Hi, (no top-posting)
"Araujo, Billy" <billy.ara...@flukecal.com> writes: > Hi Felipe, > > I think the issue is very similar to the one indicated by Johan Hovold: > > https://lkml.kernel.org/r/20171030170802.14489-1-diand...@chromium.org > > Eventually we would like to test this patch on our system and check if it > works for us. > > > Regards, > > Billy. > > > -----Original Message----- > From: Felipe Balbi [mailto:felipe.ba...@linux.intel.com] > Sent: 27 November 2017 11:50 > To: Billy Araujo <billyara...@gmail.com>; Minas Harutyunyan > <minas.harutyun...@synopsys.com> > Cc: linux-usb@vger.kernel.org; Araujo, Billy <billy.ara...@flukecal.com> > Subject: Re: dwc2/dwc_otg drivers > > > Hi, > > Billy Araujo <billyara...@gmail.com> writes: >> Hi Felipe and Minas, >> >> >> Firstly, thank you very much for your responses. >> >> I work as a software engineer at Fluke. >> We compile our own version of the kernel but I am not the Linux kernel >> maintainer at Fluke, I work mostly on the application side using Qt >> and >> C++. >> >> I am still learning about the Linux kernel so sorry if this is a dumb >> question but can these SOF interrupts be disabled in the kernel/controller? > > possibly, but it may be that SOF interrupts are needed for whatever Erratum > implementation. Check the sources. > >> We are using Linux based on Angstrom (v2016.06), built using Yocto >> recipes (I think) and using a USB analyser I see that are millions of >> NAKs even on a relatively short capture.The problem is that when we >> initialise a 3rd party kernel module/library the system slows down >> significantly. I think they tested it on Raspberry PI and it worked >> fine. So not sure where the problem is. But now I know where to look. > > I'd ask for support from the vendor giving you the kernel and the other > vendor giving you the 3rd party driver that slows down the system. Keep in > mind you're already paying both suppliers for support, might as well use it. > > good luck > > -- > balbi > ________________________________ > ________________________________ > > > Please be advised that this email may contain confidential information. If > you are not the intended recipient, please notify us by email by replying to > the sender and delete this message. The sender disclaims that the content of > this email constitutes an offer to enter into, or the acceptance of, any > agreement; provided that the foregoing does not invalidate the binding effect > of any digital or other electronic reproduction of a manual signature that is > included in any attachment. message deleted! -- balbi
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