drivers/video/sh_mobile_lcdcfb.c

   1 /*
   2  * SuperH Mobile LCDC Framebuffer
   3  *
   4  * Copyright (c) 2008 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/atomic.h>
  12 #include <linux/backlight.h>
  13 #include <linux/clk.h>
  14 #include <linux/console.h>
  15 #include <linux/ctype.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/delay.h>
  18 #include <linux/gpio.h>
  19 #include <linux/init.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mm.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/slab.h>
  28 #include <linux/videodev2.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <video/sh_mobile_lcdc.h>
  32 #include <video/sh_mobile_meram.h>
  33
  34 #include "sh_mobile_lcdcfb.h"
  35
  36 /* ----------------------------------------------------------------------------
  37  * Overlay register definitions
  38  */
  39
  40 #define LDBCR                   0xb00
  41 #define LDBCR_UPC(n)            (1 << ((n) + 16))
  42 #define LDBCR_UPF(n)            (1 << ((n) + 8))
  43 #define LDBCR_UPD(n)            (1 << ((n) + 0))
  44 #define LDBnBSIFR(n)            (0xb20 + (n) * 0x20 + 0x00)
  45 #define LDBBSIFR_EN             (1 << 31)
  46 #define LDBBSIFR_VS             (1 << 29)
  47 #define LDBBSIFR_BRSEL          (1 << 28)
  48 #define LDBBSIFR_MX             (1 << 27)
  49 #define LDBBSIFR_MY             (1 << 26)
  50 #define LDBBSIFR_CV3            (3 << 24)
  51 #define LDBBSIFR_CV2            (2 << 24)
  52 #define LDBBSIFR_CV1            (1 << 24)
  53 #define LDBBSIFR_CV0            (0 << 24)
  54 #define LDBBSIFR_CV_MASK        (3 << 24)
  55 #define LDBBSIFR_LAY_MASK       (0xff << 16)
  56 #define LDBBSIFR_LAY_SHIFT      16
  57 #define LDBBSIFR_ROP3_MASK      (0xff << 16)
  58 #define LDBBSIFR_ROP3_SHIFT     16
  59 #define LDBBSIFR_AL_PL8         (3 << 14)
  60 #define LDBBSIFR_AL_PL1         (2 << 14)
  61 #define LDBBSIFR_AL_PK          (1 << 14)
  62 #define LDBBSIFR_AL_1           (0 << 14)
  63 #define LDBBSIFR_AL_MASK        (3 << 14)
  64 #define LDBBSIFR_SWPL           (1 << 10)
  65 #define LDBBSIFR_SWPW           (1 << 9)
  66 #define LDBBSIFR_SWPB           (1 << 8)
  67 #define LDBBSIFR_RY             (1 << 7)
  68 #define LDBBSIFR_CHRR_420       (2 << 0)
  69 #define LDBBSIFR_CHRR_422       (1 << 0)
  70 #define LDBBSIFR_CHRR_444       (0 << 0)
  71 #define LDBBSIFR_RPKF_ARGB32    (0x00 << 0)
  72 #define LDBBSIFR_RPKF_RGB16     (0x03 << 0)
  73 #define LDBBSIFR_RPKF_RGB24     (0x0b << 0)
  74 #define LDBBSIFR_RPKF_MASK      (0x1f << 0)
  75 #define LDBnBSSZR(n)            (0xb20 + (n) * 0x20 + 0x04)
  76 #define LDBBSSZR_BVSS_MASK      (0xfff << 16)
  77 #define LDBBSSZR_BVSS_SHIFT     16
  78 #define LDBBSSZR_BHSS_MASK      (0xfff << 0)
  79 #define LDBBSSZR_BHSS_SHIFT     0
  80 #define LDBnBLOCR(n)            (0xb20 + (n) * 0x20 + 0x08)
  81 #define LDBBLOCR_CVLC_MASK      (0xfff << 16)
  82 #define LDBBLOCR_CVLC_SHIFT     16
  83 #define LDBBLOCR_CHLC_MASK      (0xfff << 0)
  84 #define LDBBLOCR_CHLC_SHIFT     0
  85 #define LDBnBSMWR(n)            (0xb20 + (n) * 0x20 + 0x0c)
  86 #define LDBBSMWR_BSMWA_MASK     (0xffff << 16)
  87 #define LDBBSMWR_BSMWA_SHIFT    16
  88 #define LDBBSMWR_BSMW_MASK      (0xffff << 0)
  89 #define LDBBSMWR_BSMW_SHIFT     0
  90 #define LDBnBSAYR(n)            (0xb20 + (n) * 0x20 + 0x10)
  91 #define LDBBSAYR_FG1A_MASK      (0xff << 24)
  92 #define LDBBSAYR_FG1A_SHIFT     24
  93 #define LDBBSAYR_FG1R_MASK      (0xff << 16)
  94 #define LDBBSAYR_FG1R_SHIFT     16
  95 #define LDBBSAYR_FG1G_MASK      (0xff << 8)
  96 #define LDBBSAYR_FG1G_SHIFT     8
  97 #define LDBBSAYR_FG1B_MASK      (0xff << 0)
  98 #define LDBBSAYR_FG1B_SHIFT     0
  99 #define LDBnBSACR(n)            (0xb20 + (n) * 0x20 + 0x14)
 100 #define LDBBSACR_FG2A_MASK      (0xff << 24)
 101 #define LDBBSACR_FG2A_SHIFT     24
 102 #define LDBBSACR_FG2R_MASK      (0xff << 16)
 103 #define LDBBSACR_FG2R_SHIFT     16
 104 #define LDBBSACR_FG2G_MASK      (0xff << 8)
 105 #define LDBBSACR_FG2G_SHIFT     8
 106 #define LDBBSACR_FG2B_MASK      (0xff << 0)
 107 #define LDBBSACR_FG2B_SHIFT     0
 108 #define LDBnBSAAR(n)            (0xb20 + (n) * 0x20 + 0x18)
 109 #define LDBBSAAR_AP_MASK        (0xff << 24)
 110 #define LDBBSAAR_AP_SHIFT       24
 111 #define LDBBSAAR_R_MASK         (0xff << 16)
 112 #define LDBBSAAR_R_SHIFT        16
 113 #define LDBBSAAR_GY_MASK        (0xff << 8)
 114 #define LDBBSAAR_GY_SHIFT       8
 115 #define LDBBSAAR_B_MASK         (0xff << 0)
 116 #define LDBBSAAR_B_SHIFT        0
 117 #define LDBnBPPCR(n)            (0xb20 + (n) * 0x20 + 0x1c)
 118 #define LDBBPPCR_AP_MASK        (0xff << 24)
 119 #define LDBBPPCR_AP_SHIFT       24
 120 #define LDBBPPCR_R_MASK         (0xff << 16)
 121 #define LDBBPPCR_R_SHIFT        16
 122 #define LDBBPPCR_GY_MASK        (0xff << 8)
 123 #define LDBBPPCR_GY_SHIFT       8
 124 #define LDBBPPCR_B_MASK         (0xff << 0)
 125 #define LDBBPPCR_B_SHIFT        0
 126 #define LDBnBBGCL(n)            (0xb10 + (n) * 0x04)
 127 #define LDBBBGCL_BGA_MASK       (0xff << 24)
 128 #define LDBBBGCL_BGA_SHIFT      24
 129 #define LDBBBGCL_BGR_MASK       (0xff << 16)
 130 #define LDBBBGCL_BGR_SHIFT      16
 131 #define LDBBBGCL_BGG_MASK       (0xff << 8)
 132 #define LDBBBGCL_BGG_SHIFT      8
 133 #define LDBBBGCL_BGB_MASK       (0xff << 0)
 134 #define LDBBBGCL_BGB_SHIFT      0
 135
 136 #define SIDE_B_OFFSET 0x1000
 137 #define MIRROR_OFFSET 0x2000
 138
 139 #define MAX_XRES 1920
 140 #define MAX_YRES 1080
 141
 142 enum sh_mobile_lcdc_overlay_mode {
 143         LCDC_OVERLAY_BLEND,
 144         LCDC_OVERLAY_ROP3,
 145 };
 146
 147 /*
 148  * struct sh_mobile_lcdc_overlay - LCDC display overlay
 149  *
 150  * @channel: LCDC channel this overlay belongs to
 151  * @cfg: Overlay configuration
 152  * @info: Frame buffer device
 153  * @index: Overlay index (0-3)
 154  * @base: Overlay registers base address
 155  * @enabled: True if the overlay is enabled
 156  * @mode: Overlay blending mode (alpha blend or ROP3)
 157  * @alpha: Global alpha blending value (0-255, for alpha blending mode)
 158  * @rop3: Raster operation (for ROP3 mode)
 159  * @fb_mem: Frame buffer virtual memory address
 160  * @fb_size: Frame buffer size in bytes
 161  * @dma_handle: Frame buffer DMA address
 162  * @base_addr_y: Overlay base address (RGB or luma component)
 163  * @base_addr_c: Overlay base address (chroma component)
 164  * @pan_y_offset: Panning linear offset in bytes (luma component)
 165  * @format: Current pixelf format
 166  * @xres: Horizontal visible resolution
 167  * @xres_virtual: Horizontal total resolution
 168  * @yres: Vertical visible resolution
 169  * @yres_virtual: Vertical total resolution
 170  * @pitch: Overlay line pitch
 171  * @pos_x: Horizontal overlay position
 172  * @pos_y: Vertical overlay position
 173  */
 174 struct sh_mobile_lcdc_overlay {
 175         struct sh_mobile_lcdc_chan *channel;
 176
 177         const struct sh_mobile_lcdc_overlay_cfg *cfg;
 178         struct fb_info *info;
 179
 180         unsigned int index;
 181         unsigned long base;
 182
 183         bool enabled;
 184         enum sh_mobile_lcdc_overlay_mode mode;
 185         unsigned int alpha;
 186         unsigned int rop3;
 187
 188         void *fb_mem;
 189         unsigned long fb_size;
 190
 191         dma_addr_t dma_handle;
 192         unsigned long base_addr_y;
 193         unsigned long base_addr_c;
 194         unsigned long pan_y_offset;
 195
 196         const struct sh_mobile_lcdc_format_info *format;
 197         unsigned int xres;
 198         unsigned int xres_virtual;
 199         unsigned int yres;
 200         unsigned int yres_virtual;
 201         unsigned int pitch;
 202         int pos_x;
 203         int pos_y;
 204 };
 205
 206 struct sh_mobile_lcdc_priv {
 207         void __iomem *base;
 208         int irq;
 209         atomic_t hw_usecnt;
 210         struct device *dev;
 211         struct clk *dot_clk;
 212         unsigned long lddckr;
 213
 214         struct sh_mobile_lcdc_chan ch[2];
 215         struct sh_mobile_lcdc_overlay overlays[4];
 216
 217         struct notifier_block notifier;
 218         int started;
 219         int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 220         struct sh_mobile_meram_info *meram_dev;
 221 };
 222
 223 /* -----------------------------------------------------------------------------
 224  * Registers access
 225  */
 226
 227 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
 228         [LDDCKPAT1R] = 0x400,
 229         [LDDCKPAT2R] = 0x404,
 230         [LDMT1R] = 0x418,
 231         [LDMT2R] = 0x41c,
 232         [LDMT3R] = 0x420,
 233         [LDDFR] = 0x424,
 234         [LDSM1R] = 0x428,
 235         [LDSM2R] = 0x42c,
 236         [LDSA1R] = 0x430,
 237         [LDSA2R] = 0x434,
 238         [LDMLSR] = 0x438,
 239         [LDHCNR] = 0x448,
 240         [LDHSYNR] = 0x44c,
 241         [LDVLNR] = 0x450,
 242         [LDVSYNR] = 0x454,
 243         [LDPMR] = 0x460,
 244         [LDHAJR] = 0x4a0,
 245 };
 246
 247 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 248         [LDDCKPAT1R] = 0x408,
 249         [LDDCKPAT2R] = 0x40c,
 250         [LDMT1R] = 0x600,
 251         [LDMT2R] = 0x604,
 252         [LDMT3R] = 0x608,
 253         [LDDFR] = 0x60c,
 254         [LDSM1R] = 0x610,
 255         [LDSM2R] = 0x614,
 256         [LDSA1R] = 0x618,
 257         [LDMLSR] = 0x620,
 258         [LDHCNR] = 0x624,
 259         [LDHSYNR] = 0x628,
 260         [LDVLNR] = 0x62c,
 261         [LDVSYNR] = 0x630,
 262         [LDPMR] = 0x63c,
 263 };
 264
 265 static bool banked(int reg_nr)
 266 {
 267         switch (reg_nr) {
 268         case LDMT1R:
 269         case LDMT2R:
 270         case LDMT3R:
 271         case LDDFR:
 272         case LDSM1R:
 273         case LDSA1R:
 274         case LDSA2R:
 275         case LDMLSR:
 276         case LDHCNR:
 277         case LDHSYNR:
 278         case LDVLNR:
 279         case LDVSYNR:
 280                 return true;
 281         }
 282         return false;
 283 }
 284
 285 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 286 {
 287         return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 288 }
 289
 290 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 291                             int reg_nr, unsigned long data)
 292 {
 293         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 294         if (banked(reg_nr))
 295                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 296                           SIDE_B_OFFSET);
 297 }
 298
 299 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 300                             int reg_nr, unsigned long data)
 301 {
 302         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 303                   MIRROR_OFFSET);
 304 }
 305
 306 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 307                                     int reg_nr)
 308 {
