[Intel-gfx] [PATCH v3 4/4] drm/i915/debugfs: hdcp capability of a sink

[Ramalingam C]

Add a debugfs entry for providing the hdcp capabilities of the sink
connected to the HDCP capable connectors.

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 29 +++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_hdmi.c   | 16 +++++++++++++++-
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 5f3c639522fa..6d09af66da0f 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4946,6 +4946,28 @@ static int i915_panel_show(struct seq_file *m, void *data)
 }
 DEFINE_SHOW_ATTRIBUTE(i915_panel);
 
+static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data)
+{
+	struct drm_connector *connector = m->private;
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	if (connector->status != connector_status_connected)
+		return -ENODEV;
+
+	/* HDCP is supported by connector */
+	if (!intel_connector->hdcp_shim)
+		return -EINVAL;
+
+	seq_printf(m, "%s:%d HDCP version: ", connector->name,
+		   connector->base.id);
+	seq_printf(m, "%s ", !intel_hdcp_capable(intel_connector) ?
+		   "None" : "HDCP1.4");
+	seq_puts(m, "\n");
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
+
 /**
  * i915_debugfs_connector_add - add i915 specific connector debugfs files
  * @connector: pointer to a registered drm_connector
@@ -4975,5 +4997,12 @@ int i915_debugfs_connector_add(struct drm_connector *connector)
 				    connector, &i915_psr_sink_status_fops);
 	}
 
+	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+	    connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
+	    connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
+		debugfs_create_file("i915_hdcp_sink_capability", S_IRUGO, root,
+				    connector, &i915_hdcp_sink_capability_fops);
+	}
+
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 89d5e3984452..72e8a73dfa1c 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2072,6 +2072,20 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
 	chv_phy_release_cl2_override(encoder);
 }
 
+static int
+intel_hdmi_connector_register(struct drm_connector *connector)
+{
+	int ret;
+
+	ret = intel_connector_register(connector);
+	if (ret)
+		return ret;
+
+	i915_debugfs_connector_add(connector);
+
+	return ret;
+}
+
 static void intel_hdmi_destroy(struct drm_connector *connector)
 {
 	if (intel_attached_hdmi(connector)->cec_notifier)
@@ -2086,7 +2100,7 @@ static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_get_property = intel_digital_connector_atomic_get_property,
 	.atomic_set_property = intel_digital_connector_atomic_set_property,
-	.late_register = intel_connector_register,
+	.late_register = intel_hdmi_connector_register,
 	.early_unregister = intel_connector_unregister,
 	.destroy = intel_hdmi_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-- 
2.7.4