From: Fangzhi Zuo <jerry....@amd.com>
DP2 sequence is triggered only if VESA certified cable is detected.
Force DP2 sequence with uncertified cable for testing purpose.
Reviewed-by: Wenjing Liu <wenjing....@amd.com>
Acked-by: Stylon Wang <stylon.w...@amd.com>
Signed-off-by: Fangzhi Zuo <jerry....@amd.com>
---
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 26 +++++++++++++++++++
1 file changed, 26 insertions(+)
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 306a16b7be75..d7611c81fca8 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
@@ -3431,6 +3431,30 @@ static int dp_force_sst_get(void *data, u64 *val)
}
DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get,
dp_force_sst_set, "%llu\n");
+
+/*
+ * Force DP2 sequence without VESA certified cable.
+ * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_ignore_cable_id
+ */
+static int dp_ignore_cable_id_set(void *data, u64 val)
+{
+ struct amdgpu_device *adev = data;
+
+ adev->dm.dc->debug.ignore_cable_id = val;
+
+ return 0;
+}
+
+static int dp_ignore_cable_id_get(void *data, u64 *val)
+{
+ struct amdgpu_device *adev = data;
+
+ *val = adev->dm.dc->debug.ignore_cable_id;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(dp_ignore_cable_id_ops, dp_ignore_cable_id_get,
+ dp_ignore_cable_id_set, "%llu\n");
#endif
/*
@@ -3549,6 +3573,8 @@ void dtn_debugfs_init(struct amdgpu_device *adev)
#if defined(CONFIG_DRM_AMD_DC_DCN)
debugfs_create_file("amdgpu_dm_dp_set_mst_en_for_sst", 0644, root, adev,
&dp_set_mst_en_for_sst_ops);
+ debugfs_create_file("amdgpu_dm_dp_ignore_cable_id", 0644, root, adev,
+ &dp_ignore_cable_id_ops);
#endif
debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev,
--
2.34.1
