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, 33 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0535-sound-usb-call-usb_autopm_get_interface-for-devices-.patch b/target/linux/bcm27xx/patches-5.10/950-0535-sound-usb-call-usb_autopm_get_interface-for-devices-.patch
new file mode 100644
index 0000000000..3b4a78d21b
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0535-sound-usb-call-usb_autopm_get_interface-for-devices-.patch
@@ -0,0 +1,33 @@
+From ec43e93b7e36e2baa6685da504b9db3ac7048ceb Mon Sep 17 00:00:00 2001
+From: Jonathan Bell <jonathan@raspberrypi.com>
+Date: Fri, 16 Apr 2021 11:40:23 +0100
+Subject: [PATCH] sound/usb: call usb_autopm_get_interface() for
+ devices that should not be suspended
+
+Webcams with microphones are composite devices, and autosuspend is set
+at the device level. If uvcvideo is probed after snd-usb-audio, the effect
+of the quirk applied by snd-usb-audio is undone by uvcvideo's global
+application of autosuspend.
+
+Incrementing the interface's PM refcount in such cases prevents runtime PM
+from happening, thus the device is left active.
+
+Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
+---
+ sound/usb/quirks.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/sound/usb/quirks.c
++++ b/sound/usb/quirks.c
+@@ -531,6 +531,11 @@ static int setup_disable_autosuspend(str
+ 				       struct usb_driver *driver,
+ 				       const struct snd_usb_audio_quirk *quirk)
+ {
++	/*
++	 * Grab the interface, because on a webcam uvcvideo may race
++	 * with snd-usb-audio during probe and re-enable autosuspend.
++	 */
++	usb_autopm_get_interface(iface);
+ 	usb_disable_autosuspend(interface_to_usbdev(iface));
+ 	return 1;	/* Continue with creating streams and mixer */
+ }