << 0)
 107 #define LDBBSACR_FG2B_SHIFT     0
 108 #define LDBnBSAAR(n)            (0xb20 + (n) * 0x20 + 0x18)
 109 #define LDBBSAAR_AP_MASK        (0xff << 24)
 110 #define LDBBSAAR_AP_SHIFT       24
 111 #define LDBBSAAR_R_MASK         (0xff << 16)
 112 #define LDBBSAAR_R_SHIFT        16
 113 #define LDBBSAAR_GY_MASK        (0xff << 8)
 114 #define LDBBSAAR_GY_SHIFT       8
 115 #define LDBBSAAR_B_MASK         (0xff << 0)
 116 #define LDBBSAAR_B_SHIFT        0
 117 #define LDBnBPPCR(n)            (0xb20 + (n) * 0x20 + 0x1c)
 118 #define LDBBPPCR_AP_MASK        (0xff << 24)
 119 #define LDBBPPCR_AP_SHIFT       24
 120 #define LDBBPPCR_R_MASK         (0xff << 16)
 121 #define LDBBPPCR_R_SHIFT        16
 122 #define LDBBPPCR_GY_MASK        (0xff << 8)
 123 #define LDBBPPCR_GY_SHIFT       8
 124 #define LDBBPPCR_B_MASK         (0xff << 0)
 125 #define LDBBPPCR_B_SHIFT        0
 126 #define LDBnBBGCL(n)            (0xb10 + (n) * 0x04)
 127 #define LDBBBGCL_BGA_MASK       (0xff << 24)
 128 #define LDBBBGCL_BGA_SHIFT      24
 129 #define LDBBBGCL_BGR_MASK       (0xff << 16)
 130 #define LDBBBGCL_BGR_SHIFT      16
 131 #define LDBBBGCL_BGG_MASK       (0xff << 8)
 132 #define LDBBBGCL_BGG_SHIFT      8
 133 #define LDBBBGCL_BGB_MASK       (0xff << 0)
 134 #define LDBBBGCL_BGB_SHIFT      0
 135
 136 #define SIDE_B_OFFSET 0x1000
 137 #define MIRROR_OFFSET 0x2000
 138
 139 #define MAX_XRES 1920
 140 #define MAX_YRES 1080
 141
 142 enum sh_mobile_lcdc_overlay_mode {
 143         LCDC_OVERLAY_BLEND,
 144         LCDC_OVERLAY_ROP3,
 145 };
 146
 147 /*
 148  * struct sh_mobile_lcdc_overlay - LCDC display overlay
 149  *
 150  * @channel: LCDC channel this overlay belongs to
 151  * @cfg: Overlay configuration
 152  * @info: Frame buffer device
 153  * @index: Overlay index (0-3)
 154  * @base: Overlay registers base address
 155  * @enabled: True if the overlay is enabled
 156  * @mode: Overlay blending mode (alpha blend or ROP3)
 157  * @alpha: Global alpha blending value (0-255, for alpha blending mode)
 158  * @rop3: Raster operation (for ROP3 mode)
 159  * @fb_mem: Frame buffer virtual memory address
 160  * @fb_size: Frame buffer size in bytes
 161  * @dma_handle: Frame buffer DMA address
 162  * @base_addr_y: Overlay base address (RGB or luma component)
 163  * @base_addr_c: Overlay base address (chroma component)
 164  * @pan_y_offset: Panning linear offset in bytes (luma component)
 165  * @format: Current pixelf format
 166  * @xres: Horizontal visible resolution
 167  * @xres_virtual: Horizontal total resolution
 168  * @yres: Vertical visible resolution
 169  * @yres_virtual: Vertical total resolution
 170  * @pitch: Overlay line pitch
 171  * @pos_x: Horizontal overlay position
 172  * @pos_y: Vertical overlay position
 173  */
 174 struct sh_mobile_lcdc_overlay {
 175         struct sh_mobile_lcdc_chan *channel;
 176
 177         const struct sh_mobile_lcdc_overlay_cfg *cfg;
 178         struct fb_info *info;
 179
 180         unsigned int index;
 181         unsigned long base;
 182
 183         bool enabled;
 184         enum sh_mobile_lcdc_overlay_mode mode;
 185         unsigned int alpha;
 186         unsigned int rop3;
 187
 188         void *fb_mem;
 189         unsigned long fb_size;
 190
 191         dma_addr_t dma_handle;
 192         unsigned long base_addr_y;
 193         unsigned long base_addr_c;
 194         unsigned long pan_y_offset;
 195
 196         const struct sh_mobile_lcdc_format_info *format;
 197         unsigned int xres;
 198         unsigned int xres_virtual;
 199         unsigned int yres;
 200         unsigned int yres_virtual;
 201         unsigned int pitch;
 202         int pos_x;
 203         int pos_y;
 204 };
 205
 206 struct sh_mobile_lcdc_priv {
 207         void __iomem *base;
 208         int irq;
 209         atomic_t hw_usecnt;
 210         struct device *dev;
 211         struct clk *dot_clk;
 212         unsigned long lddckr;
 213
 214         struct sh_mobile_lcdc_chan ch[2];
 215         struct sh_mobile_lcdc_overlay overlays[4];
 216
 217         struct notifier_block notifier;
 218         int started;
 219         int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 220         struct sh_mobile_meram_info *meram_dev;
 221 };
 222
 223 /* -----------------------------------------------------------------------------
 224  * Registers access
 225  */
 226
 227 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
 228         [LDDCKPAT1R] = 0x400,
 229         [LDDCKPAT2R] = 0x404,
 230         [LDMT1R] = 0x418,
 231         [LDMT2R] = 0x41c,
 232         [LDMT3R] = 0x420,
 233         [LDDFR] = 0x424,
 234         [LDSM1R] = 0x428,
 235         [LDSM2R] = 0x42c,
 236         [LDSA1R] = 0x430,
 237         [LDSA2R] = 0x434,
 238         [LDMLSR] = 0x438,
 239         [LDHCNR] = 0x448,
 240         [LDHSYNR] = 0x44c,
 241         [LDVLNR] = 0x450,
 242         [LDVSYNR] = 0x454,
 243         [LDPMR] = 0x460,
 244         [LDHAJR] = 0x4a0,
 245 };
 246
 247 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 248         [LDDCKPAT1R] = 0x408,
 249         [LDDCKPAT2R] = 0x40c,
 250         [LDMT1R] = 0x600,
 251         [LDMT2R] = 0x604,
 252         [LDMT3R] = 0x608,
 253         [LDDFR] = 0x60c,
 254         [LDSM1R] = 0x610,
 255         [LDSM2R] = 0x614,
 256         [LDSA1R] = 0x618,
 257         [LDMLSR] = 0x620,
 258         [LDHCNR] = 0x624,
 259         [LDHSYNR] = 0x628,
 260         [LDVLNR] = 0x62c,
 261         [LDVSYNR] = 0x630,
 262         [LDPMR] = 0x63c,
 263 };
 264
 265 static bool banked(int reg_nr)
 266 {
 267         switch (reg_nr) {
 268         case LDMT1R:
 269         case LDMT2R:
 270         case LDMT3R:
 271         case LDDFR:
 272         case LDSM1R:
 273         case LDSA1R:
 274         case LDSA2R:
 275         case LDMLSR:
 276         case LDHCNR:
 277         case LDHSYNR:
 278         case LDVLNR:
 279         case LDVSYNR:
 280                 return true;
 281         }
 282         return false;
 283 }
 284
 285 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 286 {
 287         return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 288 }
 289
 290 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 291                             int reg_nr, unsigned long data)
 292 {
 293         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 294         if (banked(reg_nr))
 295                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 296                           SIDE_B_OFFSET);
 297 }
 298
 299 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 300                             int reg_nr, unsigned long data)
 301 {
 302         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 303                   MIRROR_OFFSET);
 304 }
 305
 306 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 307                                     int reg_nr)
 308 {
 309         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 310 }
 311
 312 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
 313                                int reg, unsigned long data)
 314 {
 315         iowrite32(data, ovl->channel->lcdc->base + reg);
 316         iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
 317 }
 318
 319 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 320                        unsigned long reg_offs, unsigned long data)
 321 {
 322         iowrite32(data, priv->base + reg_offs);
 323 }
 324
 325 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 326                                unsigned long reg_offs)
 327 {
 328         return ioread32(priv->base + reg_offs);
 329 }
 330
 331 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 332                           unsigned long reg_offs,
 333                           unsigned long mask, unsigned long until)
 334 {
 335         while ((lcdc_read(priv, reg_offs) & mask) != until)
 336                 cpu_relax();
 337 }
 338
 339 /* -----------------------------------------------------------------------------
 340  * Clock management
 341  */
 342
 343 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 344 {
 345         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 346                 if (priv->dot_clk)
 347                         clk_prepare_enable(priv->dot_clk);
 348                 pm_runtime_get_sync(priv->dev);
 349                 if (priv->meram_dev && priv->meram_dev->pdev)
 350                         pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
 351         }
 352 }
 353
 354 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 355 {
 356         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 357                 if (priv->meram_dev && priv->meram_dev->pdev)
 358                         pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
 359                 pm_runtime_put(priv->dev);
 360                 if (priv->dot_clk)
 361                         clk_disable_unprepare(priv->dot_clk);
 362         }
 363 }
 364
 365 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 366                                        int clock_source)
 367 {
 368         struct clk *clk;
 369         char *str;
 370
 371         switch (clock_source) {
 372         case LCDC_CLK_BUS:
 373                 str = "bus_clk";
 374                 priv->lddckr = LDDCKR_ICKSEL_BUS;
 375                 break;
 376         case LCDC_CLK_PERIPHERAL:
 377                 str = "peripheral_clk";
 378                 priv->lddckr = LDDCKR_ICKSEL_MIPI;
 379                 break;
 380         case LCDC_CLK_EXTERNAL:
 381                 str = NULL;
 382                 priv->lddckr = LDDCKR_ICKSEL_HDMI;
 383                 break;
 384         default:
 385                 return -EINVAL;
 386         }
 387
 388         if (str == NULL)
 389                 return 0;
 390
 391         clk = clk_get(priv->dev, str);
 392         if (IS_ERR(clk)) {
 393                 dev_err(priv->dev, "cannot get dot clock %s\n", str);
 394                 return PTR_ERR(clk);
 395         }
 396
 397         priv->dot_clk = clk;
 398         return 0;
 399 }
 400
 401 /* -----------------------------------------------------------------------------
 402  * Display, panel and deferred I/O
 403  */
 404
 405 static void lcdc_sys_write_index(void *handle, unsigned long data)
 406 {
 407         struct sh_mobile_lcdc_chan *ch = handle;
 408
 409         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 410         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 411         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 412                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 413         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 414 }
 415
 416 static void lcdc_sys_write_data(void *handle, unsigned long data)
 417 {
 418         struct sh_mobile_lcdc_chan *ch = handle;
 419
 420         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 421         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 422         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 423                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 424         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 425 }
 426
 427 static unsigned long lcdc_sys_read_data(void *handle)
 428 {
 429         struct sh_mobile_lcdc_chan *ch = handle;
 430
 431         lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 432         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 433         lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 434                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 435         udelay(1);
 436         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 437
 438         return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 439 }
 440
 441 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 442         .write_index    = lcdc_sys_write_index,
 443         .write_data     = lcdc_sys_write_data,
 444         .read_data      = lcdc_sys_read_data,
 445 };
 446
 447 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 448                                   struct list_head *pagelist)
 449 {
 450         struct sh_mobile_lcdc_chan *ch = info->par;
 451         unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 452         struct page *page;
 453         int nr_pages = 0;
 454
 455         sg_init_table(ch->sglist, nr_pages_max);
 456
 457         list_for_each_entry(page, pagelist, lru)
 458                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 459
 460         return nr_pages;
 461 }
 462
 463 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 464                                        struct list_head *pagelist)
 465 {
 466         struct sh_mobile_lcdc_chan *ch = info->par;
 467         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 468
 469         /* enable clocks before accessing hardware */
 470         sh_mobile_lcdc_clk_on(ch->lcdc);
 471
 472         /*
 473          * It's possible to get here without anything on the pagelist via
 474          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 475          * invocation. In the former case, the acceleration routines are
 476          * stepped in to when using the framebuffer console causing the
 477          * workqueue to be scheduled without any dirty pages on the list.
