drivers/video/fbdev/sh_mobile_lcdcfb.c

   1 /*
   2  * SuperH Mobile LCDC Framebuffer
   3  *
   4  * Copyright (c) 2008 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/atomic.h>
  12 #include <linux/backlight.h>
  13 #include <linux/clk.h>
  14 #include <linux/console.h>
  15 #include <linux/ctype.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/delay.h>
  18 #include <linux/fbcon.h>
  19 #include <linux/gpio.h>
  20 #include <linux/init.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/ioctl.h>
  23 #include <linux/kernel.h>
  24 #include <linux/mm.h>
  25 #include <linux/module.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/pm_runtime.h>
  28 #include <linux/slab.h>
  29 #include <linux/videodev2.h>
  30 #include <linux/vmalloc.h>
  31
  32 #include <video/sh_mobile_lcdc.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         int started;
 218         int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 219 };
 220
 221 /* -----------------------------------------------------------------------------
 222  * Registers access
 223  */
 224
 225 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
 226         [LDDCKPAT1R] = 0x400,
 227         [LDDCKPAT2R] = 0x404,
 228         [LDMT1R] = 0x418,
 229         [LDMT2R] = 0x41c,
 230         [LDMT3R] = 0x420,
 231         [LDDFR] = 0x424,
 232         [LDSM1R] = 0x428,
 233         [LDSM2R] = 0x42c,
 234         [LDSA1R] = 0x430,
 235         [LDSA2R] = 0x434,
 236         [LDMLSR] = 0x438,
 237         [LDHCNR] = 0x448,
 238         [LDHSYNR] = 0x44c,
 239         [LDVLNR] = 0x450,
 240         [LDVSYNR] = 0x454,
 241         [LDPMR] = 0x460,
 242         [LDHAJR] = 0x4a0,
 243 };
 244
 245 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 246         [LDDCKPAT1R] = 0x408,
 247         [LDDCKPAT2R] = 0x40c,
 248         [LDMT1R] = 0x600,
 249         [LDMT2R] = 0x604,
 250         [LDMT3R] = 0x608,
 251         [LDDFR] = 0x60c,
 252         [LDSM1R] = 0x610,
 253         [LDSM2R] = 0x614,
 254         [LDSA1R] = 0x618,
 255         [LDMLSR] = 0x620,
 256         [LDHCNR] = 0x624,
 257         [LDHSYNR] = 0x628,
 258         [LDVLNR] = 0x62c,
 259         [LDVSYNR] = 0x630,
 260         [LDPMR] = 0x63c,
 261 };
 262
 263 static bool banked(int reg_nr)
 264 {
 265         switch (reg_nr) {
 266         case LDMT1R:
 267         case LDMT2R:
 268         case LDMT3R:
 269         case LDDFR:
 270         case LDSM1R:
 271         case LDSA1R:
 272         case LDSA2R:
 273         case LDMLSR:
 274         case LDHCNR:
 275         case LDHSYNR:
 276         case LDVLNR:
 277         case LDVSYNR:
 278                 return true;
 279         }
 280         return false;
 281 }
 282
 283 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 284 {
 285         return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 286 }
 287
 288 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 289                             int reg_nr, unsigned long data)
 290 {
 291         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 292         if (banked(reg_nr))
 293                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 294                           SIDE_B_OFFSET);
 295 }
 296
 297 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 298                             int reg_nr, unsigned long data)
 299 {
 300         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 301                   MIRROR_OFFSET);
 302 }
 303
 304 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 305                                     int reg_nr)
 306 {
 307         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 308 }
 309
 310 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
 311                                int reg, unsigned long data)
 312 {
 313         iowrite32(data, ovl->channel->lcdc->base + reg);
 314         iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
 315 }
 316
 317 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 318                        unsigned long reg_offs, unsigned long data)
 319 {
 320         iowrite32(data, priv->base + reg_offs);
 321 }
 322
 323 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 324                                unsigned long reg_offs)
 325 {
 326         return ioread32(priv->base + reg_offs);
 327 }
 328
 329 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 330                           unsigned long reg_offs,
 331                           unsigned long mask, unsigned long until)
 332 {
 333         while ((lcdc_read(priv, reg_offs) & mask) != until)
 334                 cpu_relax();
 335 }
 336
 337 /* -----------------------------------------------------------------------------
 338  * Clock management
 339  */
 340
 341 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 342 {
 343         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 344                 if (priv->dot_clk)
 345                         clk_prepare_enable(priv->dot_clk);
 346                 pm_runtime_get_sync(priv->dev);
 347         }
 348 }
 349
 350 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 351 {
 352         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 353                 pm_runtime_put(priv->dev);
 354                 if (priv->dot_clk)
 355                         clk_disable_unprepare(priv->dot_clk);
 356         }
 357 }
 358
 359 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 360                                        int clock_source)
 361 {
 362         struct clk *clk;
 363         char *str;
 364
 365         switch (clock_source) {
 366         case LCDC_CLK_BUS:
 367                 str = "bus_clk";
 368                 priv->lddckr = LDDCKR_ICKSEL_BUS;
 369                 break;
 370         case LCDC_CLK_PERIPHERAL:
 371                 str = "peripheral_clk";
 372                 priv->lddckr = LDDCKR_ICKSEL_MIPI;
 373                 break;
 374         case LCDC_CLK_EXTERNAL:
 375                 str = NULL;
 376                 priv->lddckr = LDDCKR_ICKSEL_HDMI;
 377                 break;
 378         default:
 379                 return -EINVAL;
 380         }
 381
 382         if (str == NULL)
 383                 return 0;
 384
 385         clk = clk_get(priv->dev, str);
 386         if (IS_ERR(clk)) {
 387                 dev_err(priv->dev, "cannot get dot clock %s\n", str);
 388                 return PTR_ERR(clk);
 389         }
 390
 391         priv->dot_clk = clk;
 392         return 0;
 393 }
 394
 395 /* -----------------------------------------------------------------------------
 396  * Display, panel and deferred I/O
 397  */
 398
 399 static void lcdc_sys_write_index(void *handle, unsigned long data)
 400 {
 401         struct sh_mobile_lcdc_chan *ch = handle;
 402
 403         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 404         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 405         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 406                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 407         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 408 }
 409
 410 static void lcdc_sys_write_data(void *handle, unsigned long data)
 411 {
 412         struct sh_mobile_lcdc_chan *ch = handle;
 413
 414         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 415         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 416         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 417                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 418         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 419 }
 420
 421 static unsigned long lcdc_sys_read_data(void *handle)
 422 {
 423         struct sh_mobile_lcdc_chan *ch = handle;
 424
 425         lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 426         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 427         lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 428                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 429         udelay(1);
 430         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 431
 432         return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 433 }
 434
 435 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 436         .write_index    = lcdc_sys_write_index,
 437         .write_data     = lcdc_sys_write_data,
 438         .read_data      = lcdc_sys_read_data,
 439 };
 440
 441 static int sh_mobile_lcdc_sginit(struct fb_info *info,
 442                                   struct list_head *pagelist)
 443 {
 444         struct sh_mobile_lcdc_chan *ch = info->par;
 445         unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 446         struct page *page;
 447         int nr_pages = 0;
 448
 449         sg_init_table(ch->sglist, nr_pages_max);
 450
 451         list_for_each_entry(page, pagelist, lru)
 452                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 453
 454         return nr_pages;
 455 }
 456
 457 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 458                                        struct list_head *pagelist)
 459 {
 460         struct sh_mobile_lcdc_chan *ch = info->par;
 461         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 462
 463         /* enable clocks before accessing hardware */
 464         sh_mobile_lcdc_clk_on(ch->lcdc);
 465
 466         /*
 467          * It's possible to get here without anything on the pagelist via
 468          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 469          * invocation. In the former case, the acceleration routines are
 470          * stepped in to when using the framebuffer console causing the
 471          * workqueue to be scheduled without any dirty pages on the list.
 472          *
 473          * Despite this, a panel update is still needed given that the
 474          * acceleration routines have their own methods for writing in
 475          * that still need to be updated.
 476          *
 477          * The fsync() and empty pagelist case could be optimized for,
 478          * but we don't bother, as any application exhibiting such
 479          * behaviour is fundamentally broken anyways.
