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Date: Fri, 16 Feb 2024 10:05:26 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: linux-arm-kernel@...ts.infradead.org, dri-devel@...ts.freedesktop.org
Cc: marex@...x.de, frieder.schrempf@...tron.de, Lucas Stach <l.stach@...gutronix.de>, Adam Ford <aford173@...il.com>, Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...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>, Philipp Zabel <p.zabel@...gutronix.de>, Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Liu Ying <victor.liu@....com>, Ulf Hansson <ulf.hansson@...aro.org>, dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org, linux-pm@...r.kernel.org, Adam Ford <aford173@...il.com>
Subject: Re: [PATCH V8 09/12] dt-bindings: display: imx: add binding for i.MX8MP HDMI TX
Hi all,
Am Samstag, 3. Februar 2024, 17:52:49 CET schrieb Adam Ford:
> From: Lucas Stach <l.stach@...gutronix.de>
>
> The HDMI TX controller on the i.MX8MP SoC is a Synopsys designware IP
> core with a little bit of SoC integration around it.
>
> Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
> Signed-off-by: Adam Ford <aford173@...il.com>
>
> ---
> V3: Change name and location to better idenfity as a bridge and
> HDMI 2.0a transmitter
>
> Fix typos and feedback from Rob and added ports.
> ---
> .../display/bridge/fsl,imx8mp-hdmi-tx.yaml | 102 ++++++++++++++++++
> 1 file changed, 102 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/display/bridge/fsl,imx8mp-hdmi-tx.yaml
>
> diff --git
> a/Documentation/devicetree/bindings/display/bridge/fsl,imx8mp-hdmi-tx.yaml
> b/Documentation/devicetree/bindings/display/bridge/fsl,imx8mp-hdmi-tx.yaml
> new file mode 100644
> index 000000000000..3791c9f4ebab
> --- /dev/null
> +++
> b/Documentation/devicetree/bindings/display/bridge/fsl,imx8mp-hdmi-tx.yaml
> @@ -0,0 +1,102 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/fsl,imx8mp-hdmi-tx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MX8MP DWC HDMI TX Encoder
> +
> +maintainers:
> + - Lucas Stach <l.stach@...gutronix.de>
> +
> +description:
> + The i.MX8MP HDMI transmitter is a Synopsys DesignWare
> + HDMI 2.0a TX controller IP.
> +
> +allOf:
> + - $ref: /schemas/display/bridge/synopsys,dw-hdmi.yaml#
> +
> +properties:
> + compatible:
> + enum:
> + - fsl,imx8mp-hdmi-tx
> +
> + reg-io-width:
> + const: 1
> +
> + clocks:
> + maxItems: 4
> +
> + clock-names:
> + items:
> + - const: iahb
> + - const: isfr
> + - const: cec
> + - const: pix
> +
> + power-domains:
> + maxItems: 1
> +
> + ports:
> + $ref: /schemas/graph.yaml#/properties/ports
> +
> + properties:
> + port@0:
> + $ref: /schemas/graph.yaml#/properties/port
> + description: Parallel RGB input port
> +
> + port@1:
> + $ref: /schemas/graph.yaml#/properties/port
> + description: HDMI output port
> +
> + required:
> + - port@0
> + - port@1
Is this really correct that port@1 is required? AFAICS this host already
supports HPD and DDC by itself, so there is no need for a dedicated HDMI
connector.
With the current state of the drivers this output port is completely ignored
anyway. Yet it works for a lot of people.
Best regards,
Alexander
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - interrupts
> + - power-domains
> + - ports
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/imx8mp-clock.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/power/imx8mp-power.h>
> +
> + hdmi@...d8000 {
> + compatible = "fsl,imx8mp-hdmi-tx";
> + reg = <0x32fd8000 0x7eff>;
> + interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&clk IMX8MP_CLK_HDMI_APB>,
> + <&clk IMX8MP_CLK_HDMI_REF_266M>,
> + <&clk IMX8MP_CLK_32K>,
> + <&hdmi_tx_phy>;
> + clock-names = "iahb", "isfr", "cec", "pix";
> + power-domains = <&hdmi_blk_ctrl IMX8MP_HDMIBLK_PD_HDMI_TX>;
> + reg-io-width = <1>;
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port@0 {
> + reg = <0>;
> +
> + hdmi_tx_from_pvi: endpoint {
> + remote-endpoint = <&pvi_to_hdmi_tx>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> + hdmi_tx_out: endpoint {
> + remote-endpoint = <&hdmi0_con>;
> + };
> + };
> + };
> + };
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