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