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_prepare_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_unprepare(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                console_lock();
 578                if (lock_fb_info(info)) {
 579
 580
 581                        ch->display.width = monspec->max_x * 10;
 582                        ch->display.height = monspec->max_y * 10;
 583
 584                        if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
 585                            info->state == FBINFO_STATE_RUNNING) {
 586                                /* First activation with the default monitor.
 587                                 * Just turn on, if we run a resume here, the
 588                                 * logo disappears.
 589                                 */
 590                                info->var.width = ch->display.width;
 591                                info->var.height = ch->display.height;
 592                                sh_mobile_lcdc_display_on(ch);
 593                        } else {
 594                                /* New monitor or have to wake up */
 595                                fb_set_suspend(info, 0);
 596                        }
 597
 598
 599                        unlock_fb_info(info);
 600                }
 601                console_unlock();
 602                break;
 603
 604        case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
 605                /* HDMI disconnect */
 606                console_lock();
 607                if (lock_fb_info(info)) {
 608                        fb_set_suspend(info, 1);
 609                        unlock_fb_info(info);
 610                }
 611                console_unlock();
 612                break;
 613
 614        case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
 615                /* Validate a proposed new mode */
 616                fb_videomode_to_var(&var, mode);
 617                var.bits_per_pixel = info->var.bits_per_pixel;
 618                var.grayscale = info->var.grayscale;
 619                ret = sh_mobile_lcdc_check_var(&var, info);
 620                break;
 621        }
 622
 623        return ret;
 624}
 625
 626/* -----------------------------------------------------------------------------
 627 * Format helpers
 628 */
 629
 630struct sh_mobile_lcdc_format_info {
 631        u32 fourcc;
 632        unsigned int bpp;
 633        bool yuv;
 634        u32 lddfr;
 635};
 636
 637static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
 638        {
 639                .fourcc = V4L2_PIX_FMT_RGB565,
 640                .bpp = 16,
 641                .yuv = false,
 642                .lddfr = LDDFR_PKF_RGB16,
 643        }, {
 644                .fourcc = V4L2_PIX_FMT_BGR24,
 645                .bpp = 24,
 646                .yuv = false,
 647                .lddfr = LDDFR_PKF_RGB24,
 648        }, {
 649                .fourcc = V4L2_PIX_FMT_BGR32,
 650                .bpp = 32,
 651                .yuv = false,
 652                .lddfr = LDDFR_PKF_ARGB32,
 653        }, {
 654                .fourcc = V4L2_PIX_FMT_NV12,
 655                .bpp = 12,
 656                .yuv = true,
 657                .lddfr = LDDFR_CC | LDDFR_YF_420,
 658        }, {
 659                .fourcc = V4L2_PIX_FMT_NV21,
 660                .bpp = 12,
 661                .yuv = true,
 662                .lddfr = LDDFR_CC | LDDFR_YF_420,
 663        }, {
 664                .fourcc = V4L2_PIX_FMT_NV16,
 665                .bpp = 16,
 666                .yuv = true,
 667                .lddfr = LDDFR_CC | LDDFR_YF_422,
 668        }, {
 669                .fourcc = V4L2_PIX_FMT_NV61,
 670                .bpp = 16,
 671                .yuv = true,
 672                .lddfr = LDDFR_CC | LDDFR_YF_422,
 673        }, {
 674                .fourcc = V4L2_PIX_FMT_NV24,
 675                .bpp = 24,
 676                .yuv = true,
 677                .lddfr = LDDFR_CC | LDDFR_YF_444,
 678        }, {
 679                .fourcc = V4L2_PIX_FMT_NV42,
 680                .bpp = 24,
 681                .yuv = true,
 682                .lddfr = LDDFR_CC | LDDFR_YF_444,
 683        },
 684};
 685
 686static const struct sh_mobile_lcdc_format_info *
 687sh_mobile_format_info(u32 fourcc)
 688{
 689        unsigned int i;
 690
 691        for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
 692                if (sh_mobile_format_infos[i].fourcc == fourcc)
 693                        return &sh_mobile_format_infos[i];
 694        }
 695
 696        return NULL;
 697}
 698
 699static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
 700{
 701        if (var->grayscale > 1)
 702                return var->grayscale;
 703
 704        switch (var->bits_per_pixel) {
 705        case 16:
 706                return V4L2_PIX_FMT_RGB565;
 707        case 24:
 708                return V4L2_PIX_FMT_BGR24;
 709        case 32:
 710                return V4L2_PIX_FMT_BGR32;
 711        default:
 712                return 0;
 713        }
 714}
 715
 716static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
 717{
 718        return var->grayscale > 1;
 719}
 720
 721/* -----------------------------------------------------------------------------
 722 * Start, stop and IRQ
 723 */
 724
 725static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
 726{
 727        struct sh_mobile_lcdc_priv *priv = data;
 728        struct sh_mobile_lcdc_chan *ch;
 729        unsigned long ldintr;
 730        int is_sub;
 731        int k;
 732
 733        /* Acknowledge interrupts and disable further VSYNC End IRQs. */
 734        ldintr = lcdc_read(priv, _LDINTR);
 735        lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
 736
 737        /* figure out if this interrupt is for main or sub lcd */
 738        is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
 739
 740        /* wake up channel and disable clocks */
 741        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 742                ch = &priv->ch[k];
 743
 744                if (!ch->enabled)
 745                        continue;
 746
 747                /* Frame End */
 748                if (ldintr & LDINTR_FS) {
 749                        if (is_sub == lcdc_chan_is_sublcd(ch)) {
 750                                ch->frame_end = 1;
 751                                wake_up(&ch->frame_end_wait);
 752
 753                                sh_mobile_lcdc_clk_off(priv);
 754                        }
 755                }
 756
 757                /* VSYNC End */
 758                if (ldintr & LDINTR_VES)
 759                        complete(&ch->vsync_completion);
 760        }
 761
 762        return IRQ_HANDLED;
 763}
 764
 765static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
 766{
 767        unsigned long ldintr;
 768        int ret;
 769
 770        /* Enable VSync End interrupt and be careful not to acknowledge any
 771         * pending interrupt.
 772         */
 773        ldintr = lcdc_read(ch->lcdc, _LDINTR);
 774        ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
 775        lcdc_write(ch->lcdc, _LDINTR, ldintr);
 776
 777        ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
 778                                                        msecs_to_jiffies(100));
 779        if (!ret)
 780                return -ETIMEDOUT;
 781
 782        return 0;
 783}
 784
 785static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
 786                                      int start)
 787{
 788        unsigned long tmp = lcdc_read(priv, _LDCNT2R);
 789        int k;
 790
 791        /* start or stop the lcdc */
 792        if (start)
 793                lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
 794        else
 795                lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
 796
 797        /* wait until power is applied/stopped on all channels */
 798        for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
 799                if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
 800                        while (1) {
 801                                tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
 802                                    & LDPMR_LPS;
 803                                if (start && tmp == LDPMR_LPS)
 804                                        break;
 805                                if (!start && tmp == 0)
 806                                        break;
 807                                cpu_relax();
 808                        }
 809
 810        if (!start)
 811                lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
 812}
 813
 814static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 815{
 816        const struct fb_var_screeninfo *var = &ch->info->var;
 817        const struct fb_videomode *mode = &ch->display.mode;
 818        unsigned long h_total, hsync_pos, display_h_total;
 819        u32 tmp;
 820
 821        tmp = ch->ldmt1r_value;
 822        tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
 823        tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
 824        tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
 825        tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
 826        tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
 827        tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
 828        tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
 829        lcdc_write_chan(ch, LDMT1R, tmp);
 830
 831        /* setup SYS bus */
 832        lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
 833        lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
 834
 835        /* horizontal configuration */
 836        h_total = mode->xres + mode->hsync_len + mode->left_margin
 837                + mode->right_margin;
 838        tmp = h_total / 8; /* HTCN */
 839        tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
 840        lcdc_write_chan(ch, LDHCNR, tmp);
 841
 842        hsync_pos = mode->xres + mode->right_margin;
 843        tmp = hsync_pos / 8; /* HSYNP */
 844        tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
 845        lcdc_write_chan(ch, LDHSYNR, tmp);
 846
 847        /* vertical configuration */
 848        tmp = mode->yres + mode->vsync_len + mode->upper_margin
 849            + mode->lower_margin; /* VTLN */
 850        tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
 851        lcdc_write_chan(ch, LDVLNR, tmp);
 852
 853        tmp = mode->yres + mode->lower_margin; /* VSYNP */
 854        tmp |= mode->vsync_len << 16; /* VSYNW */
 855        lcdc_write_chan(ch, LDVSYNR, tmp);
 856
 857        /* Adjust horizontal synchronisation for HDMI */
 858        display_h_total = mode->xres + mode->hsync_len + mode->left_margin
 859                        + mode->right_margin;
 860        tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
 861            | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
 862        lcdc_write_chan(ch, LDHAJR, tmp);
 863        lcdc_write_chan_mirror(ch, LDHAJR, tmp);
 864}
 865
 866static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
 867{
 868        u32 format = 0;
 869
 870        if (!ovl->enabled) {
 871                lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 872                lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
 873                lcdc_write(ovl->channel->lcdc, LDBCR,
 874                           LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 875                return;
 876        }
 877
 878        ovl->base_addr_y = ovl->dma_handle;
 879        ovl->base_addr_c = ovl->dma_handle
 880                         + ovl->xres_virtual * ovl->yres_virtual;
