From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: OMAP3 PM: off-mode during idle, problem with UART1 console Date: Fri, 19 Jun 2009 09:20:49 -0700 Message-ID: <87ab44xkim.fsf@deeprootsystems.com> References: <5A47E75E594F054BAF48C5E4FC4B92AB0305A54975@dbde02.ent.ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from wf-out-1314.google.com ([209.85.200.172]:31509 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752058AbZFSQUt (ORCPT ); Fri, 19 Jun 2009 12:20:49 -0400 Received: by wf-out-1314.google.com with SMTP id 26so893603wfd.4 for ; Fri, 19 Jun 2009 09:20:51 -0700 (PDT) In-Reply-To: <5A47E75E594F054BAF48C5E4FC4B92AB0305A54975@dbde02.ent.ti.com> (Rajendra Nayak's message of "Fri\, 19 Jun 2009 15\:12\:44 +0530") Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "Nayak, Rajendra" Cc: "Woodruff, Richard" , "linux-omap@vger.kernel.org" "Nayak, Rajendra" writes: >>-----Original Message----- >>From: Kevin Hilman [mailto:khilman@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" 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