On Wed, May 10, 2017 at 03:32:19PM +0200, Lucas Stach wrote: > Am Mittwoch, den 10.05.2017, 10:27 -0300 schrieb Fabio Estevam: > > On Wed, May 10, 2017 at 10:17 AM, Peter Senna Tschudin > > <peter.senna@xxxxxxxxxxxxx> wrote: > > > On Tue, May 09, 2017 at 07:21:24AM -0300, Fabio Estevam wrote: > > >> Hi Peter, > > >> > > >> On Tue, May 9, 2017 at 3:34 AM, Peter Senna Tschudin > > >> <peter.senna@xxxxxxxxxxxxx> wrote: > > >> > > >> > Something that ocurred to me is that u-boot is initializing the PCI, and > > >> > the PCI networkd cards. Ideally this should not affect anything, but > > >> > can this be related to the issue? > > >> > > >> Yes, in order to narrow things down: please boot 4.11 without PCI > > >> support in U-Boot. > > > > > > Yes, removing the PCI code from u-boot makes 4.11 to boot. But latest > > > next still hangs. > > > > Ok, good. At least we see the same behaviour now. > > > > We still need a fix for the mx6q hang on systems with PCI switch for > > linux/next or 4.12-rc1. > > I will take a look at this today. I'll be more than happy to help. Let me know if you need testing or any other thing. > > > > > >> The problem is that mx6q does not have a way to properly reset the PCI block. > > >> > > >> On the board I tested there is no PCI support in U-Boot. > > >> > > >> Maybe we need the following approach in U-Boot as Lucas did for Barebox: > > >> https://git.pengutronix.de/cgit/barebox/commit/?id=f1da98da2760c21487bbba8f7fb957c843a22896 > > > > > > Maybe we do need, but the kernel is working on v4.10 for our use case, > > > and it is not working any longer on v4.11. What is the way to continue > > > from here? > > > > There is no other way other than fixing U-Boot on this case. > > You could also revert the change in the kernel if you are absolutely > sure that this won't cause issues on your system (you are not using the > internal watchdog etc.). > > But for the long run and to make sure that _all_ use-cases work > properly, there is no way around fixing your bootloader to behave > correctly. Thanks! > > Regards, > Lucas >
