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Tue, 23 Mar 2021 03:31:33 +0000 Message-ID: Subject: Re: [PATCH v6 03/14] dt-bindings: display: bridge: Add i.MX8qm/qxp pixel combiner binding From: Liu Ying To: Marcel Ziswiler , "dri-devel@lists.freedesktop.org" , "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-media@vger.kernel.org" Cc: "narmstrong@baylibre.com" , "linux-imx@nxp.com" , "robert.foss@linaro.org" , "Laurent.pinchart@ideasonboard.com" , "mchehab@kernel.org" , "daniel@ffwll.ch" , "shawnguo@kernel.org" , "vkoul@kernel.org" , "kernel@pengutronix.de" , "s.hauer@pengutronix.de" , "a.hajda@samsung.com" , "robh+dt@kernel.org" , "jonas@kwiboo.se" , "kishon@ti.com" , "airlied@linux.ie" , "festevam@gmail.com" , "lee.jones@linaro.org" , "jernej.skrabec@siol.net" Date: Tue, 23 Mar 2021 11:29:55 +0800 In-Reply-To: References: <1615952569-4711-1-git-send-email-victor.liu@nxp.com> <1615952569-4711-4-git-send-email-victor.liu@nxp.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.4-0ubuntu1 Content-Transfer-Encoding: 7bit X-Originating-IP: [119.31.174.66] X-ClientProxiedBy: HK2PR0401CA0012.apcprd04.prod.outlook.com (2603:1096:202:2::22) To VI1PR04MB3983.eurprd04.prod.outlook.com (2603:10a6:803:4c::16) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from blueberry (119.31.174.66) by HK2PR0401CA0012.apcprd04.prod.outlook.com (2603:1096:202:2::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3955.18 via Frontend Transport; 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(Laurent) > > * Use enum instead of oneOf + const for the reg property of pixel combiner > > channels. (Rob) > > > > .../display/bridge/fsl,imx8qxp-pixel-combiner.yaml | 144 +++++++++++++++++++++ > > 1 file changed, 144 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml > > > > diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml > > b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml > > new file mode 100644 > > index 00000000..50bae21 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml > > @@ -0,0 +1,144 @@ > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > +%YAML 1.2 > > +--- > > +$id: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fdisplay%2Fbridge%2Ffsl%2Cimx8qxp-pixel-combiner.yaml%23&data=04%7C01%7Cvictor.liu%40nxp.com%7Cb83106f0261d4f715b4208d8ed936cb1%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637520564736692120%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=%2B4sZ3C9r3cewzQ01YHOvGk%2FCZaqQgg3ALftZ1dPLKIE%3D&reserved=0 > > +$schema: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=04%7C01%7Cvictor.liu%40nxp.com%7Cb83106f0261d4f715b4208d8ed936cb1%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637520564736692120%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=sP82pZYZXLKhzRRoYPR4C%2FFsDLUka1Fj0%2FA9InuWuvg%3D&reserved=0 > > + > > +title: Freescale i.MX8qm/qxp Pixel Combiner > > + > > +maintainers: > > + - Liu Ying > > + > > +description: | > > + The Freescale i.MX8qm/qxp Pixel Combiner takes two output streams from a > > + single display controller and manipulates the two streams to support a number > > + of modes(bypass, pixel combine, YUV444 to YUV422, split_RGB) configured as > > + either one screen, two screens, or virtual screens. The pixel combiner is > > + also responsible for generating some of the control signals for the pixel link > > + output channel. > > + > > +properties: > > + compatible: > > + enum: > > + - fsl,imx8qm-pixel-combiner > > + - fsl,imx8qxp-pixel-combiner > > + > > + "#address-cells": > > + const: 1 > > + > > + "#size-cells": > > + const: 0 > > + > > + reg: > > + maxItems: 1 > > + > > + clocks: > > + maxItems: 1 > > + > > + clock-names: > > + const: apb > > + > > + power-domains: > > + maxItems: 1 > > + > > +patternProperties: > > + "^channel@[0-1]$": > > + type: object > > + description: Represents a display stream of pixel combiner. > > + > > + properties: > > + "#address-cells": > > + const: 1 > > + > > + "#size-cells": > > + const: 0 > > + > > + reg: > > + description: The display stream index. > > + enum: [ 0, 1 ] > > + > > + port@0: > > + $ref: /schemas/graph.yaml#/properties/port > > + description: Input endpoint of the display stream. > > + > > + port@1: > > + $ref: /schemas/graph.yaml#/properties/port > > + description: Output endpoint of the display stream. > > + > > + required: > > + - "#address-cells" > > + - "#size-cells" > > + - reg > > + - port@0 > > + - port@1 > > + > > + additionalProperties: false > > + > > +required: > > + - compatible > > + - "#address-cells" > > + - "#size-cells" > > + - reg > > + - clocks > > + - clock-names > > + - power-domains > > + > > +additionalProperties: false > > + > > +examples: > > + - | > > + #include > > + #include > > + pixel-combiner@56020000 { > > + compatible = "fsl,imx8qxp-pixel-combiner"; > > + #address-cells = <1>; > > + #size-cells = <0>; > > + reg = <0x56020000 0x10000>; > > + clocks = <&dc0_pixel_combiner_lpcg IMX_LPCG_CLK_4>; > > + clock-names = "apb"; > > + power-domains = <&pd IMX_SC_R_DC_0>; > > + > > + channel@0 { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + reg = <0>; > > + > > + port@0 { > > + reg = <0>; > > + > > + dc0_pixel_combiner_ch0_dc0_dpu_disp0: endpoint { > > + remote-endpoint = <&dc0_dpu_disp0_dc0_pixel_combiner_ch0>; > > While I acknowledge this just being an example you seem to call these as follows elsewhere: > > Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml > > dc0_dpu_disp0_dc0_pixel_combiner_ch0 > pixel_combiner0_ch0_dpu0_disp0 Hmm, just like you said, this is just an example. And, it passes 'make dt_binding_check'. Phandle 'pixel_combiner0_ch0_dpu0_disp0' is used in the example of DPU[1]. It equals to phandle 'dc0_pixel_combiner_ch0_dc0_dpu_disp0' in this pixel combiner example. We'll eventually wire all those endpoints up to form display pipes in real DT files with correct phandles. So, if no objections, I'll keep those phandles as-is in the examples. [1] https://www.spinics.net/lists/arm-kernel/msg878544.html Regards, Liu Ying > > Or am I just missing something? > > > + }; > > + }; > > + > > + port@1 { > > + reg = <1>; > > + > > + dc0_pixel_combiner_ch0_dc0_pixel_link0: endpoint { > > + remote-endpoint = <&dc0_pixel_link0_dc0_pixel_combiner_ch0>; > > + }; > > + }; > > + }; > > + > > + channel@1 { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + reg = <1>; > > + > > + port@0 { > > + reg = <0>; > > + > > + dc0_pixel_combiner_ch1_dc0_dpu_disp1: endpoint { > > + remote-endpoint = <&dc0_dpu_disp1_dc0_pixel_combiner_ch1>; > > ditto > > > + }; > > + }; > > + > > + port@1 { > > + reg = <1>; > > + > > + dc0_pixel_combiner_ch1_dc0_pixel_link1: endpoint { > > + remote-endpoint = <&dc0_pixel_link1_dc0_pixel_combiner_ch1>; > > do. > > > + }; > > + }; > > + }; > > + };