diff options
| author |   Leo (Hanghong) Ma <hanghong.ma@amd.com> | 2021-08-16 14:35:59 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2021-09-14 15:57:09 -0400 |
| commit | 952ab0b302396bd6cba0859c585208882389807d (patch) | |
| tree | cddfd86987098afaa11c02a74653a4163506bf4c /drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | |
| parent | drm/amd/display: Add DPCD writes at key points (diff) | |
| download | linux-dev-952ab0b302396bd6cba0859c585208882389807d.tar.xz linux-dev-952ab0b302396bd6cba0859c585208882389807d.zip | |
drm/amd/display: Fix system hang at boot
[Why]
During DQE's promotion test, system hang issue is found on linux
system;
[How]
1. Add NULL pointor check for the link in the sequence trace
function;
2. Get the right link for the stream encoder before blank DP
stream;
Acked-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c index 58abfa5a7bac..b9570b7c557b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c @@ -64,7 +64,7 @@ void dp_receiver_power_ctrl(struct dc_link *link, bool on) void dp_source_sequence_trace(struct dc_link *link, uint8_t dp_test_mode) { - if (link->dc->debug.enable_driver_sequence_debug) + if (link != NULL && link->dc->debug.enable_driver_sequence_debug) core_link_write_dpcd(link, DP_SOURCE_SEQUENCE, &dp_test_mode, sizeof(dp_test_mode)); } |