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drm/radeon: Endianness fixes for radeondrmfb. 

For now handle it via r/g/b offsets and disallow 16 bpp modes on big endian
machines.

Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Michel Dänzer 2009-06-24 00:12:55 +10:00 committed by Dave Airlie
parent 77bd36f014
commit 61b576dbbe
1 changed files with 50 additions and 3 deletions
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53
drivers/gpu/drm/radeon/radeon_fb.c
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@ -101,9 +101,10 @@ static int radeonfb_setcolreg(unsigned regno,
break;
case 24:
case 32:
fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
(green & 0xff00) |
((blue & 0xff00) >> 8);
fb->pseudo_palette[regno] =
(((red >> 8) & 0xff) << info->var.red.offset) |
(((green >> 8) & 0xff) << info->var.green.offset) |
(((blue >> 8) & 0xff) << info->var.blue.offset);
break;
}
}
@ -154,6 +155,7 @@ static int radeonfb_check_var(struct fb_var_screeninfo *var,
var->transp.length = 0;
var->transp.offset = 0;
break;
#ifdef __LITTLE_ENDIAN
case 15:
var->red.offset = 10;
var->green.offset = 5;
@ -194,6 +196,28 @@ static int radeonfb_check_var(struct fb_var_screeninfo *var,
var->transp.length = 8;
var->transp.offset = 24;
break;
#else
case 24:
var->red.offset = 8;
var->green.offset = 16;
var->blue.offset = 24;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 0;
var->transp.offset = 0;
break;
case 32:
var->red.offset = 8;
var->green.offset = 16;
var->blue.offset = 24;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 8;
var->transp.offset = 0;
break;
#endif
default:
return -EINVAL;
}
@ -600,6 +624,7 @@ int radeonfb_create(struct radeon_device *rdev,
info->var.transp.offset = 0;
info->var.transp.length = 0;
break;
#ifdef __LITTLE_ENDIAN
case 15:
info->var.red.offset = 10;
info->var.green.offset = 5;
@ -639,7 +664,29 @@ int radeonfb_create(struct radeon_device *rdev,
info->var.transp.offset = 24;
info->var.transp.length = 8;
break;
#else
case 24:
info->var.red.offset = 8;
info->var.green.offset = 16;
info->var.blue.offset = 24;
info->var.red.length = 8;
info->var.green.length = 8;
info->var.blue.length = 8;
info->var.transp.offset = 0;
info->var.transp.length = 0;
break;
case 32:
info->var.red.offset = 8;
info->var.green.offset = 16;
info->var.blue.offset = 24;
info->var.red.length = 8;
info->var.green.length = 8;
info->var.blue.length = 8;
info->var.transp.offset = 0;
info->var.transp.length = 8;
break;
default:
#endif
break;
}