From b7cc1312c110f8760a3d3e8e41a6d84e32f71a61 Mon Sep 17 00:00:00 2001
From: Stylon Wang <stylon.wang@amd.com>
Date: Wed, 7 Apr 2021 18:14:55 +0800
Subject: [PATCH] drm/amd/display: Expose internal display flag via debugfs
[Why & How]
Add a per-connector debugfs entry to expose internal display flag,
which is indication that the display is "internally connected"
and not hotpluggable.
Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 20 ++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 529545045a3e6..656bc8f00a42a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -925,6 +925,22 @@ static int hdcp_sink_capability_show(struct seq_file *m, void *data)
return 0;
}
#endif
+
+/*
+ * Returns whether the connected display is internal and not hotpluggable.
+ * Example usage: cat /sys/kernel/debug/dri/0/DP-1/internal_display
+ */
+static int internal_display_show(struct seq_file *m, void *data)
+{
+ struct drm_connector *connector = m->private;
+ struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
+ struct dc_link *link = aconnector->dc_link;
+
+ seq_printf(m, "Internal: %u\n", link->is_internal_display);
+
+ return 0;
+}
+
/* function description
*
* generic SDP message access for testing
@@ -2369,6 +2385,7 @@ DEFINE_SHOW_ATTRIBUTE(dp_lttpr_status);
#ifdef CONFIG_DRM_AMD_DC_HDCP
DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability);
#endif
+DEFINE_SHOW_ATTRIBUTE(internal_display);
static const struct file_operations dp_dsc_clock_en_debugfs_fops = {
.owner = THIS_MODULE,
@@ -2600,7 +2617,8 @@ static const struct {
} connector_debugfs_entries[] = {
{"force_yuv420_output", &force_yuv420_output_fops},
{"output_bpc", &output_bpc_fops},
- {"trigger_hotplug", &trigger_hotplug_debugfs_fops}
+ {"trigger_hotplug", &trigger_hotplug_debugfs_fops},
+ {"internal_display", &internal_display_fops}
};
void connector_debugfs_init(struct amdgpu_dm_connector *connector)
--
GitLab