diff options
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 45 | ||||
| -rw-r--r-- | include/drm/drm_crtc.h | 1 |
2 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 32ab669f4ae..2c4e9cf2a1d 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); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 9dd3ed85547..2d128eb4293 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1027,5 +1027,6 @@ extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, int *bpp); extern int drm_format_num_planes(uint32_t format); +extern int drm_format_plane_cpp(uint32_t format, int plane); #endif /* __DRM_CRTC_H__ */ |