[Intel-gfx] [PATCH v3 18/40] misc/mei/hdcp: Closing wired HDCP2.2 Tx Session

[Shankar, Uma]

>-----Original Message-----
>From: Intel-gfx [mailto:intel-gfx-bounces at lists.freedesktop.org] On Behalf Of
>Ramalingam C
>Sent: Tuesday, April 3, 2018 7:28 PM
>To: intel-gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org;
>seanpaul at chromium.org; daniel at ffwll.ch; chris at chris-wilson.co.uk;
>jani.nikula at linux.intel.com; Winkler, Tomas <tomas.winkler at intel.com>;
>Usyskin, Alexander <alexander.usyskin at intel.com>
>Cc: Vivi, Rodrigo <rodrigo.vivi at intel.com>
>Subject: [Intel-gfx] [PATCH v3 18/40] misc/mei/hdcp: Closing wired HDCP2.2 Tx
>Session
>
>Request the ME to terminate the HDCP2.2 session for a port.
>
>On Success, ME FW will mark the intel port as Deauthenticated and terminate the
>wired HDCP2.2 Tx session started due to the cmd
>WIRED_INITIATE_HDCP2_SESSION.
>
>v2:
>  Rebased.
>v3:
>  cldev is passed as first parameter [Tomas]
>  Redundant comments and cast are removed [Tomas]
>
>Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
>---
> drivers/misc/mei/hdcp/mei_hdcp.c | 55
>++++++++++++++++++++++++++++++++++++++++
> include/linux/mei_hdcp.h         |  7 +++++
> 2 files changed, 62 insertions(+)
>
>diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c
>b/drivers/misc/mei/hdcp/mei_hdcp.c
>index b5d1da41f1d9..ed402f1f2f64 100644
>--- a/drivers/misc/mei/hdcp/mei_hdcp.c
>+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
>@@ -686,6 +686,61 @@ int mei_enable_hdcp_authentication(struct
>mei_cl_device *cldev,  }  EXPORT_SYMBOL(mei_enable_hdcp_authentication);
>
>+/**
>+ * me_close_hdcp_session:

Typo in me. Should be mei.

>+ *	Function to close the Wired HDCP Tx session of ME FW.
>+ *	This also disables the authenticated state of the port.
>+ *
>+ * @data		: Intel HW specific Data
>+ *
>+ * Returns 0 on Success, <0 on Failure
>+ */
>+int mei_close_hdcp_session(struct mei_cl_device *cldev,
>+			   struct mei_hdcp_data *data)
>+{
>+	struct wired_cmd_close_session_in session_close_in = { { 0 } };
>+	struct wired_cmd_close_session_out session_close_out = { { 0 } };
>+	struct device *dev;
>+	ssize_t byte;
>+
>+	if (!data)
>+		return -EINVAL;
>+
>+	dev = &cldev->dev;
>+
>+	session_close_in.header.api_version = HDCP_API_VERSION;
>+	session_close_in.header.command_id = WIRED_CLOSE_SESSION;
>+	session_close_in.header.status = ME_HDCP_STATUS_SUCCESS;
>+	session_close_in.header.buffer_len =
>+				WIRED_CMD_BUF_LEN_CLOSE_SESSION_IN;
>+
>+	session_close_in.port.integrated_port_type = data->port_type;
>+	session_close_in.port.physical_port = data->port;
>+
>+
>+	byte = mei_cldev_send(cldev, (u8 *)&session_close_in,
>+			      sizeof(session_close_in));
>+	if (byte < 0) {
>+		dev_dbg(dev, "mei_cldev_send failed. %d\n", (int)byte);
>+		return byte;
>+	}
>+
>+	byte = mei_cldev_recv(cldev, (u8 *)&session_close_out,
>+			      sizeof(session_close_out));
>+	if (byte < 0) {
>+		dev_dbg(dev, "mei_cldev_recv failed. %d\n", (int)byte);
>+		return byte;
>+	}
>+
>+	if (session_close_out.header.status != ME_HDCP_STATUS_SUCCESS) {
>+		dev_dbg(dev, "Session Close Failed. status: 0x%X\n",
>+			session_close_out.header.status);
>+		return -1;
>+	}
>+	return 0;
>+}
>+EXPORT_SYMBOL(mei_close_hdcp_session);
>+
> void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled)  {
> 	if (enabled)
>diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index
>2366d0741abe..55cbde890571 100644
>--- a/include/linux/mei_hdcp.h
>+++ b/include/linux/mei_hdcp.h
>@@ -138,6 +138,8 @@ int mei_verify_mprime(struct mei_cl_device *cldev,
>struct mei_hdcp_data *data,
> 		      struct hdcp2_rep_stream_ready *stream_ready);  int
>mei_enable_hdcp_authentication(struct mei_cl_device *cldev,
> 				   struct mei_hdcp_data *data);
>+int mei_close_hdcp_session(struct mei_cl_device *cldev,
>+			   struct mei_hdcp_data *data);
> #else
> static int mei_cldev_register_notify(struct notifier_block *nb)  { @@ -216,5
>+218,10 @@ static inline int mei_enable_hdcp_authentication(struct
>mei_cl_device *cldev,  {
> 	return -ENODEV;
> }
>+static inline int mei_close_hdcp_session(struct mei_cl_device *cldev,
>+					 struct mei_hdcp_data *data)
>+{
>+	return -ENODEV;
>+}
> #endif /* defined (CONFIG_INTEL_MEI_HDCP) */  #endif /* defined
>(_LINUX_MEI_HDCP_H) */
>--
>2.7.4
>
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