Hi,
Op 10-10-2022 om 23:35 schreef Andrey Smirnov:
On Mon, Oct 10, 2022 at 1:52 PM Ferry Toth <fntoth@xxxxxxxxx> wrote:
Hi
Op 10-10-2022 om 13:04 schreef Ferry Toth:
Hi
On 10-10-2022 07:02, Andrey Smirnov wrote:
On Fri, Oct 7, 2022 at 6:07 AM Ferry Toth <fntoth@xxxxxxxxx> wrote:
On 07-10-2022 04:11, Thinh Nguyen wrote:
On Thu, Oct 06, 2022, Ferry Toth wrote:
Hi
On 06-10-2022 04:12, Thinh Nguyen wrote:
On Wed, Oct 05, 2022, Ferry Toth wrote:
Hi,
Thanks!
Does the failure only happen the first time host is
initialized? Or can
it recover after switching to device then back to host mode?
I can switch back and forth and device mode works each time,
host mode remains
dead.
Ok.
Probably the failure happens if some step(s) in
dwc3_core_init() hasn't
completed.
tusb1210 is a phy driver right? The issue is probably
because we didn't
initialize the phy yet. So, I suspect placing
dwc3_get_extcon() after
initializing the phy will probably solve the dependency
problem.
You can try something for yourself or I can provide
something to test
later if you don't mind (maybe next week if it's ok).
Yes, the code move I mentioned above "moves dwc3_get_extcon()
until after
dwc3_core_init() but just before dwc3_core_init_mode(). AFAIU
initially
dwc3_get_extcon() was called from within dwc3_core_init_mode()
but only for
case USB_DR_MODE_OTG. So with this change order of events is
more or less
unchanged" solves the issue.
I saw the experiment you did from the link you provided. We want
to also
confirm exactly which step in dwc3_core_init() was needed.
Ok. I first tried the code move suggested by Andrey (didn't work).
Then
after reading the actual code I moved a bit further.
This move was on top of -rc6 without any reverts. I did not make
additional
changes to dwc3_core_init()
So current v6.0 has: dwc3_get_extcon - dwc3_get_dr_mode - ... -
dwc3_core_init - .. - dwc3_core_init_mode (not working)
I changed to: dwc3_get_dr_mode - dwc3_get_extcon - .. -
dwc3_core_init - ..
- dwc3_core_init_mode (no change)
Then to: dwc3_get_dr_mode - .. - dwc3_core_init - .. -
dwc3_get_extcon -
dwc3_core_init_mode (works)
.. are what I believe for this issue irrelevant calls to
dwc3_alloc_scratch_buffers, dwc3_check_params and dwc3_debugfs_init.
Right. Thanks for narrowing it down. There are still many steps in
dwc3_core_init(). We have some suspicion, but we still haven't
confirmed
the exact cause of the failure. We can write a proper patch once we
know
the reason.
If you would like me to test your suspicion, just tell me what to do
:-)
OK, Ferry, I think I'm going to need clarification on specifics on
your test setup. Can you share your kernel config, maybe your
"/proc/config.gz", somewhere? When you say you are running vanilla
Linux, do you mean it or do you mean vanilla tree + some patch delta?
For v6.0 I can get the exacts tonight. But earlier I had this for v5.17:
https://github.com/htot/meta-intel-edison/blob/master/meta-intel-edison-bsp/recipes-kernel/linux/linux-yocto_5.17.bb
There are 2 patches referred in #67 and #68. One is related to the
infinite loop. The other is I believe also needed to get dwc3 to work.
All the kernel config are applied as .cfg.
Patches and cfs's here:
https://github.com/htot/meta-intel-edison/tree/master/meta-intel-edison-bsp/recipes-kernel/linux/files
Updated Yocto recipe for v6.0 here:
https://github.com/htot/meta-intel-edison/blob/honister/meta-intel-edison-bsp/recipes-kernel/linux/linux-yocto_6.0.bb
#75-#77 are the 2 reverts from Andy, + one SOF revert (not related to
this thread).
Please drop all of this
https://github.com/htot/meta-intel-edison/blob/honister/meta-intel-edison-bsp/recipes-kernel/linux/linux-yocto_6.0.bb#L69-L77
and re do the testing. Assuming things are still broken, that's how
you want to do the bisecting.
I removed 4 patches:
0043b-TODO-driver-core-Break-infinite-loop-when-deferred-p.patch
0044-REVERTME-usb-dwc3-gadget-skip-endpoints-ep-18-in-out.patch
0001-Revert-USB-fixup-for-merge-issue-with-usb-dwc3-Don-t.patch
0001-Revert-usb-dwc3-Don-t-switch-OTG-peripheral-if-extco.patch
and indeed as you expect kernel boots (no infinite loop). However dwc3
host mode is not working as in your case, device mode works fine (Yocto
configures a set of gadgets for me).
Just to be sure if I could have bisected without 0043a I added back the
2 0001-Revert* and indeed I run into the infinite loop with the console
spitting out continuous:
debugfs: Directory 'dwc3.0.auto' with parent 'ulpi' already present!
tusb1210 dwc3.0.auto.ulpi: error -110 writing val 0x41 to reg 0x80
so yes it seems either 0043b or your patch "usb: dwc3: Don't switch OTG
-> peripheral if extcon is present" is needed to boot (break the
infinite loop). But your patch is in my case not sufficient to make host
mode work.
As I understand it depends a bit on the timing, I might have a different
initrd (built by Yocto vs. Buildroot). F.i. I see I have
extcon-intel-mrfld in initrd and dwc3 / phy-tusb1210 built-in.
