Raspberry Pi 3 Model B+ hangs in vc4_hdmi_runtime_resume()

[Stefan Wahren]

Hi Maxime,

Am 27.09.22 um 09:25 schrieb Maxime Ripard:
> Hi Stefan,
>
> On Mon, Sep 26, 2022 at 08:50:12PM +0200, Stefan Wahren wrote:
>> Am 26.09.22 um 14:47 schrieb Maxime Ripard:
>>> On Mon, Sep 26, 2022 at 02:40:48PM +0200, Marc Kleine-Budde wrote:
>>>> On 26.09.2022 14:08:04, Stefan Wahren wrote:
>>>>> Hi Marc,
>>>>>
>>>>> Am 26.09.22 um 12:21 schrieb Marc Kleine-Budde:
>>>>>> On 22.09.2022 17:06:00, Maxime Ripard wrote:
>>>>>>>> I'm on a Raspberry Pi 3 Model B+ running current Debian testing ARM64,
>>>>>>>> using Debian's v5.19 kernel (Debian's v5.18 was working flawless).
>>>>>>>>
>>>>>>>> | [    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034]
>>>>>>>> | [    0.000000] Linux version 5.19.0-1-arm64 (debian-kernel at lists.debian.org) (gcc-11 (Debian 11.3.0-5) 11.3.0, GNU ld (GNU Binutils for Debian) 2.38.90.20220713) #1 SMP Debian 5.19.6-1 (2022-0
>>>>>>>> 9-01)
>>>>>>>> | [    0.000000] Machine model: Raspberry Pi 3 Model B+
>>>>>>>> | [    3.747500] raspberrypi-firmware soc:firmware: Attached to firmware from 2022-03-24T13:21:11
>>>>>>>>
>>>>>>>> As soon a the vc4 module is loaded the following warnings hits 4
>>>>>>>> times, then the machine stops.
>>>>>> [...]
>>>>>>
>>>>>>> The warning itself is fixed, both upstream and in stable (5.19.7).
>>>>>> Ok. Debian is using 5.19.6
>>>>>>
>>>>>>> It shouldn't have any relation to the hang though. Can you share your
>>>>>>> setup?
>>>>>> - config.txt:
>>>>>>
>>>>>> -------->8-------->8-------->8-------->8--------
>>>>>> gpu_mem=16
>>>>>> disable_splash=1
>>>>>>
>>>>>> arm_64bit=1
>>>>>> enable_uart=1
>>>>>> uart_2ndstage=1
>>>>>>
>>>>>> os_prefix=/u-boot/
>>>>>>
>>>>>> [pi3]
>>>>>> force_turbo=1
>>>>>> -------->8-------->8-------->8-------->8--------
>>>>>>
>>>>>> - Raspberry Pi 3 Model B+
>>>>>> - no HDMI connected
>>>>> Does it mean, the issue only occurs without HDMI connected?
>>>>> If you didn't test with HDMI yet, could you please do?
>>>> The error occurs with HDMI not connected, as vc4 is the gfx driver I
>>>> thought this might be of interest. :)
>>>>
>>>> I don't have a HDMI monitor here, but I'll come back to you as soon as I
>>>> get access to one (might take some time).
>>> It's not the first time an issue like this one would occur. I'm trying
>>> to make my Pi3 boot again, and will try to bisect the issue.
>> yes the issue is only triggered without HDMI connected. I was able to
>> reproduce with an older vc4 firmware from 2020 (don't want to upgrade yet).
>> Kernel was also an arm64 build with defconfig.
>>
>> Here some rough starting point for bisection:
>>
>> 5.18.0 good
>> 5.19.0 bad
>> 5.19.6 bad
> Sorry it took a bit of time, it looks like I found another bug while
> trying to test this yesterday.
>
> Your datapoints are interesting though. I have a custom configuration
> and it does boot 5.19 without an HDMI connected.
i will try to bisect this, too.
>
> So I guess it leaves us with either the firmware version being different
> (I'm using a newer version, from March 2022), or the configuration. I'll
> test with defconfig.
>
> Maxime