On Tue, 29 Jul 2014, Tony Lindgren wrote: > * Paul Walmsley <paul@xxxxxxxxx> [140729 01:27]: > > On Mon, 28 Jul 2014, Tony Lindgren wrote: > > > > > Hmm I think the difference with the working v3.10 one is that you have > > > root=/dev/mmcblk0p2 instead of root=/dev/nfs. As the Ethernet on beagle > > > is on the USB EHCI, this is still blocking the deeper idle states AFAIK. > > > > Hmm? There's no Ethernet on the 3530 Beagle. > > > > The hardware configuration on those two boards - the 37xxevm and > > the 3530es3beagle - hasn't changed between the two test runs, AFAIK. > > Oh it's the original beagle, sorry. In that case the uart wake interrupts > need to be enabled for the serial wake to work. I did not do that as > I don't have one. I guess that might explain why it fails? Or are you > using RTC wake for your test? Serial wake works fine. But the chip never enters dynamic retention idle as measured by the pm_debug/count differential for CORE powerdomain. Works OK with static suspend. > Wrong link here :) It should be: > > http://www.pwsan.com/omap/testlogs/test_v3.16-rc7/20140727174803/pm/37xxevm/37xxevm_log.txt Oops indeed :-) > > I should probably read back those writes to autosuspend_delay_ms, just to > > make sure they are reaching the right destinations. But you might want to > > confirm that you can see the CORE RET count increasing during dynamic idle > > on your 37xxevm. > > Hmm seems to work on 37xxevm for me with my retention test script: > > uarts=$(find /sys/class/tty/ttyO*/device/power/ -type d) > for uart in $uarts; do > echo 3000 > $uart/autosuspend_delay_ms > done > > uarts=$(find /sys/class/tty/ttyO*/power/ -type d) > for uart in $uarts; do > echo enabled > $uart/wakeup > echo auto > $uart/control > done > > echo 0 > /sys/kernel/debug/pm_debug/enable_off_mode > > Which produces: > > core_pwrdm (ON),OFF:0,RET:7,INA:0,ON:8,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 > > And then setting enable_off_mode: > > core_pwrdm (ON),OFF:15,RET:100,INA:8,ON:124,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 OK thanks for the point of comparison. > And I'm using UART3 like I mentioned earlier, but I doubt that > makes a difference. > > Are you maybe missing "echo auto > $uart/control"? It should be doing both of those things, according to the logs: -------- # # for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do echo enabled > $u/power/wakeup; done # %% Start retention double suspend/resume UART wakeup test # for u in `ls -1d /sys/class/tty/ttyO* | paste -s -d' '`; do echo auto > $u/power/control; done -------- I will add code to read back the values from the sysfs files, just to make sure they are being set. - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
