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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]
v4:
  %zd for ssize_t [Alexander]
  %s/return -1/return -EIO [Alexander]
  Style and typos fixed [Uma]
v5:
  Extra line is removed.
v6:
  Collected the Rb-ed by.
  Rebased.
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]
v10:
  K-Doc fix. [Tomas]
v11:
  Rebased.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1550772730-23280-15-git-send-email-ramalingam.c@intel.com
hifive-unleashed-5.1
Ramalingam C 2019-02-21 23:42:08 +05:30 committed by Daniel Vetter
parent 5e23491175
commit 62c2b3221f
1 changed files with 54 additions and 1 deletions
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55
drivers/misc/mei/hdcp/mei_hdcp.c
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@ -658,6 +658,59 @@ static int mei_hdcp_enable_authentication(struct device *dev,
return 0;
}
/**
* mei_hdcp_close_session() - Close the Wired HDCP Tx session of ME FW per port.
* This also disables the authenticated state of the port.
* @dev: device corresponding to the mei_cl_device
* @data: Intel HW specific hdcp data
*
* Return: 0 on Success, <0 on Failure
*/
static int
mei_hdcp_close_session(struct device *dev, struct hdcp_port_data *data)
{
struct wired_cmd_close_session_in session_close_in = { { 0 } };
struct wired_cmd_close_session_out session_close_out = { { 0 } };
struct mei_cl_device *cldev;
ssize_t byte;
if (!dev || !data)
return -EINVAL;
cldev = to_mei_cl_device(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 = mei_get_ddi_index(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. %zd\n", 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. %zd\n", 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 -EIO;
}
return 0;
}
static const __attribute__((unused))
struct i915_hdcp_component_ops mei_hdcp_ops = {
.owner = THIS_MODULE,
@ -673,7 +726,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = {
mei_hdcp_repeater_check_flow_prepare_ack,
.verify_mprime = mei_hdcp_verify_mprime,
.enable_hdcp_authentication = mei_hdcp_enable_authentication,
.close_hdcp_session = NULL,
.close_hdcp_session = mei_hdcp_close_session,
};
static int mei_hdcp_probe(struct mei_cl_device *cldev,