diff options
| author | Michael Strauss <michael.strauss@amd.com> | 2023-12-01 06:25:00 -0700 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-12-06 15:22:32 -0500 |
| commit | fa745b554733ff0ed9ff918a0a53267300444c88 (patch) | |
| tree | fb19f0a97d31f4540530bdcc3b59ffbd73a730cb /drivers/gpu/drm/amd/display/dc | |
| parent | dd2c5fac91d46df9dc1bf025ef23eff4704bd85f (diff) | |
drm/amd/display: Only enumerate top local sink as DP2 output
[WHY]
Many DCN generations only have two HPO link encoders and therefore only
support driving a max of two DP2 PHYs. DP2 MST hubs currently can not
pass 3x display validation as each downstream sink is enumerated as
separate DP2 output.
[HOW]
Count MST hubs once by treating only 1st remote sink in topology as an
encoder.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c index 33eab80e89a8..6ba393e5b8ee 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c @@ -157,6 +157,15 @@ bool is_dp2p0_output_encoder(const struct pipe_ctx *pipe_ctx) { /* If this assert is hit then we have a link encoder dynamic management issue */ ASSERT(pipe_ctx->stream_res.hpo_dp_stream_enc ? pipe_ctx->link_res.hpo_dp_link_enc != NULL : true); + + /* Count MST hubs once by treating only 1st remote sink in topology as an encoder */ + if (pipe_ctx->stream->link && pipe_ctx->stream->link->remote_sinks[0]) { + return (pipe_ctx->stream_res.hpo_dp_stream_enc && + pipe_ctx->link_res.hpo_dp_link_enc && + dc_is_dp_signal(pipe_ctx->stream->signal) && + (pipe_ctx->stream->link->remote_sinks[0] == pipe_ctx->stream->sink)); + } + return (pipe_ctx->stream_res.hpo_dp_stream_enc && pipe_ctx->link_res.hpo_dp_link_enc && dc_is_dp_signal(pipe_ctx->stream->signal)); |