On Wed, Oct 14, 2015 at 07:28:53PM +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Add a few helpers to get the dimensions of the chroma plane(s).
>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> include/drm/drm_crtc.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 33ddedd..317baf9 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1497,6 +1497,18 @@ extern int drm_format_num_planes(uint32_t format);
> extern int drm_format_plane_cpp(uint32_t format, int plane);
> extern int drm_format_horz_chroma_subsampling(uint32_t format);
> extern int drm_format_vert_chroma_subsampling(uint32_t format);
> +static inline int drm_format_plane_width(int width, uint32_t format, int plane)
> +{
> + if (plane == 0)
> + return width;
> + return width / drm_format_horz_chroma_subsampling(format);
> +}
> +static inline int drm_format_plane_height(int height, uint32_t format, int plane)
> +{
> + if (plane == 0)
> + return height;
> + return height / drm_format_vert_chroma_subsampling(format);
> +}
A bit of kerneldoc would be neat. Either way Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> extern const char *drm_get_format_name(uint32_t format);
> extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
> unsigned int supported_rotations);
> --
> 2.4.9
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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