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Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by PAXPR04MB8990.eurprd04.prod.outlook.com (2603:10a6:102:20d::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8048.22; Sat, 12 Oct 2024 09:13:50 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::d1ce:ea15:6648:6f90]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::d1ce:ea15:6648:6f90%4]) with mapi id 15.20.8048.020; Sat, 12 Oct 2024 09:13:50 +0000 Message-ID: <07b47f70-5dab-4813-97fa-388a0c0f42e9@nxp.com> Date: Sat, 12 Oct 2024 17:14:13 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 5/9] dt-bindings: display: bridge: Add ITE IT6263 LVDS to HDMI converter To: Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, catalin.marinas@arm.com, will@kernel.org, quic_bjorande@quicinc.com, geert+renesas@glider.be, arnd@arndb.de, nfraprado@collabora.com, o.rempel@pengutronix.de, y.moog@phytec.de, marex@denx.de, isaac.scott@ideasonboard.com, biju.das.jz@bp.renesas.com References: <20241012073543.1388069-1-victor.liu@nxp.com> <20241012073543.1388069-6-victor.liu@nxp.com> <4a7rwguypyaspgr5akpxgw4c45gph4h3lx6nkjv3znn32cldrk@k7qskts7ws73> From: Liu Ying Content-Language: en-US In-Reply-To: <4a7rwguypyaspgr5akpxgw4c45gph4h3lx6nkjv3znn32cldrk@k7qskts7ws73> Content-Type: text/plain; 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(Biju) >> * Simplify ports property by dropping "oneOf". (Rob) >> >> .../bindings/display/bridge/ite,it6263.yaml | 276 ++++++++++++++++++ >> 1 file changed, 276 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml >> >> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml >> new file mode 100644 >> index 000000000000..bc2bbec07623 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6263.yaml >> @@ -0,0 +1,276 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/display/bridge/ite,it6263.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: ITE IT6263 LVDS to HDMI converter >> + >> +maintainers: >> + - Liu Ying >> + >> +description: | >> + The IT6263 is a high-performance single-chip De-SSC(De-Spread Spectrum) LVDS >> + to HDMI converter. Combined with LVDS receiver and HDMI 1.4a transmitter, >> + the IT6263 supports LVDS input and HDMI 1.4 output by conversion function. >> + The built-in LVDS receiver can support single-link and dual-link LVDS inputs, >> + and the built-in HDMI transmitter is fully compliant with HDMI 1.4a/3D, HDCP >> + 1.2 and backward compatible with DVI 1.0 specification. >> + >> + The IT6263 also encodes and transmits up to 8 channels of I2S digital audio, >> + with sampling rate up to 192KHz and sample size up to 24 bits. In addition, >> + an S/PDIF input port takes in compressed audio of up to 192KHz frame rate. >> + >> + The newly supported High-Bit Rate(HBR) audio by HDMI specifications v1.3 is >> + provided by the IT6263 in two interfaces: the four I2S input ports or the >> + S/PDIF input port. With both interfaces the highest possible HBR frame rate >> + is supported at up to 768KHz. >> + >> +properties: > > No LVDS data-mapping support? It is enough to document number of LVDS link data lanes because OS should be able to determine the data-mapping by looking at the number and the data-mapping capability of the other side of the LVDS link. > >> + compatible: >> + const: ite,it6263 >> + >> + reg: >> + maxItems: 1 >> + >> + clocks: >> + maxItems: 1 >> + description: audio master clock >> + >> + clock-names: >> + const: mclk >> + >> + reset-gpios: >> + maxItems: 1 >> + >> + ivdd-supply: >> + description: 1.8V digital logic power >> + >> + ovdd-supply: >> + description: 3.3V I/O pin power >> + >> + txavcc18-supply: >> + description: 1.8V HDMI analog frontend power >> + >> + txavcc33-supply: >> + description: 3.3V HDMI analog frontend power >> + >> + pvcc1-supply: >> + description: 1.8V HDMI frontend core PLL power >> + >> + pvcc2-supply: >> + description: 1.8V HDMI frontend filter PLL power >> + >> + avcc-supply: >> + description: 3.3V LVDS frontend power >> + >> + anvdd-supply: >> + description: 1.8V LVDS frontend analog power >> + >> + apvdd-supply: >> + description: 1.8V LVDS frontend PLL power >> + >> + "#sound-dai-cells": >> + const: 0 >> + >> + ite,lvds-link-num-data-lanes: >> + $ref: /schemas/types.yaml#/definitions/uint8 >> + enum: [3, 4, 5] >> + description: number of data lanes per LVDS link > > Please use data-lanes property inside the OF graph. In both port@0 and port@1? > >> + >> + ite,i2s-audio-fifo-sources: >> + $ref: /schemas/types.yaml#/definitions/uint32-array >> + minItems: 1 >> + maxItems: 4 >> + items: >> + enum: [0, 1, 2, 3] >> + description: >> + Each array element indicates the pin number of an I2S serial data input >> + line which is connected to an audio FIFO, from audio FIFO0 to FIFO3. > > What does that mean from the board point of view? Routed audio links for > the multichannel audio? Yes, also for single channel audio. > >> + >> + ite,rl-channel-swap-audio-sources: >> + $ref: /schemas/types.yaml#/definitions/uint32-array >> + minItems: 1 >> + maxItems: 4 >> + uniqueItems: true >> + items: >> + enum: [0, 1, 2, 3] >> + description: >> + Each array