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From 02a63e0cc8cbad356b3ca8988e7d293706c27991 Mon Sep 17 00:00:00 2001
From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Wed, 1 May 2019 10:26:09 -0400
Subject: [PATCH 2031/2940] drm/amd/display: Reset planes for color management
changes
[Why]
For commits with allow_modeset=false and CRTC degamma changes the planes
aren't reset. This results in incorrect rendering.
[How]
Reset the planes when color management has changed on the CRTC.
Technically this will include regamma changes as well, but it doesn't
really after legacy userspace since those commit with
allow_modeset=true.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 27f2618c58aa..1219dad58fe1 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6458,6 +6458,10 @@ static bool should_reset_plane(struct drm_atomic_state *state,
if (!new_crtc_state)
return true;
+ /* CRTC Degamma changes currently require us to recreate planes. */
+ if (new_crtc_state->color_mgmt_changed)
+ return true;
+
if (drm_atomic_crtc_needs_modeset(new_crtc_state))
return true;
--
2.17.1
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