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/init.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/ioctl.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mm.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/slab.h>
  28 #include <linux/videodev2.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <video/sh_mobile_lcdc.h>
  32
  33 #include "sh_mobile_lcdcfb.h"
  34
  35 /* ----------------------------------------------------------------------------
  36  * Overlay register definitions
  37  */
  38
  39 #define LDBCR                   0xb00
  40 #define LDBCR_UPC(n)            (1 << ((n) + 16))
  41 #define LDBCR_UPF(n)            (1 << ((n) + 8))
  42 #define LDBCR_UPD(n)            (1 << ((n) + 0))
  43 #define LDBnBSIFR(n)            (0xb20 + (n) * 0x20 + 0x00)
  44 #define LDBBSIFR_EN             (1 << 31)
  45 #define LDBBSIFR_VS             (1 << 29)
  46 #define LDBBSIFR_BRSEL          (1 << 28)
  47 #define LDBBSIFR_MX             (1 << 27)
  48 #define LDBBSIFR_MY             (1 << 26)
  49 #define LDBBSIFR_CV3            (3 << 24)
  50 #define LDBBSIFR_CV2            (2 << 24)
  51 #define LDBBSIFR_CV1            (1 << 24)
  52 #define LDBBSIFR_CV0            (0 << 24)
  53 #define LDBBSIFR_CV_MASK        (3 << 24)
  54 #define LDBBSIFR_LAY_MASK       (0xff << 16)
  55 #define LDBBSIFR_LAY_SHIFT      16
  56 #define LDBBSIFR_ROP3_MASK      (0xff << 16)
  57 #define LDBBSIFR_ROP3_SHIFT     16
  58 #define LDBBSIFR_AL_PL8         (3 << 14)
  59 #define LDBBSIFR_AL_PL1         (2 << 14)
  60 #define LDBBSIFR_AL_PK          (1 << 14)
  61 #define LDBBSIFR_AL_1           (0 << 14)
  62 #define LDBBSIFR_AL_MASK        (3 << 14)
  63 #define LDBBSIFR_SWPL           (1 << 10)
  64 #define LDBBSIFR_SWPW           (1 << 9)
  65 #define LDBBSIFR_SWPB           (1 << 8)
  66 #define LDBBSIFR_RY             (1 << 7)
  67 #define LDBBSIFR_CHRR_420       (2 << 0)
  68 #define LDBBSIFR_CHRR_422       (1 << 0)
  69 #define LDBBSIFR_CHRR_444       (0 << 0)
  70 #define LDBBSIFR_RPKF_ARGB32    (0x00 << 0)
  71 #define LDBBSIFR_RPKF_RGB16     (0x03 << 0)
  72 #define LDBBSIFR_RPKF_RGB24     (0x0b << 0)
  73 #define LDBBSIFR_RPKF_MASK      (0x1f << 0)
  74 #define LDBnBSSZR(n)            (0xb20 + (n) * 0x20 + 0x04)
  75 #define LDBBSSZR_BVSS_MASK      (0xfff << 16)
  76 #define LDBBSSZR_BVSS_SHIFT     16
  77 #define LDBBSSZR_BHSS_MASK      (0xfff << 0)
  78 #define LDBBSSZR_BHSS_SHIFT     0
  79 #define LDBnBLOCR(n)            (0xb20 + (n) * 0x20 + 0x08)
  80 #define LDBBLOCR_CVLC_MASK      (0xfff << 16)
  81 #define LDBBLOCR_CVLC_SHIFT     16
  82 #define LDBBLOCR_CHLC_MASK      (0xfff << 0)
  83 #define LDBBLOCR_CHLC_SHIFT     0
  84 #define LDBnBSMWR(n)            (0xb20 + (n) * 0x20 + 0x0c)
  85 #define LDBBSMWR_BSMWA_MASK     (0xffff << 16)
  86 #define LDBBSMWR_BSMWA_SHIFT    16
  87 #define LDBBSMWR_BSMW_MASK      (0xffff << 0)
  88 #define LDBBSMWR_BSMW_SHIFT     0
  89 #define LDBnBSAYR(n)            (0xb20 + (n) * 0x20 + 0x10)
  90 #define LDBBSAYR_FG1A_MASK      (0xff << 24)
  91 #define LDBBSAYR_FG1A_SHIFT     24
  92 #define LDBBSAYR_FG1R_MASK      (0xff << 16)
  93 #define LDBBSAYR_FG1R_SHIFT     16
  94 #define LDBBSAYR_FG1G_MASK      (0xff << 8)
  95 #define LDBBSAYR_FG1G_SHIFT     8
  96 #define LDBBSAYR_FG1B_MASK      (0xff << 0)
  97 #define LDBBSAYR_FG1B_SHIFT     0
  98 #define LDBnBSACR(n)            (0xb20 + (n) * 0x20 + 0x14)
  99 #define LDBBSACR_FG2A_MASK      (0xff << 24)
 100 #define LDBBSACR_FG2A_SHIFT     24
 101 #define LDBBSACR_FG2R_MASK      (0xff << 16)
 102 #define LDBBSACR_FG2R_SHIFT     16
 103 #define LDBBSACR_FG2G_MASK      (0xff << 8)
 104 #define LDBBSACR_FG2G_SHIFT     8
 105 #define LDBBSACR_FG2B_MASK      (0xff << 0)
 106 #define LDBBSACR_FG2B_SHIFT     0
 107 #define LDBnBSAAR(n)            (0xb20 + (n) * 0x20 + 0x18)
 108 #define LDBBSAAR_AP_MASK        (0xff << 24)
 109 #define LDBBSAAR_AP_SHIFT       24
 110 #define LDBBSAAR_R_MASK         (0xff << 16)
 111 #define LDBBSAAR_R_SHIFT        16
 112 #define LDBBSAAR_GY_MASK        (0xff << 8)
 113 #define LDBBSAAR_GY_SHIFT       8
 114 #define LDBBSAAR_B_MASK         (0xff << 0)
 115 #define LDBBSAAR_B_SHIFT        0
 116 #define LDBnBPPCR(n)            (0xb20 + (n) * 0x20 + 0x1c)
 117 #define LDBBPPCR_AP_MASK        (0xff << 24)
 118 #define LDBBPPCR_AP_SHIFT       24
 119 #define LDBBPPCR_R_MASK         (0xff << 16)
 120 #define LDBBPPCR_R_SHIFT        16
 121 #define LDBBPPCR_GY_MASK        (0xff << 8)
 122 #define LDBBPPCR_GY_SHIFT       8
 123 #define LDBBPPCR_B_MASK         (0xff << 0)
 124 #define LDBBPPCR_B_SHIFT        0
 125 #define LDBnBBGCL(n)            (0xb10 + (n) * 0x04)
 126 #define LDBBBGCL_BGA_MASK       (0xff << 24)
 127 #define LDBBBGCL_BGA_SHIFT      24
 128 #define LDBBBGCL_BGR_MASK       (0xff << 16)
 129 #define LDBBBGCL_BGR_SHIFT      16
 130 #define LDBBBGCL_BGG_MASK       (0xff << 8)
 131 #define LDBBBGCL_BGG_SHIFT      8
 132 #define LDBBBGCL_BGB_MASK       (0xff << 0)
 133 #define LDBBBGCL_BGB_SHIFT      0
 134
 135 #define SIDE_B_OFFSET 0x1000
 136 #define MIRROR_OFFSET 0x2000
 137
 138 #define MAX_XRES 1920
 139 #define MAX_YRES 1080
 140
 141 enum sh_mobile_lcdc_overlay_mode {
 142         LCDC_OVERLAY_BLEND,
 143         LCDC_OVERLAY_ROP3,
 144 };
 145
 146 /*
 147  * struct sh_mobile_lcdc_overlay - LCDC display overlay
 148  *
 149  * @channel: LCDC channel this overlay belongs to
 150  * @cfg: Overlay configuration
 151  * @info: Frame buffer device
 152  * @index: Overlay index (0-3)
 153  * @base: Overlay registers base address
 154  * @enabled: True if the overlay is enabled
 155  * @mode: Overlay blending mode (alpha blend or ROP3)
 156  * @alpha: Global alpha blending value (0-255, for alpha blending mode)
 157  * @rop3: Raster operation (for ROP3 mode)
 158  * @fb_mem: Frame buffer virtual memory address
 159  * @fb_size: Frame buffer size in bytes
 160  * @dma_handle: Frame buffer DMA address
 161  * @base_addr_y: Overlay base address (RGB or luma component)
 162  * @base_addr_c: Overlay base address (chroma component)
 163  * @pan_y_offset: Panning linear offset in bytes (luma component)
 164  * @format: Current pixelf format
 165  * @xres: Horizontal visible resolution
 166  * @xres_virtual: Horizontal total resolution
 167  * @yres: Vertical visible resolution
 168  * @yres_virtual: Vertical total resolution
 169  * @pitch: Overlay line pitch
 170  * @pos_x: Horizontal overlay position
 171  * @pos_y: Vertical overlay position
 172  */
 173 struct sh_mobile_lcdc_overlay {
 174         struct sh_mobile_lcdc_chan *channel;
 175
 176         const struct sh_mobile_lcdc_overlay_cfg *cfg;
 177         struct fb_info *info;
 178
 179         unsigned int index;
 180         unsigned long base;
 181
 182         bool enabled;
 183         enum sh_mobile_lcdc_overlay_mode mode;
 184         unsigned int alpha;
 185         unsigned int rop3;
 186
 187         void *fb_mem;
 188         unsigned long fb_size;
 189
 190         dma_addr_t dma_handle;
 191         unsigned long base_addr_y;
 192         unsigned long base_addr_c;
 193         unsigned long pan_y_offset;
 194
 195         const struct sh_mobile_lcdc_format_info *format;
 196         unsigned int xres;
 197         unsigned int xres_virtual;
 198         unsigned int yres;
 199         unsigned int yres_virtual;
 200         unsigned int pitch;
 201         int pos_x;
 202         int pos_y;
 203 };
 204
 205 struct sh_mobile_lcdc_priv {
 206         void __iomem *base;
 207         int irq;
 208         atomic_t hw_usecnt;
 209         struct device *dev;
 210         struct clk *dot_clk;
 211         unsigned long lddckr;
 212
 213         struct sh_mobile_lcdc_chan ch[2];
 214         struct sh_mobile_lcdc_overlay overlays[4];
 215
 216         int started;
 217         int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 218 };
 219
 220 /* -----------------------------------------------------------------------------
 221  * Registers access
 222  */
 223
 224 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
 225         [LDDCKPAT1R] = 0x400,
 226         [LDDCKPAT2R] = 0x404,
 227         [LDMT1R] = 0x418,
 228         [LDMT2R] = 0x41c,
 229         [LDMT3R] = 0x420,
 230         [LDDFR] = 0x424,
 231         [LDSM1R] = 0x428,
 232         [LDSM2R] = 0x42c,
 233         [LDSA1R] = 0x430,
 234         [LDSA2R] = 0x434,
 235         [LDMLSR] = 0x438,
 236         [LDHCNR] = 0x448,
 237         [LDHSYNR] = 0x44c,
 238         [LDVLNR] = 0x450,
