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 }
 862
 863 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 864 {
 865         u32 format = 0;
 866
 867         if (!ovl->enabled) {
 868                 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 869                 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 870                 lcdc_write(ovl->channel->lcdc, LDBCR,
 871                            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 872                 return;
 873         }
 874
 875         ovl->base_addr_y = ovl->dma_handle;
 876         ovl->base_addr_c = ovl->dma_handle
 877                          + ovl->xres_virtual * ovl->yres_virtual;
 878
 879         switch (ovl->mode) {
 880         case LCDC_OVERLAY_BLEND:
 881                 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 882                 break;
 883
 884         case LCDC_OVERLAY_ROP3:
 885                 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 886                        | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 887                 break;
 888         }
 889
 890         switch (ovl->format->fourcc) {
 891         case V4L2_PIX_FMT_RGB565:
 892         case V4L2_PIX_FMT_NV21:
 893         case V4L2_PIX_FMT_NV61:
 894         case V4L2_PIX_FMT_NV42:
 895                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 896                 break;
 897         case V4L2_PIX_FMT_BGR24:
 898         case V4L2_PIX_FMT_NV12:
 899         case V4L2_PIX_FMT_NV16:
 900         case V4L2_PIX_FMT_NV24:
 901                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 902                 break;
 903         case V4L2_PIX_FMT_BGR32:
 904         default:
 905                 format |= LDBBSIFR_SWPL;
 906                 break;
 907         }
 908
 909         switch (ovl->format->fourcc) {
 910         case V4L2_PIX_FMT_RGB565:
 911                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 912                 break;
 913         case V4L2_PIX_FMT_BGR24:
 914                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 915                 break;
 916         case V4L2_PIX_FMT_BGR32:
 917                 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 918                 break;
 919         case V4L2_PIX_FMT_NV12:
 920         case V4L2_PIX_FMT_NV21:
 921                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 922                 break;
 923         case V4L2_PIX_FMT_NV16:
 924         case V4L2_PIX_FMT_NV61:
 925                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 926                 break;
 927         case V4L2_PIX_FMT_NV24:
 928         case V4L2_PIX_FMT_NV42:
 929                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 930                 break;
 931         }
 932
 933         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 934
 935         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 936
 937         lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 938                 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 939                 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 940         lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 941                 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 942                 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 943         lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 944                 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 945
 946         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 947         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 948
 949         lcdc_write(ovl->channel->lcdc, LDBCR,
 950                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 951 }
 952
 953 /*
 954  * __sh_mobile_lcdc_start - Configure and start the LCDC
 955  * @priv: LCDC device
 956  *
 957  * Configure all enabled channels and start the LCDC device. All external
 958  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 959  */
 960 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 961 {
 962         struct sh_mobile_lcdc_chan *ch;
 963         unsigned long tmp;
 964         int k, m;
 965
 966         /* Enable LCDC channels. Read data from external memory, avoid using the
 967          * BEU for now.
 968          */
 969         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 970
 971         /* Stop the LCDC first and disable all interrupts. */
 972         sh_mobile_lcdc_start_stop(priv, 0);
 973         lcdc_write(priv, _LDINTR, 0);
 974
 975         /* Configure power supply, dot clocks and start them. */
 976         tmp = priv->lddckr;
 977         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 978                 ch = &priv->ch[k];
 979                 if (!ch->enabled)
 980                         continue;
 981
 982                 /* Power supply */
 983                 lcdc_write_chan(ch, LDPMR, 0);
 984
 985                 m = ch->cfg->clock_divider;
 986                 if (!m)
 987                         continue;
 988
 989                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 990                  * denominator.
 991                  */
 992                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 993                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 994
 995                 if (m == 1)
 996                         m = LDDCKR_MOSEL;
 997                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 998         }
 999
1000         lcdc_write(priv, _LDDCKR, tmp);
1001         lcdc_write(priv, _LDDCKSTPR, 0);
1002         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1003
1004         /* Setup geometry, format, frame buffer memory and operation mode. */
1005         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1006                 ch = &priv->ch[k];
1007                 if (!ch->enabled)
1008                         continue;
1009
1010                 sh_mobile_lcdc_geometry(ch);
1011
1012                 tmp = ch->format->lddfr;
1013
1014                 if (ch->format->yuv) {
1015                         switch (ch->colorspace) {
1016                         case V4L2_COLORSPACE_REC709:
1017                                 tmp |= LDDFR_CF1;
1018                                 break;
1019                         case V4L2_COLORSPACE_JPEG:
1020                                 tmp |= LDDFR_CF0;
1021                                 break;
1022                         }
1023                 }
1024
1025                 lcdc_write_chan(ch, LDDFR, tmp);
1026                 lcdc_write_chan(ch, LDMLSR, ch->line_size);
1027                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1028                 if (ch->format->yuv)
1029                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1030
1031                 /* When using deferred I/O mode, configure the LCDC for one-shot
1032                  * operation and enable the frame end interrupt. Otherwise use
1033                  * continuous read mode.
1034                  */
1035                 if (ch->ldmt1r_value & LDMT1R_IFM &&
1036                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
1037                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1038                         lcdc_write(priv, _LDINTR, LDINTR_FE);
1039                 } else {
1040                         lcdc_write_chan(ch, LDSM1R, 0);
1041                 }
1042         }
1043
1044         /* Word and long word swap. */
1045         switch (priv->ch[0].format->fourcc) {
1046         case V4L2_PIX_FMT_RGB565:
1047         case V4L2_PIX_FMT_NV21:
1048         case V4L2_PIX_FMT_NV61:
1049         case V4L2_PIX_FMT_NV42:
1050                 tmp = LDDDSR_LS | LDDDSR_WS;
1051                 break;
1052         case V4L2_PIX_FMT_BGR24:
1053         case V4L2_PIX_FMT_NV12:
1054         case V4L2_PIX_FMT_NV16:
1055         case V4L2_PIX_FMT_NV24:
1056                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1057                 break;
1058         case V4L2_PIX_FMT_BGR32:
1059         default:
1060                 tmp = LDDDSR_LS;
1061                 break;
1062         }
1063         lcdc_write(priv, _LDDDSR, tmp);
1064
1065         /* Enable the display output. */
1066         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1067         sh_mobile_lcdc_start_stop(priv, 1);
1068         priv->started = 1;
1069 }
1070
1071 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1072 {
1073         struct sh_mobile_meram_info *mdev = priv->meram_dev;
1074         struct sh_mobile_lcdc_chan *ch;
1075         unsigned long tmp;
1076         int ret;
1077         int k;
1078
1079         /* enable clocks before accessing the hardware */
1080         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1081                 if (priv->ch[k].enabled)
1082                         sh_mobile_lcdc_clk_on(priv);
1083         }
1084
1085         /* reset */
1086         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1087         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1088
1089         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1090                 const struct sh_mobile_lcdc_panel_cfg *panel;
1091
1092                 ch = &priv->ch[k];
1093                 if (!ch->enabled)
1094                         continue;
1095
1096                 panel = &ch->cfg->panel_cfg;
1097                 if (panel->setup_sys) {
1098                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1099                         if (ret)
1100                                 return ret;
1101                 }
1102         }
1103
1104         /* Compute frame buffer base address and pitch for each channel. */
1105         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1106                 int pixelformat;
1107                 void *cache;
1108
1109                 ch = &priv->ch[k];
1110                 if (!ch->enabled)
1111                         continue;
1112
1113                 ch->base_addr_y = ch->dma_handle;
1114                 ch->base_addr_c = ch->dma_handle
1115                                 + ch->xres_virtual * ch->yres_virtual;
1116                 ch->line_size = ch->pitch;
1117
1118                 /* Enable MERAM if possible. */
1119                 if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1120                         continue;
1121
1122                 /* Free the allocated MERAM cache. */
1123                 if (ch->cache) {
1124                         sh_mobile_meram_cache_free(mdev, ch->cache);
1125                         ch->cache = NULL;
1126                 }
1127
1128                 switch (ch->format->fourcc) {
1129                 case V4L2_PIX_FMT_NV12:
1130                 case V4L2_PIX_FMT_NV21:
1131                 case V4L2_PIX_FMT_NV16:
1132                 case V4L2_PIX_FMT_NV61:
1133                         pixelformat = SH_MOBILE_MERAM_PF_NV;
1134                         break;
1135                 case V4L2_PIX_FMT_NV24:
1136                 case V4L2_PIX_FMT_NV42:
1137                         pixelformat = SH_MOBILE_MERAM_PF_NV24;
1138                         break;
1139                 case V4L2_PIX_FMT_RGB565:
1140                 case V4L2_PIX_FMT_BGR24:
1141                 case V4L2_PIX_FMT_BGR32:
1142                 default:
1143                         pixelformat = SH_MOBILE_MERAM_PF_RGB;
1144                         break;
1145                 }
1146
1147                 cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1148                                         ch->pitch, ch->yres, pixelformat,
1149                                         &ch->line_size);
1150                 if (!IS_ERR(cache)) {
1151                         sh_mobile_meram_cache_update(mdev, cache,
1152                                         ch->base_addr_y, ch->base_addr_c,
1153                                         &ch->base_addr_y, &ch->base_addr_c);
1154                         ch->cache = cache;
1155                 }
1156         }
1157
1158         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1159                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1160                 sh_mobile_lcdc_overlay_setup(ovl);
1161         }
1162
1163         /* Start the LCDC. */
1164         __sh_mobile_lcdc_start(priv);
1165
1166         /* Setup deferred I/O, tell the board code to enable the panels, and
1167          * turn backlight on.
