Add debugfs to get HDCP capability. This is also useful for
kms_content_protection igt test.
Use:
cat /sys/kernel/debug/dri/0/DP-1/hdcp_sink_capability
cat /sys/kernel/debug/dri/0/HDMI-A-1/hdcp_sink_capability
Signed-off-by: Bhawanpreet Lakha <bhawanpreet.la...@amd.com>
---
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 61 +++++++++++++++++++
1 file changed, 61 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 ead5c05eec92..52982c8c871f 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
@@ -815,6 +815,44 @@ static int vrr_range_show(struct seq_file *m, void *data)
return 0;
}
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+/*
+ * Returns the HDCP capability of the Display (1.4 for now).
+ *
+ * NOTE* Not all HDMI displays report their HDCP caps even when they are
capable.
+ * Since its rare for a display to not be HDCP 1.4 capable, we set HDMI as
always capable.
+ *
+ * Example usage: cat /sys/kernel/debug/dri/0/DP-1/hdcp_sink_capability
+ * or cat /sys/kernel/debug/dri/0/HDMI-A-1/hdcp_sink_capability
+ */
+static int hdcp_sink_capability_show(struct seq_file *m, void *data)
+{
+ struct drm_connector *connector = m->private;
+ struct amdgpu_dm_connector *aconnector =
to_amdgpu_dm_connector(connector);
+ bool hdcp_cap, hdcp2_cap;
+
+ if (connector->status != connector_status_connected)
+ return -ENODEV;
+
+ seq_printf(m, "%s:%d HDCP version: ", connector->name,
connector->base.id);
+
+ hdcp_cap = dc_link_is_hdcp14(aconnector->dc_link);
+ hdcp2_cap = dc_link_is_hdcp22(aconnector->dc_link);
+
+
+ if (hdcp_cap)
+ seq_printf(m, "%s ", "HDCP1.4");
+ if (hdcp2_cap)
+ seq_printf(m, "%s ", "HDCP2.2");
+
+ if (!hdcp_cap && !hdcp2_cap)
+ seq_printf(m, "%s ", "None");
+
+ seq_puts(m, "\n");
+
+ return 0;
+}
+#endif
/* function description
*
* generic SDP message access for testing
@@ -940,6 +978,9 @@ static ssize_t dp_dpcd_data_read(struct file *f, char
__user *buf,
DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer);
DEFINE_SHOW_ATTRIBUTE(output_bpc);
DEFINE_SHOW_ATTRIBUTE(vrr_range);
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability);
+#endif
static const struct file_operations dp_link_settings_debugfs_fops = {
.owner = THIS_MODULE,
@@ -995,12 +1036,23 @@ static const struct {
{"test_pattern", &dp_phy_test_pattern_fops},
{"output_bpc", &output_bpc_fops},
{"vrr_range", &vrr_range_fops},
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+ {"hdcp_sink_capability", &hdcp_sink_capability_fops},
+#endif
{"sdp_message", &sdp_message_fops},
{"aux_dpcd_address", &dp_dpcd_address_debugfs_fops},
{"aux_dpcd_size", &dp_dpcd_size_debugfs_fops},
{"aux_dpcd_data", &dp_dpcd_data_debugfs_fops}
};
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+static const struct {
+ char *name;
+ const struct file_operations *fops;
+} hdmi_debugfs_entries[] = {
+ {"hdcp_sink_capability", &hdcp_sink_capability_fops}
+};
+#endif
/*
* Force YUV420 output if available from the given mode
*/
@@ -1066,6 +1118,15 @@ void connector_debugfs_init(struct amdgpu_dm_connector
*connector)
debugfs_create_file_unsafe("force_yuv420_output", 0644, dir, connector,
&force_yuv420_output_fops);
+#ifdef CONFIG_DRM_AMD_DC_HDCP
+ if (connector->base.connector_type == DRM_MODE_CONNECTOR_HDMIA) {
+ for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_entries); i++) {
+ debugfs_create_file(hdmi_debugfs_entries[i].name,
+ 0644, dir, connector,
+ hdmi_debugfs_entries[i].fops);
+ }
+ }
+#endif
}
/*
--
2.17.1
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