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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>
This commit is contained in:
Anton Vorontsov
Linus Torvalds
parent
6b745b6fd0
commit
e4c690e061
@ -139,6 +139,30 @@ config FB_SYS_IMAGEBLIT
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blitting. This is used by drivers that don't provide their own
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(accelerated) version and the framebuffer is in system RAM.
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menuconfig FB_FOREIGN_ENDIAN
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bool "Framebuffer foreign endianness support"
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depends on FB
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---help---
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This menu will let you enable support for the framebuffers with
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non-native endianness (e.g. Little-Endian framebuffer on a
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Big-Endian machine). Most probably you don't have such hardware,
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so it's safe to say "n" here.
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choice
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prompt "Choice endianness support"
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depends on FB_FOREIGN_ENDIAN
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config FB_BOTH_ENDIAN
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bool "Support for Big- and Little-Endian framebuffers"
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config FB_BIG_ENDIAN
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bool "Support for Big-Endian framebuffers only"
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config FB_LITTLE_ENDIAN
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bool "Support for Little-Endian framebuffers only"
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endchoice
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config FB_SYS_FOPS
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tristate
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depends on FB
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@ -44,15 +44,16 @@
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*/
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static void
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bitcpy(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src,
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int src_idx, int bits, unsigned n, u32 bswapmask)
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bitcpy(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
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const unsigned long __iomem *src, int src_idx, int bits,
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unsigned n, u32 bswapmask)
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{
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unsigned long first, last;
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int const shift = dst_idx-src_idx;
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int left, right;
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first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
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first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
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if (!shift) {
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// Same alignment for source and dest
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@ -202,8 +203,9 @@ bitcpy(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src
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*/
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static void
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bitcpy_rev(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem *src,
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int src_idx, int bits, unsigned n, u32 bswapmask)
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bitcpy_rev(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
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const unsigned long __iomem *src, int src_idx, int bits,
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unsigned n, u32 bswapmask)
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{
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unsigned long first, last;
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int shift;
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@ -221,8 +223,9 @@ bitcpy_rev(unsigned long __iomem *dst, int dst_idx, const unsigned long __iomem
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shift = dst_idx-src_idx;
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first = fb_shifted_pixels_mask_long(bits - 1 - dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long(bits - 1 - ((dst_idx-n) % bits), bswapmask);
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first = fb_shifted_pixels_mask_long(p, bits - 1 - dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long(p, bits - 1 - ((dst_idx-n) % bits),
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bswapmask);
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if (!shift) {
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// Same alignment for source and dest
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@ -404,7 +407,7 @@ void cfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
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dst_idx &= (bytes - 1);
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src += src_idx >> (ffs(bits) - 1);
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src_idx &= (bytes - 1);
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bitcpy_rev(dst, dst_idx, src, src_idx, bits,
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bitcpy_rev(p, dst, dst_idx, src, src_idx, bits,
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width*p->var.bits_per_pixel, bswapmask);
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}
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} else {
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@ -413,7 +416,7 @@ void cfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
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dst_idx &= (bytes - 1);
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src += src_idx >> (ffs(bits) - 1);
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src_idx &= (bytes - 1);
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bitcpy(dst, dst_idx, src, src_idx, bits,
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bitcpy(p, dst, dst_idx, src, src_idx, bits,
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width*p->var.bits_per_pixel, bswapmask);
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dst_idx += bits_per_line;
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src_idx += bits_per_line;
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@ -36,16 +36,16 @@
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*/
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static void
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bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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unsigned n, int bits, u32 bswapmask)
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bitfill_aligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
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unsigned long pat, unsigned n, int bits, u32 bswapmask)
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{
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unsigned long first, last;
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if (!n)
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return;
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first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
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first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
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if (dst_idx+n <= bits) {
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// Single word
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@ -93,16 +93,16 @@ bitfill_aligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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*/
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static void
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bitfill_unaligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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int left, int right, unsigned n, int bits)
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bitfill_unaligned(struct fb_info *p, unsigned long __iomem *dst, int dst_idx,
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unsigned long pat, int left, int right, unsigned n, int bits)
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{
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unsigned long first, last;
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if (!n)
