Commit 1c440308 authored Aug 26, 2019 by Elson Roy Serrao

usb: xhci: Reduce the BESL value to improve L1 residency



BESL value decides the L1 LPM resume latency and hence
controls the L1 suspend residency. Lower BESL values have
significant improvement in L1 residency for 1ms SI which
results in more power savings. Set this value to 0 to
achieve this saving.

Change-Id: If3df0424c273ed68b7e070c922f5757381114ca4
Signed-off-by: Elson Roy Serrao <eserrao@codeaurora.org>

parent dabca6e5

drivers/usb/host/xhci.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -450,7 +450,7 @@ struct xhci_op_regs {
		* e.g. not program values > '4' if BLC = '1' and a HIRD device is attached,
		* or not program values < '4' if BLC = '0' and a BESL device is attached.
		*/
		#define XHCI_DEFAULT_BESL 4
		#define XHCI_DEFAULT_BESL 0

		/*
		* USB3 specification define a 360ms tPollingLFPSTiemout for USB3 ports