 239         [LDVSYNR] = 0x454,
 240         [LDPMR] = 0x460,
 241         [LDHAJR] = 0x4a0,
 242 };
 243
 244 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 245         [LDDCKPAT1R] = 0x408,
 246         [LDDCKPAT2R] = 0x40c,
 247         [LDMT1R] = 0x600,
 248         [LDMT2R] = 0x604,
 249         [LDMT3R] = 0x608,
 250         [LDDFR] = 0x60c,
 251         [LDSM1R] = 0x610,
 252         [LDSM2R] = 0x614,
 253         [LDSA1R] = 0x618,
 254         [LDMLSR] = 0x620,
 255         [LDHCNR] = 0x624,
 256         [LDHSYNR] = 0x628,
 257         [LDVLNR] = 0x62c,
 258         [LDVSYNR] = 0x630,
 259         [LDPMR] = 0x63c,
 260 };
 261
 262 static bool banked(int reg_nr)
 263 {
 264         switch (reg_nr) {
 265         case LDMT1R:
 266         case LDMT2R:
 267         case LDMT3R:
 268         case LDDFR:
 269         case LDSM1R:
 270         case LDSA1R:
 271         case LDSA2R:
 272         case LDMLSR:
 273         case LDHCNR:
 274         case LDHSYNR:
 275         case LDVLNR:
 276         case LDVSYNR:
 277                 return true;
 278         }
 279         return false;
 280 }
 281
 282 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 283 {
 284         return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 285 }
 286
 287 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 288                             int reg_nr, unsigned long data)
 289 {
 290         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 291         if (banked(reg_nr))
 292                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 293                           SIDE_B_OFFSET);
 294 }
 295
 296 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 297                             int reg_nr, unsigned long data)
 298 {
 299         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 300                   MIRROR_OFFSET);
 301 }
 302
 303 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 304                                     int reg_nr)
 305 {
 306         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 307 }
 308
 309 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
 310                                int reg, unsigned long data)
 311 {
 312         iowrite32(data, ovl->channel->lcdc->base + reg);
 313         iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
 314 }
 315
 316 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 317                        unsigned long reg_offs, unsigned long data)
 318 {
 319         iowrite32(data, priv->base + reg_offs);
 320 }
 321
 322 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 323                                unsigned long reg_offs)
 324 {
 325         return ioread32(priv->base + reg_offs);
 326 }
 327
 328 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 329                           unsigned long reg_offs,
 330                           unsigned long mask, unsigned long until)
 331 {
 332         while ((lcdc_read(priv, reg_offs) & mask) != until)
 333                 cpu_relax();
 334 }
 335
 336 /* -----------------------------------------------------------------------------
 337  * Clock management
 338  */
 339
 340 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 341 {
 342         if (atomic_inc_and_test(&priv->hw_usecnt)) {
 343                 clk_prepare_enable(priv->dot_clk);
 344                 pm_runtime_get_sync(priv->dev);
 345         }
 346 }
 347
 348 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 349 {
 350         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 351                 pm_runtime_put(priv->dev);
 352                 clk_disable_unprepare(priv->dot_clk);
 353         }
 354 }
 355
 356 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 357                                        int clock_source)
 358 {
 359         struct clk *clk;
 360         char *str;
 361
 362         switch (clock_source) {
 363         case LCDC_CLK_BUS:
 364                 str = "bus_clk";
 365                 priv->lddckr = LDDCKR_ICKSEL_BUS;
 366                 break;
 367         case LCDC_CLK_PERIPHERAL:
 368                 str = "peripheral_clk";
 369                 priv->lddckr = LDDCKR_ICKSEL_MIPI;
 370                 break;
 371         case LCDC_CLK_EXTERNAL:
 372                 str = NULL;
 373                 priv->lddckr = LDDCKR_ICKSEL_HDMI;
 374                 break;
 375         default:
 376                 return -EINVAL;
 377         }
 378
 379         if (str == NULL)
 380                 return 0;
 381
 382         clk = clk_get(priv->dev, str);
 383         if (IS_ERR(clk)) {
 384                 dev_err(priv->dev, "cannot get dot clock %s\n", str);
 385                 return PTR_ERR(clk);
 386         }
 387
 388         priv->dot_clk = clk;
 389         return 0;
 390 }
 391
 392 /* -----------------------------------------------------------------------------
 393  * Display, panel and deferred I/O
 394  */
 395
 396 static void lcdc_sys_write_index(void *handle, unsigned long data)
 397 {
 398         struct sh_mobile_lcdc_chan *ch = handle;
 399
 400         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 401         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 402         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 403                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 404         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 405 }
 406
 407 static void lcdc_sys_write_data(void *handle, unsigned long data)
 408 {
 409         struct sh_mobile_lcdc_chan *ch = handle;
 410
 411         lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 412         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 413         lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 414                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 415         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 416 }
 417
 418 static unsigned long lcdc_sys_read_data(void *handle)
 419 {
 420         struct sh_mobile_lcdc_chan *ch = handle;
 421
 422         lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 423         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 424         lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 425                    (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 426         udelay(1);
 427         lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 428
 429         return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 430 }
 431
 432 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 433         .write_index    = lcdc_sys_write_index,
 434         .write_data     = lcdc_sys_write_data,
 435         .read_data      = lcdc_sys_read_data,
 436 };
 437
 438 static int sh_mobile_lcdc_sginit(struct fb_info *info, struct list_head *pagereflist)
 439 {
 440         struct sh_mobile_lcdc_chan *ch = info->par;
 441         unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 442         struct fb_deferred_io_pageref *pageref;
 443         int nr_pages = 0;
 444
 445         sg_init_table(ch->sglist, nr_pages_max);
 446
 447         list_for_each_entry(pageref, pagereflist, list) {
 448                 sg_set_page(&ch->sglist[nr_pages++], pageref->page, PAGE_SIZE, 0);
 449         }
 450
 451         return nr_pages;
 452 }
 453
 454 static void sh_mobile_lcdc_deferred_io(struct fb_info *info, struct list_head *pagereflist)
 455 {
 456         struct sh_mobile_lcdc_chan *ch = info->par;
 457         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 458
 459         /* enable clocks before accessing hardware */
 460         sh_mobile_lcdc_clk_on(ch->lcdc);
 461
 462         /*
 463          * It's possible to get here without anything on the pagereflist via
 464          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 465          * invocation. In the former case, the acceleration routines are
 466          * stepped in to when using the framebuffer console causing the
 467          * workqueue to be scheduled without any dirty pages on the list.
 468          *
 469          * Despite this, a panel update is still needed given that the
 470          * acceleration routines have their own methods for writing in
 471          * that still need to be updated.
 472          *
 473          * The fsync() and empty pagereflist case could be optimized for,
 474          * but we don't bother, as any application exhibiting such
 475          * behaviour is fundamentally broken anyways.