 478          *
 479          * Despite this, a panel update is still needed given that the
 480          * acceleration routines have their own methods for writing in
 481          * that still need to be updated.
 482          *
 483          * The fsync() and empty pagelist case could be optimized for,
 484          * but we don't bother, as any application exhibiting such
 485          * behaviour is fundamentally broken anyways.
 486          */
 487         if (!list_empty(pagelist)) {
 488                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 489
 490                 /* trigger panel update */
 491                 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 492                 if (panel->start_transfer)
 493                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 494                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 495                 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 496                              DMA_TO_DEVICE);
 497         } else {
 498                 if (panel->start_transfer)
 499                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 500                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 501         }
 502 }
 503
 504 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 505 {
 506         struct fb_deferred_io *fbdefio = info->fbdefio;
 507
 508         if (fbdefio)
 509                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 510 }
 511
 512 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 513 {
 514         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 515
 516         if (ch->tx_dev) {
 517                 int ret;
 518
 519                 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 520                 if (ret < 0)
 521                         return;
 522
 523                 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 524                         ch->info->state = FBINFO_STATE_SUSPENDED;
 525         }
 526
 527         /* HDMI must be enabled before LCDC configuration */
 528         if (panel->display_on)
 529                 panel->display_on();
 530 }
 531
 532 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 533 {
 534         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 535
 536         if (panel->display_off)
 537                 panel->display_off();
 538
 539         if (ch->tx_dev)
 540                 ch->tx_dev->ops->display_off(ch->tx_dev);
 541 }
 542
 543 static bool
 544 sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
 545                                 const struct fb_videomode *new_mode)
 546 {
 547         dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
 548                 ch->display.mode.xres, ch->display.mode.yres,
 549                 new_mode->xres, new_mode->yres);
 550
 551         /* It can be a different monitor with an equal video-mode */
 552         if (fb_mode_is_equal(&ch->display.mode, new_mode))
 553                 return false;
 554
 555         dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
 556                 ch->display.mode.yres, new_mode->yres);
 557         ch->display.mode = *new_mode;
 558
 559         return true;
 560 }
 561
 562 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 563                                     struct fb_info *info);
 564
 565 static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
 566                                          enum sh_mobile_lcdc_entity_event event,
 567                                          const struct fb_videomode *mode,
 568                                          const struct fb_monspecs *monspec)
 569 {
 570         struct fb_info *info = ch->info;
 571         struct fb_var_screeninfo var;
 572         int ret = 0;
 573
 574         switch (event) {
 575         case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
 576                 /* HDMI plug in */
 577                 console_lock();
 578                 if (lock_fb_info(info)) {
 579
 580
 581                         ch->display.width = monspec->max_x * 10;
 582                         ch->display.height = monspec->max_y * 10;
 583
 584                         if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
 585                             info->state == FBINFO_STATE_RUNNING) {
 586                                 /* First activation with the default monitor.
 587                                  * Just turn on, if we run a resume here, the
 588                                  * logo disappears.
 589                                  */
 590                                 info->var.width = ch->display.width;
 591                                 info->var.height = ch->display.height;
 592                                 sh_mobile_lcdc_display_on(ch);
 593                         } else {
 594                                 /* New monitor or have to wake up */
 595                                 fb_set_suspend(info, 0);
 596                         }
 597
 598
 599                         unlock_fb_info(info);
 600                 }
 601                 console_unlock();
 602                 break;
 603
 604         case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
 605                 /* HDMI disconnect */
 606                 console_lock();
 607                 if (lock_fb_info(info)) {
 608                         fb_set_suspend(info, 1);
 609                         unlock_fb_info(info);
 610                 }
 611                 console_unlock();
 612                 break;
 613
 614         case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
 615                 /* Validate a proposed new mode */
 616                 fb_videomode_to_var(&var, mode);
 617                 var.bits_per_pixel = info->var.bits_per_pixel;
 618                 var.grayscale = info->var.grayscale;
 619                 ret = sh_mobile_lcdc_check_var(&var, info);
 620                 break;
 621         }
 622
 623         return ret;
 624 }
 625
 626 /* -----------------------------------------------------------------------------
 627  * Format helpers
 628  */
 629
 630 struct sh_mobile_lcdc_format_info {
 631         u32 fourcc;
 632         unsigned int bpp;
 633         bool yuv;
 634         u32 lddfr;
 635 };
 636
 637 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 638         {
 639                 .fourcc = V4L2_PIX_FMT_RGB565,
 640                 .bpp = 16,
 641                 .yuv = false,
 642                 .lddfr = LDDFR_PKF_RGB16,
 643         }, {
 644                 .fourcc = V4L2_PIX_FMT_BGR24,
 645                 .bpp = 24,
 646                 .yuv = false,
 647                 .lddfr = LDDFR_PKF_RGB24,
 648         }, {
 649                 .fourcc = V4L2_PIX_FMT_BGR32,
 650                 .bpp = 32,
 651                 .yuv = false,
 652                 .lddfr = LDDFR_PKF_ARGB32,
 653         }, {
 654                 .fourcc = V4L2_PIX_FMT_NV12,
 655                 .bpp = 12,
 656                 .yuv = true,
 657                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 658         }, {
 659                 .fourcc = V4L2_PIX_FMT_NV21,
 660                 .bpp = 12,
 661                 .yuv = true,
 662                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 663         }, {
 664                 .fourcc = V4L2_PIX_FMT_NV16,
 665                 .bpp = 16,
 666                 .yuv = true,
 667                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 668         }, {
 669                 .fourcc = V4L2_PIX_FMT_NV61,
 670                 .bpp = 16,
 671                 .yuv = true,
 672                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 673         }, {
 674                 .fourcc = V4L2_PIX_FMT_NV24,
 675                 .bpp = 24,
 676                 .yuv = true,
 677                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 678         }, {
 679                 .fourcc = V4L2_PIX_FMT_NV42,
 680                 .bpp = 24,
 681                 .yuv = true,
 682                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 683         },
 684 };
 685
 686 static const struct sh_mobile_lcdc_format_info *
 687 sh_mobile_format_info(u32 fourcc)
 688 {
 689         unsigned int i;
 690
 691         for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 692                 if (sh_mobile_format_infos[i].fourcc == fourcc)
 693                         return &sh_mobile_format_infos[i];
 694         }
 695
 696         return NULL;
 697 }
 698
 699 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 700 {
 701         if (var->grayscale > 1)
 702                 return var->grayscale;
 703
 704         switch (var->bits_per_pixel) {
 705         case 16:
 706                 return V4L2_PIX_FMT_RGB565;
 707         case 24:
 708                 return V4L2_PIX_FMT_BGR24;
 709         case 32:
 710                 return V4L2_PIX_FMT_BGR32;
 711         default:
 712                 return 0;
 713         }
 714 }
 715
 716 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 717 {
 718         return var->grayscale > 1;
 719 }
 720
 721 /* -----------------------------------------------------------------------------
 722  * Start, stop and IRQ
 723  */
 724
 725 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 726 {
 727         struct sh_mobile_lcdc_priv *priv = data;
 728         struct sh_mobile_lcdc_chan *ch;
 729         unsigned long ldintr;
 730         int is_sub;
 731         int k;
 732
 733         /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 734         ldintr = lcdc_read(priv, _LDINTR);
 735         lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 736
 737         /* figure out if this interrupt is for main or sub lcd */
 738         is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 739
 740         /* wake up channel and disable clocks */
 741         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 742                 ch = &priv->ch[k];
 743
 744                 if (!ch->enabled)
 745                         continue;
 746
 747                 /* Frame End */
 748                 if (ldintr & LDINTR_FS) {
 749                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 750                                 ch->frame_end = 1;
 751                                 wake_up(&ch->frame_end_wait);
 752
 753                                 sh_mobile_lcdc_clk_off(priv);
 754                         }
 755                 }
 756
 757                 /* VSYNC End */
 758                 if (ldintr & LDINTR_VES)
 759                         complete(&ch->vsync_completion);
 760         }
 761
 762         return IRQ_HANDLED;
 763 }
 764
 765 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 766 {
 767         unsigned long ldintr;
 768         int ret;
 769
 770         /* Enable VSync End interrupt and be careful not to acknowledge any
 771          * pending interrupt.
