linux-kernel - Re: [PATCH v4 09/13] arm64: dts: st: add ltdc support on stm32mp251

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Message-ID: <03b4732e-1545-470a-b6ce-bda68c7477d4@foss.st.com>
Date: Fri, 22 Aug 2025 14:59:01 +0200
From: Yannick FERTRE <yannick.fertre@...s.st.com>
To: Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>,
        Philippe Cornu
	<philippe.cornu@...s.st.com>,
        Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Rob Herring <robh@...nel.org>,
        "Krzysztof
 Kozlowski" <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        "Maxime
 Coquelin" <mcoquelin.stm32@...il.com>,
        Alexandre Torgue
	<alexandre.torgue@...s.st.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Christophe Roullier
	<christophe.roullier@...s.st.com>
CC: <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 09/13] arm64: dts: st: add ltdc support on stm32mp251

Hi Raphael,

Thanks for the patch.

Acked-by: Yannick Fertre <yannick.fertre@...s.st.com>

Le 21/08/2025 à 13:08, Raphael Gallais-Pou a écrit :
> The LCD-TFT Display Controller (LTDC) handles display composition,
> scaling and rotation.  It provides a parallel digital RGB flow to be
> used by display interfaces.
>
> Add the LTDC node.
>
> Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>
> ---
>   arch/arm64/boot/dts/st/stm32mp251.dtsi | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> index 303abf915b8e489671b51a8c832041c14a42ecb8..372a99d9cc5c3730e8fbeddeb6134a3b18d938b6 100644
> --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
> +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> @@ -1576,6 +1576,18 @@ dcmipp: dcmipp@...30000 {
>   				status = "disabled";
>   			};
>   
> +			ltdc: display-controller@...10000 {
> +				compatible = "st,stm32mp251-ltdc";
> +				reg = <0x48010000 0x400>;
> +				interrupts = <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>,
> +					<GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>;
> +				clocks = <&rcc CK_KER_LTDC>, <&rcc CK_BUS_LTDC>;
> +				clock-names = "lcd", "bus";
> +				resets = <&rcc LTDC_R>;
> +				access-controllers = <&rifsc 80>;
> +				status = "disabled";
> +			};
> +
>   			combophy: phy@...c0000 {
>   				compatible = "st,stm32mp25-combophy";
>   				reg = <0x480c0000 0x1000>;
>