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

Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Liviu Dudau <liviu.du...@arm.com>
Cc: Brian Starkey <brian.star...@arm.com>
---
 drivers/gpu/drm/arm/malidp_crtc.c | 28 +++++++++++-----------------
 1 file changed, 11 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/arm/malidp_crtc.c 
b/drivers/gpu/drm/arm/malidp_crtc.c
index 56aad288666e..d6690e016f0b 100644
--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -463,23 +463,6 @@ static struct drm_crtc_state 
*malidp_crtc_duplicate_state(struct drm_crtc *crtc)
        return &state->base;
 }
 
-static void malidp_crtc_reset(struct drm_crtc *crtc)
-{
-       struct malidp_crtc_state *state = NULL;
-
-       if (crtc->state) {
-               state = to_malidp_crtc_state(crtc->state);
-               __drm_atomic_helper_crtc_destroy_state(crtc->state);
-       }
-
-       kfree(state);
-       state = kzalloc(sizeof(*state), GFP_KERNEL);
-       if (state) {
-               crtc->state = &state->base;
-               crtc->state->crtc = crtc;
-       }
-}
-
 static void malidp_crtc_destroy_state(struct drm_crtc *crtc,
                                      struct drm_crtc_state *state)
 {
@@ -493,6 +476,17 @@ static void malidp_crtc_destroy_state(struct drm_crtc 
*crtc,
        kfree(mali_state);
 }
 
+static void malidp_crtc_reset(struct drm_crtc *crtc)
+{
+       struct malidp_crtc_state *state =
+               kzalloc(sizeof(*state), GFP_KERNEL);
+
+       if (crtc->state)
+               malidp_crtc_destroy_state(crtc, crtc->state);
+
+       __drm_atomic_helper_crtc_reset(crtc, &state->base);
+}
+
 static int malidp_crtc_enable_vblank(struct drm_crtc *crtc)
 {
        struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
-- 
2.20.1

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