viafb: rework color checking

Make color checking a bit more tolerant in what values it allows and more
fine grained to later support 15 and 30 bits formats.  It splits the
filling of the color information in var to a seperate function and sets
some color related values in var that where previously untouched.

This could be a bug fix but at least I don't know any applications that
was fooled by not correctly setting the fields in var.  At least no
regressions are expected.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 30 deletions

diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index ed8d78a35b29..47d9024d7c30 100644
--- a/drivers/video/via/hw.c
+++ b/drivers/video/via/hw.c
@@ -2622,36 +2622,6 @@ void viafb_fill_var_timing_info(struct fb_var_screeninfo *var, int refresh,
         }
 
         crt_reg = crt_timing[index].crtc;
-        switch (var->bits_per_pixel) {
-        case 8:
-                var->red.offset = 0;
-                var->green.offset = 0;
-                var->blue.offset = 0;
-                var->red.length = 6;
-                var->green.length = 6;
-                var->blue.length = 6;
-                break;
-        case 16:
-                var->red.offset = 11;
-                var->green.offset = 5;
-                var->blue.offset = 0;
-                var->red.length = 5;
-                var->green.length = 6;
-                var->blue.length = 5;
-                break;
-        case 32:
-                var->red.offset = 16;
-                var->green.offset = 8;
-                var->blue.offset = 0;
-                var->red.length = 8;
-                var->green.length = 8;
-                var->blue.length = 8;
-                break;
-        default:
-                /* never happed, put here to keep consistent */
-                break;
-        }
-
         var->pixclock = viafb_get_pixclock(var->xres, var->yres, refresh);
         var->left_margin =
             crt_reg.hor_total - (crt_reg.hor_sync_start + crt_reg.hor_sync_end);