linux-kernel - Re: [PATCH 1/2] dt-bindings: Document the VC4 DSI module nodes.

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Date:   Fri, 27 Jan 2017 18:41:37 -0800
From:   Eric Anholt <eric@...olt.net>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-rpi-kernel@...ts.infradead.org,
        "linux-arm-kernel\@lists.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        Stephen Warren <swarren@...dotorg.org>,
        Lee Jones <lee@...nel.org>,
        "bcm-kernel-feedback-list\@broadcom.com" 
        <bcm-kernel-feedback-list@...adcom.com>,
        linux-clk <linux-clk@...r.kernel.org>,
        "devicetree\@vger.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: Document the VC4 DSI module nodes.

Rob Herring <robh+dt@...nel.org> writes:

> Need to cc DT list if you want it in my queue.
>
> On Mon, Jan 23, 2017 at 6:38 PM, Eric Anholt <eric@...olt.net> wrote:
>> These are part of the vc4 display pipeline.
>>
>> Signed-off-by: Eric Anholt <eric@...olt.net>
>> ---
>>  .../devicetree/bindings/display/brcm,bcm-vc4.txt   | 35 ++++++++++++++++++++++
>>  1 file changed, 35 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
>> index e2768703ac2b..34c7fddcea39 100644
>> --- a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
>> +++ b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
>> @@ -56,6 +56,18 @@ Required properties for V3D:
>>  - interrupts:  The interrupt number
>>                   See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
>>
>> +Required properties for DSI:
>> +- compatible:  Should be "brcm,bcm2835-dsi0" or "brcm,bcm2835-dsi1"
>
> Are the blocks different?

They are from the same lineage, but very different (old dsi0 is 1 lane,
dsi1 is 4 lanes).  You can see how much the registers move around and
change in the dsi->port conditional blocks in the driver code.

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