 309         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 310 }
 311
 312 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
 313                                int reg, unsigned long data)
 314 {
 315         iowrite32(data, ovl->channel->lcdc->base + reg);
 316         iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
 317 }
 318
 319 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 320                        unsigned long reg_offs, unsigned long data)
 321 {
 322         iowrite32(data, priv->base + reg_offs);
 323 }
 324
 325 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 326                                unsigned long reg_offs)
 327 {
 328         return ioread32(priv->base + reg_offs);
 329 }
 330
 331 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 332                           unsigned long reg_offs,
 333                           unsigned long mask, unsigned long until)
 334 {
 335         while ((lcdc_read(priv, reg_offs) & mask) != until)
 336                 cpu_relax();
 337 }
 338
 339 /* -----------------------------------------------------------------------------
 340  * Clock management
 341  */
 342
 343 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 344 {
 345         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 346                 if (priv->dot_clk)
 347                         clk_enable(priv->dot_clk);
 348                 pm_runtime_get_sync(priv->dev);
 349                 if (priv->meram_dev && priv->meram_dev->pdev)
 350                         pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
 351         }
 352 }
 353
 354 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 355 {
 356         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 357                 if (priv->meram_dev && priv->meram_dev->pdev)
 358                         pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
 359                 pm_runtime_put(priv->dev);
 360                 if (priv->dot_clk)
 361                         clk_disable(priv->dot_clk);
 362         }
 363 }
 364
 365 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 366                                        int clock_source)
 367 {
 368         struct clk *clk;
 369         char *str;
 370
 371         switch (clock_source) {
 372         case LCDC_CLK_BUS:
 373                 str = "bus_clk";
 374                 priv->lddckr = LDDCKR_ICKSEL_BUS;
 375                 break;
 376         case LCDC_CLK_PERIPHERAL:
 377                 str = "peripheral_clk";
 378                 priv->lddckr = LDDCKR_ICKSEL_MIPI;
 379                 break;
 380         case LCDC_CLK_EXTERNAL:
 381                 str = NULL;
 382                 priv->lddckr = LDDCKR_ICKSEL_HDMI;
 383                 break;
 384         default:
 385                 return -EINVAL;
 386         }
 387
 388         if (str == NULL)
 389                 return 0;
 390
 391         clk = clk_get(priv->dev, str);
 392         if (IS_ERR(clk)) {
 393                 dev_err(priv->dev, "cannot get dot clock %s\n", str);
 394                 return PTR_ERR(clk);
 395         }
 396
 397         priv->dot_clk = clk;
 398         return 0;
 399 }
 400
 401 /* -----------------------------------------------------------------------------
 402  * Display, panel and deferred I/O
 403  */
 404
 405 static void lcdc_sys_write_index(void *handle, unsigned long data)
 406 {
 407         struct sh_mobile_lcdc_chan *ch = handle;
 408
 409         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 410         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 411         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 412                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 413         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 414 }
 415
 416 static void lcdc_sys_write_data(void *handle, unsigned long data)
 417 {
 418         struct sh_mobile_lcdc_chan *ch = handle;
 419
 420         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 421         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 422         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 423                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 424         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 425 }
 426
 427 static unsigned long lcdc_sys_read_data(void *handle)
 428 {
 429         struct sh_mobile_lcdc_chan *ch = handle;
 430
 431         lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 432         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 433         lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 434                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 435         udelay(1);
 436         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 437
 438         return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 439 }
 440
 441 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 442         lcdc_sys_write_index,
 443         lcdc_sys_write_data,
 444         lcdc_sys_read_data,
 445 };
 446
 447 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 448                                   struct list_head *pagelist)
 449 {
 450         struct sh_mobile_lcdc_chan *ch = info->par;
 451         unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 452         struct page *page;
 453         int nr_pages = 0;
 454
 455         sg_init_table(ch->sglist, nr_pages_max);
 456
 457         list_for_each_entry(page, pagelist, lru)
 458                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 459
 460         return nr_pages;
 461 }
 462
 463 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 464                                        struct list_head *pagelist)
 465 {
 466         struct sh_mobile_lcdc_chan *ch = info->par;
 467         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 468
 469         /* enable clocks before accessing hardware */
 470         sh_mobile_lcdc_clk_on(ch->lcdc);
 471
 472         /*
 473          * It's possible to get here without anything on the pagelist via
 474          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 475          * invocation. In the former case, the acceleration routines are
 476          * stepped in to when using the framebuffer console causing the
 477          * workqueue to be scheduled without any dirty pages on the list.
 478          *
 479          * Despite this, a panel update is still needed given that the
 480          * acceleration routines have their own methods for writing in
 481          * that still need to be updated.
 482          *
 483          * The fsync() and empty pagelist case could be optimized for,
 484          * but we don't bother, as any application exhibiting such
 485          * behaviour is fundamentally broken anyways.
 486          */
 487         if (!list_empty(pagelist)) {
 488                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 489
 490                 /* trigger panel update */
 491                 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 492                 if (panel->start_transfer)
 493                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 494                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 495                 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 496                              DMA_TO_DEVICE);
 497         } else {
 498                 if (panel->start_transfer)
 499                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 500                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 501         }
 502 }
 503
 504 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 505 {
 506         struct fb_deferred_io *fbdefio = info->fbdefio;
 507
 508         if (fbdefio)
 509                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 510 }
 511
 512 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 513 {
 514         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 515
 516         if (ch->tx_dev) {
 517                 int ret;
 518
 519                 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 520                 if (ret < 0)
 521                         return;
 522
 523                 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 524                         ch->info->state = FBINFO_STATE_SUSPENDED;
 525         }
 526
 527         /* HDMI must be enabled before LCDC configuration */
 528         if (panel->display_on)
 529                 panel->display_on();
 530 }
 531
 532 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 533 {
 534         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 535
 536         if (panel->display_off)
 537                 panel->display_off();
 538
 539         if (ch->tx_dev)
 540                 ch->tx_dev->ops->display_off(ch->tx_dev);
 541 }
 542
 543 static bool
 544 sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
 545                                 const struct fb_videomode *new_mode)
 546 {
 547         dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
 548                 ch->display.mode.xres, ch->display.mode.yres,
 549                 new_mode->xres, new_mode->yres);
 550
 551         /* It can be a different monitor with an equal video-mode */
 552         if (fb_mode_is_equal(&ch->display.mode, new_mode))
 553                 return false;
 554
 555         dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
 556                 ch->display.mode.yres, new_mode->yres);
 557         ch->display.mode = *new_mode;
 558
 559         return true;
 560 }
 561
 562 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 563                                     struct fb_info *info);
 564
 565 static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
 566                                          enum sh_mobile_lcdc_entity_event event,
 567                                          const struct fb_videomode *mode,
 568                                          const struct fb_monspecs *monspec)
 569 {
 570         struct fb_info *info = ch->info;
 571         struct fb_var_screeninfo var;
 572         int ret = 0;
 573
 574         switch (event) {
 575         case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
 576                 /* HDMI plug in */
 577                 if (lock_fb_info(info)) {
 578                         console_lock();
 579
 580                         ch->display.width = monspec->max_x * 10;
 581                         ch->display.height = monspec->max_y * 10;
 582
 583                         if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
 584                             info->state == FBINFO_STATE_RUNNING) {
 585                                 /* First activation with the default monitor.
 586                                  * Just turn on, if we run a resume here, the
 587                                  * logo disappears.
