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fb: add support for foreign endianness

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Add support for the framebuffers with non-native endianness.  This is done via
FBINFO_FOREIGN_ENDIAN flag that will be used by the drivers.  Depending on the
host endianness this flag will be overwritten by FBINFO_BE_MATH internal flag,
or cleared.

Tested to work on MPC8360E-RDK (BE) + Fujitsu MINT framebuffer (LE).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: <Valdis.Kletnieks@vt.edu>
Cc: Clemens Koller <clemens.koller@anagramm.de>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Anton Vorontsov
2008-04-28 02:14:49 -07:00
committato da Linus Torvalds
parent 6b745b6fd0
commit e4c690e061
10 ha cambiato i file con 228 aggiunte e 140 eliminazioni
Scarica il file Patch Scarica il file Diff Expand all files Collapse all files

47
drivers/video/sysimgblt.c
Vedi File

@@ -23,30 +23,26 @@
#define DPRINTK(fmt, args...)
#endif
static const u32 cfb_tab8[] = {
#if defined(__BIG_ENDIAN)
static const u32 cfb_tab8_be[] = {
0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
0xffff0000,0xffff00ff,0xffffff00,0xffffffff
#elif defined(__LITTLE_ENDIAN)
};
static const u32 cfb_tab8_le[] = {
0x00000000,0xff000000,0x00ff0000,0xffff0000,
0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
#else
#error FIXME: No endianness??
#endif
};
static const u32 cfb_tab16[] = {
#if defined(__BIG_ENDIAN)
static const u32 cfb_tab16_be[] = {
0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
#elif defined(__LITTLE_ENDIAN)
};
static const u32 cfb_tab16_le[] = {
0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
#else
#error FIXME: No endianness??
#endif
};
static const u32 cfb_tab32[] = {
@@ -72,7 +68,7 @@ static void color_imageblit(const struct fb_image *image, struct fb_info *p,
val = 0;
if (start_index) {
u32 start_mask = ~(FB_SHIFT_HIGH(~(u32)0,
u32 start_mask = ~(FB_SHIFT_HIGH(p, ~(u32)0,
start_index));
val = *dst & start_mask;
shift = start_index;
@@ -83,20 +79,20 @@ static void color_imageblit(const struct fb_image *image, struct fb_info *p,
color = palette[*src];
else
color = *src;
color <<= FB_LEFT_POS(bpp);
val |= FB_SHIFT_HIGH(color, shift);
color <<= FB_LEFT_POS(p, bpp);
val |= FB_SHIFT_HIGH(p, color, shift);
if (shift >= null_bits) {
*dst++ = val;
val = (shift == null_bits) ? 0 :
FB_SHIFT_LOW(color, 32 - shift);
FB_SHIFT_LOW(p, color, 32 - shift);
}
shift += bpp;
shift &= (32 - 1);
src++;
}
if (shift) {
u32 end_mask = FB_SHIFT_HIGH(~(u32)0, shift);
u32 end_mask = FB_SHIFT_HIGH(p, ~(u32)0, shift);
*dst &= end_mask;
*dst |= val;
@@ -125,8 +121,8 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
u32 i, j, l;
dst2 = dst1;
fgcolor <<= FB_LEFT_POS(bpp);
bgcolor <<= FB_LEFT_POS(bpp);
fgcolor <<= FB_LEFT_POS(p, bpp);
bgcolor <<= FB_LEFT_POS(p, bpp);
for (i = image->height; i--; ) {
shift = val = 0;
@@ -137,7 +133,8 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
/* write leading bits */
if (start_index) {
u32 start_mask = ~(FB_SHIFT_HIGH(~(u32)0,start_index));
u32 start_mask = ~(FB_SHIFT_HIGH(p, ~(u32)0,
start_index));
val = *dst & start_mask;
shift = start_index;
}
@@ -145,13 +142,13 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
while (j--) {
l--;
color = (*s & (1 << l)) ? fgcolor : bgcolor;
val |= FB_SHIFT_HIGH(color, shift);
val |= FB_SHIFT_HIGH(p, color, shift);
/* Did the bitshift spill bits to the next long? */
if (shift >= null_bits) {
*dst++ = val;
val = (shift == null_bits) ? 0 :
FB_SHIFT_LOW(color,32 - shift);
FB_SHIFT_LOW(p, color, 32 - shift);
}
shift += bpp;
shift &= (32 - 1);
@@ -160,7 +157,7 @@ static void slow_imageblit(const struct fb_image *image, struct fb_info *p,
/* write trailing bits */
if (shift) {
u32 end_mask = FB_SHIFT_HIGH(~(u32)0, shift);
u32 end_mask = FB_SHIFT_HIGH(p, ~(u32)0, shift);
*dst &= end_mask;
*dst |= val;
@@ -199,10 +196,10 @@ static void fast_imageblit(const struct fb_image *image, struct fb_info *p,
switch (bpp) {
case 8:
tab = cfb_tab8;
tab = fb_be_math(p) ? cfb_tab8_be : cfb_tab8_le;
break;
case 16:
tab = cfb_tab16;
tab = fb_be_math(p) ? cfb_tab16_be : cfb_tab16_le;
break;
case 32:
default: