From: "Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>
To: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org
Subject: Re: [PATCH] media: rcar-csi2: Update D-PHY startup on V4M
Date: Thu, 12 Dec 2024 11:04:45 +0100 [thread overview]
Message-ID: <20241212100445.GB878403@ragnatech.se> (raw)
In-Reply-To: <Z1qOr7oSdIr3R3ee@kekkonen.localdomain>
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@ragnatech.se>
>
> 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
next prev parent reply other threads:[~2024-12-12 10:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-10 15:54 [PATCH] media: rcar-csi2: Update D-PHY startup on V4M Niklas Söderlund
2024-12-12 7:20 ` Sakari Ailus
2024-12-12 10:04 ` Niklas Söderlund [this message]
2024-12-12 11:21 ` Sakari Ailus
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