linux-kernel - Re: [linux-sunxi] Re: [RFC PATCH] ARM: dts: sun8i: add simplefb node for H3

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Date:   Mon, 28 Nov 2016 18:24:24 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Icenowy Zheng <icenowy@...c.xyz>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Jean-Francois Moine <moinejf@...e.fr>,
        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] Re: [RFC PATCH] ARM: dts: sun8i: add simplefb node
 for H3

On Mon, Nov 28, 2016 at 6:19 PM, Icenowy Zheng <icenowy@...c.xyz> wrote:
>
>
> 28.11.2016, 18:07, "Chen-Yu Tsai" <wens@...e.org>:
>> On Mon, Nov 28, 2016 at 5:59 PM, Icenowy Zheng <icenowy@...c.xyz> wrote:
>>>  As there's currently a fork of U-Boot which provides simplefb support
>>
>> Please add it when its finalized...
>>
>>>  for H3, a simplefb node can be added to the device tree.
>>>
>>>  Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>
>>>  ---
>>>
>>>  I'm still not sure which pipeline should I use.
>>
>> You are supposed to add _all_ the pipelines that are available and
>> supported by U-boot. U-boot is then supposed to enable and update
>> the one it set up.
>
> I mean the pipeline string ;-)

Looks good to me. There's no separate frontend/backend in DE 2.0.

ChenYu

>
>>
>> ChenYu
>>
>>>  And, it seems that HDMI Slow Clock is not needed?
>>>
>>>  (seems that it's only for EDID, but simplefb won't use EDID)
>>>
>>>   arch/arm/boot/dts/sun8i-h3.dtsi | 16 ++++++++++++++++
>>>   1 file changed, 16 insertions(+)
>>>
>>>  diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
>>>  index 75a8654..cacc8dd 100644
>>>  --- a/arch/arm/boot/dts/sun8i-h3.dtsi
>>>  +++ b/arch/arm/boot/dts/sun8i-h3.dtsi
>>>  @@ -50,6 +50,22 @@
>>>   / {
>>>          interrupt-parent = <&gic>;
>>>
>>>  + chosen {
>>>  + #address-cells = <1>;
>>>  + #size-cells = <1>;
>>>  + ranges;
>>>  +
>>>  + simplefb_hdmi: framebuffer@0 {
>>>  + compatible = "allwinner,simple-framebuffer",
>>>  + "simple-framebuffer";
>>>  + allwinner,pipeline = "de0-lcd0-hdmi";
>>>  + clocks = <&ccu CLK_BUS_TCON0>, <&ccu CLK_BUS_DE>,
>>>  + <&ccu CLK_BUS_HDMI>, <&ccu CLK_DE>,
>>>  + <&ccu CLK_TCON0>, <&ccu CLK_HDMI>;
>>>  + status = "disabled";
>>>  + };
>>>  + };
>>>  +
>>>          cpus {
>>>                  #address-cells = <1>;
>>>                  #size-cells = <0>;
>>>  --
>>>  2.10.2
>
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