bcm27xx: update to latest patches from RPi foundation

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

40 files changed, 264 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/bcm2709/config-4.19 b/target/linux/bcm27xx/bcm2709/config-4.19
index c51fa3b835d..b164d0ede96 100644
--- a/target/linux/bcm27xx/bcm2709/config-4.19
+++ b/target/linux/bcm27xx/bcm2709/config-4.19
@@ -177,6 +177,7 @@ CONFIG_DUMMY_CONSOLE=y
 CONFIG_EDAC_ATOMIC_SCRUB=y
 CONFIG_EDAC_SUPPORT=y
 CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_EXT4_ENCRYPTION=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
diff --git a/target/linux/bcm27xx/bcm2710/config-4.19 b/target/linux/bcm27xx/bcm2710/config-4.19
index 22698986a89..39b72d240ab 100644
--- a/target/linux/bcm27xx/bcm2710/config-4.19
+++ b/target/linux/bcm27xx/bcm2710/config-4.19
@@ -213,6 +213,7 @@ CONFIG_DTC=y
 CONFIG_DUMMY_CONSOLE=y
 CONFIG_EDAC_SUPPORT=y
 CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_EXT4_ENCRYPTION=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
diff --git a/target/linux/bcm27xx/bcm2711/config-4.19 b/target/linux/bcm27xx/bcm2711/config-4.19
index 9d4671de8d0..03c18710522 100644
--- a/target/linux/bcm27xx/bcm2711/config-4.19
+++ b/target/linux/bcm27xx/bcm2711/config-4.19
@@ -217,6 +217,7 @@ CONFIG_DTC=y
 CONFIG_DUMMY_CONSOLE=y
 CONFIG_EDAC_SUPPORT=y
 CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_EXT4_ENCRYPTION=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
diff --git a/target/linux/bcm27xx/patches-4.19/950-0787-add-BME680-to-i2c-sensor-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0786-add-BME680-to-i2c-sensor-overlay.patch
index 55e34e288b1..55e34e288b1 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0787-add-BME680-to-i2c-sensor-overlay.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0786-add-BME680-to-i2c-sensor-overlay.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-constrain-endpoint-max-packet-and-transfer-s.patch b/target/linux/bcm27xx/patches-4.19/950-0787-dwc_otg-constrain-endpoint-max-packet-and-transfer-s.patch
index ae110add5a5..ae110add5a5 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-constrain-endpoint-max-packet-and-transfer-s.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0787-dwc_otg-constrain-endpoint-max-packet-and-transfer-s.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0789-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch b/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch
index 53c93a58360..53c93a58360 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0789-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0788-dwc_otg-fiq_fsm-pause-when-cancelling-split-transact.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0790-dwc_otg-fiq_fsm-add-a-barrier-on-entry-into-FIQ-hand.patch b/target/linux/bcm27xx/patches-4.19/950-0789-dwc_otg-fiq_fsm-add-a-barrier-on-entry-into-FIQ-hand.patch
index dc48605cb1b..dc48605cb1b 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0790-dwc_otg-fiq_fsm-add-a-barrier-on-entry-into-FIQ-hand.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0789-dwc_otg-fiq_fsm-add-a-barrier-on-entry-into-FIQ-hand.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0791-Add-universal-device-tree-overlay-for-SPI-devices.patch b/target/linux/bcm27xx/patches-4.19/950-0790-Add-universal-device-tree-overlay-for-SPI-devices.patch
index ce027e72f0a..ce027e72f0a 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0791-Add-universal-device-tree-overlay-for-SPI-devices.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0790-Add-universal-device-tree-overlay-for-SPI-devices.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0792-sound-Add-the-HiFiBerry-DAC-HD-version.patch b/target/linux/bcm27xx/patches-4.19/950-0791-sound-Add-the-HiFiBerry-DAC-HD-version.patch
index c8b8fd520b2..c8b8fd520b2 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0792-sound-Add-the-HiFiBerry-DAC-HD-version.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0791-sound-Add-the-HiFiBerry-DAC-HD-version.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch b/target/linux/bcm27xx/patches-4.19/950-0792-Initialise-rpi-firmware-before-clk-bcm2835.patch
index 3a68193506a..3a68193506a 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0792-Initialise-rpi-firmware-before-clk-bcm2835.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0794-Fix-master-mode-settings-of-HiFiBerry-DAC-ADC-PRO-ca.patch b/target/linux/bcm27xx/patches-4.19/950-0793-Fix-master-mode-settings-of-HiFiBerry-DAC-ADC-PRO-ca.patch
