From ea192af507d99014775a757bbdb5f6e487fc6c7a Mon Sep 17 00:00:00 2001
From: Michael Strauss <michael.strauss@amd.com>
Date: Thu, 20 Oct 2022 15:57:36 -0400
Subject: drm/amd/display: Only update link settings after successful MST link
train
[WHY]
Currently driver reduces verified link caps on DPIA devices if a link is
trained at a link rate below the max rate verified during link detection.
This blocks high bandwidth modes after setting a low bandwidth mode.
[HOW]
Only update link rate after a successful link train if link is MST.
Reviewed-by: Mustapha Ghaddar <Mustapha.Ghaddar@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 8 ++++++++
1 file changed, 8 insertions(+)
(limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c')
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index f72c013d3a5b..e47098fa5aac 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -971,3 +971,11 @@ void dm_helpers_enable_periodic_detection(struct dc_context *ctx, bool enable)
{
/* TODO: add periodic detection implementation */
}
+
+void dm_helpers_dp_mst_update_branch_bandwidth(
+ struct dc_context *ctx,
+ struct dc_link *link)
+{
+ // TODO
+}
+
--
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