linux-kernel - Re: [PATCH v4 1/3] dt-bindings: display: vop2: Add VP clock resets

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <5453371.fEcJ0Lxnt5@diego>
Date: Sun, 06 Jul 2025 12:23:26 +0200
From: Heiko Stübner <heiko@...ech.de>
To: linux-kernel@...r.kernel.org,
 Detlev Casanova <detlev.casanova@...labora.com>
Cc: Sandy Huang <hjc@...k-chips.com>, Andy Yan <andy.yan@...k-chips.com>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Heiko Stuebner <heiko.stuebner@...rry.de>,
 Sebastian Reichel <sebastian.reichel@...labora.com>,
 Dragan Simic <dsimic@...jaro.org>, Alexey Charkov <alchark@...il.com>,
 Jianfeng Liu <liujianfeng1994@...il.com>,
 Cristian Ciocaltea <cristian.ciocaltea@...labora.com>,
 dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 kernel@...labora.com, Detlev Casanova <detlev.casanova@...labora.com>,
 Conor Dooley <conor.dooley@...rochip.com>
Subject: Re: [PATCH v4 1/3] dt-bindings: display: vop2: Add VP clock resets

Am Freitag, 15. November 2024, 17:20:40 Mitteleuropäische Sommerzeit schrieb Detlev Casanova:
> Add the documentation for VOP2 video ports reset clocks.
> One reset can be set per video port.
> 
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> Signed-off-by: Detlev Casanova <detlev.casanova@...labora.com>
> ---
>  .../display/rockchip/rockchip-vop2.yaml       | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
> index 2531726af306b..5b59d91de47bd 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip-vop2.yaml
> @@ -65,6 +65,26 @@ properties:
>        - const: dclk_vp3
>        - const: pclk_vop
>  
> +  resets:
> +    minItems: 5
> +    items:
> +      - description: AXI clock reset.
> +      - description: AHB clock reset.
> +      - description: Pixel clock reset for video port 0.
> +      - description: Pixel clock reset for video port 1.
> +      - description: Pixel clock reset for video port 2.
> +      - description: Pixel clock reset for video port 3.
> +
> +  reset-names:
> +    minItems: 5
> +    items:
> +      - const: aclk
> +      - const: hclk

the vop1 uses "axi" and "ahb" (and "dclk") for these reset names.

The vendor vop2 code also uses that name in comments, like
/*
 * Reset AXI to get a clean state, which is conducive to recovering
 * from exceptions when enable at next time(such as iommu page fault)
 */

So for these two we're not resetting clocks, but the parts of the
vop2 ... so I'd strongly wish for matching names for the vop2 :-)

Thanks
Heiko



> +      - const: dclk_vp0
> +      - const: dclk_vp1
> +      - const: dclk_vp2
> +      - const: dclk_vp3
> +
>    rockchip,grf:
>      $ref: /schemas/types.yaml#/definitions/phandle
>      description:
> @@ -128,6 +148,11 @@ allOf:
>          clock-names:
>            minItems: 7
>  
> +        resets:
> +          minItems: 6
> +        reset-names:
> +          minItems: 6
> +
>          ports:
>            required:
>              - port@0
> @@ -152,6 +177,11 @@ allOf:
>          clock-names:
>            maxItems: 5
>  
> +        resets:
> +          maxItems: 5
> +        reset-names:
> +          maxItems: 5
> +
>          ports:
>            required:
>              - port@0
> @@ -183,6 +213,16 @@ examples:
>                                "dclk_vp0",
>                                "dclk_vp1",
>                                "dclk_vp2";
> +                resets = <&cru SRST_A_VOP>,
> +                         <&cru SRST_H_VOP>,
> +                         <&cru SRST_VOP0>,
> +                         <&cru SRST_VOP1>,
> +                         <&cru SRST_VOP2>;
> +                reset-names = "aclk",
> +                              "hclk",
> +                              "dclk_vp0",
> +                              "dclk_vp1",
> +                              "dclk_vp2";
>                  power-domains = <&power RK3568_PD_VO>;
>                  iommus = <&vop_mmu>;
>                  vop_out: ports {
>