Hi,

On 03.07.19 17:11, Peter Robinson wrote:
> On Wed, Jul 3, 2019 at 3:14 PM Stefan Wahren <stefan.wah...@i2se.com> wrote:
>> Hi Peter,
>>
>> On 03.07.19 14:10, Peter Robinson wrote:
>>> Hi Stefan,
>>>
>>>>> loads but I don't get an error, just:
>>>>> bcm2835-power bcm2835-power: Broadcom BCM2835 power domains driver
>>>>>
>>>>> That's a minimal text only image, display attached but just at a linux
>>>>> console login.
>>>> Could you please so kind and make an ASCII table for the bad cases with
>>>> the following columns Raspberry Pi type, kernel, DTB, firmware and add
>>>> them to the github issue?
>>> Sorry, I've not had time to do all that testing across the matrix of
>>> devices, it will take some time and I have around 10 days of travel
>>> starting on Thursday.
>>>
>>> The first test I did do was one of my regular desktop testing devices
>>> which has consistently had the issue I did some testing. It's an
>>> original RPi 3B with Fedora 30 Workstation (GNOME).
>>>
>>> v5.2-rc7 - fails with the following errors, interesting no messages
>>> about vc4 driver at all.
>>>
>>> [    6.791023] bcm2835-power bcm2835-power: Broadcom BCM2835 power
>>> domains driver
>>> [   32.891912] bcm2835-power bcm2835-power: Timeout waiting for grafx power 
>>> OK
>>> [   32.937340] bcm2835-power bcm2835-power: Timeout waiting for grafx power 
>>> OK
>> could you please provide the RPi firmware version from dmesg?
> "2019-03-27 15:48" (git commit 9fd387c)
>
>>> I then did a build, same kernel as above but with the bcm2835-power
>>> driver disabled:
>>> # CONFIG_BCM2835_POWER is not set
>>>
>>> No mention of bcm2835-power (as expected), and just this error from vc4:
>>> [   30.873633] vc4_v3d 3fc00000.v3d: ignoring dependency for device,
>>> assuming no driver
>>>
>>> Then with the same kernel as the last test (v5.2-rc7 bcm2835-power
>>> disabled) plus the following two DT patches reverted:
>>>
>>> e1dc2b2e1bef7237fd8fc055fe1ec2a6ff001f91 ARM: bcm283x: Switch V3D over
>>> to using the PM driver instead of firmware.
>>> 81fc035f07d230c0f687ef09d5ecf2c885dba8ae ARM: bcm283x: Extend the WDT
>>> DT node out to cover the whole PM block. (v4)
>> Yes, reverting those patches is the last option. But i only want go this
>> way, in case the new bcm2835 is really broken. Btw the RPi 4 relies on
>> this driver.
> I'm considering reverting them for our stable releases (so 5.1.x
> kernel) so users can get back to working devices, and I can stop the
> deluge of support queries, and then we can debug this on 5.2. Are you
> OK with that?
>
> If figured it would be required for RPi4, but that's a different DT
> anyway, and a little while off.

there is small progress on this issue. I was able to reproduce this
issue on my RPi 3B+. More details here [1]. So from my POV this is
definitely a driver issue.

Since Eric doesn't work for Broadcom anymore and the Raspberry Pi
Trading isn't able to provide more information about this, i plan to revert

e1dc2b2e1bef7237fd8fc055fe1ec2a6ff001f91 ARM: bcm283x: Switch V3D over
to using the PM driver instead of firmware.

with the release of Linux 5.4-rc1.

Best regards
Stefan

[1] - https://github.com/raspberrypi/linux/issues/3046
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