 881
 882        switch (ovl->mode) {
 883        case LCDC_OVERLAY_BLEND:
 884                format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
 885                break;
 886
 887        case LCDC_OVERLAY_ROP3:
 888                format = LDBBSIFR_EN | LDBBSIFR_BRSEL
 889                       | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
 890                break;
 891        }
 892
 893        switch (ovl->format->fourcc) {
 894        case V4L2_PIX_FMT_RGB565:
 895        case V4L2_PIX_FMT_NV21:
 896        case V4L2_PIX_FMT_NV61:
 897        case V4L2_PIX_FMT_NV42:
 898                format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
 899                break;
 900        case V4L2_PIX_FMT_BGR24:
 901        case V4L2_PIX_FMT_NV12:
 902        case V4L2_PIX_FMT_NV16:
 903        case V4L2_PIX_FMT_NV24:
 904                format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
 905                break;
 906        case V4L2_PIX_FMT_BGR32:
 907        default:
 908                format |= LDBBSIFR_SWPL;
 909                break;
 910        }
 911
 912        switch (ovl->format->fourcc) {
 913        case V4L2_PIX_FMT_RGB565:
 914                format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
 915                break;
 916        case V4L2_PIX_FMT_BGR24:
 917                format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
 918                break;
 919        case V4L2_PIX_FMT_BGR32:
 920                format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
 921                break;
 922        case V4L2_PIX_FMT_NV12:
 923        case V4L2_PIX_FMT_NV21:
 924                format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
 925                break;
 926        case V4L2_PIX_FMT_NV16:
 927        case V4L2_PIX_FMT_NV61:
 928                format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
 929                break;
 930        case V4L2_PIX_FMT_NV24:
 931        case V4L2_PIX_FMT_NV42:
 932                format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
 933                break;
 934        }
 935
 936        lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
 937
 938        lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
 939
 940        lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
 941                (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
 942                (ovl->xres << LDBBSSZR_BHSS_SHIFT));
 943        lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
 944                (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
 945                (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
 946        lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
 947                ovl->pitch << LDBBSMWR_BSMW_SHIFT);
 948
 949        lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
 950        lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
 951
 952        lcdc_write(ovl->channel->lcdc, LDBCR,
 953                   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
 954}
 955
 956/*
 957 * __sh_mobile_lcdc_start - Configure and start the LCDC
 958 * @priv: LCDC device
 959 *
 960 * Configure all enabled channels and start the LCDC device. All external
 961 * devices (clocks, MERAM, panels, ...) are not touched by this function.
 962 */
 963static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
 964{
 965        struct sh_mobile_lcdc_chan *ch;
 966        unsigned long tmp;
 967        int k, m;
 968
 969        /* Enable LCDC channels. Read data from external memory, avoid using the
 970         * BEU for now.
 971         */
 972        lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
 973
 974        /* Stop the LCDC first and disable all interrupts. */
 975        sh_mobile_lcdc_start_stop(priv, 0);
 976        lcdc_write(priv, _LDINTR, 0);
 977
 978        /* Configure power supply, dot clocks and start them. */
 979        tmp = priv->lddckr;
 980        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
 981                ch = &priv->ch[k];
 982                if (!ch->enabled)
 983                        continue;
 984
 985                /* Power supply */
 986                lcdc_write_chan(ch, LDPMR, 0);
 987
 988                m = ch->cfg->clock_divider;
 989                if (!m)
 990                        continue;
 991
 992                /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
 993                 * denominator.
 994                 */
 995                lcdc_write_chan(ch, LDDCKPAT1R, 0);
 996                lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
 997
 998                if (m == 1)
 999                        m = LDDCKR_MOSEL;
1000                tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
1001        }
1002
1003        lcdc_write(priv, _LDDCKR, tmp);
1004        lcdc_write(priv, _LDDCKSTPR, 0);
1005        lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1006
1007        /* Setup geometry, format, frame buffer memory and operation mode. */
1008        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1009                ch = &priv->ch[k];
1010                if (!ch->enabled)
1011                        continue;
1012
1013                sh_mobile_lcdc_geometry(ch);
1014
1015                tmp = ch->format->lddfr;
1016
1017                if (ch->format->yuv) {
1018                        switch (ch->colorspace) {
1019                        case V4L2_COLORSPACE_REC709:
1020                                tmp |= LDDFR_CF1;
1021                                break;
1022                        case V4L2_COLORSPACE_JPEG:
1023                                tmp |= LDDFR_CF0;
1024                                break;
1025                        }
1026                }
1027
1028                lcdc_write_chan(ch, LDDFR, tmp);
1029                lcdc_write_chan(ch, LDMLSR, ch->line_size);
1030                lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1031                if (ch->format->yuv)
1032                        lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1033
1034                /* When using deferred I/O mode, configure the LCDC for one-shot
1035                 * operation and enable the frame end interrupt. Otherwise use
1036                 * continuous read mode.
1037                 */
1038                if (ch->ldmt1r_value & LDMT1R_IFM &&
1039                    ch->cfg->sys_bus_cfg.deferred_io_msec) {
1040                        lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1041                        lcdc_write(priv, _LDINTR, LDINTR_FE);
1042                } else {
1043                        lcdc_write_chan(ch, LDSM1R, 0);
1044                }
1045        }
1046
1047        /* Word and long word swap. */
1048        switch (priv->ch[0].format->fourcc) {
1049        case V4L2_PIX_FMT_RGB565:
1050        case V4L2_PIX_FMT_NV21:
1051        case V4L2_PIX_FMT_NV61:
1052        case V4L2_PIX_FMT_NV42:
1053                tmp = LDDDSR_LS | LDDDSR_WS;
1054                break;
1055        case V4L2_PIX_FMT_BGR24:
1056        case V4L2_PIX_FMT_NV12:
1057        case V4L2_PIX_FMT_NV16:
1058        case V4L2_PIX_FMT_NV24:
1059                tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1060                break;
1061        case V4L2_PIX_FMT_BGR32:
1062        default:
1063                tmp = LDDDSR_LS;
1064                break;
1065        }
1066        lcdc_write(priv, _LDDDSR, tmp);
1067
1068        /* Enable the display output. */
1069        lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1070        sh_mobile_lcdc_start_stop(priv, 1);
1071        priv->started = 1;
1072}
1073
1074static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1075{
1076        struct sh_mobile_meram_info *mdev = priv->meram_dev;
1077        struct sh_mobile_lcdc_chan *ch;
1078        unsigned long tmp;
1079        int ret;
1080        int k;
1081
1082        /* enable clocks before accessing the hardware */
1083        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1084                if (priv->ch[k].enabled)
1085                        sh_mobile_lcdc_clk_on(priv);
1086        }
1087
1088        /* reset */
1089        lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1090        lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1091
1092        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1093                const struct sh_mobile_lcdc_panel_cfg *panel;
1094
1095                ch = &priv->ch[k];
1096                if (!ch->enabled)
1097                        continue;
1098
1099                panel = &ch->cfg->panel_cfg;
1100                if (panel->setup_sys) {
1101                        ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1102                        if (ret)
1103                                return ret;
1104                }
1105        }
1106
1107        /* Compute frame buffer base address and pitch for each channel. */
1108        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1109                int pixelformat;
1110                void *cache;
1111
1112                ch = &priv->ch[k];
1113                if (!ch->enabled)
1114                        continue;
1115
1116                ch->base_addr_y = ch->dma_handle;
1117                ch->base_addr_c = ch->dma_handle
1118                                + ch->xres_virtual * ch->yres_virtual;
1119                ch->line_size = ch->pitch;
1120
1121                /* Enable MERAM if possible. */
1122                if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1123                        continue;
1124
1125                /* Free the allocated MERAM cache. */
1126                if (ch->cache) {
1127                        sh_mobile_meram_cache_free(mdev, ch->cache);
1128                        ch->cache = NULL;
1129                }
1130
1131                switch (ch->format->fourcc) {
1132                case V4L2_PIX_FMT_NV12:
1133                case V4L2_PIX_FMT_NV21:
1134                case V4L2_PIX_FMT_NV16:
1135                case V4L2_PIX_FMT_NV61:
1136                        pixelformat = SH_MOBILE_MERAM_PF_NV;
1137                        break;
1138                case V4L2_PIX_FMT_NV24:
1139                case V4L2_PIX_FMT_NV42:
1140                        pixelformat = SH_MOBILE_MERAM_PF_NV24;
1141                        break;
1142                case V4L2_PIX_FMT_RGB565:
1143                case V4L2_PIX_FMT_BGR24:
1144                case V4L2_PIX_FMT_BGR32:
1145                default:
1146                        pixelformat = SH_MOBILE_MERAM_PF_RGB;
1147                        break;
1148                }
1149
1150                cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1151                                        ch->pitch, ch->yres, pixelformat,
1152                                        &ch->line_size);
1153                if (!IS_ERR(cache)) {
1154                        sh_mobile_meram_cache_update(mdev, cache,
1155                                        ch->base_addr_y, ch->base_addr_c,
1156                                        &ch->base_addr_y, &ch->base_addr_c);
1157                        ch->cache = cache;
1158                }
1159        }
1160
1161        for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1162                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1163                sh_mobile_lcdc_overlay_setup(ovl);
1164        }
1165
1166        /* Start the LCDC. */
1167        __sh_mobile_lcdc_start(priv);
1168
1169        /* Setup deferred I/O, tell the board code to enable the panels, and
1170         * turn backlight on.
