brcmfmac: Restore ISO3166 and 0 rev as a fallback

Commit b0b524f ("brcmfmac: use ISO3166 country code and 0 rev
as fallback") was a welcome addition for Raspberry Pi as it replaced
an equivalent bit of downstream code. Commit 151a7c1 reverted
it because it broke BCM4359/9 devices.

This is a renamed reversion of the reversion.

See: raspberrypi/Raspberry-Pi-OS-64bit#217

Signed-off-by: Phil Elwell <[email protected]>

bcm2835-codec: Return empty buffers to the VPU instead of queueing to…

… vbuf2

The encoder can skip frames totally should rate control overshoot
the target bitrate too far. In this situation it generates an
output buffer of length 0.
V4L2 treats a buffer of length 0 as an end of stream flag, which is
not appropriate in this case, therefore we can not return that buffer
to the client.

The driver was returning the buffer to videobuf2 in the QUEUED state,
however that buffer was then not dequeued again, so the number of
buffers was reduced each time this happened. In the pathological
case of using GStreamer's videotestsrc in mode 1 for noise, this happens
sufficiently frequently to totally stall the pipeline.

If the port is still enabled then return the buffer straight back to
the VPU rather than to videobuf2.

Signed-off-by: Dave Stevenson <[email protected]>

Merge remote-tracking branch 'stable/linux-5.10.y' into stable

Merge remote-tracking branch 'stable/linux-5.10.y' into oldstable

Merge remote-tracking branch 'stable/linux-5.10.y' into rpi-5.10.y

Merge remote-tracking branch 'stable/linux-5.10.y' into rpi-5.10.y

configs: Add USB gadget support (for Zero 2 W)

Bring the Pi 3 kernel in line with the Pi Zero and Pi 4 by enabling
USB gadget support, which is useful on Zero 2 W.

See: raspberrypi/firmware#1654

Signed-off-by: Phil Elwell <[email protected]>

ARM: dts: Add Pi Zero 2 support

Signed-off-by: Phil Elwell <[email protected]>

ARM: dts: Add Pi Zero 2 support

Signed-off-by: Phil Elwell <[email protected]>

dwc_otg: pay attention to qh->interval when rescheduling periodic queues

A regression introduced in raspberrypi#3887
meant that if the newly scheduled transfer immediately returned data, and
the driver resubmitted a single URB after every transfer, then the effective
polling interval would end up being approx 1ms.

Use the larger of SCHEDULE_SLOP or the configured endpoint interval.

Signed-off-by: Jonathan Bell <[email protected]>