Hi Alex
Thanks for your time and feedback! On 1/28/2020 3:22 PM, Alex Deucher wrote:
[CAUTION: External Email] On Mon, Jan 27, 2020 at 8:30 PM Rajneesh Bhardwaj <rajneesh.bhard...@amd.com> wrote:When BACO is enabled by default, sometimes it can cause additional trouble to debug KFD issues. This debugfs override allows to temporarily disable BACO for debug purpose without having to reboot the machine. However, in some cases one suspend-resume cycle might be needed if the device is already runtime suspended. e.g sudo rtcwake -m < mem or freeze > -s 15 or by triggering autosuspend event from user space, by doing something like: echo 6000 > /sys/bus/pci/devices/0000\:03\:00.0/power/autosuspend_delay_ms Usage: echo 0 > /sys/kernel/debug/kfd/enable_baco and run cat /sys/kernel/debug/kfd/baco_status to verify whether BACO is enabled or disabled by kfd driver. It should be noted that while enabling baco again via kfd override, we must do the following steps: 1. echo 0 > /sys/kernel/debug/kfd/enable_baco 2. sudo rtcwake -m < mem > -s 15 In this case, we need GPU to be fully reset which is done by BIOS. This is not possible in case of S2idle i.e. freeze so we must use mem for sleep.I think we can drop this patch in favor of just using the standard runtime pm control. E.g., /sys/class/drm/card0/device/power/control
Sure, i was using the /sys/bus/pci way to do it and found it was not easy. Since this sysfs exists, will drop the patch.
Regards Rajneesh
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