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>
(cherry-picked from commit f07e572f64)

1 files changed, 28 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0687-media-bcm2835-unicam-Do-not-stop-streaming-in-unicam.patch b/target/linux/bcm27xx/patches-5.4/950-0687-media-bcm2835-unicam-Do-not-stop-streaming-in-unicam.patch
new file mode 100644
index 0000000000..74abba4ac9
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0687-media-bcm2835-unicam-Do-not-stop-streaming-in-unicam.patch
@@ -0,0 +1,28 @@
+From 37e9677654a48cfa748c1d22fbf782920ab2cb23 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Wed, 29 Apr 2020 22:05:09 +0100
+Subject: [PATCH] media: bcm2835-unicam: Do not stop streaming in
+ unicam_release
+
+unicam_release calls _vb2_fop_release, which will call stop_streaming
+if that particular node was streaming. Calling it unconditionally (as
+the code was) means that if a second handle was opened eg to alter
+a setting, on closing that connection it also stopped Unicam.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/media/platform/bcm2835/bcm2835-unicam.c | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
++++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
+@@ -2204,9 +2204,6 @@ static int unicam_release(struct file *f
+ 	if (fh_singular)
+ 		v4l2_subdev_call(sd, core, s_power, 0);
+ 
+-	if (node->streaming)
+-		unicam_stop_streaming(&node->buffer_queue);
+-
+ 	node->open--;
+ 	mutex_unlock(&node->lock);
+