diff options
| author | Duncan Ma <Duncan.Ma@amd.com> | 2024-12-04 12:35:05 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-07-28 16:40:31 -0400 |
| commit | fa7cad4901931f0280a12f0bb375eda0294c6200 (patch) | |
| tree | 8d70647cfe5aff1674287c9bda5223d40f0e38a7 /drivers/gpu/drm/amd/display/dc/link | |
| parent | drm/amd/display: Remove unnecessary includes (diff) | |
| download | linux-fa7cad4901931f0280a12f0bb375eda0294c6200.tar.gz linux-fa7cad4901931f0280a12f0bb375eda0294c6200.zip | |
drm/amd/display: Add eDP AUXless ALPM
[Why & How]
Add AUX-less ALPM capability check and initialization
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Duncan Ma <Duncan.Ma@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link')
4 files changed, 52 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_factory.c b/drivers/gpu/drm/amd/display/dc/link/link_factory.c index de1143dbbd25..31a73867cd4c 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_factory.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_factory.c @@ -165,6 +165,8 @@ static void construct_link_service_dp_capability(struct link_service *link_srv) link_srv->dp_overwrite_extended_receiver_cap = dp_overwrite_extended_receiver_cap; link_srv->dp_decide_lttpr_mode = dp_decide_lttpr_mode; + link_srv->dp_get_lttpr_count = dp_get_lttpr_count; + link_srv->edp_get_alpm_support = edp_get_alpm_support; } /* link dp phy/dpia implements basic dp phy/dpia functionality such as diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c index 651926e547b9..e0c4416993d9 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c @@ -2506,3 +2506,40 @@ bool dp_is_sink_present(struct dc_link *link) return present; } + +uint8_t dp_get_lttpr_count(struct dc_link *link) +{ + if (dp_is_lttpr_present(link)) + return dp_parse_lttpr_repeater_count(link->dpcd_caps.lttpr_caps.phy_repeater_cnt); + + return 0; +} + +void edp_get_alpm_support(struct dc_link *link, + bool *auxless_support, + bool *auxwake_support) +{ + bool lttpr_present = dp_is_lttpr_present(link); + + if (auxless_support == NULL || auxwake_support == NULL) + return; + + *auxless_support = false; + *auxwake_support = false; + + if (!dc_is_embedded_signal(link->connector_signal)) + return; + + if (link->dpcd_caps.alpm_caps.bits.AUX_LESS_ALPM_CAP) { + if (lttpr_present) { + if (link->dpcd_caps.lttpr_caps.alpm.bits.AUX_LESS_ALPM_SUPPORTED) + *auxless_support = true; + } else + *auxless_support = true; + } + + if (link->dpcd_caps.alpm_caps.bits.AUX_WAKE_ALPM_CAP) { + if (!lttpr_present) + *auxwake_support = true; + } +} diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h index 940b147cc5d4..7170db5a1c13 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.h @@ -108,4 +108,10 @@ uint32_t link_bw_kbps_from_raw_frl_link_rate_data(uint8_t bw); bool dp_overwrite_extended_receiver_cap(struct dc_link *link); +uint8_t dp_get_lttpr_count(struct dc_link *link); + +void edp_get_alpm_support(struct dc_link *link, + bool *auxless_support, + bool *auxwake_support); + #endif /* __DC_LINK_DP_CAPABILITY_H__ */ diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c index 98ec9b5a559c..be714cbf6615 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c @@ -1042,7 +1042,13 @@ bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream (uint8_t *)&(replay_config.raw), sizeof(uint8_t)); memset(&alpm_config, 0, sizeof(alpm_config)); - alpm_config.bits.ENABLE = 1; + alpm_config.bits.ENABLE = link->replay_settings.config.alpm_mode != DC_ALPM_UNSUPPORTED ? 1 : 0; + + if (link->replay_settings.config.alpm_mode == DC_ALPM_AUXLESS) { + alpm_config.bits.ALPM_MODE_SEL = 1; + alpm_config.bits.ACDS_PERIOD_DURATION = 1; + } + dm_helpers_dp_write_dpcd( link->ctx, link, |