linux-kernel - Re: [linux-sunxi] [PATCH v11 1/2] dt-bindings: media: Add Allwinner V3s Camera Sensor Interface (CSI)

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Message-ID: <CAMty3ZD3TDOC_PSvbEtopT12pCmXCDqZQdPVB9GNC7wOrj_LYQ@mail.gmail.com>
Date:   Wed, 17 Oct 2018 13:03:03 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Yong Deng <yong.deng@...ewell.com>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>, davem@...emloft.net,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        akpm@...ux-foundation.org, arnd@...db.de,
        Hans Verkuil <hans.verkuil@...co.com>,
        laurent.pinchart@...asonboard.com, geert@...ux-m68k.org,
        jacob-chen@...wrt.com, Neil Armstrong <narmstrong@...libre.com>,
        treding@...dia.com, Philipp Zabel <p.zabel@...gutronix.de>,
        todor.tomov@...aro.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media <linux-media@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH v11 1/2] dt-bindings: media: Add Allwinner
 V3s Camera Sensor Interface (CSI)

On Wed, Sep 26, 2018 at 2:11 PM Yong Deng <yong.deng@...ewell.com> wrote:
>
> Add binding documentation for Allwinner V3s CSI.
>
> Acked-by: Maxime Ripard <maxime.ripard@...tlin.com>
> Acked-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Yong Deng <yong.deng@...ewell.com>
> ---
>  .../devicetree/bindings/media/sun6i-csi.txt        | 59 ++++++++++++++++++++++
>  1 file changed, 59 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/sun6i-csi.txt
>
> diff --git a/Documentation/devicetree/bindings/media/sun6i-csi.txt b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> new file mode 100644
> index 000000000000..2ff47a9507a6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> @@ -0,0 +1,59 @@
> +Allwinner V3s Camera Sensor Interface
> +-------------------------------------
> +
> +Allwinner V3s SoC features two CSI module. CSI0 is used for MIPI CSI-2
> +interface and CSI1 is used for parallel interface.
> +
> +Required properties:
> +  - compatible: value must be "allwinner,sun8i-v3s-csi"
> +  - reg: base address and size of the memory-mapped region.
> +  - interrupts: interrupt associated to this IP
> +  - clocks: phandles to the clocks feeding the CSI
> +    * bus: the CSI interface clock
> +    * mod: the CSI module clock
> +    * ram: the CSI DRAM clock
> +  - clock-names: the clock names mentioned above
> +  - resets: phandles to the reset line driving the CSI
> +
> +Each CSI node should contain one 'port' child node with one child 'endpoint'
> +node, according to the bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt. As mentioned
> +above, the endpoint's bus type should be MIPI CSI-2 for CSI0 and parallel or
> +Bt656 for CSI1.

But A64 manual claimed that CSI0 is parallel (ofcourse it has only one
controller). On the other-side the register space seems similar. and
also is Bt656 and CCIR656 are same types?

-- 
Jagan Teki
Senior Linux Kernel Engineer | Amarula Solutions
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.