linux-kernel - Re: [PATCH v3 1/4] dt-bindings: media: Add bindings for Imagination E5010 JPEG Encoder driver

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Date:   Sat, 19 Aug 2023 16:00:59 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Devarsh Thakkar <devarsht@...com>, mchehab@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, hverkuil-cisco@...all.nl,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     laurent.pinchart@...asonboard.com, eugen.hristev@...labora.com,
        ezequiel@...guardiasur.com.ar, u.kleine-koenig@...gutronix.de,
        sakari.ailus@...ux.intel.com, praneeth@...com, nm@...com,
        vigneshr@...com, a-bhatia1@...com, j-luthra@...com,
        b-brnich@...com, detheridge@...com, p-mantena@...com, vijayp@...com
Subject: Re: [PATCH v3 1/4] dt-bindings: media: Add bindings for Imagination
 E5010 JPEG Encoder driver

On 16/08/2023 17:22, Devarsh Thakkar wrote:
> Add dt-bindings for Imagination E5010 JPEG Encoder driver which is
> implemented as stateful V4L2 M2M driver.
> 
> Co-developed-by: David Huang <d-huang@...com>
> Signed-off-by: David Huang <d-huang@...com>
> Signed-off-by: Devarsh Thakkar <devarsht@...com>
> ---
> V2: No change
> V3: 
> - Add vendor specific compatible 
> - Fix commit title and message
> - Update reg names
> - Update clocks to 1
> - Fix dts example with proper naming

I do not see improvements in the subject.

> 
>  .../bindings/media/img,e5010-jpeg-enc.yaml    | 81 +++++++++++++++++++
>  MAINTAINERS                                   |  5 ++
>  2 files changed, 86 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/img,e5010-jpeg-enc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/img,e5010-jpeg-enc.yaml b/Documentation/devicetree/bindings/media/img,e5010-jpeg-enc.yaml
> new file mode 100644
> index 000000000000..d105a71ee2ea
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/img,e5010-jpeg-enc.yaml
> @@ -0,0 +1,81 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/img,e5010-jpeg-enc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Imagination E5010 JPEG Encoder
> +
> +maintainers:
> +  - Devarsh Thakkar <devarsht@...com>
> +
> +description: |
> +  The E5010 is a JPEG encoder from Imagination Technologies implemented on
> +  TI's AM62A SoC. It is capable of real time encoding of YUV420 and YUV422
> +  inputs to JPEG and M-JPEG. It supports baseline JPEG Encoding up to
> +  8Kx8K resolution.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - const: ti,e5010-jpeg-enc

TI did not make e5010. Use SoC-based compatible.

> +          - const: img,e5010-jpeg-enc
> +      - const: img,e5010-jpeg-enc

img,e5010-jpeg-enc cannot be compatible with img,e5010-jpeg-enc. It does
not make sense. I guess I did not expect you are going to use what you
wrote in v1 directly... I thought it is just about syntax.

> +
> +  reg:
> +    items:
> +      - description: The E5010 core register region
> +      - description: The E5010 mmu register region
> +
> +  reg-names:
> +    items:
> +      - const: core
> +      - const: mmu
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: core_clk

Drop _clk or even drop clock-names. It brings little benefit for
one-entry list.


Best regards,
Krzysztof