include/drm/drm_hdcp.h - linux - Git at Google

 /* SPDX-License-Identifier: MIT */
 /*
  * Copyright (C) 2017 Google, Inc.
  *
  * Authors:
  * Sean Paul <seanpaul@chromium.org>
  */

 #ifndef _DRM_HDCP_H_INCLUDED_
 #define _DRM_HDCP_H_INCLUDED_

 #include <linux/types.h>

 /* Period of hdcp checks (to ensure we're still authenticated) */
 #define DRM_HDCP_CHECK_PERIOD_MS		(128 * 16)
 #define DRM_HDCP2_CHECK_PERIOD_MS		500

 /* Shared lengths/masks between HDMI/DVI/DisplayPort */
 #define DRM_HDCP_AN_LEN				8
 #define DRM_HDCP_BSTATUS_LEN			2
 #define DRM_HDCP_KSV_LEN			5
 #define DRM_HDCP_RI_LEN				2
 #define DRM_HDCP_V_PRIME_PART_LEN		4
 #define DRM_HDCP_V_PRIME_NUM_PARTS		5
 #define DRM_HDCP_NUM_DOWNSTREAM(x)		(x & 0x7f)
 #define DRM_HDCP_MAX_CASCADE_EXCEEDED(x)	(x & BIT(3))
 #define DRM_HDCP_MAX_DEVICE_EXCEEDED(x)		(x & BIT(7))

 /* Slave address for the HDCP registers in the receiver */
 #define DRM_HDCP_DDC_ADDR			0x3A

 /* HDCP register offsets for HDMI/DVI devices */
 #define DRM_HDCP_DDC_BKSV			0x00
 #define DRM_HDCP_DDC_RI_PRIME			0x08
 #define DRM_HDCP_DDC_AKSV			0x10
 #define DRM_HDCP_DDC_AN				0x18
 #define DRM_HDCP_DDC_V_PRIME(h)			(0x20 + h * 4)
 #define DRM_HDCP_DDC_BCAPS			0x40
 #define  DRM_HDCP_DDC_BCAPS_REPEATER_PRESENT	BIT(6)
 #define  DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY	BIT(5)
 #define DRM_HDCP_DDC_BSTATUS			0x41
 #define DRM_HDCP_DDC_KSV_FIFO			0x43

 #define DRM_HDCP_1_4_SRM_ID			0x8
 #define DRM_HDCP_1_4_VRL_LENGTH_SIZE		3
 #define DRM_HDCP_1_4_DCP_SIG_SIZE		40

 /* Protocol message definition for HDCP2.2 specification */
 /*
  * Protected content streams are classified into 2 types:
  * - Type0: Can be transmitted with HDCP 1.4+
  * - Type1: Can be transmitted with HDCP 2.2+
  */
 #define HDCP_STREAM_TYPE0			0x00
 #define HDCP_STREAM_TYPE1			0x01

 /* HDCP2.2 Msg IDs */
 #define HDCP_2_2_NULL_MSG			1
 #define HDCP_2_2_AKE_INIT			2
 #define HDCP_2_2_AKE_SEND_CERT			3
 #define HDCP_2_2_AKE_NO_STORED_KM		4
 #define HDCP_2_2_AKE_STORED_KM			5
 #define HDCP_2_2_AKE_SEND_HPRIME		7
 #define HDCP_2_2_AKE_SEND_PAIRING_INFO		8
 #define HDCP_2_2_LC_INIT			9
 #define HDCP_2_2_LC_SEND_LPRIME			10
 #define HDCP_2_2_SKE_SEND_EKS			11
 #define HDCP_2_2_REP_SEND_RECVID_LIST		12
 #define HDCP_2_2_REP_SEND_ACK			15
 #define HDCP_2_2_REP_STREAM_MANAGE		16
 #define HDCP_2_2_REP_STREAM_READY		17

