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>
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 9989241..45c008d 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
@@ -64,3 +64,33 @@
__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);