107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
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/*
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* dphdcp.h: dp hdcp driver.
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*
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* Copyright (c) 2015-2019, NVIDIA CORPORATION, All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <uapi/video/nvhdcp.h>
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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#include <linux/miscdevice.h>
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#endif
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#define HDCP_HDCP2_VERSION 0x50
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#define HDCP_HDCP2_VERSION_HDCP22_YES 0x04 /* DP 2.2 */
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#define HDCP_HDCP2_VERSION_HDCP22_NO 0x00 /* DP 1.x */
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#define HDCP_WRITE_MSG 0x60
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#define HDCP_RX_STATUS 0x70
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#define HDCP_RX_STATUS_MSG_SIZE_MASK 0x03ff
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#define HDCP_RX_STATUS_MSG_READY_YES 0x0400
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#define HDCP_RX_STATUS_MSG_READY_NO 0x0000
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#define HDCP_RX_STATUS_MSG_REAUTH_REQ 0x0800
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#define HDCP_READ_MSG 0x80
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#define HDCP_MIN_RETRIES 0
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#define HDCP_MAX_RETRIES 5
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#define TEGRA_DPHDCP_MAX_DEVS 127
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/* for dphdcp state */
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enum tegra_dphdcp_state {
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STATE_OFF,
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STATE_UNAUTHENTICATED,
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STATE_LINK_VERIFY,
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STATE_RENEGOTIATE,
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};
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struct tegra_dphdcp {
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struct delayed_work work;
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struct tegra_dc_dp_data *dp;
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struct workqueue_struct *downstream_wq;
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struct mutex lock;
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struct miscdevice miscdev;
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char name[12];
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unsigned id;
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bool plugged; /* true if hotplug detected */
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atomic_t policy;
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enum tegra_dphdcp_state state; /* un/authenticated, etc */
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struct i2c_board_info info;
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int bus;
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u32 binfo;
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u64 a_n;
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u64 c_n;
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u64 a_ksv;
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u64 b_ksv;
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u64 c_ksv;
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u64 d_ksv;
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u8 v_prime[20];
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u64 m_prime;
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u32 num_bksv_list;
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u64 bksv_list[TEGRA_DPHDCP_MAX_DEVS];
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int fail_count;
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char hdcp22;
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u8 max_retries;
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u8 hpd;
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u8 repeater;
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void *ta_ctx;
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};
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#ifdef CONFIG_DPHDCP
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void tegra_dphdcp_set_plug(struct tegra_dphdcp *dphdcp, bool hpd);
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int tegra_dphdcp_set_policy(struct tegra_dphdcp *nvhdcp, int pol);
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struct tegra_dphdcp *tegra_dphdcp_create(struct tegra_dc_dp_data *dp,
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int id, int bus);
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void tegra_dphdcp_debugfs_init(struct tegra_dphdcp *dphdcp);
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void tegra_dphdcp_destroy(struct tegra_dphdcp *dphdcp);
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#else
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static inline void tegra_dphdcp_set_plug(struct tegra_dphdcp *dphdcp, bool hpd)
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{
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}
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static inline int tegra_dphdcp_set_policy(struct tegra_dphdcp *dphdcp,
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int pol)
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{
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return 0;
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}
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static inline struct tegra_dphdcp *tegra_dphdcp_create(
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struct tegra_dc_dp_data *dp, int id, int bus)
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{
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return NULL;
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}
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static inline void tegra_dphdcp_destroy(struct tegra_dphdcp *dphdcp)
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{
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}
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#endif
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