Re: [PATCH v1 01/10] dt-bindings: mediatek: add pseudo-ovl definition for mt8195

[Chun-Kuang Hu]

Hi, Nancy:

Nancy.Lin <nancy.lin@xxxxxxxxxxxx> 於 2021年7月17日 週六 下午5:04寫道：
>
> 1. Add pseudo-ovl definition file for mt8195 display.
> 2. Add mediatek,pseudo-ovl.yaml to decribe pseudo-ovl module in details.
>
> Signed-off-by: Nancy.Lin <nancy.lin@xxxxxxxxxxxx>
> ---
>  .../display/mediatek/mediatek,disp.yaml       |   5 +
>  .../display/mediatek/mediatek,pseudo-ovl.yaml | 105 ++++++++++++++++++
>  2 files changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,pseudo-ovl.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.yaml
> index aac1796e3f6b..bb6d28572b48 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.yaml
> @@ -230,6 +230,11 @@ properties:
>        - items:
>            - const: mediatek,mt8173-disp-od
>
> +      # PSEUDO-OVL: see Documentation/devicetree/bindings/display/mediatek/mediatek,pseudo-ovl.yaml
> +      # for details.
> +      - items:
> +          - const: mediatek,mt8195-disp-pseudo-ovl
> +
>    reg:
>      description: Physical base address and length of the function block register space.
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,pseudo-ovl.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,pseudo-ovl.yaml
> new file mode 100644
> index 000000000000..9059d96ce70e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,pseudo-ovl.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/mediatek/mediatek,pseudo-ovl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: mediatek pseudo ovl Device Tree Bindings
> +
> +maintainers:
> +  - CK Hu <ck.hu@xxxxxxxxxxxx>
> +  - Nancy.Lin <nancy.lin@xxxxxxxxxxxx>
> +
> +description: |
> +  The Mediatek pseudo ovl function block is composed of eight RDMA and
> +  four MERGE devices. It's encapsulated as an overlay device, which supports
> +  4 layers.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      # pseudo ovl controller
> +      - items:
> +          - const: mediatek,mt8195-disp-pseudo-ovl
> +      # RDMA: read DMA
> +      - items:
> +          - const: mediatek,mt8195-vdo1-rdma
> +      # MERGE: merge streams from two RDMA sources
> +      - items:
> +          - const: mediatek,mt8195-vdo1-merge
> +  reg:
> +    maxItems: 1
> +  interrupts:
> +    maxItems: 1
> +  iommus:
> +    description: The compatible property is DMA function blocks.
> +      Should point to the respective IOMMU block with master port as argument,
> +      see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for
> +      details.
> +    maxItems: 1
> +  clocks:
> +    maxItems: 2
> +  clock-names:
> +    maxItems: 2
> +  power-domains:
> +    maxItems: 1
> +  mediatek,gce-client-reg:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description: The register of display function block to be set by gce.
> +      There are 4 arguments in this property, gce node, subsys id, offset and
> +      register size. The subsys id is defined in the gce header of each chips
> +      include/include/dt-bindings/gce/<chip>-gce.h, mapping to the register of
> +      display function block.
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const:
> +              - mediatek,mt8195-vdo1-merge
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: merge clock
> +            - description: merge async clock
> +        clock-names:
> +          items:
> +            - const: merge
> +            - const: merge_async
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +
> +    vdo1_rdma@1c104000 {
> +            compatible = "mediatek,mt8195-vdo1-rdma",
> +                         "mediatek,mt8195-disp-pseudo-ovl";

Do not create pseudo or virtual device, so just leave the
"mediatek,mt8195-vdo1-rdma".

Regards,
Chun-Kuang.

> +            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 = <&gce1 SUBSYS_1c10XXXX 0x4000 0x1000>;
> +    };
> +
> +    disp_vpp_merge@1c10c000 {
> +            compatible = "mediatek,mt8195-vdo1-merge";
> +            reg = <0 0x1c10c000 0 0x1000>;
> +            interrupts = <GIC_SPI 503 IRQ_TYPE_LEVEL_HIGH 0>;
> +            clocks = <&vdosys1 CLK_VDO1_VPP_MERGE0>,
> +                     <&vdosys1 CLK_VDO1_MERGE0_DL_ASYNC>;
> +            clock-names = "merge","merge_async";
> +            power-domains = <&spm MT8195_POWER_DOMAIN_VDOSYS1>;
> +            mediatek,gce-client-reg = <&gce1 SUBSYS_1c10XXXX 0xc000 0x1000>;
> +    };
> +
> +...
> --
> 2.18.0
>