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, 38 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0163-staging-bcm2835-camera-Ensure-timestamps-never-go-ba.patch b/target/linux/bcm27xx/patches-5.4/950-0163-staging-bcm2835-camera-Ensure-timestamps-never-go-ba.patch
new file mode 100644
index 0000000000..c9e18874ab
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0163-staging-bcm2835-camera-Ensure-timestamps-never-go-ba.patch
@@ -0,0 +1,38 @@
+From fd3a6710bbcf875c85e6a2f3513c6eb4c46adeaa Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Tue, 24 Jul 2018 12:08:29 +0100
+Subject: [PATCH] staging: bcm2835-camera: Ensure timestamps never go
+ backwards.
+
+There is an awkward situation with H264 header bytes. Currently
+they are returned with a PTS of 0 because they aren't associated
+with a timestamped frame to encode. These are handled by either
+returning the timestamp of the last buffer to have been received,
+or in the case of the first buffer the timestamp taken at
+start_streaming.
+This results in a race where the current frame may have started
+before we take the start time, which results in the first encoded
+frame having an earlier timestamp than the header bytes.
+
+Ensure that we never return a negative delta to the user by checking
+against the previous timestamp.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ .../staging/vc04_services/bcm2835-camera/bcm2835-camera.c    | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
++++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+@@ -380,6 +380,11 @@ static void buffer_cb(struct vchiq_mmal_
+ 			 ktime_to_ns(dev->capture.kernel_start_ts),
+ 			 dev->capture.vc_start_timestamp, pts,
+ 			 ktime_to_ns(timestamp));
++		if (timestamp < dev->capture.last_timestamp) {
++			v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
++				 "Negative delta - using last time\n");
++			timestamp = dev->capture.last_timestamp;
++		}
+ 		buf->vb.vb2_buf.timestamp = ktime_to_ns(timestamp);
+ 	} else {
+ 		if (dev->capture.last_timestamp) {