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return;
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first = FB_SHIFT_HIGH(~0UL, dst_idx);
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last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
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first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
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last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
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if (dst_idx+n <= bits) {
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// Single word
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@ -147,8 +147,9 @@ bitfill_unaligned(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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* Aligned pattern invert using 32/64-bit memory accesses
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*/
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static void
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bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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unsigned n, int bits, u32 bswapmask)
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bitfill_aligned_rev(struct fb_info *p, unsigned long __iomem *dst,
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int dst_idx, unsigned long pat, unsigned n, int bits,
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u32 bswapmask)
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{
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unsigned long val = pat, dat;
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unsigned long first, last;
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@ -156,8 +157,8 @@ bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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if (!n)
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return;
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first = fb_shifted_pixels_mask_long(dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long((dst_idx+n) % bits, bswapmask);
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first = fb_shifted_pixels_mask_long(p, dst_idx, bswapmask);
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last = ~fb_shifted_pixels_mask_long(p, (dst_idx+n) % bits, bswapmask);
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if (dst_idx+n <= bits) {
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// Single word
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@ -217,16 +218,17 @@ bitfill_aligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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*/
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static void
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bitfill_unaligned_rev(unsigned long __iomem *dst, int dst_idx, unsigned long pat,
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int left, int right, unsigned n, int bits)
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bitfill_unaligned_rev(struct fb_info *p, unsigned long __iomem *dst,
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int dst_idx, unsigned long pat, int left, int right,
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unsigned n, int bits)
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{
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unsigned long first, last, dat;
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if (!n)
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return;
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first = FB_SHIFT_HIGH(~0UL, dst_idx);
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last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
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first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
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last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
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if (dst_idx+n <= bits) {
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// Single word
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@ -306,7 +308,8 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
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p->fbops->fb_sync(p);
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if (!left) {
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u32 bswapmask = fb_compute_bswapmask(p);
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void (*fill_op32)(unsigned long __iomem *dst, int dst_idx,
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void (*fill_op32)(struct fb_info *p,
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unsigned long __iomem *dst, int dst_idx,
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unsigned long pat, unsigned n, int bits,
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u32 bswapmask) = NULL;
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@ -325,16 +328,17 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
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while (height--) {
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dst += dst_idx >> (ffs(bits) - 1);
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dst_idx &= (bits - 1);
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fill_op32(dst, dst_idx, pat, width*bpp, bits, bswapmask);
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fill_op32(p, dst, dst_idx, pat, width*bpp, bits,
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bswapmask);
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dst_idx += p->fix.line_length*8;
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}
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} else {
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int right;
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int r;
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int rot = (left-dst_idx) % bpp;
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void (*fill_op)(unsigned long __iomem *dst, int dst_idx,
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unsigned long pat, int left, int right,
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unsigned n, int bits) = NULL;
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void (*fill_op)(struct fb_info *p, unsigned long __iomem *dst,
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int dst_idx, unsigned long pat, int left,
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int right, unsigned n, int bits) = NULL;
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/* rotate pattern to correct start position */
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pat = pat << rot | pat >> (bpp-rot);
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@ -355,7 +359,7 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
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while (height--) {
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dst += dst_idx >> (ffs(bits) - 1);
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dst_idx &= (bits - 1);
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fill_op(dst, dst_idx, pat, left, right,
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fill_op(p, dst, dst_idx, pat, left, right,
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width*bpp, bits);
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r = (p->fix.line_length*8) % bpp;
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pat = pat << (bpp-r) | pat >> r;
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@ -43,30 +43,26 @@
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#define DPRINTK(fmt, args...)
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#endif
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static const u32 cfb_tab8[] = {
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#if defined(__BIG_ENDIAN)
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static const u32 cfb_tab8_be[] = {
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0x00000000,0x000000ff,0x0000ff00,0x0000ffff,
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0x00ff0000,0x00ff00ff,0x00ffff00,0x00ffffff,
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0xff000000,0xff0000ff,0xff00ff00,0xff00ffff,
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0xffff0000,0xffff00ff,0xffffff00,0xffffffff
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#elif defined(__LITTLE_ENDIAN)
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};
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static const u32 cfb_tab8_le[] = {
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0x00000000,0xff000000,0x00ff0000,0xffff0000,
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0x0000ff00,0xff00ff00,0x00ffff00,0xffffff00,
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0x000000ff,0xff0000ff,0x00ff00ff,0xffff00ff,
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0x0000ffff,0xff00ffff,0x00ffffff,0xffffffff
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#else
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#error FIXME: No endianness??
