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| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2011-11-08 20:35:05 -0800 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2011-11-21 23:43:21 +0000 |
| commit | 08750617badd03fd95f33921a5213a5632022178 (patch) | |
| tree | ff9496b3f789bc667550b086a015ced87b80f259 /drivers/video/sh_mipi_dsi.c | |
| parent | f832906a56bcf9c597589e9a7898c1dd2f0513b9 (diff) | |
| download | linux-08750617badd03fd95f33921a5213a5632022178.tar.gz linux-08750617badd03fd95f33921a5213a5632022178.tar.bz2 linux-08750617badd03fd95f33921a5213a5632022178.zip | |
fbdev: sh_mipi_dsi: add VMLEN1/VMLEN2 calculation
VMLEN1/VMLEN2 needs blanking length which is calculated from
video image size.
The calculation methods are explained on
[SH MIPI] - [Video Mode] - [Blanking Packet setting]
But HFPLEN (= VMLEN2) is un-understandable.
For example, if SH-MIPI input was RGB888 (3byte),
output was RGB888 (3byte)
and 3lane connection, the date goes straight.
But if SH-MIPI input was RGB888 (3byte),
output was RGB565 (2byte)
and 4lane connection, it needs delay in HFPLEN.
Then (input cycle - output cycle) * lane is necessary the delay
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/sh_mipi_dsi.c')
| -rw-r--r-- | drivers/video/sh_mipi_dsi.c | 45 |
1 files changed, 40 insertions, 5 deletions
diff --git a/drivers/video/sh_mipi_dsi.c b/drivers/video/sh_mipi_dsi.c index b8c4873df710..190e941cf25d 100644 --- a/drivers/video/sh_mipi_dsi.c +++ b/drivers/video/sh_mipi_dsi.c @@ -42,6 +42,7 @@ #define VMCTR1 0x0020 #define VMCTR2 0x0024 #define VMLEN1 0x0028 +#define VMLEN2 0x002c #define CMTSRTREQ 0x0070 #define CMTSRTCTR 0x00d0 @@ -153,8 +154,9 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, void __iomem *base = mipi->base; struct sh_mobile_lcdc_chan_cfg *ch = pdata->lcd_chan; u32 pctype, datatype, pixfmt, linelength, vmctr2; + u32 tmp, top, bottom, delay; bool yuv; - u32 tmp; + int bpp; /* * Select data format. MIPI DSI is not hot-pluggable, so, we just use @@ -342,11 +344,44 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, iowrite32(vmctr2, mipi->linkbase + VMCTR2); /* - * 0x660 = 1632 bytes per line (RGB24, 544 pixels: see - * sh_mobile_lcdc_info.ch[0].lcd_cfg[0].xres), HSALEN = 1 - default - * (unused if VMCTR2[HSABM] = 0) + * VMLEN1 = RGBLEN | HSALEN + * + * see + * Video mode - Blanking Packet setting */ - iowrite32(1 | (linelength << 16), mipi->linkbase + VMLEN1); + top = linelength << 16; /* RGBLEN */ + bottom = 0x00000001; + if (pdata->flags & SH_MIPI_DSI_HSABM) /* HSALEN */ + bottom = (pdata->lane * ch->lcd_cfg[0].hsync_len) - 10; + iowrite32(top | bottom , mipi->linkbase + VMLEN1); + + /* + * VMLEN2 = HBPLEN | HFPLEN + * + * see + * Video mode - Blanking Packet setting + */ + top = 0x00010000; + bottom = 0x00000001; + delay = 0; + + if (pdata->flags & SH_MIPI_DSI_HFPBM) { /* HBPLEN */ + top = ch->lcd_cfg[0].hsync_len + ch->lcd_cfg[0].left_margin; + top = ((pdata->lane * top) - 10) << 16; + } + if (pdata->flags & SH_MIPI_DSI_HBPBM) { /* HFPLEN */ + bottom = ch->lcd_cfg[0].right_margin; + bottom = (pdata->lane * bottom) - 12; + } + + bpp = linelength / ch->lcd_cfg[0].xres; /* byte / pixel */ + if (pdata->lane > bpp) { + tmp = ch->lcd_cfg[0].xres / bpp; /* output cycle */ + tmp = ch->lcd_cfg[0].xres - tmp; /* (input - output) cycle */ + delay = (pdata->lane * tmp); + } + + iowrite32(top | (bottom + delay) , mipi->linkbase + VMLEN2); msleep(5); |