Merge pull request #67 from TsaiGaggery/fix-camera-v4l2-relayd-v2

intel-ipu7-camera: v4l2-relayd with OBS and Zoom fixes
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Gaggery authored and GitHub committed 2026-04-01 14:18:47 +02:00
1 parent b19cf292e8
commit e3ed6931a0
11 files changed
+92 -237

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@@ -0,0 +1,8 @@
# Hide raw IPU7 ISYS capture devices from ALL applications.
# These are internal ISP nodes that output raw 12-bit Bayer data and cannot produce usable frames.
# Camera is provided via v4l2loopback (/dev/video50) through v4l2-relayd instead.
#
# This rule MUST run after 70-uaccess.rules (which adds TAG="uaccess" to video4linux)
# but BEFORE 73-seat-late.rules (which applies per-user ACLs based on that tag).
# MODE=0600 + GROUP=root blocks even users in the 'video' group.
SUBSYSTEM=="video4linux", ATTR{name}=="Intel IPU7 ISYS Capture *", TAG-="uaccess", TAG-="seat", MODE="0600", GROUP="root"
@@ -1,6 +1 @@
KERNEL=="ipu7-psys0", MODE="0666", SYMLINK+="ipu-psys0"
# Hide raw IPU7 ISYS capture devices from applications.
# These are internal ISP nodes that cannot produce frames directly.
# Camera is provided via v4l2loopback (/dev/video50) instead.
SUBSYSTEM=="video4linux", ATTR{name}=="Intel IPU7 ISYS Capture *", TAG-="uaccess"
+14 -12
View File
@@ -1,7 +1,7 @@
# Maintainer: Omarchy <packages@omarchy.org>
pkgname=intel-ipu7-camera
pkgver=1.0.2
pkgver=1.0.3
pkgrel=1
pkgdesc="Intel IPU7 MIPI camera stack for Hurrican/Performance (OV08X40 + hardware ISP)"
arch=('x86_64')
@@ -11,13 +11,13 @@ depends=(
'dkms'
'linux-headers'
'v4l2loopback-dkms'
'v4l2-relayd'
'gstreamer'
'gst-plugins-base'
'gst-plugins-good'
'gst-plugins-bad'
'jsoncpp'
'libdrm'
'python'
)
makedepends=(
'git'
@@ -48,16 +48,16 @@ source=(
"dkms-vision-drivers.conf"
"camera-deps.conf"
"v4l2loopback-modprobe.conf"
"v4l2loopback-modules-load.conf"
"camera-init.service"
"camera-feed-watch"
"camera-feed-watch.service"
"hide-ipu7-v4l2.conf"
"disable-libcamera.conf"
"71-ipu7-hide-isys.rules"
"90-ipu7-psys.rules"
"camera-tmpfiles.conf"
"ov08x40.yaml"
"camera-sleep-hook"
"v4l2-relayd-ipu7.conf"
"v4l2-relayd-ipu7-override.conf"
)
sha256sums=(
'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP'
@@ -194,16 +194,10 @@ package() {
"${pkgdir}/usr/lib/modprobe.d/camera-deps.conf"
install -Dm644 "${srcdir}/v4l2loopback-modprobe.conf" \
"${pkgdir}/usr/lib/modprobe.d/v4l2loopback-camera.conf"
install -Dm644 "${srcdir}/v4l2loopback-modules-load.conf" \
"${pkgdir}/usr/lib/modules-load.d/v4l2loopback.conf"
# systemd
install -Dm644 "${srcdir}/camera-init.service" \
"${pkgdir}/usr/lib/systemd/system/camera-init.service"
install -Dm644 "${srcdir}/camera-feed-watch.service" \
"${pkgdir}/usr/lib/systemd/user/camera-feed-watch.service"
install -Dm755 "${srcdir}/camera-feed-watch" \
"${pkgdir}/usr/bin/camera-feed-watch"
# WirePlumber
install -Dm644 "${srcdir}/hide-ipu7-v4l2.conf" \
@@ -211,9 +205,17 @@ package() {
install -Dm644 "${srcdir}/disable-libcamera.conf" \
"${pkgdir}/usr/share/wireplumber/wireplumber.conf.d/disable-libcamera.conf"
# udev / tmpfiles / libcamera tuning
# udev rules
install -Dm644 "${srcdir}/71-ipu7-hide-isys.rules" \
"${pkgdir}/usr/lib/udev/rules.d/71-ipu7-hide-isys.rules"
install -Dm644 "${srcdir}/90-ipu7-psys.rules" \
"${pkgdir}/usr/lib/udev/rules.d/90-ipu7-psys.rules"
# v4l2-relayd config for IPU7 camera
install -Dm644 "${srcdir}/v4l2-relayd-ipu7.conf" \
"${pkgdir}/etc/v4l2-relayd.d/ipu7.conf"
install -Dm644 "${srcdir}/v4l2-relayd-ipu7-override.conf" \
"${pkgdir}/etc/systemd/system/v4l2-relayd@ipu7.service.d/override.conf"
install -Dm644 "${srcdir}/camera-tmpfiles.conf" \
"${pkgdir}/usr/lib/tmpfiles.d/camera.conf"
install -Dm644 "${srcdir}/ov08x40.yaml" \
@@ -1,144 +0,0 @@
#!/usr/bin/env python3
"""On-demand camera feed for v4l2loopback.
