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0001 /*
0002  * SuperH Mobile LCDC Framebuffer
0003  *
0004  * Copyright (c) 2008 Magnus Damm
0005  *
0006  * This file is subject to the terms and conditions of the GNU General Public
0007  * License.  See the file "COPYING" in the main directory of this archive
0008  * for more details.
0009  */
0010 
0011 #include <linux/atomic.h>
0012 #include <linux/backlight.h>
0013 #include <linux/clk.h>
0014 #include <linux/console.h>
0015 #include <linux/ctype.h>
0016 #include <linux/dma-mapping.h>
0017 #include <linux/delay.h>
0018 #include <linux/fbcon.h>
0019 #include <linux/init.h>
0020 #include <linux/interrupt.h>
0021 #include <linux/ioctl.h>
0022 #include <linux/kernel.h>
0023 #include <linux/mm.h>
0024 #include <linux/module.h>
0025 #include <linux/platform_device.h>
0026 #include <linux/pm_runtime.h>
0027 #include <linux/slab.h>
0028 #include <linux/videodev2.h>
0029 #include <linux/vmalloc.h>
0030 
0031 #include <video/sh_mobile_lcdc.h>
0032 
0033 #include "sh_mobile_lcdcfb.h"
0034 
0035 /* ----------------------------------------------------------------------------
0036  * Overlay register definitions
0037  */
0038 
0039 #define LDBCR           0xb00
0040 #define LDBCR_UPC(n)        (1 << ((n) + 16))
0041 #define LDBCR_UPF(n)        (1 << ((n) + 8))
0042 #define LDBCR_UPD(n)        (1 << ((n) + 0))
0043 #define LDBnBSIFR(n)        (0xb20 + (n) * 0x20 + 0x00)
0044 #define LDBBSIFR_EN     (1 << 31)
0045 #define LDBBSIFR_VS     (1 << 29)
0046 #define LDBBSIFR_BRSEL      (1 << 28)
0047 #define LDBBSIFR_MX     (1 << 27)
0048 #define LDBBSIFR_MY     (1 << 26)
0049 #define LDBBSIFR_CV3        (3 << 24)
0050 #define LDBBSIFR_CV2        (2 << 24)
0051 #define LDBBSIFR_CV1        (1 << 24)
0052 #define LDBBSIFR_CV0        (0 << 24)
0053 #define LDBBSIFR_CV_MASK    (3 << 24)
0054 #define LDBBSIFR_LAY_MASK   (0xff << 16)
0055 #define LDBBSIFR_LAY_SHIFT  16
0056 #define LDBBSIFR_ROP3_MASK  (0xff << 16)
0057 #define LDBBSIFR_ROP3_SHIFT 16
0058 #define LDBBSIFR_AL_PL8     (3 << 14)
0059 #define LDBBSIFR_AL_PL1     (2 << 14)
0060 #define LDBBSIFR_AL_PK      (1 << 14)
0061 #define LDBBSIFR_AL_1       (0 << 14)
0062 #define LDBBSIFR_AL_MASK    (3 << 14)
0063 #define LDBBSIFR_SWPL       (1 << 10)
0064 #define LDBBSIFR_SWPW       (1 << 9)
0065 #define LDBBSIFR_SWPB       (1 << 8)
0066 #define LDBBSIFR_RY     (1 << 7)
0067 #define LDBBSIFR_CHRR_420   (2 << 0)
0068 #define LDBBSIFR_CHRR_422   (1 << 0)
0069 #define LDBBSIFR_CHRR_444   (0 << 0)
0070 #define LDBBSIFR_RPKF_ARGB32    (0x00 << 0)
0071 #define LDBBSIFR_RPKF_RGB16 (0x03 << 0)
0072 #define LDBBSIFR_RPKF_RGB24 (0x0b << 0)
0073 #define LDBBSIFR_RPKF_MASK  (0x1f << 0)
0074 #define LDBnBSSZR(n)        (0xb20 + (n) * 0x20 + 0x04)
0075 #define LDBBSSZR_BVSS_MASK  (0xfff << 16)
0076 #define LDBBSSZR_BVSS_SHIFT 16
0077 #define LDBBSSZR_BHSS_MASK  (0xfff << 0)
0078 #define LDBBSSZR_BHSS_SHIFT 0
0079 #define LDBnBLOCR(n)        (0xb20 + (n) * 0x20 + 0x08)
0080 #define LDBBLOCR_CVLC_MASK  (0xfff << 16)
0081 #define LDBBLOCR_CVLC_SHIFT 16
0082 #define LDBBLOCR_CHLC_MASK  (0xfff << 0)
0083 #define LDBBLOCR_CHLC_SHIFT 0
0084 #define LDBnBSMWR(n)        (0xb20 + (n) * 0x20 + 0x0c)
0085 #define LDBBSMWR_BSMWA_MASK (0xffff << 16)
0086 #define LDBBSMWR_BSMWA_SHIFT    16
0087 #define LDBBSMWR_BSMW_MASK  (0xffff << 0)
0088 #define LDBBSMWR_BSMW_SHIFT 0
0089 #define LDBnBSAYR(n)        (0xb20 + (n) * 0x20 + 0x10)
0090 #define LDBBSAYR_FG1A_MASK  (0xff << 24)
0091 #define LDBBSAYR_FG1A_SHIFT 24
0092 #define LDBBSAYR_FG1R_MASK  (0xff << 16)
0093 #define LDBBSAYR_FG1R_SHIFT 16
0094 #define LDBBSAYR_FG1G_MASK  (0xff << 8)
0095 #define LDBBSAYR_FG1G_SHIFT 8
0096 #define LDBBSAYR_FG1B_MASK  (0xff << 0)
0097 #define LDBBSAYR_FG1B_SHIFT 0
0098 #define LDBnBSACR(n)        (0xb20 + (n) * 0x20 + 0x14)
0099 #define LDBBSACR_FG2A_MASK  (0xff << 24)
0100 #define LDBBSACR_FG2A_SHIFT 24
0101 #define LDBBSACR_FG2R_MASK  (0xff << 16)
0102 #define LDBBSACR_FG2R_SHIFT 16
0103 #define LDBBSACR_FG2G_MASK  (0xff << 8)
0104 #define LDBBSACR_FG2G_SHIFT 8
0105 #define LDBBSACR_FG2B_MASK  (0xff << 0)
0106 #define LDBBSACR_FG2B_SHIFT 0
0107 #define LDBnBSAAR(n)        (0xb20 + (n) * 0x20 + 0x18)
0108 #define LDBBSAAR_AP_MASK    (0xff << 24)
0109 #define LDBBSAAR_AP_SHIFT   24
0110 #define LDBBSAAR_R_MASK     (0xff << 16)
0111 #define LDBBSAAR_R_SHIFT    16
0112 #define LDBBSAAR_GY_MASK    (0xff << 8)
0113 #define LDBBSAAR_GY_SHIFT   8
0114 #define LDBBSAAR_B_MASK     (0xff << 0)
0115 #define LDBBSAAR_B_SHIFT    0
0116 #define LDBnBPPCR(n)        (0xb20 + (n) * 0x20 + 0x1c)
0117 #define LDBBPPCR_AP_MASK    (0xff << 24)
0118 #define LDBBPPCR_AP_SHIFT   24
0119 #define LDBBPPCR_R_MASK     (0xff << 16)
0120 #define LDBBPPCR_R_SHIFT    16
0121 #define LDBBPPCR_GY_MASK    (0xff << 8)
0122 #define LDBBPPCR_GY_SHIFT   8
0123 #define LDBBPPCR_B_MASK     (0xff << 0)
0124 #define LDBBPPCR_B_SHIFT    0
0125 #define LDBnBBGCL(n)        (0xb10 + (n) * 0x04)
0126 #define LDBBBGCL_BGA_MASK   (0xff << 24)
0127 #define LDBBBGCL_BGA_SHIFT  24
0128 #define LDBBBGCL_BGR_MASK   (0xff << 16)
0129 #define LDBBBGCL_BGR_SHIFT  16
0130 #define LDBBBGCL_BGG_MASK   (0xff << 8)
0131 #define LDBBBGCL_BGG_SHIFT  8
0132 #define LDBBBGCL_BGB_MASK   (0xff << 0)
0133 #define LDBBBGCL_BGB_SHIFT  0
0134 
0135 #define SIDE_B_OFFSET 0x1000
0136 #define MIRROR_OFFSET 0x2000
0137 
0138 #define MAX_XRES 1920
0139 #define MAX_YRES 1080
0140 
0141 enum sh_mobile_lcdc_overlay_mode {
0142     LCDC_OVERLAY_BLEND,
0143     LCDC_OVERLAY_ROP3,
0144 };
0145 
0146 /*
0147  * struct sh_mobile_lcdc_overlay - LCDC display overlay
0148  *
0149  * @channel: LCDC channel this overlay belongs to
0150  * @cfg: Overlay configuration
0151  * @info: Frame buffer device
0152  * @index: Overlay index (0-3)
0153  * @base: Overlay registers base address
0154  * @enabled: True if the overlay is enabled
0155  * @mode: Overlay blending mode (alpha blend or ROP3)
0156  * @alpha: Global alpha blending value (0-255, for alpha blending mode)
0157  * @rop3: Raster operation (for ROP3 mode)
0158  * @fb_mem: Frame buffer virtual memory address
0159  * @fb_size: Frame buffer size in bytes
0160  * @dma_handle: Frame buffer DMA address
0161  * @base_addr_y: Overlay base address (RGB or luma component)
0162  * @base_addr_c: Overlay base address (chroma component)
0163  * @pan_y_offset: Panning linear offset in bytes (luma component)
0164  * @format: Current pixelf format
0165  * @xres: Horizontal visible resolution
0166  * @xres_virtual: Horizontal total resolution
0167  * @yres: Vertical visible resolution
0168  * @yres_virtual: Vertical total resolution
0169  * @pitch: Overlay line pitch
0170  * @pos_x: Horizontal overlay position
0171  * @pos_y: Vertical overlay position
0172  */
0173 struct sh_mobile_lcdc_overlay {
0174     struct sh_mobile_lcdc_chan *channel;
0175 
0176     const struct sh_mobile_lcdc_overlay_cfg *cfg;
0177     struct fb_info *info;
0178 
0179     unsigned int index;
0180     unsigned long base;
0181 
0182     bool enabled;
0183     enum sh_mobile_lcdc_overlay_mode mode;
0184     unsigned int alpha;
0185     unsigned int rop3;
0186 
0187     void *fb_mem;
0188     unsigned long fb_size;
0189 
0190     dma_addr_t dma_handle;
0191     unsigned long base_addr_y;
0192     unsigned long base_addr_c;
0193     unsigned long pan_y_offset;
0194 
0195     const struct sh_mobile_lcdc_format_info *format;
0196     unsigned int xres;
0197     unsigned int xres_virtual;
0198     unsigned int yres;
0199     unsigned int yres_virtual;
0200     unsigned int pitch;
0201     int pos_x;
0202     int pos_y;
0203 };
0204 
0205 struct sh_mobile_lcdc_priv {
0206     void __iomem *base;
0207     int irq;
0208     atomic_t hw_usecnt;
0209     struct device *dev;
0210     struct clk *dot_clk;
0211     unsigned long lddckr;
0212 
0213     struct sh_mobile_lcdc_chan ch[2];
0214     struct sh_mobile_lcdc_overlay overlays[4];
0215 
0216     int started;
0217     int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
0218 };
0219 
0220 /* -----------------------------------------------------------------------------
0221  * Registers access
0222  */
0223 
0224 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
