From: Amelie Delaunay <amelie.delaunay@foss.st.com>

commit fac6bf87c55f7f0733efb0375565fb6a50cf2caf upstream.

When activate_stm_id_vb_detection is enabled, ID and Vbus detection relies
on sensing comparators. This detection needs time to stabilize.
A delay was already applied in dwc2_resume() when reactivating the
detection, but it wasn't done in dwc2_probe().
This patch adds delay after enabling STM ID/VBUS detection. Then, ID state
is good when initializing gadget and host, and avoid to get a wrong
Connector ID Status Change interrupt.

Fixes: a415083a11cc ("usb: dwc2: add support for STM32MP15 SoCs USB OTG HS and FS")
Cc: stable <redacted>
Acked-by: Minas Harutyunyan <redacted>
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20211207124510.268841-1-amelie.delaunay@foss.st.com (local)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc2/platform.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c

@@ -575,6 +575,9 @@ static int dwc2_driver_probe(struct plat
 		ggpio |= GGPIO_STM32_OTG_GCCFG_IDEN;
 		ggpio |= GGPIO_STM32_OTG_GCCFG_VBDEN;
 		dwc2_writel(hsotg, ggpio, GGPIO);
+
+		/* ID/VBUS detection startup time */
+		usleep_range(5000, 7000);
 	}
 
 	retval = dwc2_drd_init(hsotg);