 480          */
 481         if (!list_empty(pagelist)) {
 482                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 483
 484                 /* trigger panel update */
 485                 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 486                 if (panel->start_transfer)
 487                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 488                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 489                 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 490                              DMA_TO_DEVICE);
 491         } else {
 492                 if (panel->start_transfer)
 493                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 494                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 495         }
 496 }
 497
 498 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 499 {
 500         struct fb_deferred_io *fbdefio = info->fbdefio;
 501
 502         if (fbdefio)
 503                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 504 }
 505
 506 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 507 {
 508         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 509
 510         if (ch->tx_dev) {
 511                 int ret;
 512
 513                 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 514                 if (ret < 0)
 515                         return;
 516
 517                 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 518                         ch->info->state = FBINFO_STATE_SUSPENDED;
 519         }
 520
 521         /* HDMI must be enabled before LCDC configuration */
 522         if (panel->display_on)
 523                 panel->display_on();
 524 }
 525
 526 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 527 {
 528         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 529
 530         if (panel->display_off)
 531                 panel->display_off();
 532
 533         if (ch->tx_dev)
 534                 ch->tx_dev->ops->display_off(ch->tx_dev);
 535 }
 536
 537 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 538                                     struct fb_info *info);
 539
 540 /* -----------------------------------------------------------------------------
 541  * Format helpers
 542  */
 543
 544 struct sh_mobile_lcdc_format_info {
 545         u32 fourcc;
 546         unsigned int bpp;
 547         bool yuv;
 548         u32 lddfr;
 549 };
 550
 551 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 552         {
 553                 .fourcc = V4L2_PIX_FMT_RGB565,
 554                 .bpp = 16,
 555                 .yuv = false,
 556                 .lddfr = LDDFR_PKF_RGB16,
 557         }, {
 558                 .fourcc = V4L2_PIX_FMT_BGR24,
 559                 .bpp = 24,
 560                 .yuv = false,
 561                 .lddfr = LDDFR_PKF_RGB24,
 562         }, {
 563                 .fourcc = V4L2_PIX_FMT_BGR32,
 564                 .bpp = 32,
 565                 .yuv = false,
 566                 .lddfr = LDDFR_PKF_ARGB32,
 567         }, {
 568                 .fourcc = V4L2_PIX_FMT_NV12,
 569                 .bpp = 12,
 570                 .yuv = true,
 571                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 572         }, {
 573                 .fourcc = V4L2_PIX_FMT_NV21,
 574                 .bpp = 12,
 575                 .yuv = true,
 576                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 577         }, {
 578                 .fourcc = V4L2_PIX_FMT_NV16,
 579                 .bpp = 16,
 580                 .yuv = true,
 581                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 582         }, {
 583                 .fourcc = V4L2_PIX_FMT_NV61,
 584                 .bpp = 16,
 585                 .yuv = true,
 586                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 587         }, {
 588                 .fourcc = V4L2_PIX_FMT_NV24,
 589                 .bpp = 24,
 590                 .yuv = true,
 591                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 592         }, {
 593                 .fourcc = V4L2_PIX_FMT_NV42,
 594                 .bpp = 24,
 595                 .yuv = true,
 596                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 597         },
 598 };
 599
 600 static const struct sh_mobile_lcdc_format_info *
 601 sh_mobile_format_info(u32 fourcc)
 602 {
 603         unsigned int i;
 604
 605         for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 606                 if (sh_mobile_format_infos[i].fourcc == fourcc)
 607                         return &sh_mobile_format_infos[i];
 608         }
 609
 610         return NULL;
 611 }
 612
 613 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 614 {
 615         if (var->grayscale > 1)
 616                 return var->grayscale;
 617
 618         switch (var->bits_per_pixel) {
 619         case 16:
 620                 return V4L2_PIX_FMT_RGB565;
 621         case 24:
 622                 return V4L2_PIX_FMT_BGR24;
 623         case 32:
 624                 return V4L2_PIX_FMT_BGR32;
 625         default:
 626                 return 0;
 627         }
 628 }
 629
 630 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 631 {
 632         return var->grayscale > 1;
 633 }
 634
 635 /* -----------------------------------------------------------------------------
 636  * Start, stop and IRQ
 637  */
 638
 639 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 640 {
 641         struct sh_mobile_lcdc_priv *priv = data;
 642         struct sh_mobile_lcdc_chan *ch;
 643         unsigned long ldintr;
 644         int is_sub;
 645         int k;
 646
 647         /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 648         ldintr = lcdc_read(priv, _LDINTR);
 649         lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 650
 651         /* figure out if this interrupt is for main or sub lcd */
 652         is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 653
 654         /* wake up channel and disable clocks */
 655         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 656                 ch = &priv->ch[k];
 657
 658                 if (!ch->enabled)
 659                         continue;
 660
 661                 /* Frame End */
 662                 if (ldintr & LDINTR_FS) {
 663                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 664                                 ch->frame_end = 1;
 665                                 wake_up(&ch->frame_end_wait);
 666
 667                                 sh_mobile_lcdc_clk_off(priv);
 668                         }
 669                 }
 670
 671                 /* VSYNC End */
 672                 if (ldintr & LDINTR_VES)
 673                         complete(&ch->vsync_completion);
 674         }
 675
 676         return IRQ_HANDLED;
 677 }
 678
 679 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 680 {
 681         unsigned long ldintr;
 682         int ret;
 683
 684         /* Enable VSync End interrupt and be careful not to acknowledge any
 685          * pending interrupt.
 686          */
 687         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 688         ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 689         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 690
 691         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 692                                                         msecs_to_jiffies(100));
 693         if (!ret)
 694                 return -ETIMEDOUT;
 695
 696         return 0;
 697 }
 698
 699 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 700                                       int start)
 701 {
 702         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 703         int k;
 704
 705         /* start or stop the lcdc */
 706         if (start)
 707                 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 708         else
 709                 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 710
 711         /* wait until power is applied/stopped on all channels */
 712         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 713                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 714                         while (1) {
 715                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 716                                     & LDPMR_LPS;
 717                                 if (start && tmp == LDPMR_LPS)
 718                                         break;
 719                                 if (!start && tmp == 0)
 720                                         break;
 721                                 cpu_relax();
 722                         }
 723
 724         if (!start)
 725                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 726 }
 727
 728 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 729 {
 730         const struct fb_var_screeninfo *var = &ch->info->var;
 731         const struct fb_videomode *mode = &ch->display.mode;
 732         unsigned long h_total, hsync_pos, display_h_total;
 733         u32 tmp;
 734
 735         tmp = ch->ldmt1r_value;
 736         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 737         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 738         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 739         tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 740         tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 741         tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 742         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 743         lcdc_write_chan(ch, LDMT1R, tmp);
 744
 745         /* setup SYS bus */
 746         lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 747         lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 748
 749         /* horizontal configuration */
 750         h_total = mode->xres + mode->hsync_len + mode->left_margin
 751                 + mode->right_margin;
 752         tmp = h_total / 8; /* HTCN */
 753         tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 754         lcdc_write_chan(ch, LDHCNR, tmp);
 755
 756         hsync_pos = mode->xres + mode->right_margin;
 757         tmp = hsync_pos / 8; /* HSYNP */
 758         tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 759         lcdc_write_chan(ch, LDHSYNR, tmp);
 760
 761         /* vertical configuration */
 762         tmp = mode->yres + mode->vsync_len + mode->upper_margin
 763             + mode->lower_margin; /* VTLN */
 764         tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 765         lcdc_write_chan(ch, LDVLNR, tmp);
 766
 767         tmp = mode->yres + mode->lower_margin; /* VSYNP */
 768         tmp |= mode->vsync_len << 16; /* VSYNW */
 769         lcdc_write_chan(ch, LDVSYNR, tmp);
 770
 771         /* Adjust horizontal synchronisation for HDMI */
 772         display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 773                         + mode->right_margin;
 774         tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 775             | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 776         lcdc_write_chan(ch, LDHAJR, tmp);
 777         lcdc_write_chan_mirror(ch, LDHAJR, tmp);
 778 }
 779
 780 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 781 {
 782         u32 format = 0;
 783
 784         if (!ovl->enabled) {
 785                 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 786                 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 787                 lcdc_write(ovl->channel->lcdc, LDBCR,
 788                            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 789                 return;
 790         }
 791
 792         ovl->base_addr_y = ovl->dma_handle;
 793         ovl->base_addr_c = ovl->dma_handle
 794                          + ovl->xres_virtual * ovl->yres_virtual;
 795
 796         switch (ovl->mode) {
 797         case LCDC_OVERLAY_BLEND:
 798                 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 799                 break;
 800
 801         case LCDC_OVERLAY_ROP3:
 802                 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 803                        | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 804                 break;
 805         }
 806
 807         switch (ovl->format->fourcc) {
 808         case V4L2_PIX_FMT_RGB565:
 809         case V4L2_PIX_FMT_NV21:
 810         case V4L2_PIX_FMT_NV61:
 811         case V4L2_PIX_FMT_NV42:
 812                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 813                 break;
 814         case V4L2_PIX_FMT_BGR24:
 815         case V4L2_PIX_FMT_NV12:
 816         case V4L2_PIX_FMT_NV16:
 817         case V4L2_PIX_FMT_NV24:
 818                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 819                 break;
 820         case V4L2_PIX_FMT_BGR32:
 821         default:
 822                 format |= LDBBSIFR_SWPL;
 823                 break;
 824         }
 825
 826         switch (ovl->format->fourcc) {
 827         case V4L2_PIX_FMT_RGB565:
 828                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 829                 break;
 830         case V4L2_PIX_FMT_BGR24:
 831                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 832                 break;
 833         case V4L2_PIX_FMT_BGR32:
 834                 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 835                 break;
 836         case V4L2_PIX_FMT_NV12:
 837         case V4L2_PIX_FMT_NV21:
 838                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 839                 break;
 840         case V4L2_PIX_FMT_NV16:
 841         case V4L2_PIX_FMT_NV61:
 842                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 843                 break;
 844         case V4L2_PIX_FMT_NV24:
 845         case V4L2_PIX_FMT_NV42:
 846                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 847                 break;
 848         }
 849
 850         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 851
 852         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 853
 854         lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 855                 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 856                 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 857         lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 858                 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 859                 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 860         lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 861                 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 862
 863         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 864         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 865
 866         lcdc_write(ovl->channel->lcdc, LDBCR,
 867                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 868 }
 869
 870 /*
 871  * __sh_mobile_lcdc_start - Configure and start the LCDC
 872  * @priv: LCDC device
 873  *
 874  * Configure all enabled channels and start the LCDC device. All external
 875  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 876  */
 877 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 878 {
 879         struct sh_mobile_lcdc_chan *ch;
 880         unsigned long tmp;
 881         int k, m;
 882
 883         /* Enable LCDC channels. Read data from external memory, avoid using the
 884          * BEU for now.
