[PATCH] Revert "ARM: bcm283x: Switch V3D over to using the PM driver instead of firmware."

Florian Fainelli f.fainelli at gmail.com
Fri Sep 20 17:52:18 UTC 2019

On 9/8/19 8:44 AM, Stefan Wahren wrote:
> Since release of the new BCM2835 PM driver there has been several reports
> of V3D probing issues. This is caused by timeouts during powering-up the
> GRAFX PM domain:
>   bcm2835-power: Timeout waiting for grafx power OK
> I was able to reproduce this reliable on my Raspberry Pi 3B+ after setting
> force_turbo=1 in the firmware configuration. Since there are no issues
> using the firmware PM driver with the same setup, there must be an issue
> in the BCM2835 PM driver.
> Unfortunately there hasn't been much progress in identifying the root cause
> since June (mostly in the lack of documentation), so i decided to switch
> back until the issue in the BCM2835 PM driver is fixed.
> Link: https://github.com/raspberrypi/linux/issues/3046
> Fixes: e1dc2b2e1bef (" ARM: bcm283x: Switch V3D over to using the PM driver instead of firmware.")
> Cc: stable at vger.kernel.org
> Signed-off-by: Stefan Wahren <wahrenst at gmx.net>

Do you want me to pick up this change directly, or would you want to
issue a pull request for 5.4-rcX with other fixes?

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