Holds /dev/video50 open permanently so v4l2loopback stays in capture mode.
Writes black frames when idle (0% CPU, LED off). Starts the real camera
pipeline when an app opens the device, relaying frames through the same fd.
Stops the camera when all readers close. No fd gap = no stream interruption.
"""
import fcntl, os, signal, struct, subprocess, sys, threading, time
DEVICE = "/dev/video50"
W, H = 1920, 1080
FSIZE = W * H * 3 // 2
POLL = 2
STOP_DELAY = 6
BLACK = bytes(W * H) + bytes([128] * (W * H // 2))
dev = os.open(DEVICE, os.O_WRONLY)
pixfmt = struct.pack("II4sIIII4x188x", W, H, b"NV12", 1, W, FSIZE, 0)
fmt = struct.pack("I4x", 2) + pixfmt
fcntl.ioctl(dev, 0xC0D05605, fmt)
os.write(dev, BLACK)
# Restart WirePlumber so it sees the capture device
time.sleep(1)
subprocess.run(["systemctl", "--user", "restart", "wireplumber.service"],
capture_output=True, timeout=10)
cam_proc = None
cam_lock = threading.Lock()
stop_idle = threading.Event()
def write_idle():
while not stop_idle.is_set():
try:
os.write(dev, BLACK)
except OSError:
pass
stop_idle.wait(2)
def relay_camera():
global cam_proc
env = os.environ.copy()
env["GST_PLUGIN_PATH"] = "/usr/lib/gstreamer-1.0"
cam_proc = subprocess.Popen(
["gst-launch-1.0", "-q",
"icamerasrc", "device-name=ov08x40-uf",
"sharpness=80", "ev=-1", "saturation=10",
"!", "video/x-raw,format=NV12,width=1920,height=1080",
"!", "videoflip", "method=rotate-180",
"!", "fdsink", "fd=1"],
stdout=subprocess.PIPE, stderr=subprocess.DEVNULL, env=env,
)
buf = b""
while cam_proc.poll() is None:
data = cam_proc.stdout.read(65536)
if not data:
break
buf += data
while len(buf) >= FSIZE:
try:
os.write(dev, buf[:FSIZE])
except OSError:
pass
buf = buf[FSIZE:]
cam_proc = None
def has_readers():
try:
r = subprocess.run(["fuser", DEVICE], capture_output=True, text=True, timeout=5)
for pid in r.stdout.strip().split():
pid = pid.strip()
if not pid:
continue
if int(pid) == os.getpid():
continue
with cam_lock:
if cam_proc and int(pid) == cam_proc.pid:
continue
return True
except Exception:
pass
return False
def start_camera():
stop_idle.set()
t = threading.Thread(target=relay_camera, daemon=True)
t.start()
return t
def stop_camera():
with cam_lock:
if cam_proc:
cam_proc.terminate()
try:
cam_proc.wait(timeout=5)
except subprocess.TimeoutExpired:
cam_proc.kill()
stop_idle.clear()
t = threading.Thread(target=write_idle, daemon=True)
t.start()
return t
def shutdown(sig, frame):
stop_idle.set()
with cam_lock:
if cam_proc:
cam_proc.terminate()
os.close(dev)
sys.exit(0)
signal.signal(signal.SIGTERM, shutdown)
signal.signal(signal.SIGINT, shutdown)
# Start idle
idle_thread = threading.Thread(target=write_idle, daemon=True)
idle_thread.start()
active = False
idle_count = 0
while True:
if has_readers():
idle_count = 0
if not active:
start_camera()
active = True
else:
if active:
idle_count += 1
if idle_count >= STOP_DELAY // POLL:
stop_camera()
active = False
idle_count = 0
time.sleep(POLL)
@@ -1,12 +0,0 @@
[Unit]
Description=Camera feed for v4l2loopback (on-demand, LED off when idle)
After=pipewire.service camera-init.service