 885          */
 886         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 887
 888         /* Stop the LCDC first and disable all interrupts. */
 889         sh_mobile_lcdc_start_stop(priv, 0);
 890         lcdc_write(priv, _LDINTR, 0);
 891
 892         /* Configure power supply, dot clocks and start them. */
 893         tmp = priv->lddckr;
 894         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 895                 ch = &priv->ch[k];
 896                 if (!ch->enabled)
 897                         continue;
 898
 899                 /* Power supply */
 900                 lcdc_write_chan(ch, LDPMR, 0);
 901
 902                 m = ch->cfg->clock_divider;
 903                 if (!m)
 904                         continue;
 905
 906                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 907                  * denominator.
 908                  */
 909                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 910                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 911
 912                 if (m == 1)
 913                         m = LDDCKR_MOSEL;
 914                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 915         }
 916
 917         lcdc_write(priv, _LDDCKR, tmp);
 918         lcdc_write(priv, _LDDCKSTPR, 0);
 919         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 920
 921         /* Setup geometry, format, frame buffer memory and operation mode. */
 922         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 923                 ch = &priv->ch[k];
 924                 if (!ch->enabled)
 925                         continue;
 926
 927                 sh_mobile_lcdc_geometry(ch);
 928
 929                 tmp = ch->format->lddfr;
 930
 931                 if (ch->format->yuv) {
 932                         switch (ch->colorspace) {
 933                         case V4L2_COLORSPACE_REC709:
 934                                 tmp |= LDDFR_CF1;
 935                                 break;
 936                         case V4L2_COLORSPACE_JPEG:
 937                                 tmp |= LDDFR_CF0;
 938                                 break;
 939                         }
 940                 }
 941
 942                 lcdc_write_chan(ch, LDDFR, tmp);
 943                 lcdc_write_chan(ch, LDMLSR, ch->line_size);
 944                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
 945                 if (ch->format->yuv)
 946                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
 947
 948                 /* When using deferred I/O mode, configure the LCDC for one-shot
 949                  * operation and enable the frame end interrupt. Otherwise use
 950                  * continuous read mode.
 951                  */
 952                 if (ch->ldmt1r_value & LDMT1R_IFM &&
 953                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
 954                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
 955                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 956                 } else {
 957                         lcdc_write_chan(ch, LDSM1R, 0);
 958                 }
 959         }
 960
 961         /* Word and long word swap. */
 962         switch (priv->ch[0].format->fourcc) {
 963         case V4L2_PIX_FMT_RGB565:
 964         case V4L2_PIX_FMT_NV21:
 965         case V4L2_PIX_FMT_NV61:
 966         case V4L2_PIX_FMT_NV42:
 967                 tmp = LDDDSR_LS | LDDDSR_WS;
 968                 break;
 969         case V4L2_PIX_FMT_BGR24:
 970         case V4L2_PIX_FMT_NV12:
 971         case V4L2_PIX_FMT_NV16:
 972         case V4L2_PIX_FMT_NV24:
 973                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
 974                 break;
 975         case V4L2_PIX_FMT_BGR32:
 976         default:
 977                 tmp = LDDDSR_LS;
 978                 break;
 979         }
 980         lcdc_write(priv, _LDDDSR, tmp);
 981
 982         /* Enable the display output. */
 983         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
 984         sh_mobile_lcdc_start_stop(priv, 1);
 985         priv->started = 1;
 986 }
 987
 988 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 989 {
 990         struct sh_mobile_lcdc_chan *ch;
 991         unsigned long tmp;
 992         int ret;
 993         int k;
 994
 995         /* enable clocks before accessing the hardware */
 996         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 997                 if (priv->ch[k].enabled)
 998                         sh_mobile_lcdc_clk_on(priv);
 999         }
1000
1001         /* reset */
1002         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1003         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1004
1005         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1006                 const struct sh_mobile_lcdc_panel_cfg *panel;
1007
1008                 ch = &priv->ch[k];
1009                 if (!ch->enabled)
1010                         continue;
1011
1012                 panel = &ch->cfg->panel_cfg;
1013                 if (panel->setup_sys) {
1014                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1015                         if (ret)
1016                                 return ret;
1017                 }
1018         }
1019
1020         /* Compute frame buffer base address and pitch for each channel. */
1021         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1022                 ch = &priv->ch[k];
1023                 if (!ch->enabled)
1024                         continue;
1025
1026                 ch->base_addr_y = ch->dma_handle;
1027                 ch->base_addr_c = ch->dma_handle
1028                                 + ch->xres_virtual * ch->yres_virtual;
1029                 ch->line_size = ch->pitch;
1030         }
1031
1032         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1033                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1034                 sh_mobile_lcdc_overlay_setup(ovl);
1035         }
1036
1037         /* Start the LCDC. */
1038         __sh_mobile_lcdc_start(priv);
1039
1040         /* Setup deferred I/O, tell the board code to enable the panels, and
1041          * turn backlight on.
1042          */
1043         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1044                 ch = &priv->ch[k];
1045                 if (!ch->enabled)
1046                         continue;
1047
1048                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1049                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1050                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1051                         ch->defio.delay = msecs_to_jiffies(tmp);
1052                         ch->info->fbdefio = &ch->defio;
1053                         fb_deferred_io_init(ch->info);
1054                 }
1055
1056                 sh_mobile_lcdc_display_on(ch);
1057
1058                 if (ch->bl) {
1059                         ch->bl->props.power = FB_BLANK_UNBLANK;
1060                         backlight_update_status(ch->bl);
1061                 }
1062         }
1063
1064         return 0;
1065 }
1066
1067 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1068 {
1069         struct sh_mobile_lcdc_chan *ch;
1070         int k;
1071
1072         /* clean up deferred io and ask board code to disable panel */
1073         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1074                 ch = &priv->ch[k];
1075                 if (!ch->enabled)
1076                         continue;
1077
1078                 /* deferred io mode:
1079                  * flush frame, and wait for frame end interrupt
1080                  * clean up deferred io and enable clock
1081                  */
1082                 if (ch->info && ch->info->fbdefio) {
1083                         ch->frame_end = 0;
1084                         schedule_delayed_work(&ch->info->deferred_work, 0);
1085                         wait_event(ch->frame_end_wait, ch->frame_end);
1086                         fb_deferred_io_cleanup(ch->info);
1087                         ch->info->fbdefio = NULL;
1088                         sh_mobile_lcdc_clk_on(priv);
1089                 }
1090
1091                 if (ch->bl) {
1092                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1093                         backlight_update_status(ch->bl);
1094                 }
1095
1096                 sh_mobile_lcdc_display_off(ch);
1097         }
1098
1099         /* stop the lcdc */
1100         if (priv->started) {
1101                 sh_mobile_lcdc_start_stop(priv, 0);
1102                 priv->started = 0;
1103         }
1104
1105         /* stop clocks */
1106         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1107                 if (priv->ch[k].enabled)
1108                         sh_mobile_lcdc_clk_off(priv);
1109 }
1110
1111 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1112                                       struct fb_info *info)
1113 {
1114         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1115                 return -EINVAL;
1116
1117         /* Make sure the virtual resolution is at least as big as the visible
1118          * resolution.
1119          */
1120         if (var->xres_virtual < var->xres)
1121                 var->xres_virtual = var->xres;
1122         if (var->yres_virtual < var->yres)
1123                 var->yres_virtual = var->yres;
1124
1125         if (sh_mobile_format_is_fourcc(var)) {
1126                 const struct sh_mobile_lcdc_format_info *format;
1127
1128                 format = sh_mobile_format_info(var->grayscale);
1129                 if (format == NULL)
1130                         return -EINVAL;
1131                 var->bits_per_pixel = format->bpp;
1132
1133                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1134                  * respectively.