 476          */
 477         if (!list_empty(pagereflist)) {
 478                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagereflist);
 479
 480                 /* trigger panel update */
 481                 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 482                 if (panel->start_transfer)
 483                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 484                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 485                 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 486                              DMA_TO_DEVICE);
 487         } else {
 488                 if (panel->start_transfer)
 489                         panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 490                 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 491         }
 492 }
 493
 494 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 495 {
 496         struct fb_deferred_io *fbdefio = info->fbdefio;
 497
 498         if (fbdefio)
 499                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 500 }
 501
 502 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 503 {
 504         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 505
 506         if (ch->tx_dev) {
 507                 int ret;
 508
 509                 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 510                 if (ret < 0)
 511                         return;
 512
 513                 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 514                         ch->info->state = FBINFO_STATE_SUSPENDED;
 515         }
 516
 517         /* HDMI must be enabled before LCDC configuration */
 518         if (panel->display_on)
 519                 panel->display_on();
 520 }
 521
 522 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 523 {
 524         const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 525
 526         if (panel->display_off)
 527                 panel->display_off();
 528
 529         if (ch->tx_dev)
 530                 ch->tx_dev->ops->display_off(ch->tx_dev);
 531 }
 532
 533 /* -----------------------------------------------------------------------------
 534  * Format helpers
 535  */
 536
 537 struct sh_mobile_lcdc_format_info {
 538         u32 fourcc;
 539         unsigned int bpp;
 540         bool yuv;
 541         u32 lddfr;
 542 };
 543
 544 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 545         {
 546                 .fourcc = V4L2_PIX_FMT_RGB565,
 547                 .bpp = 16,
 548                 .yuv = false,
 549                 .lddfr = LDDFR_PKF_RGB16,
 550         }, {
 551                 .fourcc = V4L2_PIX_FMT_BGR24,
 552                 .bpp = 24,
 553                 .yuv = false,
 554                 .lddfr = LDDFR_PKF_RGB24,
 555         }, {
 556                 .fourcc = V4L2_PIX_FMT_BGR32,
 557                 .bpp = 32,
 558                 .yuv = false,
 559                 .lddfr = LDDFR_PKF_ARGB32,
 560         }, {
 561                 .fourcc = V4L2_PIX_FMT_NV12,
 562                 .bpp = 12,
 563                 .yuv = true,
 564                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 565         }, {
 566                 .fourcc = V4L2_PIX_FMT_NV21,
 567                 .bpp = 12,
 568                 .yuv = true,
 569                 .lddfr = LDDFR_CC | LDDFR_YF_420,
 570         }, {
 571                 .fourcc = V4L2_PIX_FMT_NV16,
 572                 .bpp = 16,
 573                 .yuv = true,
 574                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 575         }, {
 576                 .fourcc = V4L2_PIX_FMT_NV61,
 577                 .bpp = 16,
 578                 .yuv = true,
 579                 .lddfr = LDDFR_CC | LDDFR_YF_422,
 580         }, {
 581                 .fourcc = V4L2_PIX_FMT_NV24,
 582                 .bpp = 24,
 583                 .yuv = true,
 584                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 585         }, {
 586                 .fourcc = V4L2_PIX_FMT_NV42,
 587                 .bpp = 24,
 588                 .yuv = true,
 589                 .lddfr = LDDFR_CC | LDDFR_YF_444,
 590         },
 591 };
 592
 593 static const struct sh_mobile_lcdc_format_info *
 594 sh_mobile_format_info(u32 fourcc)
 595 {
 596         unsigned int i;
 597
 598         for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 599                 if (sh_mobile_format_infos[i].fourcc == fourcc)
 600                         return &sh_mobile_format_infos[i];
 601         }
 602
 603         return NULL;
 604 }
 605
 606 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 607 {
 608         if (var->grayscale > 1)
 609                 return var->grayscale;
 610
 611         switch (var->bits_per_pixel) {
 612         case 16:
 613                 return V4L2_PIX_FMT_RGB565;
 614         case 24:
 615                 return V4L2_PIX_FMT_BGR24;
 616         case 32:
 617                 return V4L2_PIX_FMT_BGR32;
 618         default:
 619                 return 0;
 620         }
 621 }
 622
 623 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 624 {
 625         return var->grayscale > 1;
 626 }
 627
 628 /* -----------------------------------------------------------------------------
 629  * Start, stop and IRQ
 630  */
 631
 632 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 633 {
 634         struct sh_mobile_lcdc_priv *priv = data;
 635         struct sh_mobile_lcdc_chan *ch;
 636         unsigned long ldintr;
 637         int is_sub;
 638         int k;
 639
 640         /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 641         ldintr = lcdc_read(priv, _LDINTR);
 642         lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 643
 644         /* figure out if this interrupt is for main or sub lcd */
 645         is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 646
 647         /* wake up channel and disable clocks */
 648         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 649                 ch = &priv->ch[k];
 650
 651                 if (!ch->enabled)
 652                         continue;
 653
 654                 /* Frame End */
 655                 if (ldintr & LDINTR_FS) {
 656                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
 657                                 ch->frame_end = 1;
 658                                 wake_up(&ch->frame_end_wait);
 659
 660                                 sh_mobile_lcdc_clk_off(priv);
 661                         }
 662                 }
 663
 664                 /* VSYNC End */
 665                 if (ldintr & LDINTR_VES)
 666                         complete(&ch->vsync_completion);
 667         }
 668
 669         return IRQ_HANDLED;
 670 }
 671
 672 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 673 {
 674         unsigned long ldintr;
 675         int ret;
 676
 677         /* Enable VSync End interrupt and be careful not to acknowledge any
 678          * pending interrupt.
 679          */
 680         ldintr = lcdc_read(ch->lcdc, _LDINTR);
 681         ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 682         lcdc_write(ch->lcdc, _LDINTR, ldintr);
 683
 684         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 685                                                         msecs_to_jiffies(100));
 686         if (!ret)
 687                 return -ETIMEDOUT;
 688
 689         return 0;
 690 }
 691
 692 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 693                                       int start)
 694 {
 695         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 696         int k;
 697
 698         /* start or stop the lcdc */
 699         if (start)
 700                 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 701         else
 702                 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 703
 704         /* wait until power is applied/stopped on all channels */
 705         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 706                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 707                         while (1) {
 708                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 709                                     & LDPMR_LPS;
 710                                 if (start && tmp == LDPMR_LPS)
 711                                         break;
 712                                 if (!start && tmp == 0)
 713                                         break;
 714                                 cpu_relax();
 715                         }
 716
 717         if (!start)
 718                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 719 }
 720
 721 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 722 {
 723         const struct fb_var_screeninfo *var = &ch->info->var;
 724         const struct fb_videomode *mode = &ch->display.mode;
 725         unsigned long h_total, hsync_pos, display_h_total;
 726         u32 tmp;
 727
 728         tmp = ch->ldmt1r_value;
 729         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 730         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 731         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 732         tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 733         tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 734         tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 735         tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 736         lcdc_write_chan(ch, LDMT1R, tmp);
 737
 738         /* setup SYS bus */
 739         lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 740         lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 741
 742         /* horizontal configuration */
 743         h_total = mode->xres + mode->hsync_len + mode->left_margin
 744                 + mode->right_margin;
 745         tmp = h_total / 8; /* HTCN */
 746         tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 747         lcdc_write_chan(ch, LDHCNR, tmp);
 748
 749         hsync_pos = mode->xres + mode->right_margin;
 750         tmp = hsync_pos / 8; /* HSYNP */
 751         tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 752         lcdc_write_chan(ch, LDHSYNR, tmp);
 753
 754         /* vertical configuration */
 755         tmp = mode->yres + mode->vsync_len + mode->upper_margin
 756             + mode->lower_margin; /* VTLN */
 757         tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 758         lcdc_write_chan(ch, LDVLNR, tmp);
 759
 760         tmp = mode->yres + mode->lower_margin; /* VSYNP */
 761         tmp |= mode->vsync_len << 16; /* VSYNW */
 762         lcdc_write_chan(ch, LDVSYNR, tmp);
 763
 764         /* Adjust horizontal synchronisation for HDMI */
 765         display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 766                         + mode->right_margin;
 767         tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 768             | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 769         lcdc_write_chan(ch, LDHAJR, tmp);
 770         lcdc_write_chan_mirror(ch, LDHAJR, tmp);
 771 }
 772
 773 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 774 {
 775         u32 format = 0;
 776
 777         if (!ovl->enabled) {
 778                 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 779                 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 780                 lcdc_write(ovl->channel->lcdc, LDBCR,
 781                            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 782                 return;
 783         }
 784
 785         ovl->base_addr_y = ovl->dma_handle;
 786         ovl->base_addr_c = ovl->dma_handle
 787                          + ovl->xres_virtual * ovl->yres_virtual;
 788
 789         switch (ovl->mode) {
 790         case LCDC_OVERLAY_BLEND:
 791                 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 792                 break;
 793
 794         case LCDC_OVERLAY_ROP3:
 795                 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 796                        | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 797                 break;
 798         }
 799
 800         switch (ovl->format->fourcc) {
 801         case V4L2_PIX_FMT_RGB565:
 802         case V4L2_PIX_FMT_NV21:
 803         case V4L2_PIX_FMT_NV61:
 804         case V4L2_PIX_FMT_NV42:
 805                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 806                 break;
 807         case V4L2_PIX_FMT_BGR24:
 808         case V4L2_PIX_FMT_NV12:
 809         case V4L2_PIX_FMT_NV16:
 810         case V4L2_PIX_FMT_NV24:
 811                 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 812                 break;
 813         case V4L2_PIX_FMT_BGR32:
 814         default:
 815                 format |= LDBBSIFR_SWPL;
 816                 break;
 817         }
 818
 819         switch (ovl->format->fourcc) {
 820         case V4L2_PIX_FMT_RGB565:
 821                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 822                 break;
 823         case V4L2_PIX_FMT_BGR24:
 824                 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 825                 break;
 826         case V4L2_PIX_FMT_BGR32:
 827                 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDBBSIFR_RPKF_ARGB32;
 828                 break;
 829         case V4L2_PIX_FMT_NV12:
 830         case V4L2_PIX_FMT_NV21:
 831                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 832                 break;
 833         case V4L2_PIX_FMT_NV16:
 834         case V4L2_PIX_FMT_NV61:
 835                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 836                 break;
 837         case V4L2_PIX_FMT_NV24:
 838         case V4L2_PIX_FMT_NV42:
 839                 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 840                 break;
 841         }
 842
 843         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 844
 845         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 846
 847         lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 848                 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 849                 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 850         lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 851                 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 852                 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 853         lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 854                 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 855
 856         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 857         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 858
 859         lcdc_write(ovl->channel->lcdc, LDBCR,
 860                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 861 }
 862
 863 /*
 864  * __sh_mobile_lcdc_start - Configure and start the LCDC
 865  * @priv: LCDC device
 866  *
 867  * Configure all enabled channels and start the LCDC device. All external
 868  * devices (clocks, MERAM, panels, ...) are not touched by this function.
 869  */
 870 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 871 {
 872         struct sh_mobile_lcdc_chan *ch;
 873         unsigned long tmp;
 874         int k, m;
 875
 876         /* Enable LCDC channels. Read data from external memory, avoid using the
 877          * BEU for now.
 878          */
 879         lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 880
 881         /* Stop the LCDC first and disable all interrupts. */
 882         sh_mobile_lcdc_start_stop(priv, 0);
 883         lcdc_write(priv, _LDINTR, 0);
 884
 885         /* Configure power supply, dot clocks and start them. */
 886         tmp = priv->lddckr;
 887         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 888                 ch = &priv->ch[k];
 889                 if (!ch->enabled)
 890                         continue;
 891
 892                 /* Power supply */
 893                 lcdc_write_chan(ch, LDPMR, 0);
 894
 895                 m = ch->cfg->clock_divider;
 896                 if (!m)
 897                         continue;
 898
 899                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 900                  * denominator.
 901                  */
 902                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
 903                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 904
 905                 if (m == 1)
 906                         m = LDDCKR_MOSEL;
 907                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 908         }
 909
 910         lcdc_write(priv, _LDDCKR, tmp);
 911         lcdc_write(priv, _LDDCKSTPR, 0);
 912         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
 913
 914         /* Setup geometry, format, frame buffer memory and operation mode. */
 915         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 916                 ch = &priv->ch[k];
 917                 if (!ch->enabled)
 918                         continue;
 919
 920                 sh_mobile_lcdc_geometry(ch);
 921
 922                 tmp = ch->format->lddfr;
 923
 924                 if (ch->format->yuv) {
 925                         switch (ch->colorspace) {
 926                         case V4L2_COLORSPACE_REC709:
 927                                 tmp |= LDDFR_CF1;
 928                                 break;
 929                         case V4L2_COLORSPACE_JPEG:
 930                                 tmp |= LDDFR_CF0;
 931                                 break;
 932                         }
 933                 }
 934
 935                 lcdc_write_chan(ch, LDDFR, tmp);
 936                 lcdc_write_chan(ch, LDMLSR, ch->line_size);
 937                 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
 938                 if (ch->format->yuv)
 939                         lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
 940
 941                 /* When using deferred I/O mode, configure the LCDC for one-shot
 942                  * operation and enable the frame end interrupt. Otherwise use
 943                  * continuous read mode.
