[PATCH 12/17] drm/rcar-du: Convert to using __drm_atomic_helper_crtc_reset() for reset.

[Maarten Lankhorst]

Convert rcar-du to using __drm_atomic_helper_crtc_reset(), instead of
writing its own version. Instead of open coding destroy_state(), call
it directly for freeing the old state.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
Cc: linux-renesas-soc at vger.kernel.org
---
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 4cdea14d552f..7766551e67fc 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -891,22 +891,17 @@ static void rcar_du_crtc_cleanup(struct drm_crtc *crtc)
 
 static void rcar_du_crtc_reset(struct drm_crtc *crtc)
 {
-	struct rcar_du_crtc_state *state;
+	struct rcar_du_crtc_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
 
-	if (crtc->state) {
+	if (crtc->state)
 		rcar_du_crtc_atomic_destroy_state(crtc, crtc->state);
-		crtc->state = NULL;
-	}
 
-	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	__drm_atomic_helper_crtc_reset(crtc, &state->state);
 	if (state == NULL)
 		return;
 
 	state->crc.source = VSP1_DU_CRC_NONE;
 	state->crc.index = 0;
-
-	crtc->state = &state->state;
-	crtc->state->crtc = crtc;
 }
 
 static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
-- 
2.20.1