Jack Pham <jackp@xxxxxxxxxxxxxx> writes:
> On DWC_usb3 revisions 3.00a and newer (including DWC_usb31 and
> DWC_usb32) the GUCTL1 register gained the DEV_DECOUPLE_L1L2_EVT
> field (bit 31) which when enabled allows the controller in device
> mode to treat USB 2.0 L1 LPM & L2 events separately.
>
> After commit d1d90dd27254 ("usb: dwc3: gadget: Enable suspend
> events") the controller will now receive events (and therefore
> interrupts) for every state change when entering/exiting either
> L1 or L2 states. Since L1 is handled entirely by the hardware
> and requires no software intervention, there is no need to even
> enable these events and unnecessarily notify the gadget driver.
> Enable the aforementioned bit to help reduce the overall interrupt
> count for these L1 events that don't need to be handled while
> retaining the events for full L2 suspend/wakeup.
>
> Signed-off-by: Jack Pham <jackp@xxxxxxxxxxxxxx>
Looks okay to me:
Acked-by: Felipe Balbi <balbi@xxxxxxxxxx>
--
balbi