1171         */
1172        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1173                ch = &priv->ch[k];
1174                if (!ch->enabled)
1175                        continue;
1176
1177                tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1178                if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1179                        ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1180                        ch->defio.delay = msecs_to_jiffies(tmp);
1181                        ch->info->fbdefio = &ch->defio;
1182                        fb_deferred_io_init(ch->info);
1183                }
1184
1185                sh_mobile_lcdc_display_on(ch);
1186
1187                if (ch->bl) {
1188                        ch->bl->props.power = FB_BLANK_UNBLANK;
1189                        backlight_update_status(ch->bl);
1190                }
1191        }
1192
1193        return 0;
1194}
1195
1196static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1197{
1198        struct sh_mobile_lcdc_chan *ch;
1199        int k;
1200
1201        /* clean up deferred io and ask board code to disable panel */
1202        for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1203                ch = &priv->ch[k];
1204                if (!ch->enabled)
1205                        continue;
1206
1207                /* deferred io mode:
1208                 * flush frame, and wait for frame end interrupt
1209                 * clean up deferred io and enable clock
1210                 */
1211                if (ch->info && ch->info->fbdefio) {
1212                        ch->frame_end = 0;
1213                        schedule_delayed_work(&ch->info->deferred_work, 0);
1214                        wait_event(ch->frame_end_wait, ch->frame_end);
1215                        fb_deferred_io_cleanup(ch->info);
1216                        ch->info->fbdefio = NULL;
1217                        sh_mobile_lcdc_clk_on(priv);
1218                }
1219
1220                if (ch->bl) {
1221                        ch->bl->props.power = FB_BLANK_POWERDOWN;
1222                        backlight_update_status(ch->bl);
1223                }
1224
1225                sh_mobile_lcdc_display_off(ch);
1226
1227                /* Free the MERAM cache. */
1228                if (ch->cache) {
1229                        sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1230                        ch->cache = 0;
1231                }
1232
1233        }
1234
1235        /* stop the lcdc */
1236        if (priv->started) {
1237                sh_mobile_lcdc_start_stop(priv, 0);
1238                priv->started = 0;
1239        }
1240
1241        /* stop clocks */
1242        for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1243                if (priv->ch[k].enabled)
1244                        sh_mobile_lcdc_clk_off(priv);
1245}
1246
1247static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1248                                      struct fb_info *info)
1249{
1250        if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1251                return -EINVAL;
1252
1253        /* Make sure the virtual resolution is at least as big as the visible
1254         * resolution.
1255         */
1256        if (var->xres_virtual < var->xres)
1257                var->xres_virtual = var->xres;
1258        if (var->yres_virtual < var->yres)
1259                var->yres_virtual = var->yres;
1260
1261        if (sh_mobile_format_is_fourcc(var)) {
1262                const struct sh_mobile_lcdc_format_info *format;
1263
1264                format = sh_mobile_format_info(var->grayscale);
1265                if (format == NULL)
1266                        return -EINVAL;
1267                var->bits_per_pixel = format->bpp;
1268
1269                /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1270                 * respectively.
1271                 */
1272                if (!format->yuv)
1273                        var->colorspace = V4L2_COLORSPACE_SRGB;
1274                else if (var->colorspace != V4L2_COLORSPACE_REC709)
1275                        var->colorspace = V4L2_COLORSPACE_JPEG;
1276        } else {
1277                if (var->bits_per_pixel <= 16) {                /* RGB 565 */
1278                        var->bits_per_pixel = 16;
1279                        var->red.offset = 11;
1280                        var->red.length = 5;
1281                        var->green.offset = 5;
1282                        var->green.length = 6;
1283                        var->blue.offset = 0;
1284                        var->blue.length = 5;
1285                        var->transp.offset = 0;
1286                        var->transp.length = 0;
1287                } else if (var->bits_per_pixel <= 24) {         /* RGB 888 */
1288                        var->bits_per_pixel = 24;
1289                        var->red.offset = 16;
1290                        var->red.length = 8;
1291                        var->green.offset = 8;
1292                        var->green.length = 8;
1293                        var->blue.offset = 0;
1294                        var->blue.length = 8;
1295                        var->transp.offset = 0;
1296                        var->transp.length = 0;
1297                } else if (var->bits_per_pixel <= 32) {         /* RGBA 888 */
1298                        var->bits_per_pixel = 32;
1299                        var->red.offset = 16;
1300                        var->red.length = 8;
1301                        var->green.offset = 8;
1302                        var->green.length = 8;
1303                        var->blue.offset = 0;
1304                        var->blue.length = 8;
1305                        var->transp.offset = 24;
1306                        var->transp.length = 8;
1307                } else
1308                        return -EINVAL;
1309
1310                var->red.msb_right = 0;
1311                var->green.msb_right = 0;
1312                var->blue.msb_right = 0;
1313                var->transp.msb_right = 0;
1314        }
1315
1316        /* Make sure we don't exceed our allocated memory. */
1317        if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1318            info->fix.smem_len)
1319                return -EINVAL;
1320
1321        return 0;
1322}
1323
1324/* -----------------------------------------------------------------------------
1325 * Frame buffer operations - Overlays
1326 */
1327
1328static ssize_t
1329overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1330{
1331        struct fb_info *info = dev_get_drvdata(dev);
1332        struct sh_mobile_lcdc_overlay *ovl = info->par;
1333
1334        return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1335}
1336
1337static ssize_t
1338overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1339                    const char *buf, size_t count)
1340{
1341        struct fb_info *info = dev_get_drvdata(dev);
1342        struct sh_mobile_lcdc_overlay *ovl = info->par;
1343        unsigned int alpha;
1344        char *endp;
1345
1346        alpha = simple_strtoul(buf, &endp, 10);
1347        if (isspace(*endp))
1348                endp++;
1349
1350        if (endp - buf != count)
1351                return -EINVAL;
1352
1353        if (alpha > 255)
1354                return -EINVAL;
1355
1356        if (ovl->alpha != alpha) {
1357                ovl->alpha = alpha;
1358
1359                if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1360                        sh_mobile_lcdc_overlay_setup(ovl);
1361        }
1362
1363        return count;
1364}
1365
1366static ssize_t
1367overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1368{
1369        struct fb_info *info = dev_get_drvdata(dev);
1370        struct sh_mobile_lcdc_overlay *ovl = info->par;
1371
1372        return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1373}
1374
1375static ssize_t
1376overlay_mode_store(struct device *dev, struct device_attribute *attr,
1377                   const char *buf, size_t count)
1378{
1379        struct fb_info *info = dev_get_drvdata(dev);
1380        struct sh_mobile_lcdc_overlay *ovl = info->par;
1381        unsigned int mode;
1382        char *endp;
1383
1384        mode = simple_strtoul(buf, &endp, 10);
1385        if (isspace(*endp))
1386                endp++;
1387
1388        if (endp - buf != count)
1389                return -EINVAL;
1390
1391        if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1392                return -EINVAL;
1393
1394        if (ovl->mode != mode) {
1395                ovl->mode = mode;
1396
1397                if (ovl->enabled)
1398                        sh_mobile_lcdc_overlay_setup(ovl);
1399        }
1400
1401        return count;
1402}
1403
1404static ssize_t
1405overlay_position_show(struct device *dev, struct device_attribute *attr,
1406                      char *buf)
1407{
1408        struct fb_info *info = dev_get_drvdata(dev);
1409        struct sh_mobile_lcdc_overlay *ovl = info->par;
1410
1411        return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1412}
1413
1414static ssize_t
1415overlay_position_store(struct device *dev, struct device_attribute *attr,
1416                       const char *buf, size_t count)
1417{
1418        struct fb_info *info = dev_get_drvdata(dev);
1419        struct sh_mobile_lcdc_overlay *ovl = info->par;
1420        char *endp;
1421        int pos_x;
1422        int pos_y;
1423
1424        pos_x = simple_strtol(buf, &endp, 10);
1425        if (*endp != ',')
1426                return -EINVAL;
1427
1428        pos_y = simple_strtol(endp + 1, &endp, 10);
1429        if (isspace(*endp))
1430                endp++;
1431
1432        if (endp - buf != count)
1433                return -EINVAL;
1434