0225     [LDDCKPAT1R] = 0x400,
0226     [LDDCKPAT2R] = 0x404,
0227     [LDMT1R] = 0x418,
0228     [LDMT2R] = 0x41c,
0229     [LDMT3R] = 0x420,
0230     [LDDFR] = 0x424,
0231     [LDSM1R] = 0x428,
0232     [LDSM2R] = 0x42c,
0233     [LDSA1R] = 0x430,
0234     [LDSA2R] = 0x434,
0235     [LDMLSR] = 0x438,
0236     [LDHCNR] = 0x448,
0237     [LDHSYNR] = 0x44c,
0238     [LDVLNR] = 0x450,
0239     [LDVSYNR] = 0x454,
0240     [LDPMR] = 0x460,
0241     [LDHAJR] = 0x4a0,
0242 };
0243 
0244 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
0245     [LDDCKPAT1R] = 0x408,
0246     [LDDCKPAT2R] = 0x40c,
0247     [LDMT1R] = 0x600,
0248     [LDMT2R] = 0x604,
0249     [LDMT3R] = 0x608,
0250     [LDDFR] = 0x60c,
0251     [LDSM1R] = 0x610,
0252     [LDSM2R] = 0x614,
0253     [LDSA1R] = 0x618,
0254     [LDMLSR] = 0x620,
0255     [LDHCNR] = 0x624,
0256     [LDHSYNR] = 0x628,
0257     [LDVLNR] = 0x62c,
0258     [LDVSYNR] = 0x630,
0259     [LDPMR] = 0x63c,
0260 };
0261 
0262 static bool banked(int reg_nr)
0263 {
0264     switch (reg_nr) {
0265     case LDMT1R:
0266     case LDMT2R:
0267     case LDMT3R:
0268     case LDDFR:
0269     case LDSM1R:
0270     case LDSA1R:
0271     case LDSA2R:
0272     case LDMLSR:
0273     case LDHCNR:
0274     case LDHSYNR:
0275     case LDVLNR:
0276     case LDVSYNR:
0277         return true;
0278     }
0279     return false;
0280 }
0281 
0282 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
0283 {
0284     return chan->cfg->chan == LCDC_CHAN_SUBLCD;
0285 }
0286 
0287 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
0288                 int reg_nr, unsigned long data)
0289 {
0290     iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
0291     if (banked(reg_nr))
0292         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
0293               SIDE_B_OFFSET);
0294 }
0295 
0296 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
0297                 int reg_nr, unsigned long data)
0298 {
0299     iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
0300           MIRROR_OFFSET);
0301 }
0302 
0303 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
0304                     int reg_nr)
0305 {
0306     return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
0307 }
0308 
0309 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
0310                    int reg, unsigned long data)
0311 {
0312     iowrite32(data, ovl->channel->lcdc->base + reg);
0313     iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
0314 }
0315 
0316 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
0317                unsigned long reg_offs, unsigned long data)
0318 {
0319     iowrite32(data, priv->base + reg_offs);
0320 }
0321 
0322 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
0323                    unsigned long reg_offs)
0324 {
0325     return ioread32(priv->base + reg_offs);
0326 }
0327 
0328 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
0329               unsigned long reg_offs,
0330               unsigned long mask, unsigned long until)
0331 {
0332     while ((lcdc_read(priv, reg_offs) & mask) != until)
0333         cpu_relax();
0334 }
0335 
0336 /* -----------------------------------------------------------------------------
0337  * Clock management
0338  */
0339 
0340 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
0341 {
0342     if (atomic_inc_and_test(&priv->hw_usecnt)) {
0343         clk_prepare_enable(priv->dot_clk);
0344         pm_runtime_get_sync(priv->dev);
0345     }
0346 }
0347 
0348 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
0349 {
0350     if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
0351         pm_runtime_put(priv->dev);
0352         clk_disable_unprepare(priv->dot_clk);
0353     }
0354 }
0355 
0356 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
0357                        int clock_source)
0358 {
0359     struct clk *clk;
0360     char *str;
0361 
0362     switch (clock_source) {
0363     case LCDC_CLK_BUS:
0364         str = "bus_clk";
0365         priv->lddckr = LDDCKR_ICKSEL_BUS;
0366         break;
0367     case LCDC_CLK_PERIPHERAL:
0368         str = "peripheral_clk";
0369         priv->lddckr = LDDCKR_ICKSEL_MIPI;
0370         break;
0371     case LCDC_CLK_EXTERNAL:
0372         str = NULL;
0373         priv->lddckr = LDDCKR_ICKSEL_HDMI;
0374         break;
0375     default:
0376         return -EINVAL;
0377     }
0378 
0379     if (str == NULL)
0380         return 0;
0381 
0382     clk = clk_get(priv->dev, str);
0383     if (IS_ERR(clk)) {
0384         dev_err(priv->dev, "cannot get dot clock %s\n", str);
0385         return PTR_ERR(clk);
0386     }
0387 
0388     priv->dot_clk = clk;
0389     return 0;
0390 }
0391 
0392 /* -----------------------------------------------------------------------------
0393  * Display, panel and deferred I/O
0394  */
0395 
0396 static void lcdc_sys_write_index(void *handle, unsigned long data)
0397 {
0398     struct sh_mobile_lcdc_chan *ch = handle;
0399 
0400     lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
0401     lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
0402     lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
0403            (lcdc_chan_is_sublcd(ch) ? 2 : 0));
0404     lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
0405 }
0406 
0407 static void lcdc_sys_write_data(void *handle, unsigned long data)
0408 {
0409     struct sh_mobile_lcdc_chan *ch = handle;
0410 
0411     lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
0412     lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
0413     lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
0414            (lcdc_chan_is_sublcd(ch) ? 2 : 0));
0415     lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
0416 }
0417 
0418 static unsigned long lcdc_sys_read_data(void *handle)
0419 {
0420     struct sh_mobile_lcdc_chan *ch = handle;
0421 
0422     lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
0423     lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
0424     lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
0425            (lcdc_chan_is_sublcd(ch) ? 2 : 0));
0426     udelay(1);
0427     lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
0428 
0429     return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
0430 }
0431 
0432 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
0433     .write_index    = lcdc_sys_write_index,
0434     .write_data = lcdc_sys_write_data,
0435     .read_data  = lcdc_sys_read_data,
0436 };
0437 
0438 static int sh_mobile_lcdc_sginit(struct fb_info *info, struct list_head *pagereflist)
0439 {
0440     struct sh_mobile_lcdc_chan *ch = info->par;
0441     unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
0442     struct fb_deferred_io_pageref *pageref;
0443     int nr_pages = 0;
0444 
0445     sg_init_table(ch->sglist, nr_pages_max);
0446 
0447     list_for_each_entry(pageref, pagereflist, list) {
0448         sg_set_page(&ch->sglist[nr_pages++], pageref->page, PAGE_SIZE, 0);
0449     }
0450 
0451     return nr_pages;
0452 }
0453 
0454 static void sh_mobile_lcdc_deferred_io(struct fb_info *info, struct list_head *pagereflist)
0455 {
0456     struct sh_mobile_lcdc_chan *ch = info->par;
0457     const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
0458 
0459     /* enable clocks before accessing hardware */
0460     sh_mobile_lcdc_clk_on(ch->lcdc);
0461 
0462     /*
0463      * It's possible to get here without anything on the pagereflist via
0464      * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
0465      * invocation. In the former case, the acceleration routines are
0466      * stepped in to when using the framebuffer console causing the
0467      * workqueue to be scheduled without any dirty pages on the list.
0468      *
0469      * Despite this, a panel update is still needed given that the
0470      * acceleration routines have their own methods for writing in
0471      * that still need to be updated.
0472      *
0473      * The fsync() and empty pagereflist case could be optimized for,
0474      * but we don't bother, as any application exhibiting such
0475      * behaviour is fundamentally broken anyways.
