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From 4d86e5effb8623372ab091d27d036ba310f392db Mon Sep 17 00:00:00 2001
From: Shirish S <shirish.s@amd.com>
Date: Fri, 27 Oct 2017 03:25:55 +0000
Subject: [PATCH 2628/4131] drm/amd/display: check if modeset is required
before adding plane
Adding affected planes without checking if modeset is requested from the user space causes performance regression in video p/b scenarios when full screen p/b is not composited.
Hence add a check before adding a plane as affected.
bug: https://bugs.freedesktop.org/show_bug.cgi?id=103408
Change-Id: Id51be32d8dffdb2627576addf6c5c3145201ce54
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Shirish S <shirish.s@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
1 file changed, 3 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 b5af98d..0abcb16 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4896,6 +4896,9 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
#else
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
#endif
+ if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
+ continue;
+
if (!new_crtc_state->enable)
continue;
--
2.7.4
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