 772          */
 773         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 774         ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 775         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 776
 777         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 778                                                         msecs_to_jiffies(100));
 779         if (!ret)
 780                 return -ETIMEDOUT;
 781
 782         return 0;
 783 }
 784
 785 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 786                                       int start)
 787 {
 788         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 789         int k;
 790
 791         /* start or stop the lcdc */
 792         if (start)
 793                 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 794         else
 795                 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 796
 797         /* wait until power is applied/stopped on all channels */
 798         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 799                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 800                         while (1) {
 801                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 802                                     & LDPMR_LPS;
 803                                 if (start && tmp == LDPMR_LPS)
 804                                         break;
 805                                 if (!start && tmp == 0)
 806                                         break;
 807                                 cpu_relax();
 808                         }
 809
 810         if (!start)
 811                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 812 }
 813
 814 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 815 {
 816         const struct fb_var_screeninfo *var = &ch->info->var;
 817         const struct fb_videomode *mode = &ch->display.mode;
 818         unsigned long h_total, hsync_pos, display_h_total;
 819         u32 tmp;
 820
 821         tmp = ch->ldmt1r_value;
 822         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 823         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 824         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 825         tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 826         tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 827         tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 828         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 829         lcdc_write_chan(ch, LDMT1R, tmp);
 830
 831         /* setup SYS bus */
 832         lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 833         lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 834
 835         /* horizontal configuration */
 836         h_total = mode->xres + mode->hsync_len + mode->left_margin
 837                 + mode->right_margin;
 838         tmp = h_total / 8; /* HTCN */
 839         tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 840         lcdc_write_chan(ch, LDHCNR, tmp);
 841
 842         hsync_pos = mode->xres + mode->right_margin;
 843         tmp = hsync_pos / 8; /* HSYNP */
 844         tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 845         lcdc_write_chan(ch, LDHSYNR, tmp);
 846
 847         /* vertical configuration */
 848         tmp = mode->yres + mode->vsync_len + mode->upper_margin
 849             + mode->lower_margin; /* VTLN */
 850         tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 851         lcdc_write_chan(ch, LDVLNR, tmp);
 852
 853         tmp = mode->yres + mode->lower_margin; /* VSYNP */
 854         tmp |= mode->vsync_len << 16; /* VSYNW */
 855         lcdc_write_chan(ch, LDVSYNR, tmp);
 856
 857         /* Adjust horizontal synchronisation for HDMI */
 858         display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 859                         + mode->right_margin;
 860         tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 861             | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 862         lcdc_write_chan(ch, LDHAJR, tmp);
 863         lcdc_write_chan_mirror(ch, LDHAJR, tmp);
 864 }
 865
 866 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 867 {
 868         u32 format = 0;
 869
 870         if (!ovl->enabled) {
 871                 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 872                 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 873                 lcdc_write(ovl->channel->lcdc, LDBCR,
 874                            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 875                 return;
 876         }
 877
 878         ovl->base_addr_y = ovl->dma_handle;
 879         ovl->base_addr_c = ovl->dma_handle
 880                          + ovl->xres_virtual * ovl->yres_virtual;
 881
 882         switch (ovl->mode) {
 883         case LCDC_OVERLAY_BLEND:
 884                 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 885                 break;
 886
 887         case LCDC_OVERLAY_ROP3:
 888                 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 889                        | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 890                 break;
 891         }
 892
 893         switch (ovl->format->fourcc) {
 894         case V4L2_PIX_FMT_RGB565:
 895         case V4L2_PIX_FMT_NV21:
 896         case V4L2_PIX_FMT_NV61:
 897         case V4L2_PIX_FMT_NV42:
 898                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 899                 break;
 900         case V4L2_PIX_FMT_BGR24:
 901         case V4L2_PIX_FMT_NV12:
 902         case V4L2_PIX_FMT_NV16:
 903         case V4L2_PIX_FMT_NV24:
 904                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 905                 break;
 906         case V4L2_PIX_FMT_BGR32:
 907         default:
 908                 format |= LDBBSIFR_SWPL;
 909                 break;
 910         }
 911
 912         switch (ovl->format->fourcc) {
 913         case V4L2_PIX_FMT_RGB565:
 914                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 915                 break;
 916         case V4L2_PIX_FMT_BGR24:
 917                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 918                 break;
 919         case V4L2_PIX_FMT_BGR32:
 920                 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 921                 break;
 922         case V4L2_PIX_FMT_NV12:
 923         case V4L2_PIX_FMT_NV21:
 924                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 925                 break;
 926         case V4L2_PIX_FMT_NV16:
 927         case V4L2_PIX_FMT_NV61:
 928                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 929                 break;
 930         case V4L2_PIX_FMT_NV24:
 931         case V4L2_PIX_FMT_NV42:
 932                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 933                 break;
 934         }
 935
 936         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 937
 938         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 939
 940         lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 941                 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 942                 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 943         lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 944                 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 945                 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 946         lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 947                 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 948
 949         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 950         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 951
 952         lcdc_write(ovl->channel->lcdc, LDBCR,
 953                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 954 }
 955
 956 /*
 957  * __sh_mobile_lcdc_start - Configure and start the LCDC
 958  * @priv: LCDC device
 959  *
 960  * Configure all enabled channels and start the LCDC device. All external
 961  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 962  */
 963 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 964 {
 965         struct sh_mobile_lcdc_chan *ch;
 966         unsigned long tmp;
 967         int k, m;
 968
 969         /* Enable LCDC channels. Read data from external memory, avoid using the
 970          * BEU for now.
 971          */
 972         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 973
 974         /* Stop the LCDC first and disable all interrupts. */
 975         sh_mobile_lcdc_start_stop(priv, 0);
 976         lcdc_write(priv, _LDINTR, 0);
 977
 978         /* Configure power supply, dot clocks and start them. */
 979         tmp = priv->lddckr;
 980         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 981                 ch = &priv->ch[k];
 982                 if (!ch->enabled)
 983                         continue;
 984
 985                 /* Power supply */
 986                 lcdc_write_chan(ch, LDPMR, 0);
 987
 988                 m = ch->cfg->clock_divider;
 989                 if (!m)
 990                         continue;
 991
 992                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 993                  * denominator.
 994                  */
 995                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 996                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 997
 998                 if (m == 1)
 999                         m = LDDCKR_MOSEL;
1000                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
1001         }
1002
1003         lcdc_write(priv, _LDDCKR, tmp);
1004         lcdc_write(priv, _LDDCKSTPR, 0);
1005         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1006
1007         /* Setup geometry, format, frame buffer memory and operation mode. */
1008         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1009                 ch = &priv->ch[k];
1010                 if (!ch->enabled)
1011                         continue;
1012
1013                 sh_mobile_lcdc_geometry(ch);
1014
1015                 tmp = ch->format->lddfr;
1016
1017                 if (ch->format->yuv) {
1018                         switch (ch->colorspace) {
1019                         case V4L2_COLORSPACE_REC709:
1020                                 tmp |= LDDFR_CF1;
1021                                 break;
1022                         case V4L2_COLORSPACE_JPEG:
1023                                 tmp |= LDDFR_CF0;
1024                                 break;
1025                         }
1026                 }
1027
1028                 lcdc_write_chan(ch, LDDFR, tmp);
1029                 lcdc_write_chan(ch, LDMLSR, ch->line_size);
1030                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1031                 if (ch->format->yuv)
1032                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1033
1034                 /* When using deferred I/O mode, configure the LCDC for one-shot
1035                  * operation and enable the frame end interrupt. Otherwise use
1036                  * continuous read mode.
1037                  */
1038                 if (ch->ldmt1r_value & LDMT1R_IFM &&
1039                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
1040                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1041                         lcdc_write(priv, _LDINTR, LDINTR_FE);
1042                 } else {
1043                         lcdc_write_chan(ch, LDSM1R, 0);
1044                 }
1045         }
1046
1047         /* Word and long word swap. */
1048         switch (priv->ch[0].format->fourcc) {
1049         case V4L2_PIX_FMT_RGB565:
1050         case V4L2_PIX_FMT_NV21:
1051         case V4L2_PIX_FMT_NV61:
1052         case V4L2_PIX_FMT_NV42:
1053                 tmp = LDDDSR_LS | LDDDSR_WS;
1054                 break;
1055         case V4L2_PIX_FMT_BGR24:
1056         case V4L2_PIX_FMT_NV12:
1057         case V4L2_PIX_FMT_NV16:
1058         case V4L2_PIX_FMT_NV24:
1059                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1060                 break;
1061         case V4L2_PIX_FMT_BGR32:
1062         default:
1063                 tmp = LDDDSR_LS;
1064                 break;
1065         }
1066         lcdc_write(priv, _LDDDSR, tmp);
1067
1068         /* Enable the display output. */
1069         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1070         sh_mobile_lcdc_start_stop(priv, 1);
1071         priv->started = 1;
1072 }
1073
1074 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1075 {
1076         struct sh_mobile_meram_info *mdev = priv->meram_dev;
1077         struct sh_mobile_lcdc_chan *ch;
1078         unsigned long tmp;
1079         int ret;
1080         int k;
1081
1082         /* enable clocks before accessing the hardware */
1083         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1084                 if (priv->ch[k].enabled)
1085                         sh_mobile_lcdc_clk_on(priv);
1086         }
1087
1088         /* reset */
1089         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1090         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1091
1092         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1093                 const struct sh_mobile_lcdc_panel_cfg *panel;
1094
1095                 ch = &priv->ch[k];
1096                 if (!ch->enabled)
1097                         continue;
1098
1099                 panel = &ch->cfg->panel_cfg;
1100                 if (panel->setup_sys) {
1101                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1102                         if (ret)
1103                                 return ret;
1104                 }
1105         }
1106
1107         /* Compute frame buffer base address and pitch for each channel. */
1108         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1109                 int pixelformat;
1110                 void *cache;
1111
1112                 ch = &priv->ch[k];
1113                 if (!ch->enabled)
1114                         continue;
1115
1116                 ch->base_addr_y = ch->dma_handle;
1117                 ch->base_addr_c = ch->dma_handle
1118                                 + ch->xres_virtual * ch->yres_virtual;
1119                 ch->line_size = ch->pitch;
1120
1121                 /* Enable MERAM if possible. */
1122                 if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1123                         continue;
1124
1125                 /* Free the allocated MERAM cache. */
1126                 if (ch->cache) {
1127                         sh_mobile_meram_cache_free(mdev, ch->cache);
1128                         ch->cache = NULL;
1129                 }
1130
1131                 switch (ch->format->fourcc) {
1132                 case V4L2_PIX_FMT_NV12:
1133                 case V4L2_PIX_FMT_NV21:
1134                 case V4L2_PIX_FMT_NV16:
1135                 case V4L2_PIX_FMT_NV61:
1136                         pixelformat = SH_MOBILE_MERAM_PF_NV;
1137                         break;
1138                 case V4L2_PIX_FMT_NV24:
1139                 case V4L2_PIX_FMT_NV42:
1140                         pixelformat = SH_MOBILE_MERAM_PF_NV24;
1141                         break;
1142                 case V4L2_PIX_FMT_RGB565:
1143                 case V4L2_PIX_FMT_BGR24:
1144                 case V4L2_PIX_FMT_BGR32:
1145                 default:
1146                         pixelformat = SH_MOBILE_MERAM_PF_RGB;
1147                         break;
1148                 }
1149
1150                 cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1151                                         ch->pitch, ch->yres, pixelformat,
1152                                         &ch->line_size);
1153                 if (!IS_ERR(cache)) {
1154                         sh_mobile_meram_cache_update(mdev, cache,
1155                                         ch->base_addr_y, ch->base_addr_c,
1156                                         &ch->base_addr_y, &ch->base_addr_c);
1157                         ch->cache = cache;
1158                 }
1159         }
1160
1161         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1162                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1163                 sh_mobile_lcdc_overlay_setup(ovl);
1164         }
1165
1166         /* Start the LCDC. */
1167         __sh_mobile_lcdc_start(priv);
1168
1169         /* Setup deferred I/O, tell the board code to enable the panels, and
1170          * turn backlight on.
