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drm/amd/display: retain/release stream pointer in link enc table

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[why]
At every reference to stream pointer, we need to increment/decrement the
kref_count.  Not doing so will result in invalid stream pointer still
alive after hibernate cycle.

[how]
Call stream retain/release whenever the link encoder assignment is set
to true/false since it indicates if we want to reference the stream
pointer or not.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Sung Joon Kim <sungkim@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sung Joon Kim 2021-11-04 16:52:05 -04:00 committed by Alex Deucher
parent e43098f6ab
commit 4cbe435dd6
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/core/dc_link_enc_cfg.c
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@ -122,6 +122,7 @@ static void remove_link_enc_assignment(
stream->link_enc = NULL;
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].eng_id = ENGINE_ID_UNKNOWN;
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i].stream = NULL;
dc_stream_release(stream);
break;
}
}
@ -144,6 +145,7 @@ static void add_link_enc_assignment(
*/
for (i = 0; i < state->stream_count; i++) {
if (stream == state->streams[i]) {
dc_stream_retain(stream);
state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[i] = (struct link_enc_assignment){
.valid = true,
.ep_id = (struct display_endpoint_id) {