 #define HDCP_2_2_RTX_LEN			8
 #define HDCP_2_2_RRX_LEN			8

 #define HDCP_2_2_K_PUB_RX_MOD_N_LEN		128
 #define HDCP_2_2_K_PUB_RX_EXP_E_LEN		3
 #define HDCP_2_2_K_PUB_RX_LEN			(HDCP_2_2_K_PUB_RX_MOD_N_LEN + \
 						 HDCP_2_2_K_PUB_RX_EXP_E_LEN)

 #define HDCP_2_2_DCP_LLC_SIG_LEN		384

 #define HDCP_2_2_E_KPUB_KM_LEN			128
 #define HDCP_2_2_E_KH_KM_M_LEN			(16 + 16)
 #define HDCP_2_2_H_PRIME_LEN			32
 #define HDCP_2_2_E_KH_KM_LEN			16
 #define HDCP_2_2_RN_LEN				8
 #define HDCP_2_2_L_PRIME_LEN			32
 #define HDCP_2_2_E_DKEY_KS_LEN			16
 #define HDCP_2_2_RIV_LEN			8
 #define HDCP_2_2_SEQ_NUM_LEN			3
 #define HDCP_2_2_V_PRIME_HALF_LEN		(HDCP_2_2_L_PRIME_LEN / 2)
 #define HDCP_2_2_RECEIVER_ID_LEN		DRM_HDCP_KSV_LEN
 #define HDCP_2_2_MAX_DEVICE_COUNT		31
 #define HDCP_2_2_RECEIVER_IDS_MAX_LEN		(HDCP_2_2_RECEIVER_ID_LEN * \
 						 HDCP_2_2_MAX_DEVICE_COUNT)
 #define HDCP_2_2_MPRIME_LEN			32

 /* Following Macros take a byte at a time for bit(s) masking */
 /*
  * TODO: This has to be changed for DP MST, as multiple stream on
  * same port is possible.
  * For HDCP2.2 on HDMI and DP SST this value is always 1.
  */
 #define HDCP_2_2_MAX_CONTENT_STREAMS_CNT	1
 #define HDCP_2_2_TXCAP_MASK_LEN			2
 #define HDCP_2_2_RXCAPS_LEN			3
 #define HDCP_2_2_RX_REPEATER(x)			((x) & BIT(0))
 #define HDCP_2_2_DP_HDCP_CAPABLE(x)		((x) & BIT(1))
 #define HDCP_2_2_RXINFO_LEN			2

 /* HDCP1.x compliant device in downstream */
 #define HDCP_2_2_HDCP1_DEVICE_CONNECTED(x)	((x) & BIT(0))

 /* HDCP2.0 Compliant repeater in downstream */
 #define HDCP_2_2_HDCP_2_0_REP_CONNECTED(x)	((x) & BIT(1))
 #define HDCP_2_2_MAX_CASCADE_EXCEEDED(x)	((x) & BIT(2))
 #define HDCP_2_2_MAX_DEVS_EXCEEDED(x)		((x) & BIT(3))
 #define HDCP_2_2_DEV_COUNT_LO(x)		(((x) & (0xF << 4)) >> 4)
 #define HDCP_2_2_DEV_COUNT_HI(x)		((x) & BIT(0))
 #define HDCP_2_2_DEPTH(x)			(((x) & (0x7 << 1)) >> 1)

 struct hdcp2_cert_rx {
 	u8	receiver_id[HDCP_2_2_RECEIVER_ID_LEN];
 	u8	kpub_rx[HDCP_2_2_K_PUB_RX_LEN];
 	u8	reserved[2];
 	u8	dcp_signature[HDCP_2_2_DCP_LLC_SIG_LEN];
 } __packed;

 struct hdcp2_streamid_type {
 	u8	stream_id;
 	u8	stream_type;
 } __packed;

 /*
  * The TxCaps field specified in the HDCP HDMI, DP specs
  * This field is big endian as specified in the errata.
  */
 struct hdcp2_tx_caps {
 	/* Transmitter must set this to 0x2 */
 	u8	version;

 	/* Reserved for HDCP and DP Spec. Read as Zero */
 	u8	tx_cap_mask[HDCP_2_2_TXCAP_MASK_LEN];
 } __packed;

