Before changing to connector B exiting from Partial
Power Down is required.
- Added exiting from Partial Power Down mode when
connector ID status changes to "connId B".
Because if connector ID status changed to B connector
while core was in partial power down mode, HANG would
accrue from a soft reset.
Signed-off-by: Artur Petrosyan <arthur.petros...@synopsys.com>
Acked-by: Minas Harutyunyan <minas.harutyun...@synopsys.com>
---
drivers/usb/dwc2/hcd.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 7c7496719152..9529e9839961 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -3206,6 +3206,15 @@ static void dwc2_conn_id_status_change(struct
work_struct *work)
if (count > 250)
dev_err(hsotg->dev,
"Connection id status change timed out\n");
+
+ /*
+ * Exit Partial Power Down without restoring registers.
+ * No need to check the return value as registers
+ * are not being restored.
+ */
+ if (hsotg->in_ppd && hsotg->lx_state == DWC2_L2)
+ dwc2_exit_partial_power_down(hsotg, 0, false);
+
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
dwc2_core_init(hsotg, false);
dwc2_enable_global_interrupts(hsotg);
--
2.25.1
