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]
Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
.../drm/i915/display/intel_display_types.h | 4 +++
drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 27 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_hdcp.c | 16 +++++++++++
drivers/gpu/drm/i915/display/intel_hdcp.h | 3 +++
4 files changed, 50 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index b77070d0897c..9becc5da8731 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -532,6 +532,10 @@ struct intel_hdcp_shim {
/* HDCP2.2 Link Integrity Check */
int (*check_2_2_link)(struct intel_digital_port *dig_port,
struct intel_connector *connector);
+
+ /* HDCP remote sink cap */
+ int (*get_remote_hdcp_capability)(struct intel_connector *connector,
+ bool *hdcp_capable, bool *hdcp2_capable);
};
struct intel_hdcp {
diff --git a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
index 91736c7e3c83..c32303e7a059 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
@@ -668,6 +668,32 @@ int intel_dp_hdcp2_get_capability(struct intel_connector *connector,
return _intel_dp_hdcp2_get_capability(aux, capable);
}
+static
+int intel_dp_hdcp_get_remote_capability(struct intel_connector *connector,
+ bool *hdcp_capable,
+ bool *hdcp2_capable)
+{
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
+ struct drm_dp_aux *aux = &connector->port->aux;
+ u8 bcaps;
+ int ret;
+
+ if (!intel_encoder_is_mst(connector->encoder))
+ return -EINVAL;
+
+ ret = _intel_dp_hdcp2_get_capability(aux, hdcp2_capable);
+ if (ret)
+ return ret;
+
+ ret = intel_dp_hdcp_read_bcaps(aux, i915, &bcaps);
+ if (ret)
+ return ret;
+
+ *hdcp_capable = bcaps & DP_BCAPS_HDCP_CAPABLE;
+
+ return 0;
+}
+
static const struct intel_hdcp_shim intel_dp_hdcp_shim = {
.write_an_aksv = intel_dp_hdcp_write_an_aksv,
.read_bksv = intel_dp_hdcp_read_bksv,
@@ -685,6 +711,7 @@ static const struct intel_hdcp_shim intel_dp_hdcp_shim = {
.config_stream_type = intel_dp_hdcp2_config_stream_type,
.check_2_2_link = intel_dp_hdcp2_check_link,
.hdcp_2_2_get_capability = intel_dp_hdcp2_get_capability,
+ .get_remote_hdcp_capability = intel_dp_hdcp_get_remote_capability,
.protocol = HDCP_PROTOCOL_DP,
};
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index c1a32f9f1199..16b2b180563f 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)
{
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h b/drivers/gpu/drm/i915/display/intel_hdcp.h
index aeefb3c13d2c..477f2d2bb120 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.h
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
@@ -40,6 +40,9 @@ void intel_hdcp_update_pipe(struct intel_atomic_state *state,
bool is_hdcp_supported(struct drm_i915_private *i915, enum port port);
bool intel_hdcp_get_capability(struct intel_connector *connector);
bool intel_hdcp2_get_capability(struct intel_connector *connector);
+void intel_hdcp_get_remote_capability(struct intel_connector *connector,
+ bool *hdcp_capable,
+ bool *hdcp2_capable);
void intel_hdcp_component_init(struct drm_i915_private *i915);
void intel_hdcp_component_fini(struct drm_i915_private *i915);
void intel_hdcp_cleanup(struct intel_connector *connector);
--
2.25.1
