Date:   Thu, 20 Oct 2022 15:44:29 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <vkoul@...nel.org>, <agross@...nel.org>, <andersson@...nel.org>,
        <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
        <quic_plai@...cinc.com>, <bgoswami@...cinc.com>, <perex@...ex.cz>,
        <tiwai@...e.com>, <srinivas.kandagatla@...aro.org>,
        <quic_rohkumar@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <swboyd@...omium.org>,
        <judyhsiao@...omium.org>
CC:     Ratna Deepthi Kudaravalli <quic_rkudarav@...cinc.com>
Subject: Re: [PATCH v2] dt-bindings: soundwire: Convert text file to yaml
 format


On 10/19/2022 7:35 AM, Krzysztof Kozlowski wrote:
Thanks for Your Time Krzysztof!!!
> On 18/10/2022 07:24, Srinivasa Rao Mandadapu wrote:
>> Update soundwire bindings with yaml formats.
> The commit title and body are not really accurate. YAML is just format,
> you convert the bindings to DT schema.
Okay Will change accordingly.
>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>> Co-developed-by: Ratna Deepthi Kudaravalli <quic_rkudarav@...cinc.com>
>> Signed-off-by: Ratna Deepthi Kudaravalli <quic_rkudarav@...cinc.com>
> Please use scripts/get_maintainers.pl to get a list of necessary people
> and lists to CC.  It might happen, that command when run on an older
> kernel, gives you outdated entries.  Therefore please be sure you base
> your patches on recent Linux kernel.
Okay. will get new maintainers list and send accordingly.
>
>
>> ---
>>
>> This patch depends on:
>>      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=42801e6185290d63691bd39cf8a3bba6cd5fe520
>>
>> Changes since V1:
>>    -- Remove the status field in example.
>>    -- Remove interrupt-names property in the required list.
>>    -- Add the wakeup-source property.	
>>   
>>   .../devicetree/bindings/soundwire/qcom,sdw.txt     | 214 ---------------------
>>   .../devicetree/bindings/soundwire/qcom,sdw.yaml    | 186 ++++++++++++++++++
>>   2 files changed, 186 insertions(+), 214 deletions(-)
>>   delete mode 100644 Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
>>   create mode 100644 Documentation/devicetree/bindings/soundwire/qcom,sdw.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
>> deleted file mode 100644
>> index c85c257..0000000
>> --- a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
>> +++ /dev/null
>> @@ -1,214 +0,0 @@
>> -Qualcomm SoundWire Controller Bindings
>> -
>> -
>> -This binding describes the Qualcomm SoundWire Controller along with its
>> -board specific bus parameters.
>> -
>> -- compatible:
>> -	Usage: required
>> -	Value type: <stringlist>
>> -	Definition: must be "qcom,soundwire-v<MAJOR>.<MINOR>.<STEP>",
>> -		    Example:
>> -			"qcom,soundwire-v1.3.0"
>> -			"qcom,soundwire-v1.5.0"
>> -			"qcom,soundwire-v1.5.1"
>> -			"qcom,soundwire-v1.6.0"
>> -- reg:
>> -	Usage: required
>> -	Value type: <prop-encoded-array>
>> -	Definition: the base address and size of SoundWire controller
>> -		    address space.
>> -
>> -- interrupts:
>> -	Usage: required
>> -	Value type: <prop-encoded-array>
>> -	Definition: should specify the SoundWire Controller core and optional
>> -		    wake IRQ
>> -
>> -- interrupt-names:
>> -	Usage: Optional
>> -	Value type: boolean
>> -	Value type: <stringlist>
>> -	Definition: should be "core" for core and "wakeup" for wake interrupt.
>> -
>> -- wakeup-source:
>> -	Usage: Optional
>> -	Value type: boolean
>> -	Definition: should specify if SoundWire Controller is wake up capable.
>> -
>> -- clock-names:
>> -	Usage: required
>> -	Value type: <stringlist>
>> -	Definition: should be "iface" for SoundWire Controller interface clock
>> -
>> -- clocks:
>> -	Usage: required
>> -	Value type: <prop-encoded-array>
>> -	Definition: should specify the SoundWire Controller interface clock
>> -
>> -- #sound-dai-cells:
>> -	Usage: required
>> -	Value type: <u32>
>> -	Definition: must be 1 for digital audio interfaces on the controller.
>> -
>> -- qcom,dout-ports:
>> -	Usage: required
>> -	Value type: <u32>
>> -	Definition: must be count of data out ports
>> -
>> -- qcom,din-ports:
>> -	Usage: required
>> -	Value type: <u32>
>> -	Definition: must be count of data in ports
>> -
>> -- qcom,ports-offset1:
>> -	Usage: required
>> -	Value type: <prop-encoded-array>
>> -	Definition: should specify payload transport window offset1 of each
>> -		    data port. Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-offset2:
>> -	Usage: required
>> -	Value type: <prop-encoded-array>
>> -	Definition: should specify payload transport window offset2 of each
>> -		    data port. Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-sinterval-low:
>> -	Usage: required
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be sample interval low of each data port.
