diff options
| author | Lowry Li | 2018-08-23 16:30:19 +0800 |
|---|---|---|
| committer | Ayan Kumar Halder | 2018-08-24 17:31:37 +0100 |
| commit | a5ec8332d4280500544e316f76c04a7adc02ce03 (patch) | |
| tree | d197ad9eeb065ff018b94b40d144908c7e96dd21 /include/drm | |
| parent | 06e3c29716d9ba1eedfbd697afddbd7495491b26 (diff) | |
drm: Add per-plane pixel blend mode property
Pixel blend modes represent the alpha blending equation
selection, describing how the pixels from the current
plane are composited with the background.
Adds a pixel_blend_mode to drm_plane_state and a
blend_mode_property to drm_plane, and related support
functions.
Defines three blend modes in drm_blend.h.
Changes since v1:
- Moves the blending equation into the DOC comment
- Refines the comments of drm_plane_create_blend_mode_property to not
enumerate the #defines, but instead the string values
- Uses fg.* instead of pixel.* and plane_alpha instead of plane.alpha
Changes since v2:
- Refines the comments of drm_plane_create_blend_mode_property:
1) Puts the descriptions (after the ":") on a new line
2) Adds explaining why @supported_modes need PREMUL as default
Changes since v3:
- Refines drm_plane_create_blend_mode_property(). drm_property_add_enum()
can calculate the index itself just fine, so no point in having the
caller pass it in.
- Since the current DRM assumption is that alpha is premultiplied
as default, define DRM_MODE_BLEND_PREMULTI as 0 will be better.
- Refines some comments.
Changes since v4:
- Adds comments in drm_blend.h.
- Removes setting default value in drm_plane_create_blend_mode_property()
as it is already in __drm_atomic_helper_plane_reset().
- Fixes to use state->pixel_blend_mode instead of using
plane->state->pixel_blend_mode in reset function.
- Rebases on drm-misc-next.
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Lowry Li <lowry.li@arm.com>
Signed-off-by: Ayan Kumar Halder <ayan.halder@arm.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/245734/
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_blend.h | 6 | ||||
| -rw-r--r-- | include/drm/drm_plane.h | 9 |
2 files changed, 15 insertions, 0 deletions
diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h index 330c561c4c11..88bdfec3bd88 100644 --- a/include/drm/drm_blend.h +++ b/include/drm/drm_blend.h @@ -27,6 +27,10 @@ #include <linux/ctype.h> #include <drm/drm_mode.h> +#define DRM_MODE_BLEND_PREMULTI 0 +#define DRM_MODE_BLEND_COVERAGE 1 +#define DRM_MODE_BLEND_PIXEL_NONE 2 + struct drm_device; struct drm_atomic_state; struct drm_plane; @@ -52,4 +56,6 @@ int drm_plane_create_zpos_immutable_property(struct drm_plane *plane, unsigned int zpos); int drm_atomic_normalize_zpos(struct drm_device *dev, struct drm_atomic_state *state); +int drm_plane_create_blend_mode_property(struct drm_plane *plane, + unsigned int supported_modes); #endif diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 8a152dc16ea5..35ef64a9398b 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -117,6 +117,7 @@ struct drm_plane_state { * details. */ u16 alpha; + uint16_t pixel_blend_mode; /** * @rotation: @@ -659,6 +660,14 @@ struct drm_plane { * drm_plane_create_rotation_property(). */ struct drm_property *rotation_property; + /** + * @blend_mode_property: + * Optional "pixel blend mode" enum property for this plane. + * Blend mode property represents the alpha blending equation selection, + * describing how the pixels from the current plane are composited with + * the background. + */ + struct drm_property *blend_mode_property; /** * @color_encoding_property: |