Requests ME to start the second stage of HDCP2.2 authentication,
called Locality Check.
On Success, ME FW will provide LC_Init message to send to hdcp sink.
v2:
Rebased.
v3:
cldev is passed as first parameter [Tomas]
Redundant comments and cast are removed [Tomas]
v4:
%zd used for ssize_t [Alexander]
%s/return -1/return -EIO [Alexander]
Style fixed [Uma]
v5:
Rebased.
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/misc/mei/hdcp/mei_hdcp.c | 58 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index 7c833378bc60..2a0369f46326 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -307,6 +307,62 @@ mei_store_pairing_info(struct mei_cl_device *cldev,
return 0;
}
+/*
+ * mei_initiate_locality_check:
+ * Function to prepare LC_Init.
+ *
+ * cldev : Pointer for mei client device
+ * data : Intel HW specific Data
+ * hdcp2_lc_init : Pointer for storing LC_Init
+ *
+ * Returns 0 on Success, <0 on Failure
+ */
+static int mei_initiate_locality_check(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_lc_init *lc_init_data)
+{
+ struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } };
+ struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } };
+ struct device *dev;
+ ssize_t byte;
+
+ if (!data || !lc_init_data)
+ return -EINVAL;
+
+ dev = &cldev->dev;
+
+ lc_init_in.header.api_version = HDCP_API_VERSION;
+ lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK;
+ lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
+ lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN;
+
+ lc_init_in.port.integrated_port_type = data->port_type;
+ lc_init_in.port.physical_port = data->port;
+
+ byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+ return byte;
+ }
+
+ byte = mei_cldev_recv(cldev, (u8 *)&lc_init_out, sizeof(lc_init_out));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+ return byte;
+ }
+
+ if (lc_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+ dev_dbg(dev, "ME cmd 0x%08X Failed. status: 0x%X\n",
+ WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status);
+ return -EIO;
+ }
+
+ lc_init_data->msg_id = HDCP_2_2_LC_INIT;
+ memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN);
+
+ return 0;
+}
+
struct i915_hdcp_component_ops mei_hdcp_component_ops = {
.owner = THIS_MODULE,
.initiate_hdcp2_session = mei_initiate_hdcp2_session,
@@ -314,7 +370,7 @@ struct i915_hdcp_component_ops mei_hdcp_component_ops = {
mei_verify_receiver_cert_prepare_km,
.verify_hprime = mei_verify_hprime,
.store_pairing_info = mei_store_pairing_info,
- .initiate_locality_check = NULL,
+ .initiate_locality_check = mei_initiate_locality_check,
.verify_lprime = NULL,
.get_session_key = NULL,
.repeater_check_flow_prepare_ack = NULL,
--
2.7.4
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