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Message-Id: <20230814132844.113312-5-dario.binacchi@amarulasolutions.com>
Date: Mon, 14 Aug 2023 15:28:44 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: Philippe Cornu <philippe.cornu@...s.st.com>,
michael@...rulasolutions.com,
Amarula patchwork <linux-amarula@...rulasolutions.com>,
Raphael Gallais-Pou <raphael.gallais-pou@...s.st.com>,
Dario Binacchi <dario.binacchi@...rulasolutions.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-stm32@...md-mailman.stormreply.com
Subject: [PATCH v8 4/4] ARM: dts: stm32: support display on stm32f746-disco board
Add support to Rocktech RK043FN48H display on stm32f746-disco board.
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Reviewed-by: Raphaƫl Gallais-Pou <raphael.gallais-pou@...s.st.com>
---
Changes in v8:
- Add the 'power-supply' property to panel-rgb node.
- Move backlight and panel-rgb nodes after the vcc-3v3 node.
Changes in v7:
- Add 'Reviewed-by' tags I forgot in v6.
https://lore.kernel.org/linux-arm-kernel/20230629083726.84910-1-dario.binacchi@amarulasolutions.com/T/
- Add 'Reviewed-by' tag I forgot in v6.
https://lore.kernel.org/linux-arm-kernel/20230629083726.84910-1-dario.binacchi@amarulasolutions.com/T/
Changes in v6:
- Remove dma nodes from stm32f746-disco.dts, they are not used by LTDC,
so there is no need to enable them.
Changes in v5:
I am confident that framebuffer sizing is a real requirement for STM32 boards,
but I need some time to understand if and how to introduce this functionality.
Therefore, I drop the following patches to allow the series to be fully merged:
- [4/6] dt-bindings: display: stm32-ltdc: add optional st,fb-bpp property
- [5/6] ARM: dts: stm32: set framebuffer bit depth on stm32f746-disco
- [6/6] drm/stm: set framebuffer bit depth through DTS property
Changes in v4:
- Use DTS property instead of module parameter to set the framebuffer bit depth.
Changes in v3:
- drop [4/6] dt-bindings: display: simple: add Rocktech RK043FN48H
Applied to https://anongit.freedesktop.org/git/drm/drm-misc.git (drm-misc-next):
https://cgit.freedesktop.org/drm/drm-misc/commit/?id=c42a37a27c777d63961dd634a30f7c887949491a
- drop [5/6] drm/panel: simple: add support for Rocktech RK043FN48H panel
Applied to https://anongit.freedesktop.org/git/drm/drm-misc.git (drm-misc-next)
https://cgit.freedesktop.org/drm/drm-misc/commit/?id=13cdd12a9f934158f4ec817cf048fcb4384aa9dc
arch/arm/boot/dts/st/stm32f746-disco.dts | 44 ++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/arch/arm/boot/dts/st/stm32f746-disco.dts b/arch/arm/boot/dts/st/stm32f746-disco.dts
index 4e785039ba5a..bf91f6b1c0f3 100644
--- a/arch/arm/boot/dts/st/stm32f746-disco.dts
+++ b/arch/arm/boot/dts/st/stm32f746-disco.dts
@@ -60,6 +60,19 @@ memory@...00000 {
reg = <0xC0000000 0x800000>;
};
+ reserved-memory {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ linux,cma {
+ compatible = "shared-dma-pool";
+ no-map;
+ size = <0x80000>;
+ linux,dma-default;
+ };
+ };
+
aliases {
serial0 = &usart1;
};
@@ -85,6 +98,25 @@ vcc_3v3: vcc-3v3 {
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
+
+ backlight: backlight {
+ compatible = "gpio-backlight";
+ gpios = <&gpiok 3 GPIO_ACTIVE_HIGH>;
+ status = "okay";
+ };
+
+ panel_rgb: panel-rgb {
+ compatible = "rocktech,rk043fn48h";
+ power-supply = <&vcc_3v3>;
+ backlight = <&backlight>;
+ enable-gpios = <&gpioi 12 GPIO_ACTIVE_HIGH>;
+ status = "okay";
+ port {
+ panel_in_rgb: endpoint {
+ remote-endpoint = <<dc_out_rgb>;
+ };
+ };
+ };
};
&clk_hse {
@@ -99,6 +131,18 @@ &i2c1 {
status = "okay";
};
+<dc {
+ pinctrl-0 = <<dc_pins_a>;
+ pinctrl-names = "default";
+ status = "okay";
+
+ port {
+ ltdc_out_rgb: endpoint {
+ remote-endpoint = <&panel_in_rgb>;
+ };
+ };
+};
+
&sdio1 {
status = "okay";
vmmc-supply = <&vcc_3v3>;
--
2.34.1
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