[v4] Enable display support for STM32MP25

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

Posted by Raphael Gallais-Pou 1 month, 1 week ago

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@foss.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@48030000 {
 				status = "disabled";
 			};
 
+			ltdc: display-controller@48010000 {
+				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@480c0000 {
 				compatible = "st,stm32mp25-combophy";
 				reg = <0x480c0000 0x1000>;

-- 
2.25.1

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

Posted by Yannick FERTRE 1 month, 1 week ago

Hi Raphael,

Thanks for the patch.

Acked-by: Yannick Fertre <yannick.fertre@foss.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@foss.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@48030000 {
>   				status = "disabled";
>   			};
>   
> +			ltdc: display-controller@48010000 {
> +				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@480c0000 {
>   				compatible = "st,stm32mp25-combophy";
>   				reg = <0x480c0000 0x1000>;
>

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

Posted by Yannick FERTRE 1 month, 1 week ago

Hi Raphael,

Thanks for the patch.

Acked-by: Yannick Fertre <yannick.fertre@foss.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@foss.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@48030000 {
>   				status = "disabled";
>   			};
>   
> +			ltdc: display-controller@48010000 {
> +				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@480c0000 {
>   				compatible = "st,stm32mp25-combophy";
>   				reg = <0x480c0000 0x1000>;
>