1171          */
1172         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1173                 ch = &priv->ch[k];
1174                 if (!ch->enabled)
1175                         continue;
1176
1177                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1178                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1179                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1180                         ch->defio.delay = msecs_to_jiffies(tmp);
1181                         ch->info->fbdefio = &ch->defio;
1182                         fb_deferred_io_init(ch->info);
1183                 }
1184
1185                 sh_mobile_lcdc_display_on(ch);
1186
1187                 if (ch->bl) {
1188                         ch->bl->props.power = FB_BLANK_UNBLANK;
1189                         backlight_update_status(ch->bl);
1190                 }
1191         }
1192
1193         return 0;
1194 }
1195
1196 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1197 {
1198         struct sh_mobile_lcdc_chan *ch;
1199         int k;
1200
1201         /* clean up deferred io and ask board code to disable panel */
1202         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1203                 ch = &priv->ch[k];
1204                 if (!ch->enabled)
1205                         continue;
1206
1207                 /* deferred io mode:
1208                  * flush frame, and wait for frame end interrupt
1209                  * clean up deferred io and enable clock
1210                  */
1211                 if (ch->info && ch->info->fbdefio) {
1212                         ch->frame_end = 0;
1213                         schedule_delayed_work(&ch->info->deferred_work, 0);
1214                         wait_event(ch->frame_end_wait, ch->frame_end);
1215                         fb_deferred_io_cleanup(ch->info);
1216                         ch->info->fbdefio = NULL;
1217                         sh_mobile_lcdc_clk_on(priv);
1218                 }
1219
1220                 if (ch->bl) {
1221                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1222                         backlight_update_status(ch->bl);
1223                 }
1224
1225                 sh_mobile_lcdc_display_off(ch);
1226
1227                 /* Free the MERAM cache. */
1228                 if (ch->cache) {
1229                         sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1230                         ch->cache = NULL;
1231                 }
1232
1233         }
1234
1235         /* stop the lcdc */
1236         if (priv->started) {
1237                 sh_mobile_lcdc_start_stop(priv, 0);
1238                 priv->started = 0;
1239         }
1240
1241         /* stop clocks */
1242         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1243                 if (priv->ch[k].enabled)
1244                         sh_mobile_lcdc_clk_off(priv);
1245 }
1246
1247 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1248                                       struct fb_info *info)
1249 {
1250         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1251                 return -EINVAL;
1252
1253         /* Make sure the virtual resolution is at least as big as the visible
1254          * resolution.
1255          */
1256         if (var->xres_virtual < var->xres)
1257                 var->xres_virtual = var->xres;
1258         if (var->yres_virtual < var->yres)
1259                 var->yres_virtual = var->yres;
1260
1261         if (sh_mobile_format_is_fourcc(var)) {
1262                 const struct sh_mobile_lcdc_format_info *format;
1263
1264                 format = sh_mobile_format_info(var->grayscale);
1265                 if (format == NULL)
1266                         return -EINVAL;
1267                 var->bits_per_pixel = format->bpp;
1268
1269                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1270                  * respectively.
1271                  */
1272                 if (!format->yuv)
1273                         var->colorspace = V4L2_COLORSPACE_SRGB;
1274                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1275                         var->colorspace = V4L2_COLORSPACE_JPEG;
1276         } else {
1277                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1278                         var->bits_per_pixel = 16;
1279                         var->red.offset = 11;
1280                         var->red.length = 5;
1281                         var->green.offset = 5;
1282                         var->green.length = 6;
1283                         var->blue.offset = 0;
1284                         var->blue.length = 5;
1285                         var->transp.offset = 0;
1286                         var->transp.length = 0;
1287                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1288                         var->bits_per_pixel = 24;
1289                         var->red.offset = 16;
1290                         var->red.length = 8;
1291                         var->green.offset = 8;
1292                         var->green.length = 8;
1293                         var->blue.offset = 0;
1294                         var->blue.length = 8;
1295                         var->transp.offset = 0;
1296                         var->transp.length = 0;
1297                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1298                         var->bits_per_pixel = 32;
1299                         var->red.offset = 16;
1300                         var->red.length = 8;
1301                         var->green.offset = 8;
1302                         var->green.length = 8;
1303                         var->blue.offset = 0;
1304                         var->blue.length = 8;
1305                         var->transp.offset = 24;
1306                         var->transp.length = 8;
1307                 } else
1308                         return -EINVAL;
1309
1310                 var->red.msb_right = 0;
1311                 var->green.msb_right = 0;
1312                 var->blue.msb_right = 0;
1313                 var->transp.msb_right = 0;
1314         }
1315
1316         /* Make sure we don't exceed our allocated memory. */
1317         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1318             info->fix.smem_len)
1319                 return -EINVAL;
1320
1321         return 0;
1322 }
1323
1324 /* -----------------------------------------------------------------------------
1325  * Frame buffer operations - Overlays
1326  */
1327
1328 static ssize_t
1329 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1330 {
1331         struct fb_info *info = dev_get_drvdata(dev);
1332         struct sh_mobile_lcdc_overlay *ovl = info->par;
1333
1334         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1335 }
1336
1337 static ssize_t
1338 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1339                     const char *buf, size_t count)
1340 {
1341         struct fb_info *info = dev_get_drvdata(dev);
1342         struct sh_mobile_lcdc_overlay *ovl = info->par;
1343         unsigned int alpha;
1344         char *endp;
1345
1346         alpha = simple_strtoul(buf, &endp, 10);
1347         if (isspace(*endp))
1348                 endp++;
1349
1350         if (endp - buf != count)
1351                 return -EINVAL;
1352
1353         if (alpha > 255)
1354                 return -EINVAL;
1355
1356         if (ovl->alpha != alpha) {
1357                 ovl->alpha = alpha;
1358
1359                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1360                         sh_mobile_lcdc_overlay_setup(ovl);
1361         }
1362
1363         return count;
1364 }
1365
1366 static ssize_t
1367 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1368 {
1369         struct fb_info *info = dev_get_drvdata(dev);
1370         struct sh_mobile_lcdc_overlay *ovl = info->par;
1371
1372         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1373 }
1374
1375 static ssize_t
1376 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1377                    const char *buf, size_t count)
1378 {
1379         struct fb_info *info = dev_get_drvdata(dev);
1380         struct sh_mobile_lcdc_overlay *ovl = info->par;
1381         unsigned int mode;
1382         char *endp;
1383
1384         mode = simple_strtoul(buf, &endp, 10);
1385         if (isspace(*endp))
1386                 endp++;
1387
1388         if (endp - buf != count)
1389                 return -EINVAL;
1390
1391         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1392                 return -EINVAL;
1393
1394         if (ovl->mode != mode) {
1395                 ovl->mode = mode;
1396
1397                 if (ovl->enabled)
1398                         sh_mobile_lcdc_overlay_setup(ovl);
1399         }
1400
1401         return count;
1402 }
1403
1404 static ssize_t
1405 overlay_position_show(struct device *dev, struct device_attribute *attr,
1406                       char *buf)
1407 {
1408         struct fb_info *info = dev_get_drvdata(dev);
1409         struct sh_mobile_lcdc_overlay *ovl = info->par;
1410
1411         return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1412 }
1413
1414 static ssize_t
1415 overlay_position_store(struct device *dev, struct device_attribute *attr,
1416                        const char *buf, size_t count)
1417 {
1418         struct fb_info *info = dev_get_drvdata(dev);
1419         struct sh_mobile_lcdc_overlay *ovl = info->par;
1420         char *endp;
1421         int pos_x;
1422         int pos_y;
1423
1424         pos_x = simple_strtol(buf, &endp, 10);
1425         if (*endp != ',')
1426                 return -EINVAL;
1427
1428         pos_y = simple_strtol(endp + 1, &endp, 10);
1429         if (isspace(*endp))
1430                 endp++;
1431
1432         if (endp - buf != count)
1433                 return -EINVAL;
1434
1435         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1436                 ovl->pos_x = pos_x;
1437                 ovl->pos_y = pos_y;
1438
1439                 if (ovl->enabled)
1440                         sh_mobile_lcdc_overlay_setup(ovl);
1441         }
1442
1443         return count;
1444 }
1445
1446 static ssize_t
1447 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1448 {
1449         struct fb_info *info = dev_get_drvdata(dev);
1450         struct sh_mobile_lcdc_overlay *ovl = info->par;
1451
1452         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1453 }
1454
1455 static ssize_t
1456 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1457                     const char *buf, size_t count)
1458 {
1459         struct fb_info *info = dev_get_drvdata(dev);
1460         struct sh_mobile_lcdc_overlay *ovl = info->par;
1461         unsigned int rop3;
1462         char *endp;
1463
1464         rop3 = simple_strtoul(buf, &endp, 10);
1465         if (isspace(*endp))
1466                 endp++;
1467
1468         if (endp - buf != count)
1469                 return -EINVAL;
1470
1471         if (rop3 > 255)
1472                 return -EINVAL;
1473
1474         if (ovl->rop3 != rop3) {
1475                 ovl->rop3 = rop3;
1476
1477                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1478                         sh_mobile_lcdc_overlay_setup(ovl);
1479         }
1480
1481         return count;
1482 }
1483
1484 static const struct device_attribute overlay_sysfs_attrs[] = {
1485         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1486                overlay_alpha_show, overlay_alpha_store),
1487         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1488                overlay_mode_show, overlay_mode_store),
1489         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1490                overlay_position_show, overlay_position_store),
1491         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1492                overlay_rop3_show, overlay_rop3_store),
1493 };
1494
1495 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1496         .id =           "SH Mobile LCDC",
1497         .type =         FB_TYPE_PACKED_PIXELS,
1498         .visual =       FB_VISUAL_TRUECOLOR,
1499         .accel =        FB_ACCEL_NONE,
1500         .xpanstep =     1,
1501         .ypanstep =     1,
1502         .ywrapstep =    0,
1503         .capabilities = FB_CAP_FOURCC,
1504 };
1505
1506 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1507                                     struct fb_info *info)
1508 {
1509         struct sh_mobile_lcdc_overlay *ovl = info->par;
1510         unsigned long base_addr_y;
1511         unsigned long base_addr_c;
1512         unsigned long y_offset;
1513         unsigned long c_offset;
1514
1515         if (!ovl->format->yuv) {
1516                 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1517                          * ovl->format->bpp / 8;
1518                 c_offset = 0;
1519         } else {
1520                 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1521                 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1522
1523                 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1524                 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1525                          + var->xoffset * 2 / xsub;
1526         }
1527
1528         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1529          * nothing to do in that case.
