openwrt/target/linux/bcm27xx/patches-6.1/950-0005-drm-atomic-Don-t-fixup-modes-that-haven-t-been-reset.patch

From 5e5243cf497ccec7265b79cf84beb0f60550e113 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 7 Jan 2021 16:30:55 +0000
Subject: [PATCH] drm/atomic: Don't fixup modes that haven't been reset

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/drm_atomic_helper.c | 5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -443,6 +443,11 @@ mode_fixup(struct drm_atomic_state *stat
 		new_crtc_state =
 			drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
 
+		if (!new_crtc_state->mode_changed &&
+		    !new_crtc_state->connectors_changed) {
+			continue;
+		}
+
 		/*
 		 * Each encoder has at most one connector (since we always steal
 		 * it away), so we won't call ->mode_fixup twice.