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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2011-12-13 14:02:26 +0100
committerFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2011-12-19 20:07:13 +0000
commitfb21c2f42879c05c76ea9e249b6905fc729f8529 (patch)
tree93c4581f4f2947dae8ebd36eae0cf86f38ec93d3 /drivers/video/fbmem.c
parentb779505282590289546aab9ffead4490fe195d40 (diff)
downloadop-kernel-dev-fb21c2f42879c05c76ea9e249b6905fc729f8529.zip
op-kernel-dev-fb21c2f42879c05c76ea9e249b6905fc729f8529.tar.gz
fbdev: Add FOURCC-based format configuration API
This API will be used to support YUV frame buffer formats in a standard way. Last but not least, create a much needed fbdev API documentation and document the format setting APIs. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/fbmem.c')
-rw-r--r--drivers/video/fbmem.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index ad93629..ac9141b 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -967,6 +967,20 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
u32 activate = var->activate;
+ /* When using FOURCC mode, make sure the red, green, blue and
+ * transp fields are set to 0.
+ */
+ if ((info->fix.capabilities & FB_CAP_FOURCC) &&
+ var->grayscale > 1) {
+ if (var->red.offset || var->green.offset ||
+ var->blue.offset || var->transp.offset ||
+ var->red.length || var->green.length ||
+ var->blue.length || var->transp.length ||
+ var->red.msb_right || var->green.msb_right ||
+ var->blue.msb_right || var->transp.msb_right)
+ return -EINVAL;
+ }
+
if (!info->fbops->fb_check_var) {
*var = info->var;
goto done;
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