linux/drivers/video/sh_mobile_lcdcfb.c
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   1/*
   2 * SuperH Mobile LCDC Framebuffer
   3 *
   4 * Copyright (c) 2008 Magnus Damm
   5 *
   6 * This file is subject to the terms and conditions of the GNU General Public
   7 * License.  See the file "COPYING" in the main directory of this archive
   8 * for more details.
   9 */
  10
  11#include <linux/atomic.h>
  12#include <linux/backlight.h>
  13#include <linux/clk.h>
  14#include <linux/console.h>
  15#include <linux/ctype.h>
  16#include <linux/dma-mapping.h>
  17#include <linux/delay.h>
  18#include <linux/gpio.h>
  19#include <linux/init.h>
  20#include <linux/interrupt.h>
  21#include <linux/ioctl.h>
  22#include <linux/kernel.h>
  23#include <linux/mm.h>
  24#include <linux/module.h>
  25#include <linux/platform_device.h>
  26#include <linux/pm_runtime.h>
  27#include <linux/slab.h>
  28#include <linux/videodev2.h>
  29#include <linux/vmalloc.h>
  30
  31#include <video/sh_mobile_lcdc.h>
  32#include <video/sh_mobile_meram.h>
  33
  34#include "sh_mobile_lcdcfb.h"
  35
  36/* ----------------------------------------------------------------------------
  37 * Overlay register definitions
  38 */
  39
  40#define LDBCR                   0xb00
  41#define LDBCR_UPC(n)            (1 << ((n) + 16))
  42#define LDBCR_UPF(n)            (1 << ((n) + 8))
  43#define LDBCR_UPD(n)            (1 << ((n) + 0))
  44#define LDBnBSIFR(n)            (0xb20 + (n) * 0x20 + 0x00)
  45#define LDBBSIFR_EN             (1 << 31)
  46#define LDBBSIFR_VS             (1 << 29)
  47#define LDBBSIFR_BRSEL          (1 << 28)
  48#define LDBBSIFR_MX             (1 << 27)
  49#define LDBBSIFR_MY             (1 << 26)
  50#define LDBBSIFR_CV3            (3 << 24)
  51#define LDBBSIFR_CV2            (2 << 24)
  52#define LDBBSIFR_CV1            (1 << 24)
  53#define LDBBSIFR_CV0            (0 << 24)
  54#define LDBBSIFR_CV_MASK        (3 << 24)
  55#define LDBBSIFR_LAY_MASK       (0xff << 16)
  56#define LDBBSIFR_LAY_SHIFT      16
  57#define LDBBSIFR_ROP3_MASK      (0xff << 16)
  58#define LDBBSIFR_ROP3_SHIFT     16
  59#define LDBBSIFR_AL_PL8         (3 << 14)
  60#define LDBBSIFR_AL_PL1         (2 << 14)
  61#define LDBBSIFR_AL_PK          (1 << 14)
  62#define LDBBSIFR_AL_1           (0 << 14)
  63#define LDBBSIFR_AL_MASK        (3 << 14)
  64#define LDBBSIFR_SWPL           (1 << 10)
  65#define LDBBSIFR_SWPW           (1 << 9)
  66#define LDBBSIFR_SWPB           (1 << 8)
  67#define LDBBSIFR_RY             (1 << 7)
  68#define LDBBSIFR_CHRR_420       (2 << 0)
  69#define LDBBSIFR_CHRR_422       (1 << 0)
  70#define LDBBSIFR_CHRR_444       (0 << 0)
  71#define LDBBSIFR_RPKF_ARGB32    (0x00 << 0)
  72#define LDBBSIFR_RPKF_RGB16     (0x03 << 0)
  73#define LDBBSIFR_RPKF_RGB24     (0x0b << 0)
  74#define LDBBSIFR_RPKF_MASK      (0x1f << 0)
  75#define LDBnBSSZR(n)            (0xb20 + (n) * 0x20 + 0x04)
  76#define LDBBSSZR_BVSS_MASK      (0xfff << 16)
  77#define LDBBSSZR_BVSS_SHIFT     16
  78#define LDBBSSZR_BHSS_MASK      (0xfff << 0)
  79#define LDBBSSZR_BHSS_SHIFT     0
  80#define LDBnBLOCR(n)            (0xb20 + (n) * 0x20 + 0x08)
  81#define LDBBLOCR_CVLC_MASK      (0xfff << 16)
  82#define LDBBLOCR_CVLC_SHIFT     16
  83#define LDBBLOCR_CHLC_MASK      (0xfff << 0)
  84#define LDBBLOCR_CHLC_SHIFT     0
  85#define LDBnBSMWR(n)            (0xb20 + (n) * 0x20 + 0x0c)
  86#define LDBBSMWR_BSMWA_MASK     (0xffff << 16)
  87#define LDBBSMWR_BSMWA_SHIFT    16
  88#define LDBBSMWR_BSMW_MASK      (0xffff << 0)
  89#define LDBBSMWR_BSMW_SHIFT     0
  90#define LDBnBSAYR(n)            (0xb20 + (n) * 0x20 + 0x10)
  91#define LDBBSAYR_FG1A_MASK      (0xff << 24)
  92#define LDBBSAYR_FG1A_SHIFT     24
  93#define LDBBSAYR_FG1R_MASK      (0xff << 16)
  94#define LDBBSAYR_FG1R_SHIFT     16
  95#define LDBBSAYR_FG1G_MASK      (0xff << 8)
  96#define LDBBSAYR_FG1G_SHIFT     8
  97#define LDBBSAYR_FG1B_MASK      (0xff << 0)
  98#define LDBBSAYR_FG1B_SHIFT     0
  99#define LDBnBSACR(n)            (0xb20 + (n) * 0x20 + 0x14)
 100#define LDBBSACR_FG2A_MASK      (0xff << 24)
 101#define LDBBSACR_FG2A_SHIFT     24
 102#define LDBBSACR_FG2R_MASK      (0xff << 16)
 103#define LDBBSACR_FG2R_SHIFT     16
 104#define LDBBSACR_FG2G_MASK      (0xff << 8)
 105#define LDBBSACR_FG2G_SHIFT     8
 106#define LDBBSACR_FG2B_MASK      (0xff << 0)
 107#define LDBBSACR_FG2B_SHIFT     0
 108#define LDBnBSAAR(n)            (0xb20 + (n) * 0x20 + 0x18)
 109#define LDBBSAAR_AP_MASK        (0xff << 24)
 110#define LDBBSAAR_AP_SHIFT       24
 111#define LDBBSAAR_R_MASK         (0xff << 16)
 112#define LDBBSAAR_R_SHIFT        16
 113#define LDBBSAAR_GY_MASK        (0xff << 8)
 114#define LDBBSAAR_GY_SHIFT       8
 115#define LDBBSAAR_B_MASK         (0xff << 0)
 116#define LDBBSAAR_B_SHIFT        0
 117#define LDBnBPPCR(n)            (0xb20 + (n) * 0x20 + 0x1c)
 118#define LDBBPPCR_AP_MASK        (0xff << 24)
 119#define LDBBPPCR_AP_SHIFT       24
 120#define LDBBPPCR_R_MASK         (0xff << 16)
 121#define LDBBPPCR_R_SHIFT        16
 122#define LDBBPPCR_GY_MASK        (0xff << 8)
 123#define LDBBPPCR_GY_SHIFT       8
 124#define LDBBPPCR_B_MASK         (0xff << 0)
 125#define LDBBPPCR_B_SHIFT        0
 126#define LDBnBBGCL(n)            (0xb10 + (n) * 0x04)
 127#define LDBBBGCL_BGA_MASK       (0xff << 24)
 128#define LDBBBGCL_BGA_SHIFT      24
 129#define LDBBBGCL_BGR_MASK       (0xff << 16)
 130#define LDBBBGCL_BGR_SHIFT      16
 131#define LDBBBGCL_BGG_MASK       (0xff << 8)
 132#define LDBBBGCL_BGG_SHIFT      8
 133#define LDBBBGCL_BGB_MASK       (0xff << 0)
 134#define LDBBBGCL_BGB_SHIFT      0
 135
 136#define SIDE_B_OFFSET 0x1000
 137#define MIRROR_OFFSET 0x2000
 138
 139#define MAX_XRES 1920
 140#define MAX_YRES 1080
 141
 142enum sh_mobile_lcdc_overlay_mode {
 143        LCDC_OVERLAY_BLEND,
 144        LCDC_OVERLAY_ROP3,
 145};
 146
 147/*
 148 * struct sh_mobile_lcdc_overlay - LCDC display overlay
 149 *
 150 * @channel: LCDC channel this overlay belongs to
 151 * @cfg: Overlay configuration
 152 * @info: Frame buffer device
 153 * @index: Overlay index (0-3)
 154 * @base: Overlay registers base address
 155 * @enabled: True if the overlay is enabled
 156 * @mode: Overlay blending mode (alpha blend or ROP3)
 157 * @alpha: Global alpha blending value (0-255, for alpha blending mode)
 158 * @rop3: Raster operation (for ROP3 mode)
 159 * @fb_mem: Frame buffer virtual memory address
 160 * @fb_size: Frame buffer size in bytes
 161 * @dma_handle: Frame buffer DMA address
 162 * @base_addr_y: Overlay base address (RGB or luma component)
 163 * @base_addr_c: Overlay base address (chroma component)
 164 * @pan_y_offset: Panning linear offset in bytes (luma component)
 165 * @format: Current pixelf format
 166 * @xres: Horizontal visible resolution
 167 * @xres_virtual: Horizontal total resolution
 168 * @yres: Vertical visible resolution
 169 * @yres_virtual: Vertical total resolution
 170 * @pitch: Overlay line pitch
 171 * @pos_x: Horizontal overlay position
 172 * @pos_y: Vertical overlay position
 173 */
 174struct sh_mobile_lcdc_overlay {
 175        struct sh_mobile_lcdc_chan *channel;
 176
 177        const struct sh_mobile_lcdc_overlay_cfg *cfg;
 178        struct fb_info *info;
 179
 180        unsigned int index;
 181        unsigned long base;
 182
 183        bool enabled;
 184        enum sh_mobile_lcdc_overlay_mode mode;
 185        unsigned int alpha;
 186        unsigned int rop3;
 187
 188        void *fb_mem;
 189        unsigned long fb_size;
 190
 191        dma_addr_t dma_handle;
 192        unsigned long base_addr_y;
 193        unsigned long base_addr_c;
 194        unsigned long pan_y_offset;
 195
 196        const struct sh_mobile_lcdc_format_info *format;
 197        unsigned int xres;
 198        unsigned int xres_virtual;
 199        unsigned int yres;
 200        unsigned int yres_virtual;
 201        unsigned int pitch;
 202        int pos_x;
 203        int pos_y;
 204};
 205
 206struct sh_mobile_lcdc_priv {
 207        void __iomem *base;
 208        int irq;
 209        atomic_t hw_usecnt;
 210        struct device *dev;
 211        struct clk *dot_clk;
 212        unsigned long lddckr;
 213
 214        struct sh_mobile_lcdc_chan ch[2];
 215        struct sh_mobile_lcdc_overlay overlays[4];
 216
 217        struct notifier_block notifier;
 218        int started;
 219        int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
 220        struct sh_mobile_meram_info *meram_dev;
 221};
 222
 223/* -----------------------------------------------------------------------------
 224 * Registers access
 225 */
 226
 227static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
 228        [LDDCKPAT1R] = 0x400,
 229        [LDDCKPAT2R] = 0x404,
 230        [LDMT1R] = 0x418,
 231        [LDMT2R] = 0x41c,
 232        [LDMT3R] = 0x420,
 233        [LDDFR] = 0x424,
 234        [LDSM1R] = 0x428,
 235        [LDSM2R] = 0x42c,
 236        [LDSA1R] = 0x430,
 237        [LDSA2R] = 0x434,
 238        [LDMLSR] = 0x438,
 239        [LDHCNR] = 0x448,
 240        [LDHSYNR] = 0x44c,
 241        [LDVLNR] = 0x450,
 242        [LDVSYNR] = 0x454,
 243        [LDPMR] = 0x460,
 244        [LDHAJR] = 0x4a0,
 245};
 246
 247static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
 248        [LDDCKPAT1R] = 0x408,
 249        [LDDCKPAT2R] = 0x40c,
 250        [LDMT1R] = 0x600,
 251        [LDMT2R] = 0x604,
 252        [LDMT3R] = 0x608,
 253        [LDDFR] = 0x60c,
 254        [LDSM1R] = 0x610,
 255        [LDSM2R] = 0x614,
 256        [LDSA1R] = 0x618,
 257        [LDMLSR] = 0x620,
 258        [LDHCNR] = 0x624,
 259        [LDHSYNR] = 0x628,
 260        [LDVLNR] = 0x62c,
 261        [LDVSYNR] = 0x630,
 262        [LDPMR] = 0x63c,
 263};
 264
 265static bool banked(int reg_nr)
 266{
 267        switch (reg_nr) {
 268        case LDMT1R:
 269        case LDMT2R:
 270        case LDMT3R:
 271        case LDDFR:
 272        case LDSM1R:
 273        case LDSA1R:
 274        case LDSA2R:
 275        case LDMLSR:
 276        case LDHCNR:
 277        case LDHSYNR:
 278        case LDVLNR:
 279        case LDVSYNR:
 280                return true;
 281        }
 282        return false;
 283}
 284
 285static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
 286{
 287        return chan->cfg->chan == LCDC_CHAN_SUBLCD;
 288}
 289
 290static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
 291                            int reg_nr, unsigned long data)
 292{
 293        iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
 294        if (banked(reg_nr))
 295                iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 296                          SIDE_B_OFFSET);
 297}
 298
 299static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
 300                            int reg_nr, unsigned long data)
 301{
 302        iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
 303                  MIRROR_OFFSET);
 304}
 305
 306static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
