forked from luck/tmp_suning_uos_patched
usb: typec: Add driver for DisplayPort alternate mode
DisplayPort USB Type-C Alt Mode allows DisplayPort displays and adapters to be attached to the USB Type-C ports on the system. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus
Greg Kroah-Hartman
parent
8a37d87d72
commit
0e3bb7d689
49
Documentation/ABI/testing/sysfs-driver-typec-displayport
Normal file
49
Documentation/ABI/testing/sysfs-driver-typec-displayport
Normal file
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@ -0,0 +1,49 @@
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What: /sys/bus/typec/devices/.../displayport/configuration
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Date: July 2018
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Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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Description:
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Shows the current DisplayPort configuration for the connector.
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Valid values are USB, source and sink. Source means DisplayPort
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source, and sink means DisplayPort sink.
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All supported configurations are listed as space separated list
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with the active one wrapped in square brackets.
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Source example:
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USB [source] sink
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The configuration can be changed by writing to the file
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Note. USB configuration does not equal to Exit Mode. It is
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separate configuration defined in VESA DisplayPort Alt Mode on
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USB Type-C Standard. Functionally it equals to the situation
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where the mode has been exited (to exit the mode, see
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Documentation/ABI/testing/sysfs-bus-typec, and use file
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/sys/bus/typec/devices/.../active).
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What: /sys/bus/typec/devices/.../displayport/pin_assignment
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Date: July 2018
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Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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Description:
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VESA DisplayPort Alt Mode on USB Type-C Standard defines six
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different pin assignments for USB Type-C connector that are
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labeled A, B, C, D, E, and F. The supported pin assignments are
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listed as space separated list with the active one wrapped in
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square brackets.
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Example:
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C [D]
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Pin assignment can be changed by writing to the file. It is
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possible to set pin assignment before configuration has been
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set, but the assignment will not be active before the
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connector is actually configured.
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Note. As of VESA DisplayPort Alt Mode on USB Type-C Standard
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version 1.0b, pin assignments A, B, and F are deprecated. Only
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pin assignment D can now carry simultaneously one channel of
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USB SuperSpeed protocol. From user perspective pin assignments C
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and E are equal, where all channels on the connector are used
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for carrying DisplayPort protocol (allowing higher resolutions).
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@ -104,4 +104,6 @@ config TYPEC_TPS6598X
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source "drivers/usb/typec/mux/Kconfig"
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source "drivers/usb/typec/altmodes/Kconfig"
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endif # TYPEC
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@ -1,6 +1,7 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_TYPEC) += typec.o
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typec-y := class.o mux.o bus.o
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obj-$(CONFIG_TYPEC) += altmodes/
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obj-$(CONFIG_TYPEC_TCPM) += tcpm.o
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obj-y += fusb302/
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obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o
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14
drivers/usb/typec/altmodes/Kconfig
Normal file
14
drivers/usb/typec/altmodes/Kconfig
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@ -0,0 +1,14 @@
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menu "USB Type-C Alternate Mode drivers"
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config TYPEC_DP_ALTMODE
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tristate "DisplayPort Alternate Mode driver"
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help
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DisplayPort USB Type-C Alternate Mode allows DisplayPort
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displays and adapters to be attached to the USB Type-C
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connectors on the system.
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To compile this driver as a module, choose M here: the
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module will be called typec_displayport.
