diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index d3aaeb6ae236..32ab669f4aed 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -3466,3 +3466,35 @@ void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, } } EXPORT_SYMBOL(drm_fb_get_bpp_depth); + +/** + * drm_format_num_planes - get the number of planes for format + * @format: pixel format (DRM_FORMAT_*) + * + * RETURNS: + * The number of planes used by the specified pixel format. + */ +int drm_format_num_planes(uint32_t format) +{ + switch (format) { + 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 3; + case DRM_FORMAT_NV12: + case DRM_FORMAT_NV21: + case DRM_FORMAT_NV16: + case DRM_FORMAT_NV61: + return 2; + default: + return 1; + } +} +EXPORT_SYMBOL(drm_format_num_planes); |