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Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by GV2PR04MB11352.eurprd04.prod.outlook.com (2603:10a6:150:2a2::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9228.11; Thu, 16 Oct 2025 02:07:03 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::4609:64af:8a4b:fd64]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::4609:64af:8a4b:fd64%6]) with mapi id 15.20.9228.012; Thu, 16 Oct 2025 02:07:03 +0000 Message-ID: <5c5bb009-3463-4282-946f-3ae93fab11ec@nxp.com> Date: Thu, 16 Oct 2025 10:07:26 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/39] dt-bindings: display: imx: Document i.MX95 Display Controller DomainBlend To: Rob Herring , Marek Vasut Cc: dri-devel@lists.freedesktop.org, Abel Vesa , Conor Dooley , Fabio Estevam , Krzysztof Kozlowski , Laurent Pinchart , Lucas Stach , Peng Fan , Pengutronix Kernel Team , Shawn Guo , Thomas Zimmermann , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org References: <20251011170213.128907-1-marek.vasut@mailbox.org> <20251011170213.128907-2-marek.vasut@mailbox.org> <20251015132442.GA3241958-robh@kernel.org> From: Liu Ying Content-Language: en-US In-Reply-To: <20251015132442.GA3241958-robh@kernel.org> Content-Type: text/plain; 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Document DomainBlend >> block which is specific to i.MX95 and required to get any display >> output on that SoC. >> >> Signed-off-by: Marek Vasut >> --- >> Cc: Abel Vesa >> Cc: Conor Dooley >> Cc: Fabio Estevam >> Cc: Krzysztof Kozlowski >> Cc: Laurent Pinchart >> Cc: Liu Ying >> Cc: Lucas Stach >> Cc: Peng Fan >> Cc: Pengutronix Kernel Team >> Cc: Rob Herring >> Cc: Shawn Guo >> Cc: Thomas Zimmermann >> Cc: devicetree@vger.kernel.org >> Cc: dri-devel@lists.freedesktop.org >> Cc: imx@lists.linux.dev >> Cc: linux-arm-kernel@lists.infradead.org >> Cc: linux-clk@vger.kernel.org >> --- >> .../display/imx/fsl,imx95-dc-domainblend.yaml | 32 +++++++++++++++++++ >> 1 file changed, 32 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx95-dc-domainblend.yaml >> >> diff --git a/Documentation/devicetree/bindings/display/imx/fsl,imx95-dc-domainblend.yaml b/Documentation/devicetree/bindings/display/imx/fsl,imx95-dc-domainblend.yaml >> new file mode 100644 >> index 0000000000000..703f98e3321e8 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/display/imx/fsl,imx95-dc-domainblend.yaml >> @@ -0,0 +1,32 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/display/imx/fsl,imx95-dc-domainblend.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Freescale i.MX95 Display Controller Domain Blend Unit >> + >> +description: Combines two input frames to a single output frame. I'd like to comment on patches in split patch serieses(to be sent if needed). But, since I provide the below interrupt information, anyway I take the chance to comment more: Add more description about the unit according to i.MX95 DC IP spec: The unit operates in four modes: - Primary mode: The primary input is used for output. - Secondary mode: The secondary input is used for output. - Blend mode: Primary and secondary inputs are blended, according to the programmed blending functions. - SidebySide mode: Primary and secondary streams are projected side by side, i.e., primary video on the left side and secondary on the right. BTW, I confirm that two Domain Blend Units exist in i.MX95 DC while they don't exist in i.MX8qxp/qm DCs. And, as you can see, this unit supports multiple modes, this would impact how an OS implements a display driver a lot, especially Blend mode and SidebySide mode. >> + >> +maintainers: >> + - Marek Vasut >> + >> +properties: >> + compatible: >> + const: fsl,imx95-dc-domainblend >> + >> + reg: >> + maxItems: 1 > > No clocks or other resources? As patch 39 shows, there are 3 interrupts - domainblend{0,1}_shdload, domainblend{0,1}_framecomplete and domainblend{0,1}_seqcomplete. > >> + >> +required: >> + - compatible >> + - reg >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + domainblend@4b6a0000 { >> + compatible = "fsl,imx95-dc-domainblend"; >> + reg = <0x4b6a0000 0x10>; >> + }; >> -- >> 2.51.0 >> -- Regards, Liu Ying