 307                                    int reg_nr)
 308{
 309        return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
 310}
 311
 312static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
 313                               int reg, unsigned long data)
 314{
 315        iowrite32(data, ovl->channel->lcdc->base + reg);
 316        iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
 317}
 318
 319static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
 320                       unsigned long reg_offs, unsigned long data)
 321{
 322        iowrite32(data, priv->base + reg_offs);
 323}
 324
 325static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
 326                               unsigned long reg_offs)
 327{
 328        return ioread32(priv->base + reg_offs);
 329}
 330
 331static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
 332                          unsigned long reg_offs,
 333                          unsigned long mask, unsigned long until)
 334{
 335        while ((lcdc_read(priv, reg_offs) & mask) != until)
 336                cpu_relax();
 337}
 338
 339/* -----------------------------------------------------------------------------
 340 * Clock management
 341 */
 342
 343static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
 344{
 345        if (atomic_inc_and_test(&priv->hw_usecnt)) {
 346                if (priv->dot_clk)
 347                        clk_enable(priv->dot_clk);
 348                pm_runtime_get_sync(priv->dev);
 349                if (priv->meram_dev && priv->meram_dev->pdev)
 350                        pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
 351        }
 352}
 353
 354static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
 355{
 356        if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
 357                if (priv->meram_dev && priv->meram_dev->pdev)
 358                        pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
 359                pm_runtime_put(priv->dev);
 360                if (priv->dot_clk)
 361                        clk_disable(priv->dot_clk);
 362        }
 363}
 364
 365static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
 366                                       int clock_source)
 367{
 368        struct clk *clk;
 369        char *str;
 370
 371        switch (clock_source) {
 372        case LCDC_CLK_BUS:
 373                str = "bus_clk";
 374                priv->lddckr = LDDCKR_ICKSEL_BUS;
 375                break;
 376        case LCDC_CLK_PERIPHERAL:
 377                str = "peripheral_clk";
 378                priv->lddckr = LDDCKR_ICKSEL_MIPI;
 379                break;
 380        case LCDC_CLK_EXTERNAL:
 381                str = NULL;
 382                priv->lddckr = LDDCKR_ICKSEL_HDMI;
 383                break;
 384        default:
 385                return -EINVAL;
 386        }
 387
 388        if (str == NULL)
 389                return 0;
 390
 391        clk = clk_get(priv->dev, str);
 392        if (IS_ERR(clk)) {
 393                dev_err(priv->dev, "cannot get dot clock %s\n", str);
 394                return PTR_ERR(clk);
 395        }
 396
 397        priv->dot_clk = clk;
 398        return 0;
 399}
 400
 401/* -----------------------------------------------------------------------------
 402 * Display, panel and deferred I/O
 403 */
 404
 405static void lcdc_sys_write_index(void *handle, unsigned long data)
 406{
 407        struct sh_mobile_lcdc_chan *ch = handle;
 408
 409        lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
 410        lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 411        lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 412                   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 413        lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 414}
 415
 416static void lcdc_sys_write_data(void *handle, unsigned long data)
 417{
 418        struct sh_mobile_lcdc_chan *ch = handle;
 419
 420        lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
 421        lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 422        lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
 423                   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 424        lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 425}
 426
 427static unsigned long lcdc_sys_read_data(void *handle)
 428{
 429        struct sh_mobile_lcdc_chan *ch = handle;
 430
 431        lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
 432        lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 433        lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
 434                   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
 435        udelay(1);
 436        lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
 437
 438        return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
 439}
 440
 441static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
 442        lcdc_sys_write_index,
 443        lcdc_sys_write_data,
 444        lcdc_sys_read_data,
 445};
 446
 447static int sh_mobile_lcdc_sginit(struct fb_info *info,
 448                                  struct list_head *pagelist)
 449{
 450        struct sh_mobile_lcdc_chan *ch = info->par;
 451        unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
 452        struct page *page;
 453        int nr_pages = 0;
 454
 455        sg_init_table(ch->sglist, nr_pages_max);
 456
 457        list_for_each_entry(page, pagelist, lru)
 458                sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
 459
 460        return nr_pages;
 461}
 462
 463static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
 464                                       struct list_head *pagelist)
 465{
 466        struct sh_mobile_lcdc_chan *ch = info->par;
 467        const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 468
 469        /* enable clocks before accessing hardware */
 470        sh_mobile_lcdc_clk_on(ch->lcdc);
 471
 472        /*
 473         * It's possible to get here without anything on the pagelist via
 474         * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
 475         * invocation. In the former case, the acceleration routines are
 476         * stepped in to when using the framebuffer console causing the
 477         * workqueue to be scheduled without any dirty pages on the list.
 478         *
 479         * Despite this, a panel update is still needed given that the
 480         * acceleration routines have their own methods for writing in
 481         * that still need to be updated.
 482         *
 483         * The fsync() and empty pagelist case could be optimized for,
 484         * but we don't bother, as any application exhibiting such
 485         * behaviour is fundamentally broken anyways.
 486         */
 487        if (!list_empty(pagelist)) {
 488                unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
 489
 490                /* trigger panel update */
 491                dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
 492                if (panel->start_transfer)
 493                        panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 494                lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 495                dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
 496                             DMA_TO_DEVICE);
 497        } else {
 498                if (panel->start_transfer)
 499                        panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
 500                lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
 501        }
 502}
 503
 504static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
 505{
 506        struct fb_deferred_io *fbdefio = info->fbdefio;
 507
 508        if (fbdefio)
 509                schedule_delayed_work(&info->deferred_work, fbdefio->delay);
 510}
 511
 512static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
 513{
 514        const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 515
 516        if (ch->tx_dev) {
 517                int ret;
 518
 519                ret = ch->tx_dev->ops->display_on(ch->tx_dev);
 520                if (ret < 0)
 521                        return;
 522
 523                if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
 524                        ch->info->state = FBINFO_STATE_SUSPENDED;
 525        }
 526
 527        /* HDMI must be enabled before LCDC configuration */
 528        if (panel->display_on)
 529                panel->display_on();
 530}
 531
 532static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
 533{
 534        const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
 535
 536        if (panel->display_off)
 537                panel->display_off();
 538
 539        if (ch->tx_dev)
 540                ch->tx_dev->ops->display_off(ch->tx_dev);
 541}
 542
 543static bool
 544sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
 545                                const struct fb_videomode *new_mode)
 546{
 547        dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
 548                ch->display.mode.xres, ch->display.mode.yres,
 549                new_mode->xres, new_mode->yres);
 550
 551        /* It can be a different monitor with an equal video-mode */
 552        if (fb_mode_is_equal(&ch->display.mode, new_mode))
 553                return false;
 554
 555        dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
 556                ch->display.mode.yres, new_mode->yres);
 557        ch->display.mode = *new_mode;
 558
 559        return true;
 560}
 561
 562static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
 563                                    struct fb_info *info);
 564
 565static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
 566                                         enum sh_mobile_lcdc_entity_event event,
 567                                         const struct fb_videomode *mode,
 568                                         const struct fb_monspecs *monspec)
 569{
 570        struct fb_info *info = ch->info;
 571        struct fb_var_screeninfo var;
 572        int ret = 0;
 573
 574        switch (event) {
 575        case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
 576                /* HDMI plug in */
 577                if (lock_fb_info(info)) {
 578                        console_lock();
 579
 580                        ch->display.width = monspec->max_x * 10;
 581                        ch->display.height = monspec->max_y * 10;
 582
 583                        if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
 584                            info->state == FBINFO_STATE_RUNNING) {
 585                                /* First activation with the default monitor.
 586                                 * Just turn on, if we run a resume here, the
 587                                 * logo disappears.
