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SubjectRe: [PATCH v2 1/3] dt-bindings: mediatek: add vdosys1 RDMA definition for mt8195
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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@mediatek.com>
>>>
>>> Add vdosys1 RDMA definition.
>>>
>>> Signed-off-by: Nancy.Lin <nancy.lin@mediatek.com>
>>> Reviewed-by: AngeloGioacchino Del Regno <
>>> angelogioacchino.delregno@collabora.com>
>>> ---
>>> .../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@kernel.org>
>>> + - Philipp Zabel <p.zabel@pengutronix.de>
>>> +
>>> +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

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