1168          */
1169         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1170                 ch = &priv->ch[k];
1171                 if (!ch->enabled)
1172                         continue;
1173
1174                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1175                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1176                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1177                         ch->defio.delay = msecs_to_jiffies(tmp);
1178                         ch->info->fbdefio = &ch->defio;
1179                         fb_deferred_io_init(ch->info);
1180                 }
1181
1182                 sh_mobile_lcdc_display_on(ch);
1183
1184                 if (ch->bl) {
1185                         ch->bl->props.power = FB_BLANK_UNBLANK;
1186                         backlight_update_status(ch->bl);
1187                 }
1188         }
1189
1190         return 0;
1191 }
1192
1193 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1194 {
1195         struct sh_mobile_lcdc_chan *ch;
1196         int k;
1197
1198         /* clean up deferred io and ask board code to disable panel */
1199         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1200                 ch = &priv->ch[k];
1201                 if (!ch->enabled)
1202                         continue;
1203
1204                 /* deferred io mode:
1205                  * flush frame, and wait for frame end interrupt
1206                  * clean up deferred io and enable clock
1207                  */
1208                 if (ch->info && ch->info->fbdefio) {
1209                         ch->frame_end = 0;
1210                         schedule_delayed_work(&ch->info->deferred_work, 0);
1211                         wait_event(ch->frame_end_wait, ch->frame_end);
1212                         fb_deferred_io_cleanup(ch->info);
1213                         ch->info->fbdefio = NULL;
1214                         sh_mobile_lcdc_clk_on(priv);
1215                 }
1216
1217                 if (ch->bl) {
1218                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1219                         backlight_update_status(ch->bl);
1220                 }
1221
1222                 sh_mobile_lcdc_display_off(ch);
1223
1224                 /* Free the MERAM cache. */
1225                 if (ch->cache) {
1226                         sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1227                         ch->cache = 0;
1228                 }
1229
1230         }
1231
1232         /* stop the lcdc */
1233         if (priv->started) {
1234                 sh_mobile_lcdc_start_stop(priv, 0);
1235                 priv->started = 0;
1236         }
1237
1238         /* stop clocks */
1239         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1240                 if (priv->ch[k].enabled)
1241                         sh_mobile_lcdc_clk_off(priv);
1242 }
1243
1244 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1245                                       struct fb_info *info)
1246 {
1247         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1248                 return -EINVAL;
1249
1250         /* Make sure the virtual resolution is at least as big as the visible
1251          * resolution.
1252          */
1253         if (var->xres_virtual < var->xres)
1254                 var->xres_virtual = var->xres;
1255         if (var->yres_virtual < var->yres)
1256                 var->yres_virtual = var->yres;
1257
1258         if (sh_mobile_format_is_fourcc(var)) {
1259                 const struct sh_mobile_lcdc_format_info *format;
1260
1261                 format = sh_mobile_format_info(var->grayscale);
1262                 if (format == NULL)
1263                         return -EINVAL;
1264                 var->bits_per_pixel = format->bpp;
1265
1266                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1267                  * respectively.
1268                  */
1269                 if (!format->yuv)
1270                         var->colorspace = V4L2_COLORSPACE_SRGB;
1271                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1272                         var->colorspace = V4L2_COLORSPACE_JPEG;
1273         } else {
1274                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1275                         var->bits_per_pixel = 16;
1276                         var->red.offset = 11;
1277                         var->red.length = 5;
1278                         var->green.offset = 5;
1279                         var->green.length = 6;
1280                         var->blue.offset = 0;
1281                         var->blue.length = 5;
1282                         var->transp.offset = 0;
1283                         var->transp.length = 0;
1284                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1285                         var->bits_per_pixel = 24;
1286                         var->red.offset = 16;
1287                         var->red.length = 8;
1288                         var->green.offset = 8;
1289                         var->green.length = 8;
1290                         var->blue.offset = 0;
1291                         var->blue.length = 8;
1292                         var->transp.offset = 0;
1293                         var->transp.length = 0;
1294                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1295                         var->bits_per_pixel = 32;
1296                         var->red.offset = 16;
1297                         var->red.length = 8;
1298                         var->green.offset = 8;
1299                         var->green.length = 8;
1300                         var->blue.offset = 0;
1301                         var->blue.length = 8;
1302                         var->transp.offset = 24;
1303                         var->transp.length = 8;
1304                 } else
1305                         return -EINVAL;
1306
1307                 var->red.msb_right = 0;
1308                 var->green.msb_right = 0;
1309                 var->blue.msb_right = 0;
1310                 var->transp.msb_right = 0;
1311         }
1312
1313         /* Make sure we don't exceed our allocated memory. */
1314         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1315             info->fix.smem_len)
1316                 return -EINVAL;
1317
1318         return 0;
1319 }
1320
1321 /* -----------------------------------------------------------------------------
1322  * Frame buffer operations - Overlays
1323  */
1324
1325 static ssize_t
1326 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1327 {
1328         struct fb_info *info = dev_get_drvdata(dev);
1329         struct sh_mobile_lcdc_overlay *ovl = info->par;
1330
1331         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1332 }
1333
1334 static ssize_t
1335 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1336                     const char *buf, size_t count)
1337 {
1338         struct fb_info *info = dev_get_drvdata(dev);
1339         struct sh_mobile_lcdc_overlay *ovl = info->par;
1340         unsigned int alpha;
1341         char *endp;
1342
1343         alpha = simple_strtoul(buf, &endp, 10);
1344         if (isspace(*endp))
1345                 endp++;
1346
1347         if (endp - buf != count)
1348                 return -EINVAL;
1349
1350         if (alpha > 255)
1351                 return -EINVAL;
1352
1353         if (ovl->alpha != alpha) {
1354                 ovl->alpha = alpha;
1355
1356                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1357                         sh_mobile_lcdc_overlay_setup(ovl);
1358         }
1359
1360         return count;
1361 }
1362
1363 static ssize_t
1364 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1365 {
1366         struct fb_info *info = dev_get_drvdata(dev);
1367         struct sh_mobile_lcdc_overlay *ovl = info->par;
1368
1369         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1370 }
1371
1372 static ssize_t
1373 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1374                    const char *buf, size_t count)
1375 {
1376         struct fb_info *info = dev_get_drvdata(dev);
