From: Georgi Djakov <georgi.djakov@linaro.org>
To: Henry Chen <henryc.chen@mediatek.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Viresh Kumar <vireshk@kernel.org>,
Stephen Boyd <swboyd@chromium.org>,
Ryan Case <ryandcase@chromium.org>,
Mark Brown <broonie@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Nicolas Boichat <drinkcat@google.com>,
Fan Chen <fan.chen@mediatek.com>,
James Liao <jamesjj.liao@mediatek.com>,
Arvin Wang <arvin.wang@mediatek.com>,
Mike Turquette <mturquette@linaro.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, srv_heupstream@mediatek.com
Subject: Re: [PATCH V4 00/13] Add driver for dvfsrc, support for active state of scpsys
Date: Wed, 1 Apr 2020 18:09:11 +0300 [thread overview]
Message-ID: <2737cc5c-3876-6861-c44f-fc9f552bbdb9@linaro.org> (raw)
In-Reply-To: <1584092066-24425-1-git-send-email-henryc.chen@mediatek.com>
Hi Henry,
On 3/13/20 11:34, Henry Chen wrote:
> The patchsets add support for MediaTek hardware module named DVFSRC
> (dynamic voltage and frequency scaling resource collector). The DVFSRC is
> a HW module which is used to collect all the requests from both software
> and hardware and turn into the decision of minimum operating voltage and
> minimum DRAM frequency to fulfill those requests.
>
> So, This series is to implement the dvfsrc driver to collect all the
> requests of operating voltage or DRAM bandwidth from other device drivers
> likes GPU/Camera through 3 frameworks basically:
>
> 1. interconnect framework: to aggregate the bandwidth
> requirements from different clients
>
> [1] https://patchwork.kernel.org/cover/10766329/
>
> Below is the emi bandwidth map of mt8183. There has a hw module "DRAM scheduler"
> which used to control the throughput. The DVFSRC will collect forecast data
> of dram bandwidth from SW consumers(camera/gpu...), and according the forecast
> to change the DRAM frequency
>
> ICC provider ICC Nodes
> ---- ----
> --------- |CPU | |--->|VPU |
> ----- | |-----> ---- | ----
> |DRAM |--|DRAM | ---- | ----
> | |--|scheduler|----->|GPU | |--->|DISP|
> | |--|(EMI) | ---- | ----
> | |--| | ----- | ----
> ----- | |----->|MMSYS|--|--->|VDEC|
> --------- ----- | ----
> /|\ | ----
> |change DRAM freq |--->|VENC|
> ---------- | ----
> | DVFSR | |
> | | | ----
> ---------- |--->|IMG |
> | ----
> | ----
> |--->|CAM |
> ----
It would be useful to also add the above diagram into the commit text of
patch 09/13. By doing so, it will be saved into the history, as cover letters
are discarded.
Thanks,
Georgi
next prev parent reply other threads:[~2020-04-01 15:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-13 9:34 [PATCH V4 00/13] Add driver for dvfsrc, support for active state of scpsys Henry Chen
2020-03-13 9:34 ` [PATCH V4 01/13] dt-bindings: soc: Add dvfsrc driver bindings Henry Chen
2020-03-13 9:34 ` [PATCH V4 02/13] dt-bindings: soc: Add opp table on scpsys bindings Henry Chen
2020-03-13 9:34 ` [PATCH V4 03/13] soc: mediatek: add support for the performance state Henry Chen
2020-03-13 9:34 ` [PATCH V4 04/13] arm64: dts: mt8183: add performance state support of scpsys Henry Chen
2020-03-13 9:34 ` [PATCH V4 05/13] soc: mediatek: add header for mediatek SIP interface Henry Chen
2020-03-13 9:34 ` [PATCH V4 06/13] soc: mediatek: add MT8183 dvfsrc support Henry Chen
2020-04-01 14:41 ` Georgi Djakov
2020-04-02 2:48 ` Henry Chen
2020-03-13 9:34 ` [PATCH V4 07/13] arm64: dts: mt8183: add dvfsrc related nodes Henry Chen
2020-03-13 9:34 ` [PATCH V4 08/13] dt-bindings: interconnect: add MT8183 interconnect dt-bindings Henry Chen
2020-03-20 23:09 ` Rob Herring
2020-03-13 9:34 ` [PATCH V4 09/13] interconnect: mediatek: Add mt8183 interconnect provider driver Henry Chen
2020-04-01 14:55 ` Georgi Djakov
2020-04-02 2:48 ` Henry Chen
2020-03-13 9:34 ` [PATCH V4 10/13] arm64: dts: mt8183: add dvfsrc related nodes Henry Chen
[not found] ` <1584092066-24425-12-git-send-email-henryc.chen@mediatek.com>
2020-03-24 20:38 ` [PATCH V4 11/13] dt-bindings: regulator: add DVFSRC regulator dt-bindings Mark Brown
2020-03-30 5:19 ` Henry Chen
2020-04-01 15:09 ` Georgi Djakov [this message]
2020-04-02 2:48 ` [PATCH V4 00/13] Add driver for dvfsrc, support for active state of scpsys Henry Chen
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