1135                  */
1136                 if (!format->yuv)
1137                         var->colorspace = V4L2_COLORSPACE_SRGB;
1138                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1139                         var->colorspace = V4L2_COLORSPACE_JPEG;
1140         } else {
1141                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1142                         var->bits_per_pixel = 16;
1143                         var->red.offset = 11;
1144                         var->red.length = 5;
1145                         var->green.offset = 5;
1146                         var->green.length = 6;
1147                         var->blue.offset = 0;
1148                         var->blue.length = 5;
1149                         var->transp.offset = 0;
1150                         var->transp.length = 0;
1151                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1152                         var->bits_per_pixel = 24;
1153                         var->red.offset = 16;
1154                         var->red.length = 8;
1155                         var->green.offset = 8;
1156                         var->green.length = 8;
1157                         var->blue.offset = 0;
1158                         var->blue.length = 8;
1159                         var->transp.offset = 0;
1160                         var->transp.length = 0;
1161                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1162                         var->bits_per_pixel = 32;
1163                         var->red.offset = 16;
1164                         var->red.length = 8;
1165                         var->green.offset = 8;
1166                         var->green.length = 8;
1167                         var->blue.offset = 0;
1168                         var->blue.length = 8;
1169                         var->transp.offset = 24;
1170                         var->transp.length = 8;
1171                 } else
1172                         return -EINVAL;
1173
1174                 var->red.msb_right = 0;
1175                 var->green.msb_right = 0;
1176                 var->blue.msb_right = 0;
1177                 var->transp.msb_right = 0;
1178         }
1179
1180         /* Make sure we don't exceed our allocated memory. */
1181         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1182             info->fix.smem_len)
1183                 return -EINVAL;
1184
1185         return 0;
1186 }
1187
1188 /* -----------------------------------------------------------------------------
1189  * Frame buffer operations - Overlays
1190  */
1191
1192 static ssize_t
1193 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1194 {
1195         struct fb_info *info = dev_get_drvdata(dev);
1196         struct sh_mobile_lcdc_overlay *ovl = info->par;
1197
1198         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1199 }
1200
1201 static ssize_t
1202 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1203                     const char *buf, size_t count)
1204 {
1205         struct fb_info *info = dev_get_drvdata(dev);
1206         struct sh_mobile_lcdc_overlay *ovl = info->par;
1207         unsigned int alpha;
1208         char *endp;
1209
1210         alpha = simple_strtoul(buf, &endp, 10);
1211         if (isspace(*endp))
1212                 endp++;
1213
1214         if (endp - buf != count)
1215                 return -EINVAL;
1216
1217         if (alpha > 255)
1218                 return -EINVAL;
1219
1220         if (ovl->alpha != alpha) {
1221                 ovl->alpha = alpha;
1222
1223                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1224                         sh_mobile_lcdc_overlay_setup(ovl);
1225         }
1226
1227         return count;
1228 }
1229
1230 static ssize_t
1231 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1232 {
1233         struct fb_info *info = dev_get_drvdata(dev);
1234         struct sh_mobile_lcdc_overlay *ovl = info->par;
1235
1236         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1237 }
1238
1239 static ssize_t
1240 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1241                    const char *buf, size_t count)
1242 {
1243         struct fb_info *info = dev_get_drvdata(dev);
1244         struct sh_mobile_lcdc_overlay *ovl = info->par;
1245         unsigned int mode;
1246         char *endp;
1247
1248         mode = simple_strtoul(buf, &endp, 10);
1249         if (isspace(*endp))
1250                 endp++;
1251
1252         if (endp - buf != count)
1253                 return -EINVAL;
1254
1255         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1256                 return -EINVAL;
1257
1258         if (ovl->mode != mode) {
1259                 ovl->mode = mode;
1260
1261                 if (ovl->enabled)
1262                         sh_mobile_lcdc_overlay_setup(ovl);
1263         }
1264
1265         return count;
1266 }
1267
1268 static ssize_t
1269 overlay_position_show(struct device *dev, struct device_attribute *attr,
1270                       char *buf)
1271 {
1272         struct fb_info *info = dev_get_drvdata(dev);
1273         struct sh_mobile_lcdc_overlay *ovl = info->par;
1274
1275         return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1276 }
1277
1278 static ssize_t
1279 overlay_position_store(struct device *dev, struct device_attribute *attr,
1280                        const char *buf, size_t count)
1281 {
1282         struct fb_info *info = dev_get_drvdata(dev);
1283         struct sh_mobile_lcdc_overlay *ovl = info->par;
1284         char *endp;
1285         int pos_x;
1286         int pos_y;
1287
1288         pos_x = simple_strtol(buf, &endp, 10);
1289         if (*endp != ',')
1290                 return -EINVAL;
1291
1292         pos_y = simple_strtol(endp + 1, &endp, 10);
1293         if (isspace(*endp))
1294                 endp++;
1295
1296         if (endp - buf != count)
1297                 return -EINVAL;
1298
1299         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1300                 ovl->pos_x = pos_x;
1301                 ovl->pos_y = pos_y;
1302
1303                 if (ovl->enabled)
1304                         sh_mobile_lcdc_overlay_setup(ovl);
1305         }
1306
1307         return count;
1308 }
1309
1310 static ssize_t
1311 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1312 {
1313         struct fb_info *info = dev_get_drvdata(dev);
1314         struct sh_mobile_lcdc_overlay *ovl = info->par;
1315
1316         return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1317 }
1318
1319 static ssize_t
1320 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1321                     const char *buf, size_t count)
1322 {
1323         struct fb_info *info = dev_get_drvdata(dev);
1324         struct sh_mobile_lcdc_overlay *ovl = info->par;
1325         unsigned int rop3;
1326         char *endp;
1327
1328         rop3 = simple_strtoul(buf, &endp, 10);
1329         if (isspace(*endp))
1330                 endp++;
1331
1332         if (endp - buf != count)
1333                 return -EINVAL;
1334
1335         if (rop3 > 255)
1336                 return -EINVAL;
1337
1338         if (ovl->rop3 != rop3) {
1339                 ovl->rop3 = rop3;
1340
1341                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1342                         sh_mobile_lcdc_overlay_setup(ovl);
1343         }
1344
1345         return count;
1346 }
1347
1348 static const struct device_attribute overlay_sysfs_attrs[] = {
1349         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1350                overlay_alpha_show, overlay_alpha_store),
1351         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1352                overlay_mode_show, overlay_mode_store),
1353         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1354                overlay_position_show, overlay_position_store),
1355         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1356                overlay_rop3_show, overlay_rop3_store),
1357 };
1358
1359 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1360         .id =           "SH Mobile LCDC",
1361         .type =         FB_TYPE_PACKED_PIXELS,
1362         .visual =       FB_VISUAL_TRUECOLOR,
1363         .accel =        FB_ACCEL_NONE,
1364         .xpanstep =     1,
1365         .ypanstep =     1,
1366         .ywrapstep =    0,
1367         .capabilities = FB_CAP_FOURCC,
1368 };
1369
1370 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1371                                     struct fb_info *info)
1372 {
1373         struct sh_mobile_lcdc_overlay *ovl = info->par;
1374         unsigned long base_addr_y;
1375         unsigned long base_addr_c;
1376         unsigned long y_offset;
1377         unsigned long c_offset;
1378
1379         if (!ovl->format->yuv) {
1380                 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1381                          * ovl->format->bpp / 8;
1382                 c_offset = 0;
1383         } else {
1384                 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1385                 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1386
1387                 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1388                 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1389                          + var->xoffset * 2 / xsub;
1390         }
1391
1392         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1393          * nothing to do in that case.
1394          */
1395         if (y_offset == ovl->pan_y_offset)
1396                 return 0;
1397
1398         /* Set the source address for the next refresh */
1399         base_addr_y = ovl->dma_handle + y_offset;
1400         base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1401                     + c_offset;
1402
1403         ovl->base_addr_y = base_addr_y;
1404         ovl->base_addr_c = base_addr_c;
1405         ovl->pan_y_offset = y_offset;
1406
1407         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1408
1409         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1410         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1411
1412         lcdc_write(ovl->channel->lcdc, LDBCR,
1413                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1414
1415         return 0;
1416 }
1417
1418 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1419                                       unsigned long arg)
1420 {
1421         struct sh_mobile_lcdc_overlay *ovl = info->par;
1422
1423         switch (cmd) {
1424         case FBIO_WAITFORVSYNC:
1425                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1426
1427         default:
1428                 return -ENOIOCTLCMD;
1429         }
1430 }
1431
1432 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1433                                           struct fb_info *info)
1434 {
1435         return __sh_mobile_lcdc_check_var(var, info);
1436 }
1437
1438 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1439 {
1440         struct sh_mobile_lcdc_overlay *ovl = info->par;
1441
1442         ovl->format =
1443                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1444
1445         ovl->xres = info->var.xres;
1446         ovl->xres_virtual = info->var.xres_virtual;
1447         ovl->yres = info->var.yres;
1448         ovl->yres_virtual = info->var.yres_virtual;
1449
1450         if (ovl->format->yuv)
1451                 ovl->pitch = info->var.xres_virtual;
1452         else
1453                 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1454
1455         sh_mobile_lcdc_overlay_setup(ovl);
1456
1457         info->fix.line_length = ovl->pitch;
1458
1459         if (sh_mobile_format_is_fourcc(&info->var)) {
1460                 info->fix.type = FB_TYPE_FOURCC;
1461                 info->fix.visual = FB_VISUAL_FOURCC;
1462         } else {
1463                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1464                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1465         }
1466
1467         return 0;
1468 }
1469
1470 /* Overlay blanking. Disable the overlay when blanked. */
1471 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1472 {
1473         struct sh_mobile_lcdc_overlay *ovl = info->par;
1474
1475         ovl->enabled = !blank;
1476         sh_mobile_lcdc_overlay_setup(ovl);
1477
1478         /* Prevent the backlight from receiving a blanking event by returning
1479          * a non-zero value.