1377         struct sh_mobile_lcdc_overlay *ovl = info->par;
1378         unsigned int mode;
1379         char *endp;
1380
1381         mode = simple_strtoul(buf, &endp, 10);
1382         if (isspace(*endp))
1383                 endp++;
1384
1385         if (endp - buf != count)
1386                 return -EINVAL;
1387
1388         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1389                 return -EINVAL;
1390
1391         if (ovl->mode != mode) {
1392                 ovl->mode = mode;
1393
1394                 if (ovl->enabled)
1395                         sh_mobile_lcdc_overlay_setup(ovl);
1396         }
1397
1398         return count;
1399 }
1400
1401 static ssize_t
1402 overlay_position_show(struct device *dev, struct device_attribute *attr,
1403                       char *buf)
1404 {
1405         struct fb_info *info = dev_get_drvdata(dev);
1406         struct sh_mobile_lcdc_overlay *ovl = info->par;
1407
1408         return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1409 }
1410
1411 static ssize_t
1412 overlay_position_store(struct device *dev, struct device_attribute *attr,
1413                        const char *buf, size_t count)
1414 {
1415         struct fb_info *info = dev_get_drvdata(dev);
1416         struct sh_mobile_lcdc_overlay *ovl = info->par;
1417         char *endp;
1418         int pos_x;
1419         int pos_y;
1420
1421         pos_x = simple_strtol(buf, &endp, 10);
1422         if (*endp != ',')
1423                 return -EINVAL;
1424
1425         pos_y = simple_strtol(endp + 1, &endp, 10);
1426         if (isspace(*endp))
1427                 endp++;
1428
1429         if (endp - buf != count)
1430                 return -EINVAL;
1431
1432         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1433                 ovl->pos_x = pos_x;
1434                 ovl->pos_y = pos_y;
1435
1436                 if (ovl->enabled)
1437                         sh_mobile_lcdc_overlay_setup(ovl);
1438         }
1439
1440         return count;
1441 }
1442
1443 static ssize_t
1444 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1445 {
1446         struct fb_info *info = dev_get_drvdata(dev);
1447         struct sh_mobile_lcdc_overlay *ovl = info->par;
1448
1449         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1450 }
1451
1452 static ssize_t
1453 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1454                     const char *buf, size_t count)
1455 {
1456         struct fb_info *info = dev_get_drvdata(dev);
1457         struct sh_mobile_lcdc_overlay *ovl = info->par;
1458         unsigned int rop3;
1459         char *endp;
1460
1461         rop3 = !!simple_strtoul(buf, &endp, 10);
1462         if (isspace(*endp))
1463                 endp++;
1464
1465         if (endp - buf != count)
1466                 return -EINVAL;
1467
1468         if (rop3 > 255)
1469                 return -EINVAL;
1470
1471         if (ovl->rop3 != rop3) {
1472                 ovl->rop3 = rop3;
1473
1474                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1475                         sh_mobile_lcdc_overlay_setup(ovl);
1476         }
1477
1478         return count;
1479 }
1480
1481 static const struct device_attribute overlay_sysfs_attrs[] = {
1482         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1483                overlay_alpha_show, overlay_alpha_store),
1484         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1485                overlay_mode_show, overlay_mode_store),
1486         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1487                overlay_position_show, overlay_position_store),
1488         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1489                overlay_rop3_show, overlay_rop3_store),
1490 };
1491
1492 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1493         .id =           "SH Mobile LCDC",
1494         .type =         FB_TYPE_PACKED_PIXELS,
1495         .visual =       FB_VISUAL_TRUECOLOR,
1496         .accel =        FB_ACCEL_NONE,
1497         .xpanstep =     1,
1498         .ypanstep =     1,
1499         .ywrapstep =    0,
1500         .capabilities = FB_CAP_FOURCC,
1501 };
1502
1503 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1504                                     struct fb_info *info)
1505 {
1506         struct sh_mobile_lcdc_overlay *ovl = info->par;
1507         unsigned long base_addr_y;
1508         unsigned long base_addr_c;
1509         unsigned long y_offset;
1510         unsigned long c_offset;
1511
1512         if (!ovl->format->yuv) {
1513                 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1514                          * ovl->format->bpp / 8;
1515                 c_offset = 0;
1516         } else {
1517                 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1518                 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1519
1520                 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1521                 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1522                          + var->xoffset * 2 / xsub;
1523         }
1524
1525         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1526          * nothing to do in that case.
1527          */
1528         if (y_offset == ovl->pan_y_offset)
1529                 return 0;
1530
1531         /* Set the source address for the next refresh */
1532         base_addr_y = ovl->dma_handle + y_offset;
1533         base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1534                     + c_offset;
1535
1536         ovl->base_addr_y = base_addr_y;
1537         ovl->base_addr_c = base_addr_c;
1538         ovl->pan_y_offset = y_offset;
1539
1540         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1541
1542         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1543         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1544
1545         lcdc_write(ovl->channel->lcdc, LDBCR,
1546                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1547
1548         return 0;
1549 }
1550
1551 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1552                                       unsigned long arg)
1553 {
1554         struct sh_mobile_lcdc_overlay *ovl = info->par;
1555
1556         switch (cmd) {
1557         case FBIO_WAITFORVSYNC:
1558                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1559
1560         default:
1561                 return -ENOIOCTLCMD;
1562         }
1563 }
1564
1565 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1566                                           struct fb_info *info)
1567 {
1568         return __sh_mobile_lcdc_check_var(var, info);
1569 }
1570
1571 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1572 {
1573         struct sh_mobile_lcdc_overlay *ovl = info->par;
1574
1575         ovl->format =
1576                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1577
1578         ovl->xres = info->var.xres;
1579         ovl->xres_virtual = info->var.xres_virtual;
1580         ovl->yres = info->var.yres;
1581         ovl->yres_virtual = info->var.yres_virtual;
1582
1583         if (ovl->format->yuv)
1584                 ovl->pitch = info->var.xres_virtual;
1585         else
1586                 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1587
1588         sh_mobile_lcdc_overlay_setup(ovl);
1589
1590         info->fix.line_length = ovl->pitch;
1591
1592         if (sh_mobile_format_is_fourcc(&info->var)) {
1593                 info->fix.type = FB_TYPE_FOURCC;
1594                 info->fix.visual = FB_VISUAL_FOURCC;
1595         } else {
1596                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1597                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1598         }
1599
1600         return 0;
1601 }
1602
1603 /* Overlay blanking. Disable the overlay when blanked. */
1604 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1605 {
1606         struct sh_mobile_lcdc_overlay *ovl = info->par;
1607
1608         ovl->enabled = !blank;
1609         sh_mobile_lcdc_overlay_setup(ovl);
1610
1611         /* Prevent the backlight from receiving a blanking event by returning
1612          * a non-zero value.
