| Message ID | 5373772D.9060807@fr.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
At Wed, 14 May 2014 16:01:17 +0200, Cedric Le Goater wrote: > > Hi Iwai-san, > > On 05/14/2014 03:21 PM, Takashi Iwai wrote: > > Although the color palette was corrected for little endian by the > > commit [e1edf18b: offb: Add palette hack for little endian], the > > graphics mode is still shown in psychedelic colors. > > Are you referring to the linux logo colors ? If so, could you please > try the patch below, it should be a fix. Not only penguin logo but the whole X graphics got strange colors, too, according to the bug report. I put the original reporter/tester (Dinar Valeev) to Cc. I'm merely a person who tries to fix this mess ;) BTW, did you try to run X on fbdev? > > For fixing this > > properly, we rather need to correct the RGB offsets depending on > > endianess. > > > > Since the RGB base offsets are corrected, we don't need the hack for > > pallette color entries. This patch reverts that, too. > > Are you testing using qemu -vga std -vnc :x ? If so, did you try changing > the depth to 8,15,16,32 ? Yes, it was with qemu -vga std -vnc :x. About different color depths, Dinar can test / clarify better, I suppose. > I think the patch might be breaking big endian > too. Big endian should work as is because my patch uses the original offsets when fb_be_math() is true. It corrects the RGB offsets if !fb_be_math(). But, I'm also entirely not sure whether this is 100% correct, either. Namely, if the RGB offsets were correct for some little endian machines with offb, my patch would break it, of course. But, then your previous fix must have already broken it as well, so I took the same fb_be_math() check. thanks, Takashi > Now, I am far from being an expert on frame buffers. It would be glad > to have some insights on that topic. > > Thanks, > > C. > > > [PATCH] fb: fix logo palette entries for little endian > > The offb_cmap_byteswap() routine helps byteswapping the color map > entries when required. This patch externalizes and renames the helper > routine to adjust the pseudo palette of the logo when running on > little endian. > > Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> > --- > drivers/video/fbmem.c | 6 ++++-- > drivers/video/offb.c | 11 +---------- > include/linux/fb.h | 8 ++++++++ > 3 files changed, 13 insertions(+), 12 deletions(-) > > Index: linux.git/drivers/video/fbmem.c > =================================================================== > --- linux.git.orig/drivers/video/fbmem.c > +++ linux.git/drivers/video/fbmem.c > @@ -252,7 +252,8 @@ static void fb_set_logo_truepalette(str > blueshift = info->var.blue.offset - (8 - info->var.blue.length); > > for ( i = 0; i < logo->clutsize; i++) { > - palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | > + palette[i+32] = fb_cmap_byteswap(info, > + safe_shift((clut[0] & redmask), redshift) | > safe_shift((clut[1] & greenmask), greenshift) | > safe_shift((clut[2] & bluemask), blueshift)); > clut += 3; > @@ -271,7 +272,8 @@ static void fb_set_logo_directpalette(st > blueshift = info->var.blue.offset; > > for (i = 32; i < 32 + logo->clutsize; i++) > - palette[i] = i << redshift | i << greenshift | i << blueshift; > + palette[i] = fb_cmap_byteswap(info, i << redshift | > + i << greenshift | i << blueshift); > } > > static void fb_set_logo(struct fb_info *info, > Index: linux.git/drivers/video/offb.c > =================================================================== > --- linux.git.orig/drivers/video/offb.c > +++ linux.git/drivers/video/offb.c > @@ -91,15 +91,6 @@ 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 > @@ -129,7 +120,7 @@ static int offb_setcolreg(u_int regno, u > mask <<= info->var.transp.offset; > value |= mask; > } > - pal[regno] = offb_cmap_byteswap(info, value); > + pal[regno] = fb_cmap_byteswap(info, value); > return 0; > } > > Index: linux.git/include/linux/fb.h > =================================================================== > --- linux.git.orig/include/linux/fb.h > +++ linux.git/include/linux/fb.h > @@ -582,6 +582,7 @@ static inline struct apertures_struct *a > > #endif > > +#define FB_RIGHT_POS(p, bpp) (fb_be_math(p) ? 