Re: ARM.STM32 - Mainline stable kernel 5.9.10 hangs indefinitely on a STM32MP157A-DK1 board.

[Manuel Reis]

Thank you very much Alex,

Tried, tested and verified. Got it working with stable/master 
(v5.10-rc5).

Regards,
Manuel

On ter, 24 nov, 2020 at 14:11, Alexandre Torgue 
<alexandre.torgue@xxxxxx> wrote:
> Hi Manuel
>
> On 11/24/20 1:50 PM, Manuel Reis wrote:
> > To:     Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
> > To:     Alexandre Torgue <alexandre.torgue@xxxxxx>
> > Cc:    linux-kernel@xxxxxxxxxxxxxxx
> > CC:    Michael Opdenacker <michael.opdenacker@xxxxxxxxxxx>
> >
> > Hi there,
> >
> > Mainline stable kernel 5.9.10 hangs indefinitely on a 
> > STM32MP157A-DK1 Discovery Kit board.
> >
> > Built plain vanilla 5.9.10 stable kernel for multi_v7_defconfig (set 
> > compression to XZ) using arm-linux-gnueabi-gcc (Ubuntu 
> > 10.2.0-8ubuntu1) 10.2.0.
> >
> > Downloaded it to the board memory via tftp running U-Boot v2020.07. 
> > After boot, kernel initiates and prints several messages until it 
> > hangs on:
> >
> > [ 2.692879] stpmic1 1-0033: PMIC Chip Version: 0x10
> > [ 2.704158] vddcore: supplied by regulator-dummy
> > [ 2.710304] vdd_ddr: supplied by regulator-dummy
> > [ 2.716414] vdd: supplied by regulator-dummy
> > [ 2.722355] v3v3: supplied by regulator-dummy
> > [ 2.728033] v1v8_audio: supplied by v3v3
> > [ 2.734287] v3v3_hdmi: supplied by regulator-dummy
> > [ 2.741035] vtt_ddr: supplied by vdd_ddr
> > [ 2.743833] vdd_usb: supplied by regulator-dummy
> > [ 2.751332] vdda: supplied by regulator-dummy
> > [ 2.757371] v1v2_hdmi: supplied by v3v3
> >
> > No other information or indication is given, even though I added 
> > kernel debugging features such as the ones in "Kernel hacking 
> > ->Debug Oops, Lockups and Hangs".
> >
> > Any help would be appreciated. Let me know if I can provide any 
> > further information.
>
> It has been introduced by commit aea6cb99703e ("regulator: resolve 
> supply after creating regulator") and should fixed by this one:
>
> cf1ad559a20d ("regulator: defer probe when trying to get voltage from 
> unresolved supply").
>
> Should be taken in stable tree.
>
> regards
> alex
>
>
> > Cheers,
> > Manuel