drm: renesas: shmobile: Atomic conversion part 2

Implement atomic mode setting for the CRTC, using the existing dpms
callback.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/ca2a00200ef5ac899a6131087d0a30de1c806119.1694767209.git.geert+renesas@glider.be

drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c

@@ -11,6 +11,7 @@
 #include <linux/media-bus-format.h>
 #include <linux/pm_runtime.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_atomic_uapi.h>
@@ -319,27 +320,6 @@ static void shmob_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
 	scrtc->dpms = mode;
 }
 
-static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
-{
-	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
-}
-
-static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
-{
-	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
-}
-
-static int shmob_drm_crtc_atomic_check(struct drm_crtc *crtc,
-				       struct drm_atomic_state *state)
-{
-	return 0;
-}
-
-static void shmob_drm_crtc_atomic_begin(struct drm_crtc *crtc,
-					struct drm_atomic_state *state)
-{
-}
-
 static void shmob_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 					struct drm_atomic_state *state)
 {
@@ -356,13 +336,22 @@ static void shmob_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 	}
 }
 
+static void shmob_drm_crtc_atomic_enable(struct drm_crtc *crtc,
+					 struct drm_atomic_state *state)
+{
+	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
+}
+
+static void shmob_drm_crtc_atomic_disable(struct drm_crtc *crtc,
+					  struct drm_atomic_state *state)
+{
+	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+}
+
 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
-	.dpms = shmob_drm_crtc_dpms,
-	.prepare = shmob_drm_crtc_mode_prepare,
-	.commit = shmob_drm_crtc_mode_commit,
-	.atomic_check = shmob_drm_crtc_atomic_check,
-	.atomic_begin = shmob_drm_crtc_atomic_begin,
 	.atomic_flush = shmob_drm_crtc_atomic_flush,
+	.atomic_enable = shmob_drm_crtc_atomic_enable,
+	.atomic_disable = shmob_drm_crtc_atomic_disable,
 };
 
 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,