1613          */
1614         return 1;
1615 }
1616
1617 static int
1618 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1619 {
1620         struct sh_mobile_lcdc_overlay *ovl = info->par;
1621
1622         return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1623                                  ovl->dma_handle, ovl->fb_size);
1624 }
1625
1626 static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1627         .owner          = THIS_MODULE,
1628         .fb_read        = fb_sys_read,
1629         .fb_write       = fb_sys_write,
1630         .fb_fillrect    = sys_fillrect,
1631         .fb_copyarea    = sys_copyarea,
1632         .fb_imageblit   = sys_imageblit,
1633         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1634         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1635         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1636         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1637         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1638         .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1639 };
1640
1641 static void
1642 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1643 {
1644         struct fb_info *info = ovl->info;
1645
1646         if (info == NULL || info->dev == NULL)
1647                 return;
1648
1649         unregister_framebuffer(ovl->info);
1650 }
1651
1652 static int
1653 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1654 {
1655         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1656         struct fb_info *info = ovl->info;
1657         unsigned int i;
1658         int ret;
1659
1660         if (info == NULL)
1661                 return 0;
1662
1663         ret = register_framebuffer(info);
1664         if (ret < 0)
1665                 return ret;
1666
1667         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1668                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1669                  info->var.yres, info->var.bits_per_pixel);
1670
1671         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1672                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1673                 if (ret < 0)
1674                         return ret;
1675         }
1676
1677         return 0;
1678 }
1679
1680 static void
1681 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1682 {
1683         struct fb_info *info = ovl->info;
1684
1685         if (info == NULL || info->device == NULL)
1686                 return;
1687
1688         framebuffer_release(info);
1689 }
1690
1691 static int
1692 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1693 {
1694         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1695         struct fb_var_screeninfo *var;
1696         struct fb_info *info;
1697
1698         /* Allocate and initialize the frame buffer device. */
1699         info = framebuffer_alloc(0, priv->dev);
1700         if (info == NULL) {
1701                 dev_err(priv->dev, "unable to allocate fb_info\n");
1702                 return -ENOMEM;
1703         }
1704
1705         ovl->info = info;
1706
1707         info->flags = FBINFO_FLAG_DEFAULT;
1708         info->fbops = &sh_mobile_lcdc_overlay_ops;
1709         info->device = priv->dev;
1710         info->screen_base = ovl->fb_mem;
1711         info->par = ovl;
1712
1713         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1714          * for NV12 and NV21.
1715          */
1716         info->fix = sh_mobile_lcdc_overlay_fix;
1717         snprintf(info->fix.id, sizeof(info->fix.id),
1718                  "SH Mobile LCDC Overlay %u", ovl->index);
1719         info->fix.smem_start = ovl->dma_handle;
1720         info->fix.smem_len = ovl->fb_size;
1721         info->fix.line_length = ovl->pitch;
1722
1723         if (ovl->format->yuv)
1724                 info->fix.visual = FB_VISUAL_FOURCC;
1725         else
1726                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1727
1728         switch (ovl->format->fourcc) {
1729         case V4L2_PIX_FMT_NV12:
1730         case V4L2_PIX_FMT_NV21:
1731                 info->fix.ypanstep = 2;
1732         case V4L2_PIX_FMT_NV16:
1733         case V4L2_PIX_FMT_NV61:
1734                 info->fix.xpanstep = 2;
1735         }
1736
1737         /* Initialize variable screen information. */
1738         var = &info->var;
1739         memset(var, 0, sizeof(*var));
1740         var->xres = ovl->xres;
1741         var->yres = ovl->yres;
1742         var->xres_virtual = ovl->xres_virtual;
1743         var->yres_virtual = ovl->yres_virtual;
1744         var->activate = FB_ACTIVATE_NOW;
1745
1746         /* Use the legacy API by default for RGB formats, and the FOURCC API
1747          * for YUV formats.
1748          */
1749         if (!ovl->format->yuv)
1750                 var->bits_per_pixel = ovl->format->bpp;
1751         else
1752                 var->grayscale = ovl->format->fourcc;
1753
1754         return sh_mobile_lcdc_overlay_check_var(var, info);
1755 }
1756
1757 /* -----------------------------------------------------------------------------
1758  * Frame buffer operations - main frame buffer
1759  */
1760
1761 static int sh_mobile_lcdc_setcolreg(u_int regno,
1762                                     u_int red, u_int green, u_int blue,
1763                                     u_int transp, struct fb_info *info)
1764 {
1765         u32 *palette = info->pseudo_palette;
1766
1767         if (regno >= PALETTE_NR)
1768                 return -EINVAL;
1769
1770         /* only FB_VISUAL_TRUECOLOR supported */
1771
1772         red >>= 16 - info->var.red.length;
1773         green >>= 16 - info->var.green.length;
1774         blue >>= 16 - info->var.blue.length;
1775         transp >>= 16 - info->var.transp.length;
1776
1777         palette[regno] = (red << info->var.red.offset) |
1778           (green << info->var.green.offset) |
1779           (blue << info->var.blue.offset) |
1780           (transp << info->var.transp.offset);
1781
1782         return 0;
1783 }
1784
1785 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1786         .id =           "SH Mobile LCDC",
1787         .type =         FB_TYPE_PACKED_PIXELS,
1788         .visual =       FB_VISUAL_TRUECOLOR,
1789         .accel =        FB_ACCEL_NONE,
1790         .xpanstep =     1,
1791         .ypanstep =     1,
1792         .ywrapstep =    0,
1793         .capabilities = FB_CAP_FOURCC,
1794 };
1795
1796 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1797                                     const struct fb_fillrect *rect)
1798 {
1799         sys_fillrect(info, rect);
1800         sh_mobile_lcdc_deferred_io_touch(info);
1801 }
1802
1803 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1804                                     const struct fb_copyarea *area)
1805 {
1806         sys_copyarea(info, area);
1807         sh_mobile_lcdc_deferred_io_touch(info);
1808 }
1809
1810 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1811                                      const struct fb_image *image)
1812 {
1813         sys_imageblit(info, image);
1814         sh_mobile_lcdc_deferred_io_touch(info);
1815 }
1816
1817 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1818                               struct fb_info *info)
1819 {
1820         struct sh_mobile_lcdc_chan *ch = info->par;
1821         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1822         unsigned long ldrcntr;
1823         unsigned long base_addr_y, base_addr_c;
1824         unsigned long y_offset;
1825         unsigned long c_offset;
1826
1827         if (!ch->format->yuv) {
1828                 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1829                          * ch->format->bpp / 8;
1830                 c_offset = 0;
1831         } else {
1832                 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1833                 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1834
1835                 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1836                 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1837                          + var->xoffset * 2 / xsub;
1838         }
1839
1840         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1841          * nothing to do in that case.
