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From 2018a040d85987a9674e90266aa5fa3c745a91e5 Mon Sep 17 00:00:00 2001
From: Nikola Cornij <nikola.cornij@amd.com>
Date: Wed, 3 Apr 2019 12:17:34 -0400
Subject: [PATCH 2504/2940] drm/amd/display: Mark DSC resource as unused after
copying to the secondary ODM pipe
[why]
DSC resource has to be acquired before it can be used and simply copying
a reference to it is very likely to cause problems when accessing DSC.
[how]
Set DSC resource pointer to NULL to mark it as unused after primary pipe
resources were copied to the secondary ODM pipe.
Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index c9b7340c9601..b23333b74f5d 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -1427,6 +1427,9 @@ static bool dcn20_split_stream_for_combine(
secondary_pipe->plane_res.xfm = pool->transforms[secondary_pipe->pipe_idx];
secondary_pipe->plane_res.dpp = pool->dpps[secondary_pipe->pipe_idx];
secondary_pipe->plane_res.mpcc_inst = pool->dpps[secondary_pipe->pipe_idx]->inst;
+#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
+ secondary_pipe->stream_res.dsc = NULL;
+#endif
if (primary_pipe->bottom_pipe && primary_pipe->bottom_pipe != secondary_pipe) {
ASSERT(!secondary_pipe->bottom_pipe);
secondary_pipe->bottom_pipe = primary_pipe->bottom_pipe;
--
2.17.1
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