 588                                  */
 589                                 info->var.width = ch->display.width;
 590                                 info->var.height = ch->display.height;
 591                                 sh_mobile_lcdc_display_on(ch);
 592                         } else {
 593                                 /* New monitor or have to wake up */
 594                                 fb_set_suspend(info, 0);
 595                         }
 596
 597                         console_unlock();
 598                         unlock_fb_info(info);
 599                 }
 600                 break;
 601
 602         case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
 603                 /* HDMI disconnect */
 604                 if (lock_fb_info(info)) {
 605                         console_lock();
 606                         fb_set_suspend(info, 1);
 607                         console_unlock();
 608                         unlock_fb_info(info);
 609                 }
 610                 break;
 611
 612         case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
 613                 /* Validate a proposed new mode */
 614                 fb_videomode_to_var(&var, mode);
 615                 var.bits_per_pixel = info->var.bits_per_pixel;
 616                 var.grayscale = info->var.grayscale;
 617                 ret = sh_mobile_lcdc_check_var(&var, info);
 618                 break;
 619         }
 620
 621         return ret;
 622 }
 623
 624 /* -----------------------------------------------------------------------------
 625  * Format helpers
 626  */
 627
 628 struct sh_mobile_lcdc_format_info {
 629         u32 fourcc;
 630         unsigned int bpp;
 631         bool yuv;
 632         u32 lddfr;
 633 };
 634
 635 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 636         {
 637                 .fourcc = V4L2_PIX_FMT_RGB565,
 638                 .bpp = 16,
 639                 .yuv = false,
 640                 .lddfr = LDDFR_PKF_RGB16,
 641         }, {
 642                 .fourcc = V4L2_PIX_FMT_BGR24,
 643                 .bpp = 24,
 644                 .yuv = false,
 645                 .lddfr = LDDFR_PKF_RGB24,
 646         }, {
 647                 .fourcc = V4L2_PIX_FMT_BGR32,
 648                 .bpp = 32,
 649                 .yuv = false,
 650                 .lddfr = LDDFR_PKF_ARGB32,
 651         }, {
 652                 .fourcc = V4L2_PIX_FMT_NV12,
 653                 .bpp = 12,
 654                 .yuv = true,
 655                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 656         }, {
 657                 .fourcc = V4L2_PIX_FMT_NV21,
 658                 .bpp = 12,
 659                 .yuv = true,
 660                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 661         }, {
 662                 .fourcc = V4L2_PIX_FMT_NV16,
 663                 .bpp = 16,
 664                 .yuv = true,
 665                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 666         }, {
 667                 .fourcc = V4L2_PIX_FMT_NV61,
 668                 .bpp = 16,
 669                 .yuv = true,
 670                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 671         }, {
 672                 .fourcc = V4L2_PIX_FMT_NV24,
 673                 .bpp = 24,
 674                 .yuv = true,
 675                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 676         }, {
 677                 .fourcc = V4L2_PIX_FMT_NV42,
 678                 .bpp = 24,
 679                 .yuv = true,
 680                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 681         },
 682 };
 683
 684 static const struct sh_mobile_lcdc_format_info *
 685 sh_mobile_format_info(u32 fourcc)
 686 {
 687         unsigned int i;
 688
 689         for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 690                 if (sh_mobile_format_infos[i].fourcc == fourcc)
 691                         return &sh_mobile_format_infos[i];
 692         }
 693
 694         return NULL;
 695 }
 696
 697 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 698 {
 699         if (var->grayscale > 1)
 700                 return var->grayscale;
 701
 702         switch (var->bits_per_pixel) {
 703         case 16:
 704                 return V4L2_PIX_FMT_RGB565;
 705         case 24:
 706                 return V4L2_PIX_FMT_BGR24;
 707         case 32:
 708                 return V4L2_PIX_FMT_BGR32;
 709         default:
 710                 return 0;
 711         }
 712 }
 713
 714 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 715 {
 716         return var->grayscale > 1;
 717 }
 718
 719 /* -----------------------------------------------------------------------------
 720  * Start, stop and IRQ
 721  */
 722
 723 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 724 {
 725         struct sh_mobile_lcdc_priv *priv = data;
 726         struct sh_mobile_lcdc_chan *ch;
 727         unsigned long ldintr;
 728         int is_sub;
 729         int k;
 730
 731         /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 732         ldintr = lcdc_read(priv, _LDINTR);
 733         lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 734
 735         /* figure out if this interrupt is for main or sub lcd */
 736         is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 737
 738         /* wake up channel and disable clocks */
 739         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 740                 ch = &priv->ch[k];
 741
 742                 if (!ch->enabled)
 743                         continue;
 744
 745                 /* Frame End */
 746                 if (ldintr & LDINTR_FS) {
 747                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 748                                 ch->frame_end = 1;
 749                                 wake_up(&ch->frame_end_wait);
 750
 751                                 sh_mobile_lcdc_clk_off(priv);
 752                         }
 753                 }
 754
 755                 /* VSYNC End */
 756                 if (ldintr & LDINTR_VES)
 757                         complete(&ch->vsync_completion);
 758         }
 759
 760         return IRQ_HANDLED;
 761 }
 762
 763 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 764 {
 765         unsigned long ldintr;
 766         int ret;
 767
 768         /* Enable VSync End interrupt and be careful not to acknowledge any
 769          * pending interrupt.
 770          */
 771         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 772         ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 773         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 774
 775         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 776                                                         msecs_to_jiffies(100));
 777         if (!ret)
 778                 return -ETIMEDOUT;
 779
 780         return 0;
 781 }
 782
 783 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 784                                       int start)
 785 {
 786         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 787         int k;
 788
 789         /* start or stop the lcdc */
 790         if (start)
 791                 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 792         else
 793                 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 794
 795         /* wait until power is applied/stopped on all channels */
 796         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 797                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 798                         while (1) {
 799                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 800                                     & LDPMR_LPS;
 801                                 if (start && tmp == LDPMR_LPS)
 802                                         break;
 803                                 if (!start && tmp == 0)
 804                                         break;
 805                                 cpu_relax();
 806                         }
 807
 808         if (!start)
 809                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 810 }
 811
 812 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 813 {
 814         const struct fb_var_screeninfo *var = &ch->info->var;
 815         const struct fb_videomode *mode = &ch->display.mode;
 816         unsigned long h_total, hsync_pos, display_h_total;
 817         u32 tmp;
 818
 819         tmp = ch->ldmt1r_value;
 820         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 821         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 822         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 823         tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 824         tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 825         tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 826         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 827         lcdc_write_chan(ch, LDMT1R, tmp);
 828
 829         /* setup SYS bus */
 830         lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 831         lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 832
 833         /* horizontal configuration */
 834         h_total = mode->xres + mode->hsync_len + mode->left_margin
 835                 + mode->right_margin;
 836         tmp = h_total / 8; /* HTCN */
 837         tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 838         lcdc_write_chan(ch, LDHCNR, tmp);
 839
 840         hsync_pos = mode->xres + mode->right_margin;
 841         tmp = hsync_pos / 8; /* HSYNP */
 842         tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 843         lcdc_write_chan(ch, LDHSYNR, tmp);
 844
 845         /* vertical configuration */
 846         tmp = mode->yres + mode->vsync_len + mode->upper_margin
 847             + mode->lower_margin; /* VTLN */
 848         tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 849         lcdc_write_chan(ch, LDVLNR, tmp);
 850
 851         tmp = mode->yres + mode->lower_margin; /* VSYNP */
 852         tmp |= mode->vsync_len << 16; /* VSYNW */
 853         lcdc_write_chan(ch, LDVSYNR, tmp);
 854
 855         /* Adjust horizontal synchronisation for HDMI */
 856         display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 857                         + mode->right_margin;
 858         tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 859             | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 860         lcdc_write_chan(ch, LDHAJR, tmp);
 861         lcdc_write_chan_mirror(ch, LDHAJR, tmp);
 862 }
 863
 864 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 865 {
 866         u32 format = 0;
 867
 868         if (!ovl->enabled) {
 869                 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 870                 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 871                 lcdc_write(ovl->channel->lcdc, LDBCR,
 872                            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 873                 return;
 874         }
 875
 876         ovl->base_addr_y = ovl->dma_handle;
 877         ovl->base_addr_c = ovl->dma_handle
 878                          + ovl->xres_virtual * ovl->yres_virtual;
 879
 880         switch (ovl->mode) {
 881         case LCDC_OVERLAY_BLEND:
 882                 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 883                 break;
 884
 885         case LCDC_OVERLAY_ROP3:
 886                 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 887                        | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 888                 break;
 889         }
 890
 891         switch (ovl->format->fourcc) {
 892         case V4L2_PIX_FMT_RGB565:
 893         case V4L2_PIX_FMT_NV21:
 894         case V4L2_PIX_FMT_NV61:
 895         case V4L2_PIX_FMT_NV42:
 896                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 897                 break;
 898         case V4L2_PIX_FMT_BGR24:
 899         case V4L2_PIX_FMT_NV12:
 900         case V4L2_PIX_FMT_NV16:
 901         case V4L2_PIX_FMT_NV24:
 902                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 903                 break;
 904         case V4L2_PIX_FMT_BGR32:
 905         default:
 906                 format |= LDBBSIFR_SWPL;
 907                 break;
 908         }
 909
 910         switch (ovl->format->fourcc) {
 911         case V4L2_PIX_FMT_RGB565:
 912                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 913                 break;
 914         case V4L2_PIX_FMT_BGR24:
 915                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 916                 break;
 917         case V4L2_PIX_FMT_BGR32:
 918                 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 919                 break;
 920         case V4L2_PIX_FMT_NV12:
 921         case V4L2_PIX_FMT_NV21:
 922                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 923                 break;
 924         case V4L2_PIX_FMT_NV16:
 925         case V4L2_PIX_FMT_NV61:
 926                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 927                 break;
 928         case V4L2_PIX_FMT_NV24:
 929         case V4L2_PIX_FMT_NV42:
 930                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 931                 break;
 932         }
 933
 934         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 935
 936         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 937
 938         lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 939                 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 940                 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 941         lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 942                 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 943                 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 944         lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 945                 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 946
 947         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 948         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 949
 950         lcdc_write(ovl->channel->lcdc, LDBCR,
 951                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 952 }
 953
 954 /*
 955  * __sh_mobile_lcdc_start - Configure and start the LCDC
 956  * @priv: LCDC device
 957  *
 958  * Configure all enabled channels and start the LCDC device. All external
 959  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 960  */
 961 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 962 {
 963         struct sh_mobile_lcdc_chan *ch;
 964         unsigned long tmp;
 965         int k, m;
 966
 967         /* Enable LCDC channels. Read data from external memory, avoid using the
 968          * BEU for now.
