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[PATCH v1 1/6] dt-bindings: display/mediatek: mt8188: Add documentations for VDOSYS1

Hsiao Chien Sung posted 6 patches 1 year, 3 months ago
There is a newer version of this series
[PATCH v1 1/6] dt-bindings: display/mediatek: mt8188: Add documentations for VDOSYS1
Posted by Hsiao Chien Sung 1 year, 3 months ago 
Add device tree documentations for MT8188 VDOSYS1.

Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
---
 .../bindings/arm/mediatek/mediatek,mmsys.yaml |  1 +
 .../display/mediatek/mediatek,ethdr.yaml      |  5 +-
 .../display/mediatek/mediatek,mdp-rdma.yaml   |  5 +-
 .../display/mediatek/mediatek,merge.yaml      |  1 +
 .../display/mediatek/mediatek,padding.yaml    | 80 +++++++++++++++++++
 5 files changed, 90 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml

diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
index 536f5a5ebd24..642fa2e4736e 100644
--- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
+++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
@@ -32,6 +32,7 @@ properties:
               - mediatek,mt8183-mmsys
               - mediatek,mt8186-mmsys
               - mediatek,mt8188-vdosys0
+              - mediatek,mt8188-vdosys1
               - mediatek,mt8192-mmsys
               - mediatek,mt8195-vdosys1
               - mediatek,mt8195-vppsys0
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml
index 801fa66ae615..e3f740ab0564 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml
@@ -23,7 +23,10 @@ description:

 properties:
   compatible:
-    const: mediatek,mt8195-disp-ethdr
+    oneOf:
+      - enum:
+        - mediatek,mt8188-disp-ethdr
+        - mediatek,mt8195-disp-ethdr

   reg:
     maxItems: 7
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml
index dd12e2ff685c..07c345fa9178 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml
@@ -21,7 +21,10 @@ description:

 properties:
   compatible:
-    const: mediatek,mt8195-vdo1-rdma
+    oneOf:
+      - enum:
+        - mediatek,mt8188-vdo1-rdma
+        - mediatek,mt8195-vdo1-rdma

   reg:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml
index 2f8e2f4dc3b8..600f1b4608f8 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml
@@ -23,6 +23,7 @@ properties:
     oneOf:
       - enum:
           - mediatek,mt8173-disp-merge
+          - mediatek,mt8188-disp-merge
           - mediatek,mt8195-disp-merge

   reg:
diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
new file mode 100644
index 000000000000..8a9e74cbf6dc
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/mediatek/mediatek,padding.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek PADDING
+
+maintainers:
+  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
+  - Philipp Zabel <p.zabel@pengutronix.de>
+
+description:
+  MediaTek PADDING provides ability to VDOSYS1 to fill pixels to
+  width and height of a layer with a specified color.
+  Since MIXER in VDOSYS1 requires the width of a layer to be 2-pixel-align, or
+  4-pixel-align when ETHDR is enabled, we need PADDING to deal with odd width.
+  Please notice that even if the PADDING is in bypass mode,
+  settings in the registers must be cleared to 0, otherwise
+  undeinfed behaviors could happen.
+
+properties:
+  compatible:
+    const: mediatek,mt8188-vdo1-padding
+
+  reg:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: RDMA Clock
+
+  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/dt-bindings/gce/<chip>-gce.h of each chips.
+    $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
+  - mediatek,gce-client-reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/mt8188-clk.h>
+    #include <dt-bindings/power/mt8188-power.h>
+    #include <dt-bindings/gce/mt8188-gce.h>
+    #include <dt-bindings/memory/mt8188-memory-port.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        vdo1_padding0: vdo1_padding0@1c11d000 {
+            compatible = "mediatek,mt8188-vdo1-padding";
+            reg = <0 0x1c11d000 0 0x1000>;
+            clocks = <&vdosys1 CLK_VDO1_PADDING0>;
+            power-domains = <&spm MT8188_POWER_DOMAIN_VDOSYS1>;
+            mediatek,gce-client-reg =
+                <&gce0 SUBSYS_1c11XXXX 0xd000 0x1000>;
+        };
+    };
--
2.18.0
Re: [PATCH v1 1/6] dt-bindings: display/mediatek: mt8188: Add documentations for VDOSYS1
Posted by Chun-Kuang Hu 1 year, 3 months ago 
Hi, Hsiao-chien:

Separate mmsys part to another patch because it would go through
different maintainer's tree.