 944                  */
 945                 if (ch->ldmt1r_value & LDMT1R_IFM &&
 946                     ch->cfg->sys_bus_cfg.deferred_io_msec) {
 947                         lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
 948                         lcdc_write(priv, _LDINTR, LDINTR_FE);
 949                 } else {
 950                         lcdc_write_chan(ch, LDSM1R, 0);
 951                 }
 952         }
 953
 954         /* Word and long word swap. */
 955         switch (priv->ch[0].format->fourcc) {
 956         case V4L2_PIX_FMT_RGB565:
 957         case V4L2_PIX_FMT_NV21:
 958         case V4L2_PIX_FMT_NV61:
 959         case V4L2_PIX_FMT_NV42:
 960                 tmp = LDDDSR_LS | LDDDSR_WS;
 961                 break;
 962         case V4L2_PIX_FMT_BGR24:
 963         case V4L2_PIX_FMT_NV12:
 964         case V4L2_PIX_FMT_NV16:
 965         case V4L2_PIX_FMT_NV24:
 966                 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
 967                 break;
 968         case V4L2_PIX_FMT_BGR32:
 969         default:
 970                 tmp = LDDDSR_LS;
 971                 break;
 972         }
 973         lcdc_write(priv, _LDDDSR, tmp);
 974
 975         /* Enable the display output. */
 976         lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
 977         sh_mobile_lcdc_start_stop(priv, 1);
 978         priv->started = 1;
 979 }
 980
 981 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 982 {
 983         struct sh_mobile_lcdc_chan *ch;
 984         unsigned long tmp;
 985         int ret;
 986         int k;
 987
 988         /* enable clocks before accessing the hardware */
 989         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 990                 if (priv->ch[k].enabled)
 991                         sh_mobile_lcdc_clk_on(priv);
 992         }
 993
 994         /* reset */
 995         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
 996         lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
 997
 998         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 999                 const struct sh_mobile_lcdc_panel_cfg *panel;
1000
1001                 ch = &priv->ch[k];
1002                 if (!ch->enabled)
1003                         continue;
1004
1005                 panel = &ch->cfg->panel_cfg;
1006                 if (panel->setup_sys) {
1007                         ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1008                         if (ret)
1009                                 return ret;
1010                 }
1011         }
1012
1013         /* Compute frame buffer base address and pitch for each channel. */
1014         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1015                 ch = &priv->ch[k];
1016                 if (!ch->enabled)
1017                         continue;
1018
1019                 ch->base_addr_y = ch->dma_handle;
1020                 ch->base_addr_c = ch->dma_handle
1021                                 + ch->xres_virtual * ch->yres_virtual;
1022                 ch->line_size = ch->pitch;
1023         }
1024
1025         for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1026                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1027                 sh_mobile_lcdc_overlay_setup(ovl);
1028         }
1029
1030         /* Start the LCDC. */
1031         __sh_mobile_lcdc_start(priv);
1032
1033         /* Setup deferred I/O, tell the board code to enable the panels, and
1034          * turn backlight on.
1035          */
1036         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1037                 ch = &priv->ch[k];
1038                 if (!ch->enabled)
1039                         continue;
1040
1041                 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1042                 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1043                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1044                         ch->defio.delay = msecs_to_jiffies(tmp);
1045                         ch->info->fbdefio = &ch->defio;
1046                         fb_deferred_io_init(ch->info);
1047                 }
1048
1049                 sh_mobile_lcdc_display_on(ch);
1050
1051                 if (ch->bl) {
1052                         ch->bl->props.power = FB_BLANK_UNBLANK;
1053                         backlight_update_status(ch->bl);
1054                 }
1055         }
1056
1057         return 0;
1058 }
1059
1060 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1061 {
1062         struct sh_mobile_lcdc_chan *ch;
1063         int k;
1064
1065         /* clean up deferred io and ask board code to disable panel */
1066         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1067                 ch = &priv->ch[k];
1068                 if (!ch->enabled)
1069                         continue;
1070
1071                 /* deferred io mode:
1072                  * flush frame, and wait for frame end interrupt
1073                  * clean up deferred io and enable clock
1074                  */
1075                 if (ch->info && ch->info->fbdefio) {
1076                         ch->frame_end = 0;
1077                         schedule_delayed_work(&ch->info->deferred_work, 0);
1078                         wait_event(ch->frame_end_wait, ch->frame_end);
1079                         fb_deferred_io_cleanup(ch->info);
1080                         ch->info->fbdefio = NULL;
1081                         sh_mobile_lcdc_clk_on(priv);
1082                 }
1083
1084                 if (ch->bl) {
1085                         ch->bl->props.power = FB_BLANK_POWERDOWN;
1086                         backlight_update_status(ch->bl);
1087                 }
1088
1089                 sh_mobile_lcdc_display_off(ch);
1090         }
1091
1092         /* stop the lcdc */
1093         if (priv->started) {
1094                 sh_mobile_lcdc_start_stop(priv, 0);
1095                 priv->started = 0;
1096         }
1097
1098         /* stop clocks */
1099         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1100                 if (priv->ch[k].enabled)
1101                         sh_mobile_lcdc_clk_off(priv);
1102 }
1103
1104 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1105                                       struct fb_info *info)
1106 {
1107         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1108                 return -EINVAL;
1109
1110         /* Make sure the virtual resolution is at least as big as the visible
1111          * resolution.
1112          */
1113         if (var->xres_virtual < var->xres)
1114                 var->xres_virtual = var->xres;
1115         if (var->yres_virtual < var->yres)
1116                 var->yres_virtual = var->yres;
1117
1118         if (sh_mobile_format_is_fourcc(var)) {
1119                 const struct sh_mobile_lcdc_format_info *format;
1120
1121                 format = sh_mobile_format_info(var->grayscale);
1122                 if (format == NULL)
1123                         return -EINVAL;
1124                 var->bits_per_pixel = format->bpp;
1125
1126                 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1127                  * respectively.
1128                  */
1129                 if (!format->yuv)
1130                         var->colorspace = V4L2_COLORSPACE_SRGB;
1131                 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1132                         var->colorspace = V4L2_COLORSPACE_JPEG;
1133         } else {
1134                 if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1135                         var->bits_per_pixel = 16;
1136                         var->red.offset = 11;
1137                         var->red.length = 5;
1138                         var->green.offset = 5;
1139                         var->green.length = 6;
1140                         var->blue.offset = 0;
1141                         var->blue.length = 5;
1142                         var->transp.offset = 0;
1143                         var->transp.length = 0;
1144                 } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1145                         var->bits_per_pixel = 24;
1146                         var->red.offset = 16;
1147                         var->red.length = 8;
1148                         var->green.offset = 8;
1149                         var->green.length = 8;
1150                         var->blue.offset = 0;
1151                         var->blue.length = 8;
1152                         var->transp.offset = 0;
1153                         var->transp.length = 0;
1154                 } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1155                         var->bits_per_pixel = 32;
1156                         var->red.offset = 16;
1157                         var->red.length = 8;
1158                         var->green.offset = 8;
1159                         var->green.length = 8;
1160                         var->blue.offset = 0;
1161                         var->blue.length = 8;
1162                         var->transp.offset = 24;
1163                         var->transp.length = 8;
1164                 } else
1165                         return -EINVAL;
1166
1167                 var->red.msb_right = 0;
1168                 var->green.msb_right = 0;
1169                 var->blue.msb_right = 0;
1170                 var->transp.msb_right = 0;
1171         }
1172
1173         /* Make sure we don't exceed our allocated memory. */
1174         if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1175             info->fix.smem_len)
1176                 return -EINVAL;
1177
1178         return 0;
1179 }
1180
1181 /* -----------------------------------------------------------------------------
1182  * Frame buffer operations - Overlays
1183  */
1184
1185 static ssize_t
1186 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1187 {
1188         struct fb_info *info = dev_get_drvdata(dev);
1189         struct sh_mobile_lcdc_overlay *ovl = info->par;
1190
1191         return sysfs_emit(buf, "%u\n", ovl->alpha);
1192 }
1193
1194 static ssize_t
1195 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1196                     const char *buf, size_t count)
1197 {
1198         struct fb_info *info = dev_get_drvdata(dev);
1199         struct sh_mobile_lcdc_overlay *ovl = info->par;
1200         unsigned int alpha;
1201         char *endp;
1202
1203         alpha = simple_strtoul(buf, &endp, 10);
1204         if (isspace(*endp))
1205                 endp++;
1206
1207         if (endp - buf != count)
1208                 return -EINVAL;
1209
1210         if (alpha > 255)
1211                 return -EINVAL;
1212
1213         if (ovl->alpha != alpha) {
1214                 ovl->alpha = alpha;
1215
1216                 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1217                         sh_mobile_lcdc_overlay_setup(ovl);
1218         }
1219
1220         return count;
1221 }
1222
1223 static ssize_t
1224 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1225 {
1226         struct fb_info *info = dev_get_drvdata(dev);
1227         struct sh_mobile_lcdc_overlay *ovl = info->par;
1228
1229         return sysfs_emit(buf, "%u\n", ovl->mode);
1230 }
1231
1232 static ssize_t
1233 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1234                    const char *buf, size_t count)
1235 {
1236         struct fb_info *info = dev_get_drvdata(dev);
1237         struct sh_mobile_lcdc_overlay *ovl = info->par;
1238         unsigned int mode;
1239         char *endp;
1240
1241         mode = simple_strtoul(buf, &endp, 10);
1242         if (isspace(*endp))
1243                 endp++;
1244
1245         if (endp - buf != count)
1246                 return -EINVAL;
1247
1248         if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1249                 return -EINVAL;
1250
1251         if (ovl->mode != mode) {
1252                 ovl->mode = mode;
1253
1254                 if (ovl->enabled)
1255                         sh_mobile_lcdc_overlay_setup(ovl);
1256         }
1257
1258         return count;
1259 }
1260
1261 static ssize_t
1262 overlay_position_show(struct device *dev, struct device_attribute *attr,
