linux-kernel - Re: [PATCH v6 05/16] dt-bindings: media: mediatek: mdp3: add support MT8195 RDMA

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Message-ID: <5734776bbf913932367439e2b7ee860114f8adaa.camel@mediatek.com>
Date:   Tue, 3 Oct 2023 03:32:41 +0000
From:   Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>
To:     "conor@...nel.org" <conor@...nel.org>
CC:     "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
        "airlied@...il.com" <airlied@...il.com>,
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        <krzysztof.kozlowski+dt@...aro.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
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        <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v6 05/16] dt-bindings: media: mediatek: mdp3: add support
 MT8195 RDMA

On Fri, 2023-09-22 at 16:46 +0100, Conor Dooley wrote:
> On Fri, Sep 22, 2023 at 03:21:05PM +0800, Moudy Ho wrote:
> > Support for MT8195 RDMA has been added, allowing for
> > the configuration of multiple MDP3 pipes.
> > Furthermore, this particular device does not require
> > sharing SRAM with RSZ.
> 
> I'm sorry if I am going over past arguments, if this is 90% the same
> as
> the 8193 rdma, why the extraction + mostly duplicate file, rather
> than
> covering whatever clocks/mboxes differences with an if/then/else in a
> single file?
> 
> Thanks,
> Conor.
> 

Hi Conor,

As mentioned in [2/16], please disregard these changes.

Sincerely,
Moudy

> > 
> > Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
> > ---
> >  .../media/mediatek,mdp3-rdma-8195.yaml        | 64
> > +++++++++++++++++++
> >  1 file changed, 64 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/media/mediatek,mdp3-rdma-
> > 8195.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/media/mediatek,mdp3-
> > rdma-8195.yaml
> > b/Documentation/devicetree/bindings/media/mediatek,mdp3-rdma-
> > 8195.yaml
> > new file mode 100644
> > index 000000000000..f10139aec3c5
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/mediatek,mdp3-rdma-
> > 8195.yaml
> > @@ -0,0 +1,64 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: 
> > http://devicetree.org/schemas/media/mediatek,mdp3-rdma-8195.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: MediaTek MT8195 Read Direct Memory Access
> > +
> > +maintainers:
> > +  - Matthias Brugger <matthias.bgg@...il.com>
> > +  - Moudy Ho <moudy.ho@...iatek.com>
> > +
> > +description: |
> > +  MediaTek Read Direct Memory Access(RDMA) component used to do
> > read DMA.
> > +  This type of component is configured when there are multiple
> > MDP3 pipelines
> > +  that belong to different MMSYS subsystems.
> > +  It contains one line buffer to store the sufficient pixel data,
> > and
> > +  must be siblings to the central MMSYS_CONFIG node.
> > +  For a description of the MMSYS_CONFIG binding, see
> > +  Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.ya
> > ml
> > +  for details.
> > +
> > +allOf:
> > +  - $ref: mediatek,mdp3-rdma-common.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - const: mediatek,mt8195-mdp3-rdma
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  mboxes:
> > +    maxItems: 5
> > +
> > +required:
> > +  - compatible
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/mt8195-clk.h>
> > +    #include <dt-bindings/gce/mt8195-gce.h>
> > +    #include <dt-bindings/power/mt8195-power.h>
> > +    #include <dt-bindings/memory/mt8195-memory-port.h>
> > +
> > +    dma-controller@...01000 {
> > +        compatible = "mediatek,mt8195-mdp3-rdma";
> > +        reg = <0x14001000 0x1000>;
> > +        mediatek,gce-client-reg = <&gce1 SUBSYS_1400XXXX 0x1000
> > 0x1000>;
> > +        mediatek,gce-events = <CMDQ_EVENT_VPP0_MDP_RDMA_SOF>,
> > +                              <CMDQ_EVENT_VPP0_MDP_RDMA_FRAME_DONE
> > >;
> > +        power-domains = <&spm MT8195_POWER_DOMAIN_VPPSYS0>;
> > +        iommus = <&iommu_vpp M4U_PORT_L4_MDP_RDMA>;
> > +        clocks = <&vppsys0 CLK_VPP0_MDP_RDMA>;
> > +        mboxes = <&gce1 12 CMDQ_THR_PRIO_1>,
> > +                 <&gce1 13 CMDQ_THR_PRIO_1>,
> > +                 <&gce1 14 CMDQ_THR_PRIO_1>,
> > +                 <&gce1 21 CMDQ_THR_PRIO_1>,
> > +                 <&gce1 22 CMDQ_THR_PRIO_1>;
> > +        #dma-cells = <1>;
> > +    };
> > -- 
> > 2.18.0
> >