 969          */
 970         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 971
 972         /* Stop the LCDC first and disable all interrupts. */
 973         sh_mobile_lcdc_start_stop(priv, 0);
 974         lcdc_write(priv, _LDINTR, 0);
 975
 976         /* Configure power supply, dot clocks and start them. */
 977         tmp = priv->lddckr;
 978         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 979                 ch = &priv->ch[k];
 980                 if (!ch->enabled)
 981                         continue;
 982
 983                 /* Power supply */
 984                 lcdc_write_chan(ch, LDPMR, 0);
 985
 986                 m = ch->cfg->clock_divider;
 987                 if (!m)
 988                         continue;
 989
 990                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 991                  * denominator.
 992                  */
 993                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 994                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 995
 996                 if (m == 1)
 997                         m = LDDCKR_MOSEL;
 998                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 999         }
1000
1001         lcdc_write(priv, _LDDCKR, tmp);
1002         lcdc_write(priv, _LDDCKSTPR, 0);
1003         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1004
1005         /* Setup geometry, format, frame buffer memory and operation mode. */
1006         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1007                 ch = &priv->ch[k];
1008                 if (!ch->enabled)
1009                         continue;
1010
1011                 sh_mobile_lcdc_geometry(ch);
1012
1013                 tmp = ch->format->lddfr;
1014
1015                 if (ch->format->yuv) {
1016                         switch (ch->colorspace) {
1017                         case V4L2_COLORSPACE_REC709:
1018                                 tmp |= LDDFR_CF1;
1019                                 break;
1020                         case V4L2_COLORSPACE_JPEG:
1021                                 tmp |= LDDFR_CF0;
1022                                 break;
1023                         }
1024                 }
1025
1026                 lcdc_write_chan(ch, LDDFR, tmp);
1027                 lcdc_write_chan(ch, LDMLSR, ch->line_size);
1028                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1029                 if (ch->format->yuv)
1030                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1031
1032                 /* When using deferred I/O mode, configure the LCDC for one-shot
1033                  * operation and enable the frame end interrupt. Otherwise use
1034                  * continuous read mode.
1035                  */
1036                 if (ch->ldmt1r_value & LDMT1R_IFM &&
1037                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
1038                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1039                         lcdc_write(priv, _LDINTR, LDINTR_FE);
1040                 } else {
1041                         lcdc_write_chan(ch, LDSM1R, 0);
1042                 }
1043         }
1044
1045         /* Word and long word swap. */
1046         switch (priv->ch[0].format->fourcc) {
1047         case V4L2_PIX_FMT_RGB565:
1048         case V4L2_PIX_FMT_NV21:
1049         case V4L2_PIX_FMT_NV61:
1050         case V4L2_PIX_FMT_NV42:
1051                 tmp = LDDDSR_LS | LDDDSR_WS;
1052                 break;
1053         case V4L2_PIX_FMT_BGR24:
1054         case V4L2_PIX_FMT_NV12:
1055         case V4L2_PIX_FMT_NV16:
1056         case V4L2_PIX_FMT_NV24:
1057                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1058                 break;
1059         case V4L2_PIX_FMT_BGR32:
1060         default:
1061                 tmp = LDDDSR_LS;
1062                 break;
1063         }
1064         lcdc_write(priv, _LDDDSR, tmp);
1065
1066         /* Enable the display output. */
1067         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1068         sh_mobile_lcdc_start_stop(priv, 1);
1069         priv->started = 1;
1070 }
1071
1072 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1073 {
1074         struct sh_mobile_meram_info *mdev = priv->meram_dev;
1075         struct sh_mobile_lcdc_chan *ch;
1076         unsigned long tmp;
1077         int ret;
1078         int k;
1079
1080         /* enable clocks before accessing the hardware */
1081         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1082                 if (priv->ch[k].enabled)
1083                         sh_mobile_lcdc_clk_on(priv);
1084         }
1085
1086         /* reset */
1087         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1088         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1089
1090         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1091                 const struct sh_mobile_lcdc_panel_cfg *panel;
1092
1093                 ch = &priv->ch[k];
1094                 if (!ch->enabled)
1095                         continue;
1096
1097                 panel = &ch->cfg->panel_cfg;
1098                 if (panel->setup_sys) {
1099                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1100                         if (ret)
1101                                 return ret;
1102                 }
1103         }
1104
1105         /* Compute frame buffer base address and pitch for each channel. */
1106         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1107                 int pixelformat;
1108                 void *cache;
1109
1110                 ch = &priv->ch[k];
1111                 if (!ch->enabled)
1112                         continue;
1113
1114                 ch->base_addr_y = ch->dma_handle;
1115                 ch->base_addr_c = ch->dma_handle
1116                                 + ch->xres_virtual * ch->yres_virtual;
1117                 ch->line_size = ch->pitch;
1118
1119                 /* Enable MERAM if possible. */
1120                 if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1121                         continue;
1122
1123                 /* Free the allocated MERAM cache. */
1124                 if (ch->cache) {
1125                         sh_mobile_meram_cache_free(mdev, ch->cache);
1126                         ch->cache = NULL;
1127                 }
1128
1129                 switch (ch->format->fourcc) {
1130                 case V4L2_PIX_FMT_NV12:
1131                 case V4L2_PIX_FMT_NV21:
1132                 case V4L2_PIX_FMT_NV16:
1133                 case V4L2_PIX_FMT_NV61:
1134                         pixelformat = SH_MOBILE_MERAM_PF_NV;
1135                         break;
1136                 case V4L2_PIX_FMT_NV24:
1137                 case V4L2_PIX_FMT_NV42:
1138                         pixelformat = SH_MOBILE_MERAM_PF_NV24;
1139                         break;
1140                 case V4L2_PIX_FMT_RGB565:
1141                 case V4L2_PIX_FMT_BGR24:
1142                 case V4L2_PIX_FMT_BGR32:
1143                 default:
1144                         pixelformat = SH_MOBILE_MERAM_PF_RGB;
1145                         break;
1146                 }
1147
1148                 cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1149                                         ch->pitch, ch->yres, pixelformat,
1150                                         &ch->line_size);
1151                 if (!IS_ERR(cache)) {
1152                         sh_mobile_meram_cache_update(mdev, cache,
1153                                         ch->base_addr_y, ch->base_addr_c,
1154                                         &ch->base_addr_y, &ch->base_addr_c);
1155                         ch->cache = cache;
1156                 }
1157         }
1158
1159         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1160                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1161                 sh_mobile_lcdc_overlay_setup(ovl);
1162         }
1163
1164         /* Start the LCDC. */
1165         __sh_mobile_lcdc_start(priv);
1166
1167         /* Setup deferred I/O, tell the board code to enable the panels, and
1168          * turn backlight on.
1169          */
1170         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1171                 ch = &priv->ch[k];
1172                 if (!ch->enabled)
1173                         continue;
1174
1175                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1176                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1177                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1178                         ch->defio.delay = msecs_to_jiffies(tmp);
1179                         ch->info->fbdefio = &ch->defio;
1180                         fb_deferred_io_init(ch->info);
1181                 }
1182
1183                 sh_mobile_lcdc_display_on(ch);
1184
1185                 if (ch->bl) {
1186                         ch->bl->props.power = FB_BLANK_UNBLANK;
1187                         backlight_update_status(ch->bl);
1188                 }
1189         }
1190
1191         return 0;
1192 }
1193
1194 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1195 {
1196         struct sh_mobile_lcdc_chan *ch;
1197         int k;
1198
1199         /* clean up deferred io and ask board code to disable panel */
1200         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1201                 ch = &priv->ch[k];
1202                 if (!ch->enabled)
1203                         continue;
1204
1205                 /* deferred io mode:
1206                  * flush frame, and wait for frame end interrupt
1207                  * clean up deferred io and enable clock
1208                  */
1209                 if (ch->info && ch->info->fbdefio) {
1210                         ch->frame_end = 0;
1211                         schedule_delayed_work(&ch->info->deferred_work, 0);
1212                         wait_event(ch->frame_end_wait, ch->frame_end);
1213                         fb_deferred_io_cleanup(ch->info);
1214                         ch->info->fbdefio = NULL;
1215                         sh_mobile_lcdc_clk_on(priv);
1216                 }
1217
1218                 if (ch->bl) {
1219                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1220                         backlight_update_status(ch->bl);
1221                 }
1222
1223                 sh_mobile_lcdc_display_off(ch);
1224
1225                 /* Free the MERAM cache. */
1226                 if (ch->cache) {
1227                         sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1228                         ch->cache = 0;
1229                 }
1230
1231         }
1232
1233         /* stop the lcdc */
1234         if (priv->started) {
1235                 sh_mobile_lcdc_start_stop(priv, 0);
1236                 priv->started = 0;
1237         }
1238
1239         /* stop clocks */
1240         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1241                 if (priv->ch[k].enabled)
1242                         sh_mobile_lcdc_clk_off(priv);
1243 }
1244
1245 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1246                                       struct fb_info *info)
1247 {
1248         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1249                 return -EINVAL;
1250
1251         /* Make sure the virtual resolution is at least as big as the visible
1252          * resolution.
1253          */
1254         if (var->xres_virtual < var->xres)
1255                 var->xres_virtual = var->xres;
1256         if (var->yres_virtual < var->yres)
1257                 var->yres_virtual = var->yres;
1258
1259         if (sh_mobile_format_is_fourcc(var)) {
1260                 const struct sh_mobile_lcdc_format_info *format;
1261
1262                 format = sh_mobile_format_info(var->grayscale);
1263                 if (format == NULL)
1264                         return -EINVAL;
1265                 var->bits_per_pixel = format->bpp;
1266
1267                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1268                  * respectively.
