[Intel-gfx] [PATCH] drm/i915: Add HDCP capability info to i915_display_info.

[Anshuman Gupta]

To identify the HDCP capability of the display connected to CI
systems, we need to add the hdcp capability probing in i915_display_info.

This will also help to populate the HDCP capability of the CI systems
to CI H/W logs maintained at https://intel-gfx-ci.01.org/hardware/.
It will facilitate to determine the kms_content_protection behavior on
a particular CI system.

Cc: daniel.vetter at intel.com
Cc: ramalingam.c at intel.com
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 6b84d04a6a28..3ce79f536a8e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2569,6 +2569,30 @@ static void intel_panel_info(struct seq_file *m, struct intel_panel *panel)
 	intel_seq_print_mode(m, 2, mode);
 }
 
+static void intel_hdcp_info(struct seq_file *m,
+			    struct intel_connector *intel_connector)
+{
+	bool hdcp_cap, hdcp2_cap;
+
+	/* HDCP is supported by connector */
+	if (!intel_connector->hdcp.shim)
+		return;
+
+	seq_printf(m, "\tHDCP version: ");
+	hdcp_cap = intel_hdcp_capable(intel_connector);
+	hdcp2_cap = intel_hdcp2_capable(intel_connector);
+
+	if (hdcp_cap)
+		seq_puts(m, "HDCP1.4 ");
+	if (hdcp2_cap)
+		seq_puts(m, "HDCP2.2 ");
+
+	if (!hdcp_cap && !hdcp2_cap)
+		seq_puts(m, "None");
+
+	seq_puts(m, "\n");
+}
+
 static void intel_dp_info(struct seq_file *m,
 			  struct intel_connector *intel_connector)
 {
@@ -2577,6 +2601,7 @@ static void intel_dp_info(struct seq_file *m,
 
 	seq_printf(m, "\tDPCD rev: %x\n", intel_dp->dpcd[DP_DPCD_REV]);
 	seq_printf(m, "\taudio support: %s\n", yesno(intel_dp->has_audio));
+	intel_hdcp_info(m, intel_connector);
 	if (intel_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)
 		intel_panel_info(m, &intel_connector->panel);
 
@@ -2605,6 +2630,7 @@ static void intel_hdmi_info(struct seq_file *m,
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&intel_encoder->base);
 
 	seq_printf(m, "\taudio support: %s\n", yesno(intel_hdmi->has_audio));
+	intel_hdcp_info(m, intel_connector);
 }
 
 static void intel_lvds_info(struct seq_file *m,
-- 
2.21.0