From: "Pali Rohár" <pali.rohar@gmail.com> To: sre@kernel.org, Pavel Machek <pavel@ucw.cz> Cc: Tony Lindgren <tony@atomide.com>, kernel list <linux-kernel@vger.kernel.org>, linux-arm-kernel <linux-arm-kernel@lists.infradead.org>, linux-omap@vger.kernel.org, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, Tomi Valkeinen <tomi.valkeinen@ti.com> Subject: Re: Nokia N900 retention mode in v4.6, camera buttons fun Date: Thu, 21 Apr 2016 15:04:50 +0200 [thread overview] Message-ID: <20160421130450.GQ29406@pali> (raw) In-Reply-To: <20160417175539.GA502@amd> On Sunday 17 April 2016 19:55:40 Pavel Machek wrote: > Hi! > > > > > > > Ok, it works now. I was doing tests in daylight so it was poorly > > > > > > visible. The right part of keyboard stays lit (but that's expected > > > > > > AFAICT), but the left part blinks. > > > > > > > > > > During idle, both should go off and are doing so for me. Both LEDs off > > > > > indicates off mode, left LED off is for retention mode. So you still > > > > > have something blocking off mode, maybe check: > > > > > > > > > > echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode > > > > > > > > What is the power difference between retention and off? I'm now down > > > > to cca 25mA, which should be around 50 hours standby time. Not ideal, > > > > but should be usable. > > > > The 25mA sounds way too big to me even for retention mode, some > > devices must be still on. > > Yes, cca 60mW. > > > The off mode makes a huge difference for standby time, it should cut > > down the total power consumption to something like 10+ mW with modem > > enabled. Aproximately the breakdown is roughly: 900 uW for omap, 5 mW > > for memory and 5 or more for the modem. Sorry I don't know the exact > > numbers for the modem. But with 37xx torpedo, mainline kernel is > > already getting very close to the 900 uW + 5 mW numbers for the CPU > > module during idle measured from the ina219 shunt on the torpedo > > devkit. > > CONFIG_HSI breaks power management completely, so power management > with modem will be another topic. Sebastian, any idea why power management does not work for HSI? > > > > In the meantime, I found what is causing the rention mode to break for > > > > me: CONFIG_HSI (aka wireless modem support). With HSI off, it seems to work. > > > > > > > > I still get problems with the camera button, in config similar to > > > > defconfig. For some reason, I'm even getting (autorepeating) ^@ on > > > > console. As long as I hold camera button down, I even get it into off > > > > mode for brief period. > > > > > > Ok, if I turn off CONFIG_KEYBOARD_GPIO, I get it into off > > > mode... once per screen blank, for about a second. (Does CONFIG_KEYBOARD_GPIO also cause > > > problems for you?) > > > > > > Any idea why it enters off mode only once after each screenblank? > > > > After disabling CONFIG_PROVE_LOCKING, loading the LCD modules, and > > blanking the screen, my n900 hits off mode just fine about once > > a second. Sounds like you still have some extra devices enabled > > causing it. > > I checked again... also with vanilla 4.6-rc2 to double check... same effect. > > Aha, got it... cat-ing /sys/kernel/debug/pm_debug/count breaks the > off mode. If I don't do that (tm), it seems to work way better. So what is result? Is power management working for CONFIG_KEYBOARD_GPIO? Or problem is somewhere in CONFIG_PROVE_LOCKING? -- Pali Rohár pali.rohar@gmail.com
WARNING: multiple messages have this Message-ID (diff)