1263                       char *buf)
1264 {
1265         struct fb_info *info = dev_get_drvdata(dev);
1266         struct sh_mobile_lcdc_overlay *ovl = info->par;
1267
1268         return sysfs_emit(buf, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1269 }
1270
1271 static ssize_t
1272 overlay_position_store(struct device *dev, struct device_attribute *attr,
1273                        const char *buf, size_t count)
1274 {
1275         struct fb_info *info = dev_get_drvdata(dev);
1276         struct sh_mobile_lcdc_overlay *ovl = info->par;
1277         char *endp;
1278         int pos_x;
1279         int pos_y;
1280
1281         pos_x = simple_strtol(buf, &endp, 10);
1282         if (*endp != ',')
1283                 return -EINVAL;
1284
1285         pos_y = simple_strtol(endp + 1, &endp, 10);
1286         if (isspace(*endp))
1287                 endp++;
1288
1289         if (endp - buf != count)
1290                 return -EINVAL;
1291
1292         if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1293                 ovl->pos_x = pos_x;
1294                 ovl->pos_y = pos_y;
1295
1296                 if (ovl->enabled)
1297                         sh_mobile_lcdc_overlay_setup(ovl);
1298         }
1299
1300         return count;
1301 }
1302
1303 static ssize_t
1304 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1305 {
1306         struct fb_info *info = dev_get_drvdata(dev);
1307         struct sh_mobile_lcdc_overlay *ovl = info->par;
1308
1309         return sysfs_emit(buf, "%u\n", ovl->rop3);
1310 }
1311
1312 static ssize_t
1313 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1314                     const char *buf, size_t count)
1315 {
1316         struct fb_info *info = dev_get_drvdata(dev);
1317         struct sh_mobile_lcdc_overlay *ovl = info->par;
1318         unsigned int rop3;
1319         char *endp;
1320
1321         rop3 = simple_strtoul(buf, &endp, 10);
1322         if (isspace(*endp))
1323                 endp++;
1324
1325         if (endp - buf != count)
1326                 return -EINVAL;
1327
1328         if (rop3 > 255)
1329                 return -EINVAL;
1330
1331         if (ovl->rop3 != rop3) {
1332                 ovl->rop3 = rop3;
1333
1334                 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1335                         sh_mobile_lcdc_overlay_setup(ovl);
1336         }
1337
1338         return count;
1339 }
1340
1341 static const struct device_attribute overlay_sysfs_attrs[] = {
1342         __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1343                overlay_alpha_show, overlay_alpha_store),
1344         __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1345                overlay_mode_show, overlay_mode_store),
1346         __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1347                overlay_position_show, overlay_position_store),
1348         __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1349                overlay_rop3_show, overlay_rop3_store),
1350 };
1351
1352 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1353         .id =           "SH Mobile LCDC",
1354         .type =         FB_TYPE_PACKED_PIXELS,
1355         .visual =       FB_VISUAL_TRUECOLOR,
1356         .accel =        FB_ACCEL_NONE,
1357         .xpanstep =     1,
1358         .ypanstep =     1,
1359         .ywrapstep =    0,
1360         .capabilities = FB_CAP_FOURCC,
1361 };
1362
1363 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1364                                     struct fb_info *info)
1365 {
1366         struct sh_mobile_lcdc_overlay *ovl = info->par;
1367         unsigned long base_addr_y;
1368         unsigned long base_addr_c;
1369         unsigned long y_offset;
1370         unsigned long c_offset;
1371
1372         if (!ovl->format->yuv) {
1373                 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1374                          * ovl->format->bpp / 8;
1375                 c_offset = 0;
1376         } else {
1377                 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1378                 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1379
1380                 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1381                 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1382                          + var->xoffset * 2 / xsub;
1383         }
1384
1385         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1386          * nothing to do in that case.
1387          */
1388         if (y_offset == ovl->pan_y_offset)
1389                 return 0;
1390
1391         /* Set the source address for the next refresh */
1392         base_addr_y = ovl->dma_handle + y_offset;
1393         base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1394                     + c_offset;
1395
1396         ovl->base_addr_y = base_addr_y;
1397         ovl->base_addr_c = base_addr_c;
1398         ovl->pan_y_offset = y_offset;
1399
1400         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1401
1402         lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1403         lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1404
1405         lcdc_write(ovl->channel->lcdc, LDBCR,
1406                    LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1407
1408         return 0;
1409 }
1410
1411 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1412                                       unsigned long arg)
1413 {
1414         struct sh_mobile_lcdc_overlay *ovl = info->par;
1415
1416         switch (cmd) {
1417         case FBIO_WAITFORVSYNC:
1418                 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1419
1420         default:
1421                 return -ENOIOCTLCMD;
1422         }
1423 }
1424
1425 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1426                                           struct fb_info *info)
1427 {
1428         return __sh_mobile_lcdc_check_var(var, info);
1429 }
1430
1431 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1432 {
1433         struct sh_mobile_lcdc_overlay *ovl = info->par;
1434
1435         ovl->format =
1436                 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1437
1438         ovl->xres = info->var.xres;
1439         ovl->xres_virtual = info->var.xres_virtual;
1440         ovl->yres = info->var.yres;
1441         ovl->yres_virtual = info->var.yres_virtual;
1442
1443         if (ovl->format->yuv)
1444                 ovl->pitch = info->var.xres_virtual;
1445         else
1446                 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1447
1448         sh_mobile_lcdc_overlay_setup(ovl);
1449
1450         info->fix.line_length = ovl->pitch;
1451
1452         if (sh_mobile_format_is_fourcc(&info->var)) {
1453                 info->fix.type = FB_TYPE_FOURCC;
1454                 info->fix.visual = FB_VISUAL_FOURCC;
1455         } else {
1456                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1457                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1458         }
1459
1460         return 0;
1461 }
1462
1463 /* Overlay blanking. Disable the overlay when blanked. */
1464 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1465 {
1466         struct sh_mobile_lcdc_overlay *ovl = info->par;
1467
1468         ovl->enabled = !blank;
1469         sh_mobile_lcdc_overlay_setup(ovl);
1470
1471         /* Prevent the backlight from receiving a blanking event by returning
1472          * a non-zero value.
1473          */
1474         return 1;
1475 }
1476
1477 static int
1478 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1479 {
1480         struct sh_mobile_lcdc_overlay *ovl = info->par;
1481
1482         if (info->fbdefio)
1483                 return fb_deferred_io_mmap(info, vma);
1484
1485         vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1486
1487         return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1488                                  ovl->dma_handle, ovl->fb_size);
1489 }
1490
1491 static const struct fb_ops sh_mobile_lcdc_overlay_ops = {
1492         .owner          = THIS_MODULE,
1493         __FB_DEFAULT_DMAMEM_OPS_RDWR,
1494         .fb_blank       = sh_mobile_lcdc_overlay_blank,
1495         .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1496         __FB_DEFAULT_DMAMEM_OPS_DRAW,
1497         .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1498         .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1499         .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1500         .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1501 };
1502
1503 static void
1504 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1505 {
1506         struct fb_info *info = ovl->info;
1507
1508         if (info == NULL || info->dev == NULL)
1509                 return;
1510
1511         unregister_framebuffer(ovl->info);
1512 }
1513
1514 static int
1515 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1516 {
1517         struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1518         struct fb_info *info = ovl->info;
1519         unsigned int i;
1520         int ret;
1521
1522         if (info == NULL)
1523                 return 0;
1524
1525         ret = register_framebuffer(info);
1526         if (ret < 0)
1527                 return ret;
1528
1529         dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1530                  dev_name(lcdc->dev), ovl->index, info->var.xres,
1531                  info->var.yres, info->var.bits_per_pixel);
1532
1533         for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1534                 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1535                 if (ret < 0)
1536                         return ret;
1537         }
1538
1539         return 0;
1540 }
1541
1542 static void
1543 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1544 {
1545         struct fb_info *info = ovl->info;
1546
1547         if (info == NULL || info->device == NULL)
1548                 return;
1549
1550         framebuffer_release(info);
1551 }
1552
1553 static int
1554 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1555 {
1556         struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1557         struct fb_var_screeninfo *var;
1558         struct fb_info *info;
1559
1560         /* Allocate and initialize the frame buffer device. */
1561         info = framebuffer_alloc(0, priv->dev);
1562         if (!info)
1563                 return -ENOMEM;
1564
1565         ovl->info = info;
1566
1567         info->fbops = &sh_mobile_lcdc_overlay_ops;
1568         info->device = priv->dev;
1569         info->flags |= FBINFO_VIRTFB;
1570         info->screen_buffer = ovl->fb_mem;
1571         info->par = ovl;
1572
1573         /* Initialize fixed screen information. Restrict pan to 2 lines steps
1574          * for NV12 and NV21.
1575          */
1576         info->fix = sh_mobile_lcdc_overlay_fix;
1577         snprintf(info->fix.id, sizeof(info->fix.id),
1578                  "SHMobile ovl %u", ovl->index);
1579         info->fix.smem_start = ovl->dma_handle;
1580         info->fix.smem_len = ovl->fb_size;
1581         info->fix.line_length = ovl->pitch;
1582
1583         if (ovl->format->yuv)
1584                 info->fix.visual = FB_VISUAL_FOURCC;
1585         else
1586                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1587
1588         switch (ovl->format->fourcc) {
1589         case V4L2_PIX_FMT_NV12:
1590         case V4L2_PIX_FMT_NV21:
1591                 info->fix.ypanstep = 2;
1592                 fallthrough;
1593         case V4L2_PIX_FMT_NV16:
1594         case V4L2_PIX_FMT_NV61:
1595                 info->fix.xpanstep = 2;
1596         }
1597
1598         /* Initialize variable screen information. */
1599         var = &info->var;
1600         memset(var, 0, sizeof(*var));
1601         var->xres = ovl->xres;
1602         var->yres = ovl->yres;
1603         var->xres_virtual = ovl->xres_virtual;
1604         var->yres_virtual = ovl->yres_virtual;
1605         var->activate = FB_ACTIVATE_NOW;
1606
1607         /* Use the legacy API by default for RGB formats, and the FOURCC API
1608          * for YUV formats.
