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offb: Add palette hack for little endian

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The pseudo palette color entries need to be ajusted for little
endian.

This patch byteswaps the values in the pseudo palette depending
on the host endian order and the screen depth.

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Cedric Le Goater 2013-12-04 17:49:52 +01:00 committed by Benjamin Herrenschmidt
parent 212c0cbd5b
commit e1edf18b20
1 changed files with 10 additions and 1 deletions
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11
drivers/video/offb.c
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@ -91,6 +91,15 @@ extern boot_infos_t *boot_infos;
#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4
#define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8
#define FB_RIGHT_POS(p, bpp) (fb_be_math(p) ? 0 : (32 - (bpp)))
static inline u32 offb_cmap_byteswap(struct fb_info *info, u32 value)
{
u32 bpp = info->var.bits_per_pixel;
return cpu_to_be32(value) >> FB_RIGHT_POS(info, bpp);
}
/*
* Set a single color register. The values supplied are already
* rounded down to the hardware's capabilities (according to the
@ -120,7 +129,7 @@ static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
mask <<= info->var.transp.offset;
value |= mask;
}
pal[regno] = value;
pal[regno] = offb_cmap_byteswap(info, value);
return 0;
}