RE: [PATCH v6 25/35] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

-----Original Message----- From: C, Ramalingam Sent: Saturday, July 14, 2018 8:45 AM To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; daniel@ffwll.ch; seanpaul@chromium.org; Winkler, Tomas tomas.winkler@intel.com; Usyskin, Alexander alexander.usyskin@intel.com; Shankar, Uma uma.shankar@intel.com Cc: Sharma, Shashank shashank.sharma@intel.com; C, Ramalingam ramalingam.c@intel.com Subject: [PATCH v6 25/35] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session

Request ME FW to start the HDCP2.2 session for an intel port. Prepares payloads for command WIRED_INITIATE_HDCP2_SESSION and sends to ME FW.

On Success, ME FW will start a HDCP2.2 session for the port and provides the content for HDCP2.2 AKE_Init message.

v2: Rebased. v3: cldev is add as a separate parameter [Tomas] Redundant comment and typecast are removed [Tomas] v4: %zd is used for size [Alexander] %s/return -1/return -EIO [Alexander] Spellings in commit msg is fixed [Uma] v5: Rebased. v6: No change.

Looks ok to me. Reviewed-by: Uma Shankar uma.shankar@intel.com

Signed-off-by: Ramalingam C ramalingam.c@intel.com

drivers/misc/mei/hdcp/mei_hdcp.c | 70 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 69 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index adfb14a2ea4f..44b1aac03ff0 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -32,14 +32,82 @@ #include <linux/uuid.h> #include <linux/mei_cl_bus.h> #include <linux/component.h> +#include <linux/mei_hdcp.h> #include <drm/i915_component.h> +#include <drm/drm_connector.h>

+#include "mei_hdcp.h"

bool mei_hdcp_component_registered; static struct mei_cl_device *mei_cldev;

+/*

• • mei_initiate_hdcp2_session:
• • Function to start a Wired HDCP2.2 Tx Session with ME FW
• • cldev : Pointer for mei client device
• • data : Intel HW specific Data
• • ake_data : ptr to store AKE_Init
• • Returns 0 on Success, <0 on Failure.
• */

+static int mei_initiate_hdcp2_session(struct mei_cl_device *cldev,

• 		      struct mei_hdcp_data *data,
  

• 		      struct hdcp2_ake_init *ake_data) {
  

• struct wired_cmd_initiate_hdcp2_session_in session_init_in = { { 0 } };
• struct wired_cmd_initiate_hdcp2_session_out

• 				session_init_out = { { 0 } };
  

• struct device *dev;
• ssize_t byte;
• if (!data || !ake_data)

• return -EINVAL;
  

• dev = &cldev->dev;
• session_init_in.header.api_version = HDCP_API_VERSION;
• session_init_in.header.command_id =

WIRED_INITIATE_HDCP2_SESSION;

• session_init_in.header.status = ME_HDCP_STATUS_SUCCESS;
• session_init_in.header.buffer_len =
• WIRED_CMD_BUF_LEN_INITIATE_HDCP2_SESSION_IN;
• session_init_in.port.integrated_port_type = data->port_type;
• session_init_in.port.physical_port = data->port;
• session_init_in.protocol = (uint8_t)data->protocol;
• byte = mei_cldev_send(cldev, (u8 *)&session_init_in,

• 	      sizeof(session_init_in));
  

• if (byte < 0) {

• dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
  

• return byte;
  

• }
• byte = mei_cldev_recv(cldev, (u8 *)&session_init_out,

• 	      sizeof(session_init_out));
  

• if (byte < 0) {

• dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte);
  

• return byte;
  

• }
• if (session_init_out.header.status != ME_HDCP_STATUS_SUCCESS) {

• dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n",
  

• 	WIRED_INITIATE_HDCP2_SESSION,
  

• 	session_init_out.header.status);
  

• return -EIO;
  

• }
• ake_data->msg_id = HDCP_2_2_AKE_INIT;
• ake_data->tx_caps = session_init_out.tx_caps;
• memcpy(ake_data->r_tx, session_init_out.r_tx,

•       sizeof(session_init_out.r_tx));
  

• return 0;

+}

struct i915_hdcp_component_ops mei_hdcp_component_ops = { .owner = THIS_MODULE,

• .initiate_hdcp2_session = NULL,

• .initiate_hdcp2_session = mei_initiate_hdcp2_session, .verify_receiver_cert_prepare_km = NULL, .verify_hprime = NULL, .store_pairing_info = NULL,

-- 2.7.4