drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Cadence MHDP8546 DP bridge driver.
   4  *
   5  * Copyright (C) 2020 Cadence Design Systems, Inc.
   6  *
   7  */
   8
   9 #ifndef CDNS_MHDP8546_HDCP_H
  10 #define CDNS_MHDP8546_HDCP_H
  11
  12 #include "cdns-mhdp8546-core.h"
  13
  14 #define HDCP_MAX_RECEIVERS 32
  15 #define HDCP_RECEIVER_ID_SIZE_BYTES 5
  16 #define HDCP_STATUS_SIZE         0x5
  17 #define HDCP_PORT_STS_AUTH       0x1
  18 #define HDCP_PORT_STS_LAST_ERR_SHIFT 0x5
  19 #define HDCP_PORT_STS_LAST_ERR_MASK  (0x0F << 5)
  20 #define GET_HDCP_PORT_STS_LAST_ERR(__sts__) \
  21         (((__sts__) & HDCP_PORT_STS_LAST_ERR_MASK) >> \
  22         HDCP_PORT_STS_LAST_ERR_SHIFT)
  23
  24 #define HDCP_CONFIG_1_4     BIT(0) /* use HDCP 1.4 only */
  25 #define HDCP_CONFIG_2_2     BIT(1) /* use HDCP 2.2 only */
  26 /* use All HDCP versions */
  27 #define HDCP_CONFIG_ALL     (BIT(0) | BIT(1))
  28 #define HDCP_CONFIG_NONE    0
  29
  30 enum {
  31         HDCP_GENERAL_SET_LC_128,
  32         HDCP_SET_SEED,
  33 };
  34
  35 enum {
  36         HDCP_TRAN_CONFIGURATION,
  37         HDCP2X_TX_SET_PUBLIC_KEY_PARAMS,
  38         HDCP2X_TX_SET_DEBUG_RANDOM_NUMBERS,
  39         HDCP2X_TX_RESPOND_KM,
  40         HDCP1_TX_SEND_KEYS,
  41         HDCP1_TX_SEND_RANDOM_AN,
  42         HDCP_TRAN_STATUS_CHANGE,
  43         HDCP2X_TX_IS_KM_STORED,
  44         HDCP2X_TX_STORE_KM,
  45         HDCP_TRAN_IS_REC_ID_VALID,
  46         HDCP_TRAN_RESPOND_RECEIVER_ID_VALID,
  47         HDCP_TRAN_TEST_KEYS,
  48         HDCP2X_TX_SET_KM_KEY_PARAMS,
  49         HDCP_NUM_OF_SUPPORTED_MESSAGES
  50 };
  51
  52 enum {
  53         HDCP_CONTENT_TYPE_0,
  54         HDCP_CONTENT_TYPE_1,
  55 };
  56
  57 #define DRM_HDCP_CHECK_PERIOD_MS (128 * 16)
  58
  59 #define HDCP_PAIRING_R_ID 5
  60 #define HDCP_PAIRING_M_LEN 16
  61 #define HDCP_KM_LEN 16
  62 #define HDCP_PAIRING_M_EKH 16
  63
  64 struct cdns_hdcp_pairing_data {
  65         u8 receiver_id[HDCP_PAIRING_R_ID];
  66         u8 m[HDCP_PAIRING_M_LEN];
  67         u8 km[HDCP_KM_LEN];
  68         u8 ekh[HDCP_PAIRING_M_EKH];
  69 };
  70
  71 enum {
  72         HDCP_TX_2,
  73         HDCP_TX_1,
  74         HDCP_TX_BOTH,
  75 };
  76
  77 #define DLP_MODULUS_N 384
  78 #define DLP_E 3
  79
  80 struct cdns_hdcp_tx_public_key_param {
  81         u8 N[DLP_MODULUS_N];
  82         u8 E[DLP_E];
  83 };
  84
  85 int cdns_mhdp_hdcp_set_public_key_param(struct cdns_mhdp_device *mhdp,
  86                                         struct cdns_hdcp_tx_public_key_param *val);
  87 int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val);
  88 int cdns_mhdp_hdcp_enable(struct cdns_mhdp_device *mhdp, u8 content_type);
  89 int cdns_mhdp_hdcp_disable(struct cdns_mhdp_device *mhdp);
  90 void cdns_mhdp_hdcp_init(struct cdns_mhdp_device *mhdp);
  91
  92 #endif