From patchwork Mon May 21 12:53:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10415143 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 61E3E600CC for ; Mon, 21 May 2018 13:03:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 53AC61FE82 for ; Mon, 21 May 2018 13:03:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 489D0287A7; Mon, 21 May 2018 13:03:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id EDBC61FE82 for ; Mon, 21 May 2018 13:03:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0FE4C6E3DE; Mon, 21 May 2018 13:02:51 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8281F6F0B3; Mon, 21 May 2018 13:02:46 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 May 2018 06:02:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,426,1520924400"; d="scan'208";a="40968286" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga007.fm.intel.com with ESMTP; 21 May 2018 06:02:41 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 21 May 2018 18:23:27 +0530 Message-Id: <1526907240-17639-9-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526907240-17639-1-git-send-email-ramalingam.c@intel.com> References: <1526907240-17639-1-git-send-email-ramalingam.c@intel.com> Subject: [Intel-gfx] [PATCH v4 08/41] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexander.usyskin@intel.com, tomas.winkler@intel.com MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP 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] Signed-off-by: Ramalingam C --- drivers/misc/mei/hdcp/mei_hdcp.c | 68 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 11 +++++++ 2 files changed, 79 insertions(+) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 0b4e85511a25..be33906a68c1 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -33,10 +33,78 @@ #include #include #include +#include + +#include "mei_hdcp.h" static struct mei_cl_device *mei_cldev; static BLOCKING_NOTIFIER_HEAD(mei_cldev_notifier_list); +/* + * 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. + */ +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; +} +EXPORT_SYMBOL(mei_initiate_hdcp2_session); + static void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled) { diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index c8a8c12782d2..841ab8ffc302 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -28,6 +28,7 @@ #define _LINUX_MEI_HDCP_H #include +#include enum mei_cldev_state { MEI_CLDEV_DISABLED, @@ -106,6 +107,9 @@ struct mei_hdcp_data { int mei_cldev_register_notify(struct notifier_block *nb); int mei_cldev_unregister_notify(struct notifier_block *nb); int mei_cldev_poll_notification(void); +int mei_initiate_hdcp2_session(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_ake_init *ake_data); #else static inline int mei_cldev_register_notify(struct notifier_block *nb) { @@ -119,5 +123,12 @@ static inline int mei_cldev_poll_notification(void) { return -ENODEV; } +static inline +int mei_initiate_hdcp2_session(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_ake_init *ake_data) +{ + return -ENODEV; +} #endif /* IS_ENABLED(CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */