linux-kernel - Re: [PATCH V2 08/10] dt-bindings: media: nxp,imx8mq-vpu: Add support for G1 and G2 on imx8mm

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Date:   Thu, 16 Dec 2021 15:21:18 -0600
From:   Adam Ford <aford173@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-media <linux-media@...r.kernel.org>,
        Abel Vesa <abel.vesa@....com>,
        Adam Ford-BE <aford@...conembedded.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lucas Stach <l.stach@...gutronix.de>,
        "open list:HANTRO VPU CODEC DRIVER" 
        <linux-rockchip@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:STAGING SUBSYSTEM" <linux-staging@...ts.linux.dev>
Subject: Re: [PATCH V2 08/10] dt-bindings: media: nxp,imx8mq-vpu: Add support
 for G1 and G2 on imx8mm

On Thu, Dec 16, 2021 at 3:07 PM Rob Herring <robh@...nel.org> wrote:
>
> On Thu, Dec 16, 2021 at 05:12:53AM -0600, Adam Ford wrote:
> > The i.MX8M mini appears to have a similar G1 and G2 decoder but the
> > post-procesing isn't present, so different compatible flags are requred.
>
> post-processing
>
> > Since all the other parameters are the same with imx8mq, just add
> > the new compatible flags to nxp,imx8mq-vpu.yaml.
> >
> > Signed-off-by: Adam Ford <aford173@...il.com>
> >
> > diff --git a/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml b/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
> > index c1e157251de7..b1f24c48c73b 100644
> > --- a/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
> > +++ b/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
> > @@ -5,7 +5,7 @@
> >  $id: "http://devicetree.org/schemas/media/nxp,imx8mq-vpu.yaml#"
> >  $schema: "http://devicetree.org/meta-schemas/core.yaml#"
> >
> > -title: Hantro G1/G2 VPU codecs implemented on i.MX8MQ SoCs
> > +title: Hantro G1/G2 VPU codecs implemented on i.MX8MQ/i.MX8MM SoCs
>
> Just 'i.MX8' so we don't have to change this everytime?

Are you OK with i.MX8M?  8MQ, 8MM, and 8MP all appear to have G1 and
G2 decoders.  The i.MX8 is different.
>
> >
> >  maintainers:
> >    - Philipp Zabel <p.zabel@...gutronix.de>
> > @@ -20,6 +20,8 @@ properties:
> >          deprecated: true
> >        - const: nxp,imx8mq-vpu-g1
> >        - const: nxp,imx8mq-vpu-g2
> > +      - const: nxp,imx8mm-vpu-g1
> > +      - const: nxp,imx8mm-vpu-g2
>
> Not compatible with the imx8mq variants?

No, the structures associated with these compatible flags telling the
driver what features are available have options for the post-processor
in the 8MQ which are not present in the 8MM.

>
> >
> >    reg:
> >      maxItems: 1
> > @@ -66,3 +68,27 @@ examples:
> >                  clocks = <&clk IMX8MQ_CLK_VPU_G2_ROOT>;
> >                  power-domains = <&vpu_blk_ctrl IMX8MQ_VPUBLK_PD_G2>;
> >          };
> > +  - |
> > +        #include <dt-bindings/clock/imx8mm-clock.h>
> > +        #include <dt-bindings/power/imx8mm-power.h>
> > +        #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > +        vpu_g1: video-codec@...00000 {
> > +                compatible = "nxp,imx8mm-vpu-g1";
> > +                reg = <0x38300000 0x10000>;
> > +                interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
> > +                clocks = <&clk IMX8MM_CLK_VPU_G1_ROOT>;
> > +                power-domains = <&vpu_blk_ctrl IMX8MM_VPUBLK_PD_G1>;
> > +        };
> > +  - |
> > +        #include <dt-bindings/clock/imx8mm-clock.h>
> > +        #include <dt-bindings/power/imx8mm-power.h>
> > +        #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > +        vpu_g2: video-codec@...00000 {
> > +                compatible = "nxp,imx8mm-vpu-g2";
> > +                reg = <0x38310000 0x10000>;
> > +                interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
> > +                clocks = <&clk IMX8MM_CLK_VPU_G2_ROOT>;
> > +                power-domains = <&vpu_blk_ctrl IMX8MM_VPUBLK_PD_G2>;
> > +        };
>
> No point in more examples just for a different compatible.

No problem.
>
> > --
> > 2.32.0
> >
> >