 588                                 */
 589                                info->var.width = ch->display.width;
 590                                info->var.height = ch->display.height;
 591                                sh_mobile_lcdc_display_on(ch);
 592                        } else {
 593                                /* New monitor or have to wake up */
 594                                fb_set_suspend(info, 0);
 595                        }
 596
 597                        console_unlock();
 598                        unlock_fb_info(info);
 599                }
 600                break;
 601
 602        case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
 603                /* HDMI disconnect */
 604                if (lock_fb_info(info)) {
 605                        console_lock();
 606                        fb_set_suspend(info, 1);
 607                        console_unlock();
 608                        unlock_fb_info(info);
 609                }
 610                break;
 611
 612        case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
 613                /* Validate a proposed new mode */
 614                fb_videomode_to_var(&var, mode);
 615                var.bits_per_pixel = info->var.bits_per_pixel;
 616                var.grayscale = info->var.grayscale;
 617                ret = sh_mobile_lcdc_check_var(&var, info);
 618                break;
 619        }
 620
 621        return ret;
 622}
 623
 624/* -----------------------------------------------------------------------------
 625 * Format helpers
 626 */
 627
 628struct sh_mobile_lcdc_format_info {
 629        u32 fourcc;
 630        unsigned int bpp;
 631        bool yuv;
 632        u32 lddfr;
 633};
 634
 635static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 636        {
 637                .fourcc = V4L2_PIX_FMT_RGB565,
 638                .bpp = 16,
 639                .yuv = false,
 640                .lddfr = LDDFR_PKF_RGB16,
 641        }, {
 642                .fourcc = V4L2_PIX_FMT_BGR24,
 643                .bpp = 24,
 644                .yuv = false,
 645                .lddfr = LDDFR_PKF_RGB24,
 646        }, {
 647                .fourcc = V4L2_PIX_FMT_BGR32,
 648                .bpp = 32,
 649                .yuv = false,
 650                .lddfr = LDDFR_PKF_ARGB32,
 651        }, {
 652                .fourcc = V4L2_PIX_FMT_NV12,
 653                .bpp = 12,
 654                .yuv = true,
 655                .lddfr = LDDFR_CC | LDDFR_YF_420,
 656        }, {
 657                .fourcc = V4L2_PIX_FMT_NV21,
 658                .bpp = 12,
 659                .yuv = true,
 660                .lddfr = LDDFR_CC | LDDFR_YF_420,
 661        }, {
 662                .fourcc = V4L2_PIX_FMT_NV16,
 663                .bpp = 16,
 664                .yuv = true,
 665                .lddfr = LDDFR_CC | LDDFR_YF_422,
 666        }, {
 667                .fourcc = V4L2_PIX_FMT_NV61,
 668                .bpp = 16,
 669                .yuv = true,
 670                .lddfr = LDDFR_CC | LDDFR_YF_422,
 671        }, {
 672                .fourcc = V4L2_PIX_FMT_NV24,
 673                .bpp = 24,
 674                .yuv = true,
 675                .lddfr = LDDFR_CC | LDDFR_YF_444,
 676        }, {
 677                .fourcc = V4L2_PIX_FMT_NV42,
 678                .bpp = 24,
 679                .yuv = true,
 680                .lddfr = LDDFR_CC | LDDFR_YF_444,
 681        },
 682};
 683
 684static const struct sh_mobile_lcdc_format_info *
 685sh_mobile_format_info(u32 fourcc)
 686{
 687        unsigned int i;
 688
 689        for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 690                if (sh_mobile_format_infos[i].fourcc == fourcc)
 691                        return &sh_mobile_format_infos[i];
 692        }
 693
 694        return NULL;
 695}
 696
 697static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 698{
 699        if (var->grayscale > 1)
 700                return var->grayscale;
 701
 702        switch (var->bits_per_pixel) {
 703        case 16:
 704                return V4L2_PIX_FMT_RGB565;
 705        case 24:
 706                return V4L2_PIX_FMT_BGR24;
 707        case 32:
 708                return V4L2_PIX_FMT_BGR32;
 709        default:
 710                return 0;
 711        }
 712}
 713
 714static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 715{
 716        return var->grayscale > 1;
 717}
 718
 719/* -----------------------------------------------------------------------------
 720 * Start, stop and IRQ
 721 */
 722
 723static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 724{
 725        struct sh_mobile_lcdc_priv *priv = data;
 726        struct sh_mobile_lcdc_chan *ch;
 727        unsigned long ldintr;
 728        int is_sub;
 729        int k;
 730
 731        /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 732        ldintr = lcdc_read(priv, _LDINTR);
 733        lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 734
 735        /* figure out if this interrupt is for main or sub lcd */
 736        is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 737
 738        /* wake up channel and disable clocks */
 739        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 740                ch = &priv->ch[k];
 741
 742                if (!ch->enabled)
 743                        continue;
 744
 745                /* Frame End */
 746                if (ldintr & LDINTR_FS) {
 747                        if (is_sub == lcdc_chan_is_sublcd(ch)) {
 748                                ch->frame_end = 1;
 749                                wake_up(&ch->frame_end_wait);
 750
 751                                sh_mobile_lcdc_clk_off(priv);
 752                        }
 753                }
 754
 755                /* VSYNC End */
 756                if (ldintr & LDINTR_VES)
 757                        complete(&ch->vsync_completion);
 758        }
 759
 760        return IRQ_HANDLED;
 761}
 762
 763static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 764{
 765        unsigned long ldintr;
 766        int ret;
 767
 768        /* Enable VSync End interrupt and be careful not to acknowledge any
 769         * pending interrupt.
 770         */
 771        ldintr = lcdc_read(ch->lcdc, _LDINTR);
 772        ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 773        lcdc_write(ch->lcdc, _LDINTR, ldintr);
 774
 775        ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 776                                                        msecs_to_jiffies(100));
 777        if (!ret)
 778                return -ETIMEDOUT;
 779
 780        return 0;
 781}
 782
 783static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 784                                      int start)
 785{
 786        unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 787        int k;
 788
 789        /* start or stop the lcdc */
 790        if (start)
 791                lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 792        else
 793                lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 794
 795        /* wait until power is applied/stopped on all channels */
 796        for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 797                if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 798                        while (1) {
 799                                tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 800                                    & LDPMR_LPS;
 801                                if (start && tmp == LDPMR_LPS)
 802                                        break;
 803                                if (!start && tmp == 0)
 804                                        break;
 805                                cpu_relax();
 806                        }
 807
 808        if (!start)
 809                lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 810}
 811
 812static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 813{
 814        const struct fb_var_screeninfo *var = &ch->info->var;
 815        const struct fb_videomode *mode = &ch->display.mode;
 816        unsigned long h_total, hsync_pos, display_h_total;
 817        u32 tmp;
 818
 819        tmp = ch->ldmt1r_value;
 820        tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 821        tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 822        tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 823        tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 824        tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 825        tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 826        tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 827        lcdc_write_chan(ch, LDMT1R, tmp);
 828
 829        /* setup SYS bus */
 830        lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 831        lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 832
 833        /* horizontal configuration */
 834        h_total = mode->xres + mode->hsync_len + mode->left_margin
 835                + mode->right_margin;
 836        tmp = h_total / 8; /* HTCN */
 837        tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 838        lcdc_write_chan(ch, LDHCNR, tmp);
 839
 840        hsync_pos = mode->xres + mode->right_margin;
 841        tmp = hsync_pos / 8; /* HSYNP */
 842        tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 843        lcdc_write_chan(ch, LDHSYNR, tmp);
 844
 845        /* vertical configuration */
 846        tmp = mode->yres + mode->vsync_len + mode->upper_margin
 847            + mode->lower_margin; /* VTLN */
 848        tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 849        lcdc_write_chan(ch, LDVLNR, tmp);
 850
 851        tmp = mode->yres + mode->lower_margin; /* VSYNP */
 852        tmp |= mode->vsync_len << 16; /* VSYNW */
 853        lcdc_write_chan(ch, LDVSYNR, tmp);
 854
 855        /* Adjust horizontal synchronisation for HDMI */
 856        display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 857                        + mode->right_margin;
 858        tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 859            | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 860        lcdc_write_chan(ch, LDHAJR, tmp);
 861        lcdc_write_chan_mirror(ch, LDHAJR, tmp);
 862}
 863
 864static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 865{
 866        u32 format = 0;
 867
 868        if (!ovl->enabled) {
 869                lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 870                lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 871                lcdc_write(ovl->channel->lcdc, LDBCR,
 872                           LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 873                return;
 874        }
 875
 876        ovl->base_addr_y = ovl->dma_handle;
 877        ovl->base_addr_c = ovl->dma_handle
 878                         + ovl->xres_virtual * ovl->yres_virtual;
 879
 880        switch (ovl->mode) {
 881        case LCDC_OVERLAY_BLEND:
 882                format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 883                break;
 884
 885        case LCDC_OVERLAY_ROP3:
 886                format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 887                       | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 888                break;
 889        }
 890
 891        switch (ovl->format->fourcc) {
 892        case V4L2_PIX_FMT_RGB565:
 893        case V4L2_PIX_FMT_NV21:
 894        case V4L2_PIX_FMT_NV61:
 895        case V4L2_PIX_FMT_NV42:
 896                format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 897                break;
 898        case V4L2_PIX_FMT_BGR24:
 899        case V4L2_PIX_FMT_NV12:
 900        case V4L2_PIX_FMT_NV16:
 901        case V4L2_PIX_FMT_NV24:
 902                format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 903                break;
 904        case V4L2_PIX_FMT_BGR32:
 905        default:
 906                format |= LDBBSIFR_SWPL;
 907                break;
 908        }
 909
 910        switch (ovl->format->fourcc) {
 911        case V4L2_PIX_FMT_RGB565:
 912                format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 913                break;
 914        case V4L2_PIX_FMT_BGR24:
 915                format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 916                break;
 917        case V4L2_PIX_FMT_BGR32:
 918                format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 919                break;
 920        case V4L2_PIX_FMT_NV12:
 921        case V4L2_PIX_FMT_NV21:
 922                format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 923                break;
 924        case V4L2_PIX_FMT_NV16:
 925        case V4L2_PIX_FMT_NV61:
 926                format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 927                break;
 928        case V4L2_PIX_FMT_NV24:
 929        case V4L2_PIX_FMT_NV42:
 930                format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 931                break;
 932        }
 933
 934        lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 935
 936        lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 937
 938        lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 939                (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 940                (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 941        lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 942                (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 943                (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 944        lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 945                ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 946
 947        lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 948        lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 949
 950        lcdc_write(ovl->channel->lcdc, LDBCR,
 951                   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 952}
 953
 954/*
 955 * __sh_mobile_lcdc_start - Configure and start the LCDC
 956 * @priv: LCDC device
 957 *
 958 * Configure all enabled channels and start the LCDC device. All external
 959 * devices (clocks, MERAM, panels, ...) are not touched by this function.
 960 */
 961static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 962{
 963        struct sh_mobile_lcdc_chan *ch;
 964        unsigned long tmp;
 965        int k, m;
 966
 967        /* Enable LCDC channels. Read data from external memory, avoid using the
 968         * BEU for now.
 969         */
 970        lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 971
 972        /* Stop the LCDC first and disable all interrupts. */
 973        sh_mobile_lcdc_start_stop(priv, 0);
 974        lcdc_write(priv, _LDINTR, 0);
 975
 976        /* Configure power supply, dot clocks and start them. */
 977        tmp = priv->lddckr;
 978        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 979                ch = &priv->ch[k];
 980                if (!ch->enabled)
 981                        continue;
 982
 983                /* Power supply */
 984                lcdc_write_chan(ch, LDPMR, 0);
 985
 986                m = ch->cfg->clock_divider;
 987                if (!m)
 988                        continue;
 989
 990                /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 991                 * denominator.
