From 92888ed4ed22199705c3e9f936d4186281283850 Mon Sep 17 00:00:00 2001
From: Mikita Lipski <mikita.lipski@amd.com>
Date: Sat, 16 Nov 2019 15:45:37 -0500
Subject: drm/amd/display: Add PBN per slot calculation for DSC
Git-commit: dcade880e342407fb76bdf4529b886c3ebedc6b3
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
[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>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
.../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 6b33a01dbba2..9c6c2815c7a1 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
@@ -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);
+}
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);
--
2.28.0