0 : (32 - (bpp))) > #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)) > @@ -681,6 +682,13 @@ static inline bool fb_be_math(struct fb_ > #endif /* CONFIG_FB_FOREIGN_ENDIAN */ > } > > +static inline u32 fb_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); > +} > + > /* drivers/video/fbsysfs.c */ > extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); > extern void framebuffer_release(struct fb_info *info); > -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, May 14, 2014 at 4:01 PM, Cedric Le Goater <clg@fr.ibm.com> wrote: > --- linux.git.orig/drivers/video/fbmem.c > +++ linux.git/drivers/video/fbmem.c > @@ -252,7 +252,8 @@ static void fb_set_logo_truepalette(str > blueshift = info->var.blue.offset - (8 - info->var.blue.length); > > for ( i = 0; i < logo->clutsize; i++) { > - palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | > + palette[i+32] = fb_cmap_byteswap(info, > + safe_shift((clut[0] & redmask), redshift) | > safe_shift((clut[1] & greenmask), greenshift) | > safe_shift((clut[2] & bluemask), blueshift)); > clut += 3; > @@ -271,7 +272,8 @@ static void fb_set_logo_directpalette(st > blueshift = info->var.blue.offset; > > for (i = 32; i < 32 + logo->clutsize; i++) > - palette[i] = i << redshift | i << greenshift | i << blueshift; > + palette[i] = fb_cmap_byteswap(info, i << redshift | > + i << greenshift | i << blueshift); I find it very strange you have to touch the generic code in such a way... Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 05/14/2014 04:24 PM, Takashi Iwai wrote: > At Wed, 14 May 2014 16:01:17 +0200, > Cedric Le Goater wrote: >> >> Hi Iwai-san, >> >> On 05/14/2014 03:21 PM, Takashi Iwai wrote: >>> Although the color palette was corrected for little endian by the >>> commit [e1edf18b: offb: Add palette hack for little endian], the >>> graphics mode is still shown in psychedelic colors. >> >> Are you referring to the linux logo colors ? If so, could you please >> try the patch below, it should be a fix. > > Not only penguin logo but the whole X graphics got strange colors, > too, according to the bug report. I put the original reporter/tester > (Dinar Valeev) to Cc. > I'm merely a person who tries to fix this mess ;) > > BTW, did you try to run X on fbdev? Not at the time, I was working on the console only, BE and LE. I just tried fbdev and indeed this is a psychedelic mess :) Your fix has also issues on BE and console and the patch of mine below is of no use for fbdev. Damn, this is a nightmare. C. >>> For fixing this >>> properly, we rather need to correct the RGB offsets depending on >>> endianess. >>> >>> Since the RGB base offsets are corrected, we don't need the hack for >>> pallette color entries. This patch reverts that, too. >> >> Are you testing using qemu -vga std -vnc :x ? If so, did you try changing >> the depth to 8,15,16,32 ? > > Yes, it was with qemu -vga std -vnc :x. > About different color depths, Dinar can test / clarify better, I > suppose. > >> I think the patch might be breaking big endian >> too. > > Big endian should work as is because my patch uses the original > offsets when fb_be_math() is true. It corrects the RGB offsets if > !fb_be_math(). > > But, I'm also entirely not sure whether this is 100% correct, either. > Namely, if the RGB offsets were correct for some little endian > machines with offb, my patch would break it, of course. But, then > your previous fix must have already broken it as well, so I took the > same fb_be_math() check. > > > thanks, > > Takashi > >> Now, I