 992                 */
 993                lcdc_write_chan(ch, LDDCKPAT1R, 0);
 994                lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 995
 996                if (m == 1)
 997                        m = LDDCKR_MOSEL;
 998                tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
 999        }
1000
1001        lcdc_write(priv, _LDDCKR, tmp);
1002        lcdc_write(priv, _LDDCKSTPR, 0);
1003        lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1004
1005        /* Setup geometry, format, frame buffer memory and operation mode. */
1006        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1007                ch = &priv->ch[k];
1008                if (!ch->enabled)
1009                        continue;
1010
1011                sh_mobile_lcdc_geometry(ch);
1012
1013                tmp = ch->format->lddfr;
1014
1015                if (ch->format->yuv) {
1016                        switch (ch->colorspace) {
1017                        case V4L2_COLORSPACE_REC709:
1018                                tmp |= LDDFR_CF1;
1019                                break;
1020                        case V4L2_COLORSPACE_JPEG:
1021                                tmp |= LDDFR_CF0;
1022                                break;
1023                        }
1024                }
1025
1026                lcdc_write_chan(ch, LDDFR, tmp);
1027                lcdc_write_chan(ch, LDMLSR, ch->line_size);
1028                lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1029                if (ch->format->yuv)
1030                        lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1031
1032                /* When using deferred I/O mode, configure the LCDC for one-shot
1033                 * operation and enable the frame end interrupt. Otherwise use
1034                 * continuous read mode.
1035                 */
1036                if (ch->ldmt1r_value & LDMT1R_IFM &&
1037                    ch->cfg->sys_bus_cfg.deferred_io_msec) {
1038                        lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1039                        lcdc_write(priv, _LDINTR, LDINTR_FE);
1040                } else {
1041                        lcdc_write_chan(ch, LDSM1R, 0);
1042                }
1043        }
1044
1045        /* Word and long word swap. */
1046        switch (priv->ch[0].format->fourcc) {
1047        case V4L2_PIX_FMT_RGB565:
1048        case V4L2_PIX_FMT_NV21:
1049        case V4L2_PIX_FMT_NV61:
1050        case V4L2_PIX_FMT_NV42:
1051                tmp = LDDDSR_LS | LDDDSR_WS;
1052                break;
1053        case V4L2_PIX_FMT_BGR24:
1054        case V4L2_PIX_FMT_NV12:
1055        case V4L2_PIX_FMT_NV16:
1056        case V4L2_PIX_FMT_NV24:
1057                tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1058                break;
1059        case V4L2_PIX_FMT_BGR32:
1060        default:
1061                tmp = LDDDSR_LS;
1062                break;
1063        }
1064        lcdc_write(priv, _LDDDSR, tmp);
1065
1066        /* Enable the display output. */
1067        lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1068        sh_mobile_lcdc_start_stop(priv, 1);
1069        priv->started = 1;
1070}
1071
1072static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1073{
1074        struct sh_mobile_meram_info *mdev = priv->meram_dev;
1075        struct sh_mobile_lcdc_chan *ch;
1076        unsigned long tmp;
1077        int ret;
1078        int k;
1079
1080        /* enable clocks before accessing the hardware */
1081        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1082                if (priv->ch[k].enabled)
1083                        sh_mobile_lcdc_clk_on(priv);
1084        }
1085
1086        /* reset */
1087        lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1088        lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1089
1090        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1091                const struct sh_mobile_lcdc_panel_cfg *panel;
1092
1093                ch = &priv->ch[k];
1094                if (!ch->enabled)
1095                        continue;
1096
1097                panel = &ch->cfg->panel_cfg;
1098                if (panel->setup_sys) {
1099                        ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1100                        if (ret)
1101                                return ret;
1102                }
1103        }
1104
1105        /* Compute frame buffer base address and pitch for each channel. */
1106        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1107                int pixelformat;
1108                void *cache;
1109
1110                ch = &priv->ch[k];
1111                if (!ch->enabled)
1112                        continue;
1113
1114                ch->base_addr_y = ch->dma_handle;
1115                ch->base_addr_c = ch->dma_handle
1116                                + ch->xres_virtual * ch->yres_virtual;
1117                ch->line_size = ch->pitch;
1118
1119                /* Enable MERAM if possible. */
1120                if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1121                        continue;
1122
1123                /* Free the allocated MERAM cache. */
1124                if (ch->cache) {
1125                        sh_mobile_meram_cache_free(mdev, ch->cache);
1126                        ch->cache = NULL;
1127                }
1128
1129                switch (ch->format->fourcc) {
1130                case V4L2_PIX_FMT_NV12:
1131                case V4L2_PIX_FMT_NV21:
1132                case V4L2_PIX_FMT_NV16:
1133                case V4L2_PIX_FMT_NV61:
1134                        pixelformat = SH_MOBILE_MERAM_PF_NV;
1135                        break;
1136                case V4L2_PIX_FMT_NV24:
1137                case V4L2_PIX_FMT_NV42:
1138                        pixelformat = SH_MOBILE_MERAM_PF_NV24;
1139                        break;
1140                case V4L2_PIX_FMT_RGB565:
1141                case V4L2_PIX_FMT_BGR24:
1142                case V4L2_PIX_FMT_BGR32:
1143                default:
1144                        pixelformat = SH_MOBILE_MERAM_PF_RGB;
1145                        break;
1146                }
1147
1148                cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1149                                        ch->pitch, ch->yres, pixelformat,
1150                                        &ch->line_size);
1151                if (!IS_ERR(cache)) {
1152                        sh_mobile_meram_cache_update(mdev, cache,
1153                                        ch->base_addr_y, ch->base_addr_c,
1154                                        &ch->base_addr_y, &ch->base_addr_c);
1155                        ch->cache = cache;
1156                }
1157        }
1158
1159        for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1160                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1161                sh_mobile_lcdc_overlay_setup(ovl);
1162        }
1163
1164        /* Start the LCDC. */
1165        __sh_mobile_lcdc_start(priv);
1166
1167        /* Setup deferred I/O, tell the board code to enable the panels, and
1168         * turn backlight on.
1169         */
1170        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1171                ch = &priv->ch[k];
1172                if (!ch->enabled)
1173                        continue;
1174
1175                tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1176                if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1177                        ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1178                        ch->defio.delay = msecs_to_jiffies(tmp);
1179                        ch->info->fbdefio = &ch->defio;
1180                        fb_deferred_io_init(ch->info);
1181                }
1182
1183                sh_mobile_lcdc_display_on(ch);
1184
1185                if (ch->bl) {
1186                        ch->bl->props.power = FB_BLANK_UNBLANK;
1187                        backlight_update_status(ch->bl);
1188                }
1189        }
1190
1191        return 0;
1192}
1193
1194static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1195{
1196        struct sh_mobile_lcdc_chan *ch;
1197        int k;
1198
1199        /* clean up deferred io and ask board code to disable panel */
1200        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1201                ch = &priv->ch[k];
1202                if (!ch->enabled)
1203                        continue;
1204
1205                /* deferred io mode:
1206                 * flush frame, and wait for frame end interrupt
1207                 * clean up deferred io and enable clock
1208                 */
1209                if (ch->info && ch->info->fbdefio) {
1210                        ch->frame_end = 0;
1211                        schedule_delayed_work(&ch->info->deferred_work, 0);
1212                        wait_event(ch->frame_end_wait, ch->frame_end);
1213                        fb_deferred_io_cleanup(ch->info);
1214                        ch->info->fbdefio = NULL;
1215                        sh_mobile_lcdc_clk_on(priv);
1216                }
1217
1218                if (ch->bl) {
1219                        ch->bl->props.power = FB_BLANK_POWERDOWN;
1220                        backlight_update_status(ch->bl);
1221                }
1222
1223                sh_mobile_lcdc_display_off(ch);
1224
1225                /* Free the MERAM cache. */
1226                if (ch->cache) {
1227                        sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1228                        ch->cache = 0;
1229                }
1230
1231        }
1232
1233        /* stop the lcdc */
1234        if (priv->started) {
1235                sh_mobile_lcdc_start_stop(priv, 0);
1236                priv->started = 0;
1237        }
1238
1239        /* stop clocks */
1240        for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1241                if (priv->ch[k].enabled)
1242                        sh_mobile_lcdc_clk_off(priv);
1243}
1244
1245static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1246                                      struct fb_info *info)
1247{
1248        if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1249                return -EINVAL;
1250
1251        /* Make sure the virtual resolution is at least as big as the visible
1252         * resolution.
1253         */
1254        if (var->xres_virtual < var->xres)
1255                var->xres_virtual = var->xres;
1256        if (var->yres_virtual < var->yres)
1257                var->yres_virtual = var->yres;
1258
1259        if (sh_mobile_format_is_fourcc(var)) {
1260                const struct sh_mobile_lcdc_format_info *format;
1261
1262                format = sh_mobile_format_info(var->grayscale);
1263                if (format == NULL)
1264                        return -EINVAL;
1265                var->bits_per_pixel = format->bpp;
1266
1267                /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1268                 * respectively.
