offb: Add palette hack for little endian (e1edf18b) · Commits · 戴 / test

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>

drivers/video/offb.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

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