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@vger.kernel.org Signed-off-by: Stefan Wahren wahrenst@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?