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Message-ID: <CACK8Z6FfhQ80=aGADb+VAfotr=cnZyeen1NEvc-Lfk4AE4xAbA@mail.gmail.com>
Date:   Tue, 19 Oct 2021 13:07:11 -0700
From:   Rajat Jain <rajatja@...gle.com>
To:     Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, Wolfram Sang <wsa@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Bingbu Cao <bingbu.cao@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Chiranjeevi Rapolu <chiranjeevi.rapolu@...el.com>,
        Hyungwoo Yang <hyungwoo.yang@...el.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Robert Moore <robert.moore@...el.com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-media@...r.kernel.org,
        devel@...ica.org, rajatxjain@...il.com
Subject: Re: ACPI: scan: Obtain device's desired enumeration power state

Hello Sakari,

Thanks for the updated patchset.

On Mon, Oct 18, 2021 at 1:23 PM Sakari Ailus
<sakari.ailus@...ux.intel.com> wrote:
>
> Hi Rajit,
>
> On Wed, Oct 06, 2021 at 07:25:27PM -0700, Rajat Jain wrote:
> >
> > Hello,
> >
> > Now that we have landed the ACPI object for _DSC in the spec:
> > https://lore.kernel.org/linux-acpi/CAJZ5v0gwDEjC9T7wfCqDr7R0q_ptz2nVU52_8i8noXHPEign1g@mail.gmail.com/T/
> >
> > I was wondering what is happening with the corresponding kernel patchset:
> > https://lore.kernel.org/linux-acpi/20210210230800.30291-1-sakari.ailus@linux.intel.com/T/#m24e9f51119cbe6eb39f31c097ea3941d00a0baeb
> >
> > I didn't see any pending comments, so is there a reason it did not land?
>
> Thanks for the ping.
>
> I've rebased the set and switched to _DSC so I believe it is ready to be
> merged now:
>
>         <URL:https://lore.kernel.org/linux-media/20211018121729.6357-1-sakari.ailus@linux.intel.com/T/#t>

I have 1 question. I see that these patches change the EEPROM and the
camera driver's probe routine to work around a device that is not
powered on (in D0 state). I2C core is also not powering it on now if
the ACPI says so. So how / when is the device actually getting powered
on now (being put in D0 state), after these patches?

Thanks,

Rajat

>
> I dropped the ov5670 patch from the set to avoid a conflict, I'll get this
> merged through the media tree when the rest have landed there.
>
> --
> Regards,
>
> Sakari Ailus

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