linux-kernel - Re: [PATCH 10/10] ARM: dts: msm: Add TPDA and TPDM support to DTS for RB5

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Date:   Fri, 5 Nov 2021 16:07:31 +0800
From:   Jinlong <quic_jinlmao@...cinc.com>
To:     Suzuki K Poulose <suzuki.poulose@....com>
CC:     Tao Zhang <quic_taozha@...cinc.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <coresight@...ts.linaro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>
Subject: Re: [PATCH 10/10] ARM: dts: msm: Add TPDA and TPDM support to DTS
 for RB5

Thanks for the review, Suzuki.  

On Thu, Nov 04, 2021 at 09:45:08AM +0000, Suzuki K Poulose wrote:
> On 21/10/2021 08:38, Tao Zhang wrote:
> > Add TPDA and TPDM support to DTS for RB5 board. This change is a
> > sample for validating. After applying this patch, the new TPDM and
> > TPDA nodes can be observed at the coresight devices path. TPDM and
> > TPDA hardware can be operated by commands.
> > 
> > List the commands for validating this series patches as below.
> > echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> > echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
> > echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
> > echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
> > cat /dev/tmc_etf0 > /data/etf-tpdm0.bin
> > echo 0 > /sys/bus/coresight/devices/tpdm0/enable_source
> > echo 0 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> > echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> > echo 1 > /sys/bus/coresight/devices/tpdm1/enable_source
> > echo 1 > /sys/bus/coresight/devices/tpdm1/integration_test
> > echo 2 > /sys/bus/coresight/devices/tpdm1/integration_test
> > cat /dev/tmc_etf0 > /data/etf-tpdm1.bin
> > echo 0 > /sys/bus/coresight/devices/tpdm1/enable_source
> > echo 0 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> > echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> > echo 1 > /sys/bus/coresight/devices/tpdm2/enable_source
> > echo 1 > /sys/bus/coresight/devices/tpdm2/integration_test
> > echo 2 > /sys/bus/coresight/devices/tpdm2/integration_test
> > cat /dev/tmc_etf0 > /data/etf-tpdm2.bin
> > echo 0 > /sys/bus/coresight/devices/tpdm2/enable_source
> > echo 0 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
> > 
> 
> 
> 
> > If the data from TPDMs can be obtained from the ETF, it means
> > that the TPDMs verification is successful. At the same time,
> 
> 
> How can we decode the TPDM trace ? Is there a public decoder
> available ?
> 

There is an internal tool on PC host to parse the TPDM trace. 

> > since TPDM0, TPDM1 and TPDM2 are all connected to the same
> > funnel "funnel@...d000" and output via different output ports,
> > it also means that the following patches verification is
> > successful.
> > coresight: add support to enable more coresight paths
> > coresight: funnel: add support for multiple output ports
> > 
> > Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
> > ---
> >   arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 439 +++++++++++++++++++++++
> >   1 file changed, 439 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
> > index 8ac96f8e79d4..bcec8b181e11 100644
> > --- a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
> > +++ b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
> > @@ -222,6 +222,445 @@
> 
> 
> > +
> > +	funnel@...4000 {
> > +		compatible = "arm,coresight-dynamic-funnel", "arm,primecell";
> > +		arm,primecell-periphid = <0x000bb908>;
> > +
> > +		reg = <0 0x6b04000 0 0x1000>;
> > +		reg-names = "funnel-base";
> > +
> > +		clocks = <&aoss_qmp>;
> > +		clock-names = "apb_pclk";
> > +
> > +		out-ports {
> > +			port {
> > +				merge_funnel_out: endpoint {
> > +					remote-endpoint =
> > +						<&etf_in>;
> > +				};
> > +			};
> > +		};
> > +
> > +		in-ports {
> > +			#address-cells = <1>;
> > +			#size-cells = <0>;
> > +
> > +			port@7 {
> > +				reg = <7>;
> > +				swao_funnel_in7: endpoint {
> 
> > +					slave-mode;
> 
> This is obsolete, with the new in-ports/out-ports construct.
> 

We will check and update.

> Suzuki