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authorAjay Gupta <ajayg@nvidia.com>2019-04-23 17:21:51 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-25 11:04:56 +0200
commitcf28369c634fafb5f4e81750cba6988cdb4b4490 (patch)
tree3edcbf058cd44f61456b53643828617b16e16034 /drivers/usb/typec
parentd266e96820cc3654ba1338c55e5731fc67030d8e (diff)
downloadblackbird-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/Kconfig10
-rw-r--r--drivers/usb/typec/altmodes/Makefile2
-rw-r--r--drivers/usb/typec/altmodes/nvidia.c44
-rw-r--r--drivers/usb/typec/ucsi/ucsi.c4
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);
}
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