1435        if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1436                ovl->pos_x = pos_x;
1437                ovl->pos_y = pos_y;
1438
1439                if (ovl->enabled)
1440                        sh_mobile_lcdc_overlay_setup(ovl);
1441        }
1442
1443        return count;
1444}
1445
1446static ssize_t
1447overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1448{
1449        struct fb_info *info = dev_get_drvdata(dev);
1450        struct sh_mobile_lcdc_overlay *ovl = info->par;
1451
1452        return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1453}
1454
1455static ssize_t
1456overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1457                    const char *buf, size_t count)
1458{
1459        struct fb_info *info = dev_get_drvdata(dev);
1460        struct sh_mobile_lcdc_overlay *ovl = info->par;
1461        unsigned int rop3;
1462        char *endp;
1463
1464        rop3 = !!simple_strtoul(buf, &endp, 10);
1465        if (isspace(*endp))
1466                endp++;
1467
1468        if (endp - buf != count)
1469                return -EINVAL;
1470
1471        if (rop3 > 255)
1472                return -EINVAL;
1473
1474        if (ovl->rop3 != rop3) {
1475                ovl->rop3 = rop3;
1476
1477                if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1478                        sh_mobile_lcdc_overlay_setup(ovl);
1479        }
1480
1481        return count;
1482}
1483
1484static const struct device_attribute overlay_sysfs_attrs[] = {
1485        __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1486               overlay_alpha_show, overlay_alpha_store),
1487        __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1488               overlay_mode_show, overlay_mode_store),
1489        __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1490               overlay_position_show, overlay_position_store),
1491        __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1492               overlay_rop3_show, overlay_rop3_store),
1493};
1494
1495static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1496        .id =           "SH Mobile LCDC",
1497        .type =         FB_TYPE_PACKED_PIXELS,
1498        .visual =       FB_VISUAL_TRUECOLOR,
1499        .accel =        FB_ACCEL_NONE,
1500        .xpanstep =     1,
1501        .ypanstep =     1,
1502        .ywrapstep =    0,
1503        .capabilities = FB_CAP_FOURCC,
1504};
1505
1506static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1507                                    struct fb_info *info)
1508{
1509        struct sh_mobile_lcdc_overlay *ovl = info->par;
1510        unsigned long base_addr_y;
1511        unsigned long base_addr_c;
1512        unsigned long y_offset;
1513        unsigned long c_offset;
1514
1515        if (!ovl->format->yuv) {
1516                y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1517                         * ovl->format->bpp / 8;
1518                c_offset = 0;
1519        } else {
1520                unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1521                unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1522
1523                y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1524                c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1525                         + var->xoffset * 2 / xsub;
1526        }
1527
1528        /* If the Y offset hasn't changed, the C offset hasn't either. There's
1529         * nothing to do in that case.
1530         */
1531        if (y_offset == ovl->pan_y_offset)
1532                return 0;
1533
1534        /* Set the source address for the next refresh */
1535        base_addr_y = ovl->dma_handle + y_offset;
1536        base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1537                    + c_offset;
1538
1539        ovl->base_addr_y = base_addr_y;
1540        ovl->base_addr_c = base_addr_c;
1541        ovl->pan_y_offset = y_offset;
1542
1543        lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1544
1545        lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1546        lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1547
1548        lcdc_write(ovl->channel->lcdc, LDBCR,
1549                   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1550
1551        return 0;
1552}
1553
1554static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1555                                      unsigned long arg)
1556{
1557        struct sh_mobile_lcdc_overlay *ovl = info->par;
1558
1559        switch (cmd) {
1560        case FBIO_WAITFORVSYNC:
1561                return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1562
1563        default:
1564                return -ENOIOCTLCMD;
1565        }
1566}
1567
1568static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1569                                          struct fb_info *info)
1570{
1571        return __sh_mobile_lcdc_check_var(var, info);
1572}
1573
1574static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1575{
1576        struct sh_mobile_lcdc_overlay *ovl = info->par;
1577
1578        ovl->format =
1579                sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1580
1581        ovl->xres = info->var.xres;
1582        ovl->xres_virtual = info->var.xres_virtual;
1583        ovl->yres = info->var.yres;
1584        ovl->yres_virtual = info->var.yres_virtual;
1585
1586        if (ovl->format->yuv)
1587                ovl->pitch = info->var.xres_virtual;
1588        else
1589                ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1590
1591        sh_mobile_lcdc_overlay_setup(ovl);
1592
1593        info->fix.line_length = ovl->pitch;
1594
1595        if (sh_mobile_format_is_fourcc(&info->var)) {
1596                info->fix.type = FB_TYPE_FOURCC;
1597                info->fix.visual = FB_VISUAL_FOURCC;
1598        } else {
1599                info->fix.type = FB_TYPE_PACKED_PIXELS;
1600                info->fix.visual = FB_VISUAL_TRUECOLOR;
1601        }
1602
1603        return 0;
1604}
1605
1606/* Overlay blanking. Disable the overlay when blanked. */
1607static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1608{
1609        struct sh_mobile_lcdc_overlay *ovl = info->par;
1610
1611        ovl->enabled = !blank;
1612        sh_mobile_lcdc_overlay_setup(ovl);
1613
1614        /* Prevent the backlight from receiving a blanking event by returning
1615         * a non-zero value.
1616         */
1617        return 1;
1618}
1619
1620static int
1621sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1622{
1623        struct sh_mobile_lcdc_overlay *ovl = info->par;
1624
1625        return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1626                                 ovl->dma_handle, ovl->fb_size);
1627}
1628
1629static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1630        .owner          = THIS_MODULE,
1631        .fb_read        = fb_sys_read,
1632        .fb_write       = fb_sys_write,
1633        .fb_fillrect    = sys_fillrect,
1634        .fb_copyarea    = sys_copyarea,
1635        .fb_imageblit   = sys_imageblit,
1636        .fb_blank       = sh_mobile_lcdc_overlay_blank,
1637        .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1638        .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1639        .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1640        .fb_set_par     = sh_mobile_lcdc_overlay_set_par,
1641        .fb_mmap        = sh_mobile_lcdc_overlay_mmap,
1642};
1643
1644static void
1645sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1646{
1647        struct fb_info *info = ovl->info;
1648
1649        if (info == NULL || info->dev == NULL)
1650                return;
1651
1652        unregister_framebuffer(ovl->info);
1653}
1654
1655static int
1656sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1657{
1658        struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1659        struct fb_info *info = ovl->info;
1660        unsigned int i;
1661        int ret;
1662
1663        if (info == NULL)
1664                return 0;
1665
1666        ret = register_framebuffer(info);
1667        if (ret < 0)
1668                return ret;
1669
1670        dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1671                 dev_name(lcdc->dev), ovl->index, info->var.xres,
1672                 info->var.yres, info->var.bits_per_pixel);
1673
1674        for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1675                ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1676                if (ret < 0)
1677                        return ret;
1678        }
1679
1680        return 0;
1681}
1682
1683static void
1684sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1685{
1686        struct fb_info *info = ovl->info;
1687
1688        if (info == NULL || info->device == NULL)
1689                return;
1690
1691        framebuffer_release(info);
1692}
1693
1694static int
1695sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1696{
1697        struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1698        struct fb_var_screeninfo *var;
1699        struct fb_info *info;
1700
1701        /* Allocate and initialize the frame buffer device. */
1702        info = framebuffer_alloc(0, priv->dev);
1703        if (info == NULL) {
1704                dev_err(priv->dev, "unable to allocate fb_info\n");
1705                return -ENOMEM;
1706        }
1707
1708        ovl->info = info;
1709
1710        info->flags = FBINFO_FLAG_DEFAULT;
1711        info->fbops = &sh_mobile_lcdc_overlay_ops;
1712        info->device = priv->dev;
1713        info->screen_base = ovl->fb_mem;
1714        info->par = ovl;
1715
1716        /* Initialize fixed screen information. Restrict pan to 2 lines steps
1717         * for NV12 and NV21.
