linux-kernel - Re: [PATCH v3 0/3] add sysfs nodes to configure TPDA's registers

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Message-ID: <99de75a9-cb2d-48e0-8a8a-c8345fbdf989@oss.qualcomm.com>
Date: Mon, 13 Oct 2025 16:25:07 +0800
From: Jie Gan <jie.gan@....qualcomm.com>
To: James Clark <james.clark@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Mike Leach <mike.leach@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Tingwei Zhang <tingwei.zhang@....qualcomm.com>
Subject: Re: [PATCH v3 0/3] add sysfs nodes to configure TPDA's registers



On 9/15/2025 10:12 AM, Jie Gan wrote:
> 
> 
> On 8/27/2025 7:59 PM, James Clark wrote:
>>
>>
>> On 27/08/2025 11:55 am, Jie Gan wrote:
>>> Patchset 1 introduces configuration of the cross-trigger registers with
>>> appropriate values to enable proper generation of cross-trigger packets.
>>>
>>> Patchset 2 introduces a logic to configure the TPDA_SYNCR register,
>>> which determines the frequency of ASYNC packet generation. These packets
>>> assist userspace tools in accurately identifying each valid packet.
>>>
>>> Patchset 3 introduces a sysfs node to initiate a flush request for the
>>> specific port, forcing the data to synchronize and be transmitted to the
>>> sink device.
>>>
>>> Changes in V3:
>>> 1. Optimizing codes according to James's comment.
>>> Link to V2 - https://lore.kernel.org/all/20250827042042.6786-1- 
>>> jie.gan@....qualcomm.com/
>>>
>>> Changes in V2:
>>> 1. Refactoring the code based on James's comment for optimization.
>>> Link to V1 - https://lore.kernel.org/all/20250826070150.5603-1- 
>>> jie.gan@....qualcomm.com/
>>>
>>> Tao Zhang (3):
>>>    coresight: tpda: add sysfs nodes for tpda cross-trigger configuration
>>>    coresight: tpda: add logic to configure TPDA_SYNCR register
>>>    coresight: tpda: add sysfs node to flush specific port
>>>
>>>   .../testing/sysfs-bus-coresight-devices-tpda  |  50 ++++
>>>   drivers/hwtracing/coresight/coresight-tpda.c  | 278 ++++++++++++++++++
>>>   drivers/hwtracing/coresight/coresight-tpda.h  |  33 ++-
>>>   3 files changed, 360 insertions(+), 1 deletion(-)
>>>   create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight- 
>>> devices-tpda
>>>
>>
>> Reviewed-by: James Clark <james.clark@...aro.org>
>>
> 
> Gentle ping.

Hi Suzuki,

James has reviewed the patch series. May I know whether you have any 
comments about the patch series before get applied?

Thanks,
Jie

> 
>