linux-kernel - Re: [PATCH 3/4] media: mt9m111: fix device power usage

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Message-ID: <Y8XMP7+HrABQCaMR@valkosipuli.retiisi.eu>
Date:   Tue, 17 Jan 2023 00:14:23 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Marco Felsch <m.felsch@...gutronix.de>
Cc:     Sakari Ailus <sakari.ailus@...ux.intel.com>, mchehab@...nel.org,
        laurent.pinchart+renesas@...asonboard.com,
        jacopo+renesas@...ndi.org, akinobu.mita@...il.com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: Re: [PATCH 3/4] media: mt9m111: fix device power usage

Hi Marco,

On Tue, Aug 23, 2022 at 04:44:50PM +0200, Marco Felsch wrote:
> Hi Sakari,
> 
> On 22-08-22, Sakari Ailus wrote:
> > On Mon, Aug 22, 2022 at 09:54:26AM +0200, Marco Felsch wrote:
> > > Hi Sakari,
> > > 
> > > On 22-08-22, Sakari Ailus wrote:
> > > > Hi Marco,
> > > > 
> > > > On Thu, Aug 18, 2022 at 04:47:11PM +0200, Marco Felsch wrote:
> > > > > Currently the driver turn off the power after probe and toggle it during
> > > > > .stream by using the .s_power callback. This is problematic since other
> > > > > callbacks like .set_fmt accessing the hardware as well which will fail.
> > > > > So in the end the default format is the only supported format.
> > > > 
> > > > It'd be much better to add runtime PM support to the driver instead.
> > > 
> > > I got your point, but didn't have the time for it right now, I will drop
> > > the patch from my v2.
> > 
> > The API is different but generally involves doing more or less the same
> > what this and the 4th patch do together.
> 
> I know :) as soon as I got feedback on my TC35 series [1] I give it a
> try and change it to dev-pm.

What's the status of this set?

These are nice improvements but I was expecting v2.

Thanks.

-- 
Sakari Ailus