1480          */
1481         return 1;
1482 }
1483
1484 static int
1485 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1486 {
1487         struct sh_mobile_lcdc_overlay *ovl = info->par;
1488
1489         return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1490                                  ovl->dma_handle, ovl->fb_size);
1491 }
1492
1493 static const struct fb_ops sh_mobile_lcdc_overlay_ops = {
1494         .owner          = THIS_MODULE,
1495         .fb_read        = fb_sys_read,
1496         .fb_write       = fb_sys_write,
1497         .fb_fillrect    = sys_fillrect,
1498         .fb_copyarea    = sys_copyarea,
1499         .fb_imageblit   = sys_imageblit,
1500         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1501         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1502         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1503         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1504         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1505         .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1506 };
1507
1508 static void
1509 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1510 {
1511         struct fb_info *info = ovl->info;
1512
1513         if (info == NULL || info->dev == NULL)
1514                 return;
1515
1516         unregister_framebuffer(ovl->info);
1517 }
1518
1519 static int
1520 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1521 {
1522         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1523         struct fb_info *info = ovl->info;
1524         unsigned int i;
1525         int ret;
1526
1527         if (info == NULL)
1528                 return 0;
1529
1530         ret = register_framebuffer(info);
1531         if (ret < 0)
1532                 return ret;
1533
1534         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1535                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1536                  info->var.yres, info->var.bits_per_pixel);
1537
1538         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1539                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1540                 if (ret < 0)
1541                         return ret;
1542         }
1543
1544         return 0;
1545 }
1546
1547 static void
1548 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1549 {
1550         struct fb_info *info = ovl->info;
1551
1552         if (info == NULL || info->device == NULL)
1553                 return;
1554
1555         framebuffer_release(info);
1556 }
1557
1558 static int
1559 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1560 {
1561         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1562         struct fb_var_screeninfo *var;
1563         struct fb_info *info;
1564
1565         /* Allocate and initialize the frame buffer device. */
1566         info = framebuffer_alloc(0, priv->dev);
1567         if (!info)
1568                 return -ENOMEM;
1569
1570         ovl->info = info;
1571
1572         info->flags = FBINFO_FLAG_DEFAULT;
1573         info->fbops = &sh_mobile_lcdc_overlay_ops;
1574         info->device = priv->dev;
1575         info->screen_buffer = ovl->fb_mem;
1576         info->par = ovl;
1577
1578         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1579          * for NV12 and NV21.
1580          */
1581         info->fix = sh_mobile_lcdc_overlay_fix;
1582         snprintf(info->fix.id, sizeof(info->fix.id),
1583                  "SH Mobile LCDC Overlay %u", ovl->index);
1584         info->fix.smem_start = ovl->dma_handle;
1585         info->fix.smem_len = ovl->fb_size;
1586         info->fix.line_length = ovl->pitch;
1587
1588         if (ovl->format->yuv)
1589                 info->fix.visual = FB_VISUAL_FOURCC;
1590         else
1591                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1592
1593         switch (ovl->format->fourcc) {
1594         case V4L2_PIX_FMT_NV12:
1595         case V4L2_PIX_FMT_NV21:
1596                 info->fix.ypanstep = 2;
1597                 fallthrough;
1598         case V4L2_PIX_FMT_NV16:
1599         case V4L2_PIX_FMT_NV61:
1600                 info->fix.xpanstep = 2;
1601         }
1602
1603         /* Initialize variable screen information. */
1604         var = &info->var;
1605         memset(var, 0, sizeof(*var));
1606         var->xres = ovl->xres;
1607         var->yres = ovl->yres;
1608         var->xres_virtual = ovl->xres_virtual;
1609         var->yres_virtual = ovl->yres_virtual;
1610         var->activate = FB_ACTIVATE_NOW;
1611
1612         /* Use the legacy API by default for RGB formats, and the FOURCC API
1613          * for YUV formats.
1614          */
1615         if (!ovl->format->yuv)
1616                 var->bits_per_pixel = ovl->format->bpp;
1617         else
1618                 var->grayscale = ovl->format->fourcc;
1619
1620         return sh_mobile_lcdc_overlay_check_var(var, info);
1621 }
1622
1623 /* -----------------------------------------------------------------------------
1624  * Frame buffer operations - main frame buffer
1625  */
1626
1627 static int sh_mobile_lcdc_setcolreg(u_int regno,
1628                                     u_int red, u_int green, u_int blue,
1629                                     u_int transp, struct fb_info *info)
1630 {
1631         u32 *palette = info->pseudo_palette;
1632
1633         if (regno >= PALETTE_NR)
1634                 return -EINVAL;
1635
1636         /* only FB_VISUAL_TRUECOLOR supported */
1637
1638         red >>= 16 - info->var.red.length;
1639         green >>= 16 - info->var.green.length;
1640         blue >>= 16 - info->var.blue.length;
1641         transp >>= 16 - info->var.transp.length;
1642
1643         palette[regno] = (red << info->var.red.offset) |
1644           (green << info->var.green.offset) |
1645           (blue << info->var.blue.offset) |
1646           (transp << info->var.transp.offset);
1647
1648         return 0;
1649 }
1650
1651 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1652         .id =           "SH Mobile LCDC",
1653         .type =         FB_TYPE_PACKED_PIXELS,
1654         .visual =       FB_VISUAL_TRUECOLOR,
1655         .accel =        FB_ACCEL_NONE,
1656         .xpanstep =     1,
1657         .ypanstep =     1,
1658         .ywrapstep =    0,
1659         .capabilities = FB_CAP_FOURCC,
1660 };
1661
1662 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1663                                     const struct fb_fillrect *rect)
1664 {
1665         sys_fillrect(info, rect);
1666         sh_mobile_lcdc_deferred_io_touch(info);
1667 }
1668
1669 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1670                                     const struct fb_copyarea *area)
1671 {
1672         sys_copyarea(info, area);
1673         sh_mobile_lcdc_deferred_io_touch(info);
1674 }
1675
1676 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1677                                      const struct fb_image *image)
1678 {
1679         sys_imageblit(info, image);
1680         sh_mobile_lcdc_deferred_io_touch(info);
1681 }
1682
1683 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1684                               struct fb_info *info)
1685 {
1686         struct sh_mobile_lcdc_chan *ch = info->par;
1687         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1688         unsigned long ldrcntr;
1689         unsigned long base_addr_y, base_addr_c;
1690         unsigned long y_offset;
1691         unsigned long c_offset;
1692
1693         if (!ch->format->yuv) {
1694                 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1695                          * ch->format->bpp / 8;
1696                 c_offset = 0;
1697         } else {
1698                 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1699                 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1700
1701                 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1702                 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1703                          + var->xoffset * 2 / xsub;
1704         }
1705
1706         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1707          * nothing to do in that case.
