linux-kernel - Re: [linux-sunxi] [PATCH 07/15] dt-bindings: display: sun4i-drm: Add R40 HDMI pipeline

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Message-ID: <CAGRGNgU+PaygxkVkfcxUqMeV1TijJrZRkPkff7b4cxdVY6NQLA@mail.gmail.com>
Date:   Sun, 20 May 2018 11:50:25 +1000
From:   Julian Calaby <julian.calaby@...il.com>
To:     jernej.skrabec@...l.net
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree <devicetree@...r.kernel.org>,
        "Mailing List, Arm" <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:COMMON CLK FRAMEWORK" <linux-clk@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH 07/15] dt-bindings: display: sun4i-drm: Add
 R40 HDMI pipeline

Hi Jernej,

On Sun, May 20, 2018 at 4:31 AM, Jernej Skrabec <jernej.skrabec@...l.net> wrote:
> Missing compatibles and descriptions needed to implement R40 HDMI
> pipeline are added.
>
> For mixers only compatibles are added.
>
> TCON description is expanded with R40 TV TCON compatibles. If the SoC
> has TCON TOP unit, phandle to that unit has to be specified. Additional
> clock has to be specified if SoC has TCON TOP and TCON is TV TCON.
>
> New compatible is added for DWC HDMI PHY, which has additional clock
> specified.

There's a bunch of A64 related stuff mixed in here, is the R40
compatible with the A64's parts? If so, you should probably mention
that in the commit log.

> Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> ---
>  .../bindings/display/sunxi/sun4i-drm.txt         | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> index a099957ab62a..634276f713e8 100644
> --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> @@ -111,8 +112,9 @@ Required properties:
>    - resets: phandle to the reset controller driving the PHY
>    - reset-names: must be "phy"
>
> -H3 HDMI PHY requires additional clock:
> +H3 and A64 HDMI PHY requires additional clocks:
>    - pll-0: parent of phy clock
> +  - pll-1: second possible phy clock parent (A64 only)

Maybe split this into two:

H3 HDMI PHY ...
   - pll-0: ...

A64 HDMI PHY ...
   - pll-0: ...
   - pll-1: ...

At the moment a quick reading implies that H3 needs pll-1.

Thanks,

-- 
Julian Calaby

Email: julian.calaby@...il.com
Profile: http://www.google.com/profiles/julian.calaby/