1530          */
1531         if (y_offset == ovl->pan_y_offset)
1532                 return 0;
1533
1534         /* Set the source address for the next refresh */
1535         base_addr_y = ovl->dma_handle + y_offset;
1536         base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1537                     + c_offset;
1538
1539         ovl->base_addr_y = base_addr_y;
1540         ovl->base_addr_c = base_addr_c;
1541         ovl->pan_y_offset = y_offset;
1542
1543         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1544
1545         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1546         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1547
1548         lcdc_write(ovl->channel->lcdc, LDBCR,
1549                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1550
1551         return 0;
1552 }
1553
1554 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1555                                       unsigned long arg)
1556 {
1557         struct sh_mobile_lcdc_overlay *ovl = info->par;
1558
1559         switch (cmd) {
1560         case FBIO_WAITFORVSYNC:
1561                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1562
1563         default:
1564                 return -ENOIOCTLCMD;
1565         }
1566 }
1567
1568 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1569                                           struct fb_info *info)
1570 {
1571         return __sh_mobile_lcdc_check_var(var, info);
1572 }
1573
1574 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1575 {
1576         struct sh_mobile_lcdc_overlay *ovl = info->par;
1577
1578         ovl->format =
1579                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1580
1581         ovl->xres = info->var.xres;
1582         ovl->xres_virtual = info->var.xres_virtual;
1583         ovl->yres = info->var.yres;
1584         ovl->yres_virtual = info->var.yres_virtual;
1585
1586         if (ovl->format->yuv)
1587                 ovl->pitch = info->var.xres_virtual;
1588         else
1589                 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1590
1591         sh_mobile_lcdc_overlay_setup(ovl);
1592
1593         info->fix.line_length = ovl->pitch;
1594
1595         if (sh_mobile_format_is_fourcc(&info->var)) {
1596                 info->fix.type = FB_TYPE_FOURCC;
1597                 info->fix.visual = FB_VISUAL_FOURCC;
1598         } else {
1599                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1600                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1601         }
1602
1603         return 0;
1604 }
1605
1606 /* Overlay blanking. Disable the overlay when blanked. */
1607 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1608 {
1609         struct sh_mobile_lcdc_overlay *ovl = info->par;
1610
1611         ovl->enabled = !blank;
1612         sh_mobile_lcdc_overlay_setup(ovl);
1613
1614         /* Prevent the backlight from receiving a blanking event by returning
1615          * a non-zero value.
1616          */
1617         return 1;
1618 }
1619
1620 static int
1621 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1622 {
1623         struct sh_mobile_lcdc_overlay *ovl = info->par;
1624
1625         return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1626                                  ovl->dma_handle, ovl->fb_size);
1627 }
1628
1629 static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1630         .owner          = THIS_MODULE,
1631         .fb_read        = fb_sys_read,
1632         .fb_write       = fb_sys_write,
1633         .fb_fillrect    = sys_fillrect,
1634         .fb_copyarea    = sys_copyarea,
1635         .fb_imageblit   = sys_imageblit,
1636         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1637         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1638         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1639         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1640         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1641         .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1642 };
1643
1644 static void
1645 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1646 {
1647         struct fb_info *info = ovl->info;
1648
1649         if (info == NULL || info->dev == NULL)
1650                 return;
1651
1652         unregister_framebuffer(ovl->info);
1653 }
1654
1655 static int
1656 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1657 {
1658         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1659         struct fb_info *info = ovl->info;
1660         unsigned int i;
1661         int ret;
1662
1663         if (info == NULL)
1664                 return 0;
1665
1666         ret = register_framebuffer(info);
1667         if (ret < 0)
1668                 return ret;
1669
1670         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1671                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1672                  info->var.yres, info->var.bits_per_pixel);
1673
1674         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1675                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1676                 if (ret < 0)
1677                         return ret;
1678         }
1679
1680         return 0;
1681 }
1682
1683 static void
1684 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1685 {
1686         struct fb_info *info = ovl->info;
1687
1688         if (info == NULL || info->device == NULL)
1689                 return;
1690
1691         framebuffer_release(info);
1692 }
1693
1694 static int
1695 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1696 {
1697         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1698         struct fb_var_screeninfo *var;
1699         struct fb_info *info;
1700
1701         /* Allocate and initialize the frame buffer device. */
1702         info = framebuffer_alloc(0, priv->dev);
1703         if (info == NULL) {
1704                 dev_err(priv->dev, "unable to allocate fb_info\n");
1705                 return -ENOMEM;
1706         }
1707
1708         ovl->info = info;
1709
1710         info->flags = FBINFO_FLAG_DEFAULT;
1711         info->fbops = &sh_mobile_lcdc_overlay_ops;
1712         info->device = priv->dev;
1713         info->screen_base = ovl->fb_mem;
1714         info->par = ovl;
1715
1716         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1717          * for NV12 and NV21.
1718          */
1719         info->fix = sh_mobile_lcdc_overlay_fix;
1720         snprintf(info->fix.id, sizeof(info->fix.id),
1721                  "SH Mobile LCDC Overlay %u", ovl->index);
1722         info->fix.smem_start = ovl->dma_handle;
1723         info->fix.smem_len = ovl->fb_size;
1724         info->fix.line_length = ovl->pitch;
1725
1726         if (ovl->format->yuv)
1727                 info->fix.visual = FB_VISUAL_FOURCC;
1728         else
1729                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1730
1731         switch (ovl->format->fourcc) {
1732         case V4L2_PIX_FMT_NV12:
1733         case V4L2_PIX_FMT_NV21:
1734                 info->fix.ypanstep = 2;
1735         case V4L2_PIX_FMT_NV16:
1736         case V4L2_PIX_FMT_NV61:
1737                 info->fix.xpanstep = 2;
1738         }
1739
1740         /* Initialize variable screen information. */
1741         var = &info->var;
1742         memset(var, 0, sizeof(*var));
1743         var->xres = ovl->xres;
1744         var->yres = ovl->yres;
1745         var->xres_virtual = ovl->xres_virtual;
1746         var->yres_virtual = ovl->yres_virtual;
1747         var->activate = FB_ACTIVATE_NOW;
1748
1749         /* Use the legacy API by default for RGB formats, and the FOURCC API
1750          * for YUV formats.
1751          */
1752         if (!ovl->format->yuv)
1753                 var->bits_per_pixel = ovl->format->bpp;
1754         else
1755                 var->grayscale = ovl->format->fourcc;
1756
1757         return sh_mobile_lcdc_overlay_check_var(var, info);
1758 }
1759
1760 /* -----------------------------------------------------------------------------
1761  * Frame buffer operations - main frame buffer
1762  */
1763
1764 static int sh_mobile_lcdc_setcolreg(u_int regno,
1765                                     u_int red, u_int green, u_int blue,
1766                                     u_int transp, struct fb_info *info)
1767 {
1768         u32 *palette = info->pseudo_palette;
1769
1770         if (regno >= PALETTE_NR)
1771                 return -EINVAL;
1772
1773         /* only FB_VISUAL_TRUECOLOR supported */
1774
1775         red >>= 16 - info->var.red.length;
1776         green >>= 16 - info->var.green.length;
1777         blue >>= 16 - info->var.blue.length;
1778         transp >>= 16 - info->var.transp.length;
1779
1780         palette[regno] = (red << info->var.red.offset) |
1781           (green << info->var.green.offset) |
1782           (blue << info->var.blue.offset) |
1783           (transp << info->var.transp.offset);
1784
1785         return 0;
1786 }
1787
1788 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1789         .id =           "SH Mobile LCDC",
1790         .type =         FB_TYPE_PACKED_PIXELS,
1791         .visual =       FB_VISUAL_TRUECOLOR,
1792         .accel =        FB_ACCEL_NONE,
1793         .xpanstep =     1,
1794         .ypanstep =     1,
1795         .ywrapstep =    0,
1796         .capabilities = FB_CAP_FOURCC,
1797 };
1798
1799 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1800                                     const struct fb_fillrect *rect)
1801 {
1802         sys_fillrect(info, rect);
1803         sh_mobile_lcdc_deferred_io_touch(info);
1804 }
1805
1806 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1807                                     const struct fb_copyarea *area)
1808 {
1809         sys_copyarea(info, area);
1810         sh_mobile_lcdc_deferred_io_touch(info);
1811 }
1812
1813 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1814                                      const struct fb_image *image)
1815 {
1816         sys_imageblit(info, image);
1817         sh_mobile_lcdc_deferred_io_touch(info);
1818 }
1819
1820 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1821                               struct fb_info *info)
1822 {
1823         struct sh_mobile_lcdc_chan *ch = info->par;
1824         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1825         unsigned long ldrcntr;
1826         unsigned long base_addr_y, base_addr_c;
1827         unsigned long y_offset;
1828         unsigned long c_offset;
1829
1830         if (!ch->format->yuv) {
1831                 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1832                          * ch->format->bpp / 8;
1833                 c_offset = 0;
1834         } else {
1835                 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1836                 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1837
1838                 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1839                 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1840                          + var->xoffset * 2 / xsub;
1841         }
1842
1843         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1844          * nothing to do in that case.
