linux-kernel - Re: [PATCH V4,0/5] Support jpeg encoder for MT8195

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Message-ID: <CAGXv+5H3MRhSi=x0UA2vsXheDjVR0Cdig0DmEvS5dLLgSBCnvA@mail.gmail.com>
Date:   Fri, 24 Sep 2021 15:55:04 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     "kyrie.wu" <kyrie.wu@...iatek.com>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tzung-Bi Shih <tzungbi@...omium.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>, xia.jiang@...iatek.com,
        Maoguang Meng <maoguang.meng@...iatek.com>,
        srv_heupstream <srv_heupstream@...iatek.com>,
        Irui Wang <irui.wang@...iatek.com>
Subject: Re: [PATCH V4,0/5] Support jpeg encoder for MT8195

On Fri, Sep 24, 2021 at 3:46 PM kyrie.wu <kyrie.wu@...iatek.com> wrote:
>
> MT8195 has two jpeg encoding HW, each one has its own
> power-domain, clock, interrupt, register base.
> The two jpeg encoding HW can work together to
> achieve higher performance.
>
> Generally, one HW needs to register one device node,
> and the APP operates the HW through the device node.
> If there are multiple HWs, the multiple device node
> needs to be registered. At this time, the app needs
> to design software logic to use multiple HWs in parallel,
> which will undoubtedly increase the difficulty of
> app development and weaken its compatibility.
>
> These serial patches use the component framework
> to achieve the purpose of using multiple HWs
> through only one device node. About the component
> framework Block Diagram, please check below:
>
>                 Master(device node)
>         ________|_________________________
>         |                      |             |
> component0(HW0) component1(HW1) component2(HW2) ......
>
> As above, the component framework is similar to a
> master-component two level architecture.
> Both master and component have the compatible
> attribute in the device tree, and the corresponding
> platform driver structure is defined in the driver.
> Therefore, when the compatible attribute matches,
> the corresponding probe function will be called.
>
> In the probe function of component, operations
> such as initialization clock, remmap register base,
> registration interrupt will be performed.
> And add the component to a component linked
> list to find the corresponding master.
>
> In the probe function of the master, the device
> node will be registered, and the master will be
> added to a master linked list to find the
> corresponding component.
>
> After the master matches the component,
> it will obtain the clock, interrupt, register base
> and other resources in the component,
> and operate the HW through these resources.
> At the same time, multiple HWs software function
> interfaces are designed in the master driver.

Please include a changelog with your cover letter (or in each patch).
This is the fourth version of the series, and it's unclear what has
changed between the versions.

ChenYu

> kyrie.wu (5):
>   dt-bindings: mediatek: Add mediatek, mt8195-jpgenc compatible
>   media: mtk-jpegenc: Use component framework to manage each hardware
>   media: mtk-jpegenc: add jpegenc timeout func interface
>   media: mtk-jpegenc: add jpeg encode worker interface
>   media: mtk-jpegenc: add output pic reorder interface
>
>  .../bindings/media/mediatek-jpeg-encoder.yaml      |   3 +
>  drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c    | 395 ++++++++++++++++++---
>  drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h    |  79 +++++
>  drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c  | 298 ++++++++++++++++
>  4 files changed, 730 insertions(+), 45 deletions(-)
>
> --
> 2.6.4
>
>
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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