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fbdev: sh_mipi_dsi: add VMLEN1/VMLEN2 calculation

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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>
This commit is contained in:
Kuninori Morimoto 2011-11-08 20:35:05 -08:00 committed by Florian Tobias Schandinat
parent f832906a56
commit 08750617ba
1 changed files with 40 additions and 5 deletions
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45
drivers/video/sh_mipi_dsi.c
View file

@ -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);