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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/gpu/drm/tilcdc/tilcdc_plane.c
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@@ -1,30 +1,17 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2015 Texas Instruments
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  * Author: Jyri Sarha <jsarha@ti.com>
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published by
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- * the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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- *
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- * You should have received a copy of the GNU General Public License along with
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- * this program.  If not, see <http://www.gnu.org/licenses/>.
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  */
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-
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-#include <drm/drmP.h>
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 #include <drm/drm_atomic.h>
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 #include <drm/drm_plane_helper.h>
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 #include <drm/drm_atomic_helper.h>
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-#include <uapi/drm/drm_fourcc.h>
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+#include <drm/drm_fourcc.h>
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 #include "tilcdc_drv.h"
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13
 
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-static struct drm_plane_funcs tilcdc_plane_funcs = {
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+static const struct drm_plane_funcs tilcdc_plane_funcs = {
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 	.update_plane	= drm_atomic_helper_update_plane,
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 	.disable_plane	= drm_atomic_helper_disable_plane,
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 	.destroy	= drm_plane_cleanup,
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@@ -75,8 +62,7 @@
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 		return -EINVAL;
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 	}
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64
 
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-	if (state->fb && old_state->fb &&
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-	    state->fb->format != old_state->fb->format) {
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+	if (old_state->fb && state->fb->format != old_state->fb->format) {
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 		dev_dbg(plane->dev->dev,
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 			"%s(): pixel format change requires mode_change\n",
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 			__func__);
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@@ -97,9 +83,11 @@
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 	if (WARN_ON(!state->fb || !state->crtc->state))
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 		return;
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-	tilcdc_crtc_update_fb(state->crtc,
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-			      state->fb,
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-			      state->crtc->state->event);
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+	if (tilcdc_crtc_update_fb(state->crtc,
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+				  state->fb,
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+				  state->crtc->state->event) == 0) {
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+		state->crtc->state->event = NULL;
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+	}
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 }
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 static const struct drm_plane_helper_funcs plane_helper_funcs = {