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firmware: qcom: scm: Add HDCP Support 

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 <jilaiw@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
This commit is contained in:
jilai wang 2015-04-10 16:15:59 -04:00 committed by Kumar Gala
parent b6a1dfbc7d
commit 9626b6993b
4 changed files with 77 additions and 4 deletions
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25
drivers/firmware/qcom_scm-32.c
View File

@ -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
@ -478,3 +478,26 @@ void __qcom_scm_cpu_power_down(u32 flags)
qcom_scm_call_atomic1(QCOM_SCM_SVC_BOOT, QCOM_SCM_CMD_TERMINATE_PC,
flags & QCOM_SCM_FLUSH_FLAG_MASK);
}
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;
}
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));
}

32
drivers/firmware/qcom_scm.c
View File

@ -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
@ -64,3 +64,33 @@ void qcom_scm_cpu_power_down(u32 flags)
__qcom_scm_cpu_power_down(flags);
}
EXPORT_SYMBOL(qcom_scm_cpu_power_down);
/**
* 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;
}
EXPORT_SYMBOL(qcom_scm_hdcp_available);
/**
* 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)
{
return __qcom_scm_hdcp_req(req, req_cnt, resp);
}
EXPORT_SYMBOL(qcom_scm_hdcp_req);

11
drivers/firmware/qcom_scm.h
View File

@ -1,4 +1,4 @@
/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
/* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -27,6 +27,15 @@ extern int __qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
#define QCOM_SCM_CMD_CORE_HOTPLUGGED 0x10
extern void __qcom_scm_cpu_power_down(u32 flags);
#define QCOM_SCM_SVC_INFO 0x6
#define QCOM_IS_CALL_AVAIL_CMD 0x1
extern int __qcom_scm_is_call_available(u32 svc_id, u32 cmd_id);
#define QCOM_SCM_SVC_HDCP 0x11
#define QCOM_SCM_CMD_HDCP 0x01
extern int __qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
u32 *resp);
/* common error codes */
#define QCOM_SCM_ENOMEM -5
#define QCOM_SCM_EOPNOTSUPP -4

13
include/linux/qcom_scm.h
View File

@ -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