diff options
| author | Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> | 2018-07-13 18:00:06 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-07-27 09:07:42 -0500 |
| commit | 824474ba38e27ccacc9d2dd066f780e9b3c2ad78 (patch) | |
| tree | 1bdd604e990ffe4a324805d13cab1a268632d576 /drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | |
| parent | 66c28d6df2d8292098839d365b82a1e30b567211 (diff) | |
drm/amd/display: Retry link training again
[Why]
Some receivers seem to fail the first link training but are good on
subsequent tries. We want to retry link training again. This fixes
HTC vive pro not lighting up after being disabled.
[How]
Check if the link training passed without fall back if this is not
the case then we retry link training.
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 5 |
1 files changed, 4 insertions, 1 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 9d901ca70588..58ee9aad13fb 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 @@ -1088,7 +1088,8 @@ static struct dc_link_settings get_max_link_cap(struct dc_link *link) bool dp_verify_link_cap( struct dc_link *link, - struct dc_link_settings *known_limit_link_setting) + struct dc_link_settings *known_limit_link_setting, + int *fail_count) { struct dc_link_settings max_link_cap = {0}; struct dc_link_settings cur_link_setting = {0}; @@ -1160,6 +1161,8 @@ bool dp_verify_link_cap( skip_video_pattern); if (status == LINK_TRAINING_SUCCESS) success = true; + else + (*fail_count)++; } if (success) |