1842          */
1843         if (y_offset == ch->pan_y_offset)
1844                 return 0;
1845
1846         /* Set the source address for the next refresh */
1847         base_addr_y = ch->dma_handle + y_offset;
1848         base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1849                     + c_offset;
1850
1851         if (ch->cache)
1852                 sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1853                                              base_addr_y, base_addr_c,
1854                                              &base_addr_y, &base_addr_c);
1855
1856         ch->base_addr_y = base_addr_y;
1857         ch->base_addr_c = base_addr_c;
1858         ch->pan_y_offset = y_offset;
1859
1860         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1861         if (ch->format->yuv)
1862                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1863
1864         ldrcntr = lcdc_read(priv, _LDRCNTR);
1865         if (lcdc_chan_is_sublcd(ch))
1866                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1867         else
1868                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1869
1870
1871         sh_mobile_lcdc_deferred_io_touch(info);
1872
1873         return 0;
1874 }
1875
1876 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1877                                 unsigned long arg)
1878 {
1879         struct sh_mobile_lcdc_chan *ch = info->par;
1880         int retval;
1881
1882         switch (cmd) {
1883         case FBIO_WAITFORVSYNC:
1884                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1885                 break;
1886
1887         default:
1888                 retval = -ENOIOCTLCMD;
1889                 break;
1890         }
1891         return retval;
1892 }
1893
1894 static void sh_mobile_fb_reconfig(struct fb_info *info)
1895 {
1896         struct sh_mobile_lcdc_chan *ch = info->par;
1897         struct fb_var_screeninfo var;
1898         struct fb_videomode mode;
1899         struct fb_event event;
1900         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1901
1902         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1903                 /* More framebuffer users are active */
1904                 return;
1905
1906         fb_var_to_videomode(&mode, &info->var);
1907
1908         if (fb_mode_is_equal(&ch->display.mode, &mode))
1909                 return;
1910
1911         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1912         var = info->var;
1913         fb_videomode_to_var(&var, &ch->display.mode);
1914         var.width = ch->display.width;
1915         var.height = ch->display.height;
1916         var.activate = FB_ACTIVATE_NOW;
1917
1918         if (fb_set_var(info, &var) < 0)
1919                 /* Couldn't reconfigure, hopefully, can continue as before */
1920                 return;
1921
1922         /*
1923          * fb_set_var() calls the notifier change internally, only if
1924          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1925          * user event, we have to call the chain ourselves.
1926          */
1927         event.info = info;
1928         event.data = &ch->display.mode;
1929         fb_notifier_call_chain(evnt, &event);
1930 }
1931
1932 /*
1933  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1934  * user == 1, or with console sem held, if user == 0.
1935  */
1936 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1937 {
1938         struct sh_mobile_lcdc_chan *ch = info->par;
1939
1940         mutex_lock(&ch->open_lock);
1941         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1942
1943         ch->use_count--;
1944
1945         /* Nothing to reconfigure, when called from fbcon */
1946         if (user) {
1947                 console_lock();
1948                 sh_mobile_fb_reconfig(info);
1949                 console_unlock();
1950         }
1951
1952         mutex_unlock(&ch->open_lock);
1953
1954         return 0;
1955 }
1956
1957 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1958 {
1959         struct sh_mobile_lcdc_chan *ch = info->par;
1960
1961         mutex_lock(&ch->open_lock);
1962         ch->use_count++;
1963
1964         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1965         mutex_unlock(&ch->open_lock);
1966
1967         return 0;
1968 }
1969
1970 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1971                                     struct fb_info *info)
1972 {
1973         struct sh_mobile_lcdc_chan *ch = info->par;
1974         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1975         unsigned int best_dist = (unsigned int)-1;
1976         unsigned int best_xres = 0;
1977         unsigned int best_yres = 0;
1978         unsigned int i;
1979         int ret;
1980
1981         /* If board code provides us with a list of available modes, make sure
1982          * we use one of them. Find the mode closest to the requested one. The
1983          * distance between two modes is defined as the size of the
1984          * non-overlapping parts of the two rectangles.
1985          */
1986         for (i = 0; i < ch->cfg->num_modes; ++i) {
1987                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1988                 unsigned int dist;
1989
1990                 /* We can only round up. */
1991                 if (var->xres > mode->xres || var->yres > mode->yres)
1992                         continue;
1993
1994                 dist = var->xres * var->yres + mode->xres * mode->yres
1995                      - 2 * min(var->xres, mode->xres)
1996                          * min(var->yres, mode->yres);
1997
1998                 if (dist < best_dist) {
1999                         best_xres = mode->xres;
2000                         best_yres = mode->yres;
2001                         best_dist = dist;
2002                 }
2003         }
2004
2005         /* If no available mode can be used, return an error. */
2006         if (ch->cfg->num_modes != 0) {
2007                 if (best_dist == (unsigned int)-1)
2008                         return -EINVAL;
2009
2010                 var->xres = best_xres;
2011                 var->yres = best_yres;
2012         }
2013
2014         ret = __sh_mobile_lcdc_check_var(var, info);
2015         if (ret < 0)
2016                 return ret;
2017
2018         /* only accept the forced_fourcc for dual channel configurations */
2019         if (p->forced_fourcc &&
2020             p->forced_fourcc != sh_mobile_format_fourcc(var))
2021                 return -EINVAL;
2022
2023         return 0;
2024 }
2025
2026 static int sh_mobile_lcdc_set_par(struct fb_info *info)
2027 {
2028         struct sh_mobile_lcdc_chan *ch = info->par;
2029         int ret;
2030
2031         sh_mobile_lcdc_stop(ch->lcdc);
2032
2033         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2034         ch->colorspace = info->var.colorspace;
2035
2036         ch->xres = info->var.xres;
2037         ch->xres_virtual = info->var.xres_virtual;
2038         ch->yres = info->var.yres;
2039         ch->yres_virtual = info->var.yres_virtual;
2040
2041         if (ch->format->yuv)
2042                 ch->pitch = info->var.xres_virtual;
2043         else
2044                 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2045
2046         ret = sh_mobile_lcdc_start(ch->lcdc);
2047         if (ret < 0)
2048                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2049
2050         info->fix.line_length = ch->pitch;
2051
2052         if (sh_mobile_format_is_fourcc(&info->var)) {
2053                 info->fix.type = FB_TYPE_FOURCC;
2054                 info->fix.visual = FB_VISUAL_FOURCC;
2055         } else {
2056                 info->fix.type = FB_TYPE_PACKED_PIXELS;
2057                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2058         }
2059
2060         return ret;
2061 }
2062
2063 /*
2064  * Screen blanking. Behavior is as follows:
2065  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2066  * FB_BLANK_NORMAL: screen blanked, clocks enabled
2067  * FB_BLANK_VSYNC,
2068  * FB_BLANK_HSYNC,
2069  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2070  */
2071 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2072 {
2073         struct sh_mobile_lcdc_chan *ch = info->par;
2074         struct sh_mobile_lcdc_priv *p = ch->lcdc;
2075
2076         /* blank the screen? */
2077         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2078                 struct fb_fillrect rect = {
2079                         .width = ch->xres,
2080                         .height = ch->yres,
2081                 };
2082                 sh_mobile_lcdc_fillrect(info, &rect);
2083         }
2084         /* turn clocks on? */
2085         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2086                 sh_mobile_lcdc_clk_on(p);
2087         }
2088         /* turn clocks off? */
2089         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2090                 /* make sure the screen is updated with the black fill before
2091                  * switching the clocks off. one vsync is not enough since