am far from being an expert on frame buffers. It would be glad >> to have some insights on that topic. >> >> Thanks, >> >> C. >> >> >> [PATCH] fb: fix logo palette entries for little endian >> >> The offb_cmap_byteswap() routine helps byteswapping the color map >> entries when required. This patch externalizes and renames the helper >> routine to adjust the pseudo palette of the logo when running on >> little endian. >> >> Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> >> --- >> drivers/video/fbmem.c | 6 ++++-- >> drivers/video/offb.c | 11 +---------- >> include/linux/fb.h | 8 ++++++++ >> 3 files changed, 13 insertions(+), 12 deletions(-) >> >> Index: linux.git/drivers/video/fbmem.c >> =================================================================== >> --- linux.git.orig/drivers/video/fbmem.c >> +++ linux.git/drivers/video/fbmem.c >> @@ -252,7 +252,8 @@ static void fb_set_logo_truepalette(str >> blueshift = info->var.blue.offset - (8 - info->var.blue.length); >> >> for ( i = 0; i < logo->clutsize; i++) { >> - palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | >> + palette[i+32] = fb_cmap_byteswap(info, >> + safe_shift((clut[0] & redmask), redshift) | >> safe_shift((clut[1] & greenmask), greenshift) | >> safe_shift((clut[2] & bluemask), blueshift)); >> clut += 3; >> @@ -271,7 +272,8 @@ static void fb_set_logo_directpalette(st >> blueshift = info->var.blue.offset; >> >> for (i = 32; i < 32 + logo->clutsize; i++) >> - palette[i] = i << redshift | i << greenshift | i << blueshift; >> + palette[i] = fb_cmap_byteswap(info, i << redshift | >> + i << greenshift | i << blueshift); >> } >> >> static void fb_set_logo(struct fb_info *info, >> Index: linux.git/drivers/video/offb.c >> =================================================================== >> --- linux.git.orig/drivers/video/offb.c >> +++ linux.git/drivers/video/offb.c >> @@ -91,15 +91,6 @@ 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 >> @@ -129,7 +120,7 @@ static int offb_setcolreg(u_int regno, u >> mask <<= info->var.transp.offset; >> value |= mask; >> } >> - pal[regno] = offb_cmap_byteswap(info, value); >> + pal[regno] = fb_cmap_byteswap(info, value); >> return 0; >> } >> >> Index: linux.git/include/linux/fb.h >> =================================================================== >> --- linux.git.orig/include/linux/fb.h >> +++ linux.git/include/linux/fb.h >> @@ -582,6 +582,7 @@ static inline struct apertures_struct *a >> >> #endif >> >> +#define FB_RIGHT_POS(p, bpp) (fb_be_math(p) ? 0 : (32 - (bpp))) >> #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)) >> @@ -681,6 +682,13 @@ static inline bool fb_be_math(struct fb_ >> #endif /* CONFIG_FB_FOREIGN_ENDIAN */ >> } >> >> +static inline u32 fb_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); >> +} >> + >> /* drivers/video/fbsysfs.c */ >> extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); >> extern void framebuffer_release(struct fb_info *info); >> > -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
At Wed, 14 May 2014 19:04:00 +0200, Cedric Le Goater wrote: > > On 05/14/2014 04:24 PM, Takashi Iwai wrote: > > At Wed, 14 May 2014 16:01:17 +0200, > > Cedric Le Goater wrote: > >> > >> Hi Iwai-san, > >> > >> On 05/14/2014 03:21 PM, Takashi Iwai wrote: > >>> Although the color palette was corrected for little endian by the > >>> commit [e1edf18b: offb: Add palette hack for little endian], the > >>> graphics mode is still shown in psychedelic colors. > >> > >> Are you referring to the linux logo colors ? If so, could you please > >> try the patch below, it should be a fix. > > > > Not only penguin logo but the whole X graphics got strange colors, > > too, according to the bug report. I put the original reporter/tester > > (Dinar Valeev) to Cc. > > I'm merely a person who tries to fix this mess ;) > > > > BTW, did you try to run X on fbdev? > > Not