linux-kernel - [PATCH v1 0/8] Add cmb dataset support for TPDM

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Message-ID: <20230329084744.5705-1-quic_jinlmao@quicinc.com>
Date:   Wed, 29 Mar 2023 01:47:36 -0700
From:   Mao Jinlong <quic_jinlmao@...cinc.com>
To:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     Mao Jinlong <quic_jinlmao@...cinc.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <coresight@...ts.linaro.org>,
        <devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Tao Zhang <quic_taozha@...cinc.com>,
        Hao Zhang <quic_hazha@...cinc.com>
Subject: [PATCH v1 0/8] Add cmb dataset support for TPDM 

Continuous multi-bit (CMB) is responsible for collection of CMB data sets.
It monitors a bus of related signals (eg, a counter value) and an associated valid signal.

This patch series adds support to config of CMB registers.
Element Creation:
  CMB_CR.mode : Continuous mode or Trace on Change mode(cmb_mode)

Pattern Match Output (usually to CTI):
  CMB_XPR : Trigger pattern register value(cmb_trig_patt_val)
  CMB_XPMR : Trigger pattern mask register value(cmb_trig_patt_mask)

Timestamp Request Based on Input Pattern Match:
  CMB_TPR : Timestamp pattern register value(cmb_patt_val)
  CMB_TPMR : Timestamp pattern mask register value(cmb_patt_mask)
  CMB_TIER.patt_tsenab : Timestamps are requested upon CMB interface pattern match via
                         setting this bit to 1(cmb_patt_ts)

Timestamp Request Based on Input (usually from CTI):
  CMB_TIER.xtrig_tsenab : Timestamps are requested upon CMB cross trigger interface
                          timestamp request via setting this bit to 1(cmb_trig_ts)

Mux Select Registers:
  CMB_MSR : Configure Mux select registers(cmb_msr)

Once this series patches are applied properly, the new tpdm nodes should be observed at the tpdm path.
e.g.
/sys/devices/platform/soc@...0c29000.tpdm/tpdm1 # ls -l | grep cmb

-rw-r--r--    1 root     0             4096 Jan  1 00:00 cmb_mode
-rw-r--r--    1 root     0             4096 Jan  1 00:00 cmb_msr
-rw-r--r--    1 root     0             4096 Jan  1 00:00 cmb_patt_mask
-rw-r--r--    1 root     0             4096 Jan  1 00:00 cmb_patt_ts
-rw-r--r--    1 root     0             4096 Jan  1 00:22 cmb_patt_val
-rw-r--r--    1 root     0             4096 Jan  1 00:59 cmb_trig_patt_mask
-rw-r--r--    1 root     0             4096 Jan  1 00:57 cmb_trig_patt_val
-rw-r--r--    1 root     0             4096 Jan  1 00:00 cmb_trig_ts
-rw-r--r--    1 root     0             4096 Jan  1 00:58 cmb_ts_all

This patch series depends on:
[v3,0/11] Add support to configure TPDM DSB subunit
https://patchwork.kernel.org/project/linux-arm-kernel/cover/1679551448-19160-1-git-send-email-quic_taozha@quicinc.com/

Codelinaro link:
https://git.codelinaro.org/clo/linux-kernel/coresight/-/commits/tpdm-cmb-v1

Mao Jinlong (8):
  coresight-tpdm: Add CMB dataset support
  coresight-tpdm: Add support to configure CMB collection mode
  coresight-tpdm: Add pattern registers support for CMB data set
  coresight-tpdm: Add timestamp control register support for the CMB
  coresight-tpdm: Add msr register support for CMB
  dt-bindings: arm: Add support for TPDM CMB MSR register
  coresight-tpda: Add support to configure CMB element size
  dt-bindings: arm: Add support for TPDM CMB element size

 .../testing/sysfs-bus-coresight-devices-tpdm  |  63 +++
 .../bindings/arm/qcom,coresight-tpdm.yaml     |  26 +
 drivers/hwtracing/coresight/coresight-tpda.c  |  33 +-
 drivers/hwtracing/coresight/coresight-tpda.h  |   4 +
 drivers/hwtracing/coresight/coresight-tpdm.c  | 447 +++++++++++++++++-
 drivers/hwtracing/coresight/coresight-tpdm.h  |  60 +++
 6 files changed, 626 insertions(+), 7 deletions(-)

-- 
2.39.0