index 020118d95ab..020118d95ab 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0794-Fix-master-mode-settings-of-HiFiBerry-DAC-ADC-PRO-ca.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0793-Fix-master-mode-settings-of-HiFiBerry-DAC-ADC-PRO-ca.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0795-overlays-Use-preferred-compatible-strings.patch b/target/linux/bcm27xx/patches-4.19/950-0794-overlays-Use-preferred-compatible-strings.patch
index 7e5921d15d0..7e5921d15d0 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0795-overlays-Use-preferred-compatible-strings.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0794-overlays-Use-preferred-compatible-strings.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0796-tty-amba-pl011-Add-un-throttle-support.patch b/target/linux/bcm27xx/patches-4.19/950-0795-tty-amba-pl011-Add-un-throttle-support.patch
index 0ab6cf2fe9c..0ab6cf2fe9c 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0796-tty-amba-pl011-Add-un-throttle-support.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0795-tty-amba-pl011-Add-un-throttle-support.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0797-Fix-i2c-pwm-pca9685a-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0796-Fix-i2c-pwm-pca9685a-overlay.patch
index e01e7fd669e..e01e7fd669e 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0797-Fix-i2c-pwm-pca9685a-overlay.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0796-Fix-i2c-pwm-pca9685a-overlay.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0798-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-PRO-sound-.patch b/target/linux/bcm27xx/patches-4.19/950-0797-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-PRO-sound-.patch
index 233e368737a..233e368737a 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0798-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-PRO-sound-.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0797-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-PRO-sound-.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0799-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch b/target/linux/bcm27xx/patches-4.19/950-0798-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch
index 2bc030666f3..2bc030666f3 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0799-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0798-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0800-adds-LED-OFF-feature-to-HiFiBerry-DAC-DAC-PRO-sound-.patch b/target/linux/bcm27xx/patches-4.19/950-0799-adds-LED-OFF-feature-to-HiFiBerry-DAC-DAC-PRO-sound-.patch
index 68763fe27bd..68763fe27bd 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0800-adds-LED-OFF-feature-to-HiFiBerry-DAC-DAC-PRO-sound-.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0799-adds-LED-OFF-feature-to-HiFiBerry-DAC-DAC-PRO-sound-.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0801-pisound-Added-reading-Pisound-board-hardware-revisio.patch b/target/linux/bcm27xx/patches-4.19/950-0800-pisound-Added-reading-Pisound-board-hardware-revisio.patch
index bb6afe328c0..bb6afe328c0 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0801-pisound-Added-reading-Pisound-board-hardware-revisio.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0800-pisound-Added-reading-Pisound-board-hardware-revisio.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0802-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch b/target/linux/bcm27xx/patches-4.19/950-0801-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch
index 5046fc91e9a..5046fc91e9a 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0802-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0801-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0803-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch b/target/linux/bcm27xx/patches-4.19/950-0802-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch
index f08fd3d6ce0..f08fd3d6ce0 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0803-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0802-ARM-dts-Declare-RPi-4B-SD-card-power-regulator.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch b/target/linux/bcm27xx/patches-4.19/950-0803-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch
index 05172ebcec5..05172ebcec5 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0804-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0803-pcie-brcmstb-Bounce-buffer-support-is-for-BCM2711B0.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0805-bcm2838.dtsi-Use-BCM2711-PCIe-compatible-string.patch b/target/linux/bcm27xx/patches-4.19/950-0804-bcm2838.dtsi-Use-BCM2711-PCIe-compatible-string.patch
