[fedora-arm] Re: Jetson TK1 and kernel 4.8

[Timothy Krantz]

> -----Original Message-----
> From: Peter Robinson [mailto:[e-mail]]
> Sent: Monday, October 31, 2016 1:06 PM
> To: Timothy Krantz 
> Cc: [e-mail]
> Subject: Re: [fedora-arm] Re: Jetson TK1 and kernel 4.8
> > > > > > > >> > > > > Mine has as of yet failed to boot on any of them.
> > > > > > > >> > > >
> > > > > > > >> > > > Mine is currently running 4.8.1-1.fc25 without issues,
> > > > > > > >> > > > just upgrading it to the latest now to test that too.
> > > > > > > >> > >
> > > > > > > >> > > Was running 4.8.2-300.fc25.armv7hl+lpae, upgraded to
> > > > > > > >> > > 4.8.4-301.fc25 without any issues. Could you post output
> > > > > > > >> > > of your
> > > > > > > failure?
> > > > > > > >> > >
> > > > > > > >> > > Paul
> > > > > > > >>
> > > > > > > >> You might have better luck with a more recent version of U-Boot.
> > > > > > > >> I'm running U-Boot 2016.11-rc2 with 4.8.4-301.fc25 on sata.
> > > > > > > >>
> > > > > > > >>
> > > > > > > >
> > > > > > > > That made sense to me so I upgraded to the uboot that you are
> > > > > > > > using but
> > > > > > > same problem.
> > > > > > >
> > > > > > > Do you have any extra peripherals added like a mPCIe card,
> > > > > > > camera or other such things or is it just the base board? What
> > > > > > > device do you have the rootfs on? eMMC, SD or SATA?
> > > > > > >
> > > > > > > I have mine running as a bare device with the OS on the eMMC, I
> > > > > > > think Paul might have the OS on a sata SSD. Just trying to work
> > > > > > > out what if any differences there are here as there's not much
> > > > > > > that can
> > >
> > > be different.
> > > > > > >
> > > > > >
> > > > > > Thanks Peter!
> > > > > >
> > > > > > Mine is yet another variation.  It is a bare board with the boot
> > > > > > partition on an
> > > > >
> > > > > SD card and the root filesystem on an SSD.  I left the original
> > > > > eMMC untouched until I upgraded the uBoot.
> > > > >
> > > > > The u-boot is on SPI nand not the eMMC so I suspect then you
> > > > > didn't even touch it.
> > > > > > The only thing other than the SDcard and the SSD is the serial console.
> > > > > >
> > > > > > Just for kicks I tried an LPAE kernel and the first time I
> > > > > > booted it got some
> > > > >
> > > > > kenel oops that I had not seen before but I was not logging the
> > > > > console output so I turned on capture and tried again but have not
> > > > > seen that kernel oops since.
> > > > > > For some reason my board is not seeing the sata controller (or
> > > > > > not getting it
> > > > >
> > > > > initialized properly) on 4.7 and 4.8 kernels but does on 4.6.7.
> > > > >
> > > > > Is it pulled into the initrd? Do you see the driver with a
> > > > > "lsinitrd | grep
> > >
> > > ahci"
> > > > > > Tim Krantz
> > > >
> > > > Well when booting fails with 4.8.4-lape it finally drops into a
> > > > Dracut command prompt with no lsinitrd
> > >
> > > No, do it when booted against a 4.6.x kernel, you can specify the
> > > actual initrd on the cmd line....
> > > > But all I see in to console logs is about a half dozen of :
> > > >
> > > > tegra-ahci 70027000.sata: couldn't get PHY in node sata: -517
> > >
> > > Looks like it's not getting either appropriate power to the
> > > controller or some module deps are failing to be pulled into the initrd
>
> correctly.
> > > > and that is the only reference to ahci
> > > >
> > > > In a good boot on 4.6.7 I do see the driver loaded with lsinitrd | grep
>
> ahci.
> > > >
> >
> > I apologize for my ignorance.  I think what you are asking is if I run the 4.6.7
>
> kernel with the 4.8.x initrd what do I see related to ahci.
>
> No, investigating the 4.8.x initrd while booted with a 4.6 kernel (IE booted
> fully). See previous commands.
> > I tried that and get the same issue of not seeing sata and eventually
>
> dropping into a Dracut command prompt.
> > Ihave been looking into how I can examine the uInitrd and saw something
>
> about stripping off the first 64 bytes, gunzipping it and mouting it as a loop
> device but have as yet been unable to get that work.
> >

I see 
-rw-r--r--   1 root     root         9631 Aug 25 12:07 usr/lib/modules/4.8.3-300.fc25.armv7hl/kernel/drivers/ata/ahci_tegra.ko

Tim