[Service]
Type=simple
ExecStart=/usr/bin/camera-feed-watch
Restart=on-failure
RestartSec=5
[Install]
WantedBy=default.target
@@ -1,11 +1,12 @@
[Unit]
Description=Initialize camera (CVS ownership then sensor driver)
Description=Initialize camera (CVS ownership, sensor driver, v4l2loopback)
After=systemd-modules-load.service
Before=graphical.target
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/bash -c "modprobe intel_cvs && sleep 2 && modprobe ov08x40"
ExecStart=/bin/bash -c "modprobe intel_cvs && sleep 2 && modprobe ov08x40 && modprobe v4l2loopback"
[Install]
WantedBy=multi-user.target
@@ -1,52 +1,23 @@
#!/bin/bash
# Re-probe the IPU7 camera sensor after suspend/hibernate resume.
# Handle camera service around suspend/resume.
#
# The OV08X40 sensor connects through a USB-to-I2C bridge (usbio-bridge).
# After resume the ipu_bridge software fwnode graph is gone, leaving the
# sensor driver unable to bind. Removing and rescanning the IPU PCI device
# triggers a fresh probe that recreates the fwnode graph.
IPU_PCI="0000:00:05.0"
# v4l2-relayd must be stopped before suspend to avoid GStreamer crashes,
# then restarted after resume once the camera hardware is ready.
#
# The post-resume restart uses systemd-run to avoid blocking the
# password prompt while waiting for the camera to initialize.
case "$1" in
pre)
systemctl stop v4l2-relayd@ipu7.service 2>/dev/null || true
;;
post)
(
# Wait for the USB-I2C bridge to re-enumerate
for i in $(seq 1 15); do
if grep -q "OVTI08F4" /sys/bus/i2c/devices/*/name 2>/dev/null; then
break
fi
sleep 1
done
sleep 1
# Unload sensor so the IPU device can be cleanly removed
modprobe -r ov08x40 2>/dev/null || true
# Remove and rescan the IPU PCI device to trigger fresh ipu_bridge_init
echo 1 > "/sys/bus/pci/devices/$IPU_PCI/remove" 2>/dev/null || true
sleep 1
echo 1 > /sys/bus/pci/rescan 2>/dev/null || true
sleep 3
# Reload sensor driver
modprobe intel_cvs 2>/dev/null || true
sleep 2
modprobe ov08x40 2>/dev/null || true
# Restart the camera feed service
for uid_dir in /run/user/*; do
uid=$(basename "$uid_dir")
if [[ -S $uid_dir/bus ]]; then
sudo -u "#$uid" env \
XDG_RUNTIME_DIR="$uid_dir" \
DBUS_SESSION_BUS_ADDRESS="unix:path=$uid_dir/bus" \
systemctl --user restart camera-feed-watch.service 2>/dev/null || true
fi
done
) &
disown
systemd-run --no-block --unit=camera-resume bash -c '
systemctl restart camera-init.service 2>/dev/null
systemctl reset-failed v4l2-relayd@ipu7.service 2>/dev/null || true
systemctl start v4l2-relayd@ipu7.service 2>/dev/null || true
'
;;
esac
exit 0
@@ -1,3 +1,19 @@
_add_pipewire_camera() {
local conf="$1"
if [ -f "$conf" ] && ! grep -q 'PipeWireCamera' "$conf"; then
if grep -q 'enable-features=' "$conf"; then
sed -i 's/--enable-features=\([^ ]*\)/--enable-features=\1,PipeWireCamera/' "$conf"
else
echo '--enable-features=PipeWireCamera' >> "$conf"
fi
fi
}
_remove_pipewire_camera() {
local conf="$1"
[ -f "$conf" ] && sed -i 's/,PipeWireCamera//g' "$conf"
}
_install_sleep_hook() {
cp /usr/share/intel-ipu7-camera/camera-sleep-hook /usr/lib/systemd/system-sleep/camera-sleep-hook
