linux-kernel - Re: [PATCH v3 0/8] Add support to configure TPDM CMB subunit

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Message-ID: <4657c916-03c1-47eb-ba2d-5e84f3600282@arm.com>
Date: Fri, 12 Jan 2024 11:57:30 +0000
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Tao Zhang <quic_taozha@...cinc.com>,
 Mathieu Poirier <mathieu.poirier@...aro.org>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Konrad Dybcio <konradybcio@...il.com>, Mike Leach <mike.leach@...aro.org>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Jinlong Mao <quic_jinlmao@...cinc.com>, Leo Yan <leo.yan@...aro.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, coresight@...ts.linaro.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, Tingwei Zhang <quic_tingweiz@...cinc.com>,
 Yuanfang Zhang <quic_yuanfang@...cinc.com>,
 Trilok Soni <quic_tsoni@...cinc.com>, Song Chai <quic_songchai@...cinc.com>,
 linux-arm-msm@...r.kernel.org, andersson@...nel.org
Subject: Re: [PATCH v3 0/8] Add support to configure TPDM CMB subunit

On 21/11/2023 02:24, Tao Zhang wrote:
> Introduction of TPDM CMB(Continuous Multi Bit) subunit
> CMB 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 CMB makes trace elements in two modes. In �continuous� mode, every
> valid data cycle creates an element. In �trace on change� mode, when
> valid data changes on the bus, a trace element is created. In
> continuous mode, all cycles where this condition is true create trace
> elements. In trace on change mode, a data element is only when the
> previously sampled input is different from the current sampled input.
> 
> The CMB subunit must be configured prior to enablement. This series
> adds support for TPDM to configure the configure CMB subunit.
> 


Please base your next version on for-next/queue branch on the
coresight repository.

Suzuki