diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2011-12-20 00:33:24 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-12-20 20:34:32 +0000 |
| commit | d0d110e096298d2715aa26b3698e604e0d4a2fb9 (patch) | |
| tree | 5ea4b13f7fcb28940a9c1f5d4ffa28188ebc4704 /drivers/gpu/drm/drm_crtc_helper.c | |
| parent | c75488376a55c207172f78664d600b87df88107f (diff) | |
drm: Add drm_format_num_planes() utility function
This function returns the number of planes used by a specific pixel
format.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rob Clark <rob.clark@linaro.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 0cd2ba19bad..84a4a809793 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -1015,3 +1015,36 @@ void drm_helper_hpd_irq_event(struct drm_device *dev) queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); } EXPORT_SYMBOL(drm_helper_hpd_irq_event); + + +/** + * 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); |