1708          */
1709         if (y_offset == ch->pan_y_offset)
1710                 return 0;
1711
1712         /* Set the source address for the next refresh */
1713         base_addr_y = ch->dma_handle + y_offset;
1714         base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1715                     + c_offset;
1716
1717         ch->base_addr_y = base_addr_y;
1718         ch->base_addr_c = base_addr_c;
1719         ch->pan_y_offset = y_offset;
1720
1721         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1722         if (ch->format->yuv)
1723                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1724
1725         ldrcntr = lcdc_read(priv, _LDRCNTR);
1726         if (lcdc_chan_is_sublcd(ch))
1727                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1728         else
1729                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1730
1731
1732         sh_mobile_lcdc_deferred_io_touch(info);
1733
1734         return 0;
1735 }
1736
1737 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1738                                 unsigned long arg)
1739 {
1740         struct sh_mobile_lcdc_chan *ch = info->par;
1741         int retval;
1742
1743         switch (cmd) {
1744         case FBIO_WAITFORVSYNC:
1745                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1746                 break;
1747
1748         default:
1749                 retval = -ENOIOCTLCMD;
1750                 break;
1751         }
1752         return retval;
1753 }
1754
1755 static void sh_mobile_fb_reconfig(struct fb_info *info)
1756 {
1757         struct sh_mobile_lcdc_chan *ch = info->par;
1758         struct fb_var_screeninfo var;
1759         struct fb_videomode mode;
1760
1761         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1762                 /* More framebuffer users are active */
1763                 return;
1764
1765         fb_var_to_videomode(&mode, &info->var);
1766
1767         if (fb_mode_is_equal(&ch->display.mode, &mode))
1768                 return;
1769
1770         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1771         var = info->var;
1772         fb_videomode_to_var(&var, &ch->display.mode);
1773         var.width = ch->display.width;
1774         var.height = ch->display.height;
1775         var.activate = FB_ACTIVATE_NOW;
1776
1777         if (fb_set_var(info, &var) < 0)
1778                 /* Couldn't reconfigure, hopefully, can continue as before */
1779                 return;
1780
1781         fbcon_update_vcs(info, true);
1782 }
1783
1784 /*
1785  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1786  * user == 1, or with console sem held, if user == 0.
1787  */
1788 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1789 {
1790         struct sh_mobile_lcdc_chan *ch = info->par;
1791
1792         mutex_lock(&ch->open_lock);
1793         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1794
1795         ch->use_count--;
1796
1797         /* Nothing to reconfigure, when called from fbcon */
1798         if (user) {
1799                 console_lock();
1800                 sh_mobile_fb_reconfig(info);
1801                 console_unlock();
1802         }
1803
1804         mutex_unlock(&ch->open_lock);
1805
1806         return 0;
1807 }
1808
1809 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1810 {
1811         struct sh_mobile_lcdc_chan *ch = info->par;
1812
1813         mutex_lock(&ch->open_lock);
1814         ch->use_count++;
1815
1816         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1817         mutex_unlock(&ch->open_lock);
1818
1819         return 0;
1820 }
1821
1822 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1823                                     struct fb_info *info)
1824 {
1825         struct sh_mobile_lcdc_chan *ch = info->par;
1826         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1827         unsigned int best_dist = (unsigned int)-1;
1828         unsigned int best_xres = 0;
1829         unsigned int best_yres = 0;
1830         unsigned int i;
1831         int ret;
1832
1833         /* If board code provides us with a list of available modes, make sure
1834          * we use one of them. Find the mode closest to the requested one. The
1835          * distance between two modes is defined as the size of the
1836          * non-overlapping parts of the two rectangles.
1837          */
1838         for (i = 0; i < ch->cfg->num_modes; ++i) {
1839                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1840                 unsigned int dist;
1841
1842                 /* We can only round up. */
1843                 if (var->xres > mode->xres || var->yres > mode->yres)
1844                         continue;
1845
1846                 dist = var->xres * var->yres + mode->xres * mode->yres
1847                      - 2 * min(var->xres, mode->xres)
1848                          * min(var->yres, mode->yres);
1849
1850                 if (dist < best_dist) {
1851                         best_xres = mode->xres;
1852                         best_yres = mode->yres;
1853                         best_dist = dist;
1854                 }
1855         }
1856
1857         /* If no available mode can be used, return an error. */
1858         if (ch->cfg->num_modes != 0) {
1859                 if (best_dist == (unsigned int)-1)
1860                         return -EINVAL;
1861
1862                 var->xres = best_xres;
1863                 var->yres = best_yres;
1864         }
1865
1866         ret = __sh_mobile_lcdc_check_var(var, info);
1867         if (ret < 0)
1868                 return ret;
1869
1870         /* only accept the forced_fourcc for dual channel configurations */
1871         if (p->forced_fourcc &&
1872             p->forced_fourcc != sh_mobile_format_fourcc(var))
1873                 return -EINVAL;
1874
1875         return 0;
1876 }
1877
1878 static int sh_mobile_lcdc_set_par(struct fb_info *info)
1879 {
1880         struct sh_mobile_lcdc_chan *ch = info->par;
1881         int ret;
1882
1883         sh_mobile_lcdc_stop(ch->lcdc);
1884
1885         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1886         ch->colorspace = info->var.colorspace;
1887
1888         ch->xres = info->var.xres;
1889         ch->xres_virtual = info->var.xres_virtual;
1890         ch->yres = info->var.yres;
1891         ch->yres_virtual = info->var.yres_virtual;
1892
1893         if (ch->format->yuv)
1894                 ch->pitch = info->var.xres_virtual;
1895         else
1896                 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
1897
1898         ret = sh_mobile_lcdc_start(ch->lcdc);
1899         if (ret < 0)
1900                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1901
1902         info->fix.line_length = ch->pitch;
1903
1904         if (sh_mobile_format_is_fourcc(&info->var)) {
1905                 info->fix.type = FB_TYPE_FOURCC;
1906                 info->fix.visual = FB_VISUAL_FOURCC;
1907         } else {
1908                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1909                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1910         }
1911
1912         return ret;
1913 }
1914
1915 /*
1916  * Screen blanking. Behavior is as follows:
1917  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1918  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1919  * FB_BLANK_VSYNC,
1920  * FB_BLANK_HSYNC,
1921  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1922  */
1923 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1924 {
1925         struct sh_mobile_lcdc_chan *ch = info->par;
1926         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1927
1928         /* blank the screen? */
1929         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1930                 struct fb_fillrect rect = {
1931                         .width = ch->xres,
1932                         .height = ch->yres,
1933                 };
1934                 sh_mobile_lcdc_fillrect(info, &rect);
1935         }
1936         /* turn clocks on? */
1937         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1938                 sh_mobile_lcdc_clk_on(p);
1939         }
1940         /* turn clocks off? */
1941         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1942                 /* make sure the screen is updated with the black fill before
1943                  * switching the clocks off. one vsync is not enough since
1944                  * blanking may occur in the middle of a refresh. deferred io
1945                  * mode will reenable the clocks and update the screen in time,
1946                  * so it does not need this. */
1947                 if (!info->fbdefio) {
1948                         sh_mobile_lcdc_wait_for_vsync(ch);
1949                         sh_mobile_lcdc_wait_for_vsync(ch);
1950                 }
1951                 sh_mobile_lcdc_clk_off(p);
1952         }
1953
1954         ch->blank_status = blank;
1955         return 0;
1956 }
1957
1958 static int
1959 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
1960 {
1961         struct sh_mobile_lcdc_chan *ch = info->par;
1962
1963         return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
1964                                  ch->dma_handle, ch->fb_size);
1965 }
1966
1967 static const struct fb_ops sh_mobile_lcdc_ops = {
1968         .owner          = THIS_MODULE,
1969         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
1970         .fb_read        = fb_sys_read,
1971         .fb_write       = fb_sys_write,
1972         .fb_fillrect    = sh_mobile_lcdc_fillrect,
1973         .fb_copyarea    = sh_mobile_lcdc_copyarea,
1974         .fb_imageblit   = sh_mobile_lcdc_imageblit,
1975         .fb_blank       = sh_mobile_lcdc_blank,
1976         .fb_pan_display = sh_mobile_lcdc_pan,
1977         .fb_ioctl       = sh_mobile_lcdc_ioctl,
1978         .fb_open        = sh_mobile_lcdc_open,
1979         .fb_release     = sh_mobile_lcdc_release,
1980         .fb_check_var   = sh_mobile_lcdc_check_var,
1981         .fb_set_par     = sh_mobile_lcdc_set_par,
1982         .fb_mmap        = sh_mobile_lcdc_mmap,
1983 };
1984
1985 static void
1986 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
1987 {
1988         if (ch->info && ch->info->dev)
1989                 unregister_framebuffer(ch->info);
1990 }
1991
1992 static int
1993 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
1994 {
1995         struct fb_info *info = ch->info;
1996         int ret;
1997
1998         if (info->fbdefio) {
1999                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2000                                      ch->fb_size >> PAGE_SHIFT);
2001                 if (!ch->sglist)
2002                         return -ENOMEM;
2003         }
2004
2005         info->bl_dev = ch->bl;
2006
2007         ret = register_framebuffer(info);
2008         if (ret < 0)
2009                 return ret;
2010
2011         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2012                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2013                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2014                  info->var.bits_per_pixel);
2015
2016         /* deferred io mode: disable clock to save power */
2017         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2018                 sh_mobile_lcdc_clk_off(ch->lcdc);
2019
2020         return ret;
2021 }
2022
2023 static void
2024 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2025 {
2026         struct fb_info *info = ch->info;
2027
2028         if (!info || !info->device)
2029                 return;
2030
2031         vfree(ch->sglist);
2032
2033         fb_dealloc_cmap(&info->cmap);
2034         framebuffer_release(info);
2035 }
2036
2037 static int
2038 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2039                                const struct fb_videomode *modes,
2040                                unsigned int num_modes)
2041 {
2042         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2043         struct fb_var_screeninfo *var;
2044         struct fb_info *info;
2045         int ret;
2046
2047         /* Allocate and initialize the frame buffer device. Create the modes
2048          * list and allocate the color map.
