bcm27xx: add kernel 5.10 support

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>

1 files changed, 153 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0479-dtoverlays-Add-an-overlay-for-the-VGA666-when-used-w.patch b/target/linux/bcm27xx/patches-5.10/950-0479-dtoverlays-Add-an-overlay-for-the-VGA666-when-used-w.patch
new file mode 100644
index 0000000000..0bfe1c9e30
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0479-dtoverlays-Add-an-overlay-for-the-VGA666-when-used-w.patch
@@ -0,0 +1,153 @@
+From 99f2ab0dad947049e0fa62e88c1e4c1feb7ab379 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Thu, 4 Feb 2021 14:41:10 +0000
+Subject: [PATCH] dtoverlays: Add an overlay for the VGA666 when used
+ with vc4-kms-v3d
+
+Includes optional use of GPIOs 0&1 / BSC0 for DDC to read the EDID
+from the display.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/Makefile           |   1 +
+ arch/arm/boot/dts/overlays/README             |  10 ++
+ .../dts/overlays/vc4-kms-vga666-overlay.dts   | 100 ++++++++++++++++++
+ 3 files changed, 111 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/vc4-kms-vga666-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -211,6 +211,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ 	vc4-kms-kippah-7inch.dtbo \
+ 	vc4-kms-v3d.dtbo \
+ 	vc4-kms-v3d-pi4.dtbo \
++	vc4-kms-vga666.dtbo \
+ 	vga666.dtbo \
+ 	w1-gpio.dtbo \
+ 	w1-gpio-pullup.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -3120,10 +3120,20 @@ Params: cma-512                 CMA is 5
+                                 outputs)
+ 
+ 
++Name:   vc4-kms-vga666
++Info:   Enable the VGA666 (resistor ladder ADC) for the vc4-kms-v3d driver.
++        Requires vc4-kms-v3d to be loaded.
++Load:   dtoverlay=vc4-kms-vga666,<param>
++Params: ddc                     Enables GPIOs 0&1 as the I2C to read the EDID
++                                from the display. NB These are NOT 5V tolerant
++                                GPIOs, therefore level shifters are required.
++
++
+ Name:   vga666
+ Info:   Overlay for the Fen Logic VGA666 board
+         This uses GPIOs 2-21 (so no I2C), and activates the output 2-3 seconds
+         after the kernel has started.
++        NOT for use with vc4-kms-v3d.
+ Load:   dtoverlay=vga666
+ Params: <None>
+ 
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/vc4-kms-vga666-overlay.dts
+@@ -0,0 +1,100 @@
++/*
++ * vc4-kms-vga666-overlay.dts
++ * Configures a FenLogic or similar VGA666 DPI adapter when using the
++ * vc4-kms-v3d driver.
++ * If a suitable I2C level shifter is connected to GPIOs 0&1 and the VGA
++ * ID1/SDA (pin 12) and ID3/SCL (pin 15) lines, then there is the option to
++ * enable reading the EDID from the display.
++ */
++
++/dts-v1/;
++/plugin/;
++
++#include <dt-bindings/pinctrl/bcm2835.h>
++
++/ {
++	compatible = "brcm,bcm2835";
++
++	fragment@0 {
++		target-path = "/";
++		__overlay__ {
++			vga_connector: vga_connector {
++				compatible = "vga-connector";
++				label = "vga";
++
++				port {
++					vga_con_in: endpoint {
++						remote-endpoint = <&vga666_out>;
++					};
++				};
++			};
++
++			vga_dac {
++				compatible = "dumb-vga-dac";
++
++				ports {
++					#address-cells = <1>;
++					#size-cells = <0>;
++
++					port@0 {
++						reg = <0>;
++
++						vga666_in: endpoint {
++							remote-endpoint = <&dpi_out>;
++						};
++					};
++
++					port@1 {
++						reg = <1>;
++
++						vga666_out: endpoint {
++							remote-endpoint = <&vga_con_in>;
++						};
++					};
++				};
++			};
++
++		};
++	};
++
++	fragment@1 {
++		target = <&dpi>;
++		__overlay__  {
++			status = "okay";
++
++			pinctrl-names = "default";
++			pinctrl-0 = <&dpi_18bit_gpio2>;
++
++			port {
++				dpi_out: endpoint@0 {
++					remote-endpoint = <&vga666_in>;
++				};
++			};
++		};
++	};
++
++	fragment@2 {
++		target = <&vga_connector>;
++		__dormant__  {
++			ddc-i2c-bus = <&i2c_vc>;
++		};
++	};
++
++	fragment@3 {
++		target = <&i2c0if>;
++		__dormant__ {
++			status = "okay";
++		};
++	};
++
++	fragment@4 {
++		target = <&i2c0mux>;
++		__dormant__ {
++			status = "okay";
++		};
++	};
++
++	__overrides__ {
++		ddc = <0>,"=2", <0>,"=3", <0>,"=4";
++	};
++};