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drm/amd/display: Avoid DPMS-on for phantom stream

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[Why & How]
Calling dc_update_planes_and_stream separately for stream and its
phantom stream causes a NULL pointer dereference, since the phantom is
destroyed on the first call.

Skip the call for phantom streams.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ilya Bakoulin 2026-05-19 16:20:39 -04:00 committed by Alex Deucher
parent 5a7f0ef901
commit 10f5f9c0ef
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
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@ -145,6 +145,8 @@ static void dp_retrain_link_dp_test(struct dc_link *link,
// Set DPMS on with stream update
// Cache all streams on current link since dc_update_planes_and_stream might kill current_state
for (i = 0; i < MAX_PIPES; i++) {
if (state->streams[i] && state->streams[i]->is_phantom)
continue;
if (state->streams[i] && state->streams[i]->link && state->streams[i]->link == link)
streams_on_link[num_streams_on_link++] = state->streams[i];
}