Separate padding part to another patch because it's a new device.

Regards,
Chun-Kuang.

Hsiao Chien Sung <shawn.sung@mediatek.com> 於 2023年6月7日 週三 下午2:11寫道：
>
> Add device tree documentations for MT8188 VDOSYS1.
>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
> ---
>  .../bindings/arm/mediatek/mediatek,mmsys.yaml |  1 +
>  .../display/mediatek/mediatek,ethdr.yaml      |  5 +-
>  .../display/mediatek/mediatek,mdp-rdma.yaml   |  5 +-
>  .../display/mediatek/mediatek,merge.yaml      |  1 +
>  .../display/mediatek/mediatek,padding.yaml    | 80 +++++++++++++++++++
>  5 files changed, 90 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
>
> diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
> index 536f5a5ebd24..642fa2e4736e 100644
> --- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
> +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
> @@ -32,6 +32,7 @@ properties:
>                - mediatek,mt8183-mmsys
>                - mediatek,mt8186-mmsys
>                - mediatek,mt8188-vdosys0
> +              - mediatek,mt8188-vdosys1
>                - mediatek,mt8192-mmsys
>                - mediatek,mt8195-vdosys1
>                - mediatek,mt8195-vppsys0
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml
> index 801fa66ae615..e3f740ab0564 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml
> @@ -23,7 +23,10 @@ description:
>
>  properties:
>    compatible:
> -    const: mediatek,mt8195-disp-ethdr
> +    oneOf:
> +      - enum:
> +        - mediatek,mt8188-disp-ethdr
> +        - mediatek,mt8195-disp-ethdr
>
>    reg:
>      maxItems: 7
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml
> index dd12e2ff685c..07c345fa9178 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml
> @@ -21,7 +21,10 @@ description:
>
>  properties:
>    compatible:
> -    const: mediatek,mt8195-vdo1-rdma
> +    oneOf:
> +      - enum:
> +        - mediatek,mt8188-vdo1-rdma
> +        - mediatek,mt8195-vdo1-rdma
>
>    reg:
>      maxItems: 1
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml
> index 2f8e2f4dc3b8..600f1b4608f8 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,merge.yaml
> @@ -23,6 +23,7 @@ properties:
>      oneOf:
>        - enum:
>            - mediatek,mt8173-disp-merge
> +          - mediatek,mt8188-disp-merge
>            - mediatek,mt8195-disp-merge
>
>    reg:
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
> new file mode 100644
> index 000000000000..8a9e74cbf6dc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/mediatek/mediatek,padding.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek PADDING
> +
> +maintainers:
> +  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
> +  - Philipp Zabel <p.zabel@pengutronix.de>
> +
> +description:
> +  MediaTek PADDING provides ability to VDOSYS1 to fill pixels to
> +  width and height of a layer with a specified color.
> +  Since MIXER in VDOSYS1 requires the width of a layer to be 2-pixel-align, or
> +  4-pixel-align when ETHDR is enabled, we need PADDING to deal with odd width.
> +  Please notice that even if the PADDING is in bypass mode,
> +  settings in the registers must be cleared to 0, otherwise
> +  undeinfed behaviors could happen.
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8188-vdo1-padding
> +
> +  reg:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: RDMA Clock
> +
> +  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/dt-bindings/gce/<chip>-gce.h of each chips.
> +    $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
> +  - mediatek,gce-client-reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/mt8188-clk.h>
> +    #include <dt-bindings/power/mt8188-power.h>
> +    #include <dt-bindings/gce/mt8188-gce.h>
> +    #include <dt-bindings/memory/mt8188-memory-port.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        vdo1_padding0: vdo1_padding0@1c11d000 {
> +            compatible = "mediatek,mt8188-vdo1-padding";
> +            reg = <0 0x1c11d000 0 0x1000>;
> +            clocks = <&vdosys1 CLK_VDO1_PADDING0>;
> +            power-domains = <&spm MT8188_POWER_DOMAIN_VDOSYS1>;
> +            mediatek,gce-client-reg =
> +                <&gce0 SUBSYS_1c11XXXX 0xd000 0x1000>;
> +        };
> +    };
> --
> 2.18.0
>
Re: [PATCH v1 1/6] dt-bindings: display/mediatek: mt8188: Add documentations for VDOSYS1
Posted by Krzysztof Kozlowski 1 year, 3 months ago 
On 07/06/2023 08:11, Hsiao Chien Sung wrote:
> Add device tree documentations for MT8188 VDOSYS1.

