fb: add support for foreign endianness
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>
diff --git a/drivers/video/cfbcopyarea.c b/drivers/video/cfbcopyarea.c
index b07e419..df03f37 100644
--- a/drivers/video/cfbcopyarea.c
+++ b/drivers/video/cfbcopyarea.c
@@ -44,15 +44,16 @@
*/
static void
-bitcpy(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src,
- int src_idx, int bits, unsigned n, u32 bswapmask)
+bitcpy(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
+ const unsigned long __iomem *src, int src_idx, int bits,
+ unsigned n, u32 bswapmask)
{
unsigned long first, last;
int const shift = dst_idx-src_idx;
int left, right;
- first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
- last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
+ first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
+ last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
if (!shift) {
// Same alignment for source and dest
@@ -202,8 +203,9 @@
*/
static void
-bitcpy_rev(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src,
- int src_idx, int bits, unsigned n, u32 bswapmask)
+bitcpy_rev(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
+ const unsigned long __iomem *src, int src_idx, int bits,
+ unsigned n, u32 bswapmask)
{
unsigned long first, last;
int shift;
@@ -221,8 +223,9 @@
shift = dst_idx-src_idx;
- first = fb_shifted_pixels_mask_long(bits - 1 - dst_idx, bswapmask);
- last = ~fb_shifted_pixels_mask_long(bits - 1 - ((dst_idx-n) % bits), bswapmask);
+ first = fb_shifted_pixels_mask_long(p, bits - 1 - dst_idx, bswapmask);
+ last = ~fb_shifted_pixels_mask_long(p, bits - 1 - ((dst_idx-n) % bits),
+ bswapmask);
if (!shift) {
// Same alignment for source and dest
@@ -404,7 +407,7 @@
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
- bitcpy_rev(dst, dst_idx, src, src_idx, bits,
+ bitcpy_rev(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel, bswapmask);
}
} else {
@@ -413,7 +416,7 @@
dst_idx &= (bytes - 1);
src += src_idx >> (ffs(bits) - 1);
src_idx &= (bytes - 1);
- bitcpy(dst, dst_idx, src, src_idx, bits,
+ bitcpy(p, dst, dst_idx, src, src_idx, bits,
width*p->var.bits_per_pixel, bswapmask);
dst_idx += bits_per_line;
src_idx += bits_per_line;