linux-kernel - Re: [PATCH V7 1/2] dt-bindings: display: imx: add binding for i.MX8MP HDMI PVI

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Date: Wed, 10 Jan 2024 13:29:14 -0600
From: Adam Ford <aford173@...il.com>
To: Alexander Stein <alexander.stein@...tq-group.com>
Cc: dri-devel@...ts.freedesktop.org, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
	Conor Dooley <conor.dooley@...rochip.com>, 
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Andrzej Hajda <andrzej.hajda@...el.com>, 
	Fabio Estevam <festevam@...il.com>, Robert Foss <rfoss@...nel.org>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, NXP Linux Team <linux-imx@....com>, devicetree@...r.kernel.org, 
	Conor Dooley <conor+dt@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	Jonas Karlman <jonas@...boo.se>, Liu Ying <victor.liu@....com>, 
	Sascha Hauer <s.hauer@...gutronix.de>, Maxime Ripard <mripard@...nel.org>, 
	Rob Herring <robh+dt@...nel.org>, Pengutronix Kernel Team <kernel@...gutronix.de>, 
	linux-arm-kernel@...ts.infradead.org, 
	Neil Armstrong <neil.armstrong@...aro.org>, linux-kernel@...r.kernel.org, 
	Shawn Guo <shawnguo@...nel.org>
Subject: Re: [PATCH V7 1/2] dt-bindings: display: imx: add binding for i.MX8MP
 HDMI PVI

On Wed, Jan 10, 2024 at 5:48 AM Alexander Stein
<alexander.stein@...tq-group.com> wrote:
>
> Hi Adam,
>
> thanks for pushing this forward.
>
> Am Samstag, 6. Januar 2024, 22:51:44 CET schrieb Adam Ford:
> > From: Lucas Stach <l.stach@...gutronix.de>
> >
> > Add binding for the i.MX8MP HDMI parallel video interface block.
> >
> > Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> > Signed-off-by: Adam Ford <aford173@...il.com>
> > ---
> > V7:  No Change
> >
> > V6:  Add s-o-b message for myself (Adam)
> >
> > V5:  I tried to help move this along, so I took Lucas' patch and
> >      attempted to apply fixes based on feedback.  I don't have
> >      all the history, so apologies for that.
> >      Removed the pipe character from the Description.
> >      Increased the register size from 0x40 to 0x44.
> > diff --git
> > a/Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pvi.yaml
> > b/Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pvi.yaml
> > new file mode 100644
> > index 000000000000..3377f152f319
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/imx/fsl,imx8mp-hdmi-pviyaml
> > @@ -0,0 +1,83 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/imx/fsl,imx8mp-hdmi-pvi.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Freescale i.MX8MP HDMI Parallel Video Interface
> > +
> > +maintainers:
> > +  - Lucas Stach <l.stach@...gutronix.de>
> > +
> > +description:
> > +  The HDMI parallel video interface is a timing and sync generator block in
> > the +  i.MX8MP SoC, that sits between the video source and the HDMI TX
> > controller. +
> > +properties:
> > +  compatible:
> > +    const: fsl,imx8mp-hdmi-pvi
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  ports:
> > +    $ref: /schemas/graph.yaml#/properties/ports
> > +
> > +    properties:
> > +      port@0:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description: Input from the LCDIF controller.
> > +
> > +      port@1:
> > +        $ref: /schemas/graph.yaml#/properties/port
> > +        description: Output to the HDMI TX controller.
> > +
> > +    required:
> > +      - port@0
> > +      - port@1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - power-domains
> > +  - ports
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/power/imx8mp-power.h>
> > +
> > +    display-bridge@...c4000 {
> > +        compatible = "fsl,imx8mp-hdmi-pvi";
> > +        reg = <0x32fc4000 0x44>;
>
> Shall interrupt-parent = <&irqsteer_hdmi>; be added here as well?

That does appear to the case.  Good catch.  The HDMI documentation
isn't as thorough as some other parts of the tech ref manual are.

I'll fix this when I resubmit

adam
>
> Best regards,
> Alexander
>
> > +        interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
> > +        power-domains = <&hdmi_blk_ctrl IMX8MP_HDMIBLK_PD_PVI>;
> > +
> > +        ports {
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +
> > +            port@0 {
> > +                reg = <0>;
> > +                pvi_from_lcdif3: endpoint {
> > +                    remote-endpoint = <&lcdif3_to_pvi>;
> > +                };
> > +            };
> > +
> > +            port@1 {
> > +                reg = <1>;
> > +                pvi_to_hdmi_tx: endpoint {
> > +                    remote-endpoint = <&hdmi_tx_from_pvi>;
> > +                };
> > +            };
> > +        };
> > +    };
>
>
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