linux-kernel - Re: [PATCH v4 0/3] coresight: Add static trace id support

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Message-ID: <0b4c9c9f-02c9-45b5-b289-046ce4785325@quicinc.com>
Date: Wed, 21 Aug 2024 16:22:40 +0800
From: Jinlong Mao <quic_jinlmao@...cinc.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach
	<mike.leach@...aro.org>, James Clark <james.clark@....com>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Alexander Shishkin
	<alexander.shishkin@...ux.intel.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v4 0/3] coresight: Add static trace id support

On 2024/7/29 15:14, Mao Jinlong wrote:
> Some HW has static trace id which cannot be changed via
> software programming. For this case, configure the trace id
> in device tree with "arm,static-trace-id = <xxx>", and
> call coresight_trace_id_get_static_system_id with the trace id value
> in device probe function. The id will be reserved for the HW
> all the time if the device is probed.
> 
> Changes since V3:
> 1. Adda new API function
> int coresight_trace_id_get_system_static_id(int trace_id).
> 2. Use the term "static trace id" for these devices where
> the hardware sets a non-programmable trace ID.
> 
> Changes since V2:
> 1. Change "trace-id" to "arm,trace-id".
> 2. Add trace id flag for getting preferred id or ODD id.
> 
> Changes since V1:
> 1. Add argument to coresight_trace_id_get_system_id for preferred id
> instead of adding new function coresight_trace_id_reserve_system_id.
> 2. Add constraint to trace-id in dt-binding file.
> 
> Mao Jinlong (3):
>    dt-bindings: arm: Add arm,trace-id for coresight dummy source
>    coresight: Add support to get static id for system trace sources
>    coresight: dummy: Add static trace id support for dummy source
> 
>   .../sysfs-bus-coresight-devices-dummy-source  | 15 +++++
>   .../arm/arm,coresight-dummy-source.yaml       |  6 ++
>   drivers/hwtracing/coresight/coresight-dummy.c | 59 +++++++++++++++++--
>   .../hwtracing/coresight/coresight-platform.c  | 26 ++++++++
>   .../hwtracing/coresight/coresight-trace-id.c  | 38 ++++++++----
>   .../hwtracing/coresight/coresight-trace-id.h  |  9 +++
>   include/linux/coresight.h                     |  1 +
>   7 files changed, 140 insertions(+), 14 deletions(-)
>   create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source

Hi Reviewers,

Gentle remainder for the review.

Thanks
Jinlong Mao

>