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

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Hejssan,

On Thu, Dec 12, 2024 at 11:04:45AM +0100, Niklas Söderlund wrote:
> 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.

Ack. Thanks for confirming this.

-- 
Sakari Ailus




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