diff options
| author | Lespiau, Damien <damien.lespiau@intel.com> | 2014-03-28 12:31:05 (GMT) |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-04-02 00:29:01 (GMT) |
| commit | bfe8b5738a5d99156d83dc298729552ce82309d5 (patch) | |
| tree | 79f38431ae3269b36ec213b9b2d1a643c7b85d1d | |
| parent | 05c63c2ff23a80b654d6c088ac3ba21628db0173 (diff) | |
| download | linux-bfe8b5738a5d99156d83dc298729552ce82309d5.tar.xz | |
drm: Specify a bit more the DRM_CAP_CURSOR_{WIDTH, HEIGHT} caps
Earlier this week, there was a bit of confusion about those new
capabilities, to the point I think it's better to document the intention
and API contract.
The comment documents the current situation:
- the radeon driver returns the only valid size for the hw
- i915 returns the maximun cursor size
- other drivers fall back to returning 64x64
The common contract is to return a valid cursor size.
Cc: Sagar Kamble <sagar.a.kamble@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | include/uapi/drm/drm.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index b06c8ed..ec6b259 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -619,6 +619,15 @@ struct drm_gem_open { #define DRM_PRIME_CAP_EXPORT 0x2 #define DRM_CAP_TIMESTAMP_MONOTONIC 0x6 #define DRM_CAP_ASYNC_PAGE_FLIP 0x7 +/* + * The CURSOR_WIDTH and CURSOR_HEIGHT capabilities return a valid widthxheight + * combination for the hardware cursor. The intention is that a hardware + * agnostic userspace can query a cursor plane size to use. + * + * Note that the cross-driver contract is to merely return a valid size; + * drivers are free to attach another meaning on top, eg. i915 returns the + * maximum plane size. + */ #define DRM_CAP_CURSOR_WIDTH 0x8 #define DRM_CAP_CURSOR_HEIGHT 0x9 |