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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2011-12-13 14:02:26 +0100 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2011-12-19 20:07:13 +0000 |
| commit | fb21c2f42879c05c76ea9e249b6905fc729f8529 (patch) | |
| tree | 93c4581f4f2947dae8ebd36eae0cf86f38ec93d3 /drivers/video/fbmem.c | |
| parent | b779505282590289546aab9ffead4490fe195d40 (diff) | |
| download | lwn-fb21c2f42879c05c76ea9e249b6905fc729f8529.tar.gz lwn-fb21c2f42879c05c76ea9e249b6905fc729f8529.zip | |
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.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index ad936295d8f4..ac9141b85356 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; |