Bamboo Panda

✏️ Editing: 78-sound-card.rules

# do not edit this file, it will be overwritten on update

SUBSYSTEM!="sound", GOTO="sound_end"

ACTION=="add|change", KERNEL=="controlC*", ATTR{../uevent}="change"
ACTION!="change", GOTO="sound_end"

# Ok, we probably need a little explanation here for what the two lines above
# are good for.
#
# The story goes like this: when ALSA registers a new sound card it emits a
# series of 'add' events to userspace, for the main card device and for all the
# child device nodes that belong to it. udev relays those to applications,
# however only maintains the order between father and child, but not between
# the siblings. The control device node creation can be used as synchronization
# point. All other devices that belong to a card are created in the kernel
# before it. However unfortunately due to the fact that siblings are forwarded
# out of order by udev this fact is lost to applications.
#
# OTOH before an application can open a device it needs to make sure that all
# its device nodes are completely created and set up.
#
# As a workaround for this issue we have added the udev rule above which will
# generate a 'change' event on the main card device from the 'add' event of the
# card's control device. Due to the ordering semantics of udev this event will
# only be relayed after all child devices have finished processing properly.
# When an application needs to listen for appearing devices it can hence look
# for 'change' events only, and ignore the actual 'add' events.
#
# When the application is initialized at the same time as a device is plugged
# in it may need to figure out if the 'change' event has already been triggered
# or not for a card. To find that out we store the flag environment variable
# SOUND_INITIALIZED on the device which simply tells us if the card 'change'
# event has already been processed.

KERNEL!="card*", GOTO="sound_end"

ENV{SOUND_INITIALIZED}="1"

IMPORT{builtin}="hwdb"
SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
SUBSYSTEMS=="usb", GOTO="skip_pci"

SUBSYSTEMS=="firewire", ATTRS{guid}=="?*", \
  ENV{ID_BUS}="firewire", ENV{ID_SERIAL}="$attr{guid}", ENV{ID_SERIAL_SHORT}="$attr{guid}", \
  ENV{ID_VENDOR_ID}="$attr{vendor}", ENV{ID_MODEL_ID}="$attr{model}", \
  ENV{ID_VENDOR}="$attr{vendor_name}", ENV{ID_MODEL}="$attr{model_name}"
SUBSYSTEMS=="firewire", GOTO="skip_pci"

SUBSYSTEMS=="pci", ENV{ID_BUS}="pci", ENV{ID_VENDOR_ID}="$attr{vendor}", ENV{ID_MODEL_ID}="$attr{device}"
SUBSYSTEMS=="pci", GOTO="skip_pci"

# If we reach here, the device nor any of its parents are USB/PCI/firewire bus devices.
# If we now find a parent that is a platform device, assume that we're working with
# an internal sound card.
SUBSYSTEMS=="platform", ENV{SOUND_FORM_FACTOR}="internal", GOTO="sound_end"

LABEL="skip_pci"

# Define ID_ID if ID_BUS and ID_SERIAL are set. This will work for both
# USB and firewire.
ENV{ID_SERIAL}=="?*", ENV{ID_USB_INTERFACE_NUM}=="?*", ENV{ID_ID}="$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_USB_INTERFACE_NUM}"
ENV{ID_SERIAL}=="?*", ENV{ID_USB_INTERFACE_NUM}=="", ENV{ID_ID}="$env{ID_BUS}-$env{ID_SERIAL}"

IMPORT{builtin}="path_id"

# The values used here for $SOUND_FORM_FACTOR and $SOUND_CLASS should be kept
# in sync with those defined for PulseAudio's src/pulse/proplist.h
# PA_PROP_DEVICE_FORM_FACTOR, PA_PROP_DEVICE_CLASS properties.

# If the first PCM device of this card has the pcm class 'modem', then the card is a modem
ATTR{pcmC%nD0p/pcm_class}=="modem", ENV{SOUND_CLASS}="modem", GOTO="sound_end"

# Identify cards on the internal PCI bus as internal
SUBSYSTEMS=="pci", DEVPATH=="*/0000:00:??.?/sound/*", ENV{SOUND_FORM_FACTOR}="internal", GOTO="sound_end"

# Devices that also support Image/Video interfaces are most likely webcams
SUBSYSTEMS=="usb", ENV{ID_USB_INTERFACES}=="*:0e????:*", ENV{SOUND_FORM_FACTOR}="webcam", GOTO="sound_end"

# Matching on the model strings is a bit ugly, I admit
ENV{ID_MODEL}=="*[Ss]peaker*", ENV{SOUND_FORM_FACTOR}="speaker", GOTO="sound_end"
ENV{ID_MODEL_FROM_DATABASE}=="*[Ss]peaker*", ENV{SOUND_FORM_FACTOR}="speaker", GOTO="sound_end"

