From: Martin Tsai <martin.tsai@amd.com>
Date: Fri, 2 Feb 2024 06:39:29 +0000 (+0800)
Subject: drm/amd/display: should support dmub hw lock on Replay
X-Git-Tag: v6.6.85~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7803ca385941f941bce2ec6d4971456f59c312e8;p=thirdparty%2Fkernel%2Fstable.git

drm/amd/display: should support dmub hw lock on Replay

commit bfeefe6ea5f18cabb8fda55364079573804623f9 upstream.

[Why]
Without acquiring DMCUB hw lock, a race condition is caused with
Panel Replay feature, which will trigger a hang. Indicate that a
lock is necessary to prevent this when replay feature is enabled.

[How]
To allow dmub hw lock on Replay.

Reviewed-by: Robin Chen <robin.chen@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Martin Tsai <martin.tsai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c
index 2aa0e01a6891b..d0997126a00f1 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c
@@ -65,5 +65,9 @@ bool should_use_dmub_lock(struct dc_link *link)
 {
 	if (link->psr_settings.psr_version == DC_PSR_VERSION_SU_1)
 		return true;
+
+	if (link->replay_settings.replay_feature_enabled)
+		return true;
+
 	return false;
 }