index 9286c9b0b1b..9286c9b0b1b 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0805-bcm2838.dtsi-Use-BCM2711-PCIe-compatible-string.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0804-bcm2838.dtsi-Use-BCM2711-PCIe-compatible-string.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0806-ARM-dts-Remove-bcm2838-rpi-4-b.dts.patch b/target/linux/bcm27xx/patches-4.19/950-0805-ARM-dts-Remove-bcm2838-rpi-4-b.dts.patch
index 7a0b8c5cb64..7a0b8c5cb64 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0806-ARM-dts-Remove-bcm2838-rpi-4-b.dts.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0805-ARM-dts-Remove-bcm2838-rpi-4-b.dts.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0807-tty-amba-pl011-Avoid-rare-write-when-full-error.patch b/target/linux/bcm27xx/patches-4.19/950-0806-tty-amba-pl011-Avoid-rare-write-when-full-error.patch
index 8deb882a983..8deb882a983 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0807-tty-amba-pl011-Avoid-rare-write-when-full-error.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0806-tty-amba-pl011-Avoid-rare-write-when-full-error.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0808-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch b/target/linux/bcm27xx/patches-4.19/950-0807-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch
index ba1e9d4af49..ba1e9d4af49 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0808-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0807-usb-xhci-Raspberry-Pi-FW-loader-for-VIA-VL805.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0809-overlays-Correct-the-eth_led-colour-assignments.patch b/target/linux/bcm27xx/patches-4.19/950-0808-overlays-Correct-the-eth_led-colour-assignments.patch
index 11309642097..11309642097 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0809-overlays-Correct-the-eth_led-colour-assignments.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0808-overlays-Correct-the-eth_led-colour-assignments.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0809-overlays-Remove-hack-from-uart0-overlay.patch
index ca582b81418..ca582b81418 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0810-overlays-Remove-hack-from-uart0-overlay.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0809-overlays-Remove-hack-from-uart0-overlay.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0811-ARM-dts-Add-sd_poll_once-dtparam-to-bcm283x-2711.patch b/target/linux/bcm27xx/patches-4.19/950-0810-ARM-dts-Add-sd_poll_once-dtparam-to-bcm283x-2711.patch
index 449380bd7bf..449380bd7bf 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0811-ARM-dts-Add-sd_poll_once-dtparam-to-bcm283x-2711.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0810-ARM-dts-Add-sd_poll_once-dtparam-to-bcm283x-2711.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0812-overlays-Add-ssd1306-spi-overlay-3440.patch b/target/linux/bcm27xx/patches-4.19/950-0811-overlays-Add-ssd1306-spi-overlay-3440.patch
index e27893d9acc..e27893d9acc 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0812-overlays-Add-ssd1306-spi-overlay-3440.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0811-overlays-Add-ssd1306-spi-overlay-3440.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0813-overlays-Add-sh1106-spi-and-ssd1351-spi-overlays-344.patch b/target/linux/bcm27xx/patches-4.19/950-0812-overlays-Add-sh1106-spi-and-ssd1351-spi-overlays-344.patch
index 4dc8e0943a9..4dc8e0943a9 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0813-overlays-Add-sh1106-spi-and-ssd1351-spi-overlays-344.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0812-overlays-Add-sh1106-spi-and-ssd1351-spi-overlays-344.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0814-overlays-dwc2-Increase-RX-FIFO-size.patch b/target/linux/bcm27xx/patches-4.19/950-0813-overlays-dwc2-Increase-RX-FIFO-size.patch
index a8e7bd3c905..a8e7bd3c905 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0814-overlays-dwc2-Increase-RX-FIFO-size.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0813-overlays-dwc2-Increase-RX-FIFO-size.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0815-overlays-Fix-mcp23017-s-addr-parameter.patch b/target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch
index f1750b2e2fc..f1750b2e2fc 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0815-overlays-Fix-mcp23017-s-addr-parameter.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0816-overlays-fix-sh1106-spi-ssd1306-spi-and-ssd1351-spi-.patch b/target/linux/bcm27xx/patches-4.19/950-0815-overlays-fix-sh1106-spi-ssd1306-spi-and-ssd1351-spi-.patch