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endmenu
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2
drivers/usb/typec/altmodes/Makefile
Normal file
2
drivers/usb/typec/altmodes/Makefile
Normal file
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@ -0,0 +1,2 @@
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obj-$(CONFIG_TYPEC_DP_ALTMODE) += typec_displayport.o
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typec_displayport-y := displayport.o
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578
drivers/usb/typec/altmodes/displayport.c
Normal file
578
drivers/usb/typec/altmodes/displayport.c
Normal file
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@ -0,0 +1,578 @@
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// SPDX-License-Identifier: GPL-2.0
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/**
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* USB Typec-C DisplayPort Alternate Mode driver
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*
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* Copyright (C) 2018 Intel Corporation
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* Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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*
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* DisplayPort is trademark of VESA (www.vesa.org)
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*/
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/module.h>
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#include <linux/usb/pd_vdo.h>
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#include <linux/usb/typec_dp.h>
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#define DP_HEADER(cmd) (VDO(USB_TYPEC_DP_SID, 1, cmd) | \
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VDO_OPOS(USB_TYPEC_DP_MODE))
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enum {
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DP_CONF_USB,
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DP_CONF_DFP_D,
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DP_CONF_UFP_D,
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DP_CONF_DUAL_D,
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};
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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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/* Pin assignments that use USB3.1 Gen2 signaling to carry DP protocol */
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#define DP_PIN_ASSIGN_GEN2_BR_MASK (BIT(DP_PIN_ASSIGN_A) | \
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BIT(DP_PIN_ASSIGN_B))
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/* Pin assignments that use DP v1.3 signaling to carry DP protocol */
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#define DP_PIN_ASSIGN_DP_BR_MASK (BIT(DP_PIN_ASSIGN_C) | \
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BIT(DP_PIN_ASSIGN_D) | \
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BIT(DP_PIN_ASSIGN_E) | \
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BIT(DP_PIN_ASSIGN_F))
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/* DP only pin assignments */
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#define DP_PIN_ASSIGN_DP_ONLY_MASK (BIT(DP_PIN_ASSIGN_A) | \
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BIT(DP_PIN_ASSIGN_C) | \
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BIT(DP_PIN_ASSIGN_E))
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/* Pin assignments where one channel is for USB */
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#define DP_PIN_ASSIGN_MULTI_FUNC_MASK (BIT(DP_PIN_ASSIGN_B) | \
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BIT(DP_PIN_ASSIGN_D) | \
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BIT(DP_PIN_ASSIGN_F))
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enum dp_state {
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DP_STATE_IDLE,
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DP_STATE_ENTER,
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DP_STATE_UPDATE,
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DP_STATE_CONFIGURE,
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DP_STATE_EXIT,
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};
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struct dp_altmode {
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struct typec_displayport_data data;
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enum dp_state state;
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struct mutex lock; /* device lock */
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struct work_struct work;
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struct typec_altmode *alt;
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const struct typec_altmode *port;
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};
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static int dp_altmode_notify(struct dp_altmode *dp)
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{
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u8 state = get_count_order(DP_CONF_GET_PIN_ASSIGN(dp->data.conf));
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return typec_altmode_notify(dp->alt, TYPEC_MODAL_STATE(state),
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&dp->data);
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}
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static int dp_altmode_configure(struct dp_altmode *dp, u8 con)
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{
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u32 conf = DP_CONF_SIGNALING_DP; /* Only DP signaling supported */
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u8 pin_assign = 0;
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switch (con) {
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case DP_STATUS_CON_DISABLED:
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return 0;
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case DP_STATUS_CON_DFP_D:
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conf |= DP_CONF_UFP_U_AS_DFP_D;
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pin_assign = DP_CAP_UFP_D_PIN_ASSIGN(dp->alt->vdo) &
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DP_CAP_DFP_D_PIN_ASSIGN(dp->port->vdo);
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break;
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case DP_STATUS_CON_UFP_D:
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case DP_STATUS_CON_BOTH: /* NOTE: First acting as DP source */