2049          */
2050         info = framebuffer_alloc(0, priv->dev);
2051         if (!info)
2052                 return -ENOMEM;
2053
2054         ch->info = info;
2055
2056         info->flags = FBINFO_FLAG_DEFAULT;
2057         info->fbops = &sh_mobile_lcdc_ops;
2058         info->device = priv->dev;
2059         info->screen_buffer = ch->fb_mem;
2060         info->pseudo_palette = &ch->pseudo_palette;
2061         info->par = ch;
2062
2063         fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2064
2065         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2066         if (ret < 0) {
2067                 dev_err(priv->dev, "unable to allocate cmap\n");
2068                 return ret;
2069         }
2070
2071         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2072          * for NV12 and NV21.
2073          */
2074         info->fix = sh_mobile_lcdc_fix;
2075         info->fix.smem_start = ch->dma_handle;
2076         info->fix.smem_len = ch->fb_size;
2077         info->fix.line_length = ch->pitch;
2078
2079         if (ch->format->yuv)
2080                 info->fix.visual = FB_VISUAL_FOURCC;
2081         else
2082                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2083
2084         switch (ch->format->fourcc) {
2085         case V4L2_PIX_FMT_NV12:
2086         case V4L2_PIX_FMT_NV21:
2087                 info->fix.ypanstep = 2;
2088                 fallthrough;
2089         case V4L2_PIX_FMT_NV16:
2090         case V4L2_PIX_FMT_NV61:
2091                 info->fix.xpanstep = 2;
2092         }
2093
2094         /* Initialize variable screen information using the first mode as
2095          * default.
2096          */
2097         var = &info->var;
2098         fb_videomode_to_var(var, modes);
2099         var->width = ch->display.width;
2100         var->height = ch->display.height;
2101         var->xres_virtual = ch->xres_virtual;
2102         var->yres_virtual = ch->yres_virtual;
2103         var->activate = FB_ACTIVATE_NOW;
2104
2105         /* Use the legacy API by default for RGB formats, and the FOURCC API
2106          * for YUV formats.
2107          */
2108         if (!ch->format->yuv)
2109                 var->bits_per_pixel = ch->format->bpp;
2110         else
2111                 var->grayscale = ch->format->fourcc;
2112
2113         ret = sh_mobile_lcdc_check_var(var, info);
2114         if (ret)
2115                 return ret;
2116
2117         return 0;
2118 }
2119
2120 /* -----------------------------------------------------------------------------
2121  * Backlight
2122  */
2123
2124 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2125 {
2126         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2127         int brightness = bdev->props.brightness;
2128
2129         if (bdev->props.power != FB_BLANK_UNBLANK ||
2130             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2131                 brightness = 0;
2132
2133         ch->bl_brightness = brightness;
2134         return ch->cfg->bl_info.set_brightness(brightness);
2135 }
2136
2137 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2138 {
2139         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2140
2141         return ch->bl_brightness;
2142 }
2143
2144 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2145                                    struct fb_info *info)
2146 {
2147         return (info->bl_dev == bdev);
2148 }
2149
2150 static const struct backlight_ops sh_mobile_lcdc_bl_ops = {
2151         .options        = BL_CORE_SUSPENDRESUME,
2152         .update_status  = sh_mobile_lcdc_update_bl,
2153         .get_brightness = sh_mobile_lcdc_get_brightness,
2154         .check_fb       = sh_mobile_lcdc_check_fb,
2155 };
2156
2157 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2158                                                struct sh_mobile_lcdc_chan *ch)
2159 {
2160         struct backlight_device *bl;
2161
2162         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2163                                        &sh_mobile_lcdc_bl_ops, NULL);
2164         if (IS_ERR(bl)) {
2165                 dev_err(parent, "unable to register backlight device: %ld\n",
2166                         PTR_ERR(bl));
2167                 return NULL;
2168         }
2169
2170         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2171         bl->props.brightness = bl->props.max_brightness;
2172         backlight_update_status(bl);
2173
2174         return bl;
2175 }
2176
2177 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2178 {
2179         backlight_device_unregister(bdev);
2180 }
2181
2182 /* -----------------------------------------------------------------------------
2183  * Power management
2184  */
2185
2186 static int sh_mobile_lcdc_suspend(struct device *dev)
2187 {
2188         struct platform_device *pdev = to_platform_device(dev);
2189
2190         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2191         return 0;
2192 }
2193
2194 static int sh_mobile_lcdc_resume(struct device *dev)
2195 {
2196         struct platform_device *pdev = to_platform_device(dev);
2197
2198         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2199 }
2200
2201 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2202 {
2203         struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2204
2205         /* turn off LCDC hardware */
2206         lcdc_write(priv, _LDCNT1R, 0);
2207
2208         return 0;
2209 }
2210
2211 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2212 {
2213         struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2214
2215         __sh_mobile_lcdc_start(priv);
2216
2217         return 0;
2218 }
2219
2220 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2221         .suspend = sh_mobile_lcdc_suspend,
2222         .resume = sh_mobile_lcdc_resume,
2223         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2224         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2225 };
2226
2227 /* -----------------------------------------------------------------------------
2228  * Framebuffer notifier
2229  */
2230
2231 /* -----------------------------------------------------------------------------
2232  * Probe/remove and driver init/exit
2233  */
2234
2235 static const struct fb_videomode default_720p = {
2236         .name = "HDMI 720p",
2237         .xres = 1280,
2238         .yres = 720,
2239
2240         .left_margin = 220,
2241         .right_margin = 110,
2242         .hsync_len = 40,
2243
2244         .upper_margin = 20,
2245         .lower_margin = 5,
2246         .vsync_len = 5,
2247
2248         .pixclock = 13468,
2249         .refresh = 60,
2250         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2251 };
2252
2253 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2254 {
2255         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2256         unsigned int i;
2257
2258         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2259                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2260         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2261                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2262
2263         sh_mobile_lcdc_stop(priv);
2264
2265         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2266                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2267
2268                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2269
2270                 if (ovl->fb_mem)
2271                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2272                                           ovl->fb_mem, ovl->dma_handle);
2273         }
2274
2275         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2276                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2277
2278                 if (ch->tx_dev) {
2279                         ch->tx_dev->lcdc = NULL;
2280                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2281                 }
2282
2283                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2284
2285                 if (ch->fb_mem)
2286                         dma_free_coherent(&pdev->dev, ch->fb_size,
2287                                           ch->fb_mem, ch->dma_handle);
2288         }
2289
2290         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2291                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2292
2293                 if (ch->bl)
2294                         sh_mobile_lcdc_bl_remove(ch->bl);
2295                 mutex_destroy(&ch->open_lock);
2296         }
2297
2298         if (priv->dot_clk) {
2299                 pm_runtime_disable(&pdev->dev);
2300                 clk_put(priv->dot_clk);
2301         }
2302
2303         if (priv->base)
2304                 iounmap(priv->base);
2305
2306         if (priv->irq)
2307                 free_irq(priv->irq, priv);
2308         kfree(priv);
2309         return 0;
2310 }
2311
2312 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2313 {
2314         int interface_type = ch->cfg->interface_type;
2315
2316         switch (interface_type) {
2317         case RGB8:
2318         case RGB9:
2319         case RGB12A:
2320         case RGB12B:
2321         case RGB16:
2322         case RGB18:
2323         case RGB24:
2324         case SYS8A:
2325         case SYS8B:
2326         case SYS8C:
2327         case SYS8D:
2328         case SYS9:
2329         case SYS12:
2330         case SYS16A:
2331         case SYS16B:
2332         case SYS16C:
2333         case SYS18:
2334         case SYS24:
2335                 break;
2336         default:
2337                 return -EINVAL;
2338         }
2339
2340         /* SUBLCD only supports SYS interface */
2341         if (lcdc_chan_is_sublcd(ch)) {
2342                 if (!(interface_type & LDMT1R_IFM))
2343                         return -EINVAL;
2344
2345                 interface_type &= ~LDMT1R_IFM;
2346         }
2347
2348         ch->ldmt1r_value = interface_type;
2349         return 0;
2350 }
2351
2352 static int
2353 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2354 {
2355         const struct sh_mobile_lcdc_format_info *format;
2356         struct device *dev = ovl->channel->lcdc->dev;
2357         int ret;
2358
2359         if (ovl->cfg->fourcc == 0)
2360                 return 0;
2361
2362         /* Validate the format. */
2363         format = sh_mobile_format_info(ovl->cfg->fourcc);
2364         if (format == NULL) {
2365                 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2366                 return -EINVAL;
2367         }
2368
2369         ovl->enabled = false;
2370         ovl->mode = LCDC_OVERLAY_BLEND;
2371         ovl->alpha = 255;
2372         ovl->rop3 = 0;
2373         ovl->pos_x = 0;
2374         ovl->pos_y = 0;
2375
2376         /* The default Y virtual resolution is twice the panel size to allow for
2377          * double-buffering.
