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. v6: Collected the Rb-ed by. Rebasing. v7: Adjust to the new mei interface. Fix for Kdoc. v8: K-Doc addition. [Tomas] v9: renamed func as mei_hdcp_* [Tomas] Inline function is defined for DDI index [Tomas]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Uma Shankar uma.shankar@intel.com
Ack Thanks Tomas
drivers/misc/mei/hdcp/mei_hdcp.c | 57 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 17043fc60d18..c540d03470a6 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -291,6 +291,61 @@ mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data, return 0; }
+/**
- mei_hdcp_initiate_locality_check() - Prepare LC_Init
- @dev: device corresponding to the mei_cl_device
- @hdcp_data: Intel HW specific hdcp data
- @lc_init_data: LC_Init msg output
- Return: 0 on Success, <0 on Failure
- */
+static int +mei_hdcp_initiate_locality_check(struct device *dev,
struct hdcp_port_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 mei_cl_device *cldev;
- ssize_t byte;
- if (!dev || !data || !lc_init_data)
return -EINVAL;- cldev = to_mei_cl_device(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 = mei_get_ddi_index(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;
+}
static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -299,7 +354,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { mei_hdcp_verify_receiver_cert_prepare_km, .verify_hprime = mei_hdcp_verify_hprime, .store_pairing_info = mei_hdcp_store_pairing_info,
- .initiate_locality_check = NULL,
- .initiate_locality_check = mei_hdcp_initiate_locality_check, .verify_lprime = NULL, .get_session_key = NULL, .repeater_check_flow_prepare_ack = NULL,
-- 2.7.4