 /* Main structures for HDCP2.2 protocol communication */
 struct hdcp2_ake_init {
 	u8			msg_id;
 	u8			r_tx[HDCP_2_2_RTX_LEN];
 	struct hdcp2_tx_caps	tx_caps;
 } __packed;

 struct hdcp2_ake_send_cert {
 	u8			msg_id;
 	struct hdcp2_cert_rx	cert_rx;
 	u8			r_rx[HDCP_2_2_RRX_LEN];
 	u8			rx_caps[HDCP_2_2_RXCAPS_LEN];
 } __packed;

 struct hdcp2_ake_no_stored_km {
 	u8	msg_id;
 	u8	e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
 } __packed;

 struct hdcp2_ake_stored_km {
 	u8	msg_id;
 	u8	e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
 } __packed;

 struct hdcp2_ake_send_hprime {
 	u8	msg_id;
 	u8	h_prime[HDCP_2_2_H_PRIME_LEN];
 } __packed;

 struct hdcp2_ake_send_pairing_info {
 	u8	msg_id;
 	u8	e_kh_km[HDCP_2_2_E_KH_KM_LEN];
 } __packed;

 struct hdcp2_lc_init {
 	u8	msg_id;
 	u8	r_n[HDCP_2_2_RN_LEN];
 } __packed;

 struct hdcp2_lc_send_lprime {
 	u8	msg_id;
 	u8	l_prime[HDCP_2_2_L_PRIME_LEN];
 } __packed;

 struct hdcp2_ske_send_eks {
 	u8	msg_id;
 	u8	e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
 	u8	riv[HDCP_2_2_RIV_LEN];
 } __packed;

 struct hdcp2_rep_send_receiverid_list {
 	u8	msg_id;
 	u8	rx_info[HDCP_2_2_RXINFO_LEN];
 	u8	seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
 	u8	v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
 	u8	receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
 } __packed;

 struct hdcp2_rep_send_ack {
 	u8	msg_id;
 	u8	v[HDCP_2_2_V_PRIME_HALF_LEN];
 } __packed;

 struct hdcp2_rep_stream_manage {
 	u8			msg_id;
 	u8			seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
 	__be16			k;
 	struct hdcp2_streamid_type streams[HDCP_2_2_MAX_CONTENT_STREAMS_CNT];
 } __packed;

 struct hdcp2_rep_stream_ready {
 	u8	msg_id;
 	u8	m_prime[HDCP_2_2_MPRIME_LEN];
 } __packed;

 /* HDCP2.2 TIMEOUTs in mSec */
 #define HDCP_2_2_CERT_TIMEOUT_MS		100
 #define HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS	1000
 #define HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS	200
 #define HDCP_2_2_PAIRING_TIMEOUT_MS		200
 #define	HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS		20
 #define HDCP_2_2_DP_LPRIME_TIMEOUT_MS		7
 #define HDCP_2_2_RECVID_LIST_TIMEOUT_MS		3000
 #define HDCP_2_2_STREAM_READY_TIMEOUT_MS	100

 /* HDMI HDCP2.2 Register Offsets */
 #define HDCP_2_2_HDMI_REG_VER_OFFSET		0x50
 #define HDCP_2_2_HDMI_REG_WR_MSG_OFFSET		0x60
 #define HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET	0x70
 #define HDCP_2_2_HDMI_REG_RD_MSG_OFFSET		0x80
 #define HDCP_2_2_HDMI_REG_DBG_OFFSET		0xC0

 #define HDCP_2_2_HDMI_SUPPORT_MASK		BIT(2)
 #define HDCP_2_2_RX_CAPS_VERSION_VAL		0x02
 #define HDCP_2_2_SEQ_NUM_MAX			0xFFFFFF
 #define	HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN	200

 /* Below macros take a byte at a time and mask the bit(s) */
 #define HDCP_2_2_HDMI_RXSTATUS_LEN		2
 #define HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(x)	((x) & 0x3)
 #define HDCP_2_2_HDMI_RXSTATUS_READY(x)		((x) & BIT(2))
 #define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x)	((x) & BIT(3))