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conf |= DP_CONF_UFP_U_AS_UFP_D;
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pin_assign = DP_CAP_DFP_D_PIN_ASSIGN(dp->alt->vdo) &
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DP_CAP_UFP_D_PIN_ASSIGN(dp->port->vdo);
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break;
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default:
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break;
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}
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/* Determining the initial pin assignment. */
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if (!DP_CONF_GET_PIN_ASSIGN(dp->data.conf)) {
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/* Is USB together with DP preferred */
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if (dp->data.status & DP_STATUS_PREFER_MULTI_FUNC &&
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pin_assign & DP_PIN_ASSIGN_MULTI_FUNC_MASK)
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pin_assign &= DP_PIN_ASSIGN_MULTI_FUNC_MASK;
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else
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pin_assign &= DP_PIN_ASSIGN_DP_ONLY_MASK;
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if (!pin_assign)
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return -EINVAL;
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conf |= DP_CONF_SET_PIN_ASSIGN(pin_assign);
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}
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dp->data.conf = conf;
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return 0;
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}
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static int dp_altmode_status_update(struct dp_altmode *dp)
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{
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bool configured = !!DP_CONF_GET_PIN_ASSIGN(dp->data.conf);
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u8 con = DP_STATUS_CONNECTION(dp->data.status);
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int ret = 0;
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if (configured && (dp->data.status & DP_STATUS_SWITCH_TO_USB)) {
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dp->data.conf = 0;
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dp->state = DP_STATE_CONFIGURE;
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} else if (dp->data.status & DP_STATUS_EXIT_DP_MODE) {
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dp->state = DP_STATE_EXIT;
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} else if (!(con & DP_CONF_CURRENTLY(dp->data.conf))) {
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ret = dp_altmode_configure(dp, con);
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if (!ret)
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dp->state = DP_STATE_CONFIGURE;
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}
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return ret;
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}
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static int dp_altmode_configured(struct dp_altmode *dp)
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{
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int ret;
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sysfs_notify(&dp->alt->dev.kobj, "displayport", "configuration");
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if (!dp->data.conf)
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return typec_altmode_notify(dp->alt, TYPEC_STATE_USB,
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&dp->data);
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ret = dp_altmode_notify(dp);
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if (ret)
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return ret;
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sysfs_notify(&dp->alt->dev.kobj, "displayport", "pin_assignment");
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return 0;
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}
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static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf)
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{
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u32 header = DP_HEADER(DP_CMD_CONFIGURE);
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int ret;
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ret = typec_altmode_notify(dp->alt, TYPEC_STATE_SAFE, &dp->data);
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if (ret) {
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dev_err(&dp->alt->dev,
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"unable to put to connector to safe mode\n");
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return ret;
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}
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ret = typec_altmode_vdm(dp->alt, header, &conf, 2);
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if (ret) {
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if (DP_CONF_GET_PIN_ASSIGN(dp->data.conf))
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dp_altmode_notify(dp);
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else
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typec_altmode_notify(dp->alt, TYPEC_STATE_USB,
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&dp->data);
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}
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return ret;
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}
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static void dp_altmode_work(struct work_struct *work)
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{
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struct dp_altmode *dp = container_of(work, struct dp_altmode, work);
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u32 header;
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u32 vdo;
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int ret;
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mutex_lock(&dp->lock);
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switch (dp->state) {
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case DP_STATE_ENTER:
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ret = typec_altmode_enter(dp->alt);
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if (ret)
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dev_err(&dp->alt->dev, "failed to enter mode\n");