index 837e7bfb170..837e7bfb170 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0816-overlays-fix-sh1106-spi-ssd1306-spi-and-ssd1351-spi-.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0815-overlays-fix-sh1106-spi-ssd1306-spi-and-ssd1351-spi-.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0817-Fix-a-sh1106-spi-ssd1306-spi-ssd1351-spi-overlays.patch b/target/linux/bcm27xx/patches-4.19/950-0816-Fix-a-sh1106-spi-ssd1306-spi-ssd1351-spi-overlays.patch
index aa472ff3703..aa472ff3703 100644
--- a/target/linux/bcm27xx/patches-4.19/950-0817-Fix-a-sh1106-spi-ssd1306-spi-ssd1351-spi-overlays.patch
+++ b/target/linux/bcm27xx/patches-4.19/950-0816-Fix-a-sh1106-spi-ssd1306-spi-ssd1351-spi-overlays.patch
diff --git a/target/linux/bcm27xx/patches-4.19/950-0817-overlays-Update-upstream-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0817-overlays-Update-upstream-overlay.patch
new file mode 100644
index 00000000000..0543b652ad1
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0817-overlays-Update-upstream-overlay.patch
@@ -0,0 +1,23 @@
+From 85c5cd3d5d6b14b3afb60bba363a6358f321ddf1 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Wed, 5 Feb 2020 09:44:54 +0000
+Subject: [PATCH] overlays: Update upstream overlay
+
+Changed due to the dwc2 overlay fifo size change.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/upstream-overlay.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/upstream-overlay.dts
++++ b/arch/arm/boot/dts/overlays/upstream-overlay.dts
+@@ -123,7 +123,7 @@
+ 			compatible = "brcm,bcm2835-usb";
+ 			dr_mode = "otg";
+ 			g-np-tx-fifo-size = <32>;
+-			g-rx-fifo-size = <256>;
++			g-rx-fifo-size = <558>;
+ 			g-tx-fifo-size = <512 512 512 512 512 256 256>;
+ 			status = "okay";
+ 		};
diff --git a/target/linux/bcm27xx/patches-4.19/950-0818-overlays-add-hdmi-backlight-hwhack-gpio-overlay.patch b/target/linux/bcm27xx/patches-4.19/950-0818-overlays-add-hdmi-backlight-hwhack-gpio-overlay.patch
new file mode 100644
index 00000000000..4610568b646
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0818-overlays-add-hdmi-backlight-hwhack-gpio-overlay.patch
@@ -0,0 +1,106 @@
+From 24ec4e6211e88c02b925182281cb435f96dbd692 Mon Sep 17 00:00:00 2001
+From: Michael Kaplan <m.kaplan@evva.com>
+Date: Wed, 5 Feb 2020 10:27:23 +0100
+Subject: [PATCH] overlays: add hdmi-backlight-hwhack-gpio-overlay
+
+This is a Devicetree overlay for GPIO based backlight on/off capability.
+
+Use this if you have one of those HDMI displays whose backlight cannot be controlled via DPMS over HDMI and plan to do a little soldering to use an RPi gpio pin for on/off switching.
+
+See: https://www.waveshare.com/wiki/7inch_HDMI_LCD_(C)#Backlight_Control
+
+This was tested with a clone of the Waveshare "7 inch HDMI Touch LCD C" where I soldered two mosfets to override the backlight dip-switch.
+When the overlay is loaded, a sysfs backlight node appears which can be used to modify the brightness value (0 or 1), and is even used by DPMS to switch the display backlight off after the configured timeout.
+(On current Raspbian Buster Desktop, it's also possible to wakeup the display via a tap on the touch display :-) )
+
+Signed-off-by: Michael Kaplan <m.kaplan@evva.com>
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             | 14 ++++++
+ .../hdmi-backlight-hwhack-gpio-overlay.dts    | 47 +++++++++++++++++++
+ 3 files changed, 62 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/hdmi-backlight-hwhack-gpio-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -51,6 +51,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ 	gpio-poweroff.dtbo \
+ 	gpio-shutdown.dtbo \
+ 	hd44780-lcd.dtbo \
++	hdmi-backlight-hwhack-gpio.dtbo \
+ 	hifiberry-amp.dtbo \
+ 	hifiberry-dac.dtbo \
+ 	hifiberry-dacplus.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -883,6 +883,20 @@ Params: pin_d4                  GPIO pin
+         display_width           Width of the display in characters
+ 
+ 
++Name:   hdmi-backlight-hwhack-gpio
++Info:   Devicetree overlay for GPIO based backlight on/off capability.
++        Use this if you have one of those HDMI displays whose backlight cannot
++        be controlled via DPMS over HDMI and plan to do a little soldering to
++        use an RPi gpio pin for on/off switching. See:
++        https://www.waveshare.com/wiki/7inch_HDMI_LCD_(C)#Backlight_Control
++Load:   dtoverlay=hdmi-backlight-hwhack-gpio,<param>=<val>
++Params: gpio_pin                GPIO pin used (default 17)
++        active_low              Set this to 1 if the display backlight is
++                                switched on when the wire goes low.
++                                Leave the default (value 0) if the backlight
++                                expects a high to switch it on.