1718         */
1719        info->fix = sh_mobile_lcdc_overlay_fix;
1720        snprintf(info->fix.id, sizeof(info->fix.id),
1721                 "SH Mobile LCDC Overlay %u", ovl->index);
1722        info->fix.smem_start = ovl->dma_handle;
1723        info->fix.smem_len = ovl->fb_size;
1724        info->fix.line_length = ovl->pitch;
1725
1726        if (ovl->format->yuv)
1727                info->fix.visual = FB_VISUAL_FOURCC;
1728        else
1729                info->fix.visual = FB_VISUAL_TRUECOLOR;
1730
1731        switch (ovl->format->fourcc) {
1732        case V4L2_PIX_FMT_NV12:
1733        case V4L2_PIX_FMT_NV21:
1734                info->fix.ypanstep = 2;
1735        case V4L2_PIX_FMT_NV16:
1736        case V4L2_PIX_FMT_NV61:
1737                info->fix.xpanstep = 2;
1738        }
1739
1740        /* Initialize variable screen information. */
1741        var = &info->var;
1742        memset(var, 0, sizeof(*var));
1743        var->xres = ovl->xres;
1744        var->yres = ovl->yres;
1745        var->xres_virtual = ovl->xres_virtual;
1746        var->yres_virtual = ovl->yres_virtual;
1747        var->activate = FB_ACTIVATE_NOW;
1748
1749        /* Use the legacy API by default for RGB formats, and the FOURCC API
1750         * for YUV formats.
1751         */
1752        if (!ovl->format->yuv)
1753                var->bits_per_pixel = ovl->format->bpp;
1754        else
1755                var->grayscale = ovl->format->fourcc;
1756
1757        return sh_mobile_lcdc_overlay_check_var(var, info);
1758}
1759
1760/* -----------------------------------------------------------------------------
1761 * Frame buffer operations - main frame buffer
1762 */
1763
1764static int sh_mobile_lcdc_setcolreg(u_int regno,
1765                                    u_int red, u_int green, u_int blue,
1766                                    u_int transp, struct fb_info *info)
1767{
1768        u32 *palette = info->pseudo_palette;
1769
1770        if (regno >= PALETTE_NR)
1771                return -EINVAL;
1772
1773        /* only FB_VISUAL_TRUECOLOR supported */
1774
1775        red >>= 16 - info->var.red.length;
1776        green >>= 16 - info->var.green.length;
1777        blue >>= 16 - info->var.blue.length;
1778        transp >>= 16 - info->var.transp.length;
1779
1780        palette[regno] = (red << info->var.red.offset) |
1781          (green << info->var.green.offset) |
1782          (blue << info->var.blue.offset) |
1783          (transp << info->var.transp.offset);
1784
1785        return 0;
1786}
1787
1788static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1789        .id =           "SH Mobile LCDC",
1790        .type =         FB_TYPE_PACKED_PIXELS,
1791        .visual =       FB_VISUAL_TRUECOLOR,
1792        .accel =        FB_ACCEL_NONE,
1793        .xpanstep =     1,
1794        .ypanstep =     1,
1795        .ywrapstep =    0,
1796        .capabilities = FB_CAP_FOURCC,
1797};
1798
1799static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1800                                    const struct fb_fillrect *rect)
1801{
1802        sys_fillrect(info, rect);
1803        sh_mobile_lcdc_deferred_io_touch(info);
1804}
1805
1806static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1807                                    const struct fb_copyarea *area)
1808{
1809        sys_copyarea(info, area);
1810        sh_mobile_lcdc_deferred_io_touch(info);
1811}
1812
1813static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1814                                     const struct fb_image *image)
1815{
1816        sys_imageblit(info, image);
1817        sh_mobile_lcdc_deferred_io_touch(info);
1818}
1819
1820static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1821                              struct fb_info *info)
1822{
1823        struct sh_mobile_lcdc_chan *ch = info->par;
1824        struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1825        unsigned long ldrcntr;
1826        unsigned long base_addr_y, base_addr_c;
1827        unsigned long y_offset;
1828        unsigned long c_offset;
1829
1830        if (!ch->format->yuv) {
1831                y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1832                         * ch->format->bpp / 8;
1833                c_offset = 0;
1834        } else {
1835                unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1836                unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1837
1838                y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1839                c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1840                         + var->xoffset * 2 / xsub;
1841        }
1842
1843        /* If the Y offset hasn't changed, the C offset hasn't either. There's
1844         * nothing to do in that case.
1845         */
1846        if (y_offset == ch->pan_y_offset)
1847                return 0;
1848
1849        /* Set the source address for the next refresh */
1850        base_addr_y = ch->dma_handle + y_offset;
1851        base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1852                    + c_offset;
1853
1854        if (ch->cache)
1855                sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1856                                             base_addr_y, base_addr_c,
1857                                             &base_addr_y, &base_addr_c);
1858
1859        ch->base_addr_y = base_addr_y;
1860        ch->base_addr_c = base_addr_c;
1861        ch->pan_y_offset = y_offset;
1862
1863        lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1864        if (ch->format->yuv)
1865                lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1866
1867        ldrcntr = lcdc_read(priv, _LDRCNTR);
1868        if (lcdc_chan_is_sublcd(ch))
1869                lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1870        else
1871                lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1872
1873
1874        sh_mobile_lcdc_deferred_io_touch(info);
1875
1876        return 0;
1877}
1878
1879static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1880                                unsigned long arg)
1881{
1882        struct sh_mobile_lcdc_chan *ch = info->par;
1883        int retval;
1884
1885        switch (cmd) {
1886        case FBIO_WAITFORVSYNC:
1887                retval = sh_mobile_lcdc_wait_for_vsync(ch);
1888                break;
1889
1890        default:
1891                retval = -ENOIOCTLCMD;
1892                break;
1893        }
1894        return retval;
1895}
1896
1897static void sh_mobile_fb_reconfig(struct fb_info *info)
1898{
1899        struct sh_mobile_lcdc_chan *ch = info->par;
1900        struct fb_var_screeninfo var;
1901        struct fb_videomode mode;
1902        struct fb_event event;
1903        int evnt = FB_EVENT_MODE_CHANGE_ALL;
1904
1905        if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1906                /* More framebuffer users are active */
1907                return;
1908
1909        fb_var_to_videomode(&mode, &info->var);
1910
1911        if (fb_mode_is_equal(&ch->display.mode, &mode))
1912                return;
1913
1914        /* Display has been re-plugged, framebuffer is free now, reconfigure */
1915        var = info->var;
1916        fb_videomode_to_var(&var, &ch->display.mode);
1917        var.width = ch->display.width;
1918        var.height = ch->display.height;
1919        var.activate = FB_ACTIVATE_NOW;
1920
1921        if (fb_set_var(info, &var) < 0)
1922                /* Couldn't reconfigure, hopefully, can continue as before */
1923                return;
1924
1925        /*
1926         * fb_set_var() calls the notifier change internally, only if
1927         * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1928         * user event, we have to call the chain ourselves.
1929         */
1930        event.info = info;
1931        event.data = &ch->display.mode;
1932        fb_notifier_call_chain(evnt, &event);
1933}
1934
1935/*
1936 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1937 * user == 1, or with console sem held, if user == 0.
1938 */
1939static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1940{
1941        struct sh_mobile_lcdc_chan *ch = info->par;
1942
1943        mutex_lock(&ch->open_lock);
1944        dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1945
1946        ch->use_count--;
1947
1948        /* Nothing to reconfigure, when called from fbcon */
1949        if (user) {
1950                console_lock();
1951                sh_mobile_fb_reconfig(info);
1952                console_unlock();
1953        }
1954
1955        mutex_unlock(&ch->open_lock);
1956
1957        return 0;
1958}
1959
1960static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1961{
1962        struct sh_mobile_lcdc_chan *ch = info->par;
1963
1964        mutex_lock(&ch->open_lock);
1965        ch->use_count++;
1966
1967        dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1968        mutex_unlock(&ch->open_lock);
1969
1970        return 0;
1971}
1972
1973static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1974                                    struct fb_info *info)
1975{
1976        struct sh_mobile_lcdc_chan *ch = info->par;
1977        struct sh_mobile_lcdc_priv *p = ch->lcdc;
1978        unsigned int best_dist = (unsigned int)-1;
1979        unsigned int best_xres = 0;
1980        unsigned int best_yres = 0;
1981        unsigned int i;
1982        int ret;
1983
1984        /* If board code provides us with a list of available modes, make sure
1985         * we use one of them. Find the mode closest to the requested one. The
1986         * distance between two modes is defined as the size of the
1987         * non-overlapping parts of the two rectangles.