1269                 */
1270                if (!format->yuv)
1271                        var->colorspace = V4L2_COLORSPACE_SRGB;
1272                else if (var->colorspace != V4L2_COLORSPACE_REC709)
1273                        var->colorspace = V4L2_COLORSPACE_JPEG;
1274        } else {
1275                if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1276                        var->bits_per_pixel = 16;
1277                        var->red.offset = 11;
1278                        var->red.length = 5;
1279                        var->green.offset = 5;
1280                        var->green.length = 6;
1281                        var->blue.offset = 0;
1282                        var->blue.length = 5;
1283                        var->transp.offset = 0;
1284                        var->transp.length = 0;
1285                } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1286                        var->bits_per_pixel = 24;
1287                        var->red.offset = 16;
1288                        var->red.length = 8;
1289                        var->green.offset = 8;
1290                        var->green.length = 8;
1291                        var->blue.offset = 0;
1292                        var->blue.length = 8;
1293                        var->transp.offset = 0;
1294                        var->transp.length = 0;
1295                } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1296                        var->bits_per_pixel = 32;
1297                        var->red.offset = 16;
1298                        var->red.length = 8;
1299                        var->green.offset = 8;
1300                        var->green.length = 8;
1301                        var->blue.offset = 0;
1302                        var->blue.length = 8;
1303                        var->transp.offset = 24;
1304                        var->transp.length = 8;
1305                } else
1306                        return -EINVAL;
1307
1308                var->red.msb_right = 0;
1309                var->green.msb_right = 0;
1310                var->blue.msb_right = 0;
1311                var->transp.msb_right = 0;
1312        }
1313
1314        /* Make sure we don't exceed our allocated memory. */
1315        if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1316            info->fix.smem_len)
1317                return -EINVAL;
1318
1319        return 0;
1320}
1321
1322/* -----------------------------------------------------------------------------
1323 * Frame buffer operations - Overlays
1324 */
1325
1326static ssize_t
1327overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1328{
1329        struct fb_info *info = dev_get_drvdata(dev);
1330        struct sh_mobile_lcdc_overlay *ovl = info->par;
1331
1332        return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1333}
1334
1335static ssize_t
1336overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1337                    const char *buf, size_t count)
1338{
1339        struct fb_info *info = dev_get_drvdata(dev);
1340        struct sh_mobile_lcdc_overlay *ovl = info->par;
1341        unsigned int alpha;
1342        char *endp;
1343
1344        alpha = simple_strtoul(buf, &endp, 10);
1345        if (isspace(*endp))
1346                endp++;
1347
1348        if (endp - buf != count)
1349                return -EINVAL;
1350
1351        if (alpha > 255)
1352                return -EINVAL;
1353
1354        if (ovl->alpha != alpha) {
1355                ovl->alpha = alpha;
1356
1357                if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1358                        sh_mobile_lcdc_overlay_setup(ovl);
1359        }
1360
1361        return count;
1362}
1363
1364static ssize_t
1365overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1366{
1367        struct fb_info *info = dev_get_drvdata(dev);
1368        struct sh_mobile_lcdc_overlay *ovl = info->par;
1369
1370        return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1371}
1372
1373static ssize_t
1374overlay_mode_store(struct device *dev, struct device_attribute *attr,
1375                   const char *buf, size_t count)
1376{
1377        struct fb_info *info = dev_get_drvdata(dev);
1378        struct sh_mobile_lcdc_overlay *ovl = info->par;
1379        unsigned int mode;
1380        char *endp;
1381
1382        mode = simple_strtoul(buf, &endp, 10);
1383        if (isspace(*endp))
1384                endp++;
1385
1386        if (endp - buf != count)
1387                return -EINVAL;
1388
1389        if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1390                return -EINVAL;
1391
1392        if (ovl->mode != mode) {
1393                ovl->mode = mode;
1394
1395                if (ovl->enabled)
1396                        sh_mobile_lcdc_overlay_setup(ovl);
1397        }
1398
1399        return count;
1400}
1401
1402static ssize_t
1403overlay_position_show(struct device *dev, struct device_attribute *attr,
1404                      char *buf)
1405{
1406        struct fb_info *info = dev_get_drvdata(dev);
1407        struct sh_mobile_lcdc_overlay *ovl = info->par;
1408
1409        return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1410}
1411
1412static ssize_t
1413overlay_position_store(struct device *dev, struct device_attribute *attr,
1414                       const char *buf, size_t count)
1415{
1416        struct fb_info *info = dev_get_drvdata(dev);
1417        struct sh_mobile_lcdc_overlay *ovl = info->par;
1418        char *endp;
1419        int pos_x;
1420        int pos_y;
1421
1422        pos_x = simple_strtol(buf, &endp, 10);
1423        if (*endp != ',')
1424                return -EINVAL;
1425
1426        pos_y = simple_strtol(endp + 1, &endp, 10);
1427        if (isspace(*endp))
1428                endp++;
1429
1430        if (endp - buf != count)
1431                return -EINVAL;
1432
1433        if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1434                ovl->pos_x = pos_x;
1435                ovl->pos_y = pos_y;
1436
1437                if (ovl->enabled)
1438                        sh_mobile_lcdc_overlay_setup(ovl);
1439        }
1440
1441        return count;
1442}
1443
1444static ssize_t
1445overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1446{
1447        struct fb_info *info = dev_get_drvdata(dev);
1448        struct sh_mobile_lcdc_overlay *ovl = info->par;
1449
1450        return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1451}
1452
1453static ssize_t
1454overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1455                    const char *buf, size_t count)
1456{
1457        struct fb_info *info = dev_get_drvdata(dev);
1458        struct sh_mobile_lcdc_overlay *ovl = info->par;
1459        unsigned int rop3;
1460        char *endp;
1461
1462        rop3 = !!simple_strtoul(buf, &endp, 10);
1463        if (isspace(*endp))
1464                endp++;
1465
1466        if (endp - buf != count)
1467                return -EINVAL;
1468
1469        if (rop3 > 255)
1470                return -EINVAL;
1471
1472        if (ovl->rop3 != rop3) {
1473                ovl->rop3 = rop3;
1474
1475                if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1476                        sh_mobile_lcdc_overlay_setup(ovl);
1477        }
1478
1479        return count;
1480}
1481
1482static const struct device_attribute overlay_sysfs_attrs[] = {
1483        __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1484               overlay_alpha_show, overlay_alpha_store),
1485        __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1486               overlay_mode_show, overlay_mode_store),
1487        __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1488               overlay_position_show, overlay_position_store),
1489        __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1490               overlay_rop3_show, overlay_rop3_store),
1491};
1492
1493static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1494        .id =           "SH Mobile LCDC",
1495        .type =         FB_TYPE_PACKED_PIXELS,
1496        .visual =       FB_VISUAL_TRUECOLOR,
1497        .accel =        FB_ACCEL_NONE,
1498        .xpanstep =     1,
1499        .ypanstep =     1,
1500        .ywrapstep =    0,
1501        .capabilities = FB_CAP_FOURCC,
1502};
1503
1504static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1505                                    struct fb_info *info)
1506{
1507        struct sh_mobile_lcdc_overlay *ovl = info->par;
1508        unsigned long base_addr_y;
1509        unsigned long base_addr_c;
1510        unsigned long y_offset;
1511        unsigned long c_offset;
1512
1513        if (!ovl->format->yuv) {
1514                y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1515                         * ovl->format->bpp / 8;
1516                c_offset = 0;
1517        } else {
1518                unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1519                unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1520
1521                y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1522                c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1523                         + var->xoffset * 2 / xsub;
1524        }
1525
1526        /* If the Y offset hasn't changed, the C offset hasn't either. There's
1527         * nothing to do in that case.
1528         */
1529        if (y_offset == ovl->pan_y_offset)
1530                return 0;
1531
1532        /* Set the source address for the next refresh */
1533        base_addr_y = ovl->dma_handle + y_offset;
1534        base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1535                    + c_offset;
1536
1537        ovl->base_addr_y = base_addr_y;
1538        ovl->base_addr_c = base_addr_c;
1539        ovl->pan_y_offset = y_offset;
1540
1541        lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1542
1543        lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1544        lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1545
1546        lcdc_write(ovl->channel->lcdc, LDBCR,
1547                   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1548
1549        return 0;
1550}
1551
1552static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1553                                      unsigned long arg)
1554{
1555        struct sh_mobile_lcdc_overlay *ovl = info->par;
1556
1557        switch (cmd) {
1558        case FBIO_WAITFORVSYNC:
1559                return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1560
1561        default:
1562                return -ENOIOCTLCMD;
1563        }
1564}
1565
1566static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1567                                          struct fb_info *info)
1568{
1569        return __sh_mobile_lcdc_check_var(var, info);
1570}
1571
1572static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1573{
1574        struct sh_mobile_lcdc_overlay *ovl = info->par;
1575
1576        ovl->format =
1577                sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1578
1579        ovl->xres = info->var.xres;
1580        ovl->xres_virtual = info->var.xres_virtual;
1581        ovl->yres = info->var.yres;
1582        ovl->yres_virtual = info->var.yres_virtual;
1583
1584        if (ovl->format->yuv)
1585                ovl->pitch = info->var.xres_virtual;
1586        else
1587                ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1588
1589        sh_mobile_lcdc_overlay_setup(ovl);
1590
1591        info->fix.line_length = ovl->pitch;
1592
1593        if (sh_mobile_format_is_fourcc(&info->var)) {
1594                info->fix.type = FB_TYPE_FOURCC;
1595                info->fix.visual = FB_VISUAL_FOURCC;
1596        } else {
1597                info->fix.type = FB_TYPE_PACKED_PIXELS;
1598                info->fix.visual = FB_VISUAL_TRUECOLOR;
1599        }
1600
1601        return 0;
1602}
1603
1604/* Overlay blanking. Disable the overlay when blanked. */
1605static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1606{
1607        struct sh_mobile_lcdc_overlay *ovl = info->par;
1608
1609        ovl->enabled = !blank;
1610        sh_mobile_lcdc_overlay_setup(ovl);
1611
1612        /* Prevent the backlight from receiving a blanking event by returning
1613         * a non-zero value.
1614         */
1615        return 1;
1616}
1617
1618static int
1619sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1620{
1621        struct sh_mobile_lcdc_overlay *ovl = info->par;
1622
1623        return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1624                                 ovl->dma_handle, ovl->fb_size);
1625}
1626
1627static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1628        .owner          = THIS_MODULE,
1629        .fb_read        = fb_sys_read,
1630        .fb_write       = fb_sys_write,
1631        .fb_fillrect    = sys_fillrect,
1632        .fb_copyarea    = sys_copyarea,
1633        .fb_imageblit   = sys_imageblit,
1634        .fb_blank       = sh_mobile_lcdc_overlay_blank,
1635        .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1636        .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1637        .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1638        .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1639        .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1640};
1641
1642static void
1643sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1644{
1645        struct fb_info *info = ovl->info;
1646
1647        if (info == NULL || info->dev == NULL)
1648                return;
1649
1650        unregister_framebuffer(ovl->info);
1651}
1652
1653static int
1654sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1655{
1656        struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1657        struct fb_info *info = ovl->info;
1658        unsigned int i;
1659        int ret;
1660
1661        if (info == NULL)
1662                return 0;
1663
1664        ret = register_framebuffer(info);
1665        if (ret < 0)
1666                return ret;
1667
1668        dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1669                 dev_name(lcdc->dev), ovl->index, info->var.xres,
1670                 info->var.yres, info->var.bits_per_pixel);
1671
1672        for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1673                ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1674                if (ret < 0)
1675                        return ret;
1676        }
1677
1678        return 0;
1679}
1680
1681static void
1682sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1683{
1684        struct fb_info *info = ovl->info;
1685
1686        if (info == NULL || info->device == NULL)
1687                return;
1688
1689        framebuffer_release(info);
1690}
1691
1692static int
1693sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1694{
1695        struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1696        struct fb_var_screeninfo *var;
1697        struct fb_info *info;
1698
1699        /* Allocate and initialize the frame buffer device. */
1700        info = framebuffer_alloc(0, priv->dev);
1701        if (info == NULL) {
1702                dev_err(priv->dev, "unable to allocate fb_info\n");
1703                return -ENOMEM;
1704        }
1705
1706        ovl->info = info;
1707
1708        info->flags = FBINFO_FLAG_DEFAULT;
1709        info->fbops = &sh_mobile_lcdc_overlay_ops;
1710        info->device = priv->dev;
1711        info->screen_base = ovl->fb_mem;
1712        info->par = ovl;
1713
1714        /* Initialize fixed screen information. Restrict pan to 2 lines steps
1715         * for NV12 and NV21.
1716         */
1717        info->fix = sh_mobile_lcdc_overlay_fix;
1718        snprintf(info->fix.id, sizeof(info->fix.id),
1719                 "SH Mobile LCDC Overlay %u", ovl->index);
1720        info->fix.smem_start = ovl->dma_handle;
1721        info->fix.smem_len = ovl->fb_size;
1722        info->fix.line_length = ovl->pitch;
1723
1724        if (ovl->format->yuv)
1725                info->fix.visual = FB_VISUAL_FOURCC;
1726        else
1727                info->fix.visual = FB_VISUAL_TRUECOLOR;
1728
1729        switch (ovl->format->fourcc) {
1730        case V4L2_PIX_FMT_NV12:
1731        case V4L2_PIX_FMT_NV21:
1732                info->fix.ypanstep = 2;
1733        case V4L2_PIX_FMT_NV16:
1734        case V4L2_PIX_FMT_NV61:
1735                info->fix.xpanstep = 2;
1736        }
1737
1738        /* Initialize variable screen information. */
1739        var = &info->var;
1740        memset(var, 0, sizeof(*var));
1741        var->xres = ovl->xres;
1742        var->yres = ovl->yres;
1743        var->xres_virtual = ovl->xres_virtual;
1744        var->yres_virtual = ovl->yres_virtual;
1745        var->activate = FB_ACTIVATE_NOW;
1746
1747        /* Use the legacy API by default for RGB formats, and the FOURCC API
1748         * for YUV formats.
