"Nayak, Rajendra" <rna...@ti.com> writes: > What Silicon Rev does your SDP have? I currently am using an ES3.1 based SDP > and I havent seen any of these issues you have reported with off-while-idle.
I have and ES3.0 SDP. > Infact I have kept the board running overnight a couple times in the last > week > with off-while-idle and voltage scaling to 0v enabled, mainly to test the > recent > patch set (disabling Auto idle for PER in scratchpad memory) for stability. Ah, great. That is really good to know. Are you using omap_3430sdp_pm_defconfig? I see the same problems with and without your patches. > I will see if I can get hold of an ES3 and ES2.1 based SDP's and see if I > reproduce > the issue. Besides I use nfs and I am not sure if that's got something to do > with it. > Will try a ramdisk also. I'm using a ramdisk. > Does it take you a while to reproduce this, or is it seen after the very > first UART > inactivity? It happens on the first try. Could you try my uImage which has my initramfs rootfs built-in on your ES3.1 SDP? http://userweb.kernel.org/~khilman/tmp/rajendra/uImage.pm-vanilla Immediately after booting, I do # echo 1 > /sys/power/enable_off_mode # echo 1 > /sys/power/voltage_off_while_idle # echo 1 > /sys/power/sleep_while_idle and after UART inactivity, I start to see sys_off_mode LED blinking. Kevin >>-----Original Message----- >>From: linux-omap-ow...@vger.kernel.org >>[mailto:linux-omap-ow...@vger.kernel.org] On Behalf Of Kevin Hilman >>Sent: Wednesday, June 17, 2009 2:35 AM >>To: Nayak, Rajendra; Woodruff, Richard >>Cc: linux-omap@vger.kernel.org >>Subject: OMAP3 PM: off-mode during idle, problem with UART1 console >> >>Rajendra, Richard, >> >>Hoping you can shed some light, or give me some direction on where to >>debug this further... >> >>With the latest PM branch, I've notice that off-while idle isn't >>working on the SDP, but the same kernel works fine on the RX51. >>RET-while-idle works fine on both. This is with CPUidle disabled, so >>just using the default idle where MPU and CORE are changed together. >> >>More specifically, it seems to be the UART1 (CORE) console that never >>comes back from off-while-idle, but the UART3 (PER) console on RX51 >>works. >> >>On SDP, if I >> >># echo 1 > /sys/power/enable_off_mode >># echo 1 > /sys/power/voltage_off_while_idle >># echo 1 > /sys/power/sleep_while_idle >> >>After the UART inactivty timeout of 5 seconds, I start to see the >>sys_off_mode LED toggling between red and green with system timer >>wakeups. >> >>If I then push a key on the UART1 console, the LED goes green, stays >>for the 5 second UART inactivity and then goes back to toggling >>red/green again. However, I never get my console back and never see >>the characters on my console. >> >>If I keep typing, I keep the system from going back off (based on >>sys_off_mode LED) and as soon as I stop typing long enough for the >>inactivity timer to expiere (5 seconds) it goes back into off. >> >>Any ideas what's going on here? >> >>On RX51, the same thing works using UART3. >> >>Kevin >> >>-- >>To unsubscribe from this list: send the line "unsubscribe >>linux-omap" in >>the body of a message to majord...@vger.kernel.org >>More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
