| Message ID | 1674114105-16651-2-git-send-email-quic_taozha@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2,1/9] dt-bindings: arm: Add support for DSB element | expand |
Hi Suzuki, 在 2/22/2023 2:11 AM, Suzuki K Poulose 写道: > On 19/01/2023 07:41, Tao Zhang wrote: >> Add property "qcom,dsb-elem-size" to support DSB(Discrete Single >> Bit) element for TPDA. Specifies the DSB element size supported >> by each monitor connected to the aggregator on each port. Should >> be specified in pairs (port, dsb element size). >> >> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> >> Signed-off-by: Tao Zhang <taozha@qti.qualcomm.com> >> --- >> .../bindings/arm/qcom,coresight-tpda.yaml | 22 >> ++++++++++++++++++++++ >> 1 file changed, 22 insertions(+) >> >> diff --git >> a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >> b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >> index 2ec9b5b..298db7f 100644 >> --- a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >> +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >> @@ -58,6 +58,26 @@ properties: >> minItems: 1 >> maxItems: 2 >> + qcom,dsb-element-size: >> + description: | >> + Specifies the DSB(Discrete Single Bit) element size supported by >> + each monitor connected to the aggregator on each port. Should be >> + specified in pairs <port, dsb element size>. > > Isn't this a property of the TPDM connected to the port ? i.e. the DSB > size ? Thus shouldn't this be part of the TPDM device (and the TPDA > will be able to find it from the TPDM device) ? > Since the port number is about the input port of TPDA, this property needs to be configured in the TPDA-related settings. In our current design, TPDM doesn't have a register to record the DSB size, and TPDA cannot actively know the TPDM DSB size from the TPDM device. > > Suzuki Best, Tao
On 27/02/2023 03:07, Tao Zhang wrote: > Hi Suzuki, > > 在 2/22/2023 2:11 AM, Suzuki K Poulose 写道: >> On 19/01/2023 07:41, Tao Zhang wrote: >>> Add property "qcom,dsb-elem-size" to support DSB(Discrete Single >>> Bit) element for TPDA. Specifies the DSB element size supported >>> by each monitor connected to the aggregator on each port. Should >>> be specified in pairs (port, dsb element size). >>> >>> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> >>> Signed-off-by: Tao Zhang <taozha@qti.qualcomm.com> >>> --- >>> .../bindings/arm/qcom,coresight-tpda.yaml | 22 >>> ++++++++++++++++++++++ >>> 1 file changed, 22 insertions(+) >>> >>> diff --git >>> a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >>> b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >>> index 2ec9b5b..298db7f 100644 >>> --- a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >>> +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml >>> @@ -58,6 +58,26 @@ properties: >>> minItems: 1 >>> maxItems: 2 >>> + qcom,dsb-element-size: >>> + description: | >>> + Specifies the DSB(Discrete Single Bit) element size supported by >>> + each monitor connected to the aggregator on each port. Should be >>> + specified in pairs <port, dsb element size>. >> >> Isn't this a property of the TPDM connected to the port ? i.e. the DSB >> size ? Thus shouldn't this be part of the TPDM device (and the TPDA >> will be able to find it from the TPDM device) ? >> > Since the port number is about the input port of TPDA, this property > needs to be configured in the TPDA-related settings. That is because, you chose to describe the property of TPDM in TPDA ? Instead if you do it as follows : tpdm { qcom,tpdm-dsb-elemenet-size = <32> out_ports { port { remote-endpoint=<&tpda_port_number>; } } tpda { in_ports { port { remote-endpoint=<&tpdm0_port0>; } } } The TPDA driver can figure out the "port" that a given TPDM is connected to and thus find out the DSB size. For the tpda driver, pdata->conns could hold the reference to the TPDM device and thus fetch the DSB size. (Note: James is working on a patch to add input port connections to the platform data). Suzuki
diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml index 2ec9b5b..298db7f 100644 --- a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml @@ -58,6 +58,26 @@ properties: minItems: 1 maxItems: 2 + qcom,dsb-element-size: + description: | + Specifies the DSB(Discrete Single Bit) element size supported by + each monitor connected to the aggregator on each port. Should be + specified in pairs <port, dsb element size>. + + Note: The maximum value of the port number depends on how many + input ports the current TPDA has. DSB element size currently only + supports 32-bit and 64-bit. + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + items: + - description: | + "port" indicates TPDA input port number + minimum: 0 + - description: | + "dsb element size" indicates dsb element size + minimum: 0 + maximum: 64 + clocks: maxItems: 1 @@ -100,6 +120,8 @@ examples: compatible = "qcom,coresight-tpda", "arm,primecell"; reg = <0x6004000 0x1000>; + qcom,dsb-element-size = <0 32>; + clocks = <&aoss_qmp>; clock-names = "apb_pclk";