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authorFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2010-03-10 15:21:38 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:33 -0800
commitbd140691bda491b417a6d1e81b03416b54cb8d8d (patch)
treef19f8fcd1acd4b6ae60ed4ba261e9106f3452793 /drivers/video
parentdba77f8409eb861b28d295211776d953a8255ec7 (diff)
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>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/via/hw.c30
-rw-r--r--drivers/video/via/viafbdev.c61
2 files changed, 56 insertions, 35 deletions
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c
index ed8d78a35b2..47d9024d7c3 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);
diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index bb0f616b7d4..bd8db75236a 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -60,6 +60,47 @@ static int viafb_pan_display(struct fb_var_screeninfo *var,
static struct fb_ops viafb_ops;
+static void viafb_fill_var_color_info(struct fb_var_screeninfo *var, u8 depth)
+{
+ var->grayscale = 0;
+ var->red.msb_right = 0;
+ var->green.msb_right = 0;
+ var->blue.msb_right = 0;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ var->transp.msb_right = 0;
+ var->nonstd = 0;
+ switch (depth) {
+ case 8:
+ var->bits_per_pixel = 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->bits_per_pixel = 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 24:
+ var->bits_per_pixel = 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;
+ }
+}
+
static void viafb_update_fix(struct fb_info *info)
{
u32 bpp = info->var.bits_per_pixel;
@@ -81,6 +122,7 @@ static void viafb_setup_fixinfo(struct fb_fix_screeninfo *fix,
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
+ fix->visual = FB_VISUAL_TRUECOLOR;
fix->xpanstep = fix->ywrapstep = 0;
fix->ypanstep = 1;
@@ -103,7 +145,7 @@ static int viafb_release(struct fb_info *info, int user)
static int viafb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
- int htotal, vtotal;
+ int htotal, vtotal, depth;
struct VideoModeTable *vmode_entry;
struct viafb_par *ppar = info->par;
u32 long_refresh;
@@ -122,13 +164,22 @@ static int viafb_check_var(struct fb_var_screeninfo *var,
return -EINVAL;
}
- if (24 == var->bits_per_pixel)
- var->bits_per_pixel = 32;
+ depth = fb_get_color_depth(var, &info->fix);
+ if (!depth)
+ depth = var->bits_per_pixel;
- if (var->bits_per_pixel != 8 && var->bits_per_pixel != 16 &&
- var->bits_per_pixel != 32)
+ if (depth < 0 || depth > 32)
return -EINVAL;
+ else if (!depth)
+ depth = 24;
+ else if (depth <= 8)
+ depth = 8;
+ else if (depth <= 16)
+ depth = 16;
+ else
+ depth = 24;
+ viafb_fill_var_color_info(var, depth);
if ((var->xres_virtual * (var->bits_per_pixel >> 3)) & 0x1F)
/*32 pixel alignment */
var->xres_virtual = (var->xres_virtual + 31) & ~31;