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

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Date:   Tue, 24 Nov 2020 12:50:23 +0000
From:   Manuel Reis <mluis.reis@...il.com>
To:     mcoquelin.stm32@...il.com, alexandre.torgue@...com
Cc:     linux-kernel@...r.kernel.org,
        Michael Opdenacker <michael.opdenacker@...tlin.com>
Subject: ARM.STM32 - Mainline stable kernel 5.9.10 hangs indefinitely on a
 STM32MP157A-DK1 board.

To:     Maxime Coquelin <mcoquelin.stm32@...il.com>
To:     Alexandre Torgue <alexandre.torgue@...com>
Cc:	linux-kernel@...r.kernel.org
CC:	Michael Opdenacker <michael.opdenacker@...tlin.com>

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.

Cheers,
Manuel

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