linux-kernel - Re: [PATCH 2/3] media: dt-bindings: rockchip: Document RK3588 Video Decoder 2 bindings

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Date: Sat, 15 Jun 2024 10:11:00 +0200
From: Jonas Karlman <jonas@...boo.se>
To: Detlev Casanova <detlev.casanova@...labora.com>
Cc: linux-kernel@...r.kernel.org, Mauro Carvalho Chehab
 <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner
 <heiko@...ech.de>, "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
 Sebastian Reichel <sebastian.reichel@...labora.com>, Dragan Simic
 <dsimic@...jaro.org>, Alexey Charkov <alchark@...il.com>, Cristian
 Ciocaltea <cristian.ciocaltea@...labora.com>, Diederik de Haas
 <didi.debian@...ow.org>, Andy Yan <andy.yan@...k-chips.com>,
 linux-media@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 linux-staging@...ts.linux.dev
Subject: Re: [PATCH 2/3] media: dt-bindings: rockchip: Document RK3588 Video
 Decoder 2 bindings

Hi Detlev,

On 2024-06-15 03:56, Detlev Casanova wrote:
> Document the Rockchip RK3588 Video Decoder 2 bindings.

Why the need for a new schema file and not just extending existing
rockchip,vdec.yaml with a new compatible and the new clock?

> 
> Signed-off-by: Detlev Casanova <detlev.casanova@...labora.com>
> ---
>  .../bindings/media/rockchip,vdec2.yaml        | 80 +++++++++++++++++++
>  1 file changed, 80 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/rockchip,vdec2.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/rockchip,vdec2.yaml b/Documentation/devicetree/bindings/media/rockchip,vdec2.yaml
> new file mode 100644
> index 000000000000..e54891b46986
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/rockchip,vdec2.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/rockchip,vdec2.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Rockchip Video Decoder 2 (VDec2)
> +
> +maintainers:
> +  - Heiko Stuebner <heiko@...ech.de>
> +
> +description: |-
> +  The Rockchip rk3588 has a stateless Video Decoder that can decodes H.264,
> +  HEVC, VP9 and AVS2 streams.
> +
> +properties:
> +  compatible:
> +    const: rockchip,rk3588-vdec2

I fail to see the need to call this vdec2 instead of established vdec.

Suggest this is changed to rockchip,rk3588-vdec.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: The Video decoder AXI interface clock
> +      - description: The Video decoder AHB interface clock
> +      - description: The Video decoder core clock
> +      - description: The Video decoder CABAC clock
> +      - description: The Video decoder HEVC CABAC clock
> +
> +  clock-names:
> +    items:
> +      - const: axi
> +      - const: ahb
> +      - const: core
> +      - const: cabac
> +      - const: hevc_cabac
> +
> +  assigned-clocks: true
> +
> +  assigned-clock-rates: true
> +
> +  power-domains:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - power-domains
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/rockchip,rk3588-cru.h>
> +    #include <dt-bindings/power/rk3588-power.h>
> +
> +    vdec2: video-codec@...38100 {
> +        compatible = "rockchip,rk3588-vdec2";
> +        reg = <0x0 0xfdc38100 0x0 0x500>;
> +        interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH 0>;
> +        clocks = <&cru ACLK_RKVDEC0>, <&cru HCLK_RKVDEC0>, <&cru CLK_RKVDEC0_CORE>,
> +                 <&cru CLK_RKVDEC0_CA>, <&cru CLK_RKVDEC0_HEVC_CA>;
> +        clock-names = "axi", "ahc", "core",
> +                      "cabac", "hevc_cabac";
> +        assigned-clocks = <&cru ACLK_RKVDEC0>, <&cru CLK_RKVDEC0_CORE>,
> +                          <&cru CLK_RKVDEC0_CA>, <&cru CLK_RKVDEC0_HEVC_CA>;
> +        assigned-clock-rates = <800000000>, <600000000>,
> +                               <600000000>, <1000000000>;
> +        power-domains = <&power RK3588_PD_RKVDEC0>;

iommus and resets seem to be missing?

Regards,
Jonas

> +    };
> +
> +...