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Date: Mon, 7 May 2018 10:10:11 +0200
From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Sam Bobrowicz <sam@elite-embedded.com>
Cc: Loic Poulain <loic.poulain@linaro.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
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        Hugues Fruchet <hugues.fruchet@st.com>
Subject: Re: [PATCH v2 00/12] media: ov5640: Misc cleanup and improvements
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On Fri, May 04, 2018 at 02:13:16PM -0700, Sam Bobrowicz wrote:
> > FYI, I've found the following document:
> > https://community.nxp.com/servlet/JiveServlet/downloadImage/105-32914-9=
9951/ov5640_diagram.jpg
> >
> > So it seems that clock tree is a bit different.
>=20
> So that is where the Digilent RnD team got their information. I was
> working with an ASCII representation of the same diagram, thanks for
> providing that.
>=20
> >
> > So, from my understanding we need to calculate dividers so that:
> > sclk =3D vtot * htot * fps
> > pclk =3D sclk  * byte-per-pixel
> > mipisclk =3D 8 * pclk / num-lanes
>=20
> Unfortunately there are more factors at play depending on what
> features you are using in the ISP. Easiest way for me to describe them
> is to just complete my patches, then we can discuss further.

Do we support any of those features at the moment? If not, then we
shouldn't worry about it too much for now.

Maxime

--=20
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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