linux-kernel - Re: [PATCH v5 2/3] dt-bindings: display: Fix brcm,bcm2835-hvs bindings for BCM2712

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Message-ID: <874d26cf-af3d-4d24-860e-72573920da27@kernel.org>
Date: Sun, 22 Dec 2024 09:39:18 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Dave Stevenson <dave.stevenson@...pberrypi.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Florian Fainelli <florian.fainelli@...adcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Eric Anholt <eric@...olt.net>,
 Maíra Canal <mcanal@...lia.com>,
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
 Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
 Doug Berger <opendmb@...il.com>, Linus Walleij <linus.walleij@...aro.org>,
 Bartosz Golaszewski <brgl@...ev.pl>, Thomas Gleixner <tglx@...utronix.de>,
 Stefan Wahren <wahrenst@....net>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-rpi-kernel@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>,
 linux-gpio@...r.kernel.org
Subject: Re: [PATCH v5 2/3] dt-bindings: display: Fix brcm,bcm2835-hvs
 bindings for BCM2712

On 20/12/2024 19:11, Dave Stevenson wrote:
> Commit 6cfcbe548a3a ("dt-bindings: display: Add BCM2712 HVS bindings")
> added the compatible string for BCM2712, but missed out that
> the number of interrupts and clocks changed too.
> 
> The driver commit adding support for BCM2712 [1] also requires that

The driver commit foo ("bar") ... BCM2712 also requires...



> both interrupts and clocks are named, so the relevant -names
> properties are also added to "required" for BCM2712.
> 
> Update to validate clock, interrupts, and their names for the BCM2712
> variant. (There should be no change in the binding requirements for
> the other variants).
> 
> [1] Commit 7687a12153d3 ("drm/vc4: hvs: Add support for BCM2712 HVS")

And drop this.

> 
> Fixes: 6cfcbe548a3a ("dt-bindings: display: Add BCM2712 HVS bindings")
> Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
> ---
>  .../bindings/display/brcm,bcm2835-hvs.yaml         | 88 ++++++++++++++++++----
>  1 file changed, 74 insertions(+), 14 deletions(-)
> 


...

> +      properties:
> +        compatible:
> +          contains:
> +            const: brcm,bcm2711-hvs
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: Core Clock
> +        interrupts:
> +          maxItems: 1
> +        clock-names: false
> +        interrupt-names: false
> +
> +      required:
> +        - clocks
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: brcm,bcm2712-hvs
> +
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 2
> +          maxItems: 2
> +        clock-names:
> +          items:
> +            - const: core
> +            - const: disp
> +        interrupts:
> +          items:
> +            - description: Channel 0 End of frame
> +            - description: Channel 1 End of frame
> +            - description: Channel 2 End of frame
> +        interrupt-names:
> +          items:
> +            - const: ch0-eof
> +            - const: ch1-eof
> +            - const: ch2-eof
> +      required:
> +        - clocks
> +        - clock-names
> +        - interrupt-names
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: brcm,bcm2835-hvs
> +
> +    then:
> +      properties:

What about clocks here? Why isn't this a part of block with bcm2711 (as
enum)?

> +        interrupts:
> +          maxItems: 1
> +        clock-names: false
> +        interrupt-names: false
>  
>  examples:
>    - |
> 


Best regards,
Krzysztof