linux-kernel - [PATCH v6 5/7] usb: typec: displayport: Fill the negotiated SVDM Version in the header

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Message-Id: <20210205033415.3320439-6-kyletso@google.com>
Date:   Fri,  5 Feb 2021 11:34:13 +0800
From:   Kyle Tso <kyletso@...gle.com>
To:     linux@...ck-us.net, heikki.krogerus@...ux.intel.com,
        gregkh@...uxfoundation.org, hdegoede@...hat.com, robh+dt@...nel.org
Cc:     badhri@...gle.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Kyle Tso <kyletso@...gle.com>
Subject: [PATCH v6 5/7] usb: typec: displayport: Fill the negotiated SVDM
 Version in the header

VDM header now requires SVDM Version. Get it from typec_partner.

Signed-off-by: Kyle Tso <kyletso@...gle.com>
---
Changes since v5:
- follow the changes of "usb: typec: Manage SVDM version"

 drivers/usb/typec/altmodes/displayport.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/typec/altmodes/displayport.c b/drivers/usb/typec/altmodes/displayport.c
index 0abc3121238f..b7f094435b00 100644
--- a/drivers/usb/typec/altmodes/displayport.c
+++ b/drivers/usb/typec/altmodes/displayport.c
@@ -15,8 +15,8 @@
 #include <linux/usb/typec_dp.h>
 #include "displayport.h"
 
-#define DP_HEADER(_dp, cmd)		(VDO((_dp)->alt->svid, 1, SVDM_VER_1_0, cmd) | \
-					 VDO_OPOS(USB_TYPEC_DP_MODE))
+#define DP_HEADER(_dp, ver, cmd)	(VDO((_dp)->alt->svid, 1, ver, cmd)	\
+					 | VDO_OPOS(USB_TYPEC_DP_MODE))
 
 enum {
 	DP_CONF_USB,
@@ -156,9 +156,14 @@ static int dp_altmode_configured(struct dp_altmode *dp)
 
 static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf)
 {
-	u32 header = DP_HEADER(dp, DP_CMD_CONFIGURE);
+	int svdm_version = typec_altmode_get_svdm_version(dp->alt);
+	u32 header;
 	int ret;
 
+	if (svdm_version < 0)
+		return svdm_version;
+
+	header = DP_HEADER(dp, svdm_version, DP_CMD_CONFIGURE);
 	ret = typec_altmode_notify(dp->alt, TYPEC_STATE_SAFE, &dp->data);
 	if (ret) {
 		dev_err(&dp->alt->dev,
@@ -181,6 +186,7 @@ static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf)
 static void dp_altmode_work(struct work_struct *work)
 {
 	struct dp_altmode *dp = container_of(work, struct dp_altmode, work);
+	int svdm_version;
 	u32 header;
 	u32 vdo;
 	int ret;
@@ -194,7 +200,10 @@ static void dp_altmode_work(struct work_struct *work)
 			dev_err(&dp->alt->dev, "failed to enter mode\n");
 		break;
 	case DP_STATE_UPDATE:
-		header = DP_HEADER(dp, DP_CMD_STATUS_UPDATE);
+		svdm_version = typec_altmode_get_svdm_version(dp->alt);
+		if (svdm_version < 0)
+			break;
+		header = DP_HEADER(dp, svdm_version, DP_CMD_STATUS_UPDATE);
 		vdo = 1;
 		ret = typec_altmode_vdm(dp->alt, header, &vdo, 2);
 		if (ret)
-- 
2.30.0.365.g02bc693789-goog