1845          */
1846         if (y_offset == ch->pan_y_offset)
1847                 return 0;
1848
1849         /* Set the source address for the next refresh */
1850         base_addr_y = ch->dma_handle + y_offset;
1851         base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1852                     + c_offset;
1853
1854         if (ch->cache)
1855                 sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1856                                              base_addr_y, base_addr_c,
1857                                              &base_addr_y, &base_addr_c);
1858
1859         ch->base_addr_y = base_addr_y;
1860         ch->base_addr_c = base_addr_c;
1861         ch->pan_y_offset = y_offset;
1862
1863         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1864         if (ch->format->yuv)
1865                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1866
1867         ldrcntr = lcdc_read(priv, _LDRCNTR);
1868         if (lcdc_chan_is_sublcd(ch))
1869                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1870         else
1871                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1872
1873
1874         sh_mobile_lcdc_deferred_io_touch(info);
1875
1876         return 0;
1877 }
1878
1879 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1880                                 unsigned long arg)
1881 {
1882         struct sh_mobile_lcdc_chan *ch = info->par;
1883         int retval;
1884
1885         switch (cmd) {
1886         case FBIO_WAITFORVSYNC:
1887                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1888                 break;
1889
1890         default:
1891                 retval = -ENOIOCTLCMD;
1892                 break;
1893         }
1894         return retval;
1895 }
1896
1897 static void sh_mobile_fb_reconfig(struct fb_info *info)
1898 {
1899         struct sh_mobile_lcdc_chan *ch = info->par;
1900         struct fb_var_screeninfo var;
1901         struct fb_videomode mode;
1902         struct fb_event event;
1903         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1904
1905         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1906                 /* More framebuffer users are active */
1907                 return;
1908
1909         fb_var_to_videomode(&mode, &info->var);
1910
1911         if (fb_mode_is_equal(&ch->display.mode, &mode))
1912                 return;
1913
1914         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1915         var = info->var;
1916         fb_videomode_to_var(&var, &ch->display.mode);
1917         var.width = ch->display.width;
1918         var.height = ch->display.height;
1919         var.activate = FB_ACTIVATE_NOW;
1920
1921         if (fb_set_var(info, &var) < 0)
1922                 /* Couldn't reconfigure, hopefully, can continue as before */
1923                 return;
1924
1925         /*
1926          * fb_set_var() calls the notifier change internally, only if
1927          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1928          * user event, we have to call the chain ourselves.
1929          */
1930         event.info = info;
1931         event.data = &ch->display.mode;
1932         fb_notifier_call_chain(evnt, &event);
1933 }
1934
1935 /*
1936  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1937  * user == 1, or with console sem held, if user == 0.
1938  */
1939 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1940 {
1941         struct sh_mobile_lcdc_chan *ch = info->par;
1942
1943         mutex_lock(&ch->open_lock);
1944         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1945
1946         ch->use_count--;
1947
1948         /* Nothing to reconfigure, when called from fbcon */
1949         if (user) {
1950                 console_lock();
1951                 sh_mobile_fb_reconfig(info);
1952                 console_unlock();
1953         }
1954
1955         mutex_unlock(&ch->open_lock);
1956
1957         return 0;
1958 }
1959
1960 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1961 {
1962         struct sh_mobile_lcdc_chan *ch = info->par;
1963
1964         mutex_lock(&ch->open_lock);
1965         ch->use_count++;
1966
1967         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1968         mutex_unlock(&ch->open_lock);
1969
1970         return 0;
1971 }
1972
1973 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1974                                     struct fb_info *info)
1975 {
1976         struct sh_mobile_lcdc_chan *ch = info->par;
1977         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1978         unsigned int best_dist = (unsigned int)-1;
1979         unsigned int best_xres = 0;
1980         unsigned int best_yres = 0;
1981         unsigned int i;
1982         int ret;
1983
1984         /* If board code provides us with a list of available modes, make sure
1985          * we use one of them. Find the mode closest to the requested one. The
1986          * distance between two modes is defined as the size of the
1987          * non-overlapping parts of the two rectangles.
1988          */
1989         for (i = 0; i < ch->cfg->num_modes; ++i) {
1990                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1991                 unsigned int dist;
1992
1993                 /* We can only round up. */
1994                 if (var->xres > mode->xres || var->yres > mode->yres)
1995                         continue;
1996
1997                 dist = var->xres * var->yres + mode->xres * mode->yres
1998                      - 2 * min(var->xres, mode->xres)
1999                          * min(var->yres, mode->yres);
2000
2001                 if (dist < best_dist) {
2002                         best_xres = mode->xres;
2003                         best_yres = mode->yres;
2004                         best_dist = dist;
2005                 }
2006         }
2007
2008         /* If no available mode can be used, return an error. */
2009         if (ch->cfg->num_modes != 0) {
2010                 if (best_dist == (unsigned int)-1)
2011                         return -EINVAL;
2012
2013                 var->xres = best_xres;
2014                 var->yres = best_yres;
2015         }
2016
2017         ret = __sh_mobile_lcdc_check_var(var, info);
2018         if (ret < 0)
2019                 return ret;
2020
2021         /* only accept the forced_fourcc for dual channel configurations */
2022         if (p->forced_fourcc &&
2023             p->forced_fourcc != sh_mobile_format_fourcc(var))
2024                 return -EINVAL;
2025
2026         return 0;
2027 }
2028
2029 static int sh_mobile_lcdc_set_par(struct fb_info *info)
2030 {
2031         struct sh_mobile_lcdc_chan *ch = info->par;
2032         int ret;
2033
2034         sh_mobile_lcdc_stop(ch->lcdc);
2035
2036         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2037         ch->colorspace = info->var.colorspace;
2038
2039         ch->xres = info->var.xres;
2040         ch->xres_virtual = info->var.xres_virtual;
2041         ch->yres = info->var.yres;
2042         ch->yres_virtual = info->var.yres_virtual;
2043
2044         if (ch->format->yuv)
2045                 ch->pitch = info->var.xres_virtual;
2046         else
2047                 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2048
2049         ret = sh_mobile_lcdc_start(ch->lcdc);
2050         if (ret < 0)
2051                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2052
2053         info->fix.line_length = ch->pitch;
2054
2055         if (sh_mobile_format_is_fourcc(&info->var)) {
2056                 info->fix.type = FB_TYPE_FOURCC;
2057                 info->fix.visual = FB_VISUAL_FOURCC;
2058         } else {
2059                 info->fix.type = FB_TYPE_PACKED_PIXELS;
2060                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2061         }
2062
2063         return ret;
2064 }
2065
2066 /*
2067  * Screen blanking. Behavior is as follows:
2068  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2069  * FB_BLANK_NORMAL: screen blanked, clocks enabled
2070  * FB_BLANK_VSYNC,
2071  * FB_BLANK_HSYNC,
2072  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2073  */
2074 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2075 {
2076         struct sh_mobile_lcdc_chan *ch = info->par;
2077         struct sh_mobile_lcdc_priv *p = ch->lcdc;
2078
2079         /* blank the screen? */
2080         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2081                 struct fb_fillrect rect = {
2082                         .width = ch->xres,
2083                         .height = ch->yres,
2084                 };
2085                 sh_mobile_lcdc_fillrect(info, &rect);
2086         }
2087         /* turn clocks on? */
2088         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2089                 sh_mobile_lcdc_clk_on(p);
2090         }
2091         /* turn clocks off? */
2092         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2093                 /* make sure the screen is updated with the black fill before
2094                  * switching the clocks off. one vsync is not enough since
2095                  * blanking may occur in the middle of a refresh. deferred io
2096                  * mode will reenable the clocks and update the screen in time,
2097                  * so it does not need this. */
2098                 if (!info->fbdefio) {
2099                         sh_mobile_lcdc_wait_for_vsync(ch);
2100                         sh_mobile_lcdc_wait_for_vsync(ch);
2101                 }
2102                 sh_mobile_lcdc_clk_off(p);
2103         }
2104
2105         ch->blank_status = blank;
2106         return 0;
2107 }
2108
2109 static int
2110 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
2111 {
2112         struct sh_mobile_lcdc_chan *ch = info->par;
2113
2114         return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
2115                                  ch->dma_handle, ch->fb_size);
2116 }
2117
2118 static struct fb_ops sh_mobile_lcdc_ops = {
2119         .owner          = THIS_MODULE,
2120         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2121         .fb_read        = fb_sys_read,
2122         .fb_write       = fb_sys_write,
2123         .fb_fillrect    = sh_mobile_lcdc_fillrect,
2124         .fb_copyarea    = sh_mobile_lcdc_copyarea,
2125         .fb_imageblit   = sh_mobile_lcdc_imageblit,
2126         .fb_blank       = sh_mobile_lcdc_blank,
2127         .fb_pan_display = sh_mobile_lcdc_pan,
2128         .fb_ioctl       = sh_mobile_lcdc_ioctl,
2129         .fb_open        = sh_mobile_lcdc_open,
2130         .fb_release     = sh_mobile_lcdc_release,
2131         .fb_check_var   = sh_mobile_lcdc_check_var,
2132         .fb_set_par     = sh_mobile_lcdc_set_par,
2133         .fb_mmap        = sh_mobile_lcdc_mmap,
2134 };
2135
2136 static void
2137 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2138 {
2139         if (ch->info && ch->info->dev)
2140                 unregister_framebuffer(ch->info);
2141 }
2142
2143 static int
2144 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2145 {
2146         struct fb_info *info = ch->info;
2147         int ret;
2148
2149         if (info->fbdefio) {
2150                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2151                                      ch->fb_size >> PAGE_SHIFT);
2152                 if (!ch->sglist) {
2153                         dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2154                         return -ENOMEM;
2155                 }
2156         }
2157
2158         info->bl_dev = ch->bl;
2159
2160         ret = register_framebuffer(info);
2161         if (ret < 0)
2162                 return ret;
2163
2164         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2165                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2166                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2167                  info->var.bits_per_pixel);
2168
2169         /* deferred io mode: disable clock to save power */
2170         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2171                 sh_mobile_lcdc_clk_off(ch->lcdc);
2172
2173         return ret;
2174 }
2175
2176 static void
2177 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2178 {
2179         struct fb_info *info = ch->info;
2180
2181         if (!info || !info->device)
2182                 return;
2183
2184         vfree(ch->sglist);
2185
2186         fb_dealloc_cmap(&info->cmap);
2187         framebuffer_release(info);
2188 }
2189
2190 static int
2191 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2192                                const struct fb_videomode *modes,
2193                                unsigned int num_modes)
2194 {
2195         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2196         struct fb_var_screeninfo *var;
2197         struct fb_info *info;
2198         int ret;
2199
2200         /* Allocate and initialize the frame buffer device. Create the modes
2201          * list and allocate the color map.
