[PATCH 14/17] drm/tegra: Convert to using __drm_atomic_helper_crtc_reset() for reset.

[Maarten Lankhorst]

Convert tegra 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: Thierry Reding <thierry.reding at gmail.com>
Cc: Jonathan Hunter <jonathanh at nvidia.com>
Cc: linux-tegra at vger.kernel.org
---
 drivers/gpu/drm/tegra/dc.c | 30 +++++++++++-------------------
 1 file changed, 11 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 607a6ea17ecc..57c88d78cdaa 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1153,25 +1153,6 @@ static void tegra_dc_destroy(struct drm_crtc *crtc)
 	drm_crtc_cleanup(crtc);
 }
 
-static void tegra_crtc_reset(struct drm_crtc *crtc)
-{
-	struct tegra_dc_state *state;
-
-	if (crtc->state)
-		__drm_atomic_helper_crtc_destroy_state(crtc->state);
-
-	kfree(crtc->state);
-	crtc->state = NULL;
-
-	state = kzalloc(sizeof(*state), GFP_KERNEL);
-	if (state) {
-		crtc->state = &state->base;
-		crtc->state->crtc = crtc;
-	}
-
-	drm_crtc_vblank_reset(crtc);
-}
-
 static struct drm_crtc_state *
 tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
 {
@@ -1198,6 +1179,17 @@ static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc,
 	kfree(state);
 }
 
+static void tegra_crtc_reset(struct drm_crtc *crtc)
+{
+	struct tegra_dc_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
+
+	if (crtc->state)
+		tegra_crtc_atomic_destroy_state(crtc, crtc->state);
+
+	__drm_atomic_helper_crtc_reset(crtc, &state->base);
+	drm_crtc_vblank_reset(crtc);
+}
+
 #define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name }
 
 static const struct debugfs_reg32 tegra_dc_regs[] = {
-- 
2.20.1