++
++
+ Name:   hifiberry-amp
+ Info:   Configures the HifiBerry Amp and Amp+ audio cards
+ Load:   dtoverlay=hifiberry-amp
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/hdmi-backlight-hwhack-gpio-overlay.dts
+@@ -0,0 +1,47 @@
++/*
++ * Devicetree overlay for GPIO based backlight on/off capability.
++ *
++ * Use this if you have one of those HDMI displays whose backlight cannot be
++ * controlled via DPMS over HDMI and plan to do a little soldering to use an
++ * RPi gpio pin for on/off switching.
++ *
++ * See: https://www.waveshare.com/wiki/7inch_HDMI_LCD_(C)#Backlight_Control
++ *
++ */
++/dts-v1/;
++/plugin/;
++
++/ {
++	compatible = "brcm,bcm2835";
++
++	fragment@1 {
++		target = <&gpio>;
++		__overlay__ {
++			hdmi_backlight_hwhack_gpio_pins: hdmi_backlight_hwhack_gpio_pins {
++				brcm,pins = <17>;
++				brcm,function = <1>; /* out */
++			};
++		};
++	};
++
++	fragment@2 {
++		target-path = "/";
++		__overlay__ {
++			hdmi_backlight_hwhack_gpio: hdmi_backlight_hwhack_gpio {
++				compatible = "gpio-backlight";
++
++				pinctrl-names = "default";
++				pinctrl-0 = <&hdmi_backlight_hwhack_gpio_pins>;
++
++				gpios = <&gpio 17 0>;
++				default-on;
++			};
++		};
++	};
++
++	__overrides__ {
++		gpio_pin   = <&hdmi_backlight_hwhack_gpio>,"gpios:4",
++		             <&hdmi_backlight_hwhack_gpio_pins>,"brcm,pins:0";
++		active_low = <&hdmi_backlight_hwhack_gpio>,"gpios:8";
++	};
++};
diff --git a/target/linux/bcm27xx/patches-4.19/950-0819-overlays-Add-timeout_ms-parameter-to-gpio-poweroff.patch b/target/linux/bcm27xx/patches-4.19/950-0819-overlays-Add-timeout_ms-parameter-to-gpio-poweroff.patch
new file mode 100644
index 00000000000..313ec830c35
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0819-overlays-Add-timeout_ms-parameter-to-gpio-poweroff.patch
@@ -0,0 +1,34 @@
+From 4c4cc35a921e7706b696c25ce432b23ad32cd6e5 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Fri, 7 Feb 2020 09:51:31 +0000
+Subject: [PATCH] overlays: Add timeout_ms parameter to gpio-poweroff
+
+The timeout_ms parameter specifies in milliseconds how long the kernel
+waits for power-down before issuing a WARN. The default value is 3000 ms.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/README                    | 2 ++
+ arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts | 1 +
+ 2 files changed, 3 insertions(+)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -821,6 +821,8 @@ Params: gpiopin                 GPIO for
+         input                   Set if the gpio pin should be configured as
+                                 an input.
+         export                  Set to export the configured pin to sysfs
++        timeout_ms              Specify (in ms) how long the kernel waits for
++                                power-down before issuing a WARN (default 3000).
+ 
+ 
+ Name:   gpio-shutdown
+--- a/arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts
++++ b/arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts
+@@ -32,5 +32,6 @@
+ 		active_low =    <&power_ctrl>,"gpios:8";
+ 		input =         <&power_ctrl>,"input?";
+ 		export =        <&power_ctrl>,"export?";
++		timeout_ms =    <&power_ctrl>,"timeout-ms:0";
+ 	};
+ };
diff --git a/target/linux/bcm27xx/patches-4.19/950-0820-of-overlay-Correct-symbol-path-fixups.patch b/target/linux/bcm27xx/patches-4.19/950-0820-of-overlay-Correct-symbol-path-fixups.patch
new file mode 100644
index 00000000000..34b54f18df9
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0820-of-overlay-Correct-symbol-path-fixups.patch
@@ -0,0 +1,37 @@
+From c580e406566b6dac7810b495632bdbac11eb88a4 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 6 Feb 2020 12:23:15 +0000
+Subject: [PATCH] of: overlay: Correct symbol path fixups
+
+When symbols from overlays are added to the live tree their paths must
+be rebased. The translated symbol is normally the result of joining
+the fragment-relative path (with a leading "/") to the target path
+(either copied directly from the "target-path" property or resolved
+from the phandle). This translation fails when the target is the root
+node (a common case for Raspberry Pi overlays) because the resulting
+path starts with a double slash. For example, if target-path is "/" and
+the fragment adds a node called "newnode", the label associated with
+that node will be assigned the path "//newnode", which can't be found
+in the tree.
