1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __USB_TYPEC_DP_H 3 #define __USB_TYPEC_DP_H 4 5 #include <linux/usb/typec_altmode.h> 6 7 #define USB_TYPEC_DP_SID 0xff01 8 /* USB IF has not assigned a Standard ID (SID) for VirtualLink, 9 * so the manufacturers of VirtualLink adapters use their Vendor 10 * IDs as the SVID. 11 */ 12 #define USB_TYPEC_NVIDIA_VLINK_SID 0x955 /* NVIDIA VirtualLink */ 13 #define USB_TYPEC_DP_MODE 1 14 15 /* 16 * Connector states matching the pin assignments in DisplayPort Alt Mode 17 * Specification. 18 * 19 * These values are meant primarily to be used by the mux drivers, but they are 20 * also used as the "value" part in the alternate mode notification chain, so 21 * receivers of those notifications will always see them. 22 * 23 * Note. DisplayPort USB Type-C Alt Mode Specification version 1.0b deprecated 24 * pin assignments A, B and F, but they are still defined here for legacy 25 * purposes. 26 */ 27 enum { 28 TYPEC_DP_STATE_A = TYPEC_STATE_MODAL, /* Not supported after v1.0b */ 29 TYPEC_DP_STATE_B, /* Not supported after v1.0b */ 30 TYPEC_DP_STATE_C, 31 TYPEC_DP_STATE_D, 32 TYPEC_DP_STATE_E, 33 TYPEC_DP_STATE_F, /* Not supported after v1.0b */ 34 }; 35 36 /* 37 * struct typec_displayport_data - DisplayPort Alt Mode specific data 38 * @status: Status Update command VDO content 39 * @conf: Configure command VDO content 40 * 41 * This structure is delivered as the data part with the notifications. It 42 * contains the VDOs from the two DisplayPort Type-C alternate mode specific 43 * commands: Status Update and Configure. 44 * 45 * @status will show for example the status of the HPD signal. 46 */ 47 struct typec_displayport_data { 48 u32 status; 49 u32 conf; 50 }; 51 52 enum { 53 DP_PIN_ASSIGN_A, /* Not supported after v1.0b */ 54 DP_PIN_ASSIGN_B, /* Not supported after v1.0b */ 55 DP_PIN_ASSIGN_C, 56 DP_PIN_ASSIGN_D, 57 DP_PIN_ASSIGN_E, 58 DP_PIN_ASSIGN_F, /* Not supported after v1.0b */ 59 }; 60 61 /* DisplayPort alt mode specific commands */ 62 #define DP_CMD_STATUS_UPDATE VDO_CMD_VENDOR(0) 63 #define DP_CMD_CONFIGURE VDO_CMD_VENDOR(1) 64 65 /* DisplayPort Capabilities VDO bits (returned with Discover Modes) */ 66 #define DP_CAP_CAPABILITY(_cap_) ((_cap_) & 3) 67 #define DP_CAP_UFP_D 1 68 #define DP_CAP_DFP_D 2 69 #define DP_CAP_DFP_D_AND_UFP_D 3 70 #define DP_CAP_DP_SIGNALING BIT(2) /* Always set */ 71 #define DP_CAP_GEN2 BIT(3) /* Reserved after v1.0b */ 72 #define DP_CAP_RECEPTACLE BIT(6) 73 #define DP_CAP_USB BIT(7) 74 #define DP_CAP_DFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(15, 8)) >> 8) 75 #define DP_CAP_UFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(23, 16)) >> 16) 76 77 /* DisplayPort Status Update VDO bits */ 78 #define DP_STATUS_CONNECTION(_status_) ((_status_) & 3) 79 #define DP_STATUS_CON_DISABLED 0 80 #define DP_STATUS_CON_DFP_D 1 81 #define DP_STATUS_CON_UFP_D 2 82 #define DP_STATUS_CON_BOTH 3 83 #define DP_STATUS_POWER_LOW BIT(2) 84 #define DP_STATUS_ENABLED BIT(3) 85 #define DP_STATUS_PREFER_MULTI_FUNC BIT(4) 86 #define DP_STATUS_SWITCH_TO_USB BIT(5) 87 #define DP_STATUS_EXIT_DP_MODE BIT(6) 88 #define DP_STATUS_HPD_STATE BIT(7) /* 0 = HPD_Low, 1 = HPD_High */ 89 #define DP_STATUS_IRQ_HPD BIT(8) 90 91 /* DisplayPort Configurations VDO bits */ 92 #define DP_CONF_CURRENTLY(_conf_) ((_conf_) & 3) 93 #define DP_CONF_UFP_U_AS_DFP_D BIT(0) 94 #define DP_CONF_UFP_U_AS_UFP_D BIT(1) 95 #define DP_CONF_SIGNALING_DP BIT(2) 96 #define DP_CONF_SIGNALING_GEN_2 BIT(3) /* Reserved after v1.0b */ 97 #define DP_CONF_PIN_ASSIGNEMENT_SHIFT 8 98 #define DP_CONF_PIN_ASSIGNEMENT_MASK GENMASK(15, 8) 99 100 /* Helper for setting/getting the pin assignement value to the configuration */ 101 #define DP_CONF_SET_PIN_ASSIGN(_a_) ((_a_) << 8) 102 #define DP_CONF_GET_PIN_ASSIGN(_conf_) (((_conf_) & GENMASK(15, 8)) >> 8) 103 104 #endif /* __USB_TYPEC_DP_H */ 105