From e844cc250f33d207077d0af9337484d6c94048f0 Mon Sep 17 00:00:00 2001 From: Michael Strauss Date: Mon, 25 Jul 2022 16:24:42 -0400 Subject: drm/amd/display: Refactor LTTPR mode selection [WHY] Previously, LTTPR mode was decided during detection which makes link training inflexible as mode can't be dynamically changed. [HOW] -Remove lttpr_mode from link struct, and move to link training settings -Defer choosing LTTPR mode until link training Other DP changes included: -Only use fixed vs/pe link training sequence for 8b/10b encoding -Restrict fixed vs aux timeout workaround to Yellow Carp family Reviewed-by: Wenjing Liu Signed-off-by: Michael Strauss Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h') diff --git a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h index 6682d9e181c6..b304d450b038 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h +++ b/drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h @@ -194,6 +194,11 @@ enum dc_status dpcd_configure_lttpr_mode( enum dp_link_encoding dp_get_link_encoding_format(const struct dc_link_settings *link_settings); bool dp_retrieve_lttpr_cap(struct dc_link *link); +bool dp_is_lttpr_present(struct dc_link *link); +enum lttpr_mode dp_decide_lttpr_mode(struct dc_link *link, struct dc_link_settings *link_setting); +void dp_get_lttpr_mode_override(struct dc_link *link, enum lttpr_mode *override); +enum lttpr_mode dp_decide_8b_10b_lttpr_mode(struct dc_link *link); +enum lttpr_mode dp_decide_128b_132b_lttpr_mode(struct dc_link *link); bool dpcd_write_128b_132b_sst_payload_allocation_table( const struct dc_stream_state *stream, struct dc_link *link, -- cgit v1.2.3-59-g8ed1b