1269                  */
1270                 if (!format->yuv)
1271                         var->colorspace = V4L2_COLORSPACE_SRGB;
1272                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1273                         var->colorspace = V4L2_COLORSPACE_JPEG;
1274         } else {
1275                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1276                         var->bits_per_pixel = 16;
1277                         var->red.offset = 11;
1278                         var->red.length = 5;
1279                         var->green.offset = 5;
1280                         var->green.length = 6;
1281                         var->blue.offset = 0;
1282                         var->blue.length = 5;
1283                         var->transp.offset = 0;
1284                         var->transp.length = 0;
1285                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1286                         var->bits_per_pixel = 24;
1287                         var->red.offset = 16;
1288                         var->red.length = 8;
1289                         var->green.offset = 8;
1290                         var->green.length = 8;
1291                         var->blue.offset = 0;
1292                         var->blue.length = 8;
1293                         var->transp.offset = 0;
1294                         var->transp.length = 0;
1295                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1296                         var->bits_per_pixel = 32;
1297                         var->red.offset = 16;
1298                         var->red.length = 8;
1299                         var->green.offset = 8;
1300                         var->green.length = 8;
1301                         var->blue.offset = 0;
1302                         var->blue.length = 8;
1303                         var->transp.offset = 24;
1304                         var->transp.length = 8;
1305                 } else
1306                         return -EINVAL;
1307
1308                 var->red.msb_right = 0;
1309                 var->green.msb_right = 0;
1310                 var->blue.msb_right = 0;
1311                 var->transp.msb_right = 0;
1312         }
1313
1314         /* Make sure we don't exceed our allocated memory. */
1315         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1316             info->fix.smem_len)
1317                 return -EINVAL;
1318
1319         return 0;
1320 }
1321
1322 /* -----------------------------------------------------------------------------
1323  * Frame buffer operations - Overlays
1324  */
1325
1326 static ssize_t
1327 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1328 {
1329         struct fb_info *info = dev_get_drvdata(dev);
1330         struct sh_mobile_lcdc_overlay *ovl = info->par;
1331
1332         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1333 }
1334
1335 static ssize_t
1336 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1337                     const char *buf, size_t count)
1338 {
1339         struct fb_info *info = dev_get_drvdata(dev);
1340         struct sh_mobile_lcdc_overlay *ovl = info->par;
1341         unsigned int alpha;
1342         char *endp;
1343
1344         alpha = simple_strtoul(buf, &endp, 10);
1345         if (isspace(*endp))
1346                 endp++;
1347
1348         if (endp - buf != count)
1349                 return -EINVAL;
1350
1351         if (alpha > 255)
1352                 return -EINVAL;
1353
1354         if (ovl->alpha != alpha) {
1355                 ovl->alpha = alpha;
1356
1357                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1358                         sh_mobile_lcdc_overlay_setup(ovl);
1359         }
1360
1361         return count;
1362 }
1363
1364 static ssize_t
1365 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1366 {
1367         struct fb_info *info = dev_get_drvdata(dev);
1368         struct sh_mobile_lcdc_overlay *ovl = info->par;
1369
1370         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1371 }
1372
1373 static ssize_t
1374 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1375                    const char *buf, size_t count)
1376 {
1377         struct fb_info *info = dev_get_drvdata(dev);
1378         struct sh_mobile_lcdc_overlay *ovl = info->par;
1379         unsigned int mode;
1380         char *endp;
1381
1382         mode = simple_strtoul(buf, &endp, 10);
1383         if (isspace(*endp))
1384                 endp++;
1385
1386         if (endp - buf != count)
1387                 return -EINVAL;
1388
1389         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1390                 return -EINVAL;
1391
1392         if (ovl->mode != mode) {
1393                 ovl->mode = mode;
1394
1395                 if (ovl->enabled)
1396                         sh_mobile_lcdc_overlay_setup(ovl);
1397         }
1398
1399         return count;
1400 }
1401
1402 static ssize_t
1403 overlay_position_show(struct device *dev, struct device_attribute *attr,
1404                       char *buf)
1405 {
1406         struct fb_info *info = dev_get_drvdata(dev);
1407         struct sh_mobile_lcdc_overlay *ovl = info->par;
1408
1409         return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1410 }
1411
1412 static ssize_t
1413 overlay_position_store(struct device *dev, struct device_attribute *attr,
1414                        const char *buf, size_t count)
1415 {
1416         struct fb_info *info = dev_get_drvdata(dev);
1417         struct sh_mobile_lcdc_overlay *ovl = info->par;
1418         char *endp;
1419         int pos_x;
1420         int pos_y;
1421
1422         pos_x = simple_strtol(buf, &endp, 10);
1423         if (*endp != ',')
1424                 return -EINVAL;
1425
1426         pos_y = simple_strtol(endp + 1, &endp, 10);
1427         if (isspace(*endp))
1428                 endp++;
1429
1430         if (endp - buf != count)
1431                 return -EINVAL;
1432
1433         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1434                 ovl->pos_x = pos_x;
1435                 ovl->pos_y = pos_y;
1436
1437                 if (ovl->enabled)
1438                         sh_mobile_lcdc_overlay_setup(ovl);
1439         }
1440
1441         return count;
1442 }
1443
1444 static ssize_t
1445 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1446 {
1447         struct fb_info *info = dev_get_drvdata(dev);
1448         struct sh_mobile_lcdc_overlay *ovl = info->par;
1449
1450         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1451 }
1452
1453 static ssize_t
1454 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1455                     const char *buf, size_t count)
1456 {
1457         struct fb_info *info = dev_get_drvdata(dev);
1458         struct sh_mobile_lcdc_overlay *ovl = info->par;
1459         unsigned int rop3;
1460         char *endp;
1461
1462         rop3 = !!simple_strtoul(buf, &endp, 10);
1463         if (isspace(*endp))
1464                 endp++;
1465
1466         if (endp - buf != count)
1467                 return -EINVAL;
1468
1469         if (rop3 > 255)
1470                 return -EINVAL;
1471
1472         if (ovl->rop3 != rop3) {
1473                 ovl->rop3 = rop3;
1474
1475                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1476                         sh_mobile_lcdc_overlay_setup(ovl);
1477         }
1478
1479         return count;
1480 }
1481
1482 static const struct device_attribute overlay_sysfs_attrs[] = {
1483         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1484                overlay_alpha_show, overlay_alpha_store),
1485         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1486                overlay_mode_show, overlay_mode_store),
1487         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1488                overlay_position_show, overlay_position_store),
1489         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1490                overlay_rop3_show, overlay_rop3_store),
1491 };
1492
1493 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1494         .id =           "SH Mobile LCDC",
1495         .type =         FB_TYPE_PACKED_PIXELS,
1496         .visual =       FB_VISUAL_TRUECOLOR,
1497         .accel =        FB_ACCEL_NONE,
1498         .xpanstep =     1,
1499         .ypanstep =     1,
1500         .ywrapstep =    0,
1501         .capabilities = FB_CAP_FOURCC,
1502 };
1503
1504 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1505                                     struct fb_info *info)
1506 {
1507         struct sh_mobile_lcdc_overlay *ovl = info->par;
1508         unsigned long base_addr_y;
1509         unsigned long base_addr_c;
1510         unsigned long y_offset;
1511         unsigned long c_offset;
1512
1513         if (!ovl->format->yuv) {
1514                 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1515                          * ovl->format->bpp / 8;
1516                 c_offset = 0;
1517         } else {
1518                 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1519                 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1520
1521                 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1522                 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1523                          + var->xoffset * 2 / xsub;
1524         }
1525
1526         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1527          * nothing to do in that case.
1528          */
1529         if (y_offset == ovl->pan_y_offset)
1530                 return 0;
1531
1532         /* Set the source address for the next refresh */
1533         base_addr_y = ovl->dma_handle + y_offset;
1534         base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1535                     + c_offset;
1536
1537         ovl->base_addr_y = base_addr_y;
1538         ovl->base_addr_c = base_addr_c;
1539         ovl->pan_y_offset = y_offset;
1540
1541         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1542
1543         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1544         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1545
1546         lcdc_write(ovl->channel->lcdc, LDBCR,
1547                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1548
1549         return 0;
1550 }
1551
1552 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1553                                       unsigned long arg)
1554 {
1555         struct sh_mobile_lcdc_overlay *ovl = info->par;
1556
1557         switch (cmd) {
1558         case FBIO_WAITFORVSYNC:
1559                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1560
1561         default:
1562                 return -ENOIOCTLCMD;
1563         }
1564 }
1565
1566 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1567                                           struct fb_info *info)
1568 {
1569         return __sh_mobile_lcdc_check_var(var, info);
1570 }
1571
1572 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1573 {
1574         struct sh_mobile_lcdc_overlay *ovl = info->par;
1575
1576         ovl->format =
1577                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1578
1579         ovl->xres = info->var.xres;
1580         ovl->xres_virtual = info->var.xres_virtual;
1581         ovl->yres = info->var.yres;
1582         ovl->yres_virtual = info->var.yres_virtual;
1583
1584         if (ovl->format->yuv)
1585                 ovl->pitch = info->var.xres_virtual;
1586         else
1587                 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1588
1589         sh_mobile_lcdc_overlay_setup(ovl);
1590
1591         info->fix.line_length = ovl->pitch;
1592
1593         if (sh_mobile_format_is_fourcc(&info->var)) {
1594                 info->fix.type = FB_TYPE_FOURCC;
1595                 info->fix.visual = FB_VISUAL_FOURCC;
1596         } else {
1597                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1598                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1599         }
1600
1601         return 0;
1602 }
1603
1604 /* Overlay blanking. Disable the overlay when blanked. */
1605 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1606 {
1607         struct sh_mobile_lcdc_overlay *ovl = info->par;
1608
1609         ovl->enabled = !blank;
1610         sh_mobile_lcdc_overlay_setup(ovl);
1611
1612         /* Prevent the backlight from receiving a blanking event by returning
1613          * a non-zero value.
1614          */
1615         return 1;
1616 }
1617
1618 static int
1619 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1620 {
1621         struct sh_mobile_lcdc_overlay *ovl = info->par;
1622
1623         return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1624                                  ovl->dma_handle, ovl->fb_size);
1625 }
1626
1627 static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1628         .owner          = THIS_MODULE,
1629         .fb_read        = fb_sys_read,
1630         .fb_write       = fb_sys_write,
1631         .fb_fillrect    = sys_fillrect,
1632         .fb_copyarea    = sys_copyarea,
1633         .fb_imageblit   = sys_imageblit,
1634         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1635         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1636         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1637         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1638         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1639         .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1640 };
1641
1642 static void
1643 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1644 {
1645         struct fb_info *info = ovl->info;
1646
1647         if (info == NULL || info->dev == NULL)
1648                 return;
1649
1650         unregister_framebuffer(ovl->info);
1651 }
1652
1653 static int
1654 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1655 {
1656         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1657         struct fb_info *info = ovl->info;
1658         unsigned int i;
1659         int ret;
1660
1661         if (info == NULL)
1662                 return 0;
1663
1664         ret = register_framebuffer(info);
1665         if (ret < 0)
1666                 return ret;
1667
1668         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1669                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1670                  info->var.yres, info->var.bits_per_pixel);
1671
1672         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1673                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1674                 if (ret < 0)
1675                         return ret;
1676         }
1677
1678         return 0;
1679 }
1680
1681 static void
1682 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1683 {
1684         struct fb_info *info = ovl->info;
1685
1686         if (info == NULL || info->device == NULL)
1687                 return;
1688
1689         framebuffer_release(info);
1690 }
1691
1692 static int
1693 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1694 {
1695         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1696         struct fb_var_screeninfo *var;
1697         struct fb_info *info;
1698
1699         /* Allocate and initialize the frame buffer device. */
1700         info = framebuffer_alloc(0, priv->dev);
1701         if (info == NULL) {
1702                 dev_err(priv->dev, "unable to allocate fb_info\n");
1703                 return -ENOMEM;
1704         }
1705
1706         ovl->info = info;
1707
1708         info->flags = FBINFO_FLAG_DEFAULT;
1709         info->fbops = &sh_mobile_lcdc_overlay_ops;
1710         info->device = priv->dev;
1711         info->screen_base = ovl->fb_mem;
1712         info->par = ovl;
1713
1714         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1715          * for NV12 and NV21.
