/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __USB_TYPEC_DP_H
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#define __USB_TYPEC_DP_H
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#include <linux/usb/typec_altmode.h>
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#define USB_TYPEC_DP_SID 0xff01
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/* USB IF has not assigned a Standard ID (SID) for VirtualLink,
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* so the manufacturers of VirtualLink adapters use their Vendor
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* IDs as the SVID.
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*/
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#define USB_TYPEC_NVIDIA_VLINK_SID 0x955 /* NVIDIA VirtualLink */
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#define USB_TYPEC_DP_MODE 1
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/*
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* Connector states matching the pin assignments in DisplayPort Alt Mode
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* Specification.
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*
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* These values are meant primarily to be used by the mux drivers, but they are
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* also used as the "value" part in the alternate mode notification chain, so
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* receivers of those notifications will always see them.
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*
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* Note. DisplayPort USB Type-C Alt Mode Specification version 1.0b deprecated
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* pin assignments A, B and F, but they are still defined here for legacy
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* purposes.
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*/
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enum {
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TYPEC_DP_STATE_A = TYPEC_STATE_MODAL, /* Not supported after v1.0b */
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TYPEC_DP_STATE_B, /* Not supported after v1.0b */
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TYPEC_DP_STATE_C,
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TYPEC_DP_STATE_D,
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TYPEC_DP_STATE_E,
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TYPEC_DP_STATE_F, /* Not supported after v1.0b */
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};
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/*
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* struct typec_displayport_data - DisplayPort Alt Mode specific data
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* @status: Status Update command VDO content
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* @conf: Configure command VDO content
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*
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* This structure is delivered as the data part with the notifications. It
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* contains the VDOs from the two DisplayPort Type-C alternate mode specific
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* commands: Status Update and Configure.
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*
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* @status will show for example the status of the HPD signal.
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*/
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struct typec_displayport_data {
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u32 status;
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u32 conf;
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};
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enum {
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DP_PIN_ASSIGN_A, /* Not supported after v1.0b */
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DP_PIN_ASSIGN_B, /* Not supported after v1.0b */
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DP_PIN_ASSIGN_C,
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DP_PIN_ASSIGN_D,
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DP_PIN_ASSIGN_E,
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DP_PIN_ASSIGN_F, /* Not supported after v1.0b */
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};
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/* DisplayPort alt mode specific commands */
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#define DP_CMD_STATUS_UPDATE VDO_CMD_VENDOR(0)
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#define DP_CMD_CONFIGURE VDO_CMD_VENDOR(1)
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/* DisplayPort Capabilities VDO bits (returned with Discover Modes) */
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#define DP_CAP_CAPABILITY(_cap_) ((_cap_) & 3)
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#define DP_CAP_UFP_D 1
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#define DP_CAP_DFP_D 2
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#define DP_CAP_DFP_D_AND_UFP_D 3
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#define DP_CAP_DP_SIGNALING BIT(2) /* Always set */
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#define DP_CAP_GEN2 BIT(3) /* Reserved after v1.0b */
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#define DP_CAP_RECEPTACLE BIT(6)
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#define DP_CAP_USB BIT(7)
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#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(15, 8)) >> 8)
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#define DP_CAP_UFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(23, 16)) >> 16)
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/* Get pin assignment taking plug & receptacle into consideration */
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#define DP_CAP_PIN_ASSIGN_UFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
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DP_CAP_UFP_D_PIN_ASSIGN(_cap_) : DP_CAP_DFP_D_PIN_ASSIGN(_cap_))
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#define DP_CAP_PIN_ASSIGN_DFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
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DP_CAP_DFP_D_PIN_ASSIGN(_cap_) : DP_CAP_UFP_D_PIN_ASSIGN(_cap_))
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/* DisplayPort Status Update VDO bits */
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#define DP_STATUS_CONNECTION(_status_) ((_status_) & 3)
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#define DP_STATUS_CON_DISABLED 0
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#define DP_STATUS_CON_DFP_D 1
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#define DP_STATUS_CON_UFP_D 2
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#define DP_STATUS_CON_BOTH 3
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#define DP_STATUS_POWER_LOW BIT(2)
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#define DP_STATUS_ENABLED BIT(3)
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#define DP_STATUS_PREFER_MULTI_FUNC BIT(4)
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#define DP_STATUS_SWITCH_TO_USB BIT(5)
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#define DP_STATUS_EXIT_DP_MODE BIT(6)
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#define DP_STATUS_HPD_STATE BIT(7) /* 0 = HPD_Low, 1 = HPD_High */
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#define DP_STATUS_IRQ_HPD BIT(8)
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/* DisplayPort Configurations VDO bits */
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#define DP_CONF_CURRENTLY(_conf_) ((_conf_) & 3)
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#define DP_CONF_UFP_U_AS_DFP_D BIT(0)
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#define DP_CONF_UFP_U_AS_UFP_D BIT(1)
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#define DP_CONF_SIGNALING_DP BIT(2)
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#define DP_CONF_SIGNALING_GEN_2 BIT(3) /* Reserved after v1.0b */
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#define DP_CONF_PIN_ASSIGNEMENT_SHIFT 8
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#define DP_CONF_PIN_ASSIGNEMENT_MASK GENMASK(15, 8)
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/* Helper for setting/getting the pin assignement value to the configuration */
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#define DP_CONF_SET_PIN_ASSIGN(_a_) ((_a_) << 8)
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#define DP_CONF_GET_PIN_ASSIGN(_conf_) (((_conf_) & GENMASK(15, 8)) >> 8)
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#endif /* __USB_TYPEC_DP_H */
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