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drm/amd/display: Added HPO HW control shutdown support

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[Why]
HPO is only used for DP2.0. HPO HW control should be
disable when not being used to save power.

[How]
Shutdown HPO HW control during init hw.
Shutdown HPO HW control during stream disable.
Enable HPO HW control during stream enable if DP2.0.

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Jake Wang <haonan.wang2@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jake Wang
2021-10-21 19:10:17 -04:00
committed by Alex Deucher
parent edcf52caa9
commit 0a068b683c
9 changed files with 29 additions and 3 deletions
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3
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
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@@ -2397,6 +2397,9 @@ void dcn20_enable_stream(struct pipe_ctx *pipe_ctx)
* BY this, it is logic clean to separate stream and link
*/
if (is_dp_128b_132b_signal(pipe_ctx)) {
if (pipe_ctx->stream->ctx->dc->hwseq->funcs.setup_hpo_hw_control)
pipe_ctx->stream->ctx->dc->hwseq->funcs.setup_hpo_hw_control(
pipe_ctx->stream->ctx->dc->hwseq, true);
setup_dp_hpo_stream(pipe_ctx, true);
pipe_ctx->stream_res.hpo_dp_stream_enc->funcs->enable_stream(
pipe_ctx->stream_res.hpo_dp_stream_enc);