ENV{ID_MODEL}=="*[Hh]eadphone*", ENV{SOUND_FORM_FACTOR}="headphone", GOTO="sound_end"
ENV{ID_MODEL_FROM_DATABASE}=="*[Hh]eadphone*", ENV{SOUND_FORM_FACTOR}="headphone", GOTO="sound_end"

ENV{ID_MODEL}=="*[Hh]eadset*", ENV{SOUND_FORM_FACTOR}="headset", GOTO="sound_end"
ENV{ID_MODEL_FROM_DATABASE}=="*[Hh]eadset*", ENV{SOUND_FORM_FACTOR}="headset", GOTO="sound_end"

ENV{ID_MODEL}=="*[Hh]andset*", ENV{SOUND_FORM_FACTOR}="handset", GOTO="sound_end"
ENV{ID_MODEL_FROM_DATABASE}=="*[Hh]andset*", ENV{SOUND_FORM_FACTOR}="handset", GOTO="sound_end"

ENV{ID_MODEL}=="*[Mm]icrophone*", ENV{SOUND_FORM_FACTOR}="microphone", GOTO="sound_end"
ENV{ID_MODEL_FROM_DATABASE}=="*[Mm]icrophone*", ENV{SOUND_FORM_FACTOR}="microphone", GOTO="sound_end"

LABEL="sound_end"

T	Name	Size
📁	..	-
📄	10-dm.rules	7.32 KB
📄	11-dm-lvm.rules	2.57 KB
📄	11-dm-parts.rules	1.41 KB
📄	13-dm-disk.rules	2.25 KB
📄	40-elevator.rules	728.00 B
📄	40-redhat.rules	1.97 KB
📄	40-usb-blacklist.rules	458.00 B
📄	50-udev-default.rules	5.28 KB
📄	60-autosuspend.rules	704.00 B
📄	60-block.rules	703.00 B
📄	60-cdrom_id.rules	1.05 KB
📄	60-drm.rules	413.00 B
📄	60-evdev.rules	990.00 B
📄	60-fido-id.rules	491.00 B
📄	60-input-id.rules	282.00 B
📄	60-net.rules	129.00 B
📄	60-persistent-alsa.rules	616.00 B
📄	60-persistent-input.rules	2.66 KB
📄	60-persistent-storage-tape.rules	2.15 KB
📄	60-persistent-storage.rules	10.65 KB
📄	60-persistent-v4l.rules	769.00 B
📄	60-sensor.rules	1.58 KB
📄	60-serial.rules	1.11 KB
📄	60-tpm-udev.rules	243.00 B
📄	61-scsi-sg3_id.rules	6.21 KB
📄	63-fc-wwpn-id.rules	624.00 B
📄	63-scsi-sg3_symlink.rules	2.90 KB
📄	64-btrfs.rules	616.00 B
📄	65-scsi-cciss_id.rules	732.00 B
📄	66-kpartx.rules	1.36 KB
📄	68-del-part-nodes.rules	1.12 KB
📄	69-dm-lvm.rules	3.61 KB
📄	70-camera.rules	281.00 B
📄	70-joystick.rules	432.00 B
📄	70-memory.rules	184.00 B
📄	70-mouse.rules	734.00 B
📄	70-power-switch.rules	576.00 B
📄	70-touchpad.rules	473.00 B
📄	70-uaccess.rules	3.66 KB
📄	71-prefixdevname.rules	403.00 B
📄	71-seat.rules	3.73 KB
📄	73-seat-late.rules	643.00 B
📄	75-net-description.rules	512.00 B
📄	75-probe_mtd.rules	174.00 B
📄	78-sound-card.rules	4.70 KB
📄	80-drivers.rules	600.00 B
📄	80-net-setup-link.rules	295.00 B
📄	81-net-dhcp.rules	528.00 B
📄	84-nm-drivers.rules	533.00 B
📄	85-nm-unmanaged.rules	1.97 KB
📄	90-nm-thunderbolt.rules	588.00 B
📄	90-pipewire-alsa.rules	13.36 KB
📄	90-vconsole.rules	489.00 B
📄	91-drm-modeset.rules	56.00 B
📄	95-dm-notify.rules	483.00 B
📄	95-upower-hid.rules	7.92 KB
📄	95-upower-wup.rules	354.00 B
📄	98-kexec.rules	906.00 B
📄	99-nfs.rules	95.00 B
📄	99-systemd.rules	4.92 KB
📄	99-vmware-scsi-udev.rules	459.00 B
📄	README	435.00 B