From: Fangzhi Zuo <jerry....@amd.com>
Add log for MST/PCON specific use case:
1. If DP1.2 hub where gives reduced link bw and no dsc support.
2. If less than 4-lane configuration where gives reduced bw.
3. If FRL PCON enabled for asic.
4. Track MST sink count.
Reviewed-by: Hersen Wu <hersenxs...@amd.com>
Acked-by: Alex Hung <alex.h...@amd.com>
Signed-off-by: Fangzhi Zuo <jerry....@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
.../drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 12 +++++++++++-
.../drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 12 ++++++++++++
3 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 763bc92385da..ceeab2cd8569 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1622,6 +1622,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
/* TODO: Remove after DP2 receiver gets proper support of Cable ID
feature */
adev->dm.dc->debug.ignore_cable_id = true;
+ if (adev->dm.dc->caps.dp_hdmi21_pcon_support)
+ DRM_INFO("DP-HDMI FRL PCON supported\n");
+
r = dm_dmub_hw_init(adev);
if (r) {
DRM_ERROR("DMUB interface failed to initialize: status=%d\n",
r);
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 5c733d445fe9..c6794196a11d 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
@@ -403,6 +403,7 @@ bool dm_helpers_dp_mst_start_top_mgr(
bool boot)
{
struct amdgpu_dm_connector *aconnector = link->priv;
+ int ret;
if (!aconnector) {
DRM_ERROR("Failed to find connector for link!");
@@ -418,7 +419,16 @@ bool dm_helpers_dp_mst_start_top_mgr(
DRM_INFO("DM_MST: starting TM on aconnector: %p [id: %d]\n",
aconnector, aconnector->base.base.id);
- return (drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true) ==
0);
+ ret = drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true);
+ if (ret < 0) {
+ DRM_ERROR("DM_MST: Failed to set the device into MST mode!");
+ return false;
+ }
+
+ DRM_INFO("DM_MST: DP%x, %d-lane link detected\n",
aconnector->mst_mgr.dpcd[0],
+ aconnector->mst_mgr.dpcd[2] & DP_MAX_LANE_COUNT_MASK);
+
+ return true;
}
bool dm_helpers_dp_mst_stop_top_mgr(
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 0bff2cc20b02..33f53cae939d 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
@@ -177,6 +177,9 @@ amdgpu_dm_mst_connector_early_unregister(struct
drm_connector *connector)
if (dc_link->sink_count)
dc_link_remove_remote_sink(dc_link, dc_sink);
+ DC_LOG_MST("DM_MST: remove remote sink 0x%p, %d remaining\n",
+ dc_sink, dc_link->sink_count);
+
dc_sink_release(dc_sink);
aconnector->dc_sink = NULL;
aconnector->edid = NULL;
@@ -308,6 +311,9 @@ static int dm_dp_mst_get_modes(struct drm_connector
*connector)
return 0;
}
+ DC_LOG_MST("DM_MST: add remote sink 0x%p, %d
remaining\n",
+ dc_sink,
aconnector->dc_link->sink_count);
+
dc_sink->priv = aconnector;
aconnector->dc_sink = dc_sink;
}
@@ -341,6 +347,9 @@ static int dm_dp_mst_get_modes(struct drm_connector
*connector)
return 0;
}
+ DC_LOG_MST("DM_MST: add remote sink 0x%p, %d remaining\n",
+ dc_sink, aconnector->dc_link->sink_count);
+
dc_sink->priv = aconnector;
/* dc_link_add_remote_sink returns a new reference */
aconnector->dc_sink = dc_sink;
@@ -458,6 +467,9 @@ dm_dp_mst_detect(struct drm_connector *connector,
if (aconnector->dc_link->sink_count)
dc_link_remove_remote_sink(aconnector->dc_link,
aconnector->dc_sink);
+ DC_LOG_MST("DM_MST: remove remote sink 0x%p, %d remaining\n",
+ aconnector->dc_link, aconnector->dc_link->sink_count);
+
dc_sink_release(aconnector->dc_sink);
aconnector->dc_sink = NULL;
aconnector->edid = NULL;
--
2.39.1
