| Message ID | 20230403132503.62090-3-krzysztof.kozlowski@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | soundwire: qcom: add support for SM8550 (Soundwire v2.0.0) | expand |
On Mon, 03 Apr 2023 15:24:58 +0200, Krzysztof Kozlowski wrote: > The port sample interval was always 16-bit, split into low and high > bytes. This split was unnecessary, although harmless for older devices > because all of them used only lower byte (so values < 0xff). With > support for Soundwire controller on Qualcomm SM8550 and its devices, > both bytes will be used, thus add a new 'qcom,ports-sinterval' property > to allow 16-bit sample intervals. > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > --- > .../bindings/soundwire/qcom,soundwire.yaml | 22 +++++++++++++++++-- > 1 file changed, 20 insertions(+), 2 deletions(-) > Reviewed-by: Rob Herring <robh@kernel.org>
On 13/04/2023 13:12, Srinivas Kandagatla wrote: >>>> + qcom,ports-sinterval: >>>> + $ref: /schemas/types.yaml#/definitions/uint32-array >>> >>> Should this not be ref: /schemas/types.yaml#/definitions/uint16-array ? >> >> Same answer as for Rob: >> >> Because I am afraid it will grow in next version to 24 or 32 bits. I can >> change easily maximum, but if I put here uint16-array, all DTS will have >> /bytes 16/ annotation. >> > As per MiPi Specs the sample Interval is an integer in the range 2 to > 65535. I don't see a value in making this u32, other than adding some > confusion by deviating from specs. Hm, in such case I'll make it uint16. Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml b/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml index c283c594fb5c..883b8be9be1b 100644 --- a/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml +++ b/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml @@ -86,7 +86,7 @@ properties: qcom,ports-sinterval-low: $ref: /schemas/types.yaml#/definitions/uint8-array description: - Sample interval low of each data port. + Sample interval (only lowest byte) 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. @@ -94,6 +94,19 @@ properties: minItems: 3 maxItems: 16 + qcom,ports-sinterval: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Sample interval of each data port. + Out ports followed by In ports. Used for Sample Interval calculation. + Value of 0xffff indicates that this option is not implemented + or applicable for the respective data port. + More info in MIPI Alliance SoundWire 1.0 Specifications. + minItems: 3 + maxItems: 16 + items: + maximum: 0xffff + qcom,ports-offset1: $ref: /schemas/types.yaml#/definitions/uint8-array description: @@ -219,10 +232,15 @@ required: - '#size-cells' - qcom,dout-ports - qcom,din-ports - - qcom,ports-sinterval-low - qcom,ports-offset1 - qcom,ports-offset2 +oneOf: + - required: + - qcom,ports-sinterval-low + - required: + - qcom,ports-sinterval + additionalProperties: false examples:
The port sample interval was always 16-bit, split into low and high bytes. This split was unnecessary, although harmless for older devices because all of them used only lower byte (so values < 0xff). With support for Soundwire controller on Qualcomm SM8550 and its devices, both bytes will be used, thus add a new 'qcom,ports-sinterval' property to allow 16-bit sample intervals. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- .../bindings/soundwire/qcom,soundwire.yaml | 22 +++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-)