It does not look like you tested the bindings, at least after quick
look. Please run `make dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).
Maybe you need to update your dtschema and yamllint.

> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
> new file mode 100644
> index 000000000000..8a9e74cbf6dc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/mediatek/mediatek,padding.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek PADDING
> +
> +maintainers:
> +  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
> +  - Philipp Zabel <p.zabel@pengutronix.de>
> +
> +description:
> +  MediaTek PADDING provides ability to VDOSYS1 to fill pixels to
> +  width and height of a layer with a specified color.
> +  Since MIXER in VDOSYS1 requires the width of a layer to be 2-pixel-align, or
> +  4-pixel-align when ETHDR is enabled, we need PADDING to deal with odd width.
> +  Please notice that even if the PADDING is in bypass mode,
> +  settings in the registers must be cleared to 0, otherwise
> +  undeinfed behaviors could happen.

Typo, undefined

> +



> +required:
> +  - compatible
> +  - reg
> +  - power-domains
> +  - clocks
> +  - mediatek,gce-client-reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/mt8188-clk.h>
> +    #include <dt-bindings/power/mt8188-power.h>
> +    #include <dt-bindings/gce/mt8188-gce.h>
> +    #include <dt-bindings/memory/mt8188-memory-port.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        vdo1_padding0: vdo1_padding0@1c11d000 {

No underscores in node names.

Node names should be generic. See also explanation and list of examples
in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

> +            compatible = "mediatek,mt8188-vdo1-padding";
> +            reg = <0 0x1c11d000 0 0x1000>;
> +            clocks = <&vdosys1 CLK_VDO1_PADDING0>;
> +            power-domains = <&spm MT8188_POWER_DOMAIN_VDOSYS1>;
> +            mediatek,gce-client-reg =
> +                <&gce0 SUBSYS_1c11XXXX 0xd000 0x1000>;

Wrong wrapping. It's one line. Properties should not be wrapped after '='.


Best regards,
Krzysztof
Re: [PATCH v1 1/6] dt-bindings: display/mediatek: mt8188: Add documentations for VDOSYS1
Posted by Shawn Sung (宋孝謙) 1 year, 3 months ago 
Hi Krzysztof,

Sorry, I missed this step in my SOP.
Will follow the instruction below to check again,
thank you for the information.

