diff options
| author | Aric Cyr <aric.cyr@amd.com> | 2020-05-26 20:56:53 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-07-01 08:59:21 +0300 |
| commit | eec3303de3378cdfaa0bb86f43546dbbd88f94e2 (patch) | |
| tree | 0bcccecef6ceb9553fa73bd59ff9d80df5c44be1 /drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | |
| parent | a96562b01815b20d0f8b37890c0316f516a1fb77 (diff) | |
| download | linux-eec3303de3378cdfaa0bb86f43546dbbd88f94e2.tar.xz | |
drm/amd/display: Improve DisplayPort monitor interop
[Why]
DC is very fast at link training and stream enablement
which causes issues such as blackscreens for non-compliant
monitors.
[How]
After debugging with scaler vendors we implement the
minimum delays at the necessary locations to ensure
the monitor does not hang. Delays are generic due to
lack of IEEE OUI information on the failing displays.
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Acked-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 0ce430cf4dd0..49380ed3aeae 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -1069,8 +1069,17 @@ void dce110_blank_stream(struct pipe_ctx *pipe_ctx) link->dc->hwss.set_abm_immediate_disable(pipe_ctx); } - if (dc_is_dp_signal(pipe_ctx->stream->signal)) + if (dc_is_dp_signal(pipe_ctx->stream->signal)) { pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc); + + /* + * After output is idle pattern some sinks need time to recognize the stream + * has changed or they enter protection state and hang. + */ + if (!dc_is_embedded_signal(pipe_ctx->stream->signal)) + msleep(60); + } + } |