1749         */
1750        if (!ovl->format->yuv)
1751                var->bits_per_pixel = ovl->format->bpp;
1752        else
1753                var->grayscale = ovl->format->fourcc;
1754
1755        return sh_mobile_lcdc_overlay_check_var(var, info);
1756}
1757
1758/* -----------------------------------------------------------------------------
1759 * Frame buffer operations - main frame buffer
1760 */
1761
1762static int sh_mobile_lcdc_setcolreg(u_int regno,
1763                                    u_int red, u_int green, u_int blue,
1764                                    u_int transp, struct fb_info *info)
1765{
1766        u32 *palette = info->pseudo_palette;
1767
1768        if (regno >= PALETTE_NR)
1769                return -EINVAL;
1770
1771        /* only FB_VISUAL_TRUECOLOR supported */
1772
1773        red >>= 16 - info->var.red.length;
1774        green >>= 16 - info->var.green.length;
1775        blue >>= 16 - info->var.blue.length;
1776        transp >>= 16 - info->var.transp.length;
1777
1778        palette[regno] = (red << info->var.red.offset) |
1779          (green << info->var.green.offset) |
1780          (blue << info->var.blue.offset) |
1781          (transp << info->var.transp.offset);
1782
1783        return 0;
1784}
1785
1786static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1787        .id =           "SH Mobile LCDC",
1788        .type =         FB_TYPE_PACKED_PIXELS,
1789        .visual =       FB_VISUAL_TRUECOLOR,
1790        .accel =        FB_ACCEL_NONE,
1791        .xpanstep =     1,
1792        .ypanstep =     1,
1793        .ywrapstep =    0,
1794        .capabilities = FB_CAP_FOURCC,
1795};
1796
1797static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1798                                    const struct fb_fillrect *rect)
1799{
1800        sys_fillrect(info, rect);
1801        sh_mobile_lcdc_deferred_io_touch(info);
1802}
1803
1804static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1805                                    const struct fb_copyarea *area)
1806{
1807        sys_copyarea(info, area);
1808        sh_mobile_lcdc_deferred_io_touch(info);
1809}
1810
1811static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1812                                     const struct fb_image *image)
1813{
1814        sys_imageblit(info, image);
1815        sh_mobile_lcdc_deferred_io_touch(info);
1816}
1817
1818static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1819                              struct fb_info *info)
1820{
1821        struct sh_mobile_lcdc_chan *ch = info->par;
1822        struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1823        unsigned long ldrcntr;
1824        unsigned long base_addr_y, base_addr_c;
1825        unsigned long y_offset;
1826        unsigned long c_offset;
1827
1828        if (!ch->format->yuv) {
1829                y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1830                         * ch->format->bpp / 8;
1831                c_offset = 0;
1832        } else {
1833                unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1834                unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1835
1836                y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1837                c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1838                         + var->xoffset * 2 / xsub;
1839        }
1840
1841        /* If the Y offset hasn't changed, the C offset hasn't either. There's
1842         * nothing to do in that case.
1843         */
1844        if (y_offset == ch->pan_y_offset)
1845                return 0;
1846
1847        /* Set the source address for the next refresh */
1848        base_addr_y = ch->dma_handle + y_offset;
1849        base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1850                    + c_offset;
1851
1852        if (ch->cache)
1853                sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1854                                             base_addr_y, base_addr_c,
1855                                             &base_addr_y, &base_addr_c);
1856
1857        ch->base_addr_y = base_addr_y;
1858        ch->base_addr_c = base_addr_c;
1859        ch->pan_y_offset = y_offset;
1860
1861        lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1862        if (ch->format->yuv)
1863                lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1864
1865        ldrcntr = lcdc_read(priv, _LDRCNTR);
1866        if (lcdc_chan_is_sublcd(ch))
1867                lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1868        else
1869                lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1870
1871
1872        sh_mobile_lcdc_deferred_io_touch(info);
1873
1874        return 0;
1875}
1876
1877static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1878                                unsigned long arg)
1879{
1880        struct sh_mobile_lcdc_chan *ch = info->par;
1881        int retval;
1882
1883        switch (cmd) {
1884        case FBIO_WAITFORVSYNC:
1885                retval = sh_mobile_lcdc_wait_for_vsync(ch);
1886                break;
1887
1888        default:
1889                retval = -ENOIOCTLCMD;
1890                break;
1891        }
1892        return retval;
1893}
1894
1895static void sh_mobile_fb_reconfig(struct fb_info *info)
1896{
1897        struct sh_mobile_lcdc_chan *ch = info->par;
1898        struct fb_var_screeninfo var;
1899        struct fb_videomode mode;
1900        struct fb_event event;
1901        int evnt = FB_EVENT_MODE_CHANGE_ALL;
1902
1903        if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1904                /* More framebuffer users are active */
1905                return;
1906
1907        fb_var_to_videomode(&mode, &info->var);
1908
1909        if (fb_mode_is_equal(&ch->display.mode, &mode))
1910                return;
1911
1912        /* Display has been re-plugged, framebuffer is free now, reconfigure */
1913        var = info->var;
1914        fb_videomode_to_var(&var, &ch->display.mode);
1915        var.width = ch->display.width;
1916        var.height = ch->display.height;
1917        var.activate = FB_ACTIVATE_NOW;
1918
1919        if (fb_set_var(info, &var) < 0)
1920                /* Couldn't reconfigure, hopefully, can continue as before */
1921                return;
1922
1923        /*
1924         * fb_set_var() calls the notifier change internally, only if
1925         * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1926         * user event, we have to call the chain ourselves.
1927         */
1928        event.info = info;
1929        event.data = &ch->display.mode;
1930        fb_notifier_call_chain(evnt, &event);
1931}
1932
1933/*
1934 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1935 * user == 1, or with console sem held, if user == 0.
1936 */
1937static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1938{
1939        struct sh_mobile_lcdc_chan *ch = info->par;
1940
1941        mutex_lock(&ch->open_lock);
1942        dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1943
1944        ch->use_count--;
1945
1946        /* Nothing to reconfigure, when called from fbcon */
1947        if (user) {
1948                console_lock();
1949                sh_mobile_fb_reconfig(info);
1950                console_unlock();
1951        }
1952
1953        mutex_unlock(&ch->open_lock);
1954
1955        return 0;
1956}
1957
1958static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1959{
1960        struct sh_mobile_lcdc_chan *ch = info->par;
1961
1962        mutex_lock(&ch->open_lock);
1963        ch->use_count++;
1964
1965        dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1966        mutex_unlock(&ch->open_lock);
1967
1968        return 0;
1969}
1970
1971static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1972                                    struct fb_info *info)
1973{
1974        struct sh_mobile_lcdc_chan *ch = info->par;
1975        struct sh_mobile_lcdc_priv *p = ch->lcdc;
1976        unsigned int best_dist = (unsigned int)-1;
1977        unsigned int best_xres = 0;
1978        unsigned int best_yres = 0;
1979        unsigned int i;
1980        int ret;
1981
1982        /* If board code provides us with a list of available modes, make sure
1983         * we use one of them. Find the mode closest to the requested one. The
1984         * distance between two modes is defined as the size of the
1985         * non-overlapping parts of the two rectangles.
1986         */
1987        for (i = 0; i < ch->cfg->num_modes; ++i) {
1988                const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1989                unsigned int dist;
1990
1991                /* We can only round up. */
1992                if (var->xres > mode->xres || var->yres > mode->yres)
1993                        continue;
1994
1995                dist = var->xres * var->yres + mode->xres * mode->yres
1996                     - 2 * min(var->xres, mode->xres)
1997                         * min(var->yres, mode->yres);
1998
1999                if (dist < best_dist) {
2000                        best_xres = mode->xres;
2001                        best_yres = mode->yres;
2002                        best_dist = dist;
2003                }
2004        }
2005
2006        /* If no available mode can be used, return an error. */
2007        if (ch->cfg->num_modes != 0) {
2008                if (best_dist == (unsigned int)-1)
2009                        return -EINVAL;
2010
2011                var->xres = best_xres;
2012                var->yres = best_yres;
2013        }
2014
2015        ret = __sh_mobile_lcdc_check_var(var, info);
2016        if (ret < 0)
2017                return ret;
2018
2019        /* only accept the forced_fourcc for dual channel configurations */
2020        if (p->forced_fourcc &&
2021            p->forced_fourcc != sh_mobile_format_fourcc(var))
2022                return -EINVAL;
2023
2024        return 0;
2025}
2026
2027static int sh_mobile_lcdc_set_par(struct fb_info *info)
2028{
2029        struct sh_mobile_lcdc_chan *ch = info->par;
2030        int ret;
2031
2032        sh_mobile_lcdc_stop(ch->lcdc);
2033
2034        ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2035        ch->colorspace = info->var.colorspace;
2036
2037        ch->xres = info->var.xres;
2038        ch->xres_virtual = info->var.xres_virtual;
2039        ch->yres = info->var.yres;
2040        ch->yres_virtual = info->var.yres_virtual;
2041
2042        if (ch->format->yuv)
2043                ch->pitch = info->var.xres_virtual;
2044        else
2045                ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2046
2047        ret = sh_mobile_lcdc_start(ch->lcdc);
2048        if (ret < 0)
2049                dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2050
2051        info->fix.line_length = ch->pitch;
2052
2053        if (sh_mobile_format_is_fourcc(&info->var)) {
2054                info->fix.type = FB_TYPE_FOURCC;
2055                info->fix.visual = FB_VISUAL_FOURCC;
2056        } else {
2057                info->fix.type = FB_TYPE_PACKED_PIXELS;
2058                info->fix.visual = FB_VISUAL_TRUECOLOR;
2059        }
2060
2061        return ret;
2062}
2063
2064/*
2065 * Screen blanking. Behavior is as follows:
2066 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2067 * FB_BLANK_NORMAL: screen blanked, clocks enabled
2068 * FB_BLANK_VSYNC,
2069 * FB_BLANK_HSYNC,
2070 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2071 */
2072static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2073{
2074        struct sh_mobile_lcdc_chan *ch = info->par;
2075        struct sh_mobile_lcdc_priv *p = ch->lcdc;
2076
2077        /* blank the screen? */
2078        if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2079                struct fb_fillrect rect = {
2080                        .width = ch->xres,
2081                        .height = ch->yres,
2082                };
2083                sh_mobile_lcdc_fillrect(info, &rect);
2084        }
2085        /* turn clocks on? */
2086        if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2087                sh_mobile_lcdc_clk_on(p);
2088        }
2089        /* turn clocks off? */
2090        if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2091                /* make sure the screen is updated with the black fill before
2092                 * switching the clocks off. one vsync is not enough since
2093                 * blanking may occur in the middle of a refresh. deferred io
2094                 * mode will reenable the clocks and update the screen in time,
2095                 * so it does not need this. */
2096                if (!info->fbdefio) {
2097                        sh_mobile_lcdc_wait_for_vsync(ch);
2098                        sh_mobile_lcdc_wait_for_vsync(ch);
2099                }
2100                sh_mobile_lcdc_clk_off(p);
2101        }
2102
2103        ch->blank_status = blank;
2104        return 0;
2105}
2106
2107static int
2108sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
2109{
2110        struct sh_mobile_lcdc_chan *ch = info->par;
2111
2112        return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
2113                                 ch->dma_handle, ch->fb_size);
2114}
2115
2116static struct fb_ops sh_mobile_lcdc_ops = {
2117        .owner          = THIS_MODULE,
2118        .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2119        .fb_read        = fb_sys_read,
2120        .fb_write       = fb_sys_write,
2121        .fb_fillrect    = sh_mobile_lcdc_fillrect,
2122        .fb_copyarea    = sh_mobile_lcdc_copyarea,
2123        .fb_imageblit   = sh_mobile_lcdc_imageblit,
2124        .fb_blank       = sh_mobile_lcdc_blank,
2125        .fb_pan_display = sh_mobile_lcdc_pan,
2126        .fb_ioctl       = sh_mobile_lcdc_ioctl,
2127        .fb_open        = sh_mobile_lcdc_open,
2128        .fb_release     = sh_mobile_lcdc_release,
2129        .fb_check_var   = sh_mobile_lcdc_check_var,
2130        .fb_set_par     = sh_mobile_lcdc_set_par,
2131        .fb_mmap        = sh_mobile_lcdc_mmap,
2132};
2133
2134static void
2135sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2136{
2137        if (ch->info && ch->info->dev)
2138                unregister_framebuffer(ch->info);
2139}
2140
2141static int
2142sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2143{
2144        struct fb_info *info = ch->info;
2145        int ret;
2146
2147        if (info->fbdefio) {
2148                ch->sglist = vmalloc(sizeof(struct scatterlist) *
2149                                     ch->fb_size >> PAGE_SHIFT);
2150                if (!ch->sglist) {
2151                        dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2152                        return -ENOMEM;
2153                }
2154        }
2155
2156        info->bl_dev = ch->bl;
2157
2158        ret = register_framebuffer(info);
2159        if (ret < 0)
2160                return ret;
2161
2162        dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2163                 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2164                 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2165                 info->var.bits_per_pixel);
2166
2167        /* deferred io mode: disable clock to save power */
2168        if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2169                sh_mobile_lcdc_clk_off(ch->lcdc);
2170
2171        return ret;
2172}
2173
2174static void
2175sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2176{
2177        struct fb_info *info = ch->info;
2178
2179        if (!info || !info->device)
2180                return;
2181
2182        if (ch->sglist)
2183                vfree(ch->sglist);
2184
2185        fb_dealloc_cmap(&info->cmap);
2186        framebuffer_release(info);
2187}
2188
2189static int
2190sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2191                               const struct fb_videomode *modes,
2192                               unsigned int num_modes)
2193{
2194        struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2195        struct fb_var_screeninfo *var;
2196        struct fb_info *info;
2197        int ret;
2198
2199        /* Allocate and initialize the frame buffer device. Create the modes
2200         * list and allocate the color map.