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#endif
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};
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static const u32 cfb_tab16[] = {
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#if defined(__BIG_ENDIAN)
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static const u32 cfb_tab16_be[] = {
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0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
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#elif defined(__LITTLE_ENDIAN)
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};
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static const u32 cfb_tab16_le[] = {
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0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
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#else
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#error FIXME: No endianness??
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#endif
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};
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static const u32 cfb_tab32[] = {
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@ -98,7 +94,8 @@ static inline void color_imageblit(const struct fb_image *image,
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val = 0;
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if (start_index) {
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u32 start_mask = ~fb_shifted_pixels_mask_u32(start_index, bswapmask);
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u32 start_mask = ~fb_shifted_pixels_mask_u32(p,
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start_index, bswapmask);
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val = FB_READL(dst) & start_mask;
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shift = start_index;
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}
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@ -108,20 +105,21 @@ static inline void color_imageblit(const struct fb_image *image,
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color = palette[*src];
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else
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color = *src;
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color <<= FB_LEFT_POS(bpp);
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val |= FB_SHIFT_HIGH(color, shift ^ bswapmask);
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color <<= FB_LEFT_POS(p, bpp);
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val |= FB_SHIFT_HIGH(p, color, shift ^ bswapmask);
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if (shift >= null_bits) {
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FB_WRITEL(val, dst++);
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val = (shift == null_bits) ? 0 :
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FB_SHIFT_LOW(color, 32 - shift);
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FB_SHIFT_LOW(p, color, 32 - shift);
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}
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shift += bpp;
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shift &= (32 - 1);
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src++;
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}
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if (shift) {
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u32 end_mask = fb_shifted_pixels_mask_u32(shift, bswapmask);
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u32 end_mask = fb_shifted_pixels_mask_u32(p, shift,
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bswapmask);
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FB_WRITEL((FB_READL(dst) & end_mask) | val, dst);
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}
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@ -152,8 +150,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
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u32 bswapmask = fb_compute_bswapmask(p);
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dst2 = (u32 __iomem *) dst1;
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fgcolor <<= FB_LEFT_POS(bpp);
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bgcolor <<= FB_LEFT_POS(bpp);
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fgcolor <<= FB_LEFT_POS(p, bpp);
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bgcolor <<= FB_LEFT_POS(p, bpp);
