openwrt/target/linux/layerscape/patches-5.4/820-usb-0005-usb-dwc3-add-otg-properties-update.patch

From 504c440dd9c391ed97299a9d4b2e41b3ac3b6211 Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Mon, 28 Jan 2019 15:15:11 +0800
Subject: [PATCH] usb: dwc3: add otg properties update

During the USB certification CV9 test, if we report OTG descriptor
to test suite, it will require doing OTG test, but in fact, it does
not support OTG-compliance in dwc3 driver.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/usb/dwc3/core.c   | 11 +++++++++++
 drivers/usb/dwc3/core.h   |  2 ++
 drivers/usb/dwc3/gadget.c |  4 ++++
 3 files changed, 17 insertions(+)

--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1269,6 +1269,17 @@ static void dwc3_get_properties(struct d
 
 	dwc->maximum_speed = usb_get_maximum_speed(dev);
 	dwc->dr_mode = usb_get_dr_mode(dev);
+	if (dwc->dr_mode == USB_DR_MODE_OTG) {
+		dwc->otg_caps.otg_rev = 0x0300;
+		dwc->otg_caps.hnp_support = true;
+		dwc->otg_caps.srp_support = true;
+		dwc->otg_caps.adp_support = true;
+
+		/* Update otg capabilities by DT properties */
+		of_usb_update_otg_caps(dev->of_node,
+				       &dwc->otg_caps);
+	}
+
 	dwc->hsphy_mode = of_usb_get_phy_mode(dev->of_node);
 
 	dwc->sysdev_is_parent = device_property_read_bool(dev,
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -955,6 +955,7 @@ struct dwc3_scratchpad_array {
  * @nr_scratch: number of scratch buffers
  * @u1u2: only used on revisions <1.83a for workaround
  * @maximum_speed: maximum speed requested (mainly for testing purposes)
+ * @otg_caps: the OTG capabilities from hardware point
  * @revision: revision register contents
  * @version_type: VERSIONTYPE register contents, a sub release of a revision
  * @dr_mode: requested mode of operation
@@ -1111,6 +1112,7 @@ struct dwc3 {
 	u32			nr_scratch;
 	u32			u1u2;
 	u32			maximum_speed;
+	struct usb_otg_caps	otg_caps;
 
 	/*
 	 * All 3.1 IP version constants are greater than the 3.0 IP
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -3574,6 +3574,10 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	dwc->gadget.sg_supported	= true;
 	dwc->gadget.name		= "dwc3-gadget";
 	dwc->gadget.lpm_capable		= true;
+	dwc->gadget.is_otg		= (dwc->dr_mode == USB_DR_MODE_OTG) &&
+					  (dwc->otg_caps.hnp_support ||
+					   dwc->otg_caps.srp_support ||
+					   dwc->otg_caps.adp_support);
 
 	/*
 	 * FIXME We might be setting max_speed to <SUPER, however versions