[PATCH libdrm v2] Header: Add rotation property fields

[Kristian Høgsberg]

On Mon, Apr 17, 2017 at 1:13 PM, Robert Foss <robert.foss at collabora.com> wrote:
> From: Sean Paul <seanpaul at chromium.org>
>
> From drm_crtc.h, for use with the plane "rotation" property.
>
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> Signed-off-by: Robert Foss <robert.foss at collabora.com>
> Reviewed-by: Sumit Semwal <sumit.semwal at linaro.org>
> ---
> Changes since v1:
>  - Added r-b
>
>  include/drm/drm.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/include/drm/drm.h b/include/drm/drm.h
> index 1e7a4bc7a505..656c90045161 100644
> --- a/include/drm/drm.h
> +++ b/include/drm/drm.h
> @@ -74,6 +74,14 @@ extern "C" {
>  #define _DRM_LOCK_IS_CONT(lock)           ((lock) & _DRM_LOCK_CONT)
>  #define _DRM_LOCKING_CONTEXT(lock) ((lock) & ~(_DRM_LOCK_HELD|_DRM_LOCK_CONT))
>
> +/* Rotation property bits */
> +#define DRM_ROTATE_0           0
> +#define DRM_ROTATE_90          1
> +#define DRM_ROTATE_180         2
> +#define DRM_ROTATE_270         3
> +#define DRM_REFLECT_X          4
> +#define DRM_REFLECT_Y          5

As far as I understand the property mechanism, the numeric values
aren't actually ABI. The string names of the enum values are the ABI
and you're supposed to parse the enum info and discover the numerical
values. For example:
https://git.collabora.com/cgit/user/daniels/weston.git/tree/libweston/compositor-drm.c?h=wip/2017-03/atomic-v10-WIP#n570

Kristian

> +
>  typedef unsigned int drm_context_t;
>  typedef unsigned int drm_drawable_t;
>  typedef unsigned int drm_magic_t;
> --
> 2.11.0.453.g787f75f05
>
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