Re: [PATCH v1] arm64: dts: qcom: purwa-iot-evk: add missing DP2 audio link

[Srinivas Kandagatla]

On 10/29/26 3:27 AM, Le Qi wrote:
> On 10/20/2026 6:14 PM, Konrad Dybcio wrote:
>> On 10/9/26 5:04 AM, Le Qi wrote:
>>> The DP2 DAI link is missing from the sound card definition, preventing
>>> audio playback over the third DisplayPort interface.
>>>
>>> Add the required codec, CPU, and platform DAI configuration to enable
>>> audio playback over DP2.
>>>
>>> Signed-off-by: Le Qi<le.qi@xxxxxxxxxxxxxxxx>
>>> ---
>>>   arch/arm64/boot/dts/qcom/purwa-iot-evk.dts | 16 ++++++++++++++++
>>>   1 file changed, 16 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts b/arch/arm64/
>>> boot/dts/qcom/purwa-iot-evk.dts
>>> index a811d8ca2dbf..93cefffd1f46 100644
>>> --- a/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
>>> +++ b/arch/arm64/boot/dts/qcom/purwa-iot-evk.dts
>>> @@ -641,6 +641,22 @@ platform {
>>>                   sound-dai = <&q6apm>;
>>>               };
>>>           };
>>> +
>>> +        dp2-dai-link {
>>> +            link-name = "DP2 Playback";
>>> +
>>> +            codec {
>>> +                sound-dai = <&mdss_dp2>;
>>> +            };
>>> +
>>> +            cpu {
>>> +                sound-dai = <&q6apmbedai DISPLAY_PORT_RX_2>;
>>> +            };
>>> +
>>> +            platform {
>>> +                sound-dai = <&q6apm>;
>>> +            };
>>> +        };
>> Srini, can/should this be in the SoC DT?
probably not,
1. because the dai-links do not have explicit disabled status, so these
get parsed
2. sound card itself is board specific.

--srini
>>
>> Konrad
> 
> Hi Konrad,
> 
> I think it is better to keep this in the board DT, since the sound card
> is board-specific. DP0 and DP1 DAI links are already defined here, so
> DP2 should be added alongside them.
> 
> Srini has also agreed to adding DP2 support in the audio topology.
> 
> Thanks,
>