diff options
author | Ajay Gupta <ajayg@nvidia.com> | 2019-04-23 17:21:51 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 11:04:56 +0200 |
commit | cf28369c634fafb5f4e81750cba6988cdb4b4490 (patch) | |
tree | 3edcbf058cd44f61456b53643828617b16e16034 /drivers/usb/typec | |
parent | d266e96820cc3654ba1338c55e5731fc67030d8e (diff) | |
download | blackbird-op-linux-cf28369c634fafb5f4e81750cba6988cdb4b4490.tar.gz blackbird-op-linux-cf28369c634fafb5f4e81750cba6988cdb4b4490.zip |
usb: typec: Add driver for NVIDIA Alt Modes
Latest NVIDIA GPUs support VirtualLink device. Since USBIF
has not assigned a Standard ID (SID) for VirtualLink
so using NVIDA VID 0x955 as SVID.
Signed-off-by: Ajay Gupta <ajayg@nvidia.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/typec')
-rw-r--r-- | drivers/usb/typec/altmodes/Kconfig | 10 | ||||
-rw-r--r-- | drivers/usb/typec/altmodes/Makefile | 2 | ||||
-rw-r--r-- | drivers/usb/typec/altmodes/nvidia.c | 44 | ||||
-rw-r--r-- | drivers/usb/typec/ucsi/ucsi.c | 4 |
4 files changed, 59 insertions, 1 deletions
diff --git a/drivers/usb/typec/altmodes/Kconfig b/drivers/usb/typec/altmodes/Kconfig index ef2226eb7a33..187690fd1a5b 100644 --- a/drivers/usb/typec/altmodes/Kconfig +++ b/drivers/usb/typec/altmodes/Kconfig @@ -12,4 +12,14 @@ config TYPEC_DP_ALTMODE To compile this driver as a module, choose M here: the module will be called typec_displayport. +config TYPEC_NVIDIA_ALTMODE + tristate "NVIDIA Alternate Mode driver" + depends on TYPEC_DP_ALTMODE + help + Latest NVIDIA GPUs support VirtualLink devices. Select this + to enable support for VirtualLink devices with NVIDIA GPUs. + + To compile this driver as a module, choose M here: the + module will be called typec_displayport. + endmenu diff --git a/drivers/usb/typec/altmodes/Makefile b/drivers/usb/typec/altmodes/Makefile index eda8456f1c92..45717548b396 100644 --- a/drivers/usb/typec/altmodes/Makefile +++ b/drivers/usb/typec/altmodes/Makefile @@ -2,3 +2,5 @@ obj-$(CONFIG_TYPEC_DP_ALTMODE) += typec_displayport.o typec_displayport-y := displayport.o +obj-$(CONFIG_TYPEC_NVIDIA_ALTMODE) += typec_nvidia.o +typec_nvidia-y := nvidia.o diff --git a/drivers/usb/typec/altmodes/nvidia.c b/drivers/usb/typec/altmodes/nvidia.c new file mode 100644 index 000000000000..c36769736405 --- /dev/null +++ b/drivers/usb/typec/altmodes/nvidia.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 NVIDIA Corporation. All rights reserved. + * + * NVIDIA USB Type-C Alt Mode Driver + */ +#include <linux/module.h> +#include <linux/usb/typec_altmode.h> +#include <linux/usb/typec_dp.h> +#include "displayport.h" + +static int nvidia_altmode_probe(struct typec_altmode *alt) +{ + if (alt->svid == USB_TYPEC_NVIDIA_VLINK_SID) + return dp_altmode_probe(alt); + else + return -ENOTSUPP; +} + +static void nvidia_altmode_remove(struct typec_altmode *alt) +{ + if (alt->svid == USB_TYPEC_NVIDIA_VLINK_SID) + dp_altmode_remove(alt); +} + +static const struct typec_device_id nvidia_typec_id[] = { + { USB_TYPEC_NVIDIA_VLINK_SID, TYPEC_ANY_MODE }, + { }, +}; +MODULE_DEVICE_TABLE(typec, nvidia_typec_id); + +static struct typec_altmode_driver nvidia_altmode_driver = { + .id_table = nvidia_typec_id, + .probe = nvidia_altmode_probe, + .remove = nvidia_altmode_remove, + .driver = { + .name = "typec_nvidia", + .owner = THIS_MODULE, + }, +}; +module_typec_altmode_driver(nvidia_altmode_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("NVIDIA USB Type-C Alt Mode Driver"); diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index b4fb2e05d2e5..7850b851cecd 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -283,6 +283,7 @@ static int ucsi_register_altmode(struct ucsi_connector *con, switch (desc->svid) { case USB_TYPEC_DP_SID: + case USB_TYPEC_NVIDIA_VLINK_SID: alt = ucsi_register_displayport(con, override, i, desc); break; default: @@ -404,7 +405,8 @@ static void ucsi_unregister_altmodes(struct ucsi_connector *con, u8 recipient) while (adev[i]) { if (recipient == UCSI_RECIPIENT_SOP && - adev[i]->svid == USB_TYPEC_DP_SID) { + (adev[i]->svid == USB_TYPEC_DP_SID || + adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID)) { pdev = typec_altmode_get_partner(adev[i]); ucsi_displayport_remove_partner((void *)pdev); } |