2202          */
2203         info = framebuffer_alloc(0, priv->dev);
2204         if (info == NULL) {
2205                 dev_err(priv->dev, "unable to allocate fb_info\n");
2206                 return -ENOMEM;
2207         }
2208
2209         ch->info = info;
2210
2211         info->flags = FBINFO_FLAG_DEFAULT;
2212         info->fbops = &sh_mobile_lcdc_ops;
2213         info->device = priv->dev;
2214         info->screen_base = ch->fb_mem;
2215         info->pseudo_palette = &ch->pseudo_palette;
2216         info->par = ch;
2217
2218         fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2219
2220         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2221         if (ret < 0) {
2222                 dev_err(priv->dev, "unable to allocate cmap\n");
2223                 return ret;
2224         }
2225
2226         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2227          * for NV12 and NV21.
2228          */
2229         info->fix = sh_mobile_lcdc_fix;
2230         info->fix.smem_start = ch->dma_handle;
2231         info->fix.smem_len = ch->fb_size;
2232         info->fix.line_length = ch->pitch;
2233
2234         if (ch->format->yuv)
2235                 info->fix.visual = FB_VISUAL_FOURCC;
2236         else
2237                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2238
2239         switch (ch->format->fourcc) {
2240         case V4L2_PIX_FMT_NV12:
2241         case V4L2_PIX_FMT_NV21:
2242                 info->fix.ypanstep = 2;
2243         case V4L2_PIX_FMT_NV16:
2244         case V4L2_PIX_FMT_NV61:
2245                 info->fix.xpanstep = 2;
2246         }
2247
2248         /* Initialize variable screen information using the first mode as
2249          * default.
2250          */
2251         var = &info->var;
2252         fb_videomode_to_var(var, modes);
2253         var->width = ch->display.width;
2254         var->height = ch->display.height;
2255         var->xres_virtual = ch->xres_virtual;
2256         var->yres_virtual = ch->yres_virtual;
2257         var->activate = FB_ACTIVATE_NOW;
2258
2259         /* Use the legacy API by default for RGB formats, and the FOURCC API
2260          * for YUV formats.
2261          */
2262         if (!ch->format->yuv)
2263                 var->bits_per_pixel = ch->format->bpp;
2264         else
2265                 var->grayscale = ch->format->fourcc;
2266
2267         ret = sh_mobile_lcdc_check_var(var, info);
2268         if (ret)
2269                 return ret;
2270
2271         return 0;
2272 }
2273
2274 /* -----------------------------------------------------------------------------
2275  * Backlight
2276  */
2277
2278 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2279 {
2280         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2281         int brightness = bdev->props.brightness;
2282
2283         if (bdev->props.power != FB_BLANK_UNBLANK ||
2284             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2285                 brightness = 0;
2286
2287         ch->bl_brightness = brightness;
2288         return ch->cfg->bl_info.set_brightness(brightness);
2289 }
2290
2291 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2292 {
2293         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2294
2295         return ch->bl_brightness;
2296 }
2297
2298 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2299                                    struct fb_info *info)
2300 {
2301         return (info->bl_dev == bdev);
2302 }
2303
2304 static const struct backlight_ops sh_mobile_lcdc_bl_ops = {
2305         .options        = BL_CORE_SUSPENDRESUME,
2306         .update_status  = sh_mobile_lcdc_update_bl,
2307         .get_brightness = sh_mobile_lcdc_get_brightness,
2308         .check_fb       = sh_mobile_lcdc_check_fb,
2309 };
2310
2311 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2312                                                struct sh_mobile_lcdc_chan *ch)
2313 {
2314         struct backlight_device *bl;
2315
2316         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2317                                        &sh_mobile_lcdc_bl_ops, NULL);
2318         if (IS_ERR(bl)) {
2319                 dev_err(parent, "unable to register backlight device: %ld\n",
2320                         PTR_ERR(bl));
2321                 return NULL;
2322         }
2323
2324         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2325         bl->props.brightness = bl->props.max_brightness;
2326         backlight_update_status(bl);
2327
2328         return bl;
2329 }
2330
2331 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2332 {
2333         backlight_device_unregister(bdev);
2334 }
2335
2336 /* -----------------------------------------------------------------------------
2337  * Power management
2338  */
2339
2340 static int sh_mobile_lcdc_suspend(struct device *dev)
2341 {
2342         struct platform_device *pdev = to_platform_device(dev);
2343
2344         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2345         return 0;
2346 }
2347
2348 static int sh_mobile_lcdc_resume(struct device *dev)
2349 {
2350         struct platform_device *pdev = to_platform_device(dev);
2351
2352         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2353 }
2354
2355 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2356 {
2357         struct platform_device *pdev = to_platform_device(dev);
2358         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2359
2360         /* turn off LCDC hardware */
2361         lcdc_write(priv, _LDCNT1R, 0);
2362
2363         return 0;
2364 }
2365
2366 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2367 {
2368         struct platform_device *pdev = to_platform_device(dev);
2369         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2370
2371         __sh_mobile_lcdc_start(priv);
2372
2373         return 0;
2374 }
2375
2376 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2377         .suspend = sh_mobile_lcdc_suspend,
2378         .resume = sh_mobile_lcdc_resume,
2379         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2380         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2381 };
2382
2383 /* -----------------------------------------------------------------------------
2384  * Framebuffer notifier
2385  */
2386
2387 /* locking: called with info->lock held */
2388 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2389                                  unsigned long action, void *data)
2390 {
2391         struct fb_event *event = data;
2392         struct fb_info *info = event->info;
2393         struct sh_mobile_lcdc_chan *ch = info->par;
2394
2395         if (&ch->lcdc->notifier != nb)
2396                 return NOTIFY_DONE;
2397
2398         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2399                 __func__, action, event->data);
2400
2401         switch(action) {
2402         case FB_EVENT_SUSPEND:
2403                 sh_mobile_lcdc_display_off(ch);
2404                 sh_mobile_lcdc_stop(ch->lcdc);
2405                 break;
2406         case FB_EVENT_RESUME:
2407                 mutex_lock(&ch->open_lock);
2408                 sh_mobile_fb_reconfig(info);
2409                 mutex_unlock(&ch->open_lock);
2410
2411                 sh_mobile_lcdc_display_on(ch);
2412                 sh_mobile_lcdc_start(ch->lcdc);
2413         }
2414
2415         return NOTIFY_OK;
2416 }
2417
2418 /* -----------------------------------------------------------------------------
2419  * Probe/remove and driver init/exit
2420  */
2421
2422 static const struct fb_videomode default_720p = {
2423         .name = "HDMI 720p",
2424         .xres = 1280,
2425         .yres = 720,
2426
2427         .left_margin = 220,
2428         .right_margin = 110,
2429         .hsync_len = 40,
2430
2431         .upper_margin = 20,
2432         .lower_margin = 5,
2433         .vsync_len = 5,
2434
2435         .pixclock = 13468,
2436         .refresh = 60,
2437         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2438 };
2439
2440 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2441 {
2442         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2443         unsigned int i;
2444
2445         fb_unregister_client(&priv->notifier);
2446
2447         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2448                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2449         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2450                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2451
2452         sh_mobile_lcdc_stop(priv);
2453
2454         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2455                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2456
2457                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2458
2459                 if (ovl->fb_mem)
2460                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2461                                           ovl->fb_mem, ovl->dma_handle);
2462         }
2463
2464         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2465                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2466
2467                 if (ch->tx_dev) {
2468                         ch->tx_dev->lcdc = NULL;
2469                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2470                 }
2471
2472                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2473
2474                 if (ch->fb_mem)
2475                         dma_free_coherent(&pdev->dev, ch->fb_size,
2476                                           ch->fb_mem, ch->dma_handle);
2477         }
2478
2479         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2480                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2481
2482                 if (ch->bl)
2483                         sh_mobile_lcdc_bl_remove(ch->bl);
2484                 mutex_destroy(&ch->open_lock);
2485         }
2486
2487         if (priv->dot_clk) {
2488                 pm_runtime_disable(&pdev->dev);
2489                 clk_put(priv->dot_clk);
2490         }
2491
2492         if (priv->base)
2493                 iounmap(priv->base);
2494
2495         if (priv->irq)
2496                 free_irq(priv->irq, priv);
2497         kfree(priv);
2498         return 0;
2499 }
2500
2501 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2502 {
2503         int interface_type = ch->cfg->interface_type;
2504
2505         switch (interface_type) {
2506         case RGB8:
2507         case RGB9:
2508         case RGB12A:
2509         case RGB12B:
2510         case RGB16:
2511         case RGB18:
2512         case RGB24:
2513         case SYS8A:
2514         case SYS8B:
2515         case SYS8C:
2516         case SYS8D:
2517         case SYS9:
2518         case SYS12:
2519         case SYS16A:
2520         case SYS16B:
2521         case SYS16C:
2522         case SYS18:
2523         case SYS24:
2524                 break;
2525         default:
2526                 return -EINVAL;
2527         }
2528
2529         /* SUBLCD only supports SYS interface */
2530         if (lcdc_chan_is_sublcd(ch)) {
2531                 if (!(interface_type & LDMT1R_IFM))
2532                         return -EINVAL;
2533
2534                 interface_type &= ~LDMT1R_IFM;
2535         }
2536
2537         ch->ldmt1r_value = interface_type;
2538         return 0;
2539 }
2540
2541 static int
2542 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2543 {
2544         const struct sh_mobile_lcdc_format_info *format;
2545         struct device *dev = ovl->channel->lcdc->dev;
2546         int ret;
2547
2548         if (ovl->cfg->fourcc == 0)
2549                 return 0;
2550
2551         /* Validate the format. */
2552         format = sh_mobile_format_info(ovl->cfg->fourcc);
2553         if (format == NULL) {
2554                 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2555                 return -EINVAL;
2556         }
2557
2558         ovl->enabled = false;
2559         ovl->mode = LCDC_OVERLAY_BLEND;
2560         ovl->alpha = 255;
2561         ovl->rop3 = 0;
2562         ovl->pos_x = 0;
2563         ovl->pos_y = 0;
2564
2565         /* The default Y virtual resolution is twice the panel size to allow for
2566          * double-buffering.