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break;
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case DP_STATE_UPDATE:
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header = DP_HEADER(DP_CMD_STATUS_UPDATE);
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vdo = 1;
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ret = typec_altmode_vdm(dp->alt, header, &vdo, 2);
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if (ret)
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dev_err(&dp->alt->dev,
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"unable to send Status Update command (%d)\n",
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ret);
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break;
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case DP_STATE_CONFIGURE:
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ret = dp_altmode_configure_vdm(dp, dp->data.conf);
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if (ret)
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dev_err(&dp->alt->dev,
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"unable to send Configure command (%d)\n", ret);
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break;
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case DP_STATE_EXIT:
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if (typec_altmode_exit(dp->alt))
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dev_err(&dp->alt->dev, "Exit Mode Failed!\n");
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break;
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default:
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break;
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}
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dp->state = DP_STATE_IDLE;
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mutex_unlock(&dp->lock);
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}
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static void dp_altmode_attention(struct typec_altmode *alt, const u32 vdo)
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{
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struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
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u8 old_state;
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mutex_lock(&dp->lock);
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old_state = dp->state;
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dp->data.status = vdo;
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if (old_state != DP_STATE_IDLE)
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dev_warn(&alt->dev, "ATTENTION while processing state %d\n",
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old_state);
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if (dp_altmode_status_update(dp))
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dev_warn(&alt->dev, "%s: status update failed\n", __func__);
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if (dp_altmode_notify(dp))
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dev_err(&alt->dev, "%s: notification failed\n", __func__);
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if (old_state == DP_STATE_IDLE && dp->state != DP_STATE_IDLE)
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schedule_work(&dp->work);
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mutex_unlock(&dp->lock);
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}
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static int dp_altmode_vdm(struct typec_altmode *alt,
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const u32 hdr, const u32 *vdo, int count)
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{
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struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
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int cmd_type = PD_VDO_CMDT(hdr);
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int cmd = PD_VDO_CMD(hdr);
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int ret = 0;
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mutex_lock(&dp->lock);
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if (dp->state != DP_STATE_IDLE) {
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ret = -EBUSY;
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goto err_unlock;
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}
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switch (cmd_type) {
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case CMDT_RSP_ACK:
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switch (cmd) {
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case CMD_ENTER_MODE:
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dp->state = DP_STATE_UPDATE;
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break;
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case CMD_EXIT_MODE:
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dp->data.status = 0;
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dp->data.conf = 0;
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break;
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case DP_CMD_STATUS_UPDATE:
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dp->data.status = *vdo;
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ret = dp_altmode_status_update(dp);
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break;
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case DP_CMD_CONFIGURE:
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ret = dp_altmode_configured(dp);
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break;
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default:
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break;
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}
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break;
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case CMDT_RSP_NAK:
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switch (cmd) {
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case DP_CMD_CONFIGURE:
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dp->data.conf = 0;
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ret = dp_altmode_configured(dp);
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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|
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if (dp->state != DP_STATE_IDLE)
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schedule_work(&dp->work);
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err_unlock:
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mutex_unlock(&dp->lock);
