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Mon, 15 Jul 2024 15:09:57 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Mon, 15 Jul 2024 15:09:57 -0500 Received: from localhost (uda0496377.dhcp.ti.com [172.24.227.31]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 46FK9uE1034960; Mon, 15 Jul 2024 15:09:57 -0500 From: Aradhya Bhatia To: Tomi Valkeinen , Jyri Sarha , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Laurent Pinchart , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: DRI Development List , Devicetree List , Linux Kernel List , Nishanth Menon , Vignesh Raghavendra , Praneeth Bajjuri , Udit Kumar , Francesco Dolcini , Alexander Sverdlin , Randolph Sapp , Devarsh Thakkar , Jayesh Choudhary , Jai Luthra , Aradhya Bhatia Subject: [PATCH v2 2/4] dt-bindings: display: ti: Add schema for AM625 OLDI Transmitter Date: Tue, 16 Jul 2024 01:39:51 +0530 Message-ID: <20240715200953.1213284-3-a-bhatia1@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240715200953.1213284-1-a-bhatia1@ti.com> References: <20240715200953.1213284-1-a-bhatia1@ti.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 The OLDI (transmitters) TXes do not have registers of their own, and are dependent on the source video-ports from the DSS to provide configuration data. This hardware doesn't directly sit on the internal bus of the SoC, but does so via the DSS. Hence, the OLDI TXes are supposed to be child nodes under the DSS, and not independent devices. Two of the OLDI TXes can function in tandem to output dual-link OLDI output, or cloned single-link outputs. In these cases, one OLDI will be the primary OLDI, and the other one, a companion. The OLDI functionality is further supported by a system-control module, which contains a few registers to control OLDI IO power and characteristics. Add devicetree binding schema for AM625 OLDI TXes. Signed-off-by: Aradhya Bhatia --- .../bindings/display/ti/ti,am625-oldi.yaml | 153 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 154 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml diff --git a/Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml b/Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml new file mode 100644 index 000000000000..0a96e600bc0b --- /dev/null +++ b/Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml @@ -0,0 +1,153 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/ti/ti,am625-oldi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments AM625 OLDI Transmitter + +maintainers: + - Tomi Valkeinen + - Aradhya Bhatia + +description: | + The AM625 TI Keystone OpenLDI transmitter (OLDI TX) supports serialized RGB + pixel data transmission between host and flat panel display over LVDS (Low + Voltage Differential Sampling) interface. The OLDI TX consists of 7-to-1 data + serializers, and 4-data and 1-clock LVDS outputs. It supports the LVDS output + formats "jeida-18", "jeida-24" and "vesa-18", and can accept 24-bit RGB or + padded and un-padded 18-bit RGB bus formats as input. + +properties: + reg: + maxItems: 1 + + clocks: + maxItems: 1 + description: serial clock input for the OLDI transmitters + + clock-names: + const: s_clk + + ti,companion-oldi: + $ref: /schemas/types.yaml#/definitions/phandle + description: + phandle to companion OLDI transmitter. This property is mandatory for the + primarty OLDI TX if the OLDI TXes are expected to work either in dual-lvds + mode or in clone mode. This property should point to the secondary OLDI + TX. + + ti,secondary-oldi: + type: boolean + description: Boolean property to mark an OLDI TX as secondary node. + + ti,oldi-io-ctrl: + $ref: /schemas/types.yaml#/definitions/phandle + description: + phandle to syscon device node mapping OLDI IO_CTRL registers found in the + control MMR region. This property is needed for OLDI interface to work. + + 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: LVDS output port + + required: + - port@0 + - port@1 + +allOf: + - if: + properties: + ti,secondary-oldi: true + then: + properties: + ti,companion-oldi: false + ti,oldi-io-ctrl: false + clocks: false + clock-names: false + + else: + required: + - ti,oldi-io-ctrl + - clocks + - clock-names + +required: + - reg + - ports + +additionalProperties: false + +examples: + - | + #include + + oldi_txes { + #address-cells = <1>; + #size-cells = <0>; + oldi: oldi@0 { + reg = <0>; + clocks = <&k3_clks 186 0>; + clock-names = "s_clk"; + ti,oldi-io-ctrl = <&dss_oldi_io_ctrl>; + ports { + #address-cells = <1>; + #size-cells = <0>; + port@0 { + reg = <0>; + oldi_in: endpoint { + remote-endpoint = <&dpi0_out>; + }; + }; + }; + }; + }; + + - | + #include + + oldi_txes { + #address-cells = <1>; + #size-cells = <0>; + oldi0: oldi@0 { + reg = <0>; + clocks = <&k3_clks 186 0>; + clock-names = "s_clk"; + ti,companion-oldi = <&oldi1>; + ti,oldi-io-ctrl = <&dss_oldi_io_ctrl>; + ports { + #address-cells = <1>; + #size-cells = <0>; + port@0 { + reg = <0>; + oldi0_in: endpoint { + remote-endpoint = <&dpi0_out0>; + }; + }; + }; + }; + oldi1: oldi@1 { + reg = <1>; + ti,secondary-oldi; + ports { + #address-cells = <1>; + #size-cells = <0>; + port@0 { + reg = <0>; + oldi1_in: endpoint { + remote-endpoint = <&dpi0_out1>; + }; + }; + }; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index fb1df8c29f5a..26b1dd3367c5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7642,6 +7642,7 @@ M: Tomi Valkeinen L: dri-devel@lists.freedesktop.org S: Maintained T: git https://gitlab.freedesktop.org/drm/misc/kernel.git +F: Documentation/devicetree/bindings/display/ti/ti,am625-oldi.yaml F: Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml F: Documentation/devicetree/bindings/display/ti/ti,j721e-dss.yaml F: Documentation/devicetree/bindings/display/ti/ti,k2g-dss.yaml