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drm/dp_mst: Use kHz as link rate units when settig source max link caps at init

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[why]
Link rate in kHz is what is eventually required to calculate the link
bandwidth, which makes kHz a more generic unit. This should also make
forward-compatibility with new DP standards easier.

[how]
- Replace 'link rate DPCD code' with 'link rate in kHz' when used with
drm_dp_mst_topology_mgr_init()
- Add/remove related DPCD code conversion from/to kHz where applicable

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512210011.8425-2-nikola.cornij@amd.com
This commit is contained in:
Nikola Cornij
2021-05-12 17:00:11 -04:00
committed by Lyude Paul
parent ffa52910fa
commit 71b970c868
6 changed files with 16 additions and 15 deletions
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4
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
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@@ -461,8 +461,8 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
&aconnector->dm_dp_aux.aux,
16,
4,
(u8)max_link_enc_cap.lane_count,
(u8)max_link_enc_cap.link_rate,
max_link_enc_cap.lane_count,
drm_dp_bw_code_to_link_rate(max_link_enc_cap.link_rate),
aconnector->connector_id);
drm_connector_attach_dp_subconnector_property(&aconnector->base);