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>

1 files changed, 24 insertions, 1 deletions

diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
index b08b822ebafa..1bd6f9c34331 100644
--- a/drivers/firmware/qcom_scm-32.c
+++ b/drivers/firmware/qcom_scm-32.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
@@ -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));
+}