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20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
61 lines
1.9 KiB
Diff
61 lines
1.9 KiB
Diff
From 97a59d460244efdb87b464b9f07c1e90e7e7129a Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Fri, 7 Jan 2022 11:12:08 +0000
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Subject: [PATCH] dtoverlays: Add backlight-gpio parameter to
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vc4-kms-dpi-generic
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To allow for the cases where a simple panel does have a GPIO
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controlled backlight. Defaults to having no backlight defined.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/README | 2 ++
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.../overlays/vc4-kms-dpi-generic-overlay.dts | 19 +++++++++++++++++++
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2 files changed, 21 insertions(+)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -3638,6 +3638,8 @@ Params: clock-frequency Display
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rgb888 Change to RGB888 output on GPIOs 0-27
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bus-format Override the bus format for a MEDIA_BUS_FMT_*
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value. NB also overridden by rgbXXX overrides.
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+ backlight-gpio Defines a GPIO to be used for backlight control
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+ (default of none).
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Name: vc4-kms-dsi-7inch
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--- a/arch/arm/boot/dts/overlays/vc4-kms-dpi-generic-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/vc4-kms-dpi-generic-overlay.dts
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@@ -63,6 +63,23 @@
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};
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};
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+ fragment@2 {
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+ target = <&panel>;
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+ __dormant__ {
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+ backlight = <&backlight>;
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+ };
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+ };
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+
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+ fragment@3 {
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+ target-path = "/";
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+ __dormant__ {
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+ backlight: backlight {
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+ compatible = "gpio-backlight";
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+ gpios = <&gpio 255 GPIO_ACTIVE_HIGH>;
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+ };
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+ };
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+ };
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+
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__overrides__ {
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clock-frequency = <&timing>, "clock-frequency:0";
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hactive = <&timing>, "hactive:0";
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@@ -88,5 +105,7 @@
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rgb888 = <&panel>, "bus-format:0=0x100a",
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<&dpi_node>, "pinctrl-0:0=",<&dpi_gpio0>;
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bus-format = <&panel>, "bus-format:0";
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+ backlight-gpio = <0>, "+2+3",
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+ <&backlight>, "gpios:4";
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};
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};
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