Re: [PATCH RFC 1/8] dt-bindings: Document the hi6220 bindings for DRM driver
From: Xinwei Kong
Date: Wed Sep 16 2015 - 04:35:50 EST
hi architt
On 2015/9/16 2:11, Rob Herring wrote:
> On 09/15/2015 04:37 AM, Xinwei Kong wrote:
>> This adds documentation of device tree bindings for the
>> Graphics Processing Unit of hi6220 SOC.
>>
>> Signed-off-by: Xinliang Liu <xinliang.liu@xxxxxxxxxx>
>> Signed-off-by: Xinwei Kong <kong.kongxinwei@xxxxxxxxxxxxx>
>> Signed-off-by: Andy Green <andy.green@xxxxxxxxxx>
>> Signed-off-by: Jiwen Qi <qijiwen@xxxxxxxxxxxxx>
>> Signed-off-by: Yu Gong <gongyu@xxxxxxxxxxxxx>
>> ---
>> .../devicetree/bindings/gpu/hisilicon,hi6220.txt | 69 ++++++++++++++++++++++
>> 1 file changed, 69 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
>>
>> diff --git a/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt b/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
>> new file mode 100644
>> index 0000000..173ac63
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
>> @@ -0,0 +1,69 @@
>> + * Hisilicon hi6220 Graphics Processing Unit for HiKey board
>> +
>> + ** display-subsystem: Master device for binding DRM sub-components
>
> DRM is a Linuxism that doesn't belong in the binding.
>
>> + This master device is parent node and it will be responsible to bind all
>> + sub-components devices node.
>
> Are these nodes a single block in the h/w? If not, you should describe
> the connection of sub-nodes with of-graph instead.
>
>> + - Required properties :
>> + - compatible: "hisilicon,display-subsystem".
>> + - #address-cells, #size-cells: Must be present if the device has sub-nodes.
>> + - ranges: to allow probing of subdevices.
>> + - dma-coherent: Present if dma operations are coherent.
>> +
>> + ** ade: Graphic overlay, Graphic post-processing, display timing control.
>> + This device is child node of display-subsystem
>> + - Required properties :
>> + - compatible: "hisilicon,hi6220-ade".
>> + - reg: physical base address of the ADE register and length of memory
>> + region.
>> + - reg-names: Should contain the reg names "ade_base" and "media_base".
>> + - interrupt: The interrupt number to the cpu. Defines the interrupt
>> + by ADE.
>> + - clocks: The clocks needed by the ADE module.
>> + - clock-names: the name of the clocks.
>> +
>> + ** dsi: support mipi dsi interface
>> + This device is child node of display-subsystem
>> + - Required properties :
>> + - compatible: "hisilicon,hi6220-dsi".
>> + - reg: physical base address of the DSI register and length of memory
>> + region.
>> + - clocks: The clocks needed by the DSI module.
>> + - clock-names: the name of the clocks.
>> + - encoder-slave: phandles to a 'encoder-slave' subnode which DSI connect
>> + ADV7533 in order to support hdmi display.
>
> What the ADV7533 binding looks like is still being discussed.
> "encoder-slave" is certainly DRM specific and not how it should be done.
> Most likely, this needs to use the of-graph ports.
>
I dont how to implement the encoder bridge stuff in upstream,
you think that I will how to handle this part?
Thank you
xinwei
> Also, the ADV7533 connection is specific to HiKey. This binding should
> just generically describe how any bridge or panel is connected.
>
> Rob
>
> .
>
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