Re: [PATCH v2 1/3] dt-bindings: mediatek: add vdosys1 RDMA definition for mt8195

[Rex-BC Chen]

On 5/9/22 4:45 PM, Rex-BC Chen wrote:
> On Mon, 2022-05-09 at 15:31 +0800, Krzysztof Kozlowski wrote:
> > On 09/05/2022 06:43, Rex-BC Chen wrote:
> > > From: "Nancy.Lin" <nancy.lin@xxxxxxxxxxxx>
> > >
> > > Add vdosys1 RDMA definition.
> > >
> > > Signed-off-by: Nancy.Lin <nancy.lin@xxxxxxxxxxxx>
> > > Reviewed-by: AngeloGioacchino Del Regno <
> > > angelogioacchino.delregno@xxxxxxxxxxxxx>
> > > ---
> > >   .../display/mediatek/mediatek,mdp-rdma.yaml   | 94
> > > +++++++++++++++++++
> > >   1 file changed, 94 insertions(+)
> > >   create mode 100644
> > > Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-
> > > rdma.yaml
> > >
> > > diff --git
> > > a/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-
> > > rdma.yaml
> > > b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-
> > > rdma.yaml
> > > new file mode 100644
> > > index 000000000000..ca31accb0a95
> > > --- /dev/null
> > > +++
> > > b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-
> > > rdma.yaml
> > > @@ -0,0 +1,94 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id:
> > > https://urldefense.com/v3/__http://devicetree.org/schemas/display/mediatek/mediatek,mdp-rdma.yaml*__;Iw!!CTRNKA9wMg0ARbw!x6pqRSLbN1fx6j57PKXCTTp8n7bulgpLzXS8uUh5vAIxkRKD8K6EqOopnFrXvT54LQXmIEDFFvPQzC4ldr1TddEeTw$
> > >   
> > > +$schema:
> > > https://urldefense.com/v3/__http://devicetree.org/meta-schemas/core.yaml*__;Iw!!CTRNKA9wMg0ARbw!x6pqRSLbN1fx6j57PKXCTTp8n7bulgpLzXS8uUh5vAIxkRKD8K6EqOopnFrXvT54LQXmIEDFFvPQzC4ldr3y-9sW3w$
> > >   
> > > +
> > > +title: MediaTek MDP RDMA
> > > +
> > > +maintainers:
> > > +  - Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
> > > +  - Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> > > +
> > > +description:
> > > +  The MediaTek MDP RDMA stands for Read Direct Memory Access.
> > > +  It provides real time data to the back-end panel driver, such as
> > > DSI,
> > > +  DPI and DP_INTF.
> > > +  It contains one line buffer to store the sufficient pixel data.
> > > +  RDMA device node 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.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    oneOf:
> > oneOf is not needed
> >
> > > +      - items:
> > items not needed, you have only one item.
> Hello Krzysztof,
>
> Thanks for your review.
> ok, we will drop them.
>
> > > +          - const: mediatek,mt8195-vdo1-rdma
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  interrupts:
> > > +    maxItems: 1
> > > +
> > > +  power-domains:
> > > +    description: A phandle and PM domain specifier as defined by
> > > bindings of
> > > +      the power controller specified by phandle. See
> > > +      Documentation/devicetree/bindings/power/power-domain.yaml
> > > for details.
> > Skip description, it's obvious. Instead maxItems.
> ok, we will fix it.
>
> > > +
> > > +  clocks:
> > > +    items:
> > > +      - description: RDMA Clock
> > > +
> > > +  iommus:
> > > +    description:
> > > +      This property should point to the respective IOMMU block
> > > with master port as argument,
> > > +      see
> > > Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for
> > > details.
> > Skip description, it's obvious. Instead maxItems.
> ok, we will fix it.
>
> > > +
> > > +  mediatek,gce-client-reg:
> > > +    description:
> > > +      The register of display function block to be set by gce.
> > > There are 4 arguments,
> > > +      such as gce node, subsys id, offset and register size. The
> > > subsys id that is
> > > +      mapping to the register of display function blocks is
> > > defined in the gce header
> > > +      include/include/dt-bindings/gce/<chip>-gce.h of each chips.
> > Double "include" in the path.
> ok, we will fix it.
>
> > > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > > +    items:
> > > +      items:
> > > +        - description: phandle of GCE
> > > +        - description: GCE subsys id
> > > +        - description: register offset
> > > +        - description: register size
> > > +    maxItems: 1
> > > +
> > > +required:
> > > +  - compatible
> > > +  - reg
> > > +  - power-domains
> > > +  - clocks
> > > +  - iommus
> > > +  - mediatek,gce-client-reg
> > > +
> > > +additionalProperties: false
> > > +
> > > +examples:
> > > +  - |
> > > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > +    #include <dt-bindings/clock/mt8195-clk.h>
> > > +    #include <dt-bindings/power/mt8195-power.h>
> > > +    #include <dt-bindings/gce/mt8195-gce.h>
> > > +    #include <dt-bindings/memory/mt8195-memory-port.h>
> > > +
> > > +    soc {
> > > +        #address-cells = <2>;
> > > +        #size-cells = <2>;
> > > +
> > > +        vdo1_rdma0: mdp-rdma@1c104000 {
> > Generic node name. dma-controller (if it does not conflict with
> > dma-common.yaml schema)?
> We don't understand what dma-controller you are referring to? Can you
> help explain more? Thanks!
>
> BRs,
> Rex
Hello Krzysztof,


Could you also help us to explain what do you mean here?

Thanks!


BRs,

Rex
> > > +            compatible = "mediatek,mt8195-vdo1-rdma";
> > > +            reg = <0 0x1c104000 0 0x1000>;
> > > +            interrupts = <GIC_SPI 495 IRQ_TYPE_LEVEL_HIGH 0>;
> > > +            clocks = <&vdosys1 CLK_VDO1_MDP_RDMA0>;
> > > +            power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
> > > +            iommus = <&iommu_vdo M4U_PORT_L2_MDP_RDMA0>;
> > > +            mediatek,gce-client-reg = <&gce0 SUBSYS_1c10XXXX
> > > 0x4000 0x1000>;
> > > +        };
> > > +    };
> >
> > Best regards,
> > Krzysztof