Re: [PATCH] media: rcar-csi2: Update D-PHY startup on V4M

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Hej Sakari,

On 2024-12-12 07:20:15 +0000, Sakari Ailus wrote:
> Hej Niklas,
> 
> On Tue, Dec 10, 2024 at 04:54:00PM +0100, Niklas Söderlund wrote:
> > The latest datasheet (Rev.0.70) updates the D-PHY start-up sequence for
> > D-PHY operation. Unfortunately the datasheet do not add any additional
> > documentation on the magic values.
> > 
> > This have been tested together with the MAX96724 available on the single
> > board test platform and it works as expected.
> > 
> > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
> 
> This looks like a fix. Is there a need to backport it?

It's an update to the start-up sequence. Both the old and new sequence 
works in testing. As the datasheet don't document the magic values it's 
hard to tell if this is a real fix or not.

On the other hand, the DTS changes needed to use this device on R-Car 
V4M are still pending upstream merge so we have no in-tree users of this 
device. I don't think we need to backport this change.

-- 
Kind Regards,
Niklas Söderlund




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