2567          */
2568         ovl->format = format;
2569         ovl->xres = ovl->cfg->max_xres;
2570         ovl->xres_virtual = ovl->xres;
2571         ovl->yres = ovl->cfg->max_yres;
2572         ovl->yres_virtual = ovl->yres * 2;
2573
2574         if (!format->yuv)
2575                 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2576         else
2577                 ovl->pitch = ovl->xres_virtual;
2578
2579         /* Allocate frame buffer memory. */
2580         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2581                        * format->bpp / 8 * 2;
2582         ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2583                                          GFP_KERNEL);
2584         if (!ovl->fb_mem) {
2585                 dev_err(dev, "unable to allocate buffer\n");
2586                 return -ENOMEM;
2587         }
2588
2589         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2590         if (ret < 0)
2591                 return ret;
2592
2593         return 0;
2594 }
2595
2596 static int
2597 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2598 {
2599         const struct sh_mobile_lcdc_format_info *format;
2600         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2601         struct device *dev = ch->lcdc->dev;
2602         const struct fb_videomode *max_mode;
2603         const struct fb_videomode *mode;
2604         unsigned int num_modes;
2605         unsigned int max_size;
2606         unsigned int i;
2607
2608         ch->notify = sh_mobile_lcdc_display_notify;
2609
2610         /* Validate the format. */
2611         format = sh_mobile_format_info(cfg->fourcc);
2612         if (format == NULL) {
2613                 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2614                 return -EINVAL;
2615         }
2616
2617         /* Iterate through the modes to validate them and find the highest
2618          * resolution.
2619          */
2620         max_mode = NULL;
2621         max_size = 0;
2622
2623         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2624                 unsigned int size = mode->yres * mode->xres;
2625
2626                 /* NV12/NV21 buffers must have even number of lines */
2627                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2628                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2629                         dev_err(dev, "yres must be multiple of 2 for "
2630                                 "YCbCr420 mode.\n");
2631                         return -EINVAL;
2632                 }
2633
2634                 if (size > max_size) {
2635                         max_mode = mode;
2636                         max_size = size;
2637                 }
2638         }
2639
2640         if (!max_size)
2641                 max_size = MAX_XRES * MAX_YRES;
2642         else
2643                 dev_dbg(dev, "Found largest videomode %ux%u\n",
2644                         max_mode->xres, max_mode->yres);
2645
2646         if (cfg->lcd_modes == NULL) {
2647                 mode = &default_720p;
2648                 num_modes = 1;
2649         } else {
2650                 mode = cfg->lcd_modes;
2651                 num_modes = cfg->num_modes;
2652         }
2653
2654         /* Use the first mode as default. The default Y virtual resolution is
2655          * twice the panel size to allow for double-buffering.
2656          */
2657         ch->format = format;
2658         ch->xres = mode->xres;
2659         ch->xres_virtual = mode->xres;
2660         ch->yres = mode->yres;
2661         ch->yres_virtual = mode->yres * 2;
2662
2663         if (!format->yuv) {
2664                 ch->colorspace = V4L2_COLORSPACE_SRGB;
2665                 ch->pitch = ch->xres_virtual * format->bpp / 8;
2666         } else {
2667                 ch->colorspace = V4L2_COLORSPACE_REC709;
2668                 ch->pitch = ch->xres_virtual;
2669         }
2670
2671         ch->display.width = cfg->panel_cfg.width;
2672         ch->display.height = cfg->panel_cfg.height;
2673         ch->display.mode = *mode;
2674
2675         /* Allocate frame buffer memory. */
2676         ch->fb_size = max_size * format->bpp / 8 * 2;
2677         ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2678                                         GFP_KERNEL);
2679         if (ch->fb_mem == NULL) {
2680                 dev_err(dev, "unable to allocate buffer\n");
2681                 return -ENOMEM;
2682         }
2683
2684         /* Initialize the transmitter device if present. */
2685         if (cfg->tx_dev) {
2686                 if (!cfg->tx_dev->dev.driver ||
2687                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2688                         dev_warn(dev, "unable to get transmitter device\n");
2689                         return -EINVAL;
2690                 }
2691                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2692                 ch->tx_dev->lcdc = ch;
2693                 ch->tx_dev->def_mode = *mode;
2694         }
2695
2696         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2697 }
2698
2699 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2700 {
2701         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2702         struct sh_mobile_lcdc_priv *priv;
2703         struct resource *res;
2704         int num_channels;
2705         int error;
2706         int irq, i;
2707
2708         if (!pdata) {
2709                 dev_err(&pdev->dev, "no platform data defined\n");
2710                 return -EINVAL;
2711         }
2712
2713         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2714         irq = platform_get_irq(pdev, 0);
2715         if (!res || irq < 0) {
2716                 dev_err(&pdev->dev, "cannot get platform resources\n");
2717                 return -ENOENT;
2718         }
2719
2720         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2721         if (!priv) {
2722                 dev_err(&pdev->dev, "cannot allocate device data\n");
2723                 return -ENOMEM;
2724         }
2725
2726         priv->dev = &pdev->dev;
2727         priv->meram_dev = pdata->meram_dev;
2728         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2729                 mutex_init(&priv->ch[i].open_lock);
2730         platform_set_drvdata(pdev, priv);
2731
2732         error = request_irq(irq, sh_mobile_lcdc_irq, 0,
2733                             dev_name(&pdev->dev), priv);
2734         if (error) {
2735                 dev_err(&pdev->dev, "unable to request irq\n");
2736                 goto err1;
2737         }
2738
2739         priv->irq = irq;
2740         atomic_set(&priv->hw_usecnt, -1);
2741
2742         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2743                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2744
2745                 ch->lcdc = priv;
2746                 ch->cfg = &pdata->ch[i];
2747
2748                 error = sh_mobile_lcdc_check_interface(ch);
2749                 if (error) {
2750                         dev_err(&pdev->dev, "unsupported interface type\n");
2751                         goto err1;
2752                 }
2753                 init_waitqueue_head(&ch->frame_end_wait);
2754                 init_completion(&ch->vsync_completion);
2755
2756                 /* probe the backlight is there is one defined */
2757                 if (ch->cfg->bl_info.max_brightness)
2758                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2759
2760                 switch (pdata->ch[i].chan) {
2761                 case LCDC_CHAN_MAINLCD:
2762                         ch->enabled = LDCNT2R_ME;
2763                         ch->reg_offs = lcdc_offs_mainlcd;
2764                         num_channels++;
2765                         break;
2766                 case LCDC_CHAN_SUBLCD:
2767                         ch->enabled = LDCNT2R_SE;
2768                         ch->reg_offs = lcdc_offs_sublcd;
2769                         num_channels++;
2770                         break;
2771                 }
2772         }
2773
2774         if (!num_channels) {
2775                 dev_err(&pdev->dev, "no channels defined\n");
2776                 error = -EINVAL;
2777                 goto err1;
2778         }
2779
2780         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2781         if (num_channels == 2)
2782                 priv->forced_fourcc = pdata->ch[0].fourcc;
2783
2784         priv->base = ioremap_nocache(res->start, resource_size(res));
2785         if (!priv->base) {
2786                 error = -ENOMEM;
2787                 goto err1;
2788         }
2789
2790         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2791         if (error) {
2792                 dev_err(&pdev->dev, "unable to setup clocks\n");
2793                 goto err1;
2794         }
2795
2796         /* Enable runtime PM. */
2797         pm_runtime_enable(&pdev->dev);
2798
2799         for (i = 0; i < num_channels; i++) {
2800                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2801
2802                 error = sh_mobile_lcdc_channel_init(ch);
2803                 if (error)
2804                         goto err1;
2805         }
2806
2807         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2808                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2809
2810                 ovl->cfg = &pdata->overlays[i];
2811                 ovl->channel = &priv->ch[0];
2812
2813                 error = sh_mobile_lcdc_overlay_init(ovl);
2814                 if (error)
2815                         goto err1;
2816         }
2817
2818         error = sh_mobile_lcdc_start(priv);
2819         if (error) {
2820                 dev_err(&pdev->dev, "unable to start hardware\n");
2821                 goto err1;
2822         }
2823
2824         for (i = 0; i < num_channels; i++) {
2825                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2826
2827                 error = sh_mobile_lcdc_channel_fb_register(ch);
2828                 if (error)
2829                         goto err1;
2830         }
2831
2832         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2833                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2834
2835                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2836                 if (error)
2837                         goto err1;
2838         }
2839
2840         /* Failure ignored */
2841         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2842         fb_register_client(&priv->notifier);
2843
2844         return 0;
2845 err1:
2846         sh_mobile_lcdc_remove(pdev);
2847
2848         return error;
2849 }
2850
2851 static struct platform_driver sh_mobile_lcdc_driver = {
2852         .driver         = {
2853                 .name           = "sh_mobile_lcdc_fb",
2854                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2855         },
2856         .probe          = sh_mobile_lcdc_probe,
2857         .remove         = sh_mobile_lcdc_remove,
2858 };
2859
2860 module_platform_driver(sh_mobile_lcdc_driver);
2861
2862 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2863 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2864 MODULE_LICENSE("GPL v2");