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