2201         */
2202        info = framebuffer_alloc(0, priv->dev);
2203        if (info == NULL) {
2204                dev_err(priv->dev, "unable to allocate fb_info\n");
2205                return -ENOMEM;
2206        }
2207
2208        ch->info = info;
2209
2210        info->flags = FBINFO_FLAG_DEFAULT;
2211        info->fbops = &sh_mobile_lcdc_ops;
2212        info->device = priv->dev;
2213        info->screen_base = ch->fb_mem;
2214        info->pseudo_palette = &ch->pseudo_palette;
2215        info->par = ch;
2216
2217        fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2218
2219        ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2220        if (ret < 0) {
2221                dev_err(priv->dev, "unable to allocate cmap\n");
2222                return ret;
2223        }
2224
2225        /* Initialize fixed screen information. Restrict pan to 2 lines steps
2226         * for NV12 and NV21.
2227         */
2228        info->fix = sh_mobile_lcdc_fix;
2229        info->fix.smem_start = ch->dma_handle;
2230        info->fix.smem_len = ch->fb_size;
2231        info->fix.line_length = ch->pitch;
2232
2233        if (ch->format->yuv)
2234                info->fix.visual = FB_VISUAL_FOURCC;
2235        else
2236                info->fix.visual = FB_VISUAL_TRUECOLOR;
2237
2238        switch (ch->format->fourcc) {
2239        case V4L2_PIX_FMT_NV12:
2240        case V4L2_PIX_FMT_NV21:
2241                info->fix.ypanstep = 2;
2242        case V4L2_PIX_FMT_NV16:
2243        case V4L2_PIX_FMT_NV61:
2244                info->fix.xpanstep = 2;
2245        }
2246
2247        /* Initialize variable screen information using the first mode as
2248         * default.
2249         */
2250        var = &info->var;
2251        fb_videomode_to_var(var, modes);
2252        var->width = ch->display.width;
2253        var->height = ch->display.height;
2254        var->xres_virtual = ch->xres_virtual;
2255        var->yres_virtual = ch->yres_virtual;
2256        var->activate = FB_ACTIVATE_NOW;
2257
2258        /* Use the legacy API by default for RGB formats, and the FOURCC API
2259         * for YUV formats.
2260         */
2261        if (!ch->format->yuv)
2262                var->bits_per_pixel = ch->format->bpp;
2263        else
2264                var->grayscale = ch->format->fourcc;
2265
2266        ret = sh_mobile_lcdc_check_var(var, info);
2267        if (ret)
2268                return ret;
2269
2270        return 0;
2271}
2272
2273/* -----------------------------------------------------------------------------
2274 * Backlight
2275 */
2276
2277static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2278{
2279        struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2280        int brightness = bdev->props.brightness;
2281
2282        if (bdev->props.power != FB_BLANK_UNBLANK ||
2283            bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2284                brightness = 0;
2285
2286        ch->bl_brightness = brightness;
2287        return ch->cfg->bl_info.set_brightness(brightness);
2288}
2289
2290static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2291{
2292        struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2293
2294        return ch->bl_brightness;
2295}
2296
2297static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2298                                   struct fb_info *info)
2299{
2300        return (info->bl_dev == bdev);
2301}
2302
2303static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2304        .options        = BL_CORE_SUSPENDRESUME,
2305        .update_status  = sh_mobile_lcdc_update_bl,
2306        .get_brightness = sh_mobile_lcdc_get_brightness,
2307        .check_fb       = sh_mobile_lcdc_check_fb,
2308};
2309
2310static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2311                                               struct sh_mobile_lcdc_chan *ch)
2312{
2313        struct backlight_device *bl;
2314
2315        bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2316                                       &sh_mobile_lcdc_bl_ops, NULL);
2317        if (IS_ERR(bl)) {
2318                dev_err(parent, "unable to register backlight device: %ld\n",
2319                        PTR_ERR(bl));
2320                return NULL;
2321        }
2322
2323        bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2324        bl->props.brightness = bl->props.max_brightness;
2325        backlight_update_status(bl);
2326
2327        return bl;
2328}
2329
2330static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2331{
2332        backlight_device_unregister(bdev);
2333}
2334
2335/* -----------------------------------------------------------------------------
2336 * Power management
2337 */
2338
2339static int sh_mobile_lcdc_suspend(struct device *dev)
2340{
2341        struct platform_device *pdev = to_platform_device(dev);
2342
2343        sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2344        return 0;
2345}
2346
2347static int sh_mobile_lcdc_resume(struct device *dev)
2348{
2349        struct platform_device *pdev = to_platform_device(dev);
2350
2351        return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2352}
2353
2354static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2355{
2356        struct platform_device *pdev = to_platform_device(dev);
2357        struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2358
2359        /* turn off LCDC hardware */
2360        lcdc_write(priv, _LDCNT1R, 0);
2361
2362        return 0;
2363}
2364
2365static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2366{
2367        struct platform_device *pdev = to_platform_device(dev);
2368        struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2369
2370        __sh_mobile_lcdc_start(priv);
2371
2372        return 0;
2373}
2374
2375static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2376        .suspend = sh_mobile_lcdc_suspend,
2377        .resume = sh_mobile_lcdc_resume,
2378        .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2379        .runtime_resume = sh_mobile_lcdc_runtime_resume,
2380};
2381
2382/* -----------------------------------------------------------------------------
2383 * Framebuffer notifier
2384 */
2385
2386/* locking: called with info->lock held */
2387static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2388                                 unsigned long action, void *data)
2389{
2390        struct fb_event *event = data;
2391        struct fb_info *info = event->info;
2392        struct sh_mobile_lcdc_chan *ch = info->par;
2393
2394        if (&ch->lcdc->notifier != nb)
2395                return NOTIFY_DONE;
2396
2397        dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2398                __func__, action, event->data);
2399
2400        switch(action) {
2401        case FB_EVENT_SUSPEND:
2402                sh_mobile_lcdc_display_off(ch);
2403                sh_mobile_lcdc_stop(ch->lcdc);
2404                break;
2405        case FB_EVENT_RESUME:
2406                mutex_lock(&ch->open_lock);
2407                sh_mobile_fb_reconfig(info);
2408                mutex_unlock(&ch->open_lock);
2409
2410                sh_mobile_lcdc_display_on(ch);
2411                sh_mobile_lcdc_start(ch->lcdc);
2412        }
2413
2414        return NOTIFY_OK;
2415}
2416
2417/* -----------------------------------------------------------------------------
2418 * Probe/remove and driver init/exit
2419 */
2420
2421static const struct fb_videomode default_720p = {
2422        .name = "HDMI 720p",
2423        .xres = 1280,
2424        .yres = 720,
2425
2426        .left_margin = 220,
2427        .right_margin = 110,
2428        .hsync_len = 40,
2429
2430        .upper_margin = 20,
2431        .lower_margin = 5,
2432        .vsync_len = 5,
2433
2434        .pixclock = 13468,
2435        .refresh = 60,
2436        .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2437};
2438
2439static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2440{
2441        struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2442        unsigned int i;
2443
2444        fb_unregister_client(&priv->notifier);
2445
2446        for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2447                sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2448        for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2449                sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2450
2451        sh_mobile_lcdc_stop(priv);
2452
2453        for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2454                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2455
2456                sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2457
2458                if (ovl->fb_mem)
2459                        dma_free_coherent(&pdev->dev, ovl->fb_size,
2460                                          ovl->fb_mem, ovl->dma_handle);
2461        }
2462
2463        for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2464                struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2465
2466                if (ch->tx_dev) {
2467                        ch->tx_dev->lcdc = NULL;
2468                        module_put(ch->cfg->tx_dev->dev.driver->owner);
2469                }
2470
2471                sh_mobile_lcdc_channel_fb_cleanup(ch);
2472
2473                if (ch->fb_mem)
2474                        dma_free_coherent(&pdev->dev, ch->fb_size,
2475                                          ch->fb_mem, ch->dma_handle);
2476        }
2477
2478        for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2479                struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2480
2481                if (ch->bl)
2482                        sh_mobile_lcdc_bl_remove(ch->bl);
2483                mutex_destroy(&ch->open_lock);
2484        }
2485
2486        if (priv->dot_clk) {
2487                pm_runtime_disable(&pdev->dev);
2488                clk_put(priv->dot_clk);
2489        }
2490
2491        if (priv->base)
2492                iounmap(priv->base);
2493
2494        if (priv->irq)
2495                free_irq(priv->irq, priv);
2496        kfree(priv);
2497        return 0;
2498}
2499
2500static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2501{
2502        int interface_type = ch->cfg->interface_type;
2503
2504        switch (interface_type) {
2505        case RGB8:
2506        case RGB9:
2507        case RGB12A:
2508        case RGB12B:
2509        case RGB16:
2510        case RGB18:
2511        case RGB24:
2512        case SYS8A:
2513        case SYS8B:
2514        case SYS8C:
2515        case SYS8D:
2516        case SYS9:
2517        case SYS12:
2518        case SYS16A:
2519        case SYS16B:
2520        case SYS16C:
2521        case SYS18:
2522        case SYS24:
2523                break;
2524        default:
2525                return -EINVAL;
2526        }
2527
2528        /* SUBLCD only supports SYS interface */
2529        if (lcdc_chan_is_sublcd(ch)) {
2530                if (!(interface_type & LDMT1R_IFM))
2531                        return -EINVAL;
2532
2533                interface_type &= ~LDMT1R_IFM;
2534        }
2535
2536        ch->ldmt1r_value = interface_type;
2537        return 0;
2538}
2539
2540static int
2541sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2542{
2543        const struct sh_mobile_lcdc_format_info *format;
2544        struct device *dev = ovl->channel->lcdc->dev;
2545        int ret;
2546
2547        if (ovl->cfg->fourcc == 0)
2548                return 0;
2549
2550        /* Validate the format. */
2551        format = sh_mobile_format_info(ovl->cfg->fourcc);
2552        if (format == NULL) {
2553                dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2554                return -EINVAL;
2555        }
2556
2557        ovl->enabled = false;
2558        ovl->mode = LCDC_OVERLAY_BLEND;
2559        ovl->alpha = 255;
2560        ovl->rop3 = 0;
2561        ovl->pos_x = 0;
2562        ovl->pos_y = 0;
2563
2564        /* The default Y virtual resolution is twice the panel size to allow for
2565         * double-buffering.