1988         */
1989        for (i = 0; i < ch->cfg->num_modes; ++i) {
1990                const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1991                unsigned int dist;
1992
1993                /* We can only round up. */
1994                if (var->xres > mode->xres || var->yres > mode->yres)
1995                        continue;
1996
1997                dist = var->xres * var->yres + mode->xres * mode->yres
1998                     - 2 * min(var->xres, mode->xres)
1999                         * min(var->yres, mode->yres);
2000
2001                if (dist < best_dist) {
2002                        best_xres = mode->xres;
2003                        best_yres = mode->yres;
2004                        best_dist = dist;
2005                }
2006        }
2007
2008        /* If no available mode can be used, return an error. */
2009        if (ch->cfg->num_modes != 0) {
2010                if (best_dist == (unsigned int)-1)
2011                        return -EINVAL;
2012
2013                var->xres = best_xres;
2014                var->yres = best_yres;
2015        }
2016
2017        ret = __sh_mobile_lcdc_check_var(var, info);
2018        if (ret < 0)
2019                return ret;
2020
2021        /* only accept the forced_fourcc for dual channel configurations */
2022        if (p->forced_fourcc &&
2023            p->forced_fourcc != sh_mobile_format_fourcc(var))
2024                return -EINVAL;
2025
2026        return 0;
2027}
2028
2029static int sh_mobile_lcdc_set_par(struct fb_info *info)
2030{
2031        struct sh_mobile_lcdc_chan *ch = info->par;
2032        int ret;
2033
2034        sh_mobile_lcdc_stop(ch->lcdc);
2035
2036        ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2037        ch->colorspace = info->var.colorspace;
2038
2039        ch->xres = info->var.xres;
2040        ch->xres_virtual = info->var.xres_virtual;
2041        ch->yres = info->var.yres;
2042        ch->yres_virtual = info->var.yres_virtual;
2043
2044        if (ch->format->yuv)
2045                ch->pitch = info->var.xres_virtual;
2046        else
2047                ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2048
2049        ret = sh_mobile_lcdc_start(ch->lcdc);
2050        if (ret < 0)
2051                dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2052
2053        info->fix.line_length = ch->pitch;
2054
2055        if (sh_mobile_format_is_fourcc(&info->var)) {
2056                info->fix.type = FB_TYPE_FOURCC;
2057                info->fix.visual = FB_VISUAL_FOURCC;
2058        } else {
2059                info->fix.type = FB_TYPE_PACKED_PIXELS;
2060                info->fix.visual = FB_VISUAL_TRUECOLOR;
2061        }
2062
2063        return ret;
2064}
2065
2066/*
2067 * Screen blanking. Behavior is as follows:
2068 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2069 * FB_BLANK_NORMAL: screen blanked, clocks enabled
2070 * FB_BLANK_VSYNC,
2071 * FB_BLANK_HSYNC,
2072 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2073 */
2074static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2075{
2076        struct sh_mobile_lcdc_chan *ch = info->par;
2077        struct sh_mobile_lcdc_priv *p = ch->lcdc;
2078
2079        /* blank the screen? */
2080        if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2081                struct fb_fillrect rect = {
2082                        .width = ch->xres,
2083                        .height = ch->yres,
2084                };
2085                sh_mobile_lcdc_fillrect(info, &rect);
2086        }
2087        /* turn clocks on? */
2088        if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2089                sh_mobile_lcdc_clk_on(p);
2090        }
2091        /* turn clocks off? */
2092        if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2093                /* make sure the screen is updated with the black fill before
2094                 * switching the clocks off. one vsync is not enough since
2095                 * blanking may occur in the middle of a refresh. deferred io
2096                 * mode will reenable the clocks and update the screen in time,
2097                 * so it does not need this. */
2098                if (!info->fbdefio) {
2099                        sh_mobile_lcdc_wait_for_vsync(ch);
2100                        sh_mobile_lcdc_wait_for_vsync(ch);
2101                }
2102                sh_mobile_lcdc_clk_off(p);
2103        }
2104
2105        ch->blank_status = blank;
2106        return 0;
2107}
2108
2109static int
2110sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
2111{
2112        struct sh_mobile_lcdc_chan *ch = info->par;
2113
2114        return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
2115                                 ch->dma_handle, ch->fb_size);
2116}
2117
2118static struct fb_ops sh_mobile_lcdc_ops = {
2119        .owner          = THIS_MODULE,
2120        .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
2121        .fb_read        = fb_sys_read,
2122        .fb_write       = fb_sys_write,
2123        .fb_fillrect    = sh_mobile_lcdc_fillrect,
2124        .fb_copyarea    = sh_mobile_lcdc_copyarea,
2125        .fb_imageblit   = sh_mobile_lcdc_imageblit,
2126        .fb_blank       = sh_mobile_lcdc_blank,
2127        .fb_pan_display = sh_mobile_lcdc_pan,
2128        .fb_ioctl       = sh_mobile_lcdc_ioctl,
2129        .fb_open        = sh_mobile_lcdc_open,
2130        .fb_release     = sh_mobile_lcdc_release,
2131        .fb_check_var   = sh_mobile_lcdc_check_var,
2132        .fb_set_par     = sh_mobile_lcdc_set_par,
2133        .fb_mmap        = sh_mobile_lcdc_mmap,
2134};
2135
2136static void
2137sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2138{
2139        if (ch->info && ch->info->dev)
2140                unregister_framebuffer(ch->info);
2141}
2142
2143static int
2144sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2145{
2146        struct fb_info *info = ch->info;
2147        int ret;
2148
2149        if (info->fbdefio) {
2150                ch->sglist = vmalloc(sizeof(struct scatterlist) *
2151                                     ch->fb_size >> PAGE_SHIFT);
2152                if (!ch->sglist) {
2153                        dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2154                        return -ENOMEM;
2155                }
2156        }
2157
2158        info->bl_dev = ch->bl;
2159
2160        ret = register_framebuffer(info);
2161        if (ret < 0)
2162                return ret;
2163
2164        dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2165                 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2166                 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2167                 info->var.bits_per_pixel);
2168
2169        /* deferred io mode: disable clock to save power */
2170        if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2171                sh_mobile_lcdc_clk_off(ch->lcdc);
2172
2173        return ret;
2174}
2175
2176static void
2177sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2178{
2179        struct fb_info *info = ch->info;
2180
2181        if (!info || !info->device)
2182                return;
2183
2184        if (ch->sglist)
2185                vfree(ch->sglist);
2186
2187        fb_dealloc_cmap(&info->cmap);
2188        framebuffer_release(info);
2189}
2190
2191static int
2192sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2193                               const struct fb_videomode *modes,
2194                               unsigned int num_modes)
2195{
2196        struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2197        struct fb_var_screeninfo *var;
2198        struct fb_info *info;
2199        int ret;
2200
2201        /* Allocate and initialize the frame buffer device. Create the modes
2202         * list and allocate the color map.
2203         */
2204        info = framebuffer_alloc(0, priv->dev);
2205        if (info == NULL) {
2206                dev_err(priv->dev, "unable to allocate fb_info\n");
2207                return -ENOMEM;
2208        }
2209
2210        ch->info = info;
2211
2212        info->flags = FBINFO_FLAG_DEFAULT;
2213        info->fbops = &sh_mobile_lcdc_ops;
2214        info->device = priv->dev;
2215        info->screen_base = ch->fb_mem;
2216        info->pseudo_palette = &ch->pseudo_palette;
2217        info->par = ch;
2218
2219        fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2220
2221        ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2222        if (ret < 0) {
2223                dev_err(priv->dev, "unable to allocate cmap\n");
2224                return ret;
2225        }
2226
2227        /* Initialize fixed screen information. Restrict pan to 2 lines steps
2228         * for NV12 and NV21.
2229         */
2230        info->fix = sh_mobile_lcdc_fix;
2231        info->fix.smem_start = ch->dma_handle;
2232        info->fix.smem_len = ch->fb_size;
2233        info->fix.line_length = ch->pitch;
2234
2235        if (ch->format->yuv)
2236                info->fix.visual = FB_VISUAL_FOURCC;
2237        else
2238                info->fix.visual = FB_VISUAL_TRUECOLOR;
2239
2240        switch (ch->format->fourcc) {
2241        case V4L2_PIX_FMT_NV12:
2242        case V4L2_PIX_FMT_NV21:
2243                info->fix.ypanstep = 2;
2244        case V4L2_PIX_FMT_NV16:
2245        case V4L2_PIX_FMT_NV61:
2246                info->fix.xpanstep = 2;
2247        }
2248
2249        /* Initialize variable screen information using the first mode as
2250         * default.
2251         */
2252        var = &info->var;
2253        fb_videomode_to_var(var, modes);
2254        var->width = ch->display.width;
2255        var->height = ch->display.height;
2256        var->xres_virtual = ch->xres_virtual;
2257        var->yres_virtual = ch->yres_virtual;
2258        var->activate = FB_ACTIVATE_NOW;
2259
2260        /* Use the legacy API by default for RGB formats, and the FOURCC API
2261         * for YUV formats.
