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

[Ramalingam C]

On Wednesday 09 May 2018 07:32 PM, Shankar, Uma wrote:
>
>> -----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.
Thank you for catching it.

--Ram
>
>> + *	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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