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From: Ajay Gupta <ajaykuee@gmail.com>
To: heikki.krogerus@linux.intel.com
Cc: linux-usb@vger.kernel.org, Ajay Gupta <ajayg@nvidia.com>
Subject: [PATCH 1/2] usb: typec: ucsi: register DP only for NVIDIA DP VDO
Date: Wed, 15 Jan 2020 17:32:46 -0800
Message-ID: <20200116013247.16507-1-ajayg@nvidia.com> (raw)

From: Ajay Gupta <ajayg@nvidia.com>

NVIDIA VirtualLink (svid 0x955) has two altmode with vdo values
of vdo=0x1 for VirtualLink DP mode and vdo=0x3 for NVIDIA test
mode. Register display altmode driver only for vdo=0x1

Signed-off-by: Ajay Gupta <ajayg@nvidia.com>
---
 drivers/usb/typec/ucsi/ucsi.c | 12 ++++++++++--
 include/linux/usb/typec_dp.h  |  2 ++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index d5a6aac86327..eca9d598a42f 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -270,9 +270,16 @@ 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;
+		case USB_TYPEC_NVIDIA_VLINK_SID:
+			if (desc->vdo == USB_TYPEC_NVIDIA_VLINK_DBG_VDO)
+				alt = typec_port_register_altmode(con->port,
+								  desc);
+			else
+				alt = ucsi_register_displayport(con, override,
+								i, desc);
+			break;
 		default:
 			alt = typec_port_register_altmode(con->port, desc);
 			break;
@@ -475,7 +482,8 @@ 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_NVIDIA_VLINK_SID)) {
+			(adev[i]->svid == USB_TYPEC_NVIDIA_VLINK_SID &&
+			adev[i]->vdo != USB_TYPEC_NVIDIA_VLINK_DBG_VDO))) {
 			pdev = typec_altmode_get_partner(adev[i]);
 			ucsi_displayport_remove_partner((void *)pdev);
 		}
diff --git a/include/linux/usb/typec_dp.h b/include/linux/usb/typec_dp.h
index fc4c7edb2e8a..848321c4498e 100644
--- a/include/linux/usb/typec_dp.h
+++ b/include/linux/usb/typec_dp.h
@@ -10,6 +10,8 @@
  * IDs as the SVID.
  */
 #define USB_TYPEC_NVIDIA_VLINK_SID	0x955	/* NVIDIA VirtualLink */
+#define USB_TYPEC_NVIDIA_VLINK_DP_VDO	0x1
+#define USB_TYPEC_NVIDIA_VLINK_DBG_VDO	0x3
 #define USB_TYPEC_DP_MODE	1
 
 /*
-- 
2.17.1


             reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16  1:32 Ajay Gupta [this message]
2020-01-16  1:32 ` [PATCH 2/2] usb: ucsi: ccg: disable runtime pm during fw flashing Ajay Gupta

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