 /*
  * Helper functions to convert 24bit big endian hdcp sequence number to
  * host format and back
  */
 static inline
 u32 drm_hdcp_be24_to_cpu(const u8 seq_num[HDCP_2_2_SEQ_NUM_LEN])
 {
 	return (u32)(seq_num[2] | seq_num[1] << 8 | seq_num[0] << 16);
 }

 static inline
 void drm_hdcp_cpu_to_be24(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
 {
 	seq_num[0] = val >> 16;
 	seq_num[1] = val >> 8;
 	seq_num[2] = val;
 }

 #define DRM_HDCP_SRM_GEN1_MAX_BYTES		(5 * 1024)
 #define DRM_HDCP_1_4_SRM_ID			0x8
 #define DRM_HDCP_SRM_ID_MASK			(0xF << 4)
 #define DRM_HDCP_1_4_VRL_LENGTH_SIZE		3
 #define DRM_HDCP_1_4_DCP_SIG_SIZE		40
 #define DRM_HDCP_2_SRM_ID			0x9
 #define DRM_HDCP_2_INDICATOR			0x1
 #define DRM_HDCP_2_INDICATOR_MASK		0xF
 #define DRM_HDCP_2_VRL_LENGTH_SIZE		3
 #define DRM_HDCP_2_DCP_SIG_SIZE			384
 #define DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ	4
 #define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte)	(((byte) & 0xC0) >> 6)

 struct hdcp_srm_header {
 	u8 srm_id;
 	u8 reserved;
 	__be16 srm_version;
 	u8 srm_gen_no;
 } __packed;

 struct drm_device;
 struct drm_connector;

 int drm_hdcp_check_ksvs_revoked(struct drm_device *dev,
 				u8 *ksvs, u32 ksv_count);
 int drm_connector_attach_content_protection_property(
 		struct drm_connector *connector, bool hdcp_content_type);
 void drm_hdcp_update_content_protection(struct drm_connector *connector,
 					u64 val);

 /* Content Type classification for HDCP2.2 vs others */
 #define DRM_MODE_HDCP_CONTENT_TYPE0		0
 #define DRM_MODE_HDCP_CONTENT_TYPE1		1

 #endif
	/* SPDX-License-Identifier: MIT */
	/*
	* Copyright (C) 2017 Google, Inc.
	*
	* Authors:
	* Sean Paul <seanpaul@chromium.org>
	*/

	#ifndef _DRM_HDCP_H_INCLUDED_
	#define _DRM_HDCP_H_INCLUDED_

	#include <linux/types.h>

	/* Period of hdcp checks (to ensure we're still authenticated) */
	#define DRM_HDCP_CHECK_PERIOD_MS (128 * 16)
	#define DRM_HDCP2_CHECK_PERIOD_MS 500

	/* Shared lengths/masks between HDMI/DVI/DisplayPort */
	#define DRM_HDCP_AN_LEN 8
	#define DRM_HDCP_BSTATUS_LEN 2
	#define DRM_HDCP_KSV_LEN 5
	#define DRM_HDCP_RI_LEN 2
	#define DRM_HDCP_V_PRIME_PART_LEN 4
	#define DRM_HDCP_V_PRIME_NUM_PARTS 5
	#define DRM_HDCP_NUM_DOWNSTREAM(x) (x & 0x7f)
	#define DRM_HDCP_MAX_CASCADE_EXCEEDED(x) (x & BIT(3))
	#define DRM_HDCP_MAX_DEVICE_EXCEEDED(x) (x & BIT(7))

	/* Slave address for the HDCP registers in the receiver */
	#define DRM_HDCP_DDC_ADDR 0x3A

