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Date:   Tue, 21 Sep 2021 10:00:59 +0300
From:   Tony Lindgren <tony@atomide.com>
To:     Andreas Kemnade <andreas@kemnade.info>
Cc:     Jarkko Nikula <jarkko.nikula@bitmer.com>,
        linux-omap@vger.kernel.org,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: Re: Regression with e428e250fde6 on BeagleBoard Rev C2
Message-ID: <YUmDKzMko81wc/C+@atomide.com>
References: <3f6924a7-1934-b94e-2441-4781fe737f32@bitmer.com>
 <YUiOA4QEbZXPmQ7F@atomide.com>
 <20210920165216.34abc4dd@aktux>
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* Andreas Kemnade <andreas@kemnade.info> [210920 15:26]:
> Hi,
> 
> On Mon, 20 Sep 2021 16:34:59 +0300
> Tony Lindgren <tony@atomide.com> wrote:
> 
> > > I fail to understand how omap3isp affects this since it actually disable
> > > clocks after probe. Does it keep some power domain active which then
> > > keeps the timer active etc?  
> > 
> > Sounds like it's because omap3isp never allows the SoC to enter deeper
> > idle states. The mpu clock is stopped for idle states.
> 
> On GTA04 I experienced also some strange pm issues with omap3isp:
> rmmod clears up everything fine.
> 
> After probing, clocks seems to be turned off, but power consumption
> does not drop. It only drops when there is an iommu_detach paired to
> that iommu_attach in the driver.
> But if I add it, the driver does not work properly.

Are you also seeing a timer issue? Or just the omap3isp not idling the
SoC issue?

Regards,

Tony