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Message-ID: <4657c916-03c1-47eb-ba2d-5e84f3600282@arm.com>
Date: Fri, 12 Jan 2024 11:57:30 +0000
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Subject: Re: [PATCH v3 0/8] Add support to configure TPDM CMB subunit
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To: Tao Zhang <quic_taozha@quicinc.com>,
 Mathieu Poirier <mathieu.poirier@linaro.org>,
 Alexander Shishkin <alexander.shishkin@linux.intel.com>,
 Konrad Dybcio <konradybcio@gmail.com>, Mike Leach <mike.leach@linaro.org>,
 Rob Herring <robh+dt@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Jinlong Mao <quic_jinlmao@quicinc.com>, Leo Yan <leo.yan@linaro.org>,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>, coresight@lists.linaro.org,
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 devicetree@vger.kernel.org, Tingwei Zhang <quic_tingweiz@quicinc.com>,
 Yuanfang Zhang <quic_yuanfang@quicinc.com>,
 Trilok Soni <quic_tsoni@quicinc.com>, Song Chai <quic_songchai@quicinc.com>,
 linux-arm-msm@vger.kernel.org, andersson@kernel.org
References: <1700533494-19276-1-git-send-email-quic_taozha@quicinc.com>
From: Suzuki K Poulose <suzuki.poulose@arm.com>
In-Reply-To: <1700533494-19276-1-git-send-email-quic_taozha@quicinc.com>
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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