Re: [linux-sunxi] [PATCH 1/2] ARM: sun8i: v3s: add device nodes for DE2 display pipeline

From: Icenowy Zheng
Date: Thu May 25 2017 - 09:55:15 EST




ä 2017å5æ25æ GMT+08:00 äå4:37:31, Chen-Yu Tsai <wens@xxxxxxxx> åå:
>On Wed, May 24, 2017 at 7:17 PM, Icenowy Zheng <icenowy@xxxxxxx> wrote:
>> Allwinner V3s SoC features a "Display Engine 2.0" with only one mixer
>> and only one TCON connected to this mixer, which have RGB LCD output.
>>
>> Add device nodes for this display pipeline.
>>
>> Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
>> ---
>> arch/arm/boot/dts/sun8i-v3s.dtsi | 83
>++++++++++++++++++++++++++++++++++++++++
>> 1 file changed, 83 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi
>b/arch/arm/boot/dts/sun8i-v3s.dtsi
>> index a49ebef53c91..3a06dc5b3746 100644
>> --- a/arch/arm/boot/dts/sun8i-v3s.dtsi
>> +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
>> @@ -61,6 +61,12 @@
>> };
>> };
>>
>> + de: display-engine {
>> + compatible = "allwinner,sun8i-v3s-display-engine";
>> + allwinner,pipelines = <&mixer0>;
>> + status = "disabled";
>> + };
>> +
>> timer {
>> compatible = "arm,armv7-timer";
>> interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) |
>IRQ_TYPE_LEVEL_LOW)>,
>> @@ -95,6 +101,83 @@
>> #size-cells = <1>;
>> ranges;
>>
>> + display_clocks: clock@1000000 {
>> + compatible = "allwinner,sun8i-v3s-de2-clk";
>> + reg = <0x01000000 0x100000>;
>> + clocks = <&ccu CLK_DE>,
>> + <&ccu CLK_BUS_DE>;
>> + clock-names = "mod",
>> + "bus";
>> + resets = <&ccu RST_BUS_DE>;
>> + #clock-cells = <1>;
>> + #reset-cells = <1>;
>> + };
>> +
>> + mixer0: mixer@1100000 {
>
>Since there's only one, can you drop the numbering suffix?
>Same with the TCON.

I just want to keep the consistency with dual-pipeline SoCs. (H3, A64, H5, etc)

However, if dropping it is better, I will drop it -- I think usually for things
that is available for multiple on some SoCs and single on others,
we keep the 0 in node name...

>
>> + compatible = "allwinner,sun8i-v3s-de2-mixer";
>> + reg = <0x01100000 0x100000>;
>
>The display engine also has an interrupt. Please list it

It's a overall interrupt for DE2, not mixer interrupt.

I will add it after we have proper interrupt chaining facility for DE2.

It cannot fit here in mixer node.

>
>ChenYu