From: pali.rohar@gmail.com (Pali Rohár) To: linux-arm-kernel@lists.infradead.org Subject: Nokia N900 retention mode in v4.6, camera buttons fun Date: Thu, 21 Apr 2016 15:04:50 +0200 [thread overview] Message-ID: <20160421130450.GQ29406@pali> (raw) In-Reply-To: <20160417175539.GA502@amd> On Sunday 17 April 2016 19:55:40 Pavel Machek wrote: > Hi! > > > > > > > Ok, it works now. I was doing tests in daylight so it was poorly > > > > > > visible. The right part of keyboard stays lit (but that's expected > > > > > > AFAICT), but the left part blinks. > > > > > > > > > > During idle, both should go off and are doing so for me. Both LEDs off > > > > > indicates off mode, left LED off is for retention mode. So you still > > > > > have something blocking off mode, maybe check: > > > > > > > > > > echo 1 > /sys/kernel/debug/pm_debug/enable_off_mode > > > > > > > > What is the power difference between retention and off? I'm now down > > > > to cca 25mA, which should be around 50 hours standby time. Not ideal, > > > > but should be usable. > > > > The 25mA sounds way too big to me even for retention mode, some > > devices must be still on. > > Yes, cca 60mW. > > > The off mode makes a huge difference for standby time, it should cut > > down the total power consumption to something like 10+ mW with modem > > enabled. Aproximately the breakdown is roughly: 900 uW for omap, 5 mW > > for memory and 5 or more for the modem. Sorry I don't know the exact > > numbers for the modem. But with 37xx torpedo, mainline kernel is > > already getting very close to the 900 uW + 5 mW numbers for the CPU > > module during idle measured from the ina219 shunt on the torpedo > > devkit. > > CONFIG_HSI breaks power management completely, so power management > with modem will be another topic. Sebastian, any idea why power management does not work for HSI? > > > > In the meantime, I found what is causing the rention mode to break for > > > > me: CONFIG_HSI (aka wireless modem support). With HSI off, it seems to work. > > > > > > > > I still get problems with the camera button, in config similar to > > > > defconfig. For some reason, I'm even getting (autorepeating) ^@ on > > > > console. As long as I hold camera button down, I even get it into off > > > > mode for brief period. > > > > > > Ok, if I turn off CONFIG_KEYBOARD_GPIO, I get it into off > > > mode... once per screen blank, for about a second. (Does CONFIG_KEYBOARD_GPIO also cause > > > problems for you?) > > > > > > Any idea why it enters off mode only once after each screenblank? > > > > After disabling CONFIG_PROVE_LOCKING, loading the LCD modules, and > > blanking the screen, my n900 hits off mode just fine about once > > a second. Sounds like you still have some extra devices enabled > > causing it. > > I checked again... also with vanilla 4.6-rc2 to double check... same effect. > > Aha, got it... cat-ing /sys/kernel/debug/pm_debug/count breaks the > off mode. If I don't do that (tm), it seems to work way better. So what is result? Is power management working for CONFIG_KEYBOARD_GPIO? Or problem is somewhere in CONFIG_PROVE_LOCKING? -- Pali Roh?r pali.rohar at gmail.com
next prev parent reply other threads:[~2016-04-21 13:04 UTC|newest] Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-01-23 12:10 N900 sleep mode (in 4.5-rc0, if that matters) Pavel Machek 2016-01-23 12:10 ` Pavel Machek 2016-01-25 16:33 ` Tony Lindgren 2016-01-25 16:33 ` Tony Lindgren 2016-01-25 22:23 ` Pavel Machek 2016-01-25 22:23 ` Pavel Machek 2016-01-25 22:50 ` Tony Lindgren 2016-01-25 22:50 ` Tony Lindgren 2016-01-26 14:00 ` Pavel Machek 2016-01-26 14:00 ` Pavel Machek 2016-01-26 17:25 ` Tony Lindgren 2016-01-26 17:25 ` Tony Lindgren 2016-01-26 22:51 ` Tony Lindgren 2016-01-26 22:51 ` Tony Lindgren 2016-01-30 20:02 ` Pavel Machek 2016-01-30 20:02 ` Pavel Machek 2016-01-30 20:14 ` Pavel Machek 2016-01-30 20:14 ` Pavel Machek 2016-01-30 22:15 ` Pavel Machek 2016-01-30 22:15 ` Pavel Machek 2016-02-01 18:13 ` Tony Lindgren 2016-02-01 18:13 ` Tony Lindgren 2016-02-01 21:17 ` Pavel Machek 2016-02-01 21:17 ` Pavel Machek 2016-02-01 22:11 ` Tony Lindgren 2016-02-01 22:11 ` Tony Lindgren 2016-02-04 5:35 ` Tony Lindgren 2016-02-04 5:35 ` Tony Lindgren 2016-02-07 21:37 ` Pavel Machek 2016-02-07 21:37 ` Pavel Machek 2016-02-07 21:37 ` Pavel Machek 2016-02-08 8:51 ` Pali Rohár 2016-02-08 8:51 ` Pali Rohár 2016-02-07 21:23 ` Pavel Machek 2016-02-07 21:23 ` Pavel Machek 2016-02-09 17:24 ` Tony Lindgren 2016-02-09 17:24 ` Tony Lindgren 2016-02-09 17:38 ` Tony Lindgren 2016-02-09 17:38 ` Tony Lindgren 2016-03-20 8:38 ` Pavel Machek 2016-03-20 8:38 ` Pavel Machek 2016-02-11 1:08 ` Tony Lindgren 2016-02-11 1:08 ` Tony Lindgren 2016-02-11 1:08 ` Tony Lindgren 2016-03-23 14:37 ` Pavel Machek 2016-03-23 14:37 ` Pavel Machek 2016-03-20 8:33 ` Pavel Machek 2016-03-20 8:33 ` Pavel Machek 2016-03-23 12:38 ` Pavel Machek 2016-03-23 12:38 ` Pavel Machek 2016-03-30 19:12 ` Tony Lindgren 2016-03-30 19:12 ` Tony Lindgren 2016-04-04 11:09 ` Pali Rohár 2016-04-04 11:09 ` Pali Rohár 2016-04-04 22:31 ` Tony Lindgren 2016-04-04 22:31 ` Tony Lindgren 2016-04-04 21:30 ` Pavel Machek 2016-04-04 21:30 ` Pavel Machek 2016-04-04 22:07 ` Tony Lindgren 2016-04-04 22:07 ` Tony Lindgren 2016-04-05 10:09 ` Pavel Machek 2016-04-05 10:09 ` Pavel Machek 2016-04-05 13:17 ` Pavel Machek 2016-04-05 13:17 ` Pavel Machek 2016-04-05 14:22 ` 4.4: camera and unlock buttons produce tons of interrupts (was Re: N900 sleep mode) Pavel Machek 2016-04-05 14:22 ` Pavel Machek 2016-04-05 15:29 ` Tony Lindgren 2016-04-05 15:29 ` Tony Lindgren 2016-04-05 20:51 ` Pavel Machek 2016-04-05 20:51 ` Pavel Machek 2016-04-07 17:40 ` Tony Lindgren 2016-04-07 17:40 ` Tony Lindgren 2016-04-07 19:48 ` 4.4, 4.6: " Pavel Machek 2016-04-07 19:48 ` Pavel Machek 2016-04-07 21:32 ` Tony Lindgren 2016-04-07 21:32 ` Tony Lindgren 2016-04-07 23:01 ` Pavel Machek 2016-04-07 23:01 ` Pavel Machek 2016-04-07 23:41 ` Tony Lindgren 2016-04-07 23:41 ` Tony Lindgren 2016-04-08 9:19 ` Pavel Machek 2016-04-08 9:19 ` Pavel Machek 2016-04-11 8:27 ` 4.6-rc2: regression with omap video and lockdep (was Re: 4.4, 4.6: camera and unlock buttons produce tons of interrupts (was Re: N900 sleep mode)) Pavel Machek 2016-04-11 8:27 ` Pavel Machek 2016-04-11 9:30 ` 4.4, 4.6: camera and unlock buttons produce tons of interrupts (was Re: N900 sleep mode) Pavel Machek 2016-04-11 9:30 ` Pavel Machek 2016-04-11 9:41 ` Pavel Machek 2016-04-11 9:41 ` Pavel Machek 2016-04-11 21:10 ` Tony Lindgren 2016-04-11 21:10 ` Tony Lindgren 2016-04-12 12:16 ` Nokia N900 retention mode in v4.6, camera buttons fun Pavel Machek 2016-04-12 12:30 ` Pavel Machek 2016-04-12 12:30 ` Pavel Machek 2016-04-12 16:30 ` Tony Lindgren 2016-04-12 16:30 ` Tony Lindgren 2016-04-13 5:52 ` Tomi Valkeinen 2016-04-13 5:52 ` Tomi Valkeinen 2016-04-13 5:52 ` Tomi Valkeinen 2016-04-13 15:15 ` Tony Lindgren 2016-04-13 15:15 ` Tony Lindgren 2016-04-17 17:55 ` Pavel Machek 2016-04-17 17:55 ` Pavel Machek 2016-04-18 23:47 ` Tony Lindgren 2016-04-18 23:47 ` Tony Lindgren 2016-04-21 13:04 ` Pali Rohár [this message] 2016-04-21 13:04 ` Pali Rohár 2016-04-21 21:28 ` Pavel Machek 2016-04-21 21:28 ` Pavel Machek 2016-04-22 7:05 ` Pali Rohár 2016-04-22 7:05 ` Pali Rohár 2016-04-29 20:06 ` Sebastian Reichel 2016-04-29 20:06 ` Sebastian Reichel 2016-05-01 8:52 ` Pavel Machek 2016-05-01 8:52 ` Pavel Machek 2016-05-01 15:48 ` Sebastian Reichel 2016-05-01 15:48 ` Sebastian Reichel 2016-05-02 20:12 ` Sebastian Reichel 2016-05-02 20:12 ` Sebastian Reichel 2016-05-28 11:09 ` Pavel Machek 2016-05-28 11:09 ` Pavel Machek
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20160421130450.GQ29406@pali \ --to=pali.rohar@gmail.com \ --cc=aaro.koskinen@iki.fi \ --cc=ivo.g.dimitrov.75@gmail.com \ --cc=khilman@kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-omap@vger.kernel.org \ --cc=patrikbachan@gmail.com \ --cc=pavel@ucw.cz \ --cc=serge@hallyn.com \ --cc=sre@kernel.org \ --cc=tomi.valkeinen@ti.com \ --cc=tony@atomide.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.