+
+Fix the failure case by explicitly replacing a target path of "/" with
+an empty string.
+
+Fixes: d1651b03c2df ("of: overlay: add overlay symbols to live device tree")
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ drivers/of/overlay.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/of/overlay.c
++++ b/drivers/of/overlay.c
+@@ -245,6 +245,8 @@ static struct property *dup_and_fixup_sy
+ 	if (!target_path)
+ 		return NULL;
+ 	target_path_len = strlen(target_path);
++	if (!strcmp(target_path, "/"))
++		target_path_len = 0;
+ 
+ 	new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
+ 	if (!new_prop)
diff --git a/target/linux/bcm27xx/patches-4.19/950-0821-ASoC-sgtl5000-add-ADC-mute-control.patch b/target/linux/bcm27xx/patches-4.19/950-0821-ASoC-sgtl5000-add-ADC-mute-control.patch
new file mode 100644
index 00000000000..68d670c1ad7
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0821-ASoC-sgtl5000-add-ADC-mute-control.patch
@@ -0,0 +1,28 @@
+From 291a74051f1d5337bbfcbb0aaa17c8774ad84624 Mon Sep 17 00:00:00 2001
+From: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
+Date: Fri, 19 Jul 2019 10:05:34 +0000
+Subject: [PATCH] ASoC: sgtl5000: add ADC mute control
+
+This control mute/unmute the ADC input of SGTL5000
+using its CHIP_ANA_CTRL register.
+
+Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
+Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
+Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
+Reviewed-by: Fabio Estevam <festevam@gmail.com>
+Link: https://lore.kernel.org/r/20190719100524.23300-5-oleksandr.suvorov@toradex.com
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ sound/soc/codecs/sgtl5000.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/sound/soc/codecs/sgtl5000.c
++++ b/sound/soc/codecs/sgtl5000.c
+@@ -712,6 +712,7 @@ static const struct snd_kcontrol_new sgt
+ 			SGTL5000_CHIP_ANA_ADC_CTRL,
+ 			8, 1, 0, capture_6db_attenuate),
+ 	SOC_SINGLE("Capture ZC Switch", SGTL5000_CHIP_ANA_CTRL, 1, 1, 0),
++	SOC_SINGLE("Capture Switch", SGTL5000_CHIP_ANA_CTRL, 0, 1, 1),
+ 
+ 	SOC_DOUBLE_TLV("Headphone Playback Volume",
+ 			SGTL5000_CHIP_ANA_HP_CTRL,
diff --git a/target/linux/bcm27xx/patches-4.19/950-0822-ARM-dts-Remove-virtgpio-from-bcm2711-rpi-4-b.dts.patch b/target/linux/bcm27xx/patches-4.19/950-0822-ARM-dts-Remove-virtgpio-from-bcm2711-rpi-4-b.dts.patch
new file mode 100644
index 00000000000..a3f9badb331
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0822-ARM-dts-Remove-virtgpio-from-bcm2711-rpi-4-b.dts.patch
@@ -0,0 +1,33 @@
+From ae29bcf2ddf2b82098d003768a51d28b90ffc5b4 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Tue, 25 Feb 2020 16:53:31 +0000
+Subject: [PATCH] ARM: dts: Remove virtgpio from bcm2711-rpi-4-b.dts
+
+Pi 4B doesn't need the virtgpio driver (it was added to reduce the
+overhead of driving the ACT LED on the Pi 3B's GPIO expander), so
+remove the instantiation by the Pi 4 DTS file to avoid confusion.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 10 ----------
+ 1 file changed, 10 deletions(-)
+
+--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
++++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+@@ -34,16 +34,6 @@
+ 	};
+ };
+ 
+-&soc {
+-	virtgpio: virtgpio {
+-		compatible = "brcm,bcm2835-virtgpio";
+-		gpio-controller;
+-		#gpio-cells = <2>;
+-		firmware = <&firmware>;
+-		status = "okay";
+-	};
+-};
+-
+ &mmcnr {
+ 	pinctrl-names = "default";
+ 	pinctrl-0 = <&sdio_pins>;