1609          */
1610         if (!ovl->format->yuv)
1611                 var->bits_per_pixel = ovl->format->bpp;
1612         else
1613                 var->grayscale = ovl->format->fourcc;
1614
1615         return sh_mobile_lcdc_overlay_check_var(var, info);
1616 }
1617
1618 /* -----------------------------------------------------------------------------
1619  * Frame buffer operations - main frame buffer
1620  */
1621
1622 static int sh_mobile_lcdc_setcolreg(u_int regno,
1623                                     u_int red, u_int green, u_int blue,
1624                                     u_int transp, struct fb_info *info)
1625 {
1626         u32 *palette = info->pseudo_palette;
1627
1628         if (regno >= PALETTE_NR)
1629                 return -EINVAL;
1630
1631         /* only FB_VISUAL_TRUECOLOR supported */
1632
1633         red >>= 16 - info->var.red.length;
1634         green >>= 16 - info->var.green.length;
1635         blue >>= 16 - info->var.blue.length;
1636         transp >>= 16 - info->var.transp.length;
1637
1638         palette[regno] = (red << info->var.red.offset) |
1639           (green << info->var.green.offset) |
1640           (blue << info->var.blue.offset) |
1641           (transp << info->var.transp.offset);
1642
1643         return 0;
1644 }
1645
1646 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1647         .id =           "SH Mobile LCDC",
1648         .type =         FB_TYPE_PACKED_PIXELS,
1649         .visual =       FB_VISUAL_TRUECOLOR,
1650         .accel =        FB_ACCEL_NONE,
1651         .xpanstep =     1,
1652         .ypanstep =     1,
1653         .ywrapstep =    0,
1654         .capabilities = FB_CAP_FOURCC,
1655 };
1656
1657 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1658                                     const struct fb_fillrect *rect)
1659 {
1660         sys_fillrect(info, rect);
1661         sh_mobile_lcdc_deferred_io_touch(info);
1662 }
1663
1664 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1665                                     const struct fb_copyarea *area)
1666 {
1667         sys_copyarea(info, area);
1668         sh_mobile_lcdc_deferred_io_touch(info);
1669 }
1670
1671 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1672                                      const struct fb_image *image)
1673 {
1674         sys_imageblit(info, image);
1675         sh_mobile_lcdc_deferred_io_touch(info);
1676 }
1677
1678 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1679                               struct fb_info *info)
1680 {
1681         struct sh_mobile_lcdc_chan *ch = info->par;
1682         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1683         unsigned long ldrcntr;
1684         unsigned long base_addr_y, base_addr_c;
1685         unsigned long y_offset;
1686         unsigned long c_offset;
1687
1688         if (!ch->format->yuv) {
1689                 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1690                          * ch->format->bpp / 8;
1691                 c_offset = 0;
1692         } else {
1693                 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1694                 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1695
1696                 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1697                 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1698                          + var->xoffset * 2 / xsub;
1699         }
1700
1701         /* If the Y offset hasn't changed, the C offset hasn't either. There's
1702          * nothing to do in that case.
1703          */
1704         if (y_offset == ch->pan_y_offset)
1705                 return 0;
1706
1707         /* Set the source address for the next refresh */
1708         base_addr_y = ch->dma_handle + y_offset;
1709         base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1710                     + c_offset;
1711
1712         ch->base_addr_y = base_addr_y;
1713         ch->base_addr_c = base_addr_c;
1714         ch->pan_y_offset = y_offset;
1715
1716         lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1717         if (ch->format->yuv)
1718                 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1719
1720         ldrcntr = lcdc_read(priv, _LDRCNTR);
1721         if (lcdc_chan_is_sublcd(ch))
1722                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1723         else
1724                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1725
1726
1727         sh_mobile_lcdc_deferred_io_touch(info);
1728
1729         return 0;
1730 }
1731
1732 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1733                                 unsigned long arg)
1734 {
1735         struct sh_mobile_lcdc_chan *ch = info->par;
1736         int retval;
1737
1738         switch (cmd) {
1739         case FBIO_WAITFORVSYNC:
1740                 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1741                 break;
1742
1743         default:
1744                 retval = -ENOIOCTLCMD;
1745                 break;
1746         }
1747         return retval;
1748 }
1749
1750 static void sh_mobile_fb_reconfig(struct fb_info *info)
1751 {
1752         struct sh_mobile_lcdc_chan *ch = info->par;
1753         struct fb_var_screeninfo var;
1754         struct fb_videomode mode;
1755
1756         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1757                 /* More framebuffer users are active */
1758                 return;
1759
1760         fb_var_to_videomode(&mode, &info->var);
1761
1762         if (fb_mode_is_equal(&ch->display.mode, &mode))
1763                 return;
1764
1765         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1766         var = info->var;
1767         fb_videomode_to_var(&var, &ch->display.mode);
1768         var.width = ch->display.width;
1769         var.height = ch->display.height;
1770         var.activate = FB_ACTIVATE_NOW;
1771
1772         if (fb_set_var(info, &var) < 0)
1773                 /* Couldn't reconfigure, hopefully, can continue as before */
1774                 return;
1775
1776         fbcon_update_vcs(info, true);
1777 }
1778
1779 /*
1780  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1781  * user == 1, or with console sem held, if user == 0.
1782  */
1783 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1784 {
1785         struct sh_mobile_lcdc_chan *ch = info->par;
1786
1787         mutex_lock(&ch->open_lock);
1788         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1789
1790         ch->use_count--;
1791
1792         /* Nothing to reconfigure, when called from fbcon */
1793         if (user) {
1794                 console_lock();
1795                 sh_mobile_fb_reconfig(info);
1796                 console_unlock();
1797         }
1798
1799         mutex_unlock(&ch->open_lock);
1800
1801         return 0;
1802 }
1803
1804 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1805 {
1806         struct sh_mobile_lcdc_chan *ch = info->par;
1807
1808         mutex_lock(&ch->open_lock);
1809         ch->use_count++;
1810
1811         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1812         mutex_unlock(&ch->open_lock);
1813
1814         return 0;
1815 }
1816
1817 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1818                                     struct fb_info *info)
1819 {
1820         struct sh_mobile_lcdc_chan *ch = info->par;
1821         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1822         unsigned int best_dist = (unsigned int)-1;
1823         unsigned int best_xres = 0;
1824         unsigned int best_yres = 0;
1825         unsigned int i;
1826         int ret;
1827
1828         /* If board code provides us with a list of available modes, make sure
1829          * we use one of them. Find the mode closest to the requested one. The
1830          * distance between two modes is defined as the size of the
1831          * non-overlapping parts of the two rectangles.
1832          */
1833         for (i = 0; i < ch->cfg->num_modes; ++i) {
1834                 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1835                 unsigned int dist;
1836
1837                 /* We can only round up. */
1838                 if (var->xres > mode->xres || var->yres > mode->yres)
1839                         continue;
1840
1841                 dist = var->xres * var->yres + mode->xres * mode->yres
1842                      - 2 * min(var->xres, mode->xres)
1843                          * min(var->yres, mode->yres);
1844
1845                 if (dist < best_dist) {
1846                         best_xres = mode->xres;
1847                         best_yres = mode->yres;
1848                         best_dist = dist;
1849                 }
1850         }
1851
1852         /* If no available mode can be used, return an error. */
1853         if (ch->cfg->num_modes != 0) {
1854                 if (best_dist == (unsigned int)-1)
1855                         return -EINVAL;
1856
1857                 var->xres = best_xres;
1858                 var->yres = best_yres;
1859         }
1860
1861         ret = __sh_mobile_lcdc_check_var(var, info);
1862         if (ret < 0)
1863                 return ret;
1864
1865         /* only accept the forced_fourcc for dual channel configurations */
1866         if (p->forced_fourcc &&
1867             p->forced_fourcc != sh_mobile_format_fourcc(var))
1868                 return -EINVAL;
1869
1870         return 0;
1871 }
1872
1873 static int sh_mobile_lcdc_set_par(struct fb_info *info)
1874 {
1875         struct sh_mobile_lcdc_chan *ch = info->par;
1876         int ret;
1877
1878         sh_mobile_lcdc_stop(ch->lcdc);
1879
1880         ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1881         ch->colorspace = info->var.colorspace;
1882
1883         ch->xres = info->var.xres;
1884         ch->xres_virtual = info->var.xres_virtual;
1885         ch->yres = info->var.yres;
1886         ch->yres_virtual = info->var.yres_virtual;
1887
1888         if (ch->format->yuv)
1889                 ch->pitch = info->var.xres_virtual;
1890         else
1891                 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
1892
1893         ret = sh_mobile_lcdc_start(ch->lcdc);
1894         if (ret < 0)
1895                 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1896
1897         info->fix.line_length = ch->pitch;
1898
1899         if (sh_mobile_format_is_fourcc(&info->var)) {
1900                 info->fix.type = FB_TYPE_FOURCC;
1901                 info->fix.visual = FB_VISUAL_FOURCC;
1902         } else {
1903                 info->fix.type = FB_TYPE_PACKED_PIXELS;
1904                 info->fix.visual = FB_VISUAL_TRUECOLOR;
1905         }
1906
1907         return ret;
1908 }
1909
1910 /*
1911  * Screen blanking. Behavior is as follows:
1912  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1913  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1914  * FB_BLANK_VSYNC,
1915  * FB_BLANK_HSYNC,
1916  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1917  */
1918 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1919 {
1920         struct sh_mobile_lcdc_chan *ch = info->par;
1921         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1922
1923         /* blank the screen? */
1924         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1925                 struct fb_fillrect rect = {
1926                         .width = ch->xres,
1927                         .height = ch->yres,
1928                 };
1929                 sh_mobile_lcdc_fillrect(info, &rect);
1930         }
1931         /* turn clocks on? */
1932         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1933                 sh_mobile_lcdc_clk_on(p);
1934         }
1935         /* turn clocks off? */
1936         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1937                 /* make sure the screen is updated with the black fill before
1938                  * switching the clocks off. one vsync is not enough since
1939                  * blanking may occur in the middle of a refresh. deferred io
1940                  * mode will reenable the clocks and update the screen in time,
1941                  * so it does not need this. */
1942                 if (!info->fbdefio) {
1943                         sh_mobile_lcdc_wait_for_vsync(ch);
1944                         sh_mobile_lcdc_wait_for_vsync(ch);
1945                 }
1946                 sh_mobile_lcdc_clk_off(p);
1947         }
1948
1949         ch->blank_status = blank;
1950         return 0;
1951 }
1952
1953 static int
1954 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
1955 {
1956         struct sh_mobile_lcdc_chan *ch = info->par;
1957
1958         if (info->fbdefio)
1959                 return fb_deferred_io_mmap(info, vma);
1960
1961         vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
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_DEFAULT_DMAMEM_OPS_RDWR,
1971         .fb_fillrect    = sh_mobile_lcdc_fillrect,
1972         .fb_copyarea    = sh_mobile_lcdc_copyarea,
1973         .fb_imageblit   = sh_mobile_lcdc_imageblit,
1974         .fb_blank       = sh_mobile_lcdc_blank,
1975         .fb_pan_display = sh_mobile_lcdc_pan,
1976         .fb_ioctl       = sh_mobile_lcdc_ioctl,
1977         .fb_open        = sh_mobile_lcdc_open,
1978         .fb_release     = sh_mobile_lcdc_release,
1979         .fb_check_var   = sh_mobile_lcdc_check_var,
1980         .fb_set_par     = sh_mobile_lcdc_set_par,
1981         .fb_mmap        = sh_mobile_lcdc_mmap,
1982 };
1983
1984 static void
1985 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
1986 {
1987         if (ch->info && ch->info->dev)
1988                 unregister_framebuffer(ch->info);
1989 }
1990
1991 static int
1992 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
1993 {
1994         struct fb_info *info = ch->info;
1995         int ret;
1996
1997         if (info->fbdefio) {
1998                 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1999                                      ch->fb_size >> PAGE_SHIFT);
2000                 if (!ch->sglist)
2001                         return -ENOMEM;
2002         }
2003
2004         info->bl_dev = ch->bl;
2005
2006         ret = register_framebuffer(info);
2007         if (ret < 0)
2008                 return ret;
2009
2010         dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2011                  dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2012                  "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2013                  info->var.bits_per_pixel);
2014
2015         /* deferred io mode: disable clock to save power */
2016         if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2017                 sh_mobile_lcdc_clk_off(ch->lcdc);
2018
2019         return ret;
2020 }
2021
2022 static void
2023 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2024 {
2025         struct fb_info *info = ch->info;
2026
2027         if (!info || !info->device)
2028                 return;
2029
2030         vfree(ch->sglist);
2031
2032         fb_dealloc_cmap(&info->cmap);
2033         framebuffer_release(info);
2034 }
2035
2036 static int
2037 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2038                                const struct fb_videomode *modes,
2039                                unsigned int num_modes)
2040 {
2041         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2042         struct fb_var_screeninfo *var;
2043         struct fb_info *info;
2044         int ret;
2045
2046         /* Allocate and initialize the frame buffer device. Create the modes
2047          * list and allocate the color map.
