Merge tag 'drm-next-2018-10-24' of git://anongit.freedesktop.org/drm/drm

[platform/kernel/linux-starfive.git] / drivers / gpu / drm / drm_atomic_helper.c

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 1bb4c31..701cb33 100644 (file)
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -27,6 +27,7 @@
 
 #include <drm/drmP.h>
 #include <drm/drm_atomic.h>
+#include <drm/drm_atomic_uapi.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_atomic_helper.h>
@@ -3559,6 +3560,27 @@ void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
 EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
 
 /**
+ * __drm_atomic_helper_plane_reset - resets planes state to default values
+ * @plane: plane object, must not be NULL
+ * @state: atomic plane state, must not be NULL
+ *
+ * Initializes plane state to default. This is useful for drivers that subclass
+ * the plane state.
+ */
+void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
+                                    struct drm_plane_state *state)
+{
+       state->plane = plane;
+       state->rotation = DRM_MODE_ROTATE_0;
+
+       state->alpha = DRM_BLEND_ALPHA_OPAQUE;
+       state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
+
+       plane->state = state;
+}
+EXPORT_SYMBOL(__drm_atomic_helper_plane_reset);
+
+/**
  * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes
  * @plane: drm plane
  *
@@ -3572,15 +3594,8 @@ void drm_atomic_helper_plane_reset(struct drm_plane *plane)
 
        kfree(plane->state);
        plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL);
-
-       if (plane->state) {
-               plane->state->plane = plane;
-               plane->state->rotation = DRM_MODE_ROTATE_0;
-
-               /* Reset the alpha value to fully opaque if it matters */
-               if (plane->alpha_property)
-                       plane->state->alpha = plane->alpha_property->values[1];
-       }
+       if (plane->state)
+               __drm_atomic_helper_plane_reset(plane, plane->state);
 }
 EXPORT_SYMBOL(drm_atomic_helper_plane_reset);