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drm/amd/display: Add PBN per slot calculation for DSC 

[why]
Need to calculate VCPI slots differently for DSC
to take in account current link rate, link count
and FEC.
[how]
Add helper to get pbn_div from dc_link

Acked-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mikita Lipski 2019-11-16 15:45:37 -05:00 committed by Alex Deucher
parent 9e5b959036
commit dcade880e3
2 changed files with 10 additions and 0 deletions
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8
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
View File

@ -493,3 +493,11 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
aconnector->connector_id);
}
int dm_mst_get_pbn_divider(struct dc_link *link)
{
if (!link)
return 0;
return dc_link_bandwidth_kbps(link,
dc_link_get_link_cap(link)) / (8 * 1000 * 54);
}

2
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
View File

@ -29,6 +29,8 @@
struct amdgpu_display_manager;
struct amdgpu_dm_connector;
int dm_mst_get_pbn_divider(struct dc_link *link);
void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
struct amdgpu_dm_connector *aconnector);