>> -		    Out ports followed by In ports. Used for Sample Interval
>> -		    calculation.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-word-length:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be size of payload channel sample.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-block-pack-mode:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be 0 or 1 to indicate the block packing mode.
>> -		    0 to indicate Blocks are per Channel
>> -		    1 to indicate Blocks are per Port.
>> -		    Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-block-group-count:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be in range 1 to 4 to indicate how many sample
>> -		    intervals are combined into a payload.
>> -		    Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-lane-control:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be in range 0 to 7 to identify which	data lane
>> -		    the data port uses.
>> -		    Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-hstart:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be number identifying lowerst numbered coloum in
>> -		    SoundWire Frame, i.e. left edge of the Transport sub-frame
>> -		    for each port. Values between 0 and 15 are valid.
>> -		    Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,ports-hstop:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be number identifying highest numbered coloum in
>> -		    SoundWire Frame, i.e. the right edge of the Transport
>> -		    sub-frame for each port. Values between 0 and 15 are valid.
>> -		    Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- qcom,dports-type:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: should be one of the following types
>> -		    0 for reduced port
>> -		    1 for simple ports
>> -		    2 for full port
>> -		    Out ports followed by In ports.
>> -		    Value of 0xFF indicates that this option is not implemented
>> -		    or applicable for the respective data port.
>> -		    More info in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -- reset:
>> -	Usage: optional
>> -	Value type: <prop-encoded-array>
>> -	Definition: Should specify the SoundWire audio CSR reset controller interface,
>> -		    which is required for SoundWire version 1.6.0 and above.
>> -
>> -- reset-names:
>> -	Usage: optional
>> -	Value type: <stringlist>
>> -	Definition: should be "swr_audio_cgcr" for SoundWire audio CSR reset
>> -		    controller interface.
>> -
>> -Note:
>> -	More Information on detail of encoding of these fields can be
>> -found in MIPI Alliance SoundWire 1.0 Specifications.
>> -
>> -= SoundWire devices
>> -Each subnode of the bus represents SoundWire device attached to it.
>> -The properties of these nodes are defined by the individual bindings.
>> -
>> -= EXAMPLE
>> -The following example represents a SoundWire controller on DB845c board
>> -which has controller integrated inside WCD934x codec on SDM845 SoC.
>> -
>> -soundwire: soundwire@c85 {
>> -	compatible = "qcom,soundwire-v1.3.0";
>> -	reg = <0xc85 0x20>;
>> -	interrupts = <20 IRQ_TYPE_EDGE_RISING>;
>> -	clocks = <&wcc>;
>> -	clock-names = "iface";
>> -	resets = <&lpass_audiocc LPASS_AUDIO_SWR_TX_CGCR>;
>> -	reset-names = "swr_audio_cgcr";
>> -	#sound-dai-cells = <1>;
>> -	qcom,dports-type = <0>;
>> -	qcom,dout-ports	= <6>;
>> -	qcom,din-ports	= <2>;
>> -	qcom,ports-sinterval-low = /bits/ 8  <0x07 0x1F 0x3F 0x7 0x1F 0x3F 0x0F 0x0F>;
>> -	qcom,ports-offset1 = /bits/ 8 <0x01 0x02 0x0C 0x6 0x12 0x0D 0x07 0x0A >;
>> -	qcom,ports-offset2 = /bits/ 8 <0x00 0x00 0x1F 0x00 0x00 0x1F 0x00 0x00>;
>> -
>> -	/* Left Speaker */
>> -	left{
>> -		....
>> -	};
>> -
>> -	/* Right Speaker */
>> -	right{
>> -		....
>> -	};
>> -};
>> diff --git a/Documentation/devicetree/bindings/soundwire/qcom,sdw.yaml b/Documentation/devicetree/bindings/soundwire/qcom,sdw.yaml
>> new file mode 100644
>> index 0000000..65bff91
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/soundwire/qcom,sdw.yaml
> Filename based on compatible, so "qcom,soundwire.yaml"
Okay.
>
>> @@ -0,0 +1,186 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/soundwire/qcom,sdw.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm SoundWire Controller
>> +
>> +maintainers:
>> +  - Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> +  - Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>> +
>> +description:
>> +  This binding describes the Qualcomm SoundWire controller along with its
>> +  board specific bus parameters.
> Drop "This binding describes"
Okay.
>
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - qcom,soundwire-v1.3.0
>> +      - qcom,soundwire-v1.5.0
>> +      - qcom,soundwire-v1.5.1
>> +      - qcom,soundwire-v1.6.0
>> +
>> +  reg:
>> +    items:
>> +      - description: the base address and size of SoundWire controller
>> +                   address space.
> Just maxItems: 1
Okay.
>
>> +
>> +  interrupts:
>> +    items:
>> +      - description: specify the SoundWire controller core and optional
>> +                   wake IRQ.
> If there is optional IRQ then this is not correct. You need here two items.
>
> The original bindings could be here not precise or not correct, so fix
> them while converting and document the changes in commit msg.
Okay. will modify accordingly.
