RE: OMAP3 PM: off-mode during idle, problem with UART1 console
-Original Message- From: Kevin Hilman [mailto:khil...@deeprootsystems.com] Sent: Wednesday, June 17, 2009 8:37 PM To: Nayak, Rajendra Cc: Woodruff, Richard; linux-omap@vger.kernel.org Subject: Re: OMAP3 PM: off-mode during idle, problem with UART1 console 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, This image works just fine on both my ES3.1 GP as well as ES3.0 EMU SDP. After the sys_off LED blinks, a key press stops the blinking and also gets be the debug console back. regards, Rajendra -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
Re: OMAP3 PM: off-mode during idle, problem with UART1 console
Nayak, Rajendra rna...@ti.com writes: -Original Message- From: Kevin Hilman [mailto:khil...@deeprootsystems.com] Sent: Wednesday, June 17, 2009 8:37 PM To: Nayak, Rajendra Cc: Woodruff, Richard; linux-omap@vger.kernel.org Subject: Re: OMAP3 PM: off-mode during idle, problem with UART1 console 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, This image works just fine on both my ES3.1 GP as well as ES3.0 EMU SDP. After the sys_off LED blinks, a key press stops the blinking and also gets be the debug console back. Rajendra, Thanks a lot for testing. It sounds like something specific to the ES3.0 GP SDP. 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
RE: OMAP3 PM: off-mode during idle, problem with UART1 console
-Original Message- From: Kevin Hilman [mailto:khil...@deeprootsystems.com] Sent: Friday, June 19, 2009 11:21 AM Thanks a lot for testing. It sounds like something specific to the ES3.0 GP SDP. Are DIP switches the same? ROM code may touch UART in one case and not the other. Regards, Richard W. -- 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
RE: OMAP3 PM: off-mode during idle, problem with UART1 console
Kevin, 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. 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. 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. Does it take you a while to reproduce this, or is it seen after the very first UART inactivity? regards, Rajendra -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
RE: OMAP3 PM: off-mode during idle, problem with UART1 console
Kevin, Can you ping the system via network during on time? - generate some activity on uart to be awake then try. Why not fire up a second tty/shell on UART3 or just try with uart 3 on SDP. Bootargs change is easy enough. - this can say if you have uart specific issue or maybe core vs per Did you hook up your emulator and connect during awake time of uart timer? It should really tell a lot. Regards, Richard W. -Original Message- From: Nayak, Rajendra Sent: Wednesday, June 17, 2009 1:12 AM To: Kevin Hilman; Woodruff, Richard Cc: linux-omap@vger.kernel.org Subject: RE: OMAP3 PM: off-mode during idle, problem with UART1 console Kevin, 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. 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. 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. Does it take you a while to reproduce this, or is it seen after the very first UART inactivity? regards, Rajendra -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
Re: OMAP3 PM: off-mode during idle, problem with UART1 console
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
Re: OMAP3 PM: off-mode during idle, problem with UART1 console
Woodruff, Richard r-woodru...@ti.com writes: Can you ping the system via network during on time? Yes. - generate some activity on uart to be awake then try. Yes, ping works before, after and during off-while-idle. Why not fire up a second tty/shell on UART3 or just try with uart 3 on SDP. Bootargs change is easy enough. - this can say if you have uart specific issue or maybe core vs per Indeed, using UART3 on SDP works as expected, only UART 1 has the problem. Did you hook up your emulator and connect during awake time of uart timer? It should really tell a lot. Will give that a try. Thanks, Kevin -Original Message- From: Nayak, Rajendra Sent: Wednesday, June 17, 2009 1:12 AM To: Kevin Hilman; Woodruff, Richard Cc: linux-omap@vger.kernel.org Subject: RE: OMAP3 PM: off-mode during idle, problem with UART1 console Kevin, 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. 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. 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. Does it take you a while to reproduce this, or is it seen after the very first UART inactivity? regards, Rajendra -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
