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