>
>> +
>> +  interrupt-names:
>> +    items:
>> +      - const: wakeup
> Where is the core?
Will add it.
>
>> +
>> +  clocks:
>> +    items:
>> +      - description: iface clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: iface
>> +
>> +  resets:
>> +    items:
>> +      - description: SWR_AUDIO_CGCR RESET
>> +
>> +  reset-names:
>> +    items:
>> +      - const: swr_audio_cgcr
>> +
>> +  '#sound-dai-cells':
>> +    const: 1
>> +
>> +  '#address-cells':
>> +    const: 2
>> +
>> +  '#size-cells':
>> +    const: 0
> Why? Old binding did not have them, I think. You do not have any children...
There are child nodes of slave codec devices. Will update bindings and 
example accordingly.
>
>> +
>> +  wakeup-source:
>> +    description: specify the Soundwire Controller is wakeup Capable.
>> +    type: boolean
> Just:
> wakeup-source: true
Okay.
>
>> +
>> +  qcom,din-ports:
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    description: count of data in ports
>> +
>> +  qcom,dout-ports:
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    description: count of data out ports
>> +
>> +  qcom,ports-word-length:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: size of payload channel sample.
>> +    minItems: 5
> Drop minItems
Okay.
>
>> +    maxItems: 5
>> +
>> +  qcom,ports-sinterval-low:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: sample interval low of each data port.
>> +    minItems: 5
>
> here and in other places as well
Okay.
>
>> +    maxItems: 5
>> +
>> +  qcom,ports-offset1:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: payload transport window offset1 of each data port.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +  qcom,ports-offset2:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: payload transport window offset2 of each data port.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +  qcom,ports-lane-control:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: identify which data lane the data port uses.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +  qcom,ports-block-pack-mode:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: indicate the block packing mode.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +  qcom,ports-hstart:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: identifying lowerst numbered coloum in SoundWire frame.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +  qcom,ports-hstop:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: identifying highest numbered coloum in SoundWire frame.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +  qcom,ports-block-group-count:
>> +    $ref: /schemas/types.yaml#/definitions/uint8-array
>> +    description: indicate how many sample intervals are combined into a payload.
>> +    minItems: 5
>> +    maxItems: 5
>> +
>> +required:
>> +  - reg
>> +  - interrupts
>> +  - clocks
>> +  - clock-names
>> +  - resets
>> +  - reset-names
>> +  - '#sound-dai-cells'
>> +  - '#address-cells'
>> +  - '#size-cells'
>> +  - qcom,dout-ports
>> +  - qcom,din-ports
>> +  - qcom,ports-word-length
>> +  - qcom,ports-sinterval-low
>> +  - qcom,ports-offset1
>> +  - qcom,ports-offset2
>> +  - qcom,ports-lane-control
>> +  - qcom,ports-block-pack-mode
>> +  - qcom,ports-hstart
>> +  - qcom,ports-block-group-count
> These properties were optional. You need to explain any differences
> against pure-conversion.
Okay. Will modify as per base file.
>
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    #include <dt-bindings/interrupt-controller/irq.h>
>> +    #include <dt-bindings/clock/qcom,lpassaudiocc-sc7280.h>
>> +
>> +    soundwire@...0000 {
>> +        compatible = "qcom,soundwire-v1.6.0";
>> +        reg = <0x03210000 0x2000>;
>> +
>> +        interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
>> +        clocks = <&lpass_rx_macro>;
>> +        clock-names = "iface";
>> +
>> +        qcom,din-ports = <0>;
>> +        qcom,dout-ports = <5>;
>> +
>> +        resets = <&lpass_audiocc LPASS_AUDIO_SWR_RX_CGCR>;
>> +        reset-names = "swr_audio_cgcr";
>> +
>> +        qcom,ports-word-length =        /bits/ 8 <0x01 0x07 0x04 0xff 0xff>;
>> +        qcom,ports-sinterval-low =      /bits/ 8 <0x03 0x3f 0x1f 0x03 0x03>;
>> +        qcom,ports-offset1 =            /bits/ 8 <0x00 0x00 0x0b 0x01 0x01>;
>> +        qcom,ports-offset2 =            /bits/ 8 <0x00 0x00 0x0b 0x00 0x00>;
>> +        qcom,ports-lane-control =       /bits/ 8 <0x01 0x00 0x00 0x00 0x00>;
>> +        qcom,ports-block-pack-mode =    /bits/ 8 <0xff 0x00 0x01 0xff 0xff>;
>> +        qcom,ports-hstart =             /bits/ 8 <0xff 0x03 0xff 0xff 0xff>;
>> +        qcom,ports-hstop =              /bits/ 8 <0xff 0x06 0xff 0xff 0xff>;
>> +        qcom,ports-block-group-count =  /bits/ 8 <0xff 0xff 0xff 0xff 0x00>;
>> +
>> +        #sound-dai-cells = <1>;
>> +        #address-cells = <2>;
>> +        #size-cells = <0>;
> Where are the children?
Will add it.
>
>> +    };
> Best regards,
> Krzysztof
>

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