Provides Pairing info to ME to store.
Pairing is a process to fast track the subsequent authentication
with the same HDCP sink.
On Success, received HDCP pairing info is stored in non-volatile
memory of ME.
v2:
Rebased.
v3:
cldev is passed as first parameter [Tomas]
Redundant comments and cast are removed [Tomas]
v4:
%zd for ssize_t [Alexander]
%s/return -1/return -EIO [Alexander]
Style fixed [Uma]
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/misc/mei/hdcp/mei_hdcp.c | 61 ++++++++++++++++++++++++++++++++++++++++
include/linux/mei_hdcp.h | 10 +++++++
2 files changed, 71 insertions(+)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index a521d111751a..878485e53d5a 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -247,6 +247,67 @@ int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data,
}
EXPORT_SYMBOL(mei_verify_hprime);
+/*
+ * mei_store_pairing_info:
+ * Function to store pairing info received from panel
+ *
+ * cldev : Pointer for mei client device
+ * data : Intel HW specific Data
+ * pairing_info : Pointer for AKE_Send_Pairing_Info
+ *
+ * Returns 0 on Success, <0 on Failure
+ */
+int mei_store_pairing_info(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+ struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } };
+ struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } };
+ struct device *dev;
+ ssize_t byte;
+
+ if (!data || !pairing_info)
+ return -EINVAL;
+
+ dev = &cldev->dev;
+
+ pairing_info_in.header.api_version = HDCP_API_VERSION;
+ pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO;
+ pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS;
+ pairing_info_in.header.buffer_len =
+ WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN;
+
+ pairing_info_in.port.integrated_port_type = data->port_type;
+ pairing_info_in.port.physical_port = data->port;
+
+ memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km,
+ sizeof(pairing_info_in.e_kh_km));
+
+ byte = mei_cldev_send(cldev, (u8 *)&pairing_info_in,
+ sizeof(pairing_info_in));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
+ return byte;
+ }
+
+ byte = mei_cldev_recv(cldev, (u8 *)&pairing_info_out,
+ sizeof(pairing_info_out));
+ if (byte < 0) {
+ dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
+ return byte;
+ }
+
+ if (pairing_info_out.header.status != ME_HDCP_STATUS_SUCCESS) {
+ dev_dbg(dev, "ME cmd 0x%08X failed. Status: 0x%X\n",
+ WIRED_AKE_SEND_PAIRING_INFO,
+ pairing_info_out.header.status);
+ return -EIO;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(mei_store_pairing_info);
+
static void
mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled)
{
diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h
index b97eb4d15393..23291d073d4b 100644
--- a/include/linux/mei_hdcp.h
+++ b/include/linux/mei_hdcp.h
@@ -119,6 +119,9 @@ mei_verify_receiver_cert_prepare_km(struct mei_cl_device *cldev,
size_t *msg_sz);
int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data,
struct hdcp2_ake_send_hprime *rx_hprime);
+int mei_store_pairing_info(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_send_pairing_info *pairing_info);
#else
static inline int mei_cldev_register_notify(struct notifier_block *nb)
{
@@ -155,5 +158,12 @@ int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data,
{
return -ENODEV;
}
+static inline
+int mei_store_pairing_info(struct mei_cl_device *cldev,
+ struct mei_hdcp_data *data,
+ struct hdcp2_ake_send_pairing_info *pairing_info)
+{
+ return -ENODEV;
+}
#endif /* IS_ENABLED(CONFIG_INTEL_MEI_HDCP) */
#endif /* defined (_LINUX_MEI_HDCP_H) */
--
2.7.4
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