According to programming guide in host mode, port
power must be turned on in session request
interrupt handlers.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 21795c826a45 ("usb: dwc2: exit hibernation on session request")
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@xxxxxxxxxxxx>
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@xxxxxxxxxxxx>
---
drivers/usb/dwc2/core_intr.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 0a7f9330907f..8c0152b514be 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -307,6 +307,7 @@ static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
{
int ret;
+ u32 hprt0;
/* Clear interrupt */
dwc2_writel(hsotg, GINTSTS_SESSREQINT, GINTSTS);
@@ -328,6 +329,13 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
* established
*/
dwc2_hsotg_disconnect(hsotg);
+ } else {
+ /* Turn on the port power bit. */
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 |= HPRT0_PWR;
+ dwc2_writel(hsotg, hprt0, HPRT0);
+ /* Connect hcd after port power is set. */
+ dwc2_hcd_connect(hsotg);
}
}
--
2.25.1
