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From: Philipp Zabel <p.zabel@pengutronix.de>
To: Samuel Bobrowicz <sam@elite-embedded.com>, linux-media@vger.kernel.org
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Subject: Re: OV5640 with 12MHz xclk
Date: Mon, 16 Apr 2018 15:04:26 +0200	[thread overview]
Message-ID: <1523883866.5918.10.camel@pengutronix.de> (raw)
In-Reply-To: <CAFwsNOEF0rK+SeHQ618Rnuj2ZWaGZG2WY4keWmavqG_agSi+dw@mail.gmail.com>

On Sun, 2018-04-15 at 18:39 -0700, Samuel Bobrowicz wrote:
> Can anyone verify if the OV5640 driver works with input clocks other
> than the typical 24MHz? The driver suggests anything from 6MHz-24MHz
> is acceptable, but I am running into issues while bringing up a module
> that uses a 12MHz oscillator. I'd expect that different xclk's would
> necessitate different register settings for the various resolutions
> (PLL settings, PCLK width, etc.), however the driver does not seem to
> modify nearly enough based on the frequency of xclk.
> 
> Sam
> 

Have you seen Maxime's recent "media: ov5640: Misc cleanup and
improvements" series, especially patch 08/12 ("media: ov5640: Adjust the
clock based on the expected rate")? That seems to be something you'd
need.

regards
Philipp

      parent reply	other threads:[~2018-04-16 13:04 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-16  1:39 OV5640 with 12MHz xclk Samuel Bobrowicz
2018-04-16 12:26 ` Hans Verkuil
2018-04-16 18:44   ` Steve Longerbeam
2018-04-16 23:03     ` Samuel Bobrowicz
2018-04-16 13:04 ` Philipp Zabel [this message]

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