diff options
| author | Sivapiriyan Kumarasamy <sivapiriyan.kumarasamy@amd.com> | 2019-09-12 15:55:44 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-10-10 19:32:39 -0500 |
| commit | 82db2e3c39dbe9dcbfbd78aa6341647554faaaf9 (patch) | |
| tree | f803390b128c66542890cf37e35ac1c4876520ee | |
| parent | 15caeabc5787c15babad7ee444afe9c26df1c8b3 (diff) | |
drm/amd/display: fix bug with check for HPD Low in verify link cap
[Why]
There is a bug when determining if link training should be retried when
HPD is low in dp_verify_link_cap_with_retries.
[How]
Correctly, fail dp_verify_link_cap_with_retries without retry when
HPD is low.
Signed-off-by: Sivapiriyan Kumarasamy <sivapiriyan.kumarasamy@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Abdoulaye Berthe <Abdoulaye.Berthe@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 701b73926616..5a0c3384c16b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1656,11 +1656,14 @@ bool dp_verify_link_cap_with_retries( for (i = 0; i < attempts; i++) { int fail_count = 0; - enum dc_connection_type type; + enum dc_connection_type type = dc_connection_none; memset(&link->verified_link_cap, 0, sizeof(struct dc_link_settings)); - if (!dc_link_detect_sink(link, &type)) { + if (!dc_link_detect_sink(link, &type) || type == dc_connection_none) { + link->verified_link_cap.lane_count = LANE_COUNT_ONE; + link->verified_link_cap.link_rate = LINK_RATE_LOW; + link->verified_link_cap.link_spread = LINK_SPREAD_DISABLED; break; } else if (dp_verify_link_cap(link, &link->reported_link_cap, |