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authorTakashi Iwai <tiwai@suse.de>2020-11-23 09:53:45 +0100
committerTakashi Iwai <tiwai@suse.de>2020-11-23 15:17:24 +0