bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

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

1 files changed, 34 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0996-staging-bcm2835-audio-Add-disable-headphones-flag.patch b/target/linux/bcm27xx/patches-5.4/950-0996-staging-bcm2835-audio-Add-disable-headphones-flag.patch
new file mode 100644
index 0000000000..3c30745714
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0996-staging-bcm2835-audio-Add-disable-headphones-flag.patch
@@ -0,0 +1,34 @@
+From af217539bab20a3bba6e1bbd4e4c8f68e7644e50 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Mon, 26 Oct 2020 10:23:22 +0000
+Subject: [PATCH] staging: bcm2835-audio: Add disable-headphones flag
+
+Add a property to allow the headphone output to be disabled. Use an
+integer property rather than a boolean so that an overlay can clear it.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ drivers/staging/vc04_services/bcm2835-audio/bcm2835.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
+@@ -381,11 +381,16 @@ static int snd_bcm2835_alsa_probe(struct
+ 	}
+ 
+ 	if (!enable_compat_alsa) {
++		// In this mode, enable analog output by default
++		u32 disable_headphones = 0;
++
+ 		if (!of_property_read_bool(dev->of_node, "brcm,disable-hdmi"))
+ 			set_hdmi_enables(dev);
+ 
+-		// In this mode, always enable analog output
+-		enable_headphones = true;
++		of_property_read_u32(dev->of_node,
++				     "brcm,disable-headphones",
++				     &disable_headphones);
++		enable_headphones = !disable_headphones;
+ 	} else {
+ 		enable_hdmi0 = enable_hdmi;
+ 	}