Subject: Re: [PATCH v7 02/13] dt-bindings: display: mediatek: Add mmsys binding description

From: Rob Herring <[email-masked]>
Date: Tue, 18 Feb 2020 14:31:51 -0600

On Thu, Feb 13, 2020 at 09:19:42PM +0100, [email-masked] wrote:
> From: Matthias Brugger <[email-masked]>
> 
> The MediaTek DRM has a block called mmsys, which sets
> the routing and enables the different blocks.
> This patch adds one line for the mmsys bindings description and changes
> the mmsys description to use the generic form of referring to a specific
> Soc.
> 
> Signed-off-by: Matthias Brugger <[email-masked]>
> 
> ---
> 
> Changes in v7:
> - add hint to the mmsys binding document
> - make mmsys description generic
> - fix typo in commit message
> 
> Changes in v6: None
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
> 
>  .../bindings/display/mediatek/mediatek,disp.txt          | 3 +++
>  .../bindings/display/mediatek/mediatek,mmsys.txt         | 9 +--------
>  2 files changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> index b91e709db7a4..8e453026ef78 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
> @@ -24,6 +24,7 @@ connected to.
>  For a description of the display interface sink function blocks, see
>  Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt and
>  Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt.
> +Documentation/devicetree/bindings/display/mediatek/mediatek,mmsys.txt.
>  
>  Required properties (all function blocks):
>  - compatible: "mediatek,<chip>-disp-<function>", one of
> @@ -43,7 +44,9 @@ Required properties (all function blocks):
>  	"mediatek,<chip>-dpi"        		- DPI controller, see mediatek,dpi.txt
>  	"mediatek,<chip>-disp-mutex" 		- display mutex
>  	"mediatek,<chip>-disp-od"    		- overdrive
> +	"mediatek,<chip>-mmsys", "syscon"	- provide clocks and components management
>    the supported chips are mt2701, mt2712 and mt8173.
> +
>  - reg: Physical base address and length of the function block register space
>  - interrupts: The interrupt signal from the function block (required, except for
>    merge and split function blocks).
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mmsys.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,mmsys.txt
> index 301eefbe1618..7bbadee820e3 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,mmsys.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mmsys.txt
> @@ -5,14 +5,7 @@ The Mediatek mmsys controller provides various clocks to the system.
>  
>  Required Properties:
>  
> -- compatible: Should be one of:
> -	- "mediatek,mt2701-mmsys", "syscon"
> -	- "mediatek,mt2712-mmsys", "syscon"
> -	- "mediatek,mt6779-mmsys", "syscon"
> -	- "mediatek,mt6797-mmsys", "syscon"
> -	- "mediatek,mt7623-mmsys", "mediatek,mt2701-mmsys", "syscon"

You've lost this information about the fallback...

> -	- "mediatek,mt8173-mmsys", "syscon"
> -	- "mediatek,mt8183-mmsys", "syscon"
> +- compatible: "mediatek,<chip>-mmsys"

You are just going to have to add these all back when this is converted 
to schema.

Rob

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