include/linux/usb/typec_dp.h

Source file repositories/reference/linux-study-clean/include/linux/usb/typec_dp.h

File Facts

System
Linux kernel
Corpus path
include/linux/usb/typec_dp.h
Extension
.h
Size
4803 bytes
Lines
132
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct typec_displayport_data {
	u32 status;
	u32 conf;
};

enum {
	DP_PIN_ASSIGN_A, /* Not supported after v1.0b */
	DP_PIN_ASSIGN_B, /* Not supported after v1.0b */
	DP_PIN_ASSIGN_C,
	DP_PIN_ASSIGN_D,
	DP_PIN_ASSIGN_E,
	DP_PIN_ASSIGN_F, /* Not supported after v1.0b */
	DP_PIN_ASSIGN_MAX,
};

/* DisplayPort alt mode specific commands */
#define DP_CMD_STATUS_UPDATE		VDO_CMD_VENDOR(0)
#define DP_CMD_CONFIGURE		VDO_CMD_VENDOR(1)

/* DisplayPort Capabilities VDO bits (returned with Discover Modes) */
#define DP_CAP_CAPABILITY(_cap_)	((_cap_) & 3)
#define   DP_CAP_UFP_D			1
#define   DP_CAP_DFP_D			2
#define   DP_CAP_DFP_D_AND_UFP_D	3
#define DP_CAP_DP_SIGNALLING(_cap_)	FIELD_GET(GENMASK(5, 2), _cap_)
#define   DP_CAP_SIGNALLING_HBR3	1
#define   DP_CAP_SIGNALLING_UHBR10	2
#define   DP_CAP_SIGNALLING_UHBR20	3
#define DP_CAP_RECEPTACLE		BIT(6)
#define DP_CAP_USB			BIT(7)
#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_)	FIELD_GET(GENMASK(15, 8), _cap_)
#define DP_CAP_UFP_D_PIN_ASSIGN(_cap_)	FIELD_GET(GENMASK(23, 16), _cap_)
/* Get pin assignment taking plug & receptacle into consideration */
#define DP_CAP_PIN_ASSIGN_UFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
			DP_CAP_UFP_D_PIN_ASSIGN(_cap_) : DP_CAP_DFP_D_PIN_ASSIGN(_cap_))
#define DP_CAP_PIN_ASSIGN_DFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
			DP_CAP_DFP_D_PIN_ASSIGN(_cap_) : DP_CAP_UFP_D_PIN_ASSIGN(_cap_))
#define DP_CAP_UHBR_13_5_SUPPORT	BIT(26)
#define DP_CAP_CABLE_TYPE(_cap_)	FIELD_GET(GENMASK(29, 28), _cap_)
#define   DP_CAP_CABLE_TYPE_PASSIVE	0
#define   DP_CAP_CABLE_TYPE_RE_TIMER	1
#define   DP_CAP_CABLE_TYPE_RE_DRIVER	2
#define   DP_CAP_CABLE_TYPE_OPTICAL	3
#define DP_CAP_DPAM_VERSION		BIT(30)

/* DisplayPort Status Update VDO bits */
#define DP_STATUS_CONNECTION(_status_)	((_status_) & 3)
#define   DP_STATUS_CON_DISABLED	0
#define   DP_STATUS_CON_DFP_D		1
#define   DP_STATUS_CON_UFP_D		2
#define   DP_STATUS_CON_BOTH		3
#define DP_STATUS_POWER_LOW		BIT(2)
#define DP_STATUS_ENABLED		BIT(3)
#define DP_STATUS_PREFER_MULTI_FUNC	BIT(4)
#define DP_STATUS_SWITCH_TO_USB		BIT(5)
#define DP_STATUS_EXIT_DP_MODE		BIT(6)
#define DP_STATUS_HPD_STATE		BIT(7) /* 0 = HPD_Low, 1 = HPD_High */
#define DP_STATUS_IRQ_HPD		BIT(8)

/* DisplayPort Configurations VDO bits */
#define DP_CONF_CURRENTLY(_conf_)	((_conf_) & 3)
#define DP_CONF_UFP_U_AS_DFP_D		BIT(0)
#define DP_CONF_UFP_U_AS_UFP_D		BIT(1)
#define DP_CONF_SIGNALLING_MASK		GENMASK(5, 2)
#define DP_CONF_SIGNALLING_SHIFT	2
#define   DP_CONF_SIGNALLING_HBR3	1
#define   DP_CONF_SIGNALLING_UHBR10	2
#define   DP_CONF_SIGNALLING_UHBR20	3
#define DP_CONF_PIN_ASSIGNEMENT_SHIFT	8
#define DP_CONF_PIN_ASSIGNEMENT_MASK	GENMASK(15, 8)

/* Helper for setting/getting the pin assignment value to the configuration */
#define DP_CONF_SET_PIN_ASSIGN(_a_)	((_a_) << 8)
#define DP_CONF_GET_PIN_ASSIGN(_conf_)	FIELD_GET(GENMASK(15, 8), _conf_)
#define DP_CONF_UHBR13_5_SUPPORT	BIT(26)
#define DP_CONF_CABLE_TYPE_MASK		GENMASK(29, 28)
#define DP_CONF_CABLE_TYPE_SHIFT	28
#define   DP_CONF_CABLE_TYPE_PASSIVE	0
#define   DP_CONF_CABLE_TYPE_RE_TIMER	1
#define   DP_CONF_CABLE_TYPE_RE_DRIVER	2
#define   DP_CONF_CABLE_TYPE_OPTICAL	3
#define DP_CONF_DPAM_VERSION		BIT(30)

#endif /* __USB_TYPEC_DP_H */

Annotation

Implementation Notes