diff options
| author | Ashley Thomas <Ashley.Thomas2@amd.com> | 2020-08-07 05:18:37 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-09-16 00:52:40 +0300 |
| commit | 172c9b77816549c660aaa79e5df5c1be479f266b (patch) | |
| tree | 9b5b3836588ede57aa43efe3b9d9c84199da84da /drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | |
| parent | 5cd04c4846a3f910fc8a7150cae81542a0ab32d3 (diff) | |
| download | linux-172c9b77816549c660aaa79e5df5c1be479f266b.tar.xz | |
drm/amd/display: Power eDP panel back ON before link training retry
[why]
When link training failures occur for eDP, dp_disable_link_phy
is called which powers OFF eDP panel. After link training retry
delay, the next retry begins by calling dp_enable_link_phy
which does not issue a correspnding eDP panel power ON, leaving
panel powered OFF which leads to display OFF/dark.
[how]
Power ON eDP before next link training retry.
Signed-off-by: Ashley Thomas <Ashley.Thomas2@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@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 | 6 |
1 files changed, 6 insertions, 0 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 e4b3b71dad03..47fb09f41bfb 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 @@ -1619,6 +1619,9 @@ bool perform_link_training_with_retries( for (j = 0; j < attempts; ++j) { + DC_LOG_HW_LINK_TRAINING("%s: Beginning link training attempt %u of %d\n", + __func__, (unsigned int)j + 1, attempts); + dp_enable_link_phy( link, signal, @@ -1647,6 +1650,9 @@ bool perform_link_training_with_retries( if (j == (attempts - 1)) break; + DC_LOG_WARNING("%s: Link training attempt %u of %d failed\n", + __func__, (unsigned int)j + 1, attempts); + dp_disable_link_phy(link, signal); msleep(delay_between_attempts); |