1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __USB_TYPEC_DP_H
3 #define __USB_TYPEC_DP_H
5 #include <linux/usb/typec_altmode.h>
6 #include <linux/bitfield.h>
8 #define USB_TYPEC_DP_SID 0xff01
9 /* USB IF has not assigned a Standard ID (SID) for VirtualLink,
10 * so the manufacturers of VirtualLink adapters use their Vendor
13 #define USB_TYPEC_NVIDIA_VLINK_SID 0x955 /* NVIDIA VirtualLink */
14 #define USB_TYPEC_DP_MODE 1
17 * Connector states matching the pin assignments in DisplayPort Alt Mode
20 * These values are meant primarily to be used by the mux drivers, but they are
21 * also used as the "value" part in the alternate mode notification chain, so
22 * receivers of those notifications will always see them.
24 * Note. DisplayPort USB Type-C Alt Mode Specification version 1.0b deprecated
25 * pin assignments A, B and F, but they are still defined here for legacy
29 TYPEC_DP_STATE_A = TYPEC_STATE_MODAL, /* Not supported after v1.0b */
30 TYPEC_DP_STATE_B, /* Not supported after v1.0b */
34 TYPEC_DP_STATE_F, /* Not supported after v1.0b */
38 * struct typec_displayport_data - DisplayPort Alt Mode specific data
39 * @status: Status Update command VDO content
40 * @conf: Configure command VDO content
42 * This structure is delivered as the data part with the notifications. It
43 * contains the VDOs from the two DisplayPort Type-C alternate mode specific
44 * commands: Status Update and Configure.
46 * @status will show for example the status of the HPD signal.
48 struct typec_displayport_data {
54 DP_PIN_ASSIGN_A, /* Not supported after v1.0b */
55 DP_PIN_ASSIGN_B, /* Not supported after v1.0b */
59 DP_PIN_ASSIGN_F, /* Not supported after v1.0b */
62 /* DisplayPort alt mode specific commands */
63 #define DP_CMD_STATUS_UPDATE VDO_CMD_VENDOR(0)
64 #define DP_CMD_CONFIGURE VDO_CMD_VENDOR(1)
66 /* DisplayPort Capabilities VDO bits (returned with Discover Modes) */
67 #define DP_CAP_CAPABILITY(_cap_) ((_cap_) & 3)
68 #define DP_CAP_UFP_D 1
69 #define DP_CAP_DFP_D 2
70 #define DP_CAP_DFP_D_AND_UFP_D 3
71 #define DP_CAP_DP_SIGNALLING(_cap_) FIELD_GET(GENMASK(5, 2), _cap_)
72 #define DP_CAP_SIGNALLING_HBR3 1
73 #define DP_CAP_SIGNALLING_UHBR10 2
74 #define DP_CAP_SIGNALLING_UHBR20 3
75 #define DP_CAP_RECEPTACLE BIT(6)
76 #define DP_CAP_USB BIT(7)
77 #define DP_CAP_DFP_D_PIN_ASSIGN(_cap_) FIELD_GET(GENMASK(15, 8), _cap_)
78 #define DP_CAP_UFP_D_PIN_ASSIGN(_cap_) FIELD_GET(GENMASK(23, 16), _cap_)
79 /* Get pin assignment taking plug & receptacle into consideration */
80 #define DP_CAP_PIN_ASSIGN_UFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
81 DP_CAP_UFP_D_PIN_ASSIGN(_cap_) : DP_CAP_DFP_D_PIN_ASSIGN(_cap_))
82 #define DP_CAP_PIN_ASSIGN_DFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
83 DP_CAP_DFP_D_PIN_ASSIGN(_cap_) : DP_CAP_UFP_D_PIN_ASSIGN(_cap_))
84 #define DP_CAP_UHBR_13_5_SUPPORT BIT(26)
85 #define DP_CAP_CABLE_TYPE(_cap_) FIELD_GET(GENMASK(29, 28), _cap_)
86 #define DP_CAP_CABLE_TYPE_PASSIVE 0
87 #define DP_CAP_CABLE_TYPE_RE_TIMER 1
88 #define DP_CAP_CABLE_TYPE_RE_DRIVER 2
89 #define DP_CAP_CABLE_TYPE_OPTICAL 3
90 #define DP_CAP_DPAM_VERSION BIT(30)
92 /* DisplayPort Status Update VDO bits */
93 #define DP_STATUS_CONNECTION(_status_) ((_status_) & 3)
94 #define DP_STATUS_CON_DISABLED 0
95 #define DP_STATUS_CON_DFP_D 1
96 #define DP_STATUS_CON_UFP_D 2
97 #define DP_STATUS_CON_BOTH 3
98 #define DP_STATUS_POWER_LOW BIT(2)
99 #define DP_STATUS_ENABLED BIT(3)
100 #define DP_STATUS_PREFER_MULTI_FUNC BIT(4)
101 #define DP_STATUS_SWITCH_TO_USB BIT(5)
102 #define DP_STATUS_EXIT_DP_MODE BIT(6)
103 #define DP_STATUS_HPD_STATE BIT(7) /* 0 = HPD_Low, 1 = HPD_High */
104 #define DP_STATUS_IRQ_HPD BIT(8)
106 /* DisplayPort Configurations VDO bits */
107 #define DP_CONF_CURRENTLY(_conf_) ((_conf_) & 3)
108 #define DP_CONF_UFP_U_AS_DFP_D BIT(0)
109 #define DP_CONF_UFP_U_AS_UFP_D BIT(1)
110 #define DP_CONF_SIGNALLING_MASK GENMASK(5, 2)
111 #define DP_CONF_SIGNALLING_SHIFT 2
112 #define DP_CONF_SIGNALLING_HBR3 1
113 #define DP_CONF_SIGNALLING_UHBR10 2
114 #define DP_CONF_SIGNALLING_UHBR20 3
115 #define DP_CONF_PIN_ASSIGNEMENT_SHIFT 8
116 #define DP_CONF_PIN_ASSIGNEMENT_MASK GENMASK(15, 8)
118 /* Helper for setting/getting the pin assignment value to the configuration */
119 #define DP_CONF_SET_PIN_ASSIGN(_a_) ((_a_) << 8)
120 #define DP_CONF_GET_PIN_ASSIGN(_conf_) FIELD_GET(GENMASK(15, 8), _conf_)
121 #define DP_CONF_UHBR13_5_SUPPORT BIT(26)
122 #define DP_CONF_CABLE_TYPE_MASK GENMASK(29, 28)
123 #define DP_CONF_CABLE_TYPE_SHIFT 28
124 #define DP_CONF_CABLE_TYPE_PASSIVE 0
125 #define DP_CONF_CABLE_TYPE_RE_TIMER 1
126 #define DP_CONF_CABLE_TYPE_RE_DRIVER 2
127 #define DP_CONF_CABLE_TYPE_OPTICAL 3
128 #define DP_CONF_DPAM_VERSION BIT(30)
130 #endif /* __USB_TYPEC_DP_H */