diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2012-04-05 22:35:16 +0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-04-20 15:37:32 +0400 |
| commit | 5a86bd552407bd6b3e0df4e88636797484d06430 (patch) | |
| tree | 1d8f6746b0381b599cb7e5c1afb0490a6a0d009f /drivers/gpu/drm/drm_crtc.c | |
| parent | 141670e9b4356b59b5b39a99e10ac0118d12b16d (diff) | |
| download | linux-5a86bd552407bd6b3e0df4e88636797484d06430.tar.xz | |
drm: Add drm_format_plane_cpp() utility function
This function returns the bytes per pixel value based on the pixel
format and plane index.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 32ab669f4aed..2c4e9cf2a1d2 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -3498,3 +3498,48 @@ int drm_format_num_planes(uint32_t format) } } EXPORT_SYMBOL(drm_format_num_planes); + +/** + * drm_format_plane_cpp - determine the bytes per pixel value + * @format: pixel format (DRM_FORMAT_*) + * @plane: plane index + * + * RETURNS: + * The bytes per pixel value for the specified plane. + */ +int drm_format_plane_cpp(uint32_t format, int plane) +{ + unsigned int depth; + int bpp; + + if (plane >= drm_format_num_planes(format)) + return 0; + + switch (format) { + case DRM_FORMAT_YUYV: + case DRM_FORMAT_YVYU: + case DRM_FORMAT_UYVY: + case DRM_FORMAT_VYUY: + return 2; + case DRM_FORMAT_NV12: + case DRM_FORMAT_NV21: + case DRM_FORMAT_NV16: + case DRM_FORMAT_NV61: + return plane ? 2 : 1; + case DRM_FORMAT_YUV410: + case DRM_FORMAT_YVU410: + case DRM_FORMAT_YUV411: + case DRM_FORMAT_YVU411: + case DRM_FORMAT_YUV420: + case DRM_FORMAT_YVU420: + case DRM_FORMAT_YUV422: + case DRM_FORMAT_YVU422: + case DRM_FORMAT_YUV444: + case DRM_FORMAT_YVU444: + return 1; + default: + drm_fb_get_bpp_depth(format, &depth, &bpp); + return bpp >> 3; + } +} +EXPORT_SYMBOL(drm_format_plane_cpp); |