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for (i = image->height; i--; ) {
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shift = val = 0;
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@ -164,7 +162,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
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/* write leading bits */
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if (start_index) {
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u32 start_mask = ~fb_shifted_pixels_mask_u32(start_index, bswapmask);
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u32 start_mask = ~fb_shifted_pixels_mask_u32(p,
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start_index, bswapmask);
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val = FB_READL(dst) & start_mask;
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shift = start_index;
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}
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@ -172,13 +171,13 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
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while (j--) {
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l--;
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color = (*s & (1 << l)) ? fgcolor : bgcolor;
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val |= FB_SHIFT_HIGH(color, shift ^ bswapmask);
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val |= FB_SHIFT_HIGH(p, color, shift ^ bswapmask);
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/* Did the bitshift spill bits to the next long? */
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if (shift >= null_bits) {
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FB_WRITEL(val, dst++);
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val = (shift == null_bits) ? 0 :
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FB_SHIFT_LOW(color,32 - shift);
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FB_SHIFT_LOW(p, color, 32 - shift);
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}
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shift += bpp;
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shift &= (32 - 1);
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@ -187,7 +186,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
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/* write trailing bits */
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if (shift) {
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u32 end_mask = fb_shifted_pixels_mask_u32(shift, bswapmask);
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u32 end_mask = fb_shifted_pixels_mask_u32(p, shift,
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bswapmask);
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FB_WRITEL((FB_READL(dst) & end_mask) | val, dst);
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}
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@ -223,13 +223,13 @@ static inline void fast_imageblit(const struct fb_image *image, struct fb_info *
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u32 __iomem *dst;
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const u32 *tab = NULL;
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int i, j, k;
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switch (bpp) {
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case 8:
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tab = cfb_tab8;
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tab = fb_be_math(p) ? cfb_tab8_be : cfb_tab8_le;
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break;
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case 16:
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tab = cfb_tab16;
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tab = fb_be_math(p) ? cfb_tab16_be : cfb_tab16_le;
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break;
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case 32:
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default:
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@ -94,41 +94,44 @@ static inline unsigned long fb_rev_pixels_in_long(unsigned long val,
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return val;
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}
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static inline u32 fb_shifted_pixels_mask_u32(u32 index, u32 bswapmask)
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static inline u32 fb_shifted_pixels_mask_u32(struct fb_info *p, u32 index,
