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Message-ID: <3328a8-669e6400-1-609f7800@94177214>
Date: Mon, 22 Jul 2024 14:53:01 +0100
From: "Shreeya Patel" <shreeya.patel@...labora.com>
To: "Johan Jonker" <jbx6244@...dex.com>
Cc: heiko@...ech.de, mchehab@...nel.org, robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, mturquette@...libre.com, sboyd@...nel.org, p.zabel@...gutronix.de, jose.abreu@...opsys.com, nelson.costa@...opsys.com, shawn.wen@...k-chips.com, nicolas.dufresne@...labora.com, hverkuil@...all.nl, hverkuil-cisco@...all.nl, kernel@...labora.com, linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, "Dmitry Osipenko" <dmitry.osipenko@...labora.com>
Subject: Re: [PATCH v4 2/4] dt-bindings: media: Document bindings for HDMI RX Controller
On Saturday, July 20, 2024 16:14 IST, Johan Jonker <jbx6244@...dex.com> wrote:
Hi Johan,
>
>
> On 7/19/24 14:40, Shreeya Patel wrote:
> > Document bindings for the Synopsys DesignWare HDMI RX Controller.
> >
> > Reviewed-by: Rob Herring <robh@...nel.org>
> > Reviewed-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
> > Signed-off-by: Shreeya Patel <shreeya.patel@...labora.com>
> > ---
> >
> > Changes in v4 :-
> > - No change
> >
> > Changes in v3 :-
> > - Rename hdmirx_cma to hdmi_receiver_cma
> > - Add a Reviewed-by tag
> >
> > Changes in v2 :-
> > - Add a description for the hardware
> > - Rename resets, vo1 grf and HPD properties
> > - Add a proper description for grf and vo1-grf phandles
> > - Rename the HDMI Input node name to hdmi-receiver
> > - Improve the subject line
> > - Include gpio header file in example to fix dt_binding_check failure
> >
> > .../bindings/media/snps,dw-hdmi-rx.yaml | 132 ++++++++++++++++++
> > 1 file changed, 132 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
> > new file mode 100644
> > index 000000000000..96ae1e2d2816
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
> > @@ -0,0 +1,132 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +# Device Tree bindings for Synopsys DesignWare HDMI RX Controller
> > +
> > +---
> > +$id: http://devicetree.org/schemas/media/snps,dw-hdmi-rx.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Synopsys DesignWare HDMI RX Controller
> > +
> > +maintainers:
> > + - Shreeya Patel <shreeya.patel@...labora.com>
> > +
> > +description:
> > + Synopsys DesignWare HDMI Input Controller preset on RK3588 SoCs
> > + allowing devices to receive and decode high-resolution video streams
> > + from external sources like media players, cameras, laptops, etc.
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - const: rockchip,rk3588-hdmirx-ctrler
>
> > + - const: snps,dw-hdmi-rx
>
> 1: Compatible strings must be SoC orientated.
> 2: In Linux there's no priority in which string will probed first.
> What's the point of having a fallback string when there's no common code, but instead only the first string is used?
>
> +static const struct of_device_id hdmirx_id[] = {
> + { .compatible = "rockchip,rk3588-hdmirx-ctrler" },
> + { },
> +};
>
We believe the HDMIRX driver can be used for the Synopsys IP on other SoCs
in the future, which is why we have added snps,dw-hdmi-rx as the fallback compatible.
Currently, we have tested the driver only on the RK3588 Rock5B, so we are using the
rockchip,rk3588-hdmirx-ctrler compatible in the driver instead of the fallback one.
Thanks,
Shreeya Patel
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + maxItems: 3
> > +
> > + interrupt-names:
> > + items:
> > + - const: cec
> > + - const: hdmi
> > + - const: dma
> > +
> > + clocks:
> > + maxItems: 7
> > +
> > + clock-names:
> > + items:
> > + - const: aclk
> > + - const: audio
> > + - const: cr_para
> > + - const: pclk
> > + - const: ref
> > + - const: hclk_s_hdmirx
> > + - const: hclk_vo1
> > +
> > + power-domains:
> > + maxItems: 1
> > +
> > + resets:
> > + maxItems: 4
> > +
> > + reset-names:
> > + items:
> > + - const: axi
> > + - const: apb
> > + - const: ref
> > + - const: biu
> > +
> > + memory-region:
> > + maxItems: 1
> > +
> > + hpd-gpios:
> > + description: GPIO specifier for HPD.
> > + maxItems: 1
> > +
> > + rockchip,grf:
> > + $ref: /schemas/types.yaml#/definitions/phandle
> > + description:
> > + The phandle of the syscon node for the general register file
> > + containing HDMIRX PHY status bits.
> > +
> > + rockchip,vo1-grf:
> > + $ref: /schemas/types.yaml#/definitions/phandle
> > + description:
> > + The phandle of the syscon node for the Video Output GRF register
> > + to enable EDID transfer through SDAIN and SCLIN.
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - interrupt-names
> > + - clocks
> > + - clock-names
> > + - power-domains
> > + - resets
> > + - pinctrl-0
> > + - hpd-gpios
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/rockchip,rk3588-cru.h>
> > + #include <dt-bindings/gpio/gpio.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > + #include <dt-bindings/power/rk3588-power.h>
> > + #include <dt-bindings/reset/rockchip,rk3588-cru.h>
> > + hdmi_receiver: hdmi-receiver@...e0000 {
> > + compatible = "rockchip,rk3588-hdmirx-ctrler", "snps,dw-hdmi-rx";
> > + reg = <0xfdee0000 0x6000>;
> > + interrupts = <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH 0>,
> > + <GIC_SPI 436 IRQ_TYPE_LEVEL_HIGH 0>,
> > + <GIC_SPI 179 IRQ_TYPE_LEVEL_HIGH 0>;
> > + interrupt-names = "cec", "hdmi", "dma";
> > + clocks = <&cru ACLK_HDMIRX>,
> > + <&cru CLK_HDMIRX_AUD>,
> > + <&cru CLK_CR_PARA>,
> > + <&cru PCLK_HDMIRX>,
> > + <&cru CLK_HDMIRX_REF>,
> > + <&cru PCLK_S_HDMIRX>,
> > + <&cru HCLK_VO1>;
> > + clock-names = "aclk",
> > + "audio",
> > + "cr_para",
> > + "pclk",
> > + "ref",
> > + "hclk_s_hdmirx",
> > + "hclk_vo1";
> > + power-domains = <&power RK3588_PD_VO1>;
> > + resets = <&cru SRST_A_HDMIRX>, <&cru SRST_P_HDMIRX>,
> > + <&cru SRST_HDMIRX_REF>, <&cru SRST_A_HDMIRX_BIU>;
> > + reset-names = "axi", "apb", "ref", "biu";
> > + memory-region = <&hdmi_receiver_cma>;
> > + pinctrl-0 = <&hdmim1_rx_cec &hdmim1_rx_hpdin &hdmim1_rx_scl &hdmim1_rx_sda &hdmirx_5v_detection>;
> > + pinctrl-names = "default";
> > + hpd-gpios = <&gpio1 22 GPIO_ACTIVE_LOW>;
> > + };
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