diff options
| author | Ramalingam C <ramalingam.c@intel.com> | 2019-02-21 23:42:02 +0530 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2019-02-25 17:02:20 +0100 |
| commit | 682932f3e144a09759facfc5d8fe186760b01f89 (patch) | |
| tree | 5fa35ff510d92168b8fd4151d98babb8491615c1 /drivers/misc | |
| parent | 6a1a00a30e3a41c8e9a9fc78a6153608f326114d (diff) | |
misc/mei/hdcp: Initiate Locality check
Requests ME to start the second stage of HDCP2.2 authentication,
called Locality Check.
On Success, ME FW will provide LC_Init message to send to hdcp sink.
v2: Rebased.
v3:
cldev is passed as first parameter [Tomas]
Redundant comments and cast are removed [Tomas]
v4:
%zd used for ssize_t [Alexander]
%s/return -1/return -EIO [Alexander]
Style fixed [Uma]
v5: Rebased.
v6:
Collected the Rb-ed by.
Rebasing.
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/1550772730-23280-9-git-send-email-ramalingam.c@intel.com
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/hdcp/mei_hdcp.c | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index d5fbb2dbba60..7c880efe9134 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -296,6 +296,61 @@ mei_hdcp_store_pairing_info(struct device *dev, struct hdcp_port_data *data, return 0; } +/** + * mei_hdcp_initiate_locality_check() - Prepare LC_Init + * @dev: device corresponding to the mei_cl_device + * @data: Intel HW specific hdcp data + * @lc_init_data: LC_Init msg output + * + * Return: 0 on Success, <0 on Failure + */ +static int +mei_hdcp_initiate_locality_check(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_lc_init *lc_init_data) +{ + struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } }; + struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } }; + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !data || !lc_init_data) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + lc_init_in.header.api_version = HDCP_API_VERSION; + lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK; + lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS; + lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN; + + lc_init_in.port.integrated_port_type = data->port_type; + lc_init_in.port.physical_port = mei_get_ddi_index(data->port); + + byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&lc_init_out, sizeof(lc_init_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (lc_init_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X Failed. status: 0x%X\n", + WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status); + return -EIO; + } + + lc_init_data->msg_id = HDCP_2_2_LC_INIT; + memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN); + + return 0; +} + static const __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -304,7 +359,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { mei_hdcp_verify_receiver_cert_prepare_km, .verify_hprime = mei_hdcp_verify_hprime, .store_pairing_info = mei_hdcp_store_pairing_info, - .initiate_locality_check = NULL, + .initiate_locality_check = mei_hdcp_initiate_locality_check, .verify_lprime = NULL, .get_session_key = NULL, .repeater_check_flow_prepare_ack = NULL, |