From mboxrd@z Thu Jan 1 00:00:00 1970 From: sre@kernel.org (Sebastian Reichel) Date: Sun, 1 May 2016 17:48:56 +0200 Subject: Nokia N900 retention mode in v4.6, camera buttons fun In-Reply-To: <20160501085236.GA14243@amd> References: <20160411093023.GC11814@amd> <20160411094130.GA5753@amd> <20160411211026.GH5995@atomide.com> <20160412121658.GA32486@amd> <20160412123013.GA12296@amd> <20160412163055.GP5995@atomide.com> <20160417175539.GA502@amd> <20160421130450.GQ29406@pali> <20160429200559.GA16598@earth> <20160501085236.GA14243@amd> Message-ID: <20160501154855.GA24970@earth> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, On Sun, May 01, 2016 at 10:52:36AM +0200, Pavel Machek wrote: > On Fri 2016-04-29 22:06:00, Sebastian Reichel wrote: > > On Thu, Apr 21, 2016 at 03:04:50PM +0200, Pali Roh?r wrote: > > > > 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? > > > > I wasn't aware, that pm_runtime_irq_safe() basically breaks runtime > > PM until Tony's fix for musb (even though it's logical when thinking > > about it). Currently omap-ssi and omap-ssi-port make use of > > pm_runtime_irq_safe(). > > > > Since pm_runtime_get_sync/pm_runtime_put_sync is called from > > tasklets in omap-ssi (and omap-ssi-port) it cannot be simply > > removed. So fixing PM for the ssi controller requires reworking > > the driver in a non trivial way. > > I see latest series, and it also talks about frequency scaling. But I > guess it is not going to fix this issue? No, this is independent of the runtime PM problems. I also worked on runtime PM/idling yesterday and pm_runtime_irq_safe is the main culprit for breaking it (not the only one, though). It's not yet finished though -- Sebastian -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: not available URL: