Re: DM3730 Suspend-Resume with 5.11-rc6

[Andreas Kemnade <andreas@kemnade.info>]

On Mon, 8 Feb 2021 11:15:48 +0200
Tony Lindgren <tony@atomide.com> wrote:

> * Adam Ford <aford173@gmail.com> [210206 22:22]:
> > On Sat, Feb 6, 2021 at 3:57 PM Adam Ford <aford173@gmail.com> wrote:  
> > >
> > > I am having issues with suspend on a DM3730 running 5.11-rc6, and it
> > > seems like core_pwrdm may be the issue.  
> 
> That probably just means you did not configure off mode for idle.
> 

hmm, do you still need to configure anything for off mode? I rather
think it might be a misbehaving peripheral, not a general off mode
problem. So maybe try it with less modules loaded and add them step by
step to find out the misbehaving one.

> Suspend and resume still works for me based on a quick try with -rc7.
> I use the following test script to enable idle FYI, then suspend,
> and wake-up the system to a key press on serial console.
> 
> Also modprobe rtc-twl and rtcwake -m mem -s 5 worked.
> 
> Regards,
> 
> Tony
> 
> 8< -------------
> #!/bin/bash
> 
> # Detach kernel serial console
> consoles=$(find /sys/bus/platform/devices/4*.serial/ -name console)
> for console in ${consoles}; do
> 	echo -n N > ${console}
> done
> 
> # Configure PM runtime autosuspend
> uarts=$(find /sys/bus/platform/devices/4*.serial/power/ -type d)
> for uart in $uarts; do
> 	echo -n 3000 > $uart/autosuspend_delay_ms
> 	echo -n enabled > $uart/wakeup
> 	echo -n auto > $uart/control
> done
> 
> # Configure wake-up from suspend
> uarts=$(find /sys/class/tty/tty[SO]*/power/ -type d 2>/dev/null)
> for uart in $uarts; do
> 	echo -n enabled > $uart/wakeup
> done
> 
> echo -n 1 > /sys/kernel/debug/pm_debug/enable_off_mode
> 
Is this line still needed? I thought I had patched it away.

Regards,
Andreas