* Paul Walmsley <paul@xxxxxxxxx> [140725 12:16]: > On Mon, 7 Jul 2014, Tony Lindgren wrote: > > > With v3.16-rc4 the PM features for omap3 should be working > > finally for device tree based booting. At lest beaglexm and > > 3xxevm should work. > > Just to follow up briefly on this: there was indeed a bug in the OMAP3 > test scripts here that resulted in the UART wakeup not being enabled. > > Once that was fixed, system suspend-based chip-retention and chip-off > modes work. OK > However, scheduler-idle based chip-retention and chip-off still are not > working. Looking at the logs, it appears that some domains are not > dynamically going idle. For example, looking at: > > http://www.pwsan.com/omap/testlogs/test_v3.16-rc6/20140724142225/pm/37xxevm/37xxevm_log.txt > > it can be seen that core_pwrdm's retention count doesn't increase between > the two PM debug dumps. The important lines are: > > core_pwrdm (ON),OFF:0,RET:2,INA:0,ON:3,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 > > and > > core_pwrdm (ON),OFF:0,RET:2,INA:0,ON:3,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 > > That's why the test reports mark the dynamic PM modes as failing. > > ... > > Here's an example where things worked: > > http://www.pwsan.com/omap/testlogs/test_v3.10/20130717134228/pm/3530es3beagle/3530es3beagle_log.txt > > In this one, it can be seen that the CORE counts transitioned from: > > core_pwrdm (ON),OFF:0,RET:2,INA:0,ON:3,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 > > to > > core_pwrdm (ON),OFF:0,RET:10,INA:0,ON:11,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0 > > between the retention suspend/resume test ending and the dynamic > retention idle test ending. 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. Care to test -rc7 with root=/dev/mmcblk0p2 to see if that works? On the am37xx-evm nfsroot will work as it's on the GPMC bus. Regards, Tony -- 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
