We had this wired up already internally but initially did not expose the
property pending bikeshed about alpha and color management properties.
I noted that drm-hwc2 was looking for this property, and a couple other
drivers already support it in the same way.  So time to expose it!

Signed-off-by: Rob Clark <robdcl...@gmail.com>
---
 drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c 
b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
index 432c098..b6f1fc66 100644
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c
@@ -120,6 +120,7 @@ static void mdp5_plane_install_properties(struct drm_plane 
*plane,
                                ARRAY_SIZE(name##_prop_enum_list))
 
        INSTALL_RANGE_PROPERTY(zpos, ZPOS, 1, 255, 1);
+       INSTALL_RANGE_PROPERTY(alpha, ALPHA, 0, 255, 255);
 
        mdp5_plane_install_rotation_property(dev, plane);
 
@@ -148,6 +149,7 @@ static int mdp5_plane_atomic_set_property(struct drm_plane 
*plane,
        } while (0)
 
        SET_PROPERTY(zpos, ZPOS, uint8_t);
+       SET_PROPERTY(alpha, ALPHA, uint8_t);
 
        dev_err(dev->dev, "Invalid property\n");
        ret = -EINVAL;
@@ -176,6 +178,7 @@ static int mdp5_plane_atomic_get_property(struct drm_plane 
*plane,
        } while (0)
 
        GET_PROPERTY(zpos, ZPOS, uint8_t);
+       GET_PROPERTY(alpha, ALPHA, uint8_t);
 
        dev_err(dev->dev, "Invalid property\n");
        ret = -EINVAL;
-- 
2.7.4

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