linux-kernel - Re: [PATCH 0/6] media: sun6i: Separate H3 compatible from A31

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Date:   Fri, 14 Dec 2018 10:23:46 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     sakari.ailus@....fi
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] media: sun6i: Separate H3 compatible from A31

On Fri, Dec 14, 2018 at 6:10 AM <sakari.ailus@....fi> wrote:
>
> Hi Chen-Yu,
>
> On Fri, Nov 30, 2018 at 03:58:43PM +0800, Chen-Yu Tsai wrote:
> > The CSI (camera sensor interface) controller found on the H3 (and H5)
> > is a reduced version of the one found on the A31. It only has 1 channel,
> > instead of 4 channels supporting time-multiplexed BT.656 on the A31.
> > Since the H3 is a reduced version, it cannot "fallback" to a compatible
> > that implements more features than it supports.
> >
> > This series separates support for the H3 variant from the A31 variant.
> >
> > Patches 1 ~ 3 separate H3 CSI from A31 CSI in the bindings, driver, and
> > device tree, respectively.
> >
> > Patch 4 adds a pinmux setting for the MCLK (master clock). Some camera
> > sensors use the master clock from the SoC instead of a standalone
> > crystal.
>
> I've picked patches 1 and 2, but I presume patches 3 and 4 would go through
> another tree. Is that right?

We'll merge patch 3 through the sunxi tree, probably as a fix for 4.21-rc.
Maxime has said that pinmux settings won't be merged unless there are actual
users in tree, so patch 4 won't be merged for now.

Thanks!
ChenYu

>
> >
> > Patches 5 and 6 are examples of using a camera sensor with an SBC.
> > Since the modules are detachable, these changes should not be merged.
> > They should be implemented as overlays instead.
> >
> > Please have a look.
> >
> > In addition, I found that the first frame captured seems to always be
> > incomplete, with either parts cropped, out of position, or missing
> > color components.
>
>
> --
> Regards,
>
> Sakari Ailus