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dt-bindings: display: mediatek: padding: Add MT8188
Padding is a new hardware module on MediaTek MT8188, add dt-bindings for it. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: CK Hu <ck.hu@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/display/mediatek/mediatek,padding.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: MediaTek Display Padding
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maintainers:
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- Chun-Kuang Hu <chunkuang.hu@kernel.org>
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- Philipp Zabel <p.zabel@pengutronix.de>
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description:
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Padding provides ability to add pixels to width and height of a layer with
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specified colors. Due to hardware design, Mixer in VDOSYS1 requires
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width of a layer to be 2-pixel-align, or 4-pixel-align when ETHDR is enabled,
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we need Padding to deal with odd width.
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Please notice that even if the Padding is in bypass mode, settings in
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register must be cleared to 0, or undefined behaviors could happen.
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properties:
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compatible:
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const: mediatek,mt8188-disp-padding
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reg:
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maxItems: 1
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power-domains:
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maxItems: 1
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clocks:
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items:
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- description: Padding's clocks
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mediatek,gce-client-reg:
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description:
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GCE (Global Command Engine) is a multi-core micro processor that helps
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its clients to execute commands without interrupting CPU. This property
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describes GCE client's information that is composed by 4 fields.
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1. Phandle of the GCE (there may be several GCE processors)
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2. Sub-system ID defined in the dt-binding like a user ID
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(Please refer to include/dt-bindings/gce/<chip>-gce.h)
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3. Offset from base address of the subsys you are at
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4. Size of the register the client needs
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$ref: /schemas/types.yaml#/definitions/phandle-array
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items:
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items:
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- description: Phandle of the GCE
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- description: Subsys ID defined in the dt-binding
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- description: Offset from base address of the subsys
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- description: Size of register
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maxItems: 1
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required:
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- compatible
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- reg
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- power-domains
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- clocks
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- mediatek,gce-client-reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/clock/mediatek,mt8188-clk.h>
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#include <dt-bindings/power/mediatek,mt8188-power.h>
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#include <dt-bindings/gce/mt8195-gce.h>
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soc {
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#address-cells = <2>;
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#size-cells = <2>;
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padding0: padding@1c11d000 {
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compatible = "mediatek,mt8188-disp-padding";
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reg = <0 0x1c11d000 0 0x1000>;
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clocks = <&vdosys1 CLK_VDO1_PADDING0>;
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power-domains = <&spm MT8188_POWER_DOMAIN_VDOSYS1>;
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mediatek,gce-client-reg = <&gce0 SUBSYS_1c11XXXX 0xd000 0x1000>;
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};
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};
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