0476      */
0477     if (!list_empty(pagereflist)) {
0478         unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagereflist);
0479 
0480         /* trigger panel update */
0481         dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
0482         if (panel->start_transfer)
0483             panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
0484         lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
0485         dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
0486                  DMA_TO_DEVICE);
0487     } else {
0488         if (panel->start_transfer)
0489             panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
0490         lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
0491     }
0492 }
0493 
0494 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
0495 {
0496     struct fb_deferred_io *fbdefio = info->fbdefio;
0497 
0498     if (fbdefio)
0499         schedule_delayed_work(&info->deferred_work, fbdefio->delay);
0500 }
0501 
0502 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
0503 {
0504     const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
0505 
0506     if (ch->tx_dev) {
0507         int ret;
0508 
0509         ret = ch->tx_dev->ops->display_on(ch->tx_dev);
0510         if (ret < 0)
0511             return;
0512 
0513         if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
0514             ch->info->state = FBINFO_STATE_SUSPENDED;
0515     }
0516 
0517     /* HDMI must be enabled before LCDC configuration */
0518     if (panel->display_on)
0519         panel->display_on();
0520 }
0521 
0522 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
0523 {
0524     const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
0525 
0526     if (panel->display_off)
0527         panel->display_off();
0528 
0529     if (ch->tx_dev)
0530         ch->tx_dev->ops->display_off(ch->tx_dev);
0531 }
0532 
0533 /* -----------------------------------------------------------------------------
0534  * Format helpers
0535  */
0536 
0537 struct sh_mobile_lcdc_format_info {
0538     u32 fourcc;
0539     unsigned int bpp;
0540     bool yuv;
0541     u32 lddfr;
0542 };
0543 
0544 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
0545     {
0546         .fourcc = V4L2_PIX_FMT_RGB565,
0547         .bpp = 16,
0548         .yuv = false,
0549         .lddfr = LDDFR_PKF_RGB16,
0550     }, {
0551         .fourcc = V4L2_PIX_FMT_BGR24,
0552         .bpp = 24,
0553         .yuv = false,
0554         .lddfr = LDDFR_PKF_RGB24,
0555     }, {
0556         .fourcc = V4L2_PIX_FMT_BGR32,
0557         .bpp = 32,
0558         .yuv = false,
0559         .lddfr = LDDFR_PKF_ARGB32,
0560     }, {
0561         .fourcc = V4L2_PIX_FMT_NV12,
0562         .bpp = 12,
0563         .yuv = true,
0564         .lddfr = LDDFR_CC | LDDFR_YF_420,
0565     }, {
0566         .fourcc = V4L2_PIX_FMT_NV21,
0567         .bpp = 12,
0568         .yuv = true,
0569         .lddfr = LDDFR_CC | LDDFR_YF_420,
0570     }, {
0571         .fourcc = V4L2_PIX_FMT_NV16,
0572         .bpp = 16,
0573         .yuv = true,
0574         .lddfr = LDDFR_CC | LDDFR_YF_422,
0575     }, {
0576         .fourcc = V4L2_PIX_FMT_NV61,
0577         .bpp = 16,
0578         .yuv = true,
0579         .lddfr = LDDFR_CC | LDDFR_YF_422,
0580     }, {
0581         .fourcc = V4L2_PIX_FMT_NV24,
0582         .bpp = 24,
0583         .yuv = true,
0584         .lddfr = LDDFR_CC | LDDFR_YF_444,
0585     }, {
0586         .fourcc = V4L2_PIX_FMT_NV42,
0587         .bpp = 24,
0588         .yuv = true,
0589         .lddfr = LDDFR_CC | LDDFR_YF_444,
0590     },
0591 };
0592 
0593 static const struct sh_mobile_lcdc_format_info *
0594 sh_mobile_format_info(u32 fourcc)
0595 {
0596     unsigned int i;
0597 
0598     for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
0599         if (sh_mobile_format_infos[i].fourcc == fourcc)
0600             return &sh_mobile_format_infos[i];
0601     }
0602 
0603     return NULL;
0604 }
0605 
0606 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
0607 {
0608     if (var->grayscale > 1)
0609         return var->grayscale;
0610 
0611     switch (var->bits_per_pixel) {
0612     case 16:
0613         return V4L2_PIX_FMT_RGB565;
0614     case 24:
0615         return V4L2_PIX_FMT_BGR24;
0616     case 32:
0617         return V4L2_PIX_FMT_BGR32;
0618     default:
0619         return 0;
0620     }
0621 }
0622 
0623 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
0624 {
0625     return var->grayscale > 1;
0626 }
0627 
0628 /* -----------------------------------------------------------------------------
0629  * Start, stop and IRQ
0630  */
0631 
0632 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
0633 {
0634     struct sh_mobile_lcdc_priv *priv = data;
0635     struct sh_mobile_lcdc_chan *ch;
0636     unsigned long ldintr;
0637     int is_sub;
0638     int k;
0639 
0640     /* Acknowledge interrupts and disable further VSYNC End IRQs. */
0641     ldintr = lcdc_read(priv, _LDINTR);
0642     lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
0643 
0644     /* figure out if this interrupt is for main or sub lcd */
0645     is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
0646 
0647     /* wake up channel and disable clocks */
0648     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
0649         ch = &priv->ch[k];
0650 
0651         if (!ch->enabled)
0652             continue;
0653 
0654         /* Frame End */
0655         if (ldintr & LDINTR_FS) {
0656             if (is_sub == lcdc_chan_is_sublcd(ch)) {
0657                 ch->frame_end = 1;
0658                 wake_up(&ch->frame_end_wait);
0659 
0660                 sh_mobile_lcdc_clk_off(priv);
0661             }
0662         }
0663 
0664         /* VSYNC End */
0665         if (ldintr & LDINTR_VES)
0666             complete(&ch->vsync_completion);
0667     }
0668 
0669     return IRQ_HANDLED;
0670 }
0671 
0672 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
0673 {
0674     unsigned long ldintr;
0675     int ret;
0676 
0677     /* Enable VSync End interrupt and be careful not to acknowledge any
0678      * pending interrupt.
0679      */
0680     ldintr = lcdc_read(ch->lcdc, _LDINTR);
0681     ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
0682     lcdc_write(ch->lcdc, _LDINTR, ldintr);
0683 
0684     ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
0685                             msecs_to_jiffies(100));
0686     if (!ret)
0687         return -ETIMEDOUT;
0688 
0689     return 0;
0690 }
0691 
0692 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
0693                       int start)
0694 {
0695     unsigned long tmp = lcdc_read(priv, _LDCNT2R);
0696     int k;
0697 
0698     /* start or stop the lcdc */
0699     if (start)
0700         lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
0701     else
0702         lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
0703 
0704     /* wait until power is applied/stopped on all channels */
0705     for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
0706         if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
0707             while (1) {
0708                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
0709                     & LDPMR_LPS;
0710                 if (start && tmp == LDPMR_LPS)
0711                     break;
0712                 if (!start && tmp == 0)
0713                     break;
0714                 cpu_relax();
0715             }
0716 
0717     if (!start)
0718         lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
0719 }
0720 
0721 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
0722 {
0723     const struct fb_var_screeninfo *var = &ch->info->var;
0724     const struct fb_videomode *mode = &ch->display.mode;
0725     unsigned long h_total, hsync_pos, display_h_total;
0726     u32 tmp;
0727 
0728     tmp = ch->ldmt1r_value;
0729     tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
0730     tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
0731     tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
0732     tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
0733     tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
0734     tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
0735     tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
0736     lcdc_write_chan(ch, LDMT1R, tmp);
0737 
0738     /* setup SYS bus */
0739     lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
0740     lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
0741 
0742     /* horizontal configuration */
0743     h_total = mode->xres + mode->hsync_len + mode->left_margin
0744         + mode->right_margin;
0745     tmp = h_total / 8; /* HTCN */
0746     tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
0747     lcdc_write_chan(ch, LDHCNR, tmp);
0748 
0749     hsync_pos = mode->xres + mode->right_margin;
0750     tmp = hsync_pos / 8; /* HSYNP */
0751     tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
0752     lcdc_write_chan(ch, LDHSYNR, tmp);
0753 
0754     /* vertical configuration */
0755     tmp = mode->yres + mode->vsync_len + mode->upper_margin
0756         + mode->lower_margin; /* VTLN */
0757     tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
0758     lcdc_write_chan(ch, LDVLNR, tmp);
0759 
0760     tmp = mode->yres + mode->lower_margin; /* VSYNP */
0761     tmp |= mode->vsync_len << 16; /* VSYNW */
0762     lcdc_write_chan(ch, LDVSYNR, tmp);
0763 
0764     /* Adjust horizontal synchronisation for HDMI */
0765     display_h_total = mode->xres + mode->hsync_len + mode->left_margin
0766             + mode->right_margin;
0767     tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
0768         | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
0769     lcdc_write_chan(ch, LDHAJR, tmp);
0770     lcdc_write_chan_mirror(ch, LDHAJR, tmp);
0771 }
0772 
0773 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
0774 {
0775     u32 format = 0;
0776 
0777     if (!ovl->enabled) {
0778         lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
0779         lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
0780         lcdc_write(ovl->channel->lcdc, LDBCR,
0781                LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
0782         return;
0783     }
0784 
0785     ovl->base_addr_y = ovl->dma_handle;
0786     ovl->base_addr_c = ovl->dma_handle
0787              + ovl->xres_virtual * ovl->yres_virtual;
0788 
0789     switch (ovl->mode) {
0790     case LCDC_OVERLAY_BLEND:
0791         format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
0792         break;
0793 
0794     case LCDC_OVERLAY_ROP3:
0795         format = LDBBSIFR_EN | LDBBSIFR_BRSEL
0796                | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
0797         break;
0798     }
0799 
0800     switch (ovl->format->fourcc) {
0801     case V4L2_PIX_FMT_RGB565:
0802     case V4L2_PIX_FMT_NV21:
0803     case V4L2_PIX_FMT_NV61:
0804     case V4L2_PIX_FMT_NV42:
0805         format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
0806         break;
0807     case V4L2_PIX_FMT_BGR24:
0808     case V4L2_PIX_FMT_NV12:
0809     case V4L2_PIX_FMT_NV16:
0810     case V4L2_PIX_FMT_NV24:
0811         format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
0812         break;
0813     case V4L2_PIX_FMT_BGR32:
0814     default:
0815         format |= LDBBSIFR_SWPL;
0816         break;
0817     }
0818 
0819     switch (ovl->format->fourcc) {
0820     case V4L2_PIX_FMT_RGB565:
0821         format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
0822         break;
0823     case V4L2_PIX_FMT_BGR24:
0824         format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
0825         break;
0826     case V4L2_PIX_FMT_BGR32:
0827         format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
0828         break;
0829     case V4L2_PIX_FMT_NV12:
0830     case V4L2_PIX_FMT_NV21:
0831         format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
0832         break;
0833     case V4L2_PIX_FMT_NV16:
0834     case V4L2_PIX_FMT_NV61:
0835         format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
0836         break;
0837     case V4L2_PIX_FMT_NV24:
0838     case V4L2_PIX_FMT_NV42:
0839         format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
0840         break;
0841     }
0842 
0843     lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
0844 
0845     lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
0846 
0847     lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
0848         (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
0849         (ovl->xres << LDBBSSZR_BHSS_SHIFT));
0850     lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
0851         (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
0852         (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
0853     lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
0854         ovl->pitch << LDBBSMWR_BSMW_SHIFT);
0855 
0856     lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
0857     lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
0858 
0859     lcdc_write(ovl->channel->lcdc, LDBCR,
0860            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
0861 }
0862 
0863 /*
0864  * __sh_mobile_lcdc_start - Configure and start the LCDC
0865  * @priv: LCDC device
0866  *
0867  * Configure all enabled channels and start the LCDC device. All external
0868  * devices (clocks, MERAM, panels, ...) are not touched by this function.
0869  */
0870 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
0871 {
0872     struct sh_mobile_lcdc_chan *ch;
0873     unsigned long tmp;
0874     int k, m;
0875 
0876     /* Enable LCDC channels. Read data from external memory, avoid using the
0877      * BEU for now.
0878      */
0879     lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
0880 
0881     /* Stop the LCDC first and disable all interrupts. */
0882     sh_mobile_lcdc_start_stop(priv, 0);
0883     lcdc_write(priv, _LDINTR, 0);
0884 
0885     /* Configure power supply, dot clocks and start them. */
0886     tmp = priv->lddckr;
0887     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
0888         ch = &priv->ch[k];
0889         if (!ch->enabled)
0890             continue;
0891 
0892         /* Power supply */
0893         lcdc_write_chan(ch, LDPMR, 0);
0894 
0895         m = ch->cfg->clock_divider;
0896         if (!m)
0897             continue;
0898 
0899         /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
0900          * denominator.
