Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757422AbbKFPlK (ORCPT ); Fri, 6 Nov 2015 10:41:10 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:44942 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1757378AbbKFPlI (ORCPT ); Fri, 6 Nov 2015 10:41:08 -0500 Date: Fri, 6 Nov 2015 10:41:07 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Georgi Djakov cc: Andy Gross , , Greg KH , Peter Chen , , Subject: Re: [PATCH 2/2] usb: host: ehci-msm: Use posted data writes on AHB In-Reply-To: <563C7D2C.9080909@linaro.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1388 Lines: 39 On Fri, 6 Nov 2015, Georgi Djakov wrote: > On 11/06/2015 08:04 AM, Andy Gross wrote: > > This patch sets the AHBMODE to allow for posted data writes. This > > results in higher performance. > > > > Signed-off-by: Andy Gross > > With these patches I see significant improvement in throughput > on my db410c board. > > Tested-by: Georgi Djakov > > > --- > > drivers/usb/host/ehci-msm.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c > > index c4f84c8..c23e285 100644 > > --- a/drivers/usb/host/ehci-msm.c > > +++ b/drivers/usb/host/ehci-msm.c > > @@ -57,8 +57,8 @@ static int ehci_msm_reset(struct usb_hcd *hcd) > > > > /* bursts of unspecified length. */ > > writel(0, USB_AHBBURST); > > - /* Use the AHB transactor */ > > - writel(0, USB_AHBMODE); > > + /* Use the AHB transactor, allow posted data writes */ > > + writel(0x8, USB_AHBMODE); > > /* Disable streaming mode and select host mode */ > > writel(0x13, USB_USBMODE); Acked-by: Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/