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8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
154 lines
3.6 KiB
Diff
154 lines
3.6 KiB
Diff
From 99f2ab0dad947049e0fa62e88c1e4c1feb7ab379 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 4 Feb 2021 14:41:10 +0000
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Subject: [PATCH] dtoverlays: Add an overlay for the VGA666 when used
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with vc4-kms-v3d
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Includes optional use of GPIOs 0&1 / BSC0 for DDC to read the EDID
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from the display.
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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/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 10 ++
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.../dts/overlays/vc4-kms-vga666-overlay.dts | 100 ++++++++++++++++++
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3 files changed, 111 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/vc4-kms-vga666-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -211,6 +211,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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vc4-kms-kippah-7inch.dtbo \
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vc4-kms-v3d.dtbo \
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vc4-kms-v3d-pi4.dtbo \
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+ vc4-kms-vga666.dtbo \
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vga666.dtbo \
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w1-gpio.dtbo \
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w1-gpio-pullup.dtbo \
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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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@@ -3120,10 +3120,20 @@ Params: cma-512 CMA is 5
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outputs)
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+Name: vc4-kms-vga666
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+Info: Enable the VGA666 (resistor ladder ADC) for the vc4-kms-v3d driver.
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+ Requires vc4-kms-v3d to be loaded.
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+Load: dtoverlay=vc4-kms-vga666,<param>
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+Params: ddc Enables GPIOs 0&1 as the I2C to read the EDID
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+ from the display. NB These are NOT 5V tolerant
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+ GPIOs, therefore level shifters are required.
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+
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+
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Name: vga666
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Info: Overlay for the Fen Logic VGA666 board
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This uses GPIOs 2-21 (so no I2C), and activates the output 2-3 seconds
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after the kernel has started.
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+ NOT for use with vc4-kms-v3d.
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Load: dtoverlay=vga666
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Params: <None>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/vc4-kms-vga666-overlay.dts
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@@ -0,0 +1,100 @@
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+/*
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+ * vc4-kms-vga666-overlay.dts
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+ * Configures a FenLogic or similar VGA666 DPI adapter when using the
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+ * vc4-kms-v3d driver.
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+ * If a suitable I2C level shifter is connected to GPIOs 0&1 and the VGA
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+ * ID1/SDA (pin 12) and ID3/SCL (pin 15) lines, then there is the option to
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+ * enable reading the EDID from the display.
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+ */
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+
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+/dts-v1/;
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+/plugin/;
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+
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+#include <dt-bindings/pinctrl/bcm2835.h>
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+
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+/ {
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+ compatible = "brcm,bcm2835";
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+
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+ fragment@0 {
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+ target-path = "/";
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+ __overlay__ {
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+ vga_connector: vga_connector {
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+ compatible = "vga-connector";
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+ label = "vga";
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+
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+ port {
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+ vga_con_in: endpoint {
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+ remote-endpoint = <&vga666_out>;
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+ };
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+ };
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+ };
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+
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+ vga_dac {
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+ compatible = "dumb-vga-dac";
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+
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+ ports {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ port@0 {
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+ reg = <0>;
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+
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+ vga666_in: endpoint {
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+ remote-endpoint = <&dpi_out>;
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+ };
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+ };
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+
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+ port@1 {
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+ reg = <1>;
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+
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+ vga666_out: endpoint {
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+ remote-endpoint = <&vga_con_in>;
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+ };
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+ };
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+ };
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+ };
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+
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&dpi>;
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+ __overlay__ {
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+ status = "okay";
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+
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&dpi_18bit_gpio2>;
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+
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+ port {
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+ dpi_out: endpoint@0 {
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+ remote-endpoint = <&vga666_in>;
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+ };
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+ };
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&vga_connector>;
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+ __dormant__ {
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+ ddc-i2c-bus = <&i2c_vc>;
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&i2c0if>;
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+ __dormant__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&i2c0mux>;
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+ __dormant__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ __overrides__ {
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+ ddc = <0>,"=2", <0>,"=3", <0>,"=4";
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+ };
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+};
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