[PATCH V2 5/5] drm/vkms: Add plane helper struct

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This patch adds the struct drm_plane_helper_funcs and the required atomic
hooks.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx>
---
 drivers/gpu/drm/vkms/vkms_plane.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 2c25b1d6ab5b..f7f63143f6d0 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -19,6 +19,22 @@ static const struct drm_plane_funcs vkms_plane_funcs = {
 	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
 };
 
+static int vkms_plane_atomic_check(struct drm_plane *plane,
+				   struct drm_plane_state *state)
+{
+	return 0;
+}
+
+static void vkms_primary_plane_update(struct drm_plane *plane,
+				      struct drm_plane_state *old_state)
+{
+}
+
+static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
+	.atomic_check		= vkms_plane_atomic_check,
+	.atomic_update		= vkms_primary_plane_update,
+};
+
 struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
 {
 	struct drm_device *dev = &vkmsdev->drm;
@@ -42,5 +58,7 @@ struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
 		return ERR_PTR(ret);
 	}
 
+	drm_plane_helper_add(plane, &vkms_primary_helper_funcs);
+
 	return plane;
 }
-- 
2.17.1

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