	/* HDCP register offsets for HDMI/DVI devices */
	#define DRM_HDCP_DDC_BKSV 0x00
	#define DRM_HDCP_DDC_RI_PRIME 0x08
	#define DRM_HDCP_DDC_AKSV 0x10
	#define DRM_HDCP_DDC_AN 0x18
	#define DRM_HDCP_DDC_V_PRIME(h) (0x20 + h * 4)
	#define DRM_HDCP_DDC_BCAPS 0x40
	#define DRM_HDCP_DDC_BCAPS_REPEATER_PRESENT BIT(6)
	#define DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY BIT(5)
	#define DRM_HDCP_DDC_BSTATUS 0x41
	#define DRM_HDCP_DDC_KSV_FIFO 0x43

	#define DRM_HDCP_1_4_SRM_ID 0x8
	#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
	#define DRM_HDCP_1_4_DCP_SIG_SIZE 40

	/* Protocol message definition for HDCP2.2 specification */
	/*
	* Protected content streams are classified into 2 types:
	* - Type0: Can be transmitted with HDCP 1.4+
	* - Type1: Can be transmitted with HDCP 2.2+
	*/
	#define HDCP_STREAM_TYPE0 0x00
	#define HDCP_STREAM_TYPE1 0x01

	/* HDCP2.2 Msg IDs */
	#define HDCP_2_2_NULL_MSG 1
	#define HDCP_2_2_AKE_INIT 2
	#define HDCP_2_2_AKE_SEND_CERT 3
	#define HDCP_2_2_AKE_NO_STORED_KM 4
	#define HDCP_2_2_AKE_STORED_KM 5
	#define HDCP_2_2_AKE_SEND_HPRIME 7
	#define HDCP_2_2_AKE_SEND_PAIRING_INFO 8
	#define HDCP_2_2_LC_INIT 9
	#define HDCP_2_2_LC_SEND_LPRIME 10
	#define HDCP_2_2_SKE_SEND_EKS 11
	#define HDCP_2_2_REP_SEND_RECVID_LIST 12
	#define HDCP_2_2_REP_SEND_ACK 15
	#define HDCP_2_2_REP_STREAM_MANAGE 16
	#define HDCP_2_2_REP_STREAM_READY 17

	#define HDCP_2_2_RTX_LEN 8
	#define HDCP_2_2_RRX_LEN 8

	#define HDCP_2_2_K_PUB_RX_MOD_N_LEN 128
	#define HDCP_2_2_K_PUB_RX_EXP_E_LEN 3
	#define HDCP_2_2_K_PUB_RX_LEN (HDCP_2_2_K_PUB_RX_MOD_N_LEN + \
	HDCP_2_2_K_PUB_RX_EXP_E_LEN)

	#define HDCP_2_2_DCP_LLC_SIG_LEN 384

	#define HDCP_2_2_E_KPUB_KM_LEN 128
	#define HDCP_2_2_E_KH_KM_M_LEN (16 + 16)
	#define HDCP_2_2_H_PRIME_LEN 32
	#define HDCP_2_2_E_KH_KM_LEN 16
	#define HDCP_2_2_RN_LEN 8
	#define HDCP_2_2_L_PRIME_LEN 32
	#define HDCP_2_2_E_DKEY_KS_LEN 16
	#define HDCP_2_2_RIV_LEN 8
	#define HDCP_2_2_SEQ_NUM_LEN 3
	#define HDCP_2_2_V_PRIME_HALF_LEN (HDCP_2_2_L_PRIME_LEN / 2)
	#define HDCP_2_2_RECEIVER_ID_LEN DRM_HDCP_KSV_LEN
	#define HDCP_2_2_MAX_DEVICE_COUNT 31
	#define HDCP_2_2_RECEIVER_IDS_MAX_LEN (HDCP_2_2_RECEIVER_ID_LEN * \
	HDCP_2_2_MAX_DEVICE_COUNT)
	#define HDCP_2_2_MPRIME_LEN 32

	/* Following Macros take a byte at a time for bit(s) masking */
	/*
	* TODO: This has to be changed for DP MST, as multiple stream on
	* same port is possible.
	* For HDCP2.2 on HDMI and DP SST this value is always 1.
	*/
	#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT 1
	#define HDCP_2_2_TXCAP_MASK_LEN 2
	#define HDCP_2_2_RXCAPS_LEN 3
	#define HDCP_2_2_RX_REPEATER(x) ((x) & BIT(0))
	#define HDCP_2_2_DP_HDCP_CAPABLE(x) ((x) & BIT(1))
	#define HDCP_2_2_RXINFO_LEN 2

