Date: Sun, 19 Jul 2015 11:27:53 -0600 From: Ian Lepore <ian@freebsd.org> To: Hans Petter Selasky <hps@selasky.org> Cc: Glen Barber <gjb@FreeBSD.org>, Andreas Schwarz <freebsd.asc@strcmp.org>, freebsd-arm@freebsd.org Subject: Re: SDHC errors during boot on RPi2 (11.0-CURRENT) Message-ID: <1437326873.1334.390.camel@freebsd.org> In-Reply-To: <55AAC22D.6020609@selasky.org> References: <55A5A3F4.7040105@foxvalley.net> <D7A88FAC-C4C0-46DB-91F6-9AF51CD142B7@bsdimp.com> <20150716142329.4387b29de5d7fc9a2a9c27ab@strcmp.org> <CAB=2f8yMjZ4U3cNyCVt%2BemJQ7A5vGniuGevq0bQe36tw-RoR_Q@mail.gmail.com> <1437072916.1334.364.camel@freebsd.org> <08A8C4D5-54A5-432B-B3D7-744287B76EF9@bsdimp.com> <1437144948.1334.373.camel@freebsd.org> <20150718030157.2aa9a78a874d3657131a2bed@strcmp.org> <20150718010351.GI1438@FreeBSD.org> <55AAC22D.6020609@selasky.org>
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On Sat, 2015-07-18 at 23:16 +0200, Hans Petter Selasky wrote: > On 07/18/15 03:03, Glen Barber wrote: > > On Sat, Jul 18, 2015 at 03:01:57AM +0200, Andreas Schwarz wrote: > >> On Fri, 17 Jul 2015 08:55:48 -0600 > >> Ian Lepore <ian@freebsd.org> wrote: > >> > >>> On Thu, 2015-07-16 at 21:57 -0600, Warner Losh wrote: > >>>>> On Jul 16, 2015, at 12:55 PM, Ian Lepore <ian@FreeBSD.org> wrote: > >>>>> > >>>>> On Thu, 2015-07-16 at 15:17 -0300, Luiz Otavio O Souza wrote: > >>>>>> On 16 July 2015 at 09:23, Andreas Schwarz wrote: > >>>>>>> On Wed, 15 Jul 2015 21:17:21 -0600 > >>>>>>> Warner Losh wrote: > >>>>>>> > >>>>>>>>> On Jul 14, 2015, at 6:06 PM, Dan Raymond wrote: > >>>>>>>>> > >>>>>>>>> Is anyone else getting these errors during every boot? I'm running r285346. > >>>>>>>> > >>>>>>>> I˙ve been running on the RPi2 for some time and have never seen this. I haven˙t > >>>>>>>> rebuild in the past few weeks though. > >>>>>>>> > >>>>>>>> Does this happen on either SD cards? Or other versions of the kernel? > >>>>>>> > >>>>>>> I've the same output (using generic RPI2 kernel conf). > >>>>>> > >>>>>> This is a side effect of r283128, if you comment that line that > >>>>>> re-select the card, CMD7 won't fail. > >>>>>> > >>>>>> This also affects the MMC controller on Allwinner SoCs. > >>>>> > >>>>> Hmm, so some cards deselect themselves when they shouldn't, and our > >>>>> workaround that reselects them fails if the card didn't deselect itself. > >>>>> Maybe it will work for all cards/controllers if we explicitly deselect > >>>>> then reselect the card at that point. (This only happens once at > >>>>> card-insert/boot time, so it shouldn't impact performance.) > >>>>> > >>>>> The attached patch adds the explicit deselect; it may or may not help. > >>>>> (I haven't tested this at all). > >>>>> > >>>>> -- Ian > >>>>> > >>>>> Index: mmc.c > >>>>> =================================================================== > >>>>> --- mmc.c (revision 285419) > >>>>> +++ mmc.c (working copy) > >>>>> @@ -1392,6 +1392,7 @@ mmc_discover_cards(struct mmc_softc *sc) > >>>>> * out. Others seem to handle it correctly, so it may > >>>>> * be a combination of card and controller. > >>>>> */ > >>>>> + mmc_select_card(sc, 0); > >>>>> mmc_select_card(sc, ivar->rca); > >>>>> mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status); > >>>>> mmc_app_decode_sd_status(ivar->raw_sd_status, > >>>> > >>>> Yes. I like this. Update the comment though please. > >>>> > >>>> Warner > >>>> > >>> > >>> Yeah, when I commit I'll make the comment match the new reality, just > >>> waiting to hear another success report or two first. > >> > >> I can confirm that the problem is gone (after applying your patch to r285661). > >> > >> root@pizelot:~ # uname -a > >> FreeBSD pizelot.schwarzes.net 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r285661M: Sat Jul 18 02:19:21 CEST 2015 root@pizelot.schwarzes.net:/usr/obj/usr/src/sys/RPI2 arm > >> > > > > Ian, will you please commit the fix, with the plan to have this in the > > next 10.2 build? > > > > Does this fix also update u-boot? No. Any problem happening in u-boot is something completely separate from this. -- Ian
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