usb: dwc2: Add exit clock gating from session request interrupt

Added clock gating exit flow from session
request interrupt handler according programming guide.

Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073638.921E8A0099@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index c764407..550c52c 100644 (file)
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -316,12 +316,19 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
                hsotg->lx_state);
 
        if (dwc2_is_device_mode(hsotg)) {
-               if (hsotg->lx_state == DWC2_L2 && hsotg->in_ppd) {
-                       ret = dwc2_exit_partial_power_down(hsotg, 0,
-                                                          true);
-                       if (ret)
-                               dev_err(hsotg->dev,
-                                       "exit power_down failed\n");
+               if (hsotg->lx_state == DWC2_L2) {
+                       if (hsotg->in_ppd) {
+                               ret = dwc2_exit_partial_power_down(hsotg, 0,
+                                                                  true);
+                               if (ret)
+                                       dev_err(hsotg->dev,
+                                               "exit power_down failed\n");
+                       }
+
+                       /* Exit gadget mode clock gating. */
+                       if (hsotg->params.power_down ==
+                           DWC2_POWER_DOWN_PARAM_NONE && hsotg->bus_suspended)
+                               dwc2_gadget_exit_clock_gating(hsotg, 0);
                }
 
                /*