0901          */
0902         lcdc_write_chan(ch, LDDCKPAT1R, 0);
0903         lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
0904 
0905         if (m == 1)
0906             m = LDDCKR_MOSEL;
0907         tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
0908     }
0909 
0910     lcdc_write(priv, _LDDCKR, tmp);
0911     lcdc_write(priv, _LDDCKSTPR, 0);
0912     lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
0913 
0914     /* Setup geometry, format, frame buffer memory and operation mode. */
0915     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
0916         ch = &priv->ch[k];
0917         if (!ch->enabled)
0918             continue;
0919 
0920         sh_mobile_lcdc_geometry(ch);
0921 
0922         tmp = ch->format->lddfr;
0923 
0924         if (ch->format->yuv) {
0925             switch (ch->colorspace) {
0926             case V4L2_COLORSPACE_REC709:
0927                 tmp |= LDDFR_CF1;
0928                 break;
0929             case V4L2_COLORSPACE_JPEG:
0930                 tmp |= LDDFR_CF0;
0931                 break;
0932             }
0933         }
0934 
0935         lcdc_write_chan(ch, LDDFR, tmp);
0936         lcdc_write_chan(ch, LDMLSR, ch->line_size);
0937         lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
0938         if (ch->format->yuv)
0939             lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
0940 
0941         /* When using deferred I/O mode, configure the LCDC for one-shot
0942          * operation and enable the frame end interrupt. Otherwise use
0943          * continuous read mode.
0944          */
0945         if (ch->ldmt1r_value & LDMT1R_IFM &&
0946             ch->cfg->sys_bus_cfg.deferred_io_msec) {
0947             lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
0948             lcdc_write(priv, _LDINTR, LDINTR_FE);
0949         } else {
0950             lcdc_write_chan(ch, LDSM1R, 0);
0951         }
0952     }
0953 
0954     /* Word and long word swap. */
0955     switch (priv->ch[0].format->fourcc) {
0956     case V4L2_PIX_FMT_RGB565:
0957     case V4L2_PIX_FMT_NV21:
0958     case V4L2_PIX_FMT_NV61:
0959     case V4L2_PIX_FMT_NV42:
0960         tmp = LDDDSR_LS | LDDDSR_WS;
0961         break;
0962     case V4L2_PIX_FMT_BGR24:
0963     case V4L2_PIX_FMT_NV12:
0964     case V4L2_PIX_FMT_NV16:
0965     case V4L2_PIX_FMT_NV24:
0966         tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
0967         break;
0968     case V4L2_PIX_FMT_BGR32:
0969     default:
0970         tmp = LDDDSR_LS;
0971         break;
0972     }
0973     lcdc_write(priv, _LDDDSR, tmp);
0974 
0975     /* Enable the display output. */
0976     lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
0977     sh_mobile_lcdc_start_stop(priv, 1);
0978     priv->started = 1;
0979 }
0980 
0981 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
0982 {
0983     struct sh_mobile_lcdc_chan *ch;
0984     unsigned long tmp;
0985     int ret;
0986     int k;
0987 
0988     /* enable clocks before accessing the hardware */
0989     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
0990         if (priv->ch[k].enabled)
0991             sh_mobile_lcdc_clk_on(priv);
0992     }
0993 
0994     /* reset */
0995     lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
0996     lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
0997 
0998     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
0999         const struct sh_mobile_lcdc_panel_cfg *panel;
1000 
1001         ch = &priv->ch[k];
1002         if (!ch->enabled)
1003             continue;
1004 
1005         panel = &ch->cfg->panel_cfg;
1006         if (panel->setup_sys) {
1007             ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1008             if (ret)
1009                 return ret;
1010         }
1011     }
1012 
1013     /* Compute frame buffer base address and pitch for each channel. */
1014     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1015         ch = &priv->ch[k];
1016         if (!ch->enabled)
1017             continue;
1018 
1019         ch->base_addr_y = ch->dma_handle;
1020         ch->base_addr_c = ch->dma_handle
1021                 + ch->xres_virtual * ch->yres_virtual;
1022         ch->line_size = ch->pitch;
1023     }
1024 
1025     for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1026         struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1027         sh_mobile_lcdc_overlay_setup(ovl);
1028     }
1029 
1030     /* Start the LCDC. */
1031     __sh_mobile_lcdc_start(priv);
1032 
1033     /* Setup deferred I/O, tell the board code to enable the panels, and
1034      * turn backlight on.
1035      */
1036     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1037         ch = &priv->ch[k];
1038         if (!ch->enabled)
1039             continue;
1040 
1041         tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1042         if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1043             ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1044             ch->defio.delay = msecs_to_jiffies(tmp);
1045             ch->info->fbdefio = &ch->defio;
1046             fb_deferred_io_init(ch->info);
1047         }
1048 
1049         sh_mobile_lcdc_display_on(ch);
1050 
1051         if (ch->bl) {
1052             ch->bl->props.power = FB_BLANK_UNBLANK;
1053             backlight_update_status(ch->bl);
1054         }
1055     }
1056 
1057     return 0;
1058 }
1059 
1060 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1061 {
1062     struct sh_mobile_lcdc_chan *ch;
1063     int k;
1064 
1065     /* clean up deferred io and ask board code to disable panel */
1066     for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1067         ch = &priv->ch[k];
1068         if (!ch->enabled)
1069             continue;
1070 
1071         /* deferred io mode:
1072          * flush frame, and wait for frame end interrupt
1073          * clean up deferred io and enable clock
1074          */
1075         if (ch->info && ch->info->fbdefio) {
1076             ch->frame_end = 0;
1077             schedule_delayed_work(&ch->info->deferred_work, 0);
1078             wait_event(ch->frame_end_wait, ch->frame_end);
1079             fb_deferred_io_cleanup(ch->info);
1080             ch->info->fbdefio = NULL;
1081             sh_mobile_lcdc_clk_on(priv);
1082         }
1083 
1084         if (ch->bl) {
1085             ch->bl->props.power = FB_BLANK_POWERDOWN;
1086             backlight_update_status(ch->bl);
1087         }
1088 
1089         sh_mobile_lcdc_display_off(ch);
1090     }
1091 
1092     /* stop the lcdc */
1093     if (priv->started) {
1094         sh_mobile_lcdc_start_stop(priv, 0);
1095         priv->started = 0;
1096     }
1097 
1098     /* stop clocks */
1099     for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1100         if (priv->ch[k].enabled)
1101             sh_mobile_lcdc_clk_off(priv);
1102 }
1103 
1104 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1105                       struct fb_info *info)
1106 {
1107     if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1108         return -EINVAL;
1109 
1110     /* Make sure the virtual resolution is at least as big as the visible
1111      * resolution.
1112      */
1113     if (var->xres_virtual < var->xres)
1114         var->xres_virtual = var->xres;
1115     if (var->yres_virtual < var->yres)
1116         var->yres_virtual = var->yres;
1117 
1118     if (sh_mobile_format_is_fourcc(var)) {
1119         const struct sh_mobile_lcdc_format_info *format;
1120 
1121         format = sh_mobile_format_info(var->grayscale);
1122         if (format == NULL)
1123             return -EINVAL;
1124         var->bits_per_pixel = format->bpp;
1125 
1126         /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1127          * respectively.
1128          */
1129         if (!format->yuv)
1130             var->colorspace = V4L2_COLORSPACE_SRGB;
1131         else if (var->colorspace != V4L2_COLORSPACE_REC709)
1132             var->colorspace = V4L2_COLORSPACE_JPEG;
1133     } else {
1134         if (var->bits_per_pixel <= 16) {        /* RGB 565 */
1135             var->bits_per_pixel = 16;
1136             var->red.offset = 11;
1137             var->red.length = 5;
1138             var->green.offset = 5;
1139             var->green.length = 6;
1140             var->blue.offset = 0;
1141             var->blue.length = 5;
1142             var->transp.offset = 0;
1143             var->transp.length = 0;
1144         } else if (var->bits_per_pixel <= 24) {     /* RGB 888 */
1145             var->bits_per_pixel = 24;
1146             var->red.offset = 16;
1147             var->red.length = 8;
1148             var->green.offset = 8;
1149             var->green.length = 8;
1150             var->blue.offset = 0;
1151             var->blue.length = 8;
1152             var->transp.offset = 0;
1153             var->transp.length = 0;
1154         } else if (var->bits_per_pixel <= 32) {     /* RGBA 888 */
1155             var->bits_per_pixel = 32;
1156             var->red.offset = 16;
1157             var->red.length = 8;
1158             var->green.offset = 8;
1159             var->green.length = 8;
1160             var->blue.offset = 0;
1161             var->blue.length = 8;
1162             var->transp.offset = 24;
1163             var->transp.length = 8;
1164         } else
1165             return -EINVAL;
1166 
1167         var->red.msb_right = 0;
1168         var->green.msb_right = 0;
1169         var->blue.msb_right = 0;
1170         var->transp.msb_right = 0;
1171     }
1172 
1173     /* Make sure we don't exceed our allocated memory. */
1174     if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1175         info->fix.smem_len)
1176         return -EINVAL;
1177 
1178     return 0;
1179 }
1180 
1181 /* -----------------------------------------------------------------------------
1182  * Frame buffer operations - Overlays
1183  */
1184 
1185 static ssize_t
1186 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1187 {
1188     struct fb_info *info = dev_get_drvdata(dev);
1189     struct sh_mobile_lcdc_overlay *ovl = info->par;
1190 
1191     return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1192 }
1193 
1194 static ssize_t
1195 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1196             const char *buf, size_t count)
1197 {
1198     struct fb_info *info = dev_get_drvdata(dev);
1199     struct sh_mobile_lcdc_overlay *ovl = info->par;
1200     unsigned int alpha;
1201     char *endp;
1202 
1203     alpha = simple_strtoul(buf, &endp, 10);
1204     if (isspace(*endp))
1205         endp++;
1206 
1207     if (endp - buf != count)
1208         return -EINVAL;
1209 
1210     if (alpha > 255)
1211         return -EINVAL;
1212 
1213     if (ovl->alpha != alpha) {
1214         ovl->alpha = alpha;
1215 
1216         if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1217             sh_mobile_lcdc_overlay_setup(ovl);
1218     }
1219 
1220     return count;
1221 }
1222 
1223 static ssize_t
1224 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1225 {
1226     struct fb_info *info = dev_get_drvdata(dev);
1227     struct sh_mobile_lcdc_overlay *ovl = info->par;
1228 
1229     return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1230 }
1231 
1232 static ssize_t
1233 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1234            const char *buf, size_t count)
1235 {
1236     struct fb_info *info = dev_get_drvdata(dev);
1237     struct sh_mobile_lcdc_overlay *ovl = info->par;
1238     unsigned int mode;
1239     char *endp;
1240 
1241     mode = simple_strtoul(buf, &endp, 10);