2048          */
2049         info = framebuffer_alloc(0, priv->dev);
2050         if (!info)
2051                 return -ENOMEM;
2052
2053         ch->info = info;
2054
2055         info->fbops = &sh_mobile_lcdc_ops;
2056         info->device = priv->dev;
2057         info->flags |= FBINFO_VIRTFB;
2058         info->screen_buffer = ch->fb_mem;
2059         info->pseudo_palette = &ch->pseudo_palette;
2060         info->par = ch;
2061
2062         fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2063
2064         ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2065         if (ret < 0) {
2066                 dev_err(priv->dev, "unable to allocate cmap\n");
2067                 return ret;
2068         }
2069
2070         /* Initialize fixed screen information. Restrict pan to 2 lines steps
2071          * for NV12 and NV21.
2072          */
2073         info->fix = sh_mobile_lcdc_fix;
2074         info->fix.smem_start = ch->dma_handle;
2075         info->fix.smem_len = ch->fb_size;
2076         info->fix.line_length = ch->pitch;
2077
2078         if (ch->format->yuv)
2079                 info->fix.visual = FB_VISUAL_FOURCC;
2080         else
2081                 info->fix.visual = FB_VISUAL_TRUECOLOR;
2082
2083         switch (ch->format->fourcc) {
2084         case V4L2_PIX_FMT_NV12:
2085         case V4L2_PIX_FMT_NV21:
2086                 info->fix.ypanstep = 2;
2087                 fallthrough;
2088         case V4L2_PIX_FMT_NV16:
2089         case V4L2_PIX_FMT_NV61:
2090                 info->fix.xpanstep = 2;
2091         }
2092
2093         /* Initialize variable screen information using the first mode as
2094          * default.
2095          */
2096         var = &info->var;
2097         fb_videomode_to_var(var, modes);
2098         var->width = ch->display.width;
2099         var->height = ch->display.height;
2100         var->xres_virtual = ch->xres_virtual;
2101         var->yres_virtual = ch->yres_virtual;
2102         var->activate = FB_ACTIVATE_NOW;
2103
2104         /* Use the legacy API by default for RGB formats, and the FOURCC API
2105          * for YUV formats.
2106          */
2107         if (!ch->format->yuv)
2108                 var->bits_per_pixel = ch->format->bpp;
2109         else
2110                 var->grayscale = ch->format->fourcc;
2111
2112         ret = sh_mobile_lcdc_check_var(var, info);
2113         if (ret)
2114                 return ret;
2115
2116         return 0;
2117 }
2118
2119 /* -----------------------------------------------------------------------------
2120  * Backlight
2121  */
2122
2123 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2124 {
2125         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2126         int brightness = bdev->props.brightness;
2127
2128         if (bdev->props.power != FB_BLANK_UNBLANK ||
2129             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2130                 brightness = 0;
2131
2132         ch->bl_brightness = brightness;
2133         return ch->cfg->bl_info.set_brightness(brightness);
2134 }
2135
2136 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2137 {
2138         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2139
2140         return ch->bl_brightness;
2141 }
2142
2143 static const struct backlight_ops sh_mobile_lcdc_bl_ops = {
2144         .options        = BL_CORE_SUSPENDRESUME,
2145         .update_status  = sh_mobile_lcdc_update_bl,
2146         .get_brightness = sh_mobile_lcdc_get_brightness,
2147 };
2148
2149 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2150                                                struct sh_mobile_lcdc_chan *ch)
2151 {
2152         struct backlight_device *bl;
2153
2154         bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2155                                        &sh_mobile_lcdc_bl_ops, NULL);
2156         if (IS_ERR(bl)) {
2157                 dev_err(parent, "unable to register backlight device: %ld\n",
2158                         PTR_ERR(bl));
2159                 return NULL;
2160         }
2161
2162         bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2163         bl->props.brightness = bl->props.max_brightness;
2164         backlight_update_status(bl);
2165
2166         return bl;
2167 }
2168
2169 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2170 {
2171         backlight_device_unregister(bdev);
2172 }
2173
2174 /* -----------------------------------------------------------------------------
2175  * Power management
2176  */
2177
2178 static int sh_mobile_lcdc_suspend(struct device *dev)
2179 {
2180         struct platform_device *pdev = to_platform_device(dev);
2181
2182         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2183         return 0;
2184 }
2185
2186 static int sh_mobile_lcdc_resume(struct device *dev)
2187 {
2188         struct platform_device *pdev = to_platform_device(dev);
2189
2190         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2191 }
2192
2193 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2194 {
2195         struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2196
2197         /* turn off LCDC hardware */
2198         lcdc_write(priv, _LDCNT1R, 0);
2199
2200         return 0;
2201 }
2202
2203 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2204 {
2205         struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2206
2207         __sh_mobile_lcdc_start(priv);
2208
2209         return 0;
2210 }
2211
2212 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2213         .suspend = sh_mobile_lcdc_suspend,
2214         .resume = sh_mobile_lcdc_resume,
2215         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2216         .runtime_resume = sh_mobile_lcdc_runtime_resume,
2217 };
2218
2219 /* -----------------------------------------------------------------------------
2220  * Framebuffer notifier
2221  */
2222
2223 /* -----------------------------------------------------------------------------
2224  * Probe/remove and driver init/exit
2225  */
2226
2227 static const struct fb_videomode default_720p = {
2228         .name = "HDMI 720p",
2229         .xres = 1280,
2230         .yres = 720,
2231
2232         .left_margin = 220,
2233         .right_margin = 110,
2234         .hsync_len = 40,
2235
2236         .upper_margin = 20,
2237         .lower_margin = 5,
2238         .vsync_len = 5,
2239
2240         .pixclock = 13468,
2241         .refresh = 60,
2242         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2243 };
2244
2245 static void sh_mobile_lcdc_remove(struct platform_device *pdev)
2246 {
2247         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2248         unsigned int i;
2249
2250         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2251                 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2252         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2253                 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2254
2255         sh_mobile_lcdc_stop(priv);
2256
2257         for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2258                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2259
2260                 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2261
2262                 if (ovl->fb_mem)
2263                         dma_free_coherent(&pdev->dev, ovl->fb_size,
2264                                           ovl->fb_mem, ovl->dma_handle);
2265         }
2266
2267         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2268                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2269
2270                 if (ch->tx_dev) {
2271                         ch->tx_dev->lcdc = NULL;
2272                         module_put(ch->cfg->tx_dev->dev.driver->owner);
2273                 }
2274
2275                 sh_mobile_lcdc_channel_fb_cleanup(ch);
2276
2277                 if (ch->fb_mem)
2278                         dma_free_coherent(&pdev->dev, ch->fb_size,
2279                                           ch->fb_mem, ch->dma_handle);
2280         }
2281
2282         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2283                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2284
2285                 if (ch->bl)
2286                         sh_mobile_lcdc_bl_remove(ch->bl);
2287                 mutex_destroy(&ch->open_lock);
2288         }
2289
2290         if (priv->dot_clk) {
2291                 pm_runtime_disable(&pdev->dev);
2292                 clk_put(priv->dot_clk);
2293         }
2294
2295         if (priv->base)
2296                 iounmap(priv->base);
2297
2298         if (priv->irq)
2299                 free_irq(priv->irq, priv);
2300         kfree(priv);
2301 }
2302
2303 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2304 {
2305         int interface_type = ch->cfg->interface_type;
2306
2307         switch (interface_type) {
2308         case RGB8:
2309         case RGB9:
2310         case RGB12A:
2311         case RGB12B:
2312         case RGB16:
2313         case RGB18:
2314         case RGB24:
2315         case SYS8A:
2316         case SYS8B:
2317         case SYS8C:
2318         case SYS8D:
2319         case SYS9:
2320         case SYS12:
2321         case SYS16A:
2322         case SYS16B:
2323         case SYS16C:
2324         case SYS18:
2325         case SYS24:
2326                 break;
2327         default:
2328                 return -EINVAL;
2329         }
2330
2331         /* SUBLCD only supports SYS interface */
2332         if (lcdc_chan_is_sublcd(ch)) {
2333                 if (!(interface_type & LDMT1R_IFM))
2334                         return -EINVAL;
2335
2336                 interface_type &= ~LDMT1R_IFM;
2337         }
2338
2339         ch->ldmt1r_value = interface_type;
2340         return 0;
2341 }
2342
2343 static int
2344 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2345 {
2346         const struct sh_mobile_lcdc_format_info *format;
2347         struct device *dev = ovl->channel->lcdc->dev;
2348         int ret;
2349
2350         if (ovl->cfg->fourcc == 0)
2351                 return 0;
2352
2353         /* Validate the format. */
2354         format = sh_mobile_format_info(ovl->cfg->fourcc);
2355         if (format == NULL) {
2356                 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2357                 return -EINVAL;
2358         }
2359
2360         ovl->enabled = false;
2361         ovl->mode = LCDC_OVERLAY_BLEND;
2362         ovl->alpha = 255;
2363         ovl->rop3 = 0;
2364         ovl->pos_x = 0;
2365         ovl->pos_y = 0;
2366
2367         /* The default Y virtual resolution is twice the panel size to allow for
2368          * double-buffering.
