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Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by GVXPR04MB10777.eurprd04.prod.outlook.com (2603:10a6:150:227::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8048.26; Tue, 15 Oct 2024 06:27:37 +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; Tue, 15 Oct 2024 06:27:36 +0000 Message-ID: Date: Tue, 15 Oct 2024 14:28:01 +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> <07b47f70-5dab-4813-97fa-388a0c0f42e9@nxp.com> <90e0c4ac-1636-4936-ba40-2f7693bc6b32@nxp.com> From: Liu Ying Content-Language: en-US In-Reply-To: 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. >>> >>> From what I can see, data-mapping is specified on the consumer sink side >>> of the LVDS link. This means it should go to the bridge's device node. >> >> Then, I won't define data-lanes, because data-mapping implies it, >> e.g., jeida-24 implies data lanes 0/1/2/3, see lvds-data-mapping.yaml. >> >> Please let me know which one you prefer. > > I'd prefer data-mapping. Before I go ahead to use it, I'd like to get confirmation that it'll cover data mapping which supports 30-bit RGB pixel transmission, because it is something supported by IT6263 as I mentioned in v1 dt-binding discussion. For now, data-mapping only supports jeida-18, jeida-24 and vesa-24, see lvds-data-mapping.yaml. And, I'm not sure the 30-bit data mappings specified in IT6263 datasheet are standard or not. Note that if we use data-lanes instead, then this is not a concern from DT PoV, as data mapping can be inferred by OS. -- Regards, Liu Ying