1242     if (isspace(*endp))
1243         endp++;
1244 
1245     if (endp - buf != count)
1246         return -EINVAL;
1247 
1248     if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1249         return -EINVAL;
1250 
1251     if (ovl->mode != mode) {
1252         ovl->mode = mode;
1253 
1254         if (ovl->enabled)
1255             sh_mobile_lcdc_overlay_setup(ovl);
1256     }
1257 
1258     return count;
1259 }
1260 
1261 static ssize_t
1262 overlay_position_show(struct device *dev, struct device_attribute *attr,
1263               char *buf)
1264 {
1265     struct fb_info *info = dev_get_drvdata(dev);
1266     struct sh_mobile_lcdc_overlay *ovl = info->par;
1267 
1268     return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1269 }
1270 
1271 static ssize_t
1272 overlay_position_store(struct device *dev, struct device_attribute *attr,
1273                const char *buf, size_t count)
1274 {
1275     struct fb_info *info = dev_get_drvdata(dev);
1276     struct sh_mobile_lcdc_overlay *ovl = info->par;
1277     char *endp;
1278     int pos_x;
1279     int pos_y;
1280 
1281     pos_x = simple_strtol(buf, &endp, 10);
1282     if (*endp != ',')
1283         return -EINVAL;
1284 
1285     pos_y = simple_strtol(endp + 1, &endp, 10);
1286     if (isspace(*endp))
1287         endp++;
1288 
1289     if (endp - buf != count)
1290         return -EINVAL;
1291 
1292     if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1293         ovl->pos_x = pos_x;
1294         ovl->pos_y = pos_y;
1295 
1296         if (ovl->enabled)
1297             sh_mobile_lcdc_overlay_setup(ovl);
1298     }
1299 
1300     return count;
1301 }
1302 
1303 static ssize_t
1304 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1305 {
1306     struct fb_info *info = dev_get_drvdata(dev);
1307     struct sh_mobile_lcdc_overlay *ovl = info->par;
1308 
1309     return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1310 }
1311 
1312 static ssize_t
1313 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1314             const char *buf, size_t count)
1315 {
1316     struct fb_info *info = dev_get_drvdata(dev);
1317     struct sh_mobile_lcdc_overlay *ovl = info->par;
1318     unsigned int rop3;
1319     char *endp;
1320 
1321     rop3 = simple_strtoul(buf, &endp, 10);
1322     if (isspace(*endp))
1323         endp++;
1324 
1325     if (endp - buf != count)
1326         return -EINVAL;
1327 
1328     if (rop3 > 255)
1329         return -EINVAL;
1330 
1331     if (ovl->rop3 != rop3) {
1332         ovl->rop3 = rop3;
1333 
1334         if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1335             sh_mobile_lcdc_overlay_setup(ovl);
1336     }
1337 
1338     return count;
1339 }
1340 
1341 static const struct device_attribute overlay_sysfs_attrs[] = {
1342     __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1343            overlay_alpha_show, overlay_alpha_store),
1344     __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1345            overlay_mode_show, overlay_mode_store),
1346     __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1347            overlay_position_show, overlay_position_store),
1348     __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1349            overlay_rop3_show, overlay_rop3_store),
1350 };
1351 
1352 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
1353     .id =       "SH Mobile LCDC",
1354     .type =     FB_TYPE_PACKED_PIXELS,
1355     .visual =   FB_VISUAL_TRUECOLOR,
1356     .accel =    FB_ACCEL_NONE,
1357     .xpanstep = 1,
1358     .ypanstep = 1,
1359     .ywrapstep =    0,
1360     .capabilities = FB_CAP_FOURCC,
1361 };
1362 
1363 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1364                     struct fb_info *info)
1365 {
1366     struct sh_mobile_lcdc_overlay *ovl = info->par;
1367     unsigned long base_addr_y;
1368     unsigned long base_addr_c;
1369     unsigned long y_offset;
1370     unsigned long c_offset;
1371 
1372     if (!ovl->format->yuv) {
1373         y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1374              * ovl->format->bpp / 8;
1375         c_offset = 0;
1376     } else {
1377         unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1378         unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1379 
1380         y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1381         c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1382              + var->xoffset * 2 / xsub;
1383     }
1384 
1385     /* If the Y offset hasn't changed, the C offset hasn't either. There's
1386      * nothing to do in that case.
1387      */
1388     if (y_offset == ovl->pan_y_offset)
1389         return 0;
1390 
1391     /* Set the source address for the next refresh */
1392     base_addr_y = ovl->dma_handle + y_offset;
1393     base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1394             + c_offset;
1395 
1396     ovl->base_addr_y = base_addr_y;
1397     ovl->base_addr_c = base_addr_c;
1398     ovl->pan_y_offset = y_offset;
1399 
1400     lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1401 
1402     lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1403     lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1404 
1405     lcdc_write(ovl->channel->lcdc, LDBCR,
1406            LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1407 
1408     return 0;
1409 }
1410 
1411 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1412                       unsigned long arg)
1413 {
1414     struct sh_mobile_lcdc_overlay *ovl = info->par;
1415 
1416     switch (cmd) {
1417     case FBIO_WAITFORVSYNC:
1418         return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1419 
1420     default:
1421         return -ENOIOCTLCMD;
1422     }
1423 }
1424 
1425 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1426                       struct fb_info *info)
1427 {
1428     return __sh_mobile_lcdc_check_var(var, info);
1429 }
1430 
1431 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1432 {
1433     struct sh_mobile_lcdc_overlay *ovl = info->par;
1434 
1435     ovl->format =
1436         sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1437 
1438     ovl->xres = info->var.xres;
1439     ovl->xres_virtual = info->var.xres_virtual;
1440     ovl->yres = info->var.yres;
1441     ovl->yres_virtual = info->var.yres_virtual;
1442 
1443     if (ovl->format->yuv)
1444         ovl->pitch = info->var.xres_virtual;
1445     else
1446         ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1447 
1448     sh_mobile_lcdc_overlay_setup(ovl);
1449 
1450     info->fix.line_length = ovl->pitch;
1451 
1452     if (sh_mobile_format_is_fourcc(&info->var)) {
1453         info->fix.type = FB_TYPE_FOURCC;
1454         info->fix.visual = FB_VISUAL_FOURCC;
1455     } else {
1456         info->fix.type = FB_TYPE_PACKED_PIXELS;
1457         info->fix.visual = FB_VISUAL_TRUECOLOR;
1458     }
1459 
1460     return 0;
1461 }
1462 
1463 /* Overlay blanking. Disable the overlay when blanked. */
1464 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1465 {
1466     struct sh_mobile_lcdc_overlay *ovl = info->par;
1467 
1468     ovl->enabled = !blank;
1469     sh_mobile_lcdc_overlay_setup(ovl);
1470 
1471     /* Prevent the backlight from receiving a blanking event by returning
1472      * a non-zero value.
1473      */
1474     return 1;
1475 }
1476 
1477 static int
1478 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1479 {
1480     struct sh_mobile_lcdc_overlay *ovl = info->par;
1481 
1482     if (info->fbdefio)
1483         return fb_deferred_io_mmap(info, vma);
1484 
1485     return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1486                  ovl->dma_handle, ovl->fb_size);
1487 }
1488 
1489 static const struct fb_ops sh_mobile_lcdc_overlay_ops = {
1490     .owner          = THIS_MODULE,
1491     .fb_read        = fb_sys_read,
1492     .fb_write       = fb_sys_write,
1493     .fb_fillrect    = sys_fillrect,
1494     .fb_copyarea    = sys_copyarea,
1495     .fb_imageblit   = sys_imageblit,
1496     .fb_blank   = sh_mobile_lcdc_overlay_blank,
1497     .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1498     .fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
1499     .fb_check_var   = sh_mobile_lcdc_overlay_check_var,
1500     .fb_set_par = sh_mobile_lcdc_overlay_set_par,
1501     .fb_mmap    = sh_mobile_lcdc_overlay_mmap,
1502 };
1503 
1504 static void
1505 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1506 {
1507     struct fb_info *info = ovl->info;
1508 
1509     if (info == NULL || info->dev == NULL)
1510         return;
1511 
1512     unregister_framebuffer(ovl->info);
1513 }
1514 
1515 static int
1516 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1517 {
1518     struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1519     struct fb_info *info = ovl->info;
1520     unsigned int i;
1521     int ret;
1522 
1523     if (info == NULL)
1524         return 0;
1525 
1526     ret = register_framebuffer(info);
1527     if (ret < 0)
1528         return ret;
1529 
1530     dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1531          dev_name(lcdc->dev), ovl->index, info->var.xres,
1532          info->var.yres, info->var.bits_per_pixel);
1533 
1534     for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1535         ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1536         if (ret < 0)
1537             return ret;
1538     }
1539 
1540     return 0;
1541 }
1542 
1543 static void
1544 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1545 {
1546     struct fb_info *info = ovl->info;
1547 
1548     if (info == NULL || info->device == NULL)
1549         return;
1550 
1551     framebuffer_release(info);
1552 }
1553 
1554 static int
1555 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1556 {
1557     struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1558     struct fb_var_screeninfo *var;
1559     struct fb_info *info;
1560 
1561     /* Allocate and initialize the frame buffer device. */
1562     info = framebuffer_alloc(0, priv->dev);
1563     if (!info)
1564         return -ENOMEM;
1565 
1566     ovl->info = info;
1567 
1568     info->flags = FBINFO_FLAG_DEFAULT;
1569     info->fbops = &sh_mobile_lcdc_overlay_ops;
1570     info->device = priv->dev;
1571     info->screen_buffer = ovl->fb_mem;
1572     info->par = ovl;
1573 
1574     /* Initialize fixed screen information. Restrict pan to 2 lines steps
1575      * for NV12 and NV21.
1576      */
1577     info->fix = sh_mobile_lcdc_overlay_fix;
1578     snprintf(info->fix.id, sizeof(info->fix.id),
1579          "SH Mobile LCDC Overlay %u", ovl->index);
1580     info->fix.smem_start = ovl->dma_handle;
1581     info->fix.smem_len = ovl->fb_size;
1582     info->fix.line_length = ovl->pitch;
1583 
1584     if (ovl->format->yuv)
1585         info->fix.visual = FB_VISUAL_FOURCC;
1586     else
1587         info->fix.visual = FB_VISUAL_TRUECOLOR;
1588 
1589     switch (ovl->format->fourcc) {
1590     case V4L2_PIX_FMT_NV12:
1591     case V4L2_PIX_FMT_NV21:
1592         info->fix.ypanstep = 2;
1593         fallthrough;
1594     case V4L2_PIX_FMT_NV16:
1595     case V4L2_PIX_FMT_NV61:
1596         info->fix.xpanstep = 2;
1597     }
1598 
1599     /* Initialize variable screen information. */
1600     var = &info->var;
1601     memset(var, 0, sizeof(*var));
1602     var->xres = ovl->xres;
1603     var->yres = ovl->yres;
1604     var->xres_virtual = ovl->xres_virtual;
1605     var->yres_virtual = ovl->yres_virtual;
1606     var->activate = FB_ACTIVATE_NOW;
1607 
1608     /* Use the legacy API by default for RGB formats, and the FOURCC API
1609      * for YUV formats.