chmod 755 /usr/lib/systemd/system-sleep/camera-sleep-hook
@@ -7,44 +23,44 @@ post_install() {
_install_sleep_hook
systemctl daemon-reload
systemctl enable camera-init.service
systemctl --global enable camera-feed-watch.service
systemctl enable v4l2-relayd@ipu7.service
udevadm control --reload-rules 2>/dev/null || true
if [ -n "$SUDO_USER" ]; then
usermod -aG video "$SUDO_USER" 2>/dev/null || true
# Start the service in the current user session if one is active
local uid
uid=$(id -u "$SUDO_USER" 2>/dev/null)
if [ -n "$uid" ] && [ -d "/run/user/$uid" ]; then
XDG_RUNTIME_DIR="/run/user/$uid" \
DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/$uid/bus" \
runuser -u "$SUDO_USER" -- \
systemctl --user start camera-feed-watch.service 2>/dev/null || true
fi
_add_pipewire_camera "/home/$SUDO_USER/.config/chromium-flags.conf"
_add_pipewire_camera "/home/$SUDO_USER/.config/brave-flags.conf"
_add_pipewire_camera "/home/$SUDO_USER/.config/chrome-flags.conf"
fi
}
post_upgrade() {
_install_sleep_hook
systemctl daemon-reload
systemctl enable v4l2-relayd@ipu7.service
# Disable old camera-feed-watch (replaced by v4l2-relayd)
systemctl --global disable camera-feed-watch.service 2>/dev/null || true
udevadm control --reload-rules 2>/dev/null || true
if [ -n "$SUDO_USER" ]; then
_add_pipewire_camera "/home/$SUDO_USER/.config/chromium-flags.conf"
_add_pipewire_camera "/home/$SUDO_USER/.config/brave-flags.conf"
_add_pipewire_camera "/home/$SUDO_USER/.config/chrome-flags.conf"
fi
}
pre_remove() {
systemctl disable v4l2-relayd@ipu7.service 2>/dev/null || true
systemctl stop v4l2-relayd@ipu7.service 2>/dev/null || true
systemctl --global disable camera-feed-watch.service 2>/dev/null || true
systemctl disable camera-init.service 2>/dev/null || true
systemctl stop camera-init.service 2>/dev/null || true
if [ -n "$SUDO_USER" ]; then
local uid
uid=$(id -u "$SUDO_USER" 2>/dev/null)
if [ -n "$uid" ] && [ -d "/run/user/$uid" ]; then
XDG_RUNTIME_DIR="/run/user/$uid" \
DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/$uid/bus" \
runuser -u "$SUDO_USER" -- \
systemctl --user stop camera-feed-watch.service 2>/dev/null || true
fi
_remove_pipewire_camera "/home/$SUDO_USER/.config/chromium-flags.conf"
_remove_pipewire_camera "/home/$SUDO_USER/.config/brave-flags.conf"
_remove_pipewire_camera "/home/$SUDO_USER/.config/chrome-flags.conf"
fi
}
@@ -0,0 +1,13 @@
[Unit]
After=camera-init.service
[Service]
Environment=GST_PLUGIN_PATH=/usr/lib/gstreamer-1.0
# Relax sandboxing for icamerasrc hardware access
PrivateNetwork=no
InaccessibleDirectories=
ReadOnlyDirectories=
DevicePolicy=auto
# Give v4l2-relayd time to initialize, then restart WirePlumber
# so PipeWire re-probes the device with the correct format
ExecStartPost=/bin/bash -c 'sleep 2 && systemctl --user -M 1000@ restart wireplumber.service 2>/dev/null || true'
@@ -0,0 +1,6 @@
VIDEOSRC="icamerasrc device-name=ov08x40-uf sharpness=80 ev=-1 saturation=10 ! videoflip method=rotate-180"
FORMAT=NV12
WIDTH=1920
HEIGHT=1080
FRAMERATE=30/1
CARD_LABEL="Hardware ISP Camera"
@@ -1 +0,0 @@
v4l2loopback