element indicates an audio source whose right channel and left >> + channel are swapped by this converter. For I2S, the element is the pin >> + number of an I2S serial data input line. For S/PDIF, the element is always >> + 0. > > Why? Because this converter has the capability to swap right channel and left channel and S/PDIF always uses audio source0. > >> + >> + ports: >> + $ref: /schemas/graph.yaml#/properties/ports >> + >> + properties: >> + port@0: >> + $ref: /schemas/graph.yaml#/$defs/port-base >> + unevaluatedProperties: false >> + description: >> + The first LVDS input link. >> + In dual-link LVDS mode, this link works together with the second LVDS >> + input link, and one link receives odd pixels while the other receives >> + even pixels. Specify the pixels with one of the dual-lvds-odd-pixels >> + and dual-lvds-even-pixels properties when and only when dual-link LVDS >> + mode is used. >> + >> + properties: >> + dual-lvds-odd-pixels: >> + type: boolean >> + description: the first sink port for odd pixels >> + >> + dual-lvds-even-pixels: >> + type: boolean >> + description: the first sink port for even pixels >> + >> + port@1: >> + $ref: /schemas/graph.yaml#/$defs/port-base >> + unevaluatedProperties: false >> + description: the second LVDS input link >> + >> + properties: >> + dual-lvds-even-pixels: >> + type: boolean >> + description: the second sink port for even pixels >> + >> + dual-lvds-odd-pixels: >> + type: boolean >> + description: the second sink port for odd pixels >> + >> + oneOf: >> + - required: [dual-lvds-even-pixels] >> + - required: [dual-lvds-odd-pixels] > > This still allows one to specify that both ports provide odd pixels. Is > that expected? Also why do you need two properties which specify the > same option. No, that is not expected. Description for port@0 already mentions one link receives odd pixels while the other receives even pixels. Two options are supported for dual-link LVDS, not the same option: 1) LVDS link1(port@0) gets odd pixels and LVDS link2(port@1) gets even pixels. 2) LVDS link1(port@0) gets even pixels and LVDS link2(port@1) gets odd pixels. That's the reason why each port needs two properties to define odd/even pixels. > > My suggestion would be to add a single root-level property which > specifies which port provides even pixel data. That won't work. The LVDS source side expects the ports of the sink side specify dual-lvds-{odd,even}-pixels properties. > >> + >> + port@2: >> + $ref: /schemas/graph.yaml#/properties/port >> + description: video port for the HDMI output >> + >> + port@3: >> + $ref: /schemas/graph.yaml#/properties/port >> + description: sound input port >> + >> + required: >> + - port@0 >> + - port@2 >> + >> +required: >> + - compatible >> + - reg >> + - ivdd-supply >> + - ovdd-supply >> + - txavcc18-supply >> + - txavcc33-supply >> + - pvcc1-supply >> + - pvcc2-supply >> + - avcc-supply >> + - anvdd-supply >> + - apvdd-supply >> + - ite,lvds-link-num-data-lanes >> + - ports >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + /* single-link LVDS input */ >> + #include >> + >> + i2c { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + hdmi@4c { >> + compatible = "ite,it6263"; >> + reg = <0x4c>; >> + reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; >> + ivdd-supply = <®_buck5>; >> + ovdd-supply = <®_vext_3v3>; >> + txavcc18-supply = <®_buck5>; >> + txavcc33-supply = <®_vext_3v3>; >> + pvcc1-supply = <®_buck5>; >> + pvcc2-supply = <®_buck5>; >> + avcc-supply = <®_vext_3v3>; >> + anvdd-supply = <®_buck5>; >> + apvdd-supply = <®_buck5>; >> + ite,lvds-link-num-data-lanes = /bits/ 8 <4>; >> + >> + ports { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + port@0 { >> + reg = <0>; >> + >> + it6263_lvds_link1: endpoint { >> + remote-endpoint = <&ldb_lvds_ch0>; >> + }; >> + }; >> + >> + port@2 { >> + reg = <2>; >> + >> + it6263_out: endpoint { >> + remote-endpoint = <&hdmi_in>; >> + }; >> + }; >> + }; >> + }; >> + }; >> + >> + - | >> + /* dual-link LVDS input */ >> + #include >> + >> + i2c { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + hdmi@4c { >> + compatible = "ite,it6263"; >> + reg = <0x4c>; >> + reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; >> + ivdd-supply = <®_buck5>; >> + ovdd-supply = <®_vext_3v3>; >> + txavcc18-supply = <®_buck5>; >> + txavcc33-supply = <®_vext_3v3>; >> + pvcc1-supply = <®_buck5>; >> + pvcc2-supply = <®_buck5>; >> + avcc-supply = <®_vext_3v3>; >> + anvdd-supply = <®_buck5>; >> + apvdd-supply = <®_buck5>; >> + ite,lvds-link-num-data-lanes = /bits/ 8 <4>; >> + >> + ports { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + port@0 { >> + reg = <0>; >> + dual-lvds-odd-pixels; >> + >> + it6263_lvds_link1_dual: endpoint { >> + remote-endpoint = <&ldb_lvds_ch0>; >> + }; >> + }; >> + >> + port@1 { >> + reg = <1>; >> + dual-lvds-even-pixels; >> + >> + it6263_lvds_link2_dual: endpoint { >> + remote-endpoint = <&ldb_lvds_ch1>; >> + }; >> + }; >> + >> + port@2 { >> + reg = <2>; >> + >> + it6263_out_dual: endpoint { >> + remote-endpoint = <&hdmi_in>; >> + }; >> + }; >> + }; >> + }; >> + }; >> -- >> 2.34.1 >> > -- Regards, Liu Ying