1610      */
1611     if (!ovl->format->yuv)
1612         var->bits_per_pixel = ovl->format->bpp;
1613     else
1614         var->grayscale = ovl->format->fourcc;
1615 
1616     return sh_mobile_lcdc_overlay_check_var(var, info);
1617 }
1618 
1619 /* -----------------------------------------------------------------------------
1620  * Frame buffer operations - main frame buffer
1621  */
1622 
1623 static int sh_mobile_lcdc_setcolreg(u_int regno,
1624                     u_int red, u_int green, u_int blue,
1625                     u_int transp, struct fb_info *info)
1626 {
1627     u32 *palette = info->pseudo_palette;
1628 
1629     if (regno >= PALETTE_NR)
1630         return -EINVAL;
1631 
1632     /* only FB_VISUAL_TRUECOLOR supported */
1633 
1634     red >>= 16 - info->var.red.length;
1635     green >>= 16 - info->var.green.length;
1636     blue >>= 16 - info->var.blue.length;
1637     transp >>= 16 - info->var.transp.length;
1638 
1639     palette[regno] = (red << info->var.red.offset) |
1640       (green << info->var.green.offset) |
1641       (blue << info->var.blue.offset) |
1642       (transp << info->var.transp.offset);
1643 
1644     return 0;
1645 }
1646 
1647 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
1648     .id =       "SH Mobile LCDC",
1649     .type =     FB_TYPE_PACKED_PIXELS,
1650     .visual =   FB_VISUAL_TRUECOLOR,
1651     .accel =    FB_ACCEL_NONE,
1652     .xpanstep = 1,
1653     .ypanstep = 1,
1654     .ywrapstep =    0,
1655     .capabilities = FB_CAP_FOURCC,
1656 };
1657 
1658 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1659                     const struct fb_fillrect *rect)
1660 {
1661     sys_fillrect(info, rect);
1662     sh_mobile_lcdc_deferred_io_touch(info);
1663 }
1664 
1665 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1666                     const struct fb_copyarea *area)
1667 {
1668     sys_copyarea(info, area);
1669     sh_mobile_lcdc_deferred_io_touch(info);
1670 }
1671 
1672 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1673                      const struct fb_image *image)
1674 {
1675     sys_imageblit(info, image);
1676     sh_mobile_lcdc_deferred_io_touch(info);
1677 }
1678 
1679 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1680                   struct fb_info *info)
1681 {
1682     struct sh_mobile_lcdc_chan *ch = info->par;
1683     struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1684     unsigned long ldrcntr;
1685     unsigned long base_addr_y, base_addr_c;
1686     unsigned long y_offset;
1687     unsigned long c_offset;
1688 
1689     if (!ch->format->yuv) {
1690         y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1691              * ch->format->bpp / 8;
1692         c_offset = 0;
1693     } else {
1694         unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1695         unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1696 
1697         y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1698         c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1699              + var->xoffset * 2 / xsub;
1700     }
1701 
1702     /* If the Y offset hasn't changed, the C offset hasn't either. There's
1703      * nothing to do in that case.
1704      */
1705     if (y_offset == ch->pan_y_offset)
1706         return 0;
1707 
1708     /* Set the source address for the next refresh */
1709     base_addr_y = ch->dma_handle + y_offset;
1710     base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1711             + c_offset;
1712 
1713     ch->base_addr_y = base_addr_y;
1714     ch->base_addr_c = base_addr_c;
1715     ch->pan_y_offset = y_offset;
1716 
1717     lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1718     if (ch->format->yuv)
1719         lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1720 
1721     ldrcntr = lcdc_read(priv, _LDRCNTR);
1722     if (lcdc_chan_is_sublcd(ch))
1723         lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1724     else
1725         lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1726 
1727 
1728     sh_mobile_lcdc_deferred_io_touch(info);
1729 
1730     return 0;
1731 }
1732 
1733 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1734                 unsigned long arg)
1735 {
1736     struct sh_mobile_lcdc_chan *ch = info->par;
1737     int retval;
1738 
1739     switch (cmd) {
1740     case FBIO_WAITFORVSYNC:
1741         retval = sh_mobile_lcdc_wait_for_vsync(ch);
1742         break;
1743 
1744     default:
1745         retval = -ENOIOCTLCMD;
1746         break;
1747     }
1748     return retval;
1749 }
1750 
1751 static void sh_mobile_fb_reconfig(struct fb_info *info)
1752 {
1753     struct sh_mobile_lcdc_chan *ch = info->par;
1754     struct fb_var_screeninfo var;
1755     struct fb_videomode mode;
1756 
1757     if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1758         /* More framebuffer users are active */
1759         return;
1760 
1761     fb_var_to_videomode(&mode, &info->var);
1762 
1763     if (fb_mode_is_equal(&ch->display.mode, &mode))
1764         return;
1765 
1766     /* Display has been re-plugged, framebuffer is free now, reconfigure */
1767     var = info->var;
1768     fb_videomode_to_var(&var, &ch->display.mode);
1769     var.width = ch->display.width;
1770     var.height = ch->display.height;
1771     var.activate = FB_ACTIVATE_NOW;
1772 
1773     if (fb_set_var(info, &var) < 0)
1774         /* Couldn't reconfigure, hopefully, can continue as before */
1775         return;
1776 
1777     fbcon_update_vcs(info, true);
1778 }
1779 
1780 /*
1781  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1782  * user == 1, or with console sem held, if user == 0.
1783  */
1784 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1785 {
1786     struct sh_mobile_lcdc_chan *ch = info->par;
1787 
1788     mutex_lock(&ch->open_lock);
1789     dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1790 
1791     ch->use_count--;
1792 
1793     /* Nothing to reconfigure, when called from fbcon */
1794     if (user) {
1795         console_lock();
1796         sh_mobile_fb_reconfig(info);
1797         console_unlock();
1798     }
1799 
1800     mutex_unlock(&ch->open_lock);
1801 
1802     return 0;
1803 }
1804 
1805 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1806 {
1807     struct sh_mobile_lcdc_chan *ch = info->par;
1808 
1809     mutex_lock(&ch->open_lock);
1810     ch->use_count++;
1811 
1812     dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1813     mutex_unlock(&ch->open_lock);
1814 
1815     return 0;
1816 }
1817 
1818 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1819                     struct fb_info *info)
1820 {
1821     struct sh_mobile_lcdc_chan *ch = info->par;
1822     struct sh_mobile_lcdc_priv *p = ch->lcdc;
1823     unsigned int best_dist = (unsigned int)-1;
1824     unsigned int best_xres = 0;
1825     unsigned int best_yres = 0;
1826     unsigned int i;
1827     int ret;
1828 
1829     /* If board code provides us with a list of available modes, make sure
1830      * we use one of them. Find the mode closest to the requested one. The
1831      * distance between two modes is defined as the size of the
1832      * non-overlapping parts of the two rectangles.
1833      */
1834     for (i = 0; i < ch->cfg->num_modes; ++i) {
1835         const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1836         unsigned int dist;
1837 
1838         /* We can only round up. */
1839         if (var->xres > mode->xres || var->yres > mode->yres)
1840             continue;
1841 
1842         dist = var->xres * var->yres + mode->xres * mode->yres
1843              - 2 * min(var->xres, mode->xres)
1844              * min(var->yres, mode->yres);
1845 
1846         if (dist < best_dist) {
1847             best_xres = mode->xres;
1848             best_yres = mode->yres;
1849             best_dist = dist;
1850         }
1851     }
1852 
1853     /* If no available mode can be used, return an error. */
1854     if (ch->cfg->num_modes != 0) {
1855         if (best_dist == (unsigned int)-1)
1856             return -EINVAL;
1857 
1858         var->xres = best_xres;
1859         var->yres = best_yres;
1860     }
1861 
1862     ret = __sh_mobile_lcdc_check_var(var, info);
1863     if (ret < 0)
1864         return ret;
1865 
1866     /* only accept the forced_fourcc for dual channel configurations */
1867     if (p->forced_fourcc &&
1868         p->forced_fourcc != sh_mobile_format_fourcc(var))
1869         return -EINVAL;
1870 
1871     return 0;
1872 }
1873 
1874 static int sh_mobile_lcdc_set_par(struct fb_info *info)
1875 {
1876     struct sh_mobile_lcdc_chan *ch = info->par;
1877     int ret;
1878 
1879     sh_mobile_lcdc_stop(ch->lcdc);
1880 
1881     ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1882     ch->colorspace = info->var.colorspace;
1883 
1884     ch->xres = info->var.xres;
1885     ch->xres_virtual = info->var.xres_virtual;
1886     ch->yres = info->var.yres;
1887     ch->yres_virtual = info->var.yres_virtual;
1888 
1889     if (ch->format->yuv)
1890         ch->pitch = info->var.xres_virtual;
1891     else
1892         ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
1893 
1894     ret = sh_mobile_lcdc_start(ch->lcdc);
1895     if (ret < 0)
1896         dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1897 
1898     info->fix.line_length = ch->pitch;
1899 
1900     if (sh_mobile_format_is_fourcc(&info->var)) {
1901         info->fix.type = FB_TYPE_FOURCC;
1902         info->fix.visual = FB_VISUAL_FOURCC;
1903     } else {
1904         info->fix.type = FB_TYPE_PACKED_PIXELS;
1905         info->fix.visual = FB_VISUAL_TRUECOLOR;
1906     }
1907 
1908     return ret;
1909 }
1910 
1911 /*
1912  * Screen blanking. Behavior is as follows:
1913  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1914  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1915  * FB_BLANK_VSYNC,
1916  * FB_BLANK_HSYNC,
1917  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1918  */
1919 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1920 {
1921     struct sh_mobile_lcdc_chan *ch = info->par;
1922     struct sh_mobile_lcdc_priv *p = ch->lcdc;
1923 
1924     /* blank the screen? */
1925     if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1926         struct fb_fillrect rect = {
1927             .width = ch->xres,
1928             .height = ch->yres,
1929         };
1930         sh_mobile_lcdc_fillrect(info, &rect);
1931     }
1932     /* turn clocks on? */
1933     if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1934         sh_mobile_lcdc_clk_on(p);
1935     }
1936     /* turn clocks off? */
1937     if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1938         /* make sure the screen is updated with the black fill before
1939          * switching the clocks off. one vsync is not enough since
1940          * blanking may occur in the middle of a refresh. deferred io
1941          * mode will reenable the clocks and update the screen in time,
1942          * so it does not need this. */
1943         if (!info->fbdefio) {
1944             sh_mobile_lcdc_wait_for_vsync(ch);
1945             sh_mobile_lcdc_wait_for_vsync(ch);
1946         }
1947         sh_mobile_lcdc_clk_off(p);
1948     }
1949 
1950     ch->blank_status = blank;
1951     return 0;
1952 }
1953 
1954 static int
1955 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
1956 {
1957     struct sh_mobile_lcdc_chan *ch = info->par;
1958 
1959     if (info->fbdefio)
1960         return fb_deferred_io_mmap(info, vma);
1961 
1962     return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
1963                  ch->dma_handle, ch->fb_size);
1964 }
1965 
1966 static const struct fb_ops sh_mobile_lcdc_ops = {
1967     .owner          = THIS_MODULE,
1968     .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
1969     .fb_read        = fb_sys_read,
1970     .fb_write       = fb_sys_write,
1971     .fb_fillrect    = sh_mobile_lcdc_fillrect,
1972     .fb_copyarea    = sh_mobile_lcdc_copyarea,
1973     .fb_imageblit   = sh_mobile_lcdc_imageblit,
1974     .fb_blank   = sh_mobile_lcdc_blank,
1975     .fb_pan_display = sh_mobile_lcdc_pan,