at the time, I was working on the console only, BE and LE. > I just tried fbdev and indeed this is a psychedelic mess :) > > Your fix has also issues on BE and console and the patch of mine > below is of no use for fbdev. Damn, this is a nightmare. Hm, so it actually regressed on BE? It's strange because fb_math_be() should be true and the patch won't change the values in that case... Takashi > > C. > > >>> For fixing this > >>> properly, we rather need to correct the RGB offsets depending on > >>> endianess. > >>> > >>> Since the RGB base offsets are corrected, we don't need the hack for > >>> pallette color entries. This patch reverts that, too. > >> > >> Are you testing using qemu -vga std -vnc :x ? If so, did you try changing > >> the depth to 8,15,16,32 ? > > > > Yes, it was with qemu -vga std -vnc :x. > > About different color depths, Dinar can test / clarify better, I > > suppose. > > > >> I think the patch might be breaking big endian > >> too. > > > > Big endian should work as is because my patch uses the original > > offsets when fb_be_math() is true. It corrects the RGB offsets if > > !fb_be_math(). > > > > But, I'm also entirely not sure whether this is 100% correct, either. > > Namely, if the RGB offsets were correct for some little endian > > machines with offb, my patch would break it, of course. But, then > > your previous fix must have already broken it as well, so I took the > > same fb_be_math() check. > > > > > > thanks, > > > > Takashi > > > >> Now, I am far from being an expert on frame buffers. It would be glad > >> to have some insights on that topic. > >> > >> Thanks, > >> > >> C. > >> > >> > >> [PATCH] fb: fix logo palette entries for little endian > >> > >> The offb_cmap_byteswap() routine helps byteswapping the color map > >> entries when required. This patch externalizes and renames the helper > >> routine to adjust the pseudo palette of the logo when running on > >> little endian. > >> > >> Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> > >> --- > >> drivers/video/fbmem.c | 6 ++++-- > >> drivers/video/offb.c | 11 +---------- > >> include/linux/fb.h | 8 ++++++++ > >> 3 files changed, 13 insertions(+), 12 deletions(-) > >> > >> Index: linux.git/drivers/video/fbmem.c > >> =================================================================== > >> --- linux.git.orig/drivers/video/fbmem.c > >> +++ linux.git/drivers/video/fbmem.c > >> @@ -252,7 +252,8 @@ static void fb_set_logo_truepalette(str > >> blueshift = info->var.blue.offset - (8 - info->var.blue.length); > >> > >> for ( i = 0; i < logo->clutsize; i++) { > >> - palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | > >> + palette[i+32] = fb_cmap_byteswap(info, > >> + safe_shift((clut[0] & redmask), redshift) | > >> safe_shift((clut[1] & greenmask), greenshift) | > >> safe_shift((clut[2] & bluemask), blueshift)); > >> clut += 3; > >> @@ -271,7 +272,8 @@ static void fb_set_logo_directpalette(st > >> blueshift = info->var.blue.offset; > >> > >> for (i = 32; i < 32 + logo->clutsize; i++) > >> - palette[i] = i << redshift | i << greenshift | i << blueshift; > >> + palette[i] = fb_cmap_byteswap(info, i << redshift | > >> + i << greenshift | i << blueshift); > >> } > >> > >> static void fb_set_logo(struct fb_info *info, > >> Index: linux.git/drivers/video/offb.c > >> =================================================================== > >> --- linux.git.orig/drivers/video/offb.c > >> +++ linux.git/drivers/video/offb.c > >> @@ -91,15 +91,6 @@ 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 > >> @@ -129,7 +120,7 @@ static int offb_setcolreg(u_int regno, u > >> mask <<= info->var.transp.offset; > >> value |= mask; > >> } > >> - pal[regno] = offb_cmap_byteswap(info, value); > >> + pal[regno] = fb_cmap_byteswap(info, value); > >> return 0; > >> } > >> > >> Index: linux.git/include/linux/fb.h > >> =================================================================== > >> --- linux.git.orig/include/linux/fb.h > >> +++ linux.git/include/linux/fb.h > >> @@ -582,6 +582,7 @@ static inline struct apertures_struct *a > >> > >> #endif > >> > >> +#define FB_RIGHT_POS(p, bpp) (fb_be_math(p) ? 