[PATCH 391/459] drm/amd/display: Mark DSC resource as unused after copying to the secondary ODM pipe

[Alex Deucher]

From: Nikola Cornij <nikola.cornij at amd.com>

[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 at amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet Lakha at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at 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;
-- 
2.20.1