	/* HDCP1.x compliant device in downstream */
	#define HDCP_2_2_HDCP1_DEVICE_CONNECTED(x) ((x) & BIT(0))

	/* HDCP2.0 Compliant repeater in downstream */
	#define HDCP_2_2_HDCP_2_0_REP_CONNECTED(x) ((x) & BIT(1))
	#define HDCP_2_2_MAX_CASCADE_EXCEEDED(x) ((x) & BIT(2))
	#define HDCP_2_2_MAX_DEVS_EXCEEDED(x) ((x) & BIT(3))
	#define HDCP_2_2_DEV_COUNT_LO(x) (((x) & (0xF << 4)) >> 4)
	#define HDCP_2_2_DEV_COUNT_HI(x) ((x) & BIT(0))
	#define HDCP_2_2_DEPTH(x) (((x) & (0x7 << 1)) >> 1)

	struct hdcp2_cert_rx {
	u8 receiver_id[HDCP_2_2_RECEIVER_ID_LEN];
	u8 kpub_rx[HDCP_2_2_K_PUB_RX_LEN];
	u8 reserved[2];
	u8 dcp_signature[HDCP_2_2_DCP_LLC_SIG_LEN];
	} __packed;

	struct hdcp2_streamid_type {
	u8 stream_id;
	u8 stream_type;
	} __packed;

	/*
	* The TxCaps field specified in the HDCP HDMI, DP specs
	* This field is big endian as specified in the errata.
	*/
	struct hdcp2_tx_caps {
	/* Transmitter must set this to 0x2 */
	u8 version;

	/* Reserved for HDCP and DP Spec. Read as Zero */
	u8 tx_cap_mask[HDCP_2_2_TXCAP_MASK_LEN];
	} __packed;

	/* Main structures for HDCP2.2 protocol communication */
	struct hdcp2_ake_init {
	u8 msg_id;
	u8 r_tx[HDCP_2_2_RTX_LEN];
	struct hdcp2_tx_caps tx_caps;
	} __packed;

	struct hdcp2_ake_send_cert {
	u8 msg_id;
	struct hdcp2_cert_rx cert_rx;
	u8 r_rx[HDCP_2_2_RRX_LEN];
	u8 rx_caps[HDCP_2_2_RXCAPS_LEN];
	} __packed;

	struct hdcp2_ake_no_stored_km {
	u8 msg_id;
	u8 e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
	} __packed;

	struct hdcp2_ake_stored_km {
	u8 msg_id;
	u8 e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
	} __packed;

	struct hdcp2_ake_send_hprime {
	u8 msg_id;
	u8 h_prime[HDCP_2_2_H_PRIME_LEN];
	} __packed;

	struct hdcp2_ake_send_pairing_info {
	u8 msg_id;
	u8 e_kh_km[HDCP_2_2_E_KH_KM_LEN];
	} __packed;

	struct hdcp2_lc_init {
	u8 msg_id;
	u8 r_n[HDCP_2_2_RN_LEN];
	} __packed;

	struct hdcp2_lc_send_lprime {
	u8 msg_id;
	u8 l_prime[HDCP_2_2_L_PRIME_LEN];
	} __packed;

	struct hdcp2_ske_send_eks {
	u8 msg_id;
	u8 e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
	u8 riv[HDCP_2_2_RIV_LEN];
	} __packed;

	struct hdcp2_rep_send_receiverid_list {
	u8 msg_id;
	u8 rx_info[HDCP_2_2_RXINFO_LEN];
	u8 seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
	u8 v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
	u8 receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
	} __packed;

	struct hdcp2_rep_send_ack {
	u8 msg_id;
	u8 v[HDCP_2_2_V_PRIME_HALF_LEN];
	} __packed;

	struct hdcp2_rep_stream_manage {
	u8 msg_id;
	u8 seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
	__be16 k;
	struct hdcp2_streamid_type streams[HDCP_2_2_MAX_CONTENT_STREAMS_CNT];
	} __packed;

	struct hdcp2_rep_stream_ready {
	u8 msg_id;
	u8 m_prime[HDCP_2_2_MPRIME_LEN];
	} __packed;