2092                  * blanking may occur in the middle of a refresh. deferred io
2093                  * mode will reenable the clocks and update the screen in time,
2094                  * so it does not need this. */
2095                 if (!info->fbdefio) {
2096                         sh_mobile_lcdc_wait_for_vsync(ch);
2097                         sh_mobile_lcdc_wait_for_vsync(ch);
2098                 }
2099                 sh_mobile_lcdc_clk_off(p);
2100         }
2101
2102         ch->blank_status = blank;
2103         return 0;
2104 }
2105
2106 static int
2107 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
2108 {
2109         struct sh_mobile_lcdc_chan *ch = info->par;
2110
2111         return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
2112                                  ch->dma_handle, ch->fb_size);
2113 }
2114
2115 static struct fb_ops sh_mobile_lcdc_ops = {
2116         .owner          = THIS_MODULE,
2117         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2118         .fb_read        = fb_sys_read,
2119         .fb_write       = fb_sys_write,
2120         .fb_fillrect    = sh_mobile_lcdc_fillrect,
2121         .fb_copyarea    = sh_mobile_lcdc_copyarea,
2122         .fb_imageblit   = sh_mobile_lcdc_imageblit,
2123         .fb_blank       = sh_mobile_lcdc_blank,
2124         .fb_pan_display = sh_mobile_lcdc_pan,
2125         .fb_ioctl       = sh_mobile_lcdc_ioctl,
2126         .fb_open        = sh_mobile_lcdc_open,
2127         .fb_release     = sh_mobile_lcdc_release,
2128         .fb_check_var   = sh_mobile_lcdc_check_var,
2129         .fb_set_par     = sh_mobile_lcdc_set_par,
2130         .fb_mmap        = sh_mobile_lcdc_mmap,
2131 };
2132
2133 static void
2134 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2135 {
2136         if (ch->info && ch->info->dev)
2137                 unregister_framebuffer(ch->info);
2138 }
2139
2140 static int
2141 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2142 {
2143         struct fb_info *info = ch->info;
2144         int ret;
2145
2146         if (info->fbdefio) {
2147                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2148                                      ch->fb_size >> PAGE_SHIFT);
2149                 if (!ch->sglist) {
2150                         dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2151                         return -ENOMEM;
2152                 }
2153         }
2154
2155         info->bl_dev = ch->bl;
2156
2157         ret = register_framebuffer(info);
2158         if (ret < 0)
2159                 return ret;
2160
2161         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2162                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2163                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2164                  info->var.bits_per_pixel);
2165
2166         /* deferred io mode: disable clock to save power */
2167         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2168                 sh_mobile_lcdc_clk_off(ch->lcdc);
2169
2170         return ret;
2171 }
2172
2173 static void
2174 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2175 {
2176         struct fb_info *info = ch->info;
2177
2178         if (!info || !info->device)
2179                 return;
2180
2181         if (ch->sglist)
2182                 vfree(ch->sglist);
2183
2184         fb_dealloc_cmap(&info->cmap);
2185         framebuffer_release(info);
2186 }
2187
2188 static int
2189 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2190                                const struct fb_videomode *modes,
2191                                unsigned int num_modes)
2192 {
2193         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2194         struct fb_var_screeninfo *var;
2195         struct fb_info *info;
2196         int ret;
2197
2198         /* Allocate and initialize the frame buffer device. Create the modes
2199          * list and allocate the color map.
2200          */
2201         info = framebuffer_alloc(0, priv->dev);
2202         if (info == NULL) {
2203                 dev_err(priv->dev, "unable to allocate fb_info\n");
2204                 return -ENOMEM;
2205         }
2206
2207         ch->info = info;
2208
2209         info->flags = FBINFO_FLAG_DEFAULT;
2210         info->fbops = &sh_mobile_lcdc_ops;
2211         info->device = priv->dev;
2212         info->screen_base = ch->fb_mem;
2213         info->pseudo_palette = &ch->pseudo_palette;
2214         info->par = ch;
2215
2216         fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2217
2218         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2219         if (ret < 0) {
2220                 dev_err(priv->dev, "unable to allocate cmap\n");
2221                 return ret;
2222         }
2223
2224         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2225          * for NV12 and NV21.
2226          */
2227         info->fix = sh_mobile_lcdc_fix;
2228         info->fix.smem_start = ch->dma_handle;
2229         info->fix.smem_len = ch->fb_size;
2230         info->fix.line_length = ch->pitch;
2231
2232         if (ch->format->yuv)
2233                 info->fix.visual = FB_VISUAL_FOURCC;
2234         else
2235                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2236
2237         switch (ch->format->fourcc) {
2238         case V4L2_PIX_FMT_NV12:
2239         case V4L2_PIX_FMT_NV21:
2240                 info->fix.ypanstep = 2;
2241         case V4L2_PIX_FMT_NV16:
2242         case V4L2_PIX_FMT_NV61:
2243                 info->fix.xpanstep = 2;
2244         }
2245
2246         /* Initialize variable screen information using the first mode as
2247          * default.
2248          */
2249         var = &info->var;
2250         fb_videomode_to_var(var, modes);
2251         var->width = ch->display.width;
2252         var->height = ch->display.height;
2253         var->xres_virtual = ch->xres_virtual;
2254         var->yres_virtual = ch->yres_virtual;
2255         var->activate = FB_ACTIVATE_NOW;
2256
2257         /* Use the legacy API by default for RGB formats, and the FOURCC API
2258          * for YUV formats.
2259          */
2260         if (!ch->format->yuv)
2261                 var->bits_per_pixel = ch->format->bpp;
2262         else
2263                 var->grayscale = ch->format->fourcc;
2264
2265         ret = sh_mobile_lcdc_check_var(var, info);
2266         if (ret)
2267                 return ret;
2268
2269         return 0;
2270 }
2271
2272 /* -----------------------------------------------------------------------------
2273  * Backlight
2274  */
2275
2276 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2277 {
2278         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2279         int brightness = bdev->props.brightness;
2280
2281         if (bdev->props.power != FB_BLANK_UNBLANK ||
2282             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2283                 brightness = 0;
2284
2285         ch->bl_brightness = brightness;
2286         return ch->cfg->bl_info.set_brightness(brightness);
2287 }
2288
2289 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2290 {
2291         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2292
2293         return ch->bl_brightness;
2294 }
2295
2296 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2297                                    struct fb_info *info)
2298 {
2299         return (info->bl_dev == bdev);
2300 }
2301
2302 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2303         .options        = BL_CORE_SUSPENDRESUME,
2304         .update_status  = sh_mobile_lcdc_update_bl,
2305         .get_brightness = sh_mobile_lcdc_get_brightness,
2306         .check_fb       = sh_mobile_lcdc_check_fb,
2307 };
2308
2309 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2310                                                struct sh_mobile_lcdc_chan *ch)
2311 {
2312         struct backlight_device *bl;
2313
2314         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2315                                        &sh_mobile_lcdc_bl_ops, NULL);
2316         if (IS_ERR(bl)) {
2317                 dev_err(parent, "unable to register backlight device: %ld\n",
2318                         PTR_ERR(bl));
2319                 return NULL;
2320         }
2321
2322         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2323         bl->props.brightness = bl->props.max_brightness;
2324         backlight_update_status(bl);
2325
2326         return bl;
2327 }
2328
2329 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2330 {
2331         backlight_device_unregister(bdev);
2332 }
2333
2334 /* -----------------------------------------------------------------------------
2335  * Power management
2336  */
2337
2338 static int sh_mobile_lcdc_suspend(struct device *dev)
2339 {
2340         struct platform_device *pdev = to_platform_device(dev);
2341
2342         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2343         return 0;
2344 }
2345
2346 static int sh_mobile_lcdc_resume(struct device *dev)
2347 {
