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authorCedric Le Goater <clg@fr.ibm.com>2013-12-04 11:49:52 -0500
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-12-09 19:25:07 -0500
commite1edf18b20076da83dd231dbd2146cbbc31c0b14 (patch)
tree6e5e18f89477bb201cde20f37c98d1a657790c37 /drivers/video
parent212c0cbd5be721a39ef3e2f723e0c78008f9e955 (diff)
offb: Add palette hack for little endian
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>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/offb.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/video/offb.c b/drivers/video/offb.c
index 43a0a52fc527..7d44d669d5b6 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -91,6 +91,15 @@ extern boot_infos_t *boot_infos;
91#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4 91#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4
92#define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8 92#define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8
93 93
94#define FB_RIGHT_POS(p, bpp) (fb_be_math(p) ? 0 : (32 - (bpp)))
95
96static inline u32 offb_cmap_byteswap(struct fb_info *info, u32 value)
97{
98 u32 bpp = info->var.bits_per_pixel;
99
100 return cpu_to_be32(value) >> FB_RIGHT_POS(info, bpp);
101}
102
94 /* 103 /*
95 * Set a single color register. The values supplied are already 104 * Set a single color register. The values supplied are already
96 * rounded down to the hardware's capabilities (according to the 105 * 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,
120 mask <<= info->var.transp.offset; 129 mask <<= info->var.transp.offset;
121 value |= mask; 130 value |= mask;
122 } 131 }
123 pal[regno] = value; 132 pal[regno] = offb_cmap_byteswap(info, value);
124 return 0; 133 return 0;
125 } 134 }
126 135