linux-kernel - Re: [PATCH 06/14] media: sun4i-csi: Add support for A10 CSI1 camera sensor interface

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Message-ID: <20191216133836.n4sej7jqhzwxljnl@gilmour.lan>
Date:   Mon, 16 Dec 2019 14:38:36 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     Chen-Yu Tsai <wens@...nel.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH 06/14] media: sun4i-csi: Add support for A10 CSI1 camera
 sensor interface

On Mon, Dec 16, 2019 at 12:59:16AM +0800, Chen-Yu Tsai wrote:
> From: Chen-Yu Tsai <wens@...e.org>
>
> The A10/A20 Allwinner SoCs have two camera sensor interface blocks,
> named CSI0 and CSI1. The two have the same register layouts with
> slightly different features:
>
>   - CSI0 has an image signal processor (ISP); CSI1 doesn't
>
>   - CSI0 can support up to four separate channels under CCIR656;
>     CSI1 can only support one
>
>   - CSI0 can support up to 16-bit wide bus with YUV422;
>     CSI1 can support up to 24-bit wide bus with YUV444
>
> For now the driver doesn't support wide busses, nor CCIR656. So the
> only relevant difference is whether a clock needs to be taken and
> enabled for the ISP.
>
> Add structs to record the differences, tie them to the compatible
> strings, and deal with the ISP clock. Support for the new CSI1
> hardware block is added as well.
>
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>

Acked-by: Maxime Ripard <mripard@...nel.org>

Thanks!
Maxime

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