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drm: Add some HDCP related #defines 

In preparation for implementing HDCP in i915, add some HDCP related
register offsets and defines. The dpcd register offsets will go in
drm_dp_helper.h whereas the ddc offsets along with generic HDCP stuff
will get stuffed in drm_hdcp.h, which is new.

Changes in v2:
- drm_hdcp.h gets MIT license (Daniel)
Changes in v3:
- None
Changes in v4:
- None
Changes in v5:
- None
Changes in v6:
- SPDX license

Cc: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Ramalingam C <ramalingm.c@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180108195545.218615-5-seanpaul@chromium.org
This commit is contained in:
Sean Paul 2018-01-08 14:55:38 -05:00
parent 24557865c8
commit 495eb7f877
2 changed files with 56 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
include/drm/drm_dp_helper.h
View File

@ -836,6 +836,23 @@
#define DP_CEC_TX_MESSAGE_BUFFER 0x3020
#define DP_CEC_MESSAGE_BUFFER_LENGTH 0x10
#define DP_AUX_HDCP_BKSV 0x68000
#define DP_AUX_HDCP_RI_PRIME 0x68005
#define DP_AUX_HDCP_AKSV 0x68007
#define DP_AUX_HDCP_AN 0x6800C
#define DP_AUX_HDCP_V_PRIME(h) (0x68014 + h * 4)
#define DP_AUX_HDCP_BCAPS 0x68028
# define DP_BCAPS_REPEATER_PRESENT BIT(1)
# define DP_BCAPS_HDCP_CAPABLE BIT(0)
#define DP_AUX_HDCP_BSTATUS 0x68029
# define DP_BSTATUS_REAUTH_REQ BIT(3)
# define DP_BSTATUS_LINK_FAILURE BIT(2)
# define DP_BSTATUS_R0_PRIME_READY BIT(1)
# define DP_BSTATUS_READY BIT(0)
#define DP_AUX_HDCP_BINFO 0x6802A
#define DP_AUX_HDCP_KSV_FIFO 0x6802C
#define DP_AUX_HDCP_AINFO 0x6803B
/* DP 1.2 Sideband message defines */
/* peer device type - DP 1.2a Table 2-92 */
#define DP_PEER_DEVICE_NONE 0x0

39
include/drm/drm_hdcp.h Normal file
View File

@ -0,0 +1,39 @@
/* 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 & 0x3f)
/* 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