2262         */
2263        if (!ch->format->yuv)
2264                var->bits_per_pixel = ch->format->bpp;
2265        else
2266                var->grayscale = ch->format->fourcc;
2267
2268        ret = sh_mobile_lcdc_check_var(var, info);
2269        if (ret)
2270                return ret;
2271
2272        return 0;
2273}
2274
2275/* -----------------------------------------------------------------------------
2276 * Backlight
2277 */
2278
2279static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2280{
2281        struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2282        int brightness = bdev->props.brightness;
2283
2284        if (bdev->props.power != FB_BLANK_UNBLANK ||
2285            bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2286                brightness = 0;
2287
2288        ch->bl_brightness = brightness;
2289        return ch->cfg->bl_info.set_brightness(brightness);
2290}
2291
2292static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2293{
2294        struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2295
2296        return ch->bl_brightness;
2297}
2298
2299static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2300                                   struct fb_info *info)
2301{
2302        return (info->bl_dev == bdev);
2303}
2304
2305static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2306        .options        = BL_CORE_SUSPENDRESUME,
2307        .update_status  = sh_mobile_lcdc_update_bl,
2308        .get_brightness = sh_mobile_lcdc_get_brightness,
2309        .check_fb       = sh_mobile_lcdc_check_fb,
2310};
2311
2312static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2313                                               struct sh_mobile_lcdc_chan *ch)
2314{
2315        struct backlight_device *bl;
2316
2317        bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2318                                       &sh_mobile_lcdc_bl_ops, NULL);
2319        if (IS_ERR(bl)) {
2320                dev_err(parent, "unable to register backlight device: %ld\n",
2321                        PTR_ERR(bl));
2322                return NULL;
2323        }
2324
2325        bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2326        bl->props.brightness = bl->props.max_brightness;
2327        backlight_update_status(bl);
2328
2329        return bl;
2330}
2331
2332static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2333{
2334        backlight_device_unregister(bdev);
2335}
2336
2337/* -----------------------------------------------------------------------------
2338 * Power management
2339 */
2340
2341static int sh_mobile_lcdc_suspend(struct device *dev)
2342{
2343        struct platform_device *pdev = to_platform_device(dev);
2344
2345        sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2346        return 0;
2347}
2348
2349static int sh_mobile_lcdc_resume(struct device *dev)
2350{
2351        struct platform_device *pdev = to_platform_device(dev);
2352
2353        return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2354}
2355
2356static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2357{
2358        struct platform_device *pdev = to_platform_device(dev);
2359        struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2360
2361        /* turn off LCDC hardware */
2362        lcdc_write(priv, _LDCNT1R, 0);
2363
2364        return 0;
2365}
2366
2367static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2368{
2369        struct platform_device *pdev = to_platform_device(dev);
2370        struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2371
2372        __sh_mobile_lcdc_start(priv);
2373
2374        return 0;
2375}
2376
2377static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2378        .suspend = sh_mobile_lcdc_suspend,
2379        .resume = sh_mobile_lcdc_resume,
2380        .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2381        .runtime_resume = sh_mobile_lcdc_runtime_resume,
2382};
2383
2384/* -----------------------------------------------------------------------------
2385 * Framebuffer notifier
2386 */
2387
2388/* locking: called with info->lock held */
2389static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2390                                 unsigned long action, void *data)
2391{
2392        struct fb_event *event = data;
2393        struct fb_info *info = event->info;
2394        struct sh_mobile_lcdc_chan *ch = info->par;
2395
2396        if (&ch->lcdc->notifier != nb)
2397                return NOTIFY_DONE;
2398
2399        dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2400                __func__, action, event->data);
2401
2402        switch(action) {
2403        case FB_EVENT_SUSPEND:
2404                sh_mobile_lcdc_display_off(ch);
2405                sh_mobile_lcdc_stop(ch->lcdc);
2406                break;
2407        case FB_EVENT_RESUME:
2408                mutex_lock(&ch->open_lock);
2409                sh_mobile_fb_reconfig(info);
2410                mutex_unlock(&ch->open_lock);
2411
2412                sh_mobile_lcdc_display_on(ch);
2413                sh_mobile_lcdc_start(ch->lcdc);
2414        }
2415
2416        return NOTIFY_OK;
2417}
2418
2419/* -----------------------------------------------------------------------------
2420 * Probe/remove and driver init/exit
2421 */
2422
2423static const struct fb_videomode default_720p = {
2424        .name = "HDMI 720p",
2425        .xres = 1280,
2426        .yres = 720,
2427
2428        .left_margin = 220,
2429        .right_margin = 110,
2430        .hsync_len = 40,
2431
2432        .upper_margin = 20,
2433        .lower_margin = 5,
2434        .vsync_len = 5,
2435
2436        .pixclock = 13468,
2437        .refresh = 60,
2438        .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2439};
2440
2441static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2442{
2443        struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2444        unsigned int i;
2445
2446        fb_unregister_client(&priv->notifier);
2447
2448        for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2449                sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2450        for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2451                sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2452
2453        sh_mobile_lcdc_stop(priv);
2454
2455        for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2456                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2457
2458                sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2459
2460                if (ovl->fb_mem)
2461                        dma_free_coherent(&pdev->dev, ovl->fb_size,
2462                                          ovl->fb_mem, ovl->dma_handle);
2463        }
2464
2465        for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2466                struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2467
2468                if (ch->tx_dev) {
2469                        ch->tx_dev->lcdc = NULL;
2470                        module_put(ch->cfg->tx_dev->dev.driver->owner);
2471                }
2472
2473                sh_mobile_lcdc_channel_fb_cleanup(ch);
2474
2475                if (ch->fb_mem)
2476                        dma_free_coherent(&pdev->dev, ch->fb_size,
2477                                          ch->fb_mem, ch->dma_handle);
2478        }
2479
2480        for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2481                struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2482
2483                if (ch->bl)
2484                        sh_mobile_lcdc_bl_remove(ch->bl);
2485                mutex_destroy(&ch->open_lock);
2486        }
2487
2488        if (priv->dot_clk) {
2489                pm_runtime_disable(&pdev->dev);
2490                clk_put(priv->dot_clk);
2491        }
2492
2493        if (priv->base)
2494                iounmap(priv->base);
2495
2496        if (priv->irq)
2497                free_irq(priv->irq, priv);
2498        kfree(priv);
2499        return 0;
2500}
2501
2502static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2503{
2504        int interface_type = ch->cfg->interface_type;
2505
2506        switch (interface_type) {
2507        case RGB8:
2508        case RGB9:
2509        case RGB12A:
2510        case RGB12B:
2511        case RGB16:
2512        case RGB18:
2513        case RGB24:
2514        case SYS8A:
2515        case SYS8B:
2516        case SYS8C:
2517        case SYS8D:
2518        case SYS9:
2519        case SYS12:
2520        case SYS16A:
2521        case SYS16B:
2522        case SYS16C:
2523        case SYS18:
2524        case SYS24:
2525                break;
2526        default:
2527                return -EINVAL;
2528        }
2529
2530        /* SUBLCD only supports SYS interface */
2531        if (lcdc_chan_is_sublcd(ch)) {
2532                if (!(interface_type & LDMT1R_IFM))
2533                        return -EINVAL;
2534
2535                interface_type &= ~LDMT1R_IFM;
2536        }
2537
2538        ch->ldmt1r_value = interface_type;
2539        return 0;
2540}
2541
2542static int
2543sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2544{
2545        const struct sh_mobile_lcdc_format_info *format;
2546        struct device *dev = ovl->channel->lcdc->dev;
2547        int ret;
2548
2549        if (ovl->cfg->fourcc == 0)
2550                return 0;
2551
2552        /* Validate the format. */
2553        format = sh_mobile_format_info(ovl->cfg->fourcc);
2554        if (format == NULL) {
2555                dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2556                return -EINVAL;
2557        }
2558
2559        ovl->enabled = false;
2560        ovl->mode = LCDC_OVERLAY_BLEND;
2561        ovl->alpha = 255;
2562        ovl->rop3 = 0;
2563        ovl->pos_x = 0;
2564        ovl->pos_y = 0;
2565
2566        /* The default Y virtual resolution is twice the panel size to allow for
2567         * double-buffering.