2566         */
2567        ovl->format = format;
2568        ovl->xres = ovl->cfg->max_xres;
2569        ovl->xres_virtual = ovl->xres;
2570        ovl->yres = ovl->cfg->max_yres;
2571        ovl->yres_virtual = ovl->yres * 2;
2572
2573        if (!format->yuv)
2574                ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2575        else
2576                ovl->pitch = ovl->xres_virtual;
2577
2578        /* Allocate frame buffer memory. */
2579        ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2580                       * format->bpp / 8 * 2;
2581        ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2582                                         GFP_KERNEL);
2583        if (!ovl->fb_mem) {
2584                dev_err(dev, "unable to allocate buffer\n");
2585                return -ENOMEM;
2586        }
2587
2588        ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2589        if (ret < 0)
2590                return ret;
2591
2592        return 0;
2593}
2594
2595static int
2596sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2597{
2598        const struct sh_mobile_lcdc_format_info *format;
2599        const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2600        struct device *dev = ch->lcdc->dev;
2601        const struct fb_videomode *max_mode;
2602        const struct fb_videomode *mode;
2603        unsigned int num_modes;
2604        unsigned int max_size;
2605        unsigned int i;
2606
2607        mutex_init(&ch->open_lock);
2608        ch->notify = sh_mobile_lcdc_display_notify;
2609
2610        /* Validate the format. */
2611        format = sh_mobile_format_info(cfg->fourcc);
2612        if (format == NULL) {
2613                dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2614                return -EINVAL;
2615        }
2616
2617        /* Iterate through the modes to validate them and find the highest
2618         * resolution.
2619         */
2620        max_mode = NULL;
2621        max_size = 0;
2622
2623        for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2624                unsigned int size = mode->yres * mode->xres;
2625
2626                /* NV12/NV21 buffers must have even number of lines */
2627                if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2628                     cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2629                        dev_err(dev, "yres must be multiple of 2 for "
2630                                "YCbCr420 mode.\n");
2631                        return -EINVAL;
2632                }
2633
2634                if (size > max_size) {
2635                        max_mode = mode;
2636                        max_size = size;
2637                }
2638        }
2639
2640        if (!max_size)
2641                max_size = MAX_XRES * MAX_YRES;
2642        else
2643                dev_dbg(dev, "Found largest videomode %ux%u\n",
2644                        max_mode->xres, max_mode->yres);
2645
2646        if (cfg->lcd_modes == NULL) {
2647                mode = &default_720p;
2648                num_modes = 1;
2649        } else {
2650                mode = cfg->lcd_modes;
2651                num_modes = cfg->num_modes;
2652        }
2653
2654        /* Use the first mode as default. The default Y virtual resolution is
2655         * twice the panel size to allow for double-buffering.
2656         */
2657        ch->format = format;
2658        ch->xres = mode->xres;
2659        ch->xres_virtual = mode->xres;
2660        ch->yres = mode->yres;
2661        ch->yres_virtual = mode->yres * 2;
2662
2663        if (!format->yuv) {
2664                ch->colorspace = V4L2_COLORSPACE_SRGB;
2665                ch->pitch = ch->xres_virtual * format->bpp / 8;
2666        } else {
2667                ch->colorspace = V4L2_COLORSPACE_REC709;
2668                ch->pitch = ch->xres_virtual;
2669        }
2670
2671        ch->display.width = cfg->panel_cfg.width;
2672        ch->display.height = cfg->panel_cfg.height;
2673        ch->display.mode = *mode;
2674
2675        /* Allocate frame buffer memory. */
2676        ch->fb_size = max_size * format->bpp / 8 * 2;
2677        ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2678                                        GFP_KERNEL);
2679        if (ch->fb_mem == NULL) {
2680                dev_err(dev, "unable to allocate buffer\n");
2681                return -ENOMEM;
2682        }
2683
2684        /* Initialize the transmitter device if present. */
2685        if (cfg->tx_dev) {
2686                if (!cfg->tx_dev->dev.driver ||
2687                    !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2688                        dev_warn(dev, "unable to get transmitter device\n");
2689                        return -EINVAL;
2690                }
2691                ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2692                ch->tx_dev->lcdc = ch;
2693                ch->tx_dev->def_mode = *mode;
2694        }
2695
2696        return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2697}
2698
2699static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2700{
2701        struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2702        struct sh_mobile_lcdc_priv *priv;
2703        struct resource *res;
2704        int num_channels;
2705        int error;
2706        int i;
2707
2708        if (!pdata) {
2709                dev_err(&pdev->dev, "no platform data defined\n");
2710                return -EINVAL;
2711        }
2712
2713        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2714        i = platform_get_irq(pdev, 0);
2715        if (!res || i < 0) {
2716                dev_err(&pdev->dev, "cannot get platform resources\n");
2717                return -ENOENT;
2718        }
2719
2720        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2721        if (!priv) {
2722                dev_err(&pdev->dev, "cannot allocate device data\n");
2723                return -ENOMEM;
2724        }
2725
2726        priv->dev = &pdev->dev;
2727        priv->meram_dev = pdata->meram_dev;
2728        platform_set_drvdata(pdev, priv);
2729
2730        error = request_irq(i, sh_mobile_lcdc_irq, 0,
2731                            dev_name(&pdev->dev), priv);
2732        if (error) {
2733                dev_err(&pdev->dev, "unable to request irq\n");
2734                goto err1;
2735        }
2736
2737        priv->irq = i;
2738        atomic_set(&priv->hw_usecnt, -1);
2739
2740        for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2741                struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2742
2743                ch->lcdc = priv;
2744                ch->cfg = &pdata->ch[i];
2745
2746                error = sh_mobile_lcdc_check_interface(ch);
2747                if (error) {
2748                        dev_err(&pdev->dev, "unsupported interface type\n");
2749                        goto err1;
2750                }
2751                init_waitqueue_head(&ch->frame_end_wait);
2752                init_completion(&ch->vsync_completion);
2753
2754                /* probe the backlight is there is one defined */
2755                if (ch->cfg->bl_info.max_brightness)
2756                        ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2757
2758                switch (pdata->ch[i].chan) {
2759                case LCDC_CHAN_MAINLCD:
2760                        ch->enabled = LDCNT2R_ME;
2761                        ch->reg_offs = lcdc_offs_mainlcd;
2762                        num_channels++;
2763                        break;
2764                case LCDC_CHAN_SUBLCD:
2765                        ch->enabled = LDCNT2R_SE;
2766                        ch->reg_offs = lcdc_offs_sublcd;
2767                        num_channels++;
2768                        break;
2769                }
2770        }
2771
2772        if (!num_channels) {
2773                dev_err(&pdev->dev, "no channels defined\n");
2774                error = -EINVAL;
2775                goto err1;
2776        }
2777
2778        /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2779        if (num_channels == 2)
2780                priv->forced_fourcc = pdata->ch[0].fourcc;
2781
2782        priv->base = ioremap_nocache(res->start, resource_size(res));
2783        if (!priv->base)
2784                goto err1;
2785
2786        error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2787        if (error) {
2788                dev_err(&pdev->dev, "unable to setup clocks\n");
2789                goto err1;
2790        }
2791
2792        /* Enable runtime PM. */
2793        pm_runtime_enable(&pdev->dev);
2794
2795        for (i = 0; i < num_channels; i++) {
2796                struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2797
2798                error = sh_mobile_lcdc_channel_init(ch);
2799                if (error)
2800                        goto err1;
2801        }
2802
2803        for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2804                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2805
2806                ovl->cfg = &pdata->overlays[i];
2807                ovl->channel = &priv->ch[0];
2808
2809                error = sh_mobile_lcdc_overlay_init(ovl);
2810                if (error)
2811                        goto err1;
2812        }
2813
2814        error = sh_mobile_lcdc_start(priv);
2815        if (error) {
2816                dev_err(&pdev->dev, "unable to start hardware\n");
2817                goto err1;
2818        }
2819
2820        for (i = 0; i < num_channels; i++) {
2821                struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2822
2823                error = sh_mobile_lcdc_channel_fb_register(ch);
2824                if (error)
2825                        goto err1;
2826        }
2827
2828        for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2829                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2830
2831                error = sh_mobile_lcdc_overlay_fb_register(ovl);
2832                if (error)
2833                        goto err1;
2834        }
2835
2836        /* Failure ignored */
2837        priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2838        fb_register_client(&priv->notifier);
2839
2840        return 0;
2841err1:
2842        sh_mobile_lcdc_remove(pdev);
2843
2844        return error;
2845}
2846
2847static struct platform_driver sh_mobile_lcdc_driver = {
2848        .driver         = {
2849                .name           = "sh_mobile_lcdc_fb",
2850                .owner          = THIS_MODULE,
2851                .pm             = &sh_mobile_lcdc_dev_pm_ops,
2852        },
2853        .probe          = sh_mobile_lcdc_probe,
2854        .remove         = sh_mobile_lcdc_remove,
2855};
2856
2857module_platform_driver(sh_mobile_lcdc_driver);
2858
2859MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2860MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2861MODULE_LICENSE("GPL v2");
2862
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