Re: [PATCH v2 05/12] media: ipu-bridge: Use v4l2_fwnode for unknown rotations

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Hi Ricardo,

On Tue, Jul 08, 2025 at 11:16:25AM +0200, Ricardo Ribalda wrote:
> Hi Sakari
> 
> Thanks for your review
> 
> On Mon, 7 Jul 2025 at 23:45, Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> wrote:
> >
> > Hi Ricardo,
> >
> > On Thu, Jun 05, 2025 at 05:52:58PM +0000, Ricardo Ribalda wrote:
> > > The v4l2_fwnode_device_properties contains information about the
> > > rotation. Use it if the ssdb data is inconclusive.
> >
> > As SSDB and _PLD provide the same information, are they always aligned? Do
> > you have any experience on how is this actually in firmware?
> 
> Not really, in ChromeOS we are pretty lucky to control the firmware.
> 
> @HdG Do you have some experience/opinion here?
> 
> >
> > _PLD is standardised so it would seem reasonable to stick to that -- if it
> > exists. Another approach could be to pick the one that doesn't translate to
> > a sane default (0°).
> 
> I'd rather stick to the current prioritization unless there is a
> strong argument against it. Otherwise there is a chance that we will
> have regressions (outside CrOS)

My point was rather there are no such rules currently for rotation: only
SSDB was being used by the IPU bridge to obtain the rotation value,
similarly only _PLD is consulted when it comes to orientation.

-- 
Regards,

Sakari Ailus




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