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u32 bswapmask)
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{
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u32 mask;
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if (!bswapmask) {
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mask = FB_SHIFT_HIGH(~(u32)0, index);
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mask = FB_SHIFT_HIGH(p, ~(u32)0, index);
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} else {
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mask = 0xff << FB_LEFT_POS(8);
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mask = FB_SHIFT_LOW(mask, index & (bswapmask)) & mask;
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mask = FB_SHIFT_HIGH(mask, index & ~(bswapmask));
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mask = 0xff << FB_LEFT_POS(p, 8);
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mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask;
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mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask));
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#if defined(__i386__) || defined(__x86_64__)
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/* Shift argument is limited to 0 - 31 on x86 based CPU's */
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if(index + bswapmask < 32)
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#endif
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mask |= FB_SHIFT_HIGH(~(u32)0,
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mask |= FB_SHIFT_HIGH(p, ~(u32)0,
|
||||
(index + bswapmask) & ~(bswapmask));
|
||||
}
|
||||
return mask;
|
||||
}
|
||||
|
||||
static inline unsigned long fb_shifted_pixels_mask_long(u32 index, u32 bswapmask)
|
||||
static inline unsigned long fb_shifted_pixels_mask_long(struct fb_info *p,
|
||||
u32 index,
|
||||
u32 bswapmask)
|
||||
{
|
||||
unsigned long mask;
|
||||
|
||||
if (!bswapmask) {
|
||||
mask = FB_SHIFT_HIGH(~0UL, index);
|
||||
mask = FB_SHIFT_HIGH(p, ~0UL, index);
|
||||
} else {
|
||||
mask = 0xff << FB_LEFT_POS(8);
|
||||
mask = FB_SHIFT_LOW(mask, index & (bswapmask)) & mask;
|
||||
mask = FB_SHIFT_HIGH(mask, index & ~(bswapmask));
|
||||
mask = 0xff << FB_LEFT_POS(p, 8);
|
||||
mask = FB_SHIFT_LOW(p, mask, index & (bswapmask)) & mask;
|
||||
mask = FB_SHIFT_HIGH(p, mask, index & ~(bswapmask));
|
||||
#if defined(__i386__) || defined(__x86_64__)
|
||||
/* Shift argument is limited to 0 - 31 on x86 based CPU's */
|
||||
if(index + bswapmask < BITS_PER_LONG)
|
||||
#endif
|
||||
mask |= FB_SHIFT_HIGH(~0UL,
|
||||
mask |= FB_SHIFT_HIGH(p, ~0UL,
|
||||
(index + bswapmask) & ~(bswapmask));
|
||||
}
|
||||
return mask;
|
||||
@ -158,8 +161,8 @@ static inline unsigned long fb_rev_pixels_in_long(unsigned long val,
|
||||
return val;
|
||||
}
|
||||
|
||||
#define fb_shifted_pixels_mask_u32(i, b) FB_SHIFT_HIGH(~(u32)0, (i))
|
||||
#define fb_shifted_pixels_mask_long(i, b) FB_SHIFT_HIGH(~0UL, (i))
|
||||
#define fb_shifted_pixels_mask_u32(p, i, b) FB_SHIFT_HIGH((p), ~(u32)0, (i))
|
||||
#define fb_shifted_pixels_mask_long(p, i, b) FB_SHIFT_HIGH((p), ~0UL, (i))
|
||||
#define fb_compute_bswapmask(...) 0
|
||||
|
||||
#endif /* CONFIG_FB_CFB_REV_PIXELS_IN_BYTE */
|
||||
|
||||
@ -1352,6 +1352,32 @@ static const struct file_operations fb_fops = {
|
||||
|
||||
struct class *fb_class;
|
||||
EXPORT_SYMBOL(fb_class);
|
||||
|
||||
static int fb_check_foreignness(struct fb_info *fi)
|
||||
{
|
||||
const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
|
||||
|
||||
fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
|
||||
|
||||
#ifdef __BIG_ENDIAN
|
||||
fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
|
||||
#else
|
||||
fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
|
||||
#endif /* __BIG_ENDIAN */
|
||||
|
||||
if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
|
||||
pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
|
||||
"support this framebuffer\n", fi->fix.id);
|
||||
return -ENOSYS;
|
||||
} else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
|
||||
pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
|
||||
"support this framebuffer\n", fi->fix.id);
|
||||
return -ENOSYS;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* register_framebuffer - registers a frame buffer device
|
||||
* @fb_info: frame buffer info structure
|
||||
@ -1371,6 +1397,10 @@ register_framebuffer(struct fb_info *fb_info)
|
||||
|