1976     .fb_ioctl       = sh_mobile_lcdc_ioctl,
1977     .fb_open    = sh_mobile_lcdc_open,
1978     .fb_release = sh_mobile_lcdc_release,
1979     .fb_check_var   = sh_mobile_lcdc_check_var,
1980     .fb_set_par = sh_mobile_lcdc_set_par,
1981     .fb_mmap    = sh_mobile_lcdc_mmap,
1982 };
1983 
1984 static void
1985 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
1986 {
1987     if (ch->info && ch->info->dev)
1988         unregister_framebuffer(ch->info);
1989 }
1990 
1991 static int
1992 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
1993 {
1994     struct fb_info *info = ch->info;
1995     int ret;
1996 
1997     if (info->fbdefio) {
1998         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1999                      ch->fb_size >> PAGE_SHIFT);
2000         if (!ch->sglist)
2001             return -ENOMEM;
2002     }
2003 
2004     info->bl_dev = ch->bl;
2005 
2006     ret = register_framebuffer(info);
2007     if (ret < 0)
2008         return ret;
2009 
2010     dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2011          dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2012          "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2013          info->var.bits_per_pixel);
2014 
2015     /* deferred io mode: disable clock to save power */
2016     if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2017         sh_mobile_lcdc_clk_off(ch->lcdc);
2018 
2019     return ret;
2020 }
2021 
2022 static void
2023 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2024 {
2025     struct fb_info *info = ch->info;
2026 
2027     if (!info || !info->device)
2028         return;
2029 
2030     vfree(ch->sglist);
2031 
2032     fb_dealloc_cmap(&info->cmap);
2033     framebuffer_release(info);
2034 }
2035 
2036 static int
2037 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2038                    const struct fb_videomode *modes,
2039                    unsigned int num_modes)
2040 {
2041     struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2042     struct fb_var_screeninfo *var;
2043     struct fb_info *info;
2044     int ret;
2045 
2046     /* Allocate and initialize the frame buffer device. Create the modes
2047      * list and allocate the color map.
2048      */
2049     info = framebuffer_alloc(0, priv->dev);
2050     if (!info)
2051         return -ENOMEM;
2052 
2053     ch->info = info;
2054 
2055     info->flags = FBINFO_FLAG_DEFAULT;
2056     info->fbops = &sh_mobile_lcdc_ops;
2057     info->device = priv->dev;
2058     info->screen_buffer = ch->fb_mem;
2059     info->pseudo_palette = &ch->pseudo_palette;
2060     info->par = ch;
2061 
2062     fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2063 
2064     ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2065     if (ret < 0) {
2066         dev_err(priv->dev, "unable to allocate cmap\n");
2067         return ret;
2068     }
2069 
2070     /* Initialize fixed screen information. Restrict pan to 2 lines steps
2071      * for NV12 and NV21.
2072      */
2073     info->fix = sh_mobile_lcdc_fix;
2074     info->fix.smem_start = ch->dma_handle;
2075     info->fix.smem_len = ch->fb_size;
2076     info->fix.line_length = ch->pitch;
2077 
2078     if (ch->format->yuv)
2079         info->fix.visual = FB_VISUAL_FOURCC;
2080     else
2081         info->fix.visual = FB_VISUAL_TRUECOLOR;
2082 
2083     switch (ch->format->fourcc) {
2084     case V4L2_PIX_FMT_NV12:
2085     case V4L2_PIX_FMT_NV21:
2086         info->fix.ypanstep = 2;
2087         fallthrough;
2088     case V4L2_PIX_FMT_NV16:
2089     case V4L2_PIX_FMT_NV61:
2090         info->fix.xpanstep = 2;
2091     }
2092 
2093     /* Initialize variable screen information using the first mode as
2094      * default.
2095      */
2096     var = &info->var;
2097     fb_videomode_to_var(var, modes);
2098     var->width = ch->display.width;
2099     var->height = ch->display.height;
2100     var->xres_virtual = ch->xres_virtual;
2101     var->yres_virtual = ch->yres_virtual;
2102     var->activate = FB_ACTIVATE_NOW;
2103 
2104     /* Use the legacy API by default for RGB formats, and the FOURCC API
2105      * for YUV formats.
2106      */
2107     if (!ch->format->yuv)
2108         var->bits_per_pixel = ch->format->bpp;
2109     else
2110         var->grayscale = ch->format->fourcc;
2111 
2112     ret = sh_mobile_lcdc_check_var(var, info);
2113     if (ret)
2114         return ret;
2115 
2116     return 0;
2117 }
2118 
2119 /* -----------------------------------------------------------------------------
2120  * Backlight
2121  */
2122 
2123 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2124 {
2125     struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2126     int brightness = bdev->props.brightness;
2127 
2128     if (bdev->props.power != FB_BLANK_UNBLANK ||
2129         bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2130         brightness = 0;
2131 
2132     ch->bl_brightness = brightness;
2133     return ch->cfg->bl_info.set_brightness(brightness);
2134 }
2135 
2136 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2137 {
2138     struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2139 
2140     return ch->bl_brightness;
2141 }
2142 
2143 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2144                    struct fb_info *info)
2145 {
2146     return (info->bl_dev == bdev);
2147 }
2148 
2149 static const struct backlight_ops sh_mobile_lcdc_bl_ops = {
2150     .options    = BL_CORE_SUSPENDRESUME,
2151     .update_status  = sh_mobile_lcdc_update_bl,
2152     .get_brightness = sh_mobile_lcdc_get_brightness,
2153     .check_fb   = sh_mobile_lcdc_check_fb,
2154 };
2155 
2156 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2157                            struct sh_mobile_lcdc_chan *ch)
2158 {
2159     struct backlight_device *bl;
2160 
2161     bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2162                        &sh_mobile_lcdc_bl_ops, NULL);
2163     if (IS_ERR(bl)) {
2164         dev_err(parent, "unable to register backlight device: %ld\n",
2165             PTR_ERR(bl));
2166         return NULL;
2167     }
2168 
2169     bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2170     bl->props.brightness = bl->props.max_brightness;
2171     backlight_update_status(bl);
2172 
2173     return bl;
2174 }
2175 
2176 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2177 {
2178     backlight_device_unregister(bdev);
2179 }
2180 
2181 /* -----------------------------------------------------------------------------
2182  * Power management
2183  */
2184 
2185 static int sh_mobile_lcdc_suspend(struct device *dev)
2186 {
2187     struct platform_device *pdev = to_platform_device(dev);
2188 
2189     sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2190     return 0;
2191 }
2192 
2193 static int sh_mobile_lcdc_resume(struct device *dev)
2194 {
2195     struct platform_device *pdev = to_platform_device(dev);
2196 
2197     return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2198 }
2199 
2200 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2201 {
2202     struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2203 
2204     /* turn off LCDC hardware */
2205     lcdc_write(priv, _LDCNT1R, 0);
2206 
2207     return 0;
2208 }
2209 
2210 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2211 {
2212     struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2213 
2214     __sh_mobile_lcdc_start(priv);
2215 
2216     return 0;
2217 }
2218 
2219 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2220     .suspend = sh_mobile_lcdc_suspend,
2221     .resume = sh_mobile_lcdc_resume,
2222     .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2223     .runtime_resume = sh_mobile_lcdc_runtime_resume,
2224 };
2225 
2226 /* -----------------------------------------------------------------------------
2227  * Framebuffer notifier
2228  */
2229 
2230 /* -----------------------------------------------------------------------------
2231  * Probe/remove and driver init/exit
2232  */
2233 
2234 static const struct fb_videomode default_720p = {
2235     .name = "HDMI 720p",
2236     .xres = 1280,
2237     .yres = 720,
2238 
2239     .left_margin = 220,
2240     .right_margin = 110,
2241     .hsync_len = 40,
2242 
2243     .upper_margin = 20,
2244     .lower_margin = 5,
2245     .vsync_len = 5,
2246 
2247     .pixclock = 13468,
2248     .refresh = 60,
2249     .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2250 };
2251 
2252 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2253 {
2254     struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2255     unsigned int i;
2256 
2257     for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2258         sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2259     for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2260         sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2261 
2262     sh_mobile_lcdc_stop(priv);
2263 
2264     for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2265         struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2266 
2267         sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2268 
2269         if (ovl->fb_mem)
2270             dma_free_coherent(&pdev->dev, ovl->fb_size,
2271                       ovl->fb_mem, ovl->dma_handle);
2272     }
2273 
2274     for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2275         struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2276 
2277         if (ch->tx_dev) {
2278             ch->tx_dev->lcdc = NULL;
2279             module_put(ch->cfg->tx_dev->dev.driver->owner);
2280         }
2281 
2282         sh_mobile_lcdc_channel_fb_cleanup(ch);
2283 
2284         if (ch->fb_mem)
2285             dma_free_coherent(&pdev->dev, ch->fb_size,
2286                       ch->fb_mem, ch->dma_handle);
2287     }
2288 
2289     for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2290         struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2291 
2292         if (ch->bl)
2293             sh_mobile_lcdc_bl_remove(ch->bl);
2294         mutex_destroy(&ch->open_lock);
2295     }
2296 
2297     if (priv->dot_clk) {
2298         pm_runtime_disable(&pdev->dev);
2299         clk_put(priv->dot_clk);
2300     }
2301 
2302     if (priv->base)
2303         iounmap(priv->base);
2304 
2305     if (priv->irq)
2306         free_irq(priv->irq, priv);
2307     kfree(priv);
2308     return 0;
2309 }
2310 
2311 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2312 {
2313     int interface_type = ch->cfg->interface_type;
2314 
2315     switch (interface_type) {
2316     case RGB8:
2317     case RGB9:
2318     case RGB12A:
2319     case RGB12B:
2320     case RGB16:
2321     case RGB18:
2322     case RGB24:
2323     case SYS8A:
2324     case SYS8B:
2325     case SYS8C:
2326     case SYS8D:
2327     case SYS9:
2328     case SYS12:
2329     case SYS16A:
2330     case SYS16B:
2331     case SYS16C:
2332     case SYS18:
2333     case SYS24:
2334         break;
2335     default:
2336         return -EINVAL;
2337     }
2338 
2339     /* SUBLCD only supports SYS interface */
2340     if (lcdc_chan_is_sublcd(ch)) {
2341         if (!(interface_type & LDMT1R_IFM))
2342             return -EINVAL;
2343 
2344         interface_type &= ~LDMT1R_IFM;
2345     }
2346 
2347     ch->ldmt1r_value = interface_type;
2348     return 0;
2349 }
2350 
2351 static int
2352 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2353 {
2354     const struct sh_mobile_lcdc_format_info *format;
2355     struct device *dev = ovl->channel->lcdc->dev;
2356     int ret;
2357 
2358     if (ovl->cfg->fourcc == 0)
2359         return 0;
2360 
2361     /* Validate the format. */
2362     format = sh_mobile_format_info(ovl->cfg->fourcc);
2363     if (format == NULL) {
2364         dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2365         return -EINVAL;
2366     }
2367 
2368     ovl->enabled = false;
2369     ovl->mode = LCDC_OVERLAY_BLEND;
2370     ovl->alpha = 255;
2371     ovl->rop3 = 0;
2372     ovl->pos_x = 0;
2373     ovl->pos_y = 0;
2374 
2375     /* The default Y virtual resolution is twice the panel size to allow for
2376      * double-buffering.
