Re: [PATCH 09/12] dt-bindings: media: st: dcmi: add DMA-MDMA chaining properties

Rob Herring
2025-12-29T23:39:26Z

On Thu, Dec 18, 2025 at 07:44:49PM +0100, Alain Volmat wrote:
> Add properties update and new sram property necessary in order
> to enable the DMA-MDMA chaining.
>
> Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
> ---
> Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml b/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml
> index 34147127192f..ccaa2d0a2669 100644
> --- a/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml
> +++ b/Documentation/devicetree/bindings/media/st,stm32-dcmi.yaml
> @@ -27,11 +27,14 @@ properties:
> - const: mclk
>
> dmas:
> - maxItems: 1
> + minItems: 1
> + maxItems: 2
>
> dma-names:
> items:
> - const: tx
> + - const: mdma_tx
> + minItems: 1
>
> resets:
> maxItems: 1
> @@ -40,6 +43,14 @@ properties:
> minItems: 1
> maxItems: 2
>
> + sram:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description:
> + phandles to a reserved SRAM region which is used as temporary

phandle to...

> + storage memory between DMA and MDMA engines.

> + The region should be defined as child nodes of the AHB SRAM node
> + as per the generic bindings in Documentation/devicetree/bindings/sram/sram.yaml

Drop this sentence.

Rob