[PATCH] [RFC] usb: dwc2: Run the core connect in dwc2_hcd_init()

[Marek Vasut <marex@denx.de>]

On STM32MP1 without the STUSB1600 USB-C chip (i.e. with plain USB-OTG
micro-B plug with ID and VBUS detection), the USB OTG port only works
if a micro-B device (e.g. a USB stick) is plugged in first. Once this
is done, both micro-B device and host (e.g. a PC via a USB A-to-microB
cable) are correctly detected and recognized. If a USB host is plugged
in first (e.g. a PC), then the PC does not detect the STM32MP1 at all.

By running the core connect code in dwc2_hcd_init(), both device and
host are detected and the USB works as expected. However, it is not
clear whether this is the correct solution.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Minas Harutyunyan <hminas@synopsys.com>
To: linux-usb@vger.kernel.org
---
 drivers/usb/dwc2/hcd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index b90f858af960..ead605efeb24 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5237,6 +5237,11 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
 
 	dwc2_enable_global_interrupts(hsotg);
 
+	dwc2_hsotg_core_init_disconnected(hsotg, false);
+	/* Enable ACG feature in device mode,if supported */
+	dwc2_enable_acg(hsotg);
+	dwc2_hsotg_core_connect(hsotg);
+
 	return 0;
 
 error4:
-- 
2.25.1