2377      */
2378     ovl->format = format;
2379     ovl->xres = ovl->cfg->max_xres;
2380     ovl->xres_virtual = ovl->xres;
2381     ovl->yres = ovl->cfg->max_yres;
2382     ovl->yres_virtual = ovl->yres * 2;
2383 
2384     if (!format->yuv)
2385         ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2386     else
2387         ovl->pitch = ovl->xres_virtual;
2388 
2389     /* Allocate frame buffer memory. */
2390     ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2391                * format->bpp / 8 * 2;
2392     ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2393                      GFP_KERNEL);
2394     if (!ovl->fb_mem) {
2395         dev_err(dev, "unable to allocate buffer\n");
2396         return -ENOMEM;
2397     }
2398 
2399     ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2400     if (ret < 0)
2401         return ret;
2402 
2403     return 0;
2404 }
2405 
2406 static int
2407 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2408 {
2409     const struct sh_mobile_lcdc_format_info *format;
2410     const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2411     struct device *dev = ch->lcdc->dev;
2412     const struct fb_videomode *max_mode;
2413     const struct fb_videomode *mode;
2414     unsigned int num_modes;
2415     unsigned int max_size;
2416     unsigned int i;
2417 
2418     /* Validate the format. */
2419     format = sh_mobile_format_info(cfg->fourcc);
2420     if (format == NULL) {
2421         dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2422         return -EINVAL;
2423     }
2424 
2425     /* Iterate through the modes to validate them and find the highest
2426      * resolution.
2427      */
2428     max_mode = NULL;
2429     max_size = 0;
2430 
2431     for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2432         unsigned int size = mode->yres * mode->xres;
2433 
2434         /* NV12/NV21 buffers must have even number of lines */
2435         if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2436              cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2437             dev_err(dev, "yres must be multiple of 2 for "
2438                 "YCbCr420 mode.\n");
2439             return -EINVAL;
2440         }
2441 
2442         if (size > max_size) {
2443             max_mode = mode;
2444             max_size = size;
2445         }
2446     }
2447 
2448     if (!max_size)
2449         max_size = MAX_XRES * MAX_YRES;
2450     else
2451         dev_dbg(dev, "Found largest videomode %ux%u\n",
2452             max_mode->xres, max_mode->yres);
2453 
2454     if (cfg->lcd_modes == NULL) {
2455         mode = &default_720p;
2456         num_modes = 1;
2457     } else {
2458         mode = cfg->lcd_modes;
2459         num_modes = cfg->num_modes;
2460     }
2461 
2462     /* Use the first mode as default. The default Y virtual resolution is
2463      * twice the panel size to allow for double-buffering.
2464      */
2465     ch->format = format;
2466     ch->xres = mode->xres;
2467     ch->xres_virtual = mode->xres;
2468     ch->yres = mode->yres;
2469     ch->yres_virtual = mode->yres * 2;
2470 
2471     if (!format->yuv) {
2472         ch->colorspace = V4L2_COLORSPACE_SRGB;
2473         ch->pitch = ch->xres_virtual * format->bpp / 8;
2474     } else {
2475         ch->colorspace = V4L2_COLORSPACE_REC709;
2476         ch->pitch = ch->xres_virtual;
2477     }
2478 
2479     ch->display.width = cfg->panel_cfg.width;
2480     ch->display.height = cfg->panel_cfg.height;
2481     ch->display.mode = *mode;
2482 
2483     /* Allocate frame buffer memory. */
2484     ch->fb_size = max_size * format->bpp / 8 * 2;
2485     ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2486                     GFP_KERNEL);
2487     if (ch->fb_mem == NULL) {
2488         dev_err(dev, "unable to allocate buffer\n");
2489         return -ENOMEM;
2490     }
2491 
2492     /* Initialize the transmitter device if present. */
2493     if (cfg->tx_dev) {
2494         if (!cfg->tx_dev->dev.driver ||
2495             !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2496             dev_warn(dev, "unable to get transmitter device\n");
2497             return -EINVAL;
2498         }
2499         ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2500         ch->tx_dev->lcdc = ch;
2501         ch->tx_dev->def_mode = *mode;
2502     }
2503 
2504     return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2505 }
2506 
2507 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2508 {
2509     struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2510     struct sh_mobile_lcdc_priv *priv;
2511     struct resource *res;
2512     int num_channels;
2513     int error;
2514     int irq, i;
2515 
2516     if (!pdata) {
2517         dev_err(&pdev->dev, "no platform data defined\n");
2518         return -EINVAL;
2519     }
2520 
2521     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2522     irq = platform_get_irq(pdev, 0);
2523     if (!res || irq < 0) {
2524         dev_err(&pdev->dev, "cannot get platform resources\n");
2525         return -ENOENT;
2526     }
2527 
2528     priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2529     if (!priv)
2530         return -ENOMEM;
2531 
2532     priv->dev = &pdev->dev;
2533 
2534     for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2535         mutex_init(&priv->ch[i].open_lock);
2536     platform_set_drvdata(pdev, priv);
2537 
2538     error = request_irq(irq, sh_mobile_lcdc_irq, 0,
2539                 dev_name(&pdev->dev), priv);
2540     if (error) {
2541         dev_err(&pdev->dev, "unable to request irq\n");
2542         goto err1;
2543     }
2544 
2545     priv->irq = irq;
2546     atomic_set(&priv->hw_usecnt, -1);
2547 
2548     for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2549         struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2550 
2551         ch->lcdc = priv;
2552         ch->cfg = &pdata->ch[i];
2553 
2554         error = sh_mobile_lcdc_check_interface(ch);
2555         if (error) {
2556             dev_err(&pdev->dev, "unsupported interface type\n");
2557             goto err1;
2558         }
2559         init_waitqueue_head(&ch->frame_end_wait);
2560         init_completion(&ch->vsync_completion);
2561 
2562         /* probe the backlight is there is one defined */
2563         if (ch->cfg->bl_info.max_brightness)
2564             ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2565 
2566         switch (pdata->ch[i].chan) {
2567         case LCDC_CHAN_MAINLCD:
2568             ch->enabled = LDCNT2R_ME;
2569             ch->reg_offs = lcdc_offs_mainlcd;
2570             num_channels++;
2571             break;
2572         case LCDC_CHAN_SUBLCD:
2573             ch->enabled = LDCNT2R_SE;
2574             ch->reg_offs = lcdc_offs_sublcd;
2575             num_channels++;
2576             break;
2577         }
2578     }
2579 
2580     if (!num_channels) {
2581         dev_err(&pdev->dev, "no channels defined\n");
2582         error = -EINVAL;
2583         goto err1;
2584     }
2585 
2586     /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2587     if (num_channels == 2)
2588         priv->forced_fourcc = pdata->ch[0].fourcc;
2589 
2590     priv->base = ioremap(res->start, resource_size(res));
2591     if (!priv->base) {
2592         error = -ENOMEM;
2593         goto err1;
2594     }
2595 
2596     error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2597     if (error) {
2598         dev_err(&pdev->dev, "unable to setup clocks\n");
2599         goto err1;
2600     }
2601 
2602     /* Enable runtime PM. */
2603     pm_runtime_enable(&pdev->dev);
2604 
2605     for (i = 0; i < num_channels; i++) {
2606         struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2607 
2608         error = sh_mobile_lcdc_channel_init(ch);
2609         if (error)
2610             goto err1;
2611     }
2612 
2613     for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2614         struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2615 
2616         ovl->cfg = &pdata->overlays[i];
2617         ovl->channel = &priv->ch[0];
2618 
2619         error = sh_mobile_lcdc_overlay_init(ovl);
2620         if (error)
2621             goto err1;
2622     }
2623 
2624     error = sh_mobile_lcdc_start(priv);
2625     if (error) {
2626         dev_err(&pdev->dev, "unable to start hardware\n");
2627         goto err1;
2628     }
2629 
2630     for (i = 0; i < num_channels; i++) {
2631         struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2632 
2633         error = sh_mobile_lcdc_channel_fb_register(ch);
2634         if (error)
2635             goto err1;
2636     }
2637 
2638     for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2639         struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2640 
2641         error = sh_mobile_lcdc_overlay_fb_register(ovl);
2642         if (error)
2643             goto err1;
2644     }
2645 
2646     return 0;
2647 err1:
2648     sh_mobile_lcdc_remove(pdev);
2649 
2650     return error;
2651 }
2652 
2653 static struct platform_driver sh_mobile_lcdc_driver = {
2654     .driver     = {
2655         .name       = "sh_mobile_lcdc_fb",
2656         .pm     = &sh_mobile_lcdc_dev_pm_ops,
2657     },
2658     .probe      = sh_mobile_lcdc_probe,
2659     .remove     = sh_mobile_lcdc_remove,
2660 };
2661 
2662 module_platform_driver(sh_mobile_lcdc_driver);
2663 
2664 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2665 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2666 MODULE_LICENSE("GPL v2");
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