1716          */
1717         info->fix = sh_mobile_lcdc_overlay_fix;
1718         snprintf(info->fix.id, sizeof(info->fix.id),
1719                  "SH Mobile LCDC Overlay %u", ovl->index);
1720         info->fix.smem_start = ovl->dma_handle;
1721         info->fix.smem_len = ovl->fb_size;
1722         info->fix.line_length = ovl->pitch;
1723
1724         if (ovl->format->yuv)
1725                 info->fix.visual = FB_VISUAL_FOURCC;
1726         else
1727                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1728
1729         switch (ovl->format->fourcc) {
1730         case V4L2_PIX_FMT_NV12:
1731         case V4L2_PIX_FMT_NV21:
1732                 info->fix.ypanstep = 2;
1733         case V4L2_PIX_FMT_NV16:
1734         case V4L2_PIX_FMT_NV61:
1735                 info->fix.xpanstep = 2;
1736         }
1737
1738         /* Initialize variable screen information. */
1739         var = &info->var;
1740         memset(var, 0, sizeof(*var));
1741         var->xres = ovl->xres;
1742         var->yres = ovl->yres;
1743         var->xres_virtual = ovl->xres_virtual;
1744         var->yres_virtual = ovl->yres_virtual;
1745         var->activate = FB_ACTIVATE_NOW;
1746
1747         /* Use the legacy API by default for RGB formats, and the FOURCC API
1748          * for YUV formats.
1749          */
1750         if (!ovl->format->yuv)
1751                 var->bits_per_pixel = ovl->format->bpp;
1752         else
1753                 var->grayscale = ovl->format->fourcc;
1754
1755         return sh_mobile_lcdc_overlay_check_var(var, info);
1756 }
1757
1758 /* -----------------------------------------------------------------------------
1759  * Frame buffer operations - main frame buffer
1760  */
1761
1762 static int sh_mobile_lcdc_setcolreg(u_int regno,
1763                                     u_int red, u_int green, u_int blue,
1764                                     u_int transp, struct fb_info *info)
1765 {
1766         u32 *palette = info->pseudo_palette;
1767
1768         if (regno >= PALETTE_NR)
1769                 return -EINVAL;
1770
1771         /* only FB_VISUAL_TRUECOLOR supported */
1772
1773         red >>= 16 - info->var.red.length;
1774         green >>= 16 - info->var.green.length;
1775         blue >>= 16 - info->var.blue.length;
1776         transp >>= 16 - info->var.transp.length;
1777
1778         palette[regno] = (red << info->var.red.offset) |
1779           (green << info->var.green.offset) |
1780           (blue << info->var.blue.offset) |
1781           (transp << info->var.transp.offset);
1782
1783         return 0;
1784 }
1785
1786 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1787         .id =           "SH Mobile LCDC",
1788         .type =         FB_TYPE_PACKED_PIXELS,
1789         .visual =       FB_VISUAL_TRUECOLOR,
1790         .accel =        FB_ACCEL_NONE,
1791         .xpanstep =     1,
1792         .ypanstep =     1,
1793         .ywrapstep =    0,
1794         .capabilities = FB_CAP_FOURCC,
1795 };
1796
1797 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1798                                     const struct fb_fillrect *rect)
1799 {
1800         sys_fillrect(info, rect);
1801         sh_mobile_lcdc_deferred_io_touch(info);
1802 }
1803
1804 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1805                                     const struct fb_copyarea *area)
1806 {
1807         sys_copyarea(info, area);
1808         sh_mobile_lcdc_deferred_io_touch(info);
1809 }
1810
1811 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1812                                      const struct fb_image *image)
1813 {
1814         sys_imageblit(info, image);
1815         sh_mobile_lcdc_deferred_io_touch(info);
1816 }
1817
1818 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1819                               struct fb_info *info)
1820 {
1821         struct sh_mobile_lcdc_chan *ch = info->par;
1822         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1823         unsigned long ldrcntr;
1824         unsigned long base_addr_y, base_addr_c;
1825         unsigned long y_offset;
1826         unsigned long c_offset;
1827
1828         if (!ch->format->yuv) {
1829                 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1830                          * ch->format->bpp / 8;
1831                 c_offset = 0;
1832         } else {
1833                 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1834                 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1835
1836                 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1837                 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1838                          + var->xoffset * 2 / xsub;
1839         }
1840
1841         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1842          * nothing to do in that case.
1843          */
1844         if (y_offset == ch->pan_y_offset)
1845                 return 0;
1846
1847         /* Set the source address for the next refresh */
1848         base_addr_y = ch->dma_handle + y_offset;
1849         base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1850                     + c_offset;
1851
1852         if (ch->cache)
1853                 sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1854                                              base_addr_y, base_addr_c,
1855                                              &base_addr_y, &base_addr_c);
1856
1857         ch->base_addr_y = base_addr_y;
1858         ch->base_addr_c = base_addr_c;
1859         ch->pan_y_offset = y_offset;
1860
1861         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1862         if (ch->format->yuv)
1863                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1864
1865         ldrcntr = lcdc_read(priv, _LDRCNTR);
1866         if (lcdc_chan_is_sublcd(ch))
1867                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1868         else
1869                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1870
1871
1872         sh_mobile_lcdc_deferred_io_touch(info);
1873
1874         return 0;
1875 }
1876
1877 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1878                                 unsigned long arg)
1879 {
1880         struct sh_mobile_lcdc_chan *ch = info->par;
1881         int retval;
1882
1883         switch (cmd) {
1884         case FBIO_WAITFORVSYNC:
1885                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1886                 break;
1887
1888         default:
1889                 retval = -ENOIOCTLCMD;
1890                 break;
1891         }
1892         return retval;
1893 }
1894
1895 static void sh_mobile_fb_reconfig(struct fb_info *info)
1896 {
1897         struct sh_mobile_lcdc_chan *ch = info->par;
1898         struct fb_var_screeninfo var;
1899         struct fb_videomode mode;
1900         struct fb_event event;
1901         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1902
1903         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1904                 /* More framebuffer users are active */
1905                 return;
1906
1907         fb_var_to_videomode(&mode, &info->var);
1908
1909         if (fb_mode_is_equal(&ch->display.mode, &mode))
1910                 return;
1911
1912         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1913         var = info->var;
1914         fb_videomode_to_var(&var, &ch->display.mode);
1915         var.width = ch->display.width;
1916         var.height = ch->display.height;
1917         var.activate = FB_ACTIVATE_NOW;
1918
1919         if (fb_set_var(info, &var) < 0)
1920                 /* Couldn't reconfigure, hopefully, can continue as before */
1921                 return;
1922
1923         /*
1924          * fb_set_var() calls the notifier change internally, only if
1925          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1926          * user event, we have to call the chain ourselves.
1927          */
1928         event.info = info;
1929         event.data = &ch->display.mode;
1930         fb_notifier_call_chain(evnt, &event);
1931 }
1932
1933 /*
1934  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1935  * user == 1, or with console sem held, if user == 0.
1936  */
1937 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1938 {
1939         struct sh_mobile_lcdc_chan *ch = info->par;
1940
1941         mutex_lock(&ch->open_lock);
1942         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1943
1944         ch->use_count--;
1945
1946         /* Nothing to reconfigure, when called from fbcon */
1947         if (user) {
1948                 console_lock();
1949                 sh_mobile_fb_reconfig(info);
1950                 console_unlock();
1951         }
1952
1953         mutex_unlock(&ch->open_lock);
1954
1955         return 0;
1956 }
1957
1958 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1959 {
1960         struct sh_mobile_lcdc_chan *ch = info->par;
1961
1962         mutex_lock(&ch->open_lock);
1963         ch->use_count++;
1964
1965         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1966         mutex_unlock(&ch->open_lock);
1967
1968         return 0;
1969 }
1970
1971 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1972                                     struct fb_info *info)
1973 {
1974         struct sh_mobile_lcdc_chan *ch = info->par;
1975         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1976         unsigned int best_dist = (unsigned int)-1;
1977         unsigned int best_xres = 0;
1978         unsigned int best_yres = 0;
1979         unsigned int i;
1980         int ret;
1981
1982         /* If board code provides us with a list of available modes, make sure
1983          * we use one of them. Find the mode closest to the requested one. The
1984          * distance between two modes is defined as the size of the
1985          * non-overlapping parts of the two rectangles.
