[PATCH 06/17] drm/atmel-hlcdc: Convert to using __drm_atomic_helper_crtc_reset() for reset.

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Convert atmel-hlcdc 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@xxxxxxxxxxxxxxx>
Cc: Boris Brezillon <bbrezillon@xxxxxxxxxx>
---
 .../gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c    | 29 +++++++------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index 8070a558d7b1..816161d0a09d 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -400,24 +400,6 @@ void atmel_hlcdc_crtc_irq(struct drm_crtc *c)
 	atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c));
 }
 
-static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
-{
-	struct atmel_hlcdc_crtc_state *state;
-
-	if (crtc->state) {
-		__drm_atomic_helper_crtc_destroy_state(crtc->state);
-		state = drm_crtc_state_to_atmel_hlcdc_crtc_state(crtc->state);
-		kfree(state);
-		crtc->state = NULL;
-	}
-
-	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
-}
-
 static struct drm_crtc_state *
 atmel_hlcdc_crtc_duplicate_state(struct drm_crtc *crtc)
 {
@@ -447,6 +429,17 @@ static void atmel_hlcdc_crtc_destroy_state(struct drm_crtc *crtc,
 	kfree(state);
 }
 
+static void atmel_hlcdc_crtc_reset(struct drm_crtc *crtc)
+{
+	struct atmel_hlcdc_crtc_state *state =
+		kzalloc(sizeof(*state), GFP_KERNEL);
+
+	if (crtc->state)
+		atmel_hlcdc_crtc_destroy_state(crtc, crtc->state);
+
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
+}
+
 static int atmel_hlcdc_crtc_enable_vblank(struct drm_crtc *c)
 {
 	struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
-- 
2.20.1

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