	/* HDCP2.2 TIMEOUTs in mSec */
	#define HDCP_2_2_CERT_TIMEOUT_MS 100
	#define HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS 1000
	#define HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS 200
	#define HDCP_2_2_PAIRING_TIMEOUT_MS 200
	#define HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS 20
	#define HDCP_2_2_DP_LPRIME_TIMEOUT_MS 7
	#define HDCP_2_2_RECVID_LIST_TIMEOUT_MS 3000
	#define HDCP_2_2_STREAM_READY_TIMEOUT_MS 100

	/* HDMI HDCP2.2 Register Offsets */
	#define HDCP_2_2_HDMI_REG_VER_OFFSET 0x50
	#define HDCP_2_2_HDMI_REG_WR_MSG_OFFSET 0x60
	#define HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET 0x70
	#define HDCP_2_2_HDMI_REG_RD_MSG_OFFSET 0x80
	#define HDCP_2_2_HDMI_REG_DBG_OFFSET 0xC0

	#define HDCP_2_2_HDMI_SUPPORT_MASK BIT(2)
	#define HDCP_2_2_RX_CAPS_VERSION_VAL 0x02
	#define HDCP_2_2_SEQ_NUM_MAX 0xFFFFFF
	#define HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN 200

	/* Below macros take a byte at a time and mask the bit(s) */
	#define HDCP_2_2_HDMI_RXSTATUS_LEN 2
	#define HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(x) ((x) & 0x3)
	#define HDCP_2_2_HDMI_RXSTATUS_READY(x) ((x) & BIT(2))
	#define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x) ((x) & BIT(3))

	/*
	* Helper functions to convert 24bit big endian hdcp sequence number to
	* host format and back
	*/
	static inline
	u32 drm_hdcp_be24_to_cpu(const u8 seq_num[HDCP_2_2_SEQ_NUM_LEN])
	{
	return (u32)(seq_num[2] \| seq_num[1] << 8 \| seq_num[0] << 16);
	}

	static inline
	void drm_hdcp_cpu_to_be24(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
	{
	seq_num[0] = val >> 16;
	seq_num[1] = val >> 8;
	seq_num[2] = val;
	}

	#define DRM_HDCP_SRM_GEN1_MAX_BYTES (5 * 1024)
	#define DRM_HDCP_1_4_SRM_ID 0x8
	#define DRM_HDCP_SRM_ID_MASK (0xF << 4)
	#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
	#define DRM_HDCP_1_4_DCP_SIG_SIZE 40
	#define DRM_HDCP_2_SRM_ID 0x9
	#define DRM_HDCP_2_INDICATOR 0x1
	#define DRM_HDCP_2_INDICATOR_MASK 0xF
	#define DRM_HDCP_2_VRL_LENGTH_SIZE 3
	#define DRM_HDCP_2_DCP_SIG_SIZE 384
	#define DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ 4
	#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte) (((byte) & 0xC0) >> 6)

	struct hdcp_srm_header {
	u8 srm_id;
	u8 reserved;
	__be16 srm_version;
	u8 srm_gen_no;
	} __packed;

	struct drm_device;
	struct drm_connector;

	int drm_hdcp_check_ksvs_revoked(struct drm_device *dev,
	u8 *ksvs, u32 ksv_count);
	int drm_connector_attach_content_protection_property(
	struct drm_connector *connector, bool hdcp_content_type);
	void drm_hdcp_update_content_protection(struct drm_connector *connector,
	u64 val);

	/* Content Type classification for HDCP2.2 vs others */
	#define DRM_MODE_HDCP_CONTENT_TYPE0 0
	#define DRM_MODE_HDCP_CONTENT_TYPE1 1

	#endif