Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752597AbbDBWHI (ORCPT ); Thu, 2 Apr 2015 18:07:08 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:38287 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751879AbbDBWHF (ORCPT ); Thu, 2 Apr 2015 18:07:05 -0400 From: Jilai Wang To: galak@codeaurora.org Cc: sboyd@codeauraro.org, lina.iyer@linaro.org, davidb@codeaurora.org, agross@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, robdclark@gmail.com, Jilai Wang Subject: [PATCH] firmware: qcom: scm: Add HDCP Support Date: Thu, 2 Apr 2015 18:06:16 -0400 Message-Id: <1428012376-24545-1-git-send-email-jilaiw@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3815 Lines: 121 HDCP driver needs to check if secure environment supports HDCP. If it's supported, then it requires to program some registers through SCM. Add qcom_scm_hdcp_available and qcom_scm_hdcp_req to support these requirements. Signed-off-by: Jilai Wang --- drivers/firmware/qcom_scm.c | 60 ++++++++++++++++++++++++++++++++++++++++++++- include/linux/qcom_scm.h | 13 +++++++++- 2 files changed, 71 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 994b50f..31fa666 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. +/* Copyright (c) 2010,2015, The Linux Foundation. All rights reserved. * Copyright (C) 2015 Linaro Ltd. * * This program is free software; you can redistribute it and/or modify @@ -492,3 +492,61 @@ void qcom_scm_cpu_power_down(u32 flags) flags & QCOM_SCM_FLUSH_FLAG_MASK); } EXPORT_SYMBOL(qcom_scm_cpu_power_down); + +#define QCOM_SCM_SVC_INFO 0x6 +#define QCOM_IS_CALL_AVAIL_CMD 0x1 +/** + * qcom_scm_is_call_available() - Query if service/command is available + * @svc_id - serivice ID + * @cmd_id - command ID + * + * Query the secure environment about the availability of a particular + * service/command. + */ +static int qcom_scm_is_call_available(u32 svc_id, u32 cmd_id) +{ + int ret; + u32 svc_cmd = (svc_id << 10) | cmd_id; + u32 ret_val = 0; + + ret = qcom_scm_call(QCOM_SCM_SVC_INFO, QCOM_IS_CALL_AVAIL_CMD, &svc_cmd, + sizeof(svc_cmd), &ret_val, sizeof(ret_val)); + if (ret) + return ret; + + return ret_val; +} + +#define QCOM_SCM_SVC_HDCP 0x11 +#define QCOM_SCM_CMD_HDCP 0x01 +/** + * qcom_scm_hdcp_available() - Check if secure environment supports HDCP. + * + * Return true if HDCP is supported, false if not. + */ +bool qcom_scm_hdcp_available(void) +{ + int ret; + + ret = qcom_scm_is_call_available(QCOM_SCM_SVC_HDCP, QCOM_SCM_CMD_HDCP); + + return (ret > 0) ? true : false; +} + +/** + * qcom_scm_hdcp_req() - Send HDCP request. + * @req: HDCP request array + * @req_cnt: HDCP request array count + * @resp: response buffer passed to SCM + * + * Write HDCP register(s) through SCM. + */ +int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp) +{ + if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT) + return -ERANGE; + + return qcom_scm_call(QCOM_SCM_SVC_HDCP, QCOM_SCM_CMD_HDCP, + req, req_cnt * sizeof(*req), resp, sizeof(*resp)); +} +EXPORT_SYMBOL(qcom_scm_hdcp_req); diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h index d7a974d..6e7d5ec 100644 --- a/include/linux/qcom_scm.h +++ b/include/linux/qcom_scm.h @@ -1,4 +1,4 @@ -/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved. +/* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved. * Copyright (C) 2015 Linaro Ltd. * * This program is free software; you can redistribute it and/or modify @@ -16,6 +16,17 @@ extern int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus); extern int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus); +#define QCOM_SCM_HDCP_MAX_REQ_CNT 5 + +struct qcom_scm_hdcp_req { + u32 addr; + u32 val; +}; + +extern bool qcom_scm_hdcp_available(void); +extern int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, + u32 *resp); + #define QCOM_SCM_CPU_PWR_DOWN_L2_ON 0x0 #define QCOM_SCM_CPU_PWR_DOWN_L2_OFF 0x1 -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/