[PATCH 3/4] dt-bindings: display: imx: add binding for i.MX8MP HDMI PAI

[Liu Ying]

On 07/23/2025, Shengjiu Wang wrote:
> On Tue, Jul 22, 2025 at 3:16 PM Liu Ying <victor.liu at nxp.com> wrote:
>>
>> Hi Shengjiu,
>>
>> On 07/18/2025, Shengjiu Wang wrote:
>>> Add binding for the i.MX8MP HDMI parallel Audio interface block.
>>> As this port is linked to imx8mp-hdmi-tx, add port at 2 in
>>> fsl,imx8mp-hdmi-tx.yaml document.
>>>
>>> Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
>>> ---
>>>  .../display/bridge/fsl,imx8mp-hdmi-tx.yaml    | 13 ++++
>>>  .../display/imx/fsl,imx8mp-hdmi-pai.yaml      | 61 +++++++++++++++++++
>>>  2 files changed, 74 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pai.yaml

[...]

>>> +properties:
>>
>> In i.MX8MP TRM, HTX_PAI block diagram mentions an APB interface.
>> Does it mean a clock is needed?
> 
> The APB clock is bound with the power domain, so no need to add it here.

That depends on OS's power domain driver implementation.
>From DT's point of view, the APB clock should be a property here.

> 
>>
>>> +  compatible:
>>> +    const: fsl,imx8mp-hdmi-pai
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +
>>> +  interrupts:
>>> +    maxItems: 1
>>> +
>>> +  power-domains:
>>> +    maxItems: 1
>>> +
>>> +  port:
>>> +    $ref: /schemas/graph.yaml#/properties/port
>>> +    description: Output to the HDMI TX controller.
>>> +    unevaluatedProperties: false
>>
>> Why do you need this line?
> 
> per my understanding, this line can be added or removed.

I'd choose to drop it :)

[...]

-- 
Regards,
Liu Ying