1986          */
1987         for (i = 0; i < ch->cfg->num_modes; ++i) {
1988                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1989                 unsigned int dist;
1990
1991                 /* We can only round up. */
1992                 if (var->xres > mode->xres || var->yres > mode->yres)
1993                         continue;
1994
1995                 dist = var->xres * var->yres + mode->xres * mode->yres
1996                      - 2 * min(var->xres, mode->xres)
1997                          * min(var->yres, mode->yres);
1998
1999                 if (dist < best_dist) {
2000                         best_xres = mode->xres;
2001                         best_yres = mode->yres;
2002                         best_dist = dist;
2003                 }
2004         }
2005
2006         /* If no available mode can be used, return an error. */
2007         if (ch->cfg->num_modes != 0) {
2008                 if (best_dist == (unsigned int)-1)
2009                         return -EINVAL;
2010
2011                 var->xres = best_xres;
2012                 var->yres = best_yres;
2013         }
2014
2015         ret = __sh_mobile_lcdc_check_var(var, info);
2016         if (ret < 0)
2017                 return ret;
2018
2019         /* only accept the forced_fourcc for dual channel configurations */
2020         if (p->forced_fourcc &&
2021             p->forced_fourcc != sh_mobile_format_fourcc(var))
2022                 return -EINVAL;
2023
2024         return 0;
2025 }
2026
2027 static int sh_mobile_lcdc_set_par(struct fb_info *info)
2028 {
2029         struct sh_mobile_lcdc_chan *ch = info->par;
2030         int ret;
2031
2032         sh_mobile_lcdc_stop(ch->lcdc);
2033
2034         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2035         ch->colorspace = info->var.colorspace;
2036
2037         ch->xres = info->var.xres;
2038         ch->xres_virtual = info->var.xres_virtual;
2039         ch->yres = info->var.yres;
2040         ch->yres_virtual = info->var.yres_virtual;
2041
2042         if (ch->format->yuv)
2043                 ch->pitch = info->var.xres_virtual;
2044         else
2045                 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2046
2047         ret = sh_mobile_lcdc_start(ch->lcdc);
2048         if (ret < 0)
2049                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2050
2051         info->fix.line_length = ch->pitch;
2052
2053         if (sh_mobile_format_is_fourcc(&info->var)) {
2054                 info->fix.type = FB_TYPE_FOURCC;
2055                 info->fix.visual = FB_VISUAL_FOURCC;
2056         } else {
2057                 info->fix.type = FB_TYPE_PACKED_PIXELS;
2058                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2059         }
2060
2061         return ret;
2062 }
2063
2064 /*
2065  * Screen blanking. Behavior is as follows:
2066  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2067  * FB_BLANK_NORMAL: screen blanked, clocks enabled
2068  * FB_BLANK_VSYNC,
2069  * FB_BLANK_HSYNC,
2070  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2071  */
2072 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2073 {
2074         struct sh_mobile_lcdc_chan *ch = info->par;
2075         struct sh_mobile_lcdc_priv *p = ch->lcdc;
2076
2077         /* blank the screen? */
2078         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2079                 struct fb_fillrect rect = {
2080                         .width = ch->xres,
2081                         .height = ch->yres,
2082                 };
2083                 sh_mobile_lcdc_fillrect(info, &rect);
2084         }
2085         /* turn clocks on? */
2086         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2087                 sh_mobile_lcdc_clk_on(p);
2088         }
2089         /* turn clocks off? */
2090         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2091                 /* make sure the screen is updated with the black fill before
2092                  * switching the clocks off. one vsync is not enough since
2093                  * blanking may occur in the middle of a refresh. deferred io
2094                  * mode will reenable the clocks and update the screen in time,
2095                  * so it does not need this. */
2096                 if (!info->fbdefio) {
2097                         sh_mobile_lcdc_wait_for_vsync(ch);
2098                         sh_mobile_lcdc_wait_for_vsync(ch);
2099                 }
2100                 sh_mobile_lcdc_clk_off(p);
2101         }
2102
2103         ch->blank_status = blank;
2104         return 0;
2105 }
2106
2107 static int
2108 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
2109 {
2110         struct sh_mobile_lcdc_chan *ch = info->par;
2111
2112         return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
2113                                  ch->dma_handle, ch->fb_size);
2114 }
2115
2116 static struct fb_ops sh_mobile_lcdc_ops = {
2117         .owner          = THIS_MODULE,
2118         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2119         .fb_read        = fb_sys_read,
2120         .fb_write       = fb_sys_write,
2121         .fb_fillrect    = sh_mobile_lcdc_fillrect,
2122         .fb_copyarea    = sh_mobile_lcdc_copyarea,
2123         .fb_imageblit   = sh_mobile_lcdc_imageblit,
2124         .fb_blank       = sh_mobile_lcdc_blank,
2125         .fb_pan_display = sh_mobile_lcdc_pan,
2126         .fb_ioctl       = sh_mobile_lcdc_ioctl,
2127         .fb_open        = sh_mobile_lcdc_open,
2128         .fb_release     = sh_mobile_lcdc_release,
2129         .fb_check_var   = sh_mobile_lcdc_check_var,
2130         .fb_set_par     = sh_mobile_lcdc_set_par,
2131         .fb_mmap        = sh_mobile_lcdc_mmap,
2132 };
2133
2134 static void
2135 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2136 {
2137         if (ch->info && ch->info->dev)
2138                 unregister_framebuffer(ch->info);
2139 }
2140
2141 static int
2142 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2143 {
2144         struct fb_info *info = ch->info;
2145         int ret;
2146
2147         if (info->fbdefio) {
2148                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2149                                      ch->fb_size >> PAGE_SHIFT);
2150                 if (!ch->sglist) {
2151                         dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2152                         return -ENOMEM;
2153                 }
2154         }
2155
2156         info->bl_dev = ch->bl;
2157
2158         ret = register_framebuffer(info);
2159         if (ret < 0)
2160                 return ret;
2161
2162         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2163                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2164                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2165                  info->var.bits_per_pixel);
2166
2167         /* deferred io mode: disable clock to save power */
2168         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2169                 sh_mobile_lcdc_clk_off(ch->lcdc);
2170
2171         return ret;
2172 }
2173
2174 static void
2175 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2176 {
2177         struct fb_info *info = ch->info;
2178
2179         if (!info || !info->device)
2180                 return;
2181
2182         if (ch->sglist)
2183                 vfree(ch->sglist);
2184
2185         fb_dealloc_cmap(&info->cmap);
2186         framebuffer_release(info);
2187 }
2188
2189 static int
2190 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2191                                const struct fb_videomode *modes,
2192                                unsigned int num_modes)
2193 {
2194         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2195         struct fb_var_screeninfo *var;
2196         struct fb_info *info;
2197         int ret;
2198
2199         /* Allocate and initialize the frame buffer device. Create the modes
2200          * list and allocate the color map.
2201          */
2202         info = framebuffer_alloc(0, priv->dev);
2203         if (info == NULL) {
2204                 dev_err(priv->dev, "unable to allocate fb_info\n");
2205                 return -ENOMEM;
2206         }
2207
2208         ch->info = info;
2209
2210         info->flags = FBINFO_FLAG_DEFAULT;
2211         info->fbops = &sh_mobile_lcdc_ops;
2212         info->device = priv->dev;
2213         info->screen_base = ch->fb_mem;
2214         info->pseudo_palette = &ch->pseudo_palette;
2215         info->par = ch;
2216
2217         fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2218
2219         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2220         if (ret < 0) {
2221                 dev_err(priv->dev, "unable to allocate cmap\n");
2222                 return ret;
2223         }
2224
2225         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2226          * for NV12 and NV21.
2227          */
2228         info->fix = sh_mobile_lcdc_fix;
2229         info->fix.smem_start = ch->dma_handle;
2230         info->fix.smem_len = ch->fb_size;
2231         info->fix.line_length = ch->pitch;
2232
2233         if (ch->format->yuv)
2234                 info->fix.visual = FB_VISUAL_FOURCC;
2235         else
2236                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2237
2238         switch (ch->format->fourcc) {
2239         case V4L2_PIX_FMT_NV12:
2240         case V4L2_PIX_FMT_NV21:
2241                 info->fix.ypanstep = 2;
2242         case V4L2_PIX_FMT_NV16:
2243         case V4L2_PIX_FMT_NV61:
2244                 info->fix.xpanstep = 2;
2245         }
2246
2247         /* Initialize variable screen information using the first mode as
2248          * default.
2249          */
2250         var = &info->var;
2251         fb_videomode_to_var(var, modes);
2252         var->width = ch->display.width;
2253         var->height = ch->display.height;
2254         var->xres_virtual = ch->xres_virtual;
2255         var->yres_virtual = ch->yres_virtual;
2256         var->activate = FB_ACTIVATE_NOW;
2257
2258         /* Use the legacy API by default for RGB formats, and the FOURCC API
2259          * for YUV formats.
