linux-kernel - Re: [PATCH v2 0/3] Add support to configure TPDM MCMB subunit

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Message-ID: <65de323b-ee7f-41cf-a300-1cf883494d1d@quicinc.com>
Date: Tue, 17 Dec 2024 15:47:06 +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@...aro.org>,
        Alexander
 Shishkin <alexander.shishkin@...ux.intel.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2 0/3] Add support to configure TPDM MCMB subunit



On 2024/11/5 20:39, Mao Jinlong wrote:
> Introduction of TPDM MCMB(Multi-lane Continuous Multi Bit) subunit
> MCMB (Multi-lane CMB) is a special form of CMB dataset type. MCMB
> subunit has the same number and usage of registers as CMB subunit.
> Just like the CMB subunit, the MCMB subunit must be configured prior
> to enablement. This series adds support for TPDM to configure the
> MCMB 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 MCMB subunit. All sysfs files of CMB subunit TPDM are
> included in MCMB subunit TPDM. On this basis, MCMB subunit TPDM will
> have new sysfs files to select and enable the lane.
> 
> Changes in V2:
> 1. Use tdpm_data->cmb instead of (tpdm_has_cmb_dataset(tpdm_data) ||
> tpdm_has_mcmb_dataset(tpdm_data)) for cmb dataset support.
> 2. Embed mcmb_dataset struct into cmb struct.
> 3. Update the date and version in sysfs-bus-coresight-devices-tpdm
> 
> Mao Jinlong (1):
>    coresight-tpdm: Add MCMB dataset support
> 
> Tao Zhang (2):
>    coresight-tpdm: Add support to select lane
>    coresight-tpdm: Add support to enable the lane for MCMB TPDM
> 
>   .../testing/sysfs-bus-coresight-devices-tpdm  |  15 +++
>   drivers/hwtracing/coresight/coresight-tpda.c  |   7 +-
>   drivers/hwtracing/coresight/coresight-tpdm.c  | 124 +++++++++++++++++-
>   drivers/hwtracing/coresight/coresight-tpdm.h  |  33 +++--
>   4 files changed, 158 insertions(+), 21 deletions(-)

Gentle reminder for the review.
>