1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/* Copyright 2020 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* DisplayPort alternate mode support
* Refer to VESA DisplayPort Alt Mode on USB Type-C Standard, version 2.0,
* section 5.2
*/
#ifndef __CROS_EC_USB_DP_ALT_MODE_H
#define __CROS_EC_USB_DP_ALT_MODE_H
#include <stdint.h>
#include "tcpm/tcpm.h"
#include "usb_pd_dpm.h"
/*
* Initialize DP state for the specified port.
*
* @param port USB-C port number
*/
void dp_init(int port);
/*
* Returns True if DisplayPort mode is in active state
*
* @param port USB-C port number
* @return True if DisplayPort mode is in active state
* False otherwise
*/
bool dp_is_active(int port);
/*
* Returns True if DisplayPort mode entry has not started, or mode exit has
* already finished.
* TODO(b/235984702): Consolidate the DP state API
*
* @param port USB-C port number
* @return True if DisplayPort mode is in inactive state
* False otherwise.
*/
bool dp_is_idle(int port);
/*
* Checks whether the mode entry sequence for DisplayPort alternate mode is done
* for a port.
*
* @param port USB-C port number
* @return True if entry sequence for DisplayPort mode is completed
* False otherwise
*/
bool dp_entry_is_done(int port);
/*
* Handles received DisplayPort VDM ACKs.
*
* @param port USB-C port number
* @param type Transmit type (SOP, SOP') for received ACK
* @param vdo_count The number of VDOs in the ACK VDM
* @param vdm VDM from ACK
*/
void dp_vdm_acked(int port, enum tcpci_msg_type type, int vdo_count,
uint32_t *vdm);
/*
* Handles NAKed (or Not Supported or timed out) DisplayPort VDM requests.
*
* @param port USB-C port number
* @param type Transmit type (SOP, SOP') for request
* @param svid The SVID of the request
* @param vdm_cmd The VDM command of the request
*/
void dp_vdm_naked(int port, enum tcpci_msg_type type, uint8_t vdm_cmd);
/*
* Construct the next DisplayPort VDM that should be sent.
*
* @param[in] port USB-C port number
* @param[in,out] vdo_count The number of VDOs in vdm; must be at least
* VDO_MAX_SIZE. On success, number of populated VDOs
* @param[out] vdm The VDM payload to be sent; output; must point to at
* least VDO_MAX_SIZE elements
* @return enum dpm_msg_setup_status
*/
enum dpm_msg_setup_status dp_setup_next_vdm(int port, int *vdo_count,
uint32_t *vdm);
#endif /* __CROS_EC_USB_DP_ALT_MODE_H */
|