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return ret;
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}
|
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static int dp_altmode_activate(struct typec_altmode *alt, int activate)
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{
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return activate ? typec_altmode_enter(alt) : typec_altmode_exit(alt);
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}
|
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|
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static const struct typec_altmode_ops dp_altmode_ops = {
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.attention = dp_altmode_attention,
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.vdm = dp_altmode_vdm,
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.activate = dp_altmode_activate,
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};
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static const char * const configurations[] = {
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[DP_CONF_USB] = "USB",
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[DP_CONF_DFP_D] = "source",
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[DP_CONF_UFP_D] = "sink",
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};
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|
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static ssize_t
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configuration_store(struct device *dev, struct device_attribute *attr,
|
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const char *buf, size_t size)
|
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{
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struct dp_altmode *dp = dev_get_drvdata(dev);
|
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u32 conf;
|
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u32 cap;
|
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int con;
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int ret;
|
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|
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con = sysfs_match_string(configurations, buf);
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if (con < 0)
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return con;
|
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|
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mutex_lock(&dp->lock);
|
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|
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if (dp->state != DP_STATE_IDLE) {
|
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ret = -EBUSY;
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goto err_unlock;
|
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}
|
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|
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cap = DP_CAP_CAPABILITY(dp->alt->vdo);
|
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|
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if ((con == DP_CONF_DFP_D && !(cap & DP_CAP_DFP_D)) ||
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(con == DP_CONF_UFP_D && !(cap & DP_CAP_UFP_D)))
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return -EINVAL;
|
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|
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conf = dp->data.conf & ~DP_CONF_DUAL_D;
|
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conf |= con;
|
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|
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if (dp->alt->active) {
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ret = dp_altmode_configure_vdm(dp, conf);
|
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if (ret)
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goto err_unlock;
|
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}
|
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|
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dp->data.conf = conf;
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|
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err_unlock:
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mutex_unlock(&dp->lock);
|
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|
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return ret ? ret : size;
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}
|
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|
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static ssize_t configuration_show(struct device *dev,
|
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struct device_attribute *attr, char *buf)
|
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{
|
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struct dp_altmode *dp = dev_get_drvdata(dev);
|
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int len;
|
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u8 cap;
|
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u8 cur;
|
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int i;
|
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|
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mutex_lock(&dp->lock);
|
||||
|
||||
cap = DP_CAP_CAPABILITY(dp->alt->vdo);
|
||||
cur = DP_CONF_CURRENTLY(dp->data.conf);
|
||||
|
||||
len = sprintf(buf, "%s ", cur ? "USB" : "[USB]");
|
||||
|
||||
for (i = 1; i < ARRAY_SIZE(configurations); i++) {
|
||||
if (i == cur)
|
||||
len += sprintf(buf + len, "[%s] ", configurations[i]);
|
||||
else if ((i == DP_CONF_DFP_D && cap & DP_CAP_DFP_D) ||
|
||||
(i == DP_CONF_UFP_D && cap & DP_CAP_UFP_D))
|
||||
len += sprintf(buf + len, "%s ", configurations[i]);
|
||||
}
|
||||
|
||||
mutex_unlock(&dp->lock);
|
||||
|
||||
buf[len - 1] = '\n';
|
||||
return len;
|
||||
}
|
||||
static DEVICE_ATTR_RW(configuration);
|
||||
|
||||
static const char * const pin_assignments[] = {
|
||||
[DP_PIN_ASSIGN_A] = "A",
|
||||
[DP_PIN_ASSIGN_B] = "B",
|
||||
[DP_PIN_ASSIGN_C] = "C",
|
||||
[DP_PIN_ASSIGN_D] = "D",
|
||||
[DP_PIN_ASSIGN_E] = "E",
|
||||
[DP_PIN_ASSIGN_F] = "F",
|
||||
};
|
||||
|
||||
static ssize_t
|
||||
pin_assignment_store(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t size)
|
||||
{
|
||||
struct dp_altmode *dp = dev_get_drvdata(dev);
|
||||
u8 assignments;
|
||||
u32 conf;
|
||||
int ret;
|
||||
|
||||
ret = sysfs_match_string(pin_assignments, buf);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
conf = DP_CONF_SET_PIN_ASSIGN(BIT(ret));
|
||||
ret = 0;
|
||||
|
||||
mutex_lock(&dp->lock);
|
||||
|
||||
if (conf & dp->data.conf)
|
||||
goto out_unlock;
