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Commit 9626b699 authored by jilai wang's avatar jilai wang Committed by Kumar Gala
Browse files

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: default avatarJilai Wang <jilaiw@codeaurora.org>
Signed-off-by: default avatarKumar Gala <galak@codeaurora.org>
parent b6a1dfbc

drivers/firmware/qcom_scm-32.c

+24 −1
Original line number Diff line number Diff line 
/* 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));

}

drivers/firmware/qcom_scm.c

+31 −1
Original line number Diff line number Diff line 
/* 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);

drivers/firmware/qcom_scm.h

+10 −1
Original line number Diff line number Diff line 
/* 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

include/linux/qcom_scm.h

+12 −1
Original line number Diff line number Diff line 
/* 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