0 : (32 - (bpp))) > >> #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)) > >> @@ -681,6 +682,13 @@ static inline bool fb_be_math(struct fb_ > >> #endif /* CONFIG_FB_FOREIGN_ENDIAN */ > >> } > >> > >> +static inline u32 fb_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); > >> +} > >> + > >> /* drivers/video/fbsysfs.c */ > >> extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); > >> extern void framebuffer_release(struct fb_info *info); > >> > > > -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, 2014-05-14 at 19:57 +0200, Takashi Iwai wrote: > > Hm, so it actually regressed on BE? > > It's strange because fb_math_be() should be true and the patch won't > change the values in that case... Shouldn't the patch be based on foreign endian being set rather than just "be" anyway ? IE. If the fb is LE and the host is LE we *also* don't want to change the ordering, which will be the case when we fix qemu... Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, 2014-05-14 at 19:57 +0200, Takashi Iwai wrote: > > Hm, so it actually regressed on BE? > > It's strange because fb_math_be() should be true and the patch won't > change the values in that case... Shouldn't the patch be based on foreign endian being set rather than just "be" anyway ? IE. If the fb is LE and the host is LE we *also* don't want to change the ordering, which will be the case when we fix qemu... Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Index: linux.git/drivers/video/fbmem.c =================================================================== --- linux.git.orig/drivers/video/fbmem.c +++ linux.git/drivers/video/fbmem.c @@ -252,7 +252,8 @@ static void fb_set_logo_truepalette(str blueshift = info->var.blue.offset - (8 - info->var.blue.length); for ( i = 0; i < logo->clutsize; i++) { - palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | + palette[i+32] = fb_cmap_byteswap(info, + safe_shift((clut[0] & redmask), redshift) | safe_shift((clut[1] & greenmask), greenshift) | safe_shift((clut[2] & bluemask), blueshift)); clut += 3; @@ -271,7 +272,8 @@ static void fb_set_logo_directpalette(st blueshift = info->var.blue.offset; for (i = 32; i < 32 + logo->clutsize; i++) - palette[i] = i << redshift | i << greenshift | i << blueshift; + palette[i] = fb_cmap_byteswap(info, i << redshift | + i << greenshift | i << blueshift); } static void fb_set_logo(struct fb_info *info, Index: linux.git/drivers/video/offb.c =================================================================== --- linux.git.orig/drivers/video/offb.c +++ linux.git/drivers/video/offb.c @@ -91,15 +91,6 @@ 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 @@ -129,7 +120,7 @@ static int offb_setcolreg(u_int regno, u mask <<= info->var.transp.offset; value |= mask; } - pal[regno] = offb_cmap_byteswap(info, value); + pal[regno] = fb_cmap_byteswap(info, value); return 0; } Index: linux.git/include/linux/fb.h =================================================================== --- linux.git.orig/include/linux/fb.h +++ linux.git/include/linux/fb.h @@ -582,6 +582,7 @@ static inline struct apertures_struct *a #endif +#define FB_RIGHT_POS(p, bpp) (fb_be_math(p) ? 0 : (32 - (bpp))) #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)) @@ -681,6 +682,13 @@ static inline bool fb_be_math(struct fb_ #endif /* CONFIG_FB_FOREIGN_ENDIAN */ } +static inline u32 fb_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); +} + /* drivers/video/fbsysfs.c */ extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev); extern void framebuffer_release(struct fb_info *info);