||||
if (num_registered_fb == FB_MAX)
|
||||
return -ENXIO;
|
||||
|
||||
if (fb_check_foreignness(fb_info))
|
||||
return -ENOSYS;
|
||||
|
||||
num_registered_fb++;
|
||||
for (i = 0 ; i < FB_MAX; i++)
|
||||
if (!registered_fb[i])
|
||||
|
||||
@ -26,15 +26,15 @@
|
||||
*/
|
||||
|
||||
static void
|
||||
bitcpy(unsigned long *dst, int dst_idx, const unsigned long *src,
|
||||
int src_idx, int bits, unsigned n)
|
||||
bitcpy(struct fb_info *p, unsigned long *dst, int dst_idx,
|
||||
const unsigned long *src, int src_idx, int bits, unsigned n)
|
||||
{
|
||||
unsigned long first, last;
|
||||
int const shift = dst_idx-src_idx;
|
||||
int left, right;
|
||||
|
||||
first = FB_SHIFT_HIGH(~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
|
||||
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
|
||||
|
||||
if (!shift) {
|
||||
/* Same alignment for source and dest */
|
||||
@ -167,8 +167,8 @@ bitcpy(unsigned long *dst, int dst_idx, const unsigned long *src,
|
||||
*/
|
||||
|
||||
static void
|
||||
bitcpy_rev(unsigned long *dst, int dst_idx, const unsigned long *src,
|
||||
int src_idx, int bits, unsigned n)
|
||||
bitcpy_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
|
||||
const unsigned long *src, int src_idx, int bits, unsigned n)
|
||||
{
|
||||
unsigned long first, last;
|
||||
int shift;
|
||||
@ -186,8 +186,8 @@ bitcpy_rev(unsigned long *dst, int dst_idx, const unsigned long *src,
|
||||
|
||||
shift = dst_idx-src_idx;
|
||||
|
||||
first = FB_SHIFT_LOW(~0UL, bits - 1 - dst_idx);
|
||||
last = ~(FB_SHIFT_LOW(~0UL, bits - 1 - ((dst_idx-n) % bits)));
|
||||
first = FB_SHIFT_LOW(p, ~0UL, bits - 1 - dst_idx);
|
||||
last = ~(FB_SHIFT_LOW(p, ~0UL, bits - 1 - ((dst_idx-n) % bits)));
|
||||
|
||||
if (!shift) {
|
||||
/* Same alignment for source and dest */
|
||||
@ -353,7 +353,7 @@ void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area)
|
||||
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);
|
||||
}
|
||||
} else {
|
||||
@ -362,7 +362,7 @@ void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area)
|
||||
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);
|
||||
dst_idx += bits_per_line;
|
||||
src_idx += bits_per_line;
|
||||
|
||||
@ -22,16 +22,16 @@
|
||||
*/
|
||||
|
||||
static void
|
||||
bitfill_aligned(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
unsigned n, int bits)
|
||||
bitfill_aligned(struct fb_info *p, unsigned long *dst, int dst_idx,
|
||||
unsigned long pat, unsigned n, int bits)
|
||||
{
|
||||
unsigned long first, last;
|
||||
|
||||
if (!n)
|
||||
return;
|
||||
|
||||
first = FB_SHIFT_HIGH(~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
|
||||
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
|
||||
|
||||
if (dst_idx+n <= bits) {
|
||||
/* Single word */
|
||||
@ -78,16 +78,16 @@ bitfill_aligned(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
*/
|
||||
|
||||
static void
|
||||
bitfill_unaligned(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
int left, int right, unsigned n, int bits)
|
||||
bitfill_unaligned(struct fb_info *p, unsigned long *dst, int dst_idx,
|
||||
unsigned long pat, int left, int right, unsigned n, int bits)
|
||||
{
|
||||
unsigned long first, last;
|
||||
|
||||
if (!n)
|
||||
return;
|
||||
|
||||
first = FB_SHIFT_HIGH(~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
|
||||
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
|
||||
|
||||
if (dst_idx+n <= bits) {
|
||||
/* Single word */
|
||||
@ -132,8 +132,8 @@ bitfill_unaligned(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
* Aligned pattern invert using 32/64-bit memory accesses
|
||||
*/
|
||||
static void
|
||||
bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
unsigned n, int bits)
|
||||
bitfill_aligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
|
||||
unsigned long pat, unsigned n, int bits)
|
||||
{
|
||||
unsigned long val = pat;
|
||||
unsigned long first, last;
|
||||
@ -141,8 +141,8 @@ bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
if (!n)
|
||||
return;
|
||||
|
||||
first = FB_SHIFT_HIGH(~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
|
||||
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
|
||||
|
||||
if (dst_idx+n <= bits) {
|
||||
/* Single word */
|
||||
@ -188,16 +188,17 @@ bitfill_aligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
*/
|
||||
|
||||
static void
|
||||
bitfill_unaligned_rev(unsigned long *dst, int dst_idx, unsigned long pat,
|
||||
int left, int right, unsigned n, int bits)
|
||||