2260          */
2261         if (!ch->format->yuv)
2262                 var->bits_per_pixel = ch->format->bpp;
2263         else
2264                 var->grayscale = ch->format->fourcc;
2265
2266         ret = sh_mobile_lcdc_check_var(var, info);
2267         if (ret)
2268                 return ret;
2269
2270         return 0;
2271 }
2272
2273 /* -----------------------------------------------------------------------------
2274  * Backlight
2275  */
2276
2277 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2278 {
2279         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2280         int brightness = bdev->props.brightness;
2281
2282         if (bdev->props.power != FB_BLANK_UNBLANK ||
2283             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2284                 brightness = 0;
2285
2286         ch->bl_brightness = brightness;
2287         return ch->cfg->bl_info.set_brightness(brightness);
2288 }
2289
2290 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2291 {
2292         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2293
2294         return ch->bl_brightness;
2295 }
2296
2297 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2298                                    struct fb_info *info)
2299 {
2300         return (info->bl_dev == bdev);
2301 }
2302
2303 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2304         .options        = BL_CORE_SUSPENDRESUME,
2305         .update_status  = sh_mobile_lcdc_update_bl,
2306         .get_brightness = sh_mobile_lcdc_get_brightness,
2307         .check_fb       = sh_mobile_lcdc_check_fb,
2308 };
2309
2310 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2311                                                struct sh_mobile_lcdc_chan *ch)
2312 {
2313         struct backlight_device *bl;
2314
2315         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2316                                        &sh_mobile_lcdc_bl_ops, NULL);
2317         if (IS_ERR(bl)) {
2318                 dev_err(parent, "unable to register backlight device: %ld\n",
2319                         PTR_ERR(bl));
2320                 return NULL;
2321         }
2322
2323         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2324         bl->props.brightness = bl->props.max_brightness;
2325         backlight_update_status(bl);
2326
2327         return bl;
2328 }
2329
2330 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2331 {
2332         backlight_device_unregister(bdev);
2333 }
2334
2335 /* -----------------------------------------------------------------------------
2336  * Power management
2337  */
2338
2339 static int sh_mobile_lcdc_suspend(struct device *dev)
2340 {
2341         struct platform_device *pdev = to_platform_device(dev);
2342
2343         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2344         return 0;
2345 }
2346
2347 static int sh_mobile_lcdc_resume(struct device *dev)
2348 {
2349         struct platform_device *pdev = to_platform_device(dev);
2350
2351         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2352 }
2353
2354 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2355 {
2356         struct platform_device *pdev = to_platform_device(dev);
2357         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2358
2359         /* turn off LCDC hardware */
2360         lcdc_write(priv, _LDCNT1R, 0);
2361
2362         return 0;
2363 }
2364
2365 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2366 {
2367         struct platform_device *pdev = to_platform_device(dev);
2368         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2369
2370         __sh_mobile_lcdc_start(priv);
2371
2372         return 0;
2373 }
2374
2375 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2376         .suspend = sh_mobile_lcdc_suspend,
2377         .resume = sh_mobile_lcdc_resume,
2378         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2379         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2380 };
2381
2382 /* -----------------------------------------------------------------------------
2383  * Framebuffer notifier
2384  */
2385
2386 /* locking: called with info->lock held */
2387 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2388                                  unsigned long action, void *data)
2389 {
2390         struct fb_event *event = data;
2391         struct fb_info *info = event->info;
2392         struct sh_mobile_lcdc_chan *ch = info->par;
2393
2394         if (&ch->lcdc->notifier != nb)
2395                 return NOTIFY_DONE;
2396
2397         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2398                 __func__, action, event->data);
2399
2400         switch(action) {
2401         case FB_EVENT_SUSPEND:
2402                 sh_mobile_lcdc_display_off(ch);
2403                 sh_mobile_lcdc_stop(ch->lcdc);
2404                 break;
2405         case FB_EVENT_RESUME:
2406                 mutex_lock(&ch->open_lock);
2407                 sh_mobile_fb_reconfig(info);
2408                 mutex_unlock(&ch->open_lock);
2409
2410                 sh_mobile_lcdc_display_on(ch);
2411                 sh_mobile_lcdc_start(ch->lcdc);
2412         }
2413
2414         return NOTIFY_OK;
2415 }
2416
2417 /* -----------------------------------------------------------------------------
2418  * Probe/remove and driver init/exit
2419  */
2420
2421 static const struct fb_videomode default_720p = {
2422         .name = "HDMI 720p",
2423         .xres = 1280,
2424         .yres = 720,
2425
2426         .left_margin = 220,
2427         .right_margin = 110,
2428         .hsync_len = 40,
2429
2430         .upper_margin = 20,
2431         .lower_margin = 5,
2432         .vsync_len = 5,
2433
2434         .pixclock = 13468,
2435         .refresh = 60,
2436         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2437 };
2438
2439 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2440 {
2441         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2442         unsigned int i;
2443
2444         fb_unregister_client(&priv->notifier);
2445
2446         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2447                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2448         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2449                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2450
2451         sh_mobile_lcdc_stop(priv);
2452
2453         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2454                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2455
2456                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2457
2458                 if (ovl->fb_mem)
2459                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2460                                           ovl->fb_mem, ovl->dma_handle);
2461         }
2462
2463         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2464                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2465
2466                 if (ch->tx_dev) {
2467                         ch->tx_dev->lcdc = NULL;
2468                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2469                 }
2470
2471                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2472
2473                 if (ch->fb_mem)
2474                         dma_free_coherent(&pdev->dev, ch->fb_size,
2475                                           ch->fb_mem, ch->dma_handle);
2476         }
2477
2478         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2479                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2480
2481                 if (ch->bl)
2482                         sh_mobile_lcdc_bl_remove(ch->bl);
2483                 mutex_destroy(&ch->open_lock);
2484         }
2485
2486         if (priv->dot_clk) {
2487                 pm_runtime_disable(&pdev->dev);
2488                 clk_put(priv->dot_clk);
2489         }
2490
2491         if (priv->base)
2492                 iounmap(priv->base);
2493
2494         if (priv->irq)
2495                 free_irq(priv->irq, priv);
2496         kfree(priv);
2497         return 0;
2498 }
2499
2500 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2501 {
2502         int interface_type = ch->cfg->interface_type;
2503
2504         switch (interface_type) {
2505         case RGB8:
2506         case RGB9:
2507         case RGB12A:
2508         case RGB12B:
2509         case RGB16:
2510         case RGB18:
2511         case RGB24:
2512         case SYS8A:
2513         case SYS8B:
2514         case SYS8C:
2515         case SYS8D:
2516         case SYS9:
2517         case SYS12:
2518         case SYS16A:
2519         case SYS16B:
2520         case SYS16C:
2521         case SYS18:
2522         case SYS24:
2523                 break;
2524         default:
2525                 return -EINVAL;
2526         }
2527
2528         /* SUBLCD only supports SYS interface */
2529         if (lcdc_chan_is_sublcd(ch)) {
2530                 if (!(interface_type & LDMT1R_IFM))
2531                         return -EINVAL;
2532
2533                 interface_type &= ~LDMT1R_IFM;
2534         }
2535
2536         ch->ldmt1r_value = interface_type;
2537         return 0;
2538 }
2539
2540 static int
2541 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2542 {
2543         const struct sh_mobile_lcdc_format_info *format;
2544         struct device *dev = ovl->channel->lcdc->dev;
2545         int ret;
2546
2547         if (ovl->cfg->fourcc == 0)
2548                 return 0;
2549
2550         /* Validate the format. */
2551         format = sh_mobile_format_info(ovl->cfg->fourcc);
2552         if (format == NULL) {
2553                 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2554                 return -EINVAL;
2555         }
2556
2557         ovl->enabled = false;
2558         ovl->mode = LCDC_OVERLAY_BLEND;
2559         ovl->alpha = 255;
2560         ovl->rop3 = 0;
2561         ovl->pos_x = 0;
2562         ovl->pos_y = 0;
2563
2564         /* The default Y virtual resolution is twice the panel size to allow for
2565          * double-buffering.
2566          */
2567         ovl->format = format;
2568         ovl->xres = ovl->cfg->max_xres;
2569         ovl->xres_virtual = ovl->xres;
2570         ovl->yres = ovl->cfg->max_yres;
2571         ovl->yres_virtual = ovl->yres * 2;
2572
2573         if (!format->yuv)
2574                 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2575         else
2576                 ovl->pitch = ovl->xres_virtual;
2577
2578         /* Allocate frame buffer memory. */
2579         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2580                        * format->bpp / 8 * 2;
2581         ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2582                                          GFP_KERNEL);
2583         if (!ovl->fb_mem) {
2584                 dev_err(dev, "unable to allocate buffer\n");
2585                 return -ENOMEM;
2586         }
2587
2588         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2589         if (ret < 0)
2590                 return ret;
2591
2592         return 0;
2593 }
2594
2595 static int
2596 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2597 {
2598         const struct sh_mobile_lcdc_format_info *format;
2599         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2600         struct device *dev = ch->lcdc->dev;
2601         const struct fb_videomode *max_mode;
2602         const struct fb_videomode *mode;
2603         unsigned int num_modes;
2604         unsigned int max_size;
2605         unsigned int i;
2606
2607         mutex_init(&ch->open_lock);
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 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         i = platform_get_irq(pdev, 0);
2715         if (!res || i < 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         platform_set_drvdata(pdev, priv);
2729
2730         error = request_irq(i, sh_mobile_lcdc_irq, 0,
2731                             dev_name(&pdev->dev), priv);
2732         if (error) {
2733                 dev_err(&pdev->dev, "unable to request irq\n");
2734                 goto err1;
2735         }
2736
2737         priv->irq = i;
2738         atomic_set(&priv->hw_usecnt, -1);
2739
2740         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2741                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2742
2743                 ch->lcdc = priv;
2744                 ch->cfg = &pdata->ch[i];
2745
2746                 error = sh_mobile_lcdc_check_interface(ch);
2747                 if (error) {
2748                         dev_err(&pdev->dev, "unsupported interface type\n");
2749                         goto err1;
2750                 }
2751                 init_waitqueue_head(&ch->frame_end_wait);
2752                 init_completion(&ch->vsync_completion);
2753
2754                 /* probe the backlight is there is one defined */
2755                 if (ch->cfg->bl_info.max_brightness)
2756                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2757
2758                 switch (pdata->ch[i].chan) {
2759                 case LCDC_CHAN_MAINLCD:
2760                         ch->enabled = LDCNT2R_ME;
2761                         ch->reg_offs = lcdc_offs_mainlcd;
2762                         num_channels++;
2763                         break;
2764                 case LCDC_CHAN_SUBLCD:
2765                         ch->enabled = LDCNT2R_SE;
2766                         ch->reg_offs = lcdc_offs_sublcd;
2767                         num_channels++;
2768                         break;
2769                 }
2770         }
2771
2772         if (!num_channels) {
2773                 dev_err(&pdev->dev, "no channels defined\n");
2774                 error = -EINVAL;
2775                 goto err1;
2776         }
2777
2778         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2779         if (num_channels == 2)
2780                 priv->forced_fourcc = pdata->ch[0].fourcc;
2781
2782         priv->base = ioremap_nocache(res->start, resource_size(res));
2783         if (!priv->base)
2784                 goto err1;
2785
2786         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2787         if (error) {
2788                 dev_err(&pdev->dev, "unable to setup clocks\n");
2789                 goto err1;
2790         }
2791
2792         /* Enable runtime PM. */
2793         pm_runtime_enable(&pdev->dev);
2794
2795         for (i = 0; i < num_channels; i++) {
2796                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2797
2798                 error = sh_mobile_lcdc_channel_init(ch);
2799                 if (error)
2800                         goto err1;
2801         }
2802
2803         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2804                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2805
2806                 ovl->cfg = &pdata->overlays[i];
2807                 ovl->channel = &priv->ch[0];
2808
2809                 error = sh_mobile_lcdc_overlay_init(ovl);
2810                 if (error)
2811                         goto err1;
2812         }
2813
2814         error = sh_mobile_lcdc_start(priv);
2815         if (error) {
2816                 dev_err(&pdev->dev, "unable to start hardware\n");
2817                 goto err1;
2818         }
2819
2820         for (i = 0; i < num_channels; i++) {
2821                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2822
2823                 error = sh_mobile_lcdc_channel_fb_register(ch);
2824                 if (error)
2825                         goto err1;
2826         }
2827
2828         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2829                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2830
2831                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2832                 if (error)
2833                         goto err1;
2834         }
2835
2836         /* Failure ignored */
2837         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2838         fb_register_client(&priv->notifier);
2839
2840         return 0;
2841 err1:
2842         sh_mobile_lcdc_remove(pdev);
2843
2844         return error;
2845 }
2846
2847 static struct platform_driver sh_mobile_lcdc_driver = {
2848         .driver         = {
2849                 .name           = "sh_mobile_lcdc_fb",
2850                 .owner          = THIS_MODULE,
2851                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2852         },
2853         .probe          = sh_mobile_lcdc_probe,
2854         .remove         = sh_mobile_lcdc_remove,
2855 };
2856
2857 module_platform_driver(sh_mobile_lcdc_driver);
2858
2859 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2860 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2861 MODULE_LICENSE("GPL v2");