2378          */
2379         ovl->format = format;
2380         ovl->xres = ovl->cfg->max_xres;
2381         ovl->xres_virtual = ovl->xres;
2382         ovl->yres = ovl->cfg->max_yres;
2383         ovl->yres_virtual = ovl->yres * 2;
2384
2385         if (!format->yuv)
2386                 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2387         else
2388                 ovl->pitch = ovl->xres_virtual;
2389
2390         /* Allocate frame buffer memory. */
2391         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2392                        * format->bpp / 8 * 2;
2393         ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2394                                          GFP_KERNEL);
2395         if (!ovl->fb_mem) {
2396                 dev_err(dev, "unable to allocate buffer\n");
2397                 return -ENOMEM;
2398         }
2399
2400         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2401         if (ret < 0)
2402                 return ret;
2403
2404         return 0;
2405 }
2406
2407 static int
2408 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2409 {
2410         const struct sh_mobile_lcdc_format_info *format;
2411         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2412         struct device *dev = ch->lcdc->dev;
2413         const struct fb_videomode *max_mode;
2414         const struct fb_videomode *mode;
2415         unsigned int num_modes;
2416         unsigned int max_size;
2417         unsigned int i;
2418
2419         /* Validate the format. */
2420         format = sh_mobile_format_info(cfg->fourcc);
2421         if (format == NULL) {
2422                 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2423                 return -EINVAL;
2424         }
2425
2426         /* Iterate through the modes to validate them and find the highest
2427          * resolution.
2428          */
2429         max_mode = NULL;
2430         max_size = 0;
2431
2432         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2433                 unsigned int size = mode->yres * mode->xres;
2434
2435                 /* NV12/NV21 buffers must have even number of lines */
2436                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2437                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2438                         dev_err(dev, "yres must be multiple of 2 for "
2439                                 "YCbCr420 mode.\n");
2440                         return -EINVAL;
2441                 }
2442
2443                 if (size > max_size) {
2444                         max_mode = mode;
2445                         max_size = size;
2446                 }
2447         }
2448
2449         if (!max_size)
2450                 max_size = MAX_XRES * MAX_YRES;
2451         else
2452                 dev_dbg(dev, "Found largest videomode %ux%u\n",
2453                         max_mode->xres, max_mode->yres);
2454
2455         if (cfg->lcd_modes == NULL) {
2456                 mode = &default_720p;
2457                 num_modes = 1;
2458         } else {
2459                 mode = cfg->lcd_modes;
2460                 num_modes = cfg->num_modes;
2461         }
2462
2463         /* Use the first mode as default. The default Y virtual resolution is
2464          * twice the panel size to allow for double-buffering.
2465          */
2466         ch->format = format;
2467         ch->xres = mode->xres;
2468         ch->xres_virtual = mode->xres;
2469         ch->yres = mode->yres;
2470         ch->yres_virtual = mode->yres * 2;
2471
2472         if (!format->yuv) {
2473                 ch->colorspace = V4L2_COLORSPACE_SRGB;
2474                 ch->pitch = ch->xres_virtual * format->bpp / 8;
2475         } else {
2476                 ch->colorspace = V4L2_COLORSPACE_REC709;
2477                 ch->pitch = ch->xres_virtual;
2478         }
2479
2480         ch->display.width = cfg->panel_cfg.width;
2481         ch->display.height = cfg->panel_cfg.height;
2482         ch->display.mode = *mode;
2483
2484         /* Allocate frame buffer memory. */
2485         ch->fb_size = max_size * format->bpp / 8 * 2;
2486         ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2487                                         GFP_KERNEL);
2488         if (ch->fb_mem == NULL) {
2489                 dev_err(dev, "unable to allocate buffer\n");
2490                 return -ENOMEM;
2491         }
2492
2493         /* Initialize the transmitter device if present. */
2494         if (cfg->tx_dev) {
2495                 if (!cfg->tx_dev->dev.driver ||
2496                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2497                         dev_warn(dev, "unable to get transmitter device\n");
2498                         return -EINVAL;
2499                 }
2500                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2501                 ch->tx_dev->lcdc = ch;
2502                 ch->tx_dev->def_mode = *mode;
2503         }
2504
2505         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2506 }
2507
2508 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2509 {
2510         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2511         struct sh_mobile_lcdc_priv *priv;
2512         struct resource *res;
2513         int num_channels;
2514         int error;
2515         int irq, i;
2516
2517         if (!pdata) {
2518                 dev_err(&pdev->dev, "no platform data defined\n");
2519                 return -EINVAL;
2520         }
2521
2522         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2523         irq = platform_get_irq(pdev, 0);
2524         if (!res || irq < 0) {
2525                 dev_err(&pdev->dev, "cannot get platform resources\n");
2526                 return -ENOENT;
2527         }
2528
2529         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2530         if (!priv)
2531                 return -ENOMEM;
2532
2533         priv->dev = &pdev->dev;
2534
2535         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2536                 mutex_init(&priv->ch[i].open_lock);
2537         platform_set_drvdata(pdev, priv);
2538
2539         error = request_irq(irq, sh_mobile_lcdc_irq, 0,
2540                             dev_name(&pdev->dev), priv);
2541         if (error) {
2542                 dev_err(&pdev->dev, "unable to request irq\n");
2543                 goto err1;
2544         }
2545
2546         priv->irq = irq;
2547         atomic_set(&priv->hw_usecnt, -1);
2548
2549         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2550                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2551
2552                 ch->lcdc = priv;
2553                 ch->cfg = &pdata->ch[i];
2554
2555                 error = sh_mobile_lcdc_check_interface(ch);
2556                 if (error) {
2557                         dev_err(&pdev->dev, "unsupported interface type\n");
2558                         goto err1;
2559                 }
2560                 init_waitqueue_head(&ch->frame_end_wait);
2561                 init_completion(&ch->vsync_completion);
2562
2563                 /* probe the backlight is there is one defined */
2564                 if (ch->cfg->bl_info.max_brightness)
2565                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2566
2567                 switch (pdata->ch[i].chan) {
2568                 case LCDC_CHAN_MAINLCD:
2569                         ch->enabled = LDCNT2R_ME;
2570                         ch->reg_offs = lcdc_offs_mainlcd;
2571                         num_channels++;
2572                         break;
2573                 case LCDC_CHAN_SUBLCD:
2574                         ch->enabled = LDCNT2R_SE;
2575                         ch->reg_offs = lcdc_offs_sublcd;
2576                         num_channels++;
2577                         break;
2578                 }
2579         }
2580
2581         if (!num_channels) {
2582                 dev_err(&pdev->dev, "no channels defined\n");
2583                 error = -EINVAL;
2584                 goto err1;
2585         }
2586
2587         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2588         if (num_channels == 2)
2589                 priv->forced_fourcc = pdata->ch[0].fourcc;
2590
2591         priv->base = ioremap(res->start, resource_size(res));
2592         if (!priv->base) {
2593                 error = -ENOMEM;
2594                 goto err1;
2595         }
2596
2597         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2598         if (error) {
2599                 dev_err(&pdev->dev, "unable to setup clocks\n");
2600                 goto err1;
2601         }
2602
2603         /* Enable runtime PM. */
2604         pm_runtime_enable(&pdev->dev);
2605
2606         for (i = 0; i < num_channels; i++) {
2607                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2608
2609                 error = sh_mobile_lcdc_channel_init(ch);
2610                 if (error)
2611                         goto err1;
2612         }
2613
2614         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2615                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2616
2617                 ovl->cfg = &pdata->overlays[i];
2618                 ovl->channel = &priv->ch[0];
2619
2620                 error = sh_mobile_lcdc_overlay_init(ovl);
2621                 if (error)
2622                         goto err1;
2623         }
2624
2625         error = sh_mobile_lcdc_start(priv);
2626         if (error) {
2627                 dev_err(&pdev->dev, "unable to start hardware\n");
2628                 goto err1;
2629         }
2630
2631         for (i = 0; i < num_channels; i++) {
2632                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2633
2634                 error = sh_mobile_lcdc_channel_fb_register(ch);
2635                 if (error)
2636                         goto err1;
2637         }
2638
2639         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2640                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2641
2642                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2643                 if (error)
2644                         goto err1;
2645         }
2646
2647         return 0;
2648 err1:
2649         sh_mobile_lcdc_remove(pdev);
2650
2651         return error;
2652 }
2653
2654 static struct platform_driver sh_mobile_lcdc_driver = {
2655         .driver         = {
2656                 .name           = "sh_mobile_lcdc_fb",
2657                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2658         },
2659         .probe          = sh_mobile_lcdc_probe,
2660         .remove         = sh_mobile_lcdc_remove,
2661 };
2662
2663 module_platform_driver(sh_mobile_lcdc_driver);
2664
2665 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2666 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2667 MODULE_LICENSE("GPL v2");