2348         struct platform_device *pdev = to_platform_device(dev);
2349
2350         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2351 }
2352
2353 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2354 {
2355         struct platform_device *pdev = to_platform_device(dev);
2356         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2357
2358         /* turn off LCDC hardware */
2359         lcdc_write(priv, _LDCNT1R, 0);
2360
2361         return 0;
2362 }
2363
2364 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2365 {
2366         struct platform_device *pdev = to_platform_device(dev);
2367         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2368
2369         __sh_mobile_lcdc_start(priv);
2370
2371         return 0;
2372 }
2373
2374 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2375         .suspend = sh_mobile_lcdc_suspend,
2376         .resume = sh_mobile_lcdc_resume,
2377         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2378         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2379 };
2380
2381 /* -----------------------------------------------------------------------------
2382  * Framebuffer notifier
2383  */
2384
2385 /* locking: called with info->lock held */
2386 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2387                                  unsigned long action, void *data)
2388 {
2389         struct fb_event *event = data;
2390         struct fb_info *info = event->info;
2391         struct sh_mobile_lcdc_chan *ch = info->par;
2392
2393         if (&ch->lcdc->notifier != nb)
2394                 return NOTIFY_DONE;
2395
2396         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2397                 __func__, action, event->data);
2398
2399         switch(action) {
2400         case FB_EVENT_SUSPEND:
2401                 sh_mobile_lcdc_display_off(ch);
2402                 sh_mobile_lcdc_stop(ch->lcdc);
2403                 break;
2404         case FB_EVENT_RESUME:
2405                 mutex_lock(&ch->open_lock);
2406                 sh_mobile_fb_reconfig(info);
2407                 mutex_unlock(&ch->open_lock);
2408
2409                 sh_mobile_lcdc_display_on(ch);
2410                 sh_mobile_lcdc_start(ch->lcdc);
2411         }
2412
2413         return NOTIFY_OK;
2414 }
2415
2416 /* -----------------------------------------------------------------------------
2417  * Probe/remove and driver init/exit
2418  */
2419
2420 static const struct fb_videomode default_720p = {
2421         .name = "HDMI 720p",
2422         .xres = 1280,
2423         .yres = 720,
2424
2425         .left_margin = 220,
2426         .right_margin = 110,
2427         .hsync_len = 40,
2428
2429         .upper_margin = 20,
2430         .lower_margin = 5,
2431         .vsync_len = 5,
2432
2433         .pixclock = 13468,
2434         .refresh = 60,
2435         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2436 };
2437
2438 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2439 {
2440         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2441         unsigned int i;
2442
2443         fb_unregister_client(&priv->notifier);
2444
2445         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2446                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2447         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2448                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2449
2450         sh_mobile_lcdc_stop(priv);
2451
2452         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2453                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2454
2455                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2456
2457                 if (ovl->fb_mem)
2458                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2459                                           ovl->fb_mem, ovl->dma_handle);
2460         }
2461
2462         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2463                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2464
2465                 if (ch->tx_dev) {
2466                         ch->tx_dev->lcdc = NULL;
2467                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2468                 }
2469
2470                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2471
2472                 if (ch->fb_mem)
2473                         dma_free_coherent(&pdev->dev, ch->fb_size,
2474                                           ch->fb_mem, ch->dma_handle);
2475         }
2476
2477         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2478                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2479
2480                 if (ch->bl)
2481                         sh_mobile_lcdc_bl_remove(ch->bl);
2482                 mutex_destroy(&ch->open_lock);
2483         }
2484
2485         if (priv->dot_clk) {
2486                 pm_runtime_disable(&pdev->dev);
2487                 clk_put(priv->dot_clk);
2488         }
2489
2490         if (priv->base)
2491                 iounmap(priv->base);
2492
2493         if (priv->irq)
2494                 free_irq(priv->irq, priv);
2495         kfree(priv);
2496         return 0;
2497 }
2498
2499 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2500 {
2501         int interface_type = ch->cfg->interface_type;
2502
2503         switch (interface_type) {
2504         case RGB8:
2505         case RGB9:
2506         case RGB12A:
2507         case RGB12B:
2508         case RGB16:
2509         case RGB18:
2510         case RGB24:
2511         case SYS8A:
2512         case SYS8B:
2513         case SYS8C:
2514         case SYS8D:
2515         case SYS9:
2516         case SYS12:
2517         case SYS16A:
2518         case SYS16B:
2519         case SYS16C:
2520         case SYS18:
2521         case SYS24:
2522                 break;
2523         default:
2524                 return -EINVAL;
2525         }
2526
2527         /* SUBLCD only supports SYS interface */
2528         if (lcdc_chan_is_sublcd(ch)) {
2529                 if (!(interface_type & LDMT1R_IFM))
2530                         return -EINVAL;
2531
2532                 interface_type &= ~LDMT1R_IFM;
2533         }
2534
2535         ch->ldmt1r_value = interface_type;
2536         return 0;
2537 }
2538
2539 static int
2540 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2541 {
2542         const struct sh_mobile_lcdc_format_info *format;
2543         struct device *dev = ovl->channel->lcdc->dev;
2544         int ret;
2545
2546         if (ovl->cfg->fourcc == 0)
2547                 return 0;
2548
2549         /* Validate the format. */
2550         format = sh_mobile_format_info(ovl->cfg->fourcc);
2551         if (format == NULL) {
2552                 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2553                 return -EINVAL;
2554         }
2555
2556         ovl->enabled = false;
2557         ovl->mode = LCDC_OVERLAY_BLEND;
2558         ovl->alpha = 255;
2559         ovl->rop3 = 0;
2560         ovl->pos_x = 0;
2561         ovl->pos_y = 0;
2562
2563         /* The default Y virtual resolution is twice the panel size to allow for
2564          * double-buffering.
2565          */
2566         ovl->format = format;
2567         ovl->xres = ovl->cfg->max_xres;
2568         ovl->xres_virtual = ovl->xres;
2569         ovl->yres = ovl->cfg->max_yres;
2570         ovl->yres_virtual = ovl->yres * 2;
2571
2572         if (!format->yuv)
2573                 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2574         else
2575                 ovl->pitch = ovl->xres_virtual;
2576
2577         /* Allocate frame buffer memory. */
2578         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2579                        * format->bpp / 8 * 2;
2580         ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2581                                          GFP_KERNEL);
2582         if (!ovl->fb_mem) {
2583                 dev_err(dev, "unable to allocate buffer\n");
2584                 return -ENOMEM;
2585         }
2586
2587         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2588         if (ret < 0)
2589                 return ret;
2590
2591         return 0;
2592 }
2593
2594 static int
2595 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2596 {
2597         const struct sh_mobile_lcdc_format_info *format;
2598         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2599         struct device *dev = ch->lcdc->dev;
2600         const struct fb_videomode *max_mode;
2601         const struct fb_videomode *mode;
2602         unsigned int num_modes;
2603         unsigned int max_size;
2604         unsigned int i;
2605
2606         mutex_init(&ch->open_lock);
2607         ch->notify = sh_mobile_lcdc_display_notify;
2608
2609         /* Validate the format. */
2610         format = sh_mobile_format_info(cfg->fourcc);
2611         if (format == NULL) {
2612                 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2613                 return -EINVAL;
2614         }
2615
2616         /* Iterate through the modes to validate them and find the highest
2617          * resolution.
