Hi Kai-Heng, >> On Jul 30, 2020, at 07:17, Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx> wrote: >> >> This reverts commit 7ecacafc240638148567742cca41aa7144b4fe1e. >> >> Testing this change on a board with RTL8822CE, I found that enabling >> autosuspend has no effect on the stability of the system. The board >> continued working after autosuspend, suspend and reboot. > > The original issue was found on 8723DE. Do you have one to test with? > The rtw88 codebase has changed a lot and maybe it's already fixed in mainline. > Let me do some test and I'll report back. > >> >> The original commit makes it impossible to enable autosuspend on working >> systems so it should be reverted. Disabling autosuspend should be done >> via module param or udev in userspace instead. >> >> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx> >> --- >> We have a few Chromebooks using the RTL 8822CE part over USB and they >> are running without problems with autosuspend enabled. While bringing up >> a new board, I found some power regressions that I was able to narrow >> down to this change so I'm requesting a revert. >> >> I tested this on Hp Chromebook 14a (running 4.14 kernel and 5.4 kernel) >> with this revert: >> * Enabled autosuspend, used it normally with a HID device >> * Suspended the Chromebook and verified it worked normally on resume >> * Rebooted the Chromebook and verified Bluetooth was working on next >> boot >> >> I didn't see the issue that was originally reported with this fix. For >> the original reporter, if you're still seeing this issue, there are >> other ways to disable autosuspend for your device: >> * set module param: enable_autosuspend=0 >> * change your kconfig so BT_HCIBTUSB_AUTOSUSPEND=n >> * use a udev rule to disable autosuspend for specific vid:pid >> >> Keeping this change in the kernel makes it impossible to enable >> autosuspend so it should be reverted. > > It's apparently a driver/firmware/hardware issue, so the fix should keep inside the kernel. > However, the fix can be more precise and target only 8723DE. lets do that and lets do it quickly since the merge window is close. Otherwise I really have to revert that patch. Regards Marcel
