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Thu, 22 Oct 2026 06:23:43 -0700 (PDT) Received: from xeon ([188.163.112.62]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b40313074esm1818061a12.27.2026.10.22.06.23.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Oct 2026 06:23:42 -0700 (PDT) From: Svyatoslav Ryhel To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , Jonathan Hunter , Mikko Perttunen , Svyatoslav Ryhel Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v4 6/7] dt-bindings: display: tegra: Document 8-bit CPU parallel interface Date: Thu, 22 Oct 2026 16:22:58 +0300 Message-ID: <20261022132259.240717-7-clamor95@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261022132259.240717-1-clamor95@gmail.com> References: <20261022132259.240717-1-clamor95@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Document 8-bit CPU parallel MIPI DBI Type B interface provided by Tegra20/30 SoCs display controller. Reviewed-by: Rob Herring (Arm) Signed-off-by: Svyatoslav Ryhel --- .../display/tegra/nvidia,tegra20-dbi.yaml | 108 ++++++++++++++++++ .../display/tegra/nvidia,tegra20-dc.yaml | 15 +++ 2 files changed, 123 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dbi.yaml diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dbi.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dbi.yaml new file mode 100644 index 0000000000000..6b4fd20c5817c --- /dev/null +++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dbi.yaml @@ -0,0 +1,108 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/tegra/nvidia,tegra20-dbi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Nvidia Tegra Display Controller based MIPI DBI Type B interface + +maintainers: + - Svyatoslav Ryhel + +description: The display controller in Tegra20/30 SoCs features an + 8-bit SPI interface that closely resembles the MIPI DBI Type B + protocol and is referred to as '8-bit CPU'. Each display controller + provides two such interfaces, which can be used to send MIPI DCS + commands to initialize and control the panel while image data is + transmitted via 16/18/24-line RGB. + +properties: + nvidia,index: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Number of DBI interface used 0 - primary, 1 - secondary. If + property is not set, primary will be used. + enum: [ 0, 1 ] + + panel: + type: object + description: Node of supported panel driven by the bridge. + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + description: Video port for RGB input. + + properties: + endpoint: + $ref: /schemas/graph.yaml#/$defs/endpoint-base + unevaluatedProperties: false + + properties: + bus-width: + enum: [ 16, 18, 24 ] + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: Video port for DBI output (panel or connector). + + required: + - port@0 + - port@1 + +required: + - panel + - ports + +unevaluatedProperties: false + +examples: + - | + #include + + dbi { + nvidia,index = <0>; + + panel { + compatible = "hit,tx10d07vm0baa"; + + reset-gpios = <&gpio 175 GPIO_ACTIVE_LOW>; + + avci-supply = <&vcc_2v8_lcd>; + iovcc-supply = <&iovcc_1v8_lcd>; + + backlight = <&backlight>; + + port { + panel_input: endpoint { + remote-endpoint = <&bridge_output>; + }; + }; + }; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + bridge_input: endpoint { + remote-endpoint = <&dpi_output>; + bus-width = <24>; + }; + }; + + port@1 { + reg = <1>; + + bridge_output: endpoint { + remote-endpoint = <&panel_input>; + }; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml index 69be95afd5627..a014bf0dd508d 100644 --- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml +++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml @@ -76,6 +76,9 @@ properties: $ref: /schemas/types.yaml#/definitions/phandle-array description: A list of phandles of outputs that this display controller can drive. + dbi: + $ref: /schemas/display/tegra/nvidia,tegra20-dbi.yaml# + rgb: type: object @@ -155,6 +158,18 @@ allOf: - const: wind - const: wint + - if: + properties: + compatible: + contains: + enum: + - nvidia,tegra114-dc + - nvidia,tegra124-dc + - nvidia,tegra210-dc + then: + properties: + dbi: false + additionalProperties: false required: -- 2.53.0