2618          */
2619         max_mode = NULL;
2620         max_size = 0;
2621
2622         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2623                 unsigned int size = mode->yres * mode->xres;
2624
2625                 /* NV12/NV21 buffers must have even number of lines */
2626                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2627                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2628                         dev_err(dev, "yres must be multiple of 2 for "
2629                                 "YCbCr420 mode.\n");
2630                         return -EINVAL;
2631                 }
2632
2633                 if (size > max_size) {
2634                         max_mode = mode;
2635                         max_size = size;
2636                 }
2637         }
2638
2639         if (!max_size)
2640                 max_size = MAX_XRES * MAX_YRES;
2641         else
2642                 dev_dbg(dev, "Found largest videomode %ux%u\n",
2643                         max_mode->xres, max_mode->yres);
2644
2645         if (cfg->lcd_modes == NULL) {
2646                 mode = &default_720p;
2647                 num_modes = 1;
2648         } else {
2649                 mode = cfg->lcd_modes;
2650                 num_modes = cfg->num_modes;
2651         }
2652
2653         /* Use the first mode as default. The default Y virtual resolution is
2654          * twice the panel size to allow for double-buffering.
2655          */
2656         ch->format = format;
2657         ch->xres = mode->xres;
2658         ch->xres_virtual = mode->xres;
2659         ch->yres = mode->yres;
2660         ch->yres_virtual = mode->yres * 2;
2661
2662         if (!format->yuv) {
2663                 ch->colorspace = V4L2_COLORSPACE_SRGB;
2664                 ch->pitch = ch->xres_virtual * format->bpp / 8;
2665         } else {
2666                 ch->colorspace = V4L2_COLORSPACE_REC709;
2667                 ch->pitch = ch->xres_virtual;
2668         }
2669
2670         ch->display.width = cfg->panel_cfg.width;
2671         ch->display.height = cfg->panel_cfg.height;
2672         ch->display.mode = *mode;
2673
2674         /* Allocate frame buffer memory. */
2675         ch->fb_size = max_size * format->bpp / 8 * 2;
2676         ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2677                                         GFP_KERNEL);
2678         if (ch->fb_mem == NULL) {
2679                 dev_err(dev, "unable to allocate buffer\n");
2680                 return -ENOMEM;
2681         }
2682
2683         /* Initialize the transmitter device if present. */
2684         if (cfg->tx_dev) {
2685                 if (!cfg->tx_dev->dev.driver ||
2686                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2687                         dev_warn(dev, "unable to get transmitter device\n");
2688                         return -EINVAL;
2689                 }
2690                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2691                 ch->tx_dev->lcdc = ch;
2692                 ch->tx_dev->def_mode = *mode;
2693         }
2694
2695         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2696 }
2697
2698 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2699 {
2700         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2701         struct sh_mobile_lcdc_priv *priv;
2702         struct resource *res;
2703         int num_channels;
2704         int error;
2705         int i;
2706
2707         if (!pdata) {
2708                 dev_err(&pdev->dev, "no platform data defined\n");
2709                 return -EINVAL;
2710         }
2711
2712         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2713         i = platform_get_irq(pdev, 0);
2714         if (!res || i < 0) {
2715                 dev_err(&pdev->dev, "cannot get platform resources\n");
2716                 return -ENOENT;
2717         }
2718
2719         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2720         if (!priv) {
2721                 dev_err(&pdev->dev, "cannot allocate device data\n");
2722                 return -ENOMEM;
2723         }
2724
2725         priv->dev = &pdev->dev;
2726         priv->meram_dev = pdata->meram_dev;
2727         platform_set_drvdata(pdev, priv);
2728
2729         error = request_irq(i, sh_mobile_lcdc_irq, 0,
2730                             dev_name(&pdev->dev), priv);
2731         if (error) {
2732                 dev_err(&pdev->dev, "unable to request irq\n");
2733                 goto err1;
2734         }
2735
2736         priv->irq = i;
2737         atomic_set(&priv->hw_usecnt, -1);
2738
2739         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2740                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2741
2742                 ch->lcdc = priv;
2743                 ch->cfg = &pdata->ch[i];
2744
2745                 error = sh_mobile_lcdc_check_interface(ch);
2746                 if (error) {
2747                         dev_err(&pdev->dev, "unsupported interface type\n");
2748                         goto err1;
2749                 }
2750                 init_waitqueue_head(&ch->frame_end_wait);
2751                 init_completion(&ch->vsync_completion);
2752
2753                 /* probe the backlight is there is one defined */
2754                 if (ch->cfg->bl_info.max_brightness)
2755                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2756
2757                 switch (pdata->ch[i].chan) {
2758                 case LCDC_CHAN_MAINLCD:
2759                         ch->enabled = LDCNT2R_ME;
2760                         ch->reg_offs = lcdc_offs_mainlcd;
2761                         num_channels++;
2762                         break;
2763                 case LCDC_CHAN_SUBLCD:
2764                         ch->enabled = LDCNT2R_SE;
2765                         ch->reg_offs = lcdc_offs_sublcd;
2766                         num_channels++;
2767                         break;
2768                 }
2769         }
2770
2771         if (!num_channels) {
2772                 dev_err(&pdev->dev, "no channels defined\n");
2773                 error = -EINVAL;
2774                 goto err1;
2775         }
2776
2777         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2778         if (num_channels == 2)
2779                 priv->forced_fourcc = pdata->ch[0].fourcc;
2780
2781         priv->base = ioremap_nocache(res->start, resource_size(res));
2782         if (!priv->base)
2783                 goto err1;
2784
2785         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2786         if (error) {
2787                 dev_err(&pdev->dev, "unable to setup clocks\n");
2788                 goto err1;
2789         }
2790
2791         /* Enable runtime PM. */
2792         pm_runtime_enable(&pdev->dev);
2793
2794         for (i = 0; i < num_channels; i++) {
2795                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2796
2797                 error = sh_mobile_lcdc_channel_init(ch);
2798                 if (error)
2799                         goto err1;
2800         }
2801
2802         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2803                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2804
2805                 ovl->cfg = &pdata->overlays[i];
2806                 ovl->channel = &priv->ch[0];
2807
2808                 error = sh_mobile_lcdc_overlay_init(ovl);
2809                 if (error)
2810                         goto err1;
2811         }
2812
2813         error = sh_mobile_lcdc_start(priv);
2814         if (error) {
2815                 dev_err(&pdev->dev, "unable to start hardware\n");
2816                 goto err1;
2817         }
2818
2819         for (i = 0; i < num_channels; i++) {
2820                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2821
2822                 error = sh_mobile_lcdc_channel_fb_register(ch);
2823                 if (error)
2824                         goto err1;
2825         }
2826
2827         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2828                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2829
2830                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2831                 if (error)
2832                         goto err1;
2833         }
2834
2835         /* Failure ignored */
2836         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2837         fb_register_client(&priv->notifier);
2838
2839         return 0;
2840 err1:
2841         sh_mobile_lcdc_remove(pdev);
2842
2843         return error;
2844 }
2845
2846 static struct platform_driver sh_mobile_lcdc_driver = {
2847         .driver         = {
2848                 .name           = "sh_mobile_lcdc_fb",
2849                 .owner          = THIS_MODULE,
2850                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2851         },
2852         .probe          = sh_mobile_lcdc_probe,
2853         .remove         = sh_mobile_lcdc_remove,
2854 };
2855
2856 module_platform_driver(sh_mobile_lcdc_driver);
2857
2858 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2859 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2860 MODULE_LICENSE("GPL v2");