drm/i915/hdcp: Add new remote capability check shim function

Create a remote HDCP capability shim function which can read the
remote monitor HDCP capability when in MST configuration.

--v2
-Add an assertion to make sure only mst encoder call this remote_cap
function [Ankit]

--v3
-rename remote_hdcp_cap to remote_hdcp_capability [Jani]

--v4
-fix hdcp2_prerequisite check condition
-Move intel_dp_hdcp_get_remote_capability to dp_mst shim instead of
having it in dp shim [Ankit]

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240226051017.1652970-2-suraj.kandpal@intel.com

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index c1a32f9f1199..801b8f0495bb 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -205,6 +205,22 @@ bool intel_hdcp2_get_capability(struct intel_connector *connector)
 	return capable;
 }
 
+void intel_hdcp_get_remote_capability(struct intel_connector *connector,
+				      bool *hdcp_capable,
+				      bool *hdcp2_capable)
+{
+	struct intel_hdcp *hdcp = &connector->hdcp;
+
+	if (!hdcp->shim->get_remote_hdcp_capability)
+		return;
+
+	hdcp->shim->get_remote_hdcp_capability(connector, hdcp_capable,
+					       hdcp2_capable);
+
+	if (!intel_hdcp2_prerequisite(connector))
+		*hdcp2_capable = false;
+}
+
 static bool intel_hdcp_in_use(struct drm_i915_private *i915,
 			      enum transcoder cpu_transcoder, enum port port)
 {