[PATCH v6 12/42] dt-bindings: display: mediatek: Add binding for MT8195 HDMI-TX v2

AngeloGioacchino Del Regno
2025-02-11T11:34:39Z

Add a binding for the HDMI TX v2 Encoder found in MediaTek MT8195
and MT8188 SoCs.

This fully supports the HDMI Specification 2.0b, hence it provides
support for 3D-HDMI, Polarity inversion, up to 16 bits Deep Color,
color spaces including RGB444, YCBCR420/422/444 (ITU601/ITU709) and
xvYCC, with output resolutions up to 3840x2160p@60Hz.

Moreover, it also supports HDCP 1.4 and 2.3, Variable Refresh Rate
(VRR) and Consumer Electronics Control (CEC).

This IP also includes support for HDMI Audio, including IEC60958
and IEC61937 SPDIF, 8-channel PCM, DSD, and other lossless audio
according to HDMI 2.0.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
.../mediatek/mediatek,mt8195-hdmi.yaml | 151 ++++++++++++++++++
1 file changed, 151 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi.yaml

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi.yaml
new file mode 100644
index 000000000000..1b382f99d3ce
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi.yaml
@@ -0,0 +1,151 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/mediatek/mediatek,mt8195-hdmi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT8195 series HDMI-TX Encoder
+
+maintainers:
+ - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ - CK Hu <ck.hu@mediatek.com>
+
+description:
+ The MediaTek HDMI-TX v2 encoder can generate HDMI format data based on
+ the HDMI Specification 2.0b.
+
+properties:
+ compatible:
+ enum:
+ - mediatek,mt8188-hdmi-tx
+ - mediatek,mt8195-hdmi-tx
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: HDMI Peripheral Bus (APB) clock
+ - description: HDCP and HDMI_TOP clock
+ - description: HDCP, HDMI_TOP and HDMI Audio reference clock
+ - description: VPP HDMI Split clock
+
+ clock-names:
+ items:
+ - const: bus
+ - const: hdcp
+ - const: hdcp24m
+ - const: hdmi-split
+
+ i2c:
+ type: object
+ $ref: /schemas/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml
+ unevaluatedProperties: false
+ description: HDMI DDC I2C controller
+
+ phys:
+ maxItems: 1
+ description: PHY providing clocking TMDS and pixel to controller
+
+ phy-names:
+ items:
+ - const: hdmi
+
+ power-domains:
+ maxItems: 1
+
+ '#sound-dai-cells':
+ const: 1
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port@0:
+ $ref: /schemas/graph.yaml#/properties/port
+ description:
+ Input port, usually connected to the output port of a DPI
+
+ port@1:
+ $ref: /schemas/graph.yaml#/properties/port
+ description:
+ Output port that must be connected either to the input port of
+ a HDMI connector node containing a ddc-i2c-bus, or to the input
+ port of an attached bridge chip, such as a SlimPort transmitter.
+
+ required:
+ - port@0
+ - port@1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - power-domains
+ - phys
+ - phy-names
+ - ports
+
+allOf:
+ - $ref: /schemas/sound/dai-common.yaml#
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/mt8195-clk.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/power/mt8195-power.h>
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ hdmi@1c300000 {
+ compatible = "mediatek,mt8195-hdmi-tx";
+ reg = <0 0x1c300000 0 0x1000>;
+ clocks = <&topckgen CLK_TOP_HDMI_APB>,
+ <&topckgen CLK_TOP_HDCP>,
+ <&topckgen CLK_TOP_HDCP_24M>,
+ <&vppsys1 CLK_VPP1_VPP_SPLIT_HDMI>;
+ clock-names = "bus", "hdcp", "hdcp24m", "hdmi-split";
+ interrupts = <GIC_SPI 677 IRQ_TYPE_LEVEL_HIGH 0>;
+ phys = <&hdmi_phy>;
+ phy-names = "hdmi";
+ power-domains = <&spm MT8195_POWER_DOMAIN_HDMI_TX>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&hdmi_pins>;
+ #sound-dai-cells = <1>;
+
+ hdmitx_ddc: i2c {
+ compatible = "mediatek,mt8195-hdmi-ddc";
+ clocks = <&clk26m>;
+ };
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ hdmi_in: endpoint {
+ remote-endpoint = <&dpi1_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ hdmi_out: endpoint {
+ remote-endpoint = <&hdmi_connector_in>;
+ };
+ };
+ };
+ };
+ };
--
2.48.1