Best regards,
Hsiao Chien Sung

On Wed, 2023-06-07 at 09:26 +0200, Krzysztof Kozlowski wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  
> On 07/06/2023 08:11, Hsiao Chien Sung wrote:
> > Add device tree documentations for MT8188 VDOSYS1.
> 
> It does not look like you tested the bindings, at least after quick
> look. Please run `make dt_binding_check` (see
> Documentation/devicetree/bindings/writing-schema.rst for
> instructions).
> Maybe you need to update your dtschema and yamllint.
> 
> > diff --git
> a/Documentation/devicetree/bindings/display/mediatek/mediatek,padding
> .yaml
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding
> .yaml
> > new file mode 100644
> > index 000000000000..8a9e74cbf6dc
> > --- /dev/null
> > +++
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,padding
> .yaml
> > @@ -0,0 +1,80 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: 
> http://devicetree.org/schemas/display/mediatek/mediatek,padding.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: MediaTek PADDING
> > +
> > +maintainers:
> > +  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
> > +  - Philipp Zabel <p.zabel@pengutronix.de>
> > +
> > +description:
> > +  MediaTek PADDING provides ability to VDOSYS1 to fill pixels to
> > +  width and height of a layer with a specified color.
> > +  Since MIXER in VDOSYS1 requires the width of a layer to be 2-
> pixel-align, or
> > +  4-pixel-align when ETHDR is enabled, we need PADDING to deal
> with odd width.
> > +  Please notice that even if the PADDING is in bypass mode,
> > +  settings in the registers must be cleared to 0, otherwise
> > +  undeinfed behaviors could happen.
> 
> Typo, undefined
> 
> > +
> 
> 
> 
> > +required:
> > +  - compatible
> > +  - reg
> > +  - power-domains
> > +  - clocks
> > +  - mediatek,gce-client-reg
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +    #include <dt-bindings/clock/mt8188-clk.h>
> > +    #include <dt-bindings/power/mt8188-power.h>
> > +    #include <dt-bindings/gce/mt8188-gce.h>
> > +    #include <dt-bindings/memory/mt8188-memory-port.h>
> > +
> > +    soc {
> > +        #address-cells = <2>;
> > +        #size-cells = <2>;
> > +
> > +        vdo1_padding0: vdo1_padding0@1c11d000 {
> 
> No underscores in node names.
> 
> Node names should be generic. See also explanation and list of
> examples
> in DT specification:
> 
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation
> 
> > +            compatible = "mediatek,mt8188-vdo1-padding";
> > +            reg = <0 0x1c11d000 0 0x1000>;
> > +            clocks = <&vdosys1 CLK_VDO1_PADDING0>;
> > +            power-domains = <&spm MT8188_POWER_DOMAIN_VDOSYS1>;
> > +            mediatek,gce-client-reg =
> > +                <&gce0 SUBSYS_1c11XXXX 0xd000 0x1000>;
> 
> Wrong wrapping. It's one line. Properties should not be wrapped after
> '='.
> 
> 
> Best regards,
> Krzysztof
>
Re: [PATCH v1 1/6] dt-bindings: display/mediatek: mt8188: Add documentations for VDOSYS1
Posted by Rob Herring 1 year, 3 months ago 
On Wed, 07 Jun 2023 14:11:16 +0800, Hsiao Chien Sung wrote:
> Add device tree documentations for MT8188 VDOSYS1.
> 
> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
> ---
>  .../bindings/arm/mediatek/mediatek,mmsys.yaml |  1 +
>  .../display/mediatek/mediatek,ethdr.yaml      |  5 +-
>  .../display/mediatek/mediatek,mdp-rdma.yaml   |  5 +-
>  .../display/mediatek/mediatek,merge.yaml      |  1 +
>  .../display/mediatek/mediatek,padding.yaml    | 80 +++++++++++++++++++
>  5 files changed, 90 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,padding.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:
./Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.yaml:28:9: [warning] wrong indentation: expected 10 but found 8 (indentation)
./Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rdma.yaml:26:9: [warning] wrong indentation: expected 10 but found 8 (indentation)

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/display/mediatek/mediatek,padding.example.dts:19:18: fatal error: dt-bindings/clock/mt8188-clk.h: No such file or directory
   19 |         #include <dt-bindings/clock/mt8188-clk.h>
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.lib:419: Documentation/devicetree/bindings/display/mediatek/mediatek,padding.example.dtb] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1512: dt_binding_check] Error 2

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20230607061121.6732-2-shawn.sung@mediatek.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

Patchew 2.1-devel-b67e4c2

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