On Fri, 23 Sep 2016, Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
> Turns out assuming that only stuff in uabi is uabi is a bit naive, and
> we have a bunch of properties for which the enum values are placed in
> random headers. A proper fix would be to split out uapi include
> headers, but meanwhile sprinkle at least some warning over them.
>
> Fixes: 532b36712ddf ("drm/doc: Polish for drm_plane.[hc]")
> Cc: Archit Taneja <architt@xxxxxxxxxxxxxx>
> Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> include/drm/drm_blend.h | 3 +++
> include/drm/drm_plane.h | 19 +++++++++++--------
> 2 files changed, 14 insertions(+), 8 deletions(-)
>
> diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h
> index 868f0364e939..36baa175de99 100644
> --- a/include/drm/drm_blend.h
> +++ b/include/drm/drm_blend.h
> @@ -33,6 +33,9 @@ struct drm_atomic_state;
> * Rotation property bits. DRM_ROTATE_<degrees> rotates the image by the
> * specified amount in degrees in counter clockwise direction. DRM_REFLECT_X and
> * DRM_REFLECT_Y reflects the image along the specified axis prior to rotation
> + *
> + * WARNING: These defines are UABI since they're exposed in the rotation
> + * property.
> */
> #define DRM_ROTATE_0 BIT(0)
> #define DRM_ROTATE_90 BIT(1)
> diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
> index 256219bfd07b..43cf193e54d6 100644
> --- a/include/drm/drm_plane.h
> +++ b/include/drm/drm_plane.h
> @@ -333,9 +333,20 @@ struct drm_plane_funcs {
> * DRM_CLIENT_CAP_UNIVERSAL_PLANES client capability bit to indicate that they
> * wish to receive a universal plane list containing all plane types. See also
> * drm_for_each_legacy_plane().
> + *
> + * WARNING: The values of this enum is UABI since they're exposed in the "type"
> + * property.
> */
> enum drm_plane_type {
> /**
> + * @DRM_PLANE_TYPE_OVERLAY:
> + *
> + * Overlay planes represent all non-primary, non-cursor planes. Some
> + * drivers refer to these types of planes as "sprites" internally.
> + */
> + DRM_PLANE_TYPE_OVERLAY,
> +
> + /**
> * @DRM_PLANE_TYPE_PRIMARY:
> *
> * Primary planes represent a "main" plane for a CRTC. Primary planes
> @@ -353,14 +364,6 @@ enum drm_plane_type {
> * DRM_IOCTL_MODE_CURSOR2 IOCTLs.
> */
> DRM_PLANE_TYPE_CURSOR,
> -
> - /**
> - * @DRM_PLANE_TYPE_OVERLAY:
> - *
> - * Overlay planes represent all non-primary, non-cursor planes. Some
> - * drivers refer to these types of planes as "sprites" internally.
> - */
> - DRM_PLANE_TYPE_OVERLAY,
> };
--
Jani Nikula, Intel Open Source Technology Center
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