>-----Original Message-----
>From: C, Ramalingam
>Sent: Saturday, July 14, 2018 8:45 AM
>To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
>daniel@xxxxxxxx; seanpaul@xxxxxxxxxxxx; Winkler, Tomas
><tomas.winkler@xxxxxxxxx>; Usyskin, Alexander <alexander.usyskin@xxxxxxxxx>;
>Shankar, Uma <uma.shankar@xxxxxxxxx>
>Cc: Sharma, Shashank <shashank.sharma@xxxxxxxxx>; C, Ramalingam
><ramalingam.c@xxxxxxxxx>
>Subject: [PATCH v6 34/35] misc/mei/hdcp: Enabling the HDCP authentication
>
>Request to ME to configure a port as authenticated.
>
>On Success, ME FW will mark the port as authenticated and provides HDCP cipher
>with the encryption keys.
>
>Enabling the Authentication can be requested once all stages of
>HDCP2.2 authentication is completed by interacting with ME FW.
>
>Only after this stage, driver can enable the HDCP encryption for the port, through
>HW registers.
>
>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 and typos fixed [Uma]
>v5:
> Rebased.
>v6:
> No change.
>
Looks ok to me.
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
>Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
>---
> 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 7841fe94a96f..fdfdfb1724ec 100644
>--- a/drivers/misc/mei/hdcp/mei_hdcp.c
>+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
>@@ -624,6 +624,60 @@ static int mei_verify_mprime(struct mei_cl_device
>*cldev,
> return 0;
> }
>
>+/*
>+ * mei_enable_hdcp_authentication:
>+ * Function to request ME FW to mark a port as authenticated.
>+ *
>+ * cldev : Pointer for mei client device
>+ * data : Intel HW specific Data
>+ *
>+ * Returns 0 on Success, <0 on Failure
>+ */
>+static int mei_enable_hdcp_authentication(struct mei_cl_device *cldev,
>+ struct mei_hdcp_data *data)
>+{
>+ struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } };
>+ struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } };
>+ struct device *dev;
>+ ssize_t byte;
>+
>+ if (!data)
>+ return -EINVAL;
>+
>+ dev = &cldev->dev;
>+
>+ enable_auth_in.header.api_version = HDCP_API_VERSION;
>+ enable_auth_in.header.command_id = WIRED_ENABLE_AUTH;
>+ enable_auth_in.header.status = ME_HDCP_STATUS_SUCCESS;
>+ enable_auth_in.header.buffer_len =
>WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN;
>+
>+ enable_auth_in.port.integrated_port_type = data->port_type;
>+ enable_auth_in.port.physical_port = data->port;
>+ enable_auth_in.stream_type = data->streams[0].stream_type;
>+
>+ byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in,
>+ sizeof(enable_auth_in));
>+ if (byte < 0) {
>+ dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
>+ return byte;
>+ }
>+
>+ byte = mei_cldev_recv(cldev, (u8 *)&enable_auth_out,
>+ sizeof(enable_auth_out));
>+ if (byte < 0) {
>+ dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
>+ return byte;
>+ }
>+
>+ if (enable_auth_out.header.status != ME_HDCP_STATUS_SUCCESS) {
>+ dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n",
>+ WIRED_ENABLE_AUTH,
>enable_auth_out.header.status);
>+ return -EIO;
>+ }
>+
>+ return 0;
>+}
>+
> struct i915_hdcp_component_ops mei_hdcp_component_ops = {
> .owner = THIS_MODULE,
> .initiate_hdcp2_session = mei_initiate_hdcp2_session,
>@@ -637,7 +691,8 @@ struct i915_hdcp_component_ops
>mei_hdcp_component_ops = {
> .repeater_check_flow_prepare_ack =
>
> mei_repeater_check_flow_prepare_ack,
> .verify_mprime = mei_verify_mprime,
>- .enable_hdcp_authentication = NULL,
>+ .enable_hdcp_authentication =
>+ mei_enable_hdcp_authentication,
> .close_hdcp_session = NULL,
> };
>
>--
>2.7.4
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