On the 1824c output channel 4 left/right is the S/PDIF output,
so this needs to be able to be set.
I'm guessing that for the 1810c since it has no output channel 4,
it does not matter what the gain value of this channel is set to.
Signed-off-by: Roy Vegard Ovesen <roy.vegard.ovesen@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
A reasonable initial mix for the 1824c is the one that
Presonus Universal Control calls bypass.
It mutes all the physical inputs, and connects
Daw channel 1 to Line out channel 1 (left)
Daw channel 2 to Line out channel 2 (right)
Daw channel 3 to Line out channel 3 (left)
etc.
To get the most out of the 1824c a mixer application like
Universal Control is needed. One is available for linux
Link: https://github.com/royvegard/baton
Signed-off-by: Roy Vegard Ovesen <roy.vegard.ovesen@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The 1824c does not have the A/B switch that the 1810c has,
but instead it has a mono main switch that sums the two
main output channels to mono.
Signed-off-by: Roy Vegard Ovesen <roy.vegard.ovesen@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This is another code cleanup by replacing the manual mutex or spinlock
with guard() macros. usb_audio_disconnect() is slightly refactored
(split to another function) to apply guard() cleanly, but the rest are
rather straightforward conversions.
No functional changes but only code refactoring.
Link: https://patch.msgid.link/20250811082019.31052-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The variable c is being initialized in an outer for-loop and also
re-initialized inside an inner for-loop. The first initialization
is redundant and can be removed.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220207140617.341172-1-colin.i.king@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The struct s1810c_state_packet contains the array in the first field
hence zero-initialization requires a more couple of braces. Fix the
compile warning pointing it out:
sound/usb/mixer_s1810c.c: In function 'snd_sc1810c_get_status_field':
sound/usb/mixer_s1810c.c:178:9: warning: missing braces around initializer [-Wmissing-braces]
Reported-by: kbuild test robot <lkp@intel.com>
Fixes: 8dc5efe3d1 ("ALSA: usb-audio: Add support for Presonus Studio 1810c")
Link: https://lore.kernel.org/r/202002210251.WgMfvKJP%lkp@intel.com
Link: https://lore.kernel.org/r/20200306081231.7940-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This patch adds support for Presonus Studio 1810c, a usb interface
that's UAC2 compliant with a few quirks and a few extra hw-specific
controls. I've tested all 3 altsettings and the added switch
controls and they work as expected.
More infos on the card:
https://www.presonus.com/products/Studio-1810c
Note that this work is based on packet inspection with
usbmon. I just wanted to get this card to work for using
it on our open-source radio station:
https://github.com/UoC-Radio
v2 address issues reported by Takashi:
* Properly get/set enum type controls
* Prevent race condition on switch_get/set
* Various control naming changes
* Various coding style fixes
v3 improve readability of sample rate filtering
and some other minor changes.
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Link: https://lore.kernel.org/r/5e47481a.1c69fb81.befb3.8dac@mx.google.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Roy Vegard Ovesen