From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Chen <hzpeterchen@gmail.com>
Subject: Re: [PATCH v12 6/9] usb: xhci: use bus->sysdev for DMA configuration
Date: Thu, 9 Feb 2017 09:45:07 +0800
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To: Vivek Gautam <vivek.gautam@codeaurora.org>
Cc: Mark Rutland <mark.rutland@arm.com>, Peter Chen <peter.chen@nxp.com>, Ulf Hansson <ulf.hansson@linaro.org>, Heiko =?iso-8859-1?Q?St=FCbner?= <heiko@sntech.de>, Stephen Boyd <stephen.boyd@linaro.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, gary.bisson@boundarydevices.com, Sriram Dash <sriram.dash@nxp.com>, festevam@gmail.com, stillcompiling@gmail.com, Arnd Bergmann <arnd@arndb.de>, dbaryshkov@gmail.com, vaibhav.hiremath@linaro.org, krzk@kernel.org, mka@chromium.org, Alan Stern <stern@rowland.harvard.edu>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, mail@maciej.szmigiero.name, Pawel Moll <pawel.moll@arm.com>, linux-pm@vger.kernel.org, s.hauer@pengutronix.de, troy.kisky@boundarydevices.com, robh+dt <robh+dt@kernel.org>, Mathias Nyman <mathias.nyman@linux.intel.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infrad>
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On Wed, Feb 08, 2017 at 05:27:31PM +0530, Vivek Gautam wrote:
> Hi,
> 
> 
> On Mon, Feb 6, 2017 at 2:43 PM, Peter Chen <peter.chen@nxp.com> wrote:
> > From: Arnd Bergmann <arnd@arndb.de>
> >
> > For xhci-hcd platform device, all the DMA parameters are not
> > configured properly, notably dma ops for dwc3 devices. So, set
> > the dma for xhci from sysdev. sysdev is pointing to device that
> > is known to the system firmware or hardware.
> >
> > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> > Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
> > Tested-by: Baolin Wang <baolin.wang@linaro.org>
> > Tested-by: Vivek Gautam <vivek.gautam@codeaurora.org>
> > Tested-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
> > Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> > ---
> 
> This patch doesn't work for me anymore on db820c target [1].
> While the same kernel with reverts of patches [2] [3] and an older
> patch [4] by Grygorii Strashko works [5].
> 
> [1] https://github.com/vivekgautam1/linux/tree/linux-v4.10-rc7-usb-db820c-nonworking
> [2] 8c9f2de459c7 usb: dwc3: Do not set dma coherent mask
> [3] d64ff406e51e usb: dwc3: use bus->sysdev for DMA configuration
> [4] https://lkml.org/lkml/2016/4/25/813
> [5] https://github.com/vivekgautam1/linux/tree/linux-v4.10-rc7-usb-db820c
> 
> 

The [2] and [3] have already at mainline, you may talk with Felipe about
it.

-- 

Best Regards,
Peter Chen