From: Mikita Lipski <mikita.lip...@amd.com>
[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
Cc: Harry Wentland <harry.wentl...@amd.com>
Cc: Lyude Paul <ly...@redhat.com>
Signed-off-by: Mikita Lipski <mikita.lip...@amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 8 ++++++++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 7557edee7db0..c376c8ccd391 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -491,3 +491,11 @@ 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);
+}
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
index 2da851b40042..a553ea046185 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
@@ -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);
--
2.17.1
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