|
||||
|
||||
if (dp->state != DP_STATE_IDLE) {
|
||||
ret = -EBUSY;
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
if (DP_CONF_CURRENTLY(dp->data.conf) == DP_CONF_DFP_D)
|
||||
assignments = DP_CAP_UFP_D_PIN_ASSIGN(dp->alt->vdo);
|
||||
else
|
||||
assignments = DP_CAP_DFP_D_PIN_ASSIGN(dp->alt->vdo);
|
||||
|
||||
if (!(DP_CONF_GET_PIN_ASSIGN(conf) & assignments)) {
|
||||
ret = -EINVAL;
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
conf |= dp->data.conf & ~DP_CONF_PIN_ASSIGNEMENT_MASK;
|
||||
|
||||
/* Only send Configure command if a configuration has been set */
|
||||
if (dp->alt->active && DP_CONF_CURRENTLY(dp->data.conf)) {
|
||||
ret = dp_altmode_configure_vdm(dp, conf);
|
||||
if (ret)
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
dp->data.conf = conf;
|
||||
|
||||
out_unlock:
|
||||
mutex_unlock(&dp->lock);
|
||||
|
||||
return ret ? ret : size;
|
||||
}
|
||||
|
||||
static ssize_t pin_assignment_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct dp_altmode *dp = dev_get_drvdata(dev);
|
||||
u8 assignments;
|
||||
int len = 0;
|
||||
u8 cur;
|
||||
int i;
|
||||
|
||||
mutex_lock(&dp->lock);
|
||||
|
||||
cur = get_count_order(DP_CONF_GET_PIN_ASSIGN(dp->data.conf));
|
||||
|
||||
if (DP_CONF_CURRENTLY(dp->data.conf) == DP_CONF_DFP_D)
|
||||
assignments = DP_CAP_UFP_D_PIN_ASSIGN(dp->alt->vdo);
|
||||
else
|
||||
assignments = DP_CAP_DFP_D_PIN_ASSIGN(dp->alt->vdo);
|
||||
|
||||
for (i = 0; assignments; assignments >>= 1, i++) {
|
||||
if (assignments & 1) {
|
||||
if (i == cur)
|
||||
len += sprintf(buf + len, "[%s] ",
|
||||
pin_assignments[i]);
|
||||
else
|
||||
len += sprintf(buf + len, "%s ",
|
||||
pin_assignments[i]);
|
||||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&dp->lock);
|
||||
|
||||
buf[len - 1] = '\n';
|
||||
return len;
|
||||
}
|
||||
static DEVICE_ATTR_RW(pin_assignment);
|
||||
|
||||
static struct attribute *dp_altmode_attrs[] = {
|
||||
&dev_attr_configuration.attr,
|
||||
&dev_attr_pin_assignment.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group dp_altmode_group = {
|
||||
.name = "displayport",
|
||||
.attrs = dp_altmode_attrs,
|
||||
};
|
||||
|
||||
static int dp_altmode_probe(struct typec_altmode *alt)
|
||||
{
|
||||
const struct typec_altmode *port = typec_altmode_get_partner(alt);
|
||||
struct dp_altmode *dp;
|
||||
int ret;
|
||||
|
||||
/* FIXME: Port can only be DFP_U. */
|
||||
|
||||
/* Make sure we have compatiple pin configurations */
|
||||
if (!(DP_CAP_DFP_D_PIN_ASSIGN(port->vdo) &
|
||||
DP_CAP_UFP_D_PIN_ASSIGN(alt->vdo)) &&
|
||||
!(DP_CAP_UFP_D_PIN_ASSIGN(port->vdo) &
|
||||
DP_CAP_DFP_D_PIN_ASSIGN(alt->vdo)))
|
||||
return -ENODEV;
|
||||
|
||||
ret = sysfs_create_group(&alt->dev.kobj, &dp_altmode_group);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
dp = devm_kzalloc(&alt->dev, sizeof(*dp), GFP_KERNEL);
|
||||
if (!dp)
|
||||
return -ENOMEM;
|
||||
|
||||
INIT_WORK(&dp->work, dp_altmode_work);
|
||||
mutex_init(&dp->lock);
|
||||
dp->port = port;
|
||||
dp->alt = alt;
|
||||
|
||||
alt->desc = "DisplayPort";
|
||||
alt->ops = &dp_altmode_ops;
|
||||
|
||||
typec_altmode_set_drvdata(alt, dp);
|
||||
|
||||
dp->state = DP_STATE_ENTER;
|
||||
schedule_work(&dp->work);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void dp_altmode_remove(struct typec_altmode *alt)
|
||||
{
|
||||
struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
|
||||
|
||||
sysfs_remove_group(&alt->dev.kobj, &dp_altmode_group);
|
||||
cancel_work_sync(&dp->work);
|
||||
}
|
||||
|
||||
static const struct typec_device_id dp_typec_id[] = {
|
||||
{ USB_TYPEC_DP_SID, USB_TYPEC_DP_MODE },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(typec, dp_typec_id);
|
||||
|
||||
static struct typec_altmode_driver dp_altmode_driver = {
|
||||
.id_table = dp_typec_id,
|
||||
.probe = dp_altmode_probe,
|
||||
.remove = dp_altmode_remove,
|
||||
.driver = {
|
||||
.name = "typec_displayport",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
module_typec_altmode_driver(dp_altmode_driver);
|
||||
|
||||
MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_DESCRIPTION("DisplayPort Alternate Mode");
|
||||
95
include/linux/usb/typec_dp.h
Normal file
95
include/linux/usb/typec_dp.h
Normal file
|
|
@ -0,0 +1,95 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef __USB_TYPEC_DP_H
|
||||
#define __USB_TYPEC_DP_H
|
||||
|
||||
#include <linux/usb/typec_altmode.h>
|
||||
|
||||
#define USB_TYPEC_DP_SID 0xff01
|
||||
#define USB_TYPEC_DP_MODE 1
|
||||
|
||||
/*
|
||||
* Connector states matching the pin assignments in DisplayPort Alt Mode
|
||||
* Specification.
|
||||
*
|
||||
* These values are meant primarily to be used by the mux drivers, but they are
|
||||
* also used as the "value" part in the alternate mode notification chain, so
|
||||
* receivers of those notifications will always see them.
|
||||
*
|
||||
* Note. DisplayPort USB Type-C Alt Mode Specification version 1.0b deprecated
|
||||
* pin assignments A, B and F, but they are still defined here for legacy
|
||||
* purposes.
|
||||
*/
|
||||
enum {
|
||||
TYPEC_DP_STATE_A = TYPEC_STATE_MODAL, /* Not supported after v1.0b */
|
||||
TYPEC_DP_STATE_B, /* Not supported after v1.0b */
|
||||
TYPEC_DP_STATE_C,
|
||||
TYPEC_DP_STATE_D,
|
||||
TYPEC_DP_STATE_E,
|
||||
TYPEC_DP_STATE_F, /* Not supported after v1.0b */
|
||||
};
|
||||
|
||||
/*
|
||||
* struct typec_displayport_data - DisplayPort Alt Mode specific data
|
||||
* @status: Status Update command VDO content
|
||||
* @conf: Configure command VDO content
|
||||
*
|
||||
* This structure is delivered as the data part with the notifications. It
|
||||
* contains the VDOs from the two DisplayPort Type-C alternate mode specific
|
||||
* commands: Status Update and Configure.
|
||||
*
|
||||
* @status will show for example the status of the HPD signal.
|
||||
*/
|
||||
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 */
|
||||
};
|
||||
|
||||
/* 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_SIGNALING BIT(2) /* Always set */
|
||||
#define DP_CAP_GEN2 BIT(3) /* Reserved after v1.0b */
|
||||
#define DP_CAP_RECEPTACLE BIT(6)
|
||||
#define DP_CAP_USB BIT(7)
|
||||
#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(15, 8)) >> 8)
|
||||
#define DP_CAP_UFP_D_PIN_ASSIGN(_cap_) (((_cap_) & GENMASK(23, 16)) >> 16)
|
||||
|
||||
/* 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_SIGNALING_DP BIT(2)
|
||||
#define DP_CONF_SIGNALING_GEN_2 BIT(3) /* Reserved after v1.0b */
|
||||
#define DP_CONF_PIN_ASSIGNEMENT_SHIFT 8
|
||||
#define DP_CONF_PIN_ASSIGNEMENT_MASK GENMASK(15, 8)
|
||||
|
||||
#endif /* __USB_TYPEC_DP_H */
|
||||
Loading…
Reference in New Issue
Block a user