[PATCH 2/4] drm/vkms: Add atomic helpers functions

[Rodrigo Siqueira]

This patch adds the struct drm_crtc_helper_funcs with simple
atomic_check and atomic_enable functions.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo at gmail.com>
---
 drivers/gpu/drm/vkms/vkms_crtc.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index bf76cd39ece7..84cc05506b09 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -19,6 +19,22 @@ static const struct drm_crtc_funcs vkms_crtc_funcs = {
 	.atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
 };
 
+static int vkms_crtc_atomic_check(struct drm_crtc *crtc,
+				  struct drm_crtc_state *state)
+{
+	return 0;
+}
+
+static void vkms_crtc_atomic_enable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
+{
+}
+
+static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
+	.atomic_check  = vkms_crtc_atomic_check,
+	.atomic_enable = vkms_crtc_atomic_enable,
+};
+
 int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 		   struct drm_plane *primary, struct drm_plane *cursor)
 {
@@ -31,5 +47,7 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 		return ret;
 	}
 
+	drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
+
 	return ret;
 }
-- 
2.17.1