bitfill_unaligned_rev(struct fb_info *p, unsigned long *dst, int dst_idx,
|
||||
unsigned long pat, int left, int right, unsigned n,
|
||||
int bits)
|
||||
{
|
||||
unsigned long first, last;
|
||||
|
||||
if (!n)
|
||||
return;
|
||||
|
||||
first = FB_SHIFT_HIGH(~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(~0UL, (dst_idx+n) % bits));
|
||||
first = FB_SHIFT_HIGH(p, ~0UL, dst_idx);
|
||||
last = ~(FB_SHIFT_HIGH(p, ~0UL, (dst_idx+n) % bits));
|
||||
|
||||
if (dst_idx+n <= bits) {
|
||||
/* Single word */
|
||||
@ -267,9 +268,9 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
|
||||
if (p->fbops->fb_sync)
|
||||
p->fbops->fb_sync(p);
|
||||
if (!left) {
|
||||
void (*fill_op32)(unsigned long *dst, int dst_idx,
|
||||
unsigned long pat, unsigned n, int bits) =
|
||||
NULL;
|
||||
void (*fill_op32)(struct fb_info *p, unsigned long *dst,
|
||||
int dst_idx, unsigned long pat, unsigned n,
|
||||
int bits) = NULL;
|
||||
|
||||
switch (rect->rop) {
|
||||
case ROP_XOR:
|
||||
@ -287,16 +288,16 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
|
||||
while (height--) {
|
||||
dst += dst_idx >> (ffs(bits) - 1);
|
||||
dst_idx &= (bits - 1);
|
||||
fill_op32(dst, dst_idx, pat, width*bpp, bits);
|
||||
fill_op32(p, dst, dst_idx, pat, width*bpp, bits);
|
||||
dst_idx += p->fix.line_length*8;
|
||||
}
|
||||
} else {
|
||||
int right;
|
||||
int r;
|
||||
int rot = (left-dst_idx) % bpp;
|
||||
void (*fill_op)(unsigned long *dst, int dst_idx,
|
||||
unsigned long pat, int left, int right,
|
||||
unsigned n, int bits) = NULL;
|
||||
void (*fill_op)(struct fb_info *p, unsigned long *dst,
|
||||
int dst_idx, unsigned long pat, int left,
|
||||
int right, unsigned n, int bits) = NULL;
|
||||
|
||||
/* rotate pattern to correct start position */
|
||||
pat = pat << rot | pat >> (bpp-rot);
|
||||
@ -318,7 +319,7 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
|
||||
while (height--) {
|
||||
dst += dst_idx >> (ffs(bits) - 1);
|
||||
dst_idx &= (bits - 1);
|
||||
fill_op(dst, dst_idx, pat, left, right,
|
||||
fill_op(p, dst, dst_idx, pat, left, right,
|
||||
width*bpp, bits);
|
||||
r = (p->fix.line_length*8) % bpp;
|
||||
pat = pat << (bpp-r) | pat >> r;
|
||||
|
||||
@ -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:
|
||||
|
||||
@ -791,6 +791,17 @@ struct fb_tile_ops {
|
||||
*/
|
||||
#define FBINFO_MISC_ALWAYS_SETPAR 0x40000
|
||||
|
||||
/*
|
||||
* Host and GPU endianness differ.
|
||||
*/
|
||||
#define FBINFO_FOREIGN_ENDIAN 0x100000
|
||||
/*
|
||||
* Big endian math. This is the same flags as above, but with different
|
||||
* meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
|
||||
* and host endianness. Drivers should not use this flag.
|
||||
*/
|
||||
#define FBINFO_BE_MATH 0x100000
|
||||
|
||||
struct fb_info {
|
||||
int node;
|
||||
int flags;
|
||||
@ -899,15 +910,11 @@ struct fb_info {
|
||||
|
||||
#endif
|
||||
|
||||
#if defined (__BIG_ENDIAN)
|
||||
#define FB_LEFT_POS(bpp) (32 - bpp)
|
||||
#define FB_SHIFT_HIGH(val, bits) ((val) >> (bits))
|
||||
#define FB_SHIFT_LOW(val, bits) ((val) << (bits))
|
||||
#else
|
||||
#define FB_LEFT_POS(bpp) (0)
|
||||
#define FB_SHIFT_HIGH(val, bits) ((val) << (bits))
|
||||
#define FB_SHIFT_LOW(val, bits) ((val) >> (bits))
|
||||
#endif
|
||||
#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
|
||||
#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
|
||||
(val) << (bits))
|
||||
#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
|
||||
(val) >> (bits))
|
||||
|
||||
/*
|
||||
* `Generic' versions of the frame buffer device operations
|
||||
@ -970,6 +977,25 @@ extern void fb_deferred_io_cleanup(struct fb_info *info);
|
||||
extern int fb_deferred_io_fsync(struct file *file, struct dentry *dentry,
|
||||
int datasync);
|
||||
|
||||
static inline bool fb_be_math(struct fb_info *info)
|
||||
{
|
||||
#ifdef CONFIG_FB_FOREIGN_ENDIAN
|
||||
#if defined(CONFIG_FB_BOTH_ENDIAN)
|
||||
return info->flags & FBINFO_BE_MATH;
|
||||
#elif defined(CONFIG_FB_BIG_ENDIAN)
|
||||
return true;
|
||||
#elif defined(CONFIG_FB_LITTLE_ENDIAN)
|
||||
return false;
|
||||
#endif /* CONFIG_FB_BOTH_ENDIAN */
|
||||
#else
|
||||
#ifdef __BIG_ENDIAN
|
||||
return true;
|
||||
#else
|
||||
return false;
|
||||
#endif /* __BIG_ENDIAN */
|
||||
#endif /* CONFIG_FB_FOREIGN_ENDIAN */
|
||||
}
|
||||
|
||||
/* drivers/video/fbsysfs.c */
|
||||
extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
|
||||
extern void framebuffer_release(struct fb_info *info);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user