2568         */
2569        ovl->format = format;
2570        ovl->xres = ovl->cfg->max_xres;
2571        ovl->xres_virtual = ovl->xres;
2572        ovl->yres = ovl->cfg->max_yres;
2573        ovl->yres_virtual = ovl->yres * 2;
2574
2575        if (!format->yuv)
2576                ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2577        else
2578                ovl->pitch = ovl->xres_virtual;
2579
2580        /* Allocate frame buffer memory. */
2581        ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2582                       * format->bpp / 8 * 2;
2583        ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2584                                         GFP_KERNEL);
2585        if (!ovl->fb_mem) {
2586                dev_err(dev, "unable to allocate buffer\n");
2587                return -ENOMEM;
2588        }
2589
2590        ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2591        if (ret < 0)
2592                return ret;
2593
2594        return 0;
2595}
2596
2597static int
2598sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2599{
2600        const struct sh_mobile_lcdc_format_info *format;
2601        const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2602        struct device *dev = ch->lcdc->dev;
2603        const struct fb_videomode *max_mode;
2604        const struct fb_videomode *mode;
2605        unsigned int num_modes;
2606        unsigned int max_size;
2607        unsigned int i;
2608
2609        mutex_init(&ch->open_lock);
2610        ch->notify = sh_mobile_lcdc_display_notify;
2611
2612        /* Validate the format. */
2613        format = sh_mobile_format_info(cfg->fourcc);
2614        if (format == NULL) {
2615                dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2616                return -EINVAL;
2617        }
2618
2619        /* Iterate through the modes to validate them and find the highest
2620         * resolution.
2621         */
2622        max_mode = NULL;
2623        max_size = 0;
2624
2625        for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2626                unsigned int size = mode->yres * mode->xres;
2627
2628                /* NV12/NV21 buffers must have even number of lines */
2629                if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2630                     cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2631                        dev_err(dev, "yres must be multiple of 2 for "
2632                                "YCbCr420 mode.\n");
2633                        return -EINVAL;
2634                }
2635
2636                if (size > max_size) {
2637                        max_mode = mode;
2638                        max_size = size;
2639                }
2640        }
2641
2642        if (!max_size)
2643                max_size = MAX_XRES * MAX_YRES;
2644        else
2645                dev_dbg(dev, "Found largest videomode %ux%u\n",
2646                        max_mode->xres, max_mode->yres);
2647
2648        if (cfg->lcd_modes == NULL) {
2649                mode = &default_720p;
2650                num_modes = 1;
2651        } else {
2652                mode = cfg->lcd_modes;
2653                num_modes = cfg->num_modes;
2654        }
2655
2656        /* Use the first mode as default. The default Y virtual resolution is
2657         * twice the panel size to allow for double-buffering.
2658         */
2659        ch->format = format;
2660        ch->xres = mode->xres;
2661        ch->xres_virtual = mode->xres;
2662        ch->yres = mode->yres;
2663        ch->yres_virtual = mode->yres * 2;
2664
2665        if (!format->yuv) {
2666                ch->colorspace = V4L2_COLORSPACE_SRGB;
2667                ch->pitch = ch->xres_virtual * format->bpp / 8;
2668        } else {
2669                ch->colorspace = V4L2_COLORSPACE_REC709;
2670                ch->pitch = ch->xres_virtual;
2671        }
2672
2673        ch->display.width = cfg->panel_cfg.width;
2674        ch->display.height = cfg->panel_cfg.height;
2675        ch->display.mode = *mode;
2676
2677        /* Allocate frame buffer memory. */
2678        ch->fb_size = max_size * format->bpp / 8 * 2;
2679        ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2680                                        GFP_KERNEL);
2681        if (ch->fb_mem == NULL) {
2682                dev_err(dev, "unable to allocate buffer\n");
2683                return -ENOMEM;
2684        }
2685
2686        /* Initialize the transmitter device if present. */
2687        if (cfg->tx_dev) {
2688                if (!cfg->tx_dev->dev.driver ||
2689                    !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2690                        dev_warn(dev, "unable to get transmitter device\n");
2691                        return -EINVAL;
2692                }
2693                ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2694                ch->tx_dev->lcdc = ch;
2695                ch->tx_dev->def_mode = *mode;
2696        }
2697
2698        return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2699}
2700
2701static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2702{
2703        struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2704        struct sh_mobile_lcdc_priv *priv;
2705        struct resource *res;
2706        int num_channels;
2707        int error;
2708        int i;
2709
2710        if (!pdata) {
2711                dev_err(&pdev->dev, "no platform data defined\n");
2712                return -EINVAL;
2713        }
2714
2715        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2716        i = platform_get_irq(pdev, 0);
2717        if (!res || i < 0) {
2718                dev_err(&pdev->dev, "cannot get platform resources\n");
2719                return -ENOENT;
2720        }
2721
2722        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2723        if (!priv) {
2724                dev_err(&pdev->dev, "cannot allocate device data\n");
2725                return -ENOMEM;
2726        }
2727
2728        priv->dev = &pdev->dev;
2729        priv->meram_dev = pdata->meram_dev;
2730        platform_set_drvdata(pdev, priv);
2731
2732        error = request_irq(i, sh_mobile_lcdc_irq, 0,
2733                            dev_name(&pdev->dev), priv);
2734        if (error) {
2735                dev_err(&pdev->dev, "unable to request irq\n");
2736                goto err1;
2737        }
2738
2739        priv->irq = i;
2740        atomic_set(&priv->hw_usecnt, -1);
2741
2742        for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2743                struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2744
2745                ch->lcdc = priv;
2746                ch->cfg = &pdata->ch[i];
2747
2748                error = sh_mobile_lcdc_check_interface(ch);
2749                if (error) {
2750                        dev_err(&pdev->dev, "unsupported interface type\n");
2751                        goto err1;
2752                }
2753                init_waitqueue_head(&ch->frame_end_wait);
2754                init_completion(&ch->vsync_completion);
2755
2756                /* probe the backlight is there is one defined */
2757                if (ch->cfg->bl_info.max_brightness)
2758                        ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2759
2760                switch (pdata->ch[i].chan) {
2761                case LCDC_CHAN_MAINLCD:
2762                        ch->enabled = LDCNT2R_ME;
2763                        ch->reg_offs = lcdc_offs_mainlcd;
2764                        num_channels++;
2765                        break;
2766                case LCDC_CHAN_SUBLCD:
2767                        ch->enabled = LDCNT2R_SE;
2768                        ch->reg_offs = lcdc_offs_sublcd;
2769                        num_channels++;
2770                        break;
2771                }
2772        }
2773
2774        if (!num_channels) {
2775                dev_err(&pdev->dev, "no channels defined\n");
2776                error = -EINVAL;
2777                goto err1;
2778        }
2779
2780        /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2781        if (num_channels == 2)
2782                priv->forced_fourcc = pdata->ch[0].fourcc;
2783
2784        priv->base = ioremap_nocache(res->start, resource_size(res));
2785        if (!priv->base)
2786                goto err1;
2787
2788        error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2789        if (error) {
2790                dev_err(&pdev->dev, "unable to setup clocks\n");
2791                goto err1;
2792        }
2793
2794        /* Enable runtime PM. */
2795        pm_runtime_enable(&pdev->dev);
2796
2797        for (i = 0; i < num_channels; i++) {
2798                struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2799
2800                error = sh_mobile_lcdc_channel_init(ch);
2801                if (error)
2802                        goto err1;
2803        }
2804
2805        for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2806                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2807
2808                ovl->cfg = &pdata->overlays[i];
2809                ovl->channel = &priv->ch[0];
2810
2811                error = sh_mobile_lcdc_overlay_init(ovl);
2812                if (error)
2813                        goto err1;
2814        }
2815
2816        error = sh_mobile_lcdc_start(priv);
2817        if (error) {
2818                dev_err(&pdev->dev, "unable to start hardware\n");
2819                goto err1;
2820        }
2821
2822        for (i = 0; i < num_channels; i++) {
2823                struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2824
2825                error = sh_mobile_lcdc_channel_fb_register(ch);
2826                if (error)
2827                        goto err1;
2828        }
2829
2830        for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2831                struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2832
2833                error = sh_mobile_lcdc_overlay_fb_register(ovl);
2834                if (error)
2835                        goto err1;
2836        }
2837
2838        /* Failure ignored */
2839        priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2840        fb_register_client(&priv->notifier);
2841
2842        return 0;
2843err1:
2844        sh_mobile_lcdc_remove(pdev);
2845
2846        return error;
2847}
2848
2849static struct platform_driver sh_mobile_lcdc_driver = {
2850        .driver         = {
2851                .name           = "sh_mobile_lcdc_fb",
2852                .owner          = THIS_MODULE,
2853                .pm             = &sh_mobile_lcdc_dev_pm_ops,
2854        },
2855        .probe          = sh_mobile_lcdc_probe,
2856        .remove         = sh_mobile_lcdc_remove,
2857};
2858
2859module_platform_driver(sh_mobile_lcdc_driver);
2860
2861MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2862MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2863MODULE_LICENSE("GPL v2");
2864