Messages in this thread | | | Date | Mon, 21 Nov 2022 10:21:38 +0000 | Subject | Re: [PATCH v1 0/9] Add support to configure TPDM DSB subunit | From | Suzuki Kuruppassery Poulose <> |
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On 21/11/2022 08:21, Tao Zhang wrote: > Introduction of TPDM DSB subunit > DSB subunit is responsible for creating a dataset element, and is also > optionally responsible for packing it to fit multiple elements on a > single ATB transfer if possible in the configuration. The TPDM Core > Datapath requests timestamps be stored by the TPDA and then delivering > ATB sized data (depending on ATB width and element size, this could > be smaller or larger than a dataset element) to the ATB Mast FSM. > > The DSB subunit must be configured prior to enablement. This series > adds support for TPDM to configure the configure DSB subunit. > > Once this series patches are applied properly, the new tpdm nodes for > should be observed at the tpdm path /sys/bus/coresight/devices/tpdm* > which supports DSB subunit. > e.g. > /sys/devices/platform/soc@0/69d0000.tpdm/tpdm0#ls -l | grep dsb > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_edge_ctrl > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_edge_ctrl_mask > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_mode > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_mask > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_ts > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_type > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_patt_val > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_patt_mask > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_patt_val > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_ts > -rw-r--r-- 1 root root 4096 Jan 1 00:01 dsb_trig_type > > We can use the commands are similar to the below to configure the > TPDMs which support DSB subunit. Enable coresight sink first. > echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink > echo 1 > /sys/bus/coresight/devices/tpdm0/reset > echo 0x3 0x3 0x1 > /sys/bus/coresight/devices/tpdm0/dsb_edge_ctrl_mask > echo 0x6d 0x6d 0 > /sys/bus/coresight/devices/tpdm0/dsb_edge_ctrl > echo 1 > /sys/bus/coresight/devices/tpdm0/dsb_patt_ts > echo 1 > /sys/bus/coresight/devices/tpdm0/dsb_patt_type > echo 0 > /sys/bus/coresight/devices/tpdm0/dsb_trig_ts > echo 0 0xFFFFFFFF > /sys/bus/coresight/devices/tpdm0/dsb_patt_mask > echo 0 0xFFFFFFFF > /sys/bus/coresight/devices/tpdm0/dsb_trig_patt_val > > This series applies to coresight/next > https://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git?h=next
Does it ?
> This patch series depends on patch series "[v12,0/9] Coresight: Add > support for TPDM and TPDA" > https://patchwork.kernel.org/project/linux-arm-kernel/cover/20221114144027.14365-1-quic_jinlmao@quicinc.com/ >
And the CoreSight Dynamice Trace ID series too.
Change log please
Suzuki
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