linux-kernel - Re: [PATCH 1/3] ASoC: dt-bindings: fsl,xcvr: Adjust the number of interrupts

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Date: Wed, 26 Jun 2024 11:34:50 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Shengjiu Wang <shengjiu.wang@...il.com>
Cc: Shengjiu Wang <shengjiu.wang@....com>, lgirdwood@...il.com,
 broonie@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, linux-sound@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
 festevam@...il.com, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] ASoC: dt-bindings: fsl,xcvr: Adjust the number of
 interrupts

On 26/06/2024 11:25, Shengjiu Wang wrote:
> On Wed, Jun 26, 2024 at 5:23 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>>
>> On 25/06/2024 06:56, Shengjiu Wang wrote:
>>> On i.MX8MP, there are 3 interrupts, the third interrupt is
>>> SPDIF wakeup interrupt from PHY
>>>
>>> Add ref: dai-common.yaml for #sound-dai-cells is needed and
>>> XCVR is a DAI device.
>>>
>>> Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
>>> ---
>>>  Documentation/devicetree/bindings/sound/fsl,xcvr.yaml | 6 ++++--
>>>  1 file changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/sound/fsl,xcvr.yaml b/Documentation/devicetree/bindings/sound/fsl,xcvr.yaml
>>> index 197ae8ba9c30..7470866e11c6 100644
>>> --- a/Documentation/devicetree/bindings/sound/fsl,xcvr.yaml
>>> +++ b/Documentation/devicetree/bindings/sound/fsl,xcvr.yaml
>>> @@ -42,6 +42,7 @@ properties:
>>>      items:
>>>        - description: WAKEUPMIX Audio XCVR Interrupt 1
>>>        - description: WAKEUPMIX Audio XCVR Interrupt 2
>>> +      - description: SPDIF wakeup interrupt from PHY
>>>      minItems: 1
>>>
>>>    clocks:
>>> @@ -88,6 +89,7 @@ required:
>>>    - dma-names
>>>
>>>  allOf:
>>> +  - $ref: dai-common.yaml#
>>>    - if:
>>>        properties:
>>>          compatible:
>>> @@ -112,7 +114,7 @@ allOf:
>>>      else:
>>>        properties:
>>>          interrupts:
>>> -          maxItems: 1
>>> +          maxItems: 3
>>
>> I have doubts this was tested. The existing example should fail,
>> although I did not see any reports. Not sure why.
> 
> it is tested, because the minItems is 1. so the example can pass
> 

That's a very unexpected change in dtschema. It indeed passes, but is
not correct. Why interrupts are flexible? This should be constrained.
Let's wait for Rob's confirmation that this is not a bug in dtschema.

Anyway, update example to be complete in next version.

Best regards,
Krzysztof