2369          */
2370         ovl->format = format;
2371         ovl->xres = ovl->cfg->max_xres;
2372         ovl->xres_virtual = ovl->xres;
2373         ovl->yres = ovl->cfg->max_yres;
2374         ovl->yres_virtual = ovl->yres * 2;
2375
2376         if (!format->yuv)
2377                 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2378         else
2379                 ovl->pitch = ovl->xres_virtual;
2380
2381         /* Allocate frame buffer memory. */
2382         ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2383                        * format->bpp / 8 * 2;
2384         ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2385                                          GFP_KERNEL);
2386         if (!ovl->fb_mem) {
2387                 dev_err(dev, "unable to allocate buffer\n");
2388                 return -ENOMEM;
2389         }
2390
2391         ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2392         if (ret < 0)
2393                 return ret;
2394
2395         return 0;
2396 }
2397
2398 static int
2399 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2400 {
2401         const struct sh_mobile_lcdc_format_info *format;
2402         const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2403         struct device *dev = ch->lcdc->dev;
2404         const struct fb_videomode *max_mode;
2405         const struct fb_videomode *mode;
2406         unsigned int num_modes;
2407         unsigned int max_size;
2408         unsigned int i;
2409
2410         /* Validate the format. */
2411         format = sh_mobile_format_info(cfg->fourcc);
2412         if (format == NULL) {
2413                 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2414                 return -EINVAL;
2415         }
2416
2417         /* Iterate through the modes to validate them and find the highest
2418          * resolution.
2419          */
2420         max_mode = NULL;
2421         max_size = 0;
2422
2423         for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2424                 unsigned int size = mode->yres * mode->xres;
2425
2426                 /* NV12/NV21 buffers must have even number of lines */
2427                 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2428                      cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2429                         dev_err(dev, "yres must be multiple of 2 for "
2430                                 "YCbCr420 mode.\n");
2431                         return -EINVAL;
2432                 }
2433
2434                 if (size > max_size) {
2435                         max_mode = mode;
2436                         max_size = size;
2437                 }
2438         }
2439
2440         if (!max_size)
2441                 max_size = MAX_XRES * MAX_YRES;
2442         else
2443                 dev_dbg(dev, "Found largest videomode %ux%u\n",
2444                         max_mode->xres, max_mode->yres);
2445
2446         if (cfg->lcd_modes == NULL) {
2447                 mode = &default_720p;
2448                 num_modes = 1;
2449         } else {
2450                 mode = cfg->lcd_modes;
2451                 num_modes = cfg->num_modes;
2452         }
2453
2454         /* Use the first mode as default. The default Y virtual resolution is
2455          * twice the panel size to allow for double-buffering.
2456          */
2457         ch->format = format;
2458         ch->xres = mode->xres;
2459         ch->xres_virtual = mode->xres;
2460         ch->yres = mode->yres;
2461         ch->yres_virtual = mode->yres * 2;
2462
2463         if (!format->yuv) {
2464                 ch->colorspace = V4L2_COLORSPACE_SRGB;
2465                 ch->pitch = ch->xres_virtual * format->bpp / 8;
2466         } else {
2467                 ch->colorspace = V4L2_COLORSPACE_REC709;
2468                 ch->pitch = ch->xres_virtual;
2469         }
2470
2471         ch->display.width = cfg->panel_cfg.width;
2472         ch->display.height = cfg->panel_cfg.height;
2473         ch->display.mode = *mode;
2474
2475         /* Allocate frame buffer memory. */
2476         ch->fb_size = max_size * format->bpp / 8 * 2;
2477         ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2478                                         GFP_KERNEL);
2479         if (ch->fb_mem == NULL) {
2480                 dev_err(dev, "unable to allocate buffer\n");
2481                 return -ENOMEM;
2482         }
2483
2484         /* Initialize the transmitter device if present. */
2485         if (cfg->tx_dev) {
2486                 if (!cfg->tx_dev->dev.driver ||
2487                     !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2488                         dev_warn(dev, "unable to get transmitter device\n");
2489                         return -EINVAL;
2490                 }
2491                 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2492                 ch->tx_dev->lcdc = ch;
2493                 ch->tx_dev->def_mode = *mode;
2494         }
2495
2496         return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2497 }
2498
2499 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2500 {
2501         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2502         struct sh_mobile_lcdc_priv *priv;
2503         struct resource *res;
2504         int num_channels;
2505         int error;
2506         int irq, i;
2507
2508         if (!pdata) {
2509                 dev_err(&pdev->dev, "no platform data defined\n");
2510                 return -EINVAL;
2511         }
2512
2513         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2514         irq = platform_get_irq(pdev, 0);
2515         if (!res || irq < 0) {
2516                 dev_err(&pdev->dev, "cannot get platform resources\n");
2517                 return -ENOENT;
2518         }
2519
2520         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2521         if (!priv)
2522                 return -ENOMEM;
2523
2524         priv->dev = &pdev->dev;
2525
2526         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2527                 mutex_init(&priv->ch[i].open_lock);
2528         platform_set_drvdata(pdev, priv);
2529
2530         error = request_irq(irq, sh_mobile_lcdc_irq, 0,
2531                             dev_name(&pdev->dev), priv);
2532         if (error) {
2533                 dev_err(&pdev->dev, "unable to request irq\n");
2534                 goto err1;
2535         }
2536
2537         priv->irq = irq;
2538         atomic_set(&priv->hw_usecnt, -1);
2539
2540         for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2541                 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2542
2543                 ch->lcdc = priv;
2544                 ch->cfg = &pdata->ch[i];
2545
2546                 error = sh_mobile_lcdc_check_interface(ch);
2547                 if (error) {
2548                         dev_err(&pdev->dev, "unsupported interface type\n");
2549                         goto err1;
2550                 }
2551                 init_waitqueue_head(&ch->frame_end_wait);
2552                 init_completion(&ch->vsync_completion);
2553
2554                 /* probe the backlight is there is one defined */
2555                 if (ch->cfg->bl_info.max_brightness)
2556                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2557
2558                 switch (pdata->ch[i].chan) {
2559                 case LCDC_CHAN_MAINLCD:
2560                         ch->enabled = LDCNT2R_ME;
2561                         ch->reg_offs = lcdc_offs_mainlcd;
2562                         num_channels++;
2563                         break;
2564                 case LCDC_CHAN_SUBLCD:
2565                         ch->enabled = LDCNT2R_SE;
2566                         ch->reg_offs = lcdc_offs_sublcd;
2567                         num_channels++;
2568                         break;
2569                 }
2570         }
2571
2572         if (!num_channels) {
2573                 dev_err(&pdev->dev, "no channels defined\n");
2574                 error = -EINVAL;
2575                 goto err1;
2576         }
2577
2578         /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2579         if (num_channels == 2)
2580                 priv->forced_fourcc = pdata->ch[0].fourcc;
2581
2582         priv->base = ioremap(res->start, resource_size(res));
2583         if (!priv->base) {
2584                 error = -ENOMEM;
2585                 goto err1;
2586         }
2587
2588         error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2589         if (error) {
2590                 dev_err(&pdev->dev, "unable to setup clocks\n");
2591                 goto err1;
2592         }
2593
2594         /* Enable runtime PM. */
2595         pm_runtime_enable(&pdev->dev);
2596
2597         for (i = 0; i < num_channels; i++) {
2598                 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2599
2600                 error = sh_mobile_lcdc_channel_init(ch);
2601                 if (error)
2602                         goto err1;
2603         }
2604
2605         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2606                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2607
2608                 ovl->cfg = &pdata->overlays[i];
2609                 ovl->channel = &priv->ch[0];
2610
2611                 error = sh_mobile_lcdc_overlay_init(ovl);
2612                 if (error)
2613                         goto err1;
2614         }
2615
2616         error = sh_mobile_lcdc_start(priv);
2617         if (error) {
2618                 dev_err(&pdev->dev, "unable to start hardware\n");
2619                 goto err1;
2620         }
2621
2622         for (i = 0; i < num_channels; i++) {
2623                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2624
2625                 error = sh_mobile_lcdc_channel_fb_register(ch);
2626                 if (error)
2627                         goto err1;
2628         }
2629
2630         for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2631                 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2632
2633                 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2634                 if (error)
2635                         goto err1;
2636         }
2637
2638         return 0;
2639 err1:
2640         sh_mobile_lcdc_remove(pdev);
2641
2642         return error;
2643 }
2644
2645 static struct platform_driver sh_mobile_lcdc_driver = {
2646         .driver         = {
2647                 .name           = "sh_mobile_lcdc_fb",
2648                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
2649         },
2650         .probe          = sh_mobile_lcdc_probe,
2651         .remove_new     = sh_mobile_lcdc_remove,
2652 };
2653
2654 module_platform_driver(sh_mobile_lcdc_driver);
2655
2656 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2657 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2658 MODULE_LICENSE("GPL v2");