linux-kernel - Re: [RFC PATCH 5/6] dt-bindings: soundwire: add bindings for Qcom controller

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Date:   Mon, 10 Jun 2019 09:14:38 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     broonie@...nel.org, robh+dt@...nel.org, devicetree@...r.kernel.org,
        mark.rutland@....com, pierre-louis.bossart@...ux.intel.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 5/6] dt-bindings: soundwire: add bindings for Qcom
 controller



On 10/06/2019 05:51, Vinod Koul wrote:
> On 07-06-19, 09:56, Srinivas Kandagatla wrote:
>> This patch adds bindings for Qualcomm soundwire controller.
>>
>> Qualcomm SoundWire Master controller is present in most Qualcomm SoCs
>> either integrated as part of WCD audio codecs via slimbus or
>> as part of SOC I/O.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> ---
>>   .../bindings/soundwire/qcom,swr.txt           | 62 +++++++++++++++++++
> 
> So I was expecting to see bus support patches for OF first. I think you
> have missed those changes. Please do include those in v2 with bindings
> and OF support for bus.

I was planning to post bus bindings along with soundwire slave bindings 
of WSA881x driver!
I will be sending this soon!

> 
>>   1 file changed, 62 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/soundwire/qcom,swr.txt
>>
>> diff --git a/Documentation/devicetree/bindings/soundwire/qcom,swr.txt b/Documentation/devicetree/bindings/soundwire/qcom,swr.txt
>> new file mode 100644
>> index 000000000000..eb84d0f4f36f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/soundwire/qcom,swr.txt
>> @@ -0,0 +1,62 @@
>> +Qualcomm SoundWire Controller
>> +
>> +This binding describes the Qualcomm SoundWire Controller Bindings.
>> +
>> +Required properties:
>> +
>> +- compatible:		Must be "qcom,soundwire-v<MAJOR>.<MINOR>.<STEP>",
>> +	 		example:
>> +			"qcom,soundwire-v1.3.0"
>> +			"qcom,soundwire-v1.5.0"
>> +			"qcom,soundwire-v1.6.0"
>> +- reg:			SoundWire controller address space.
>> +- interrupts:		SoundWire controller interrupt.
>> +- clock-names:		Must contain "iface".
>> +- clocks:		Interface clocks needed for controller.
>> +- #sound-dai-cells:	Must be 1 for digital audio interfaces on the controllers.
>> +- #address-cells:	Must be 1 for SoundWire devices;
>> +- #size-cells:		Must be <0> as SoundWire addresses have no size component.
>> +- qcom,dout-ports: 	Must be count of data out ports
>> +- qcom,din-ports: 	Must be count of data in ports
> 
> On these I think we should have specified dpn properties as specified in
> DisCo, but then looking at spec we do not define that for master, but
> bus seems to have it.
> 
> Pierre do you why master does not have dpn properties in DisCo?
> 
>> +- qcom,ports-offset1:	Must be frame offset1 of each data port.
>> +			Out followed by In. Used for Block size calculation.
>> +- qcom,ports-offset2: 	Must be frame offset2 of each data port.
>> +			Out followed by In. Used for Block size calculation.
>> +- qcom,ports-sinterval-low: Must be sample interval low of each data port.
>> +			Out followed by In. Used for Sample Interval calculation.
> 
> These are software so do not belong here
These are board-specfic properties w.r.t this controller ports 
configuration.
I don't see any other option to specify this?
Do you have any alternative suggestions?

--srini
>