[PATCH v8 03/35] linux/mei: Header for mei_hdcp driver interface

[Ramalingam C <ramalingam.c@intel.com>]

Data structures and Enum for the I915-MEI_HDCP interface are defined
at <linux/mei_hdcp.h>

v2:
  Rebased.
v3:
  mei_cl_device is removed from mei_hdcp_data [Tomas]
v4:
  Comment style and typo fixed [Uma]
v5:
  Rebased.
v6:
  No changes.
v7:
  Remove redundant text from the License header
  Change uintXX_t type to uXX_t types
  Remove unneeded include to mei_cl_bus.h
  Coding style fixed [Uma]
V8:
  Tab cleanup
  Fix kdoc and namespaces
  Update MAINTAINERS

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 MAINTAINERS              |  1 +
 include/linux/mei_hdcp.h | 91 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+)
 create mode 100644 include/linux/mei_hdcp.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 1026150ae90f..2fd6555bf040 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7540,6 +7540,7 @@ L:	linux-kernel@vger.kernel.org
 S:	Supported
 F:	include/uapi/linux/mei.h
 F:	include/linux/mei_cl_bus.h
+F:	include/linux/mei_hdcp.h
 F:	drivers/misc/mei/*
 F:	drivers/watchdog/mei_wdt.c
 F:	Documentation/misc-devices/mei/*
diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h
new file mode 100644
index 000000000000..716123003dd1
--- /dev/null
+++ b/include/linux/mei_hdcp.h
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+/*
+ * Copyright © 2017-2018 Intel Corporation
+ *
+ * Authors:
+ * Ramalingam C <ramalingam.c@intel.com>
+ */
+
+#ifndef _LINUX_MEI_HDCP_H
+#define _LINUX_MEI_HDCP_H
+
+/**
+ * enum mei_hdcp_ddi - The physical digital display interface (DDI)
+ *     available on the platform
+ * @MEI_DDI_INVALID_PORT: Not a valid port
+ * @MEI_DDI_RANGE_BEGIN: Beginning of the valid DDI port range
+ * @MEI_DDI_B: Port DDI B
+ * @MEI_DDI_C: Port DDI C
+ * @MEI_DDI_D: Port DDI D
+ * @MEI_DDI_E: Port DDI E
+ * @MEI_DDI_F: Port DDI F
+ * @MEI_DDI_A: Port DDI A
+ * @MEI_DDI_RANGE_END: End of the valid DDI port range
+ */
+enum mei_hdcp_ddi {
+	MEI_DDI_INVALID_PORT = 0x00,
+
+	MEI_DDI_RANGE_BEGIN = 0x01,
+	MEI_DDI_B           = 0x01,
+	MEI_DDI_C           = 0x02,
+	MEI_DDI_D           = 0x03,
+	MEI_DDI_E           = 0x04,
+	MEI_DDI_F           = 0x05,
+	MEI_DDI_A           = 0x07,
+	MEI_DDI_RANGE_END   = MEI_DDI_A,
+};
+
+/**
+ * enum mei_hdcp_port_type - The types of HDCP 2.2 ports supported
+ *
+ * @MEI_HDCP_PORT_TYPE_INVALID: Invalid port
+ * @MEI_HDCP_PORT_TYPE_INTEGRATED: ports that are integrated into Intel HW
+ * @MEI_HDCP_PORT_TYPE_LSPCON: discrete wired Tx port with LSPCON (HDMI 2.0)
+ * @MEI_HDCP_PORT_TYPE_CPDP: discrete wired Tx port using the CPDP (DP 1.3)
+ */
+enum mei_hdcp_port_type {
+	MEI_HDCP_PORT_TYPE_INVALID    = 0x00,
+	MEI_HDCP_PORT_TYPE_INTEGRATED = 0x01,
+	MEI_HDCP_PORT_TYPE_LSPCON     = 0x02,
+	MEI_HDCP_PORT_TYPE_CPDP       = 0x03,
+};
+
+/*
+ * enum mei_hdcp_wired_protocol - Supported integrated wired HDCP protocol.
+ * @HDCP_PROTOCOL_INVALID: invalid type
+ * @HDCP_PROTOCOL_HDMI: HDMI
+ * @HDCP_PROTOCOL_DP: DP
+ *
+ * Based on this value, Minor difference needed between wired specifications
+ * are handled.
+ */
+enum mei_hdcp_wired_protocol {
+	MEI_HDCP_PROTOCOL_INVALID,
+	MEI_HDCP_PROTOCOL_HDMI,
+	MEI_HDCP_PROTOCOL_DP
+};
+
+/**
+ * struct mei_hdcp_data - Input data to the mei_hdcp APIs
+ * @port: The physical port (ddi).
+ * @port_type: The port type.
+ * @protocol: The Protocol on the port.
+ * @k: Number of streams transmitted on the port.
+ *     In case of HDMI & DP SST, a single stream will be
+ *     transmitted on the port.
+ * @seq_num_m: A sequence number of RepeaterAuth_Stream_Manage msg propagated.
+ *     Initialized to 0 on AKE_INIT. Incremented after every successful
+ *     transmission of RepeaterAuth_Stream_Manage message. When it rolls
+ *     over re-Auth has to be triggered.
+ * @streams: array[k] of streamid
+ */
+struct mei_hdcp_data {
+	enum mei_hdcp_ddi port;
+	enum mei_hdcp_port_type port_type;
+	enum mei_hdcp_wired_protocol protocol;
+	u16 k;
+	u32 seq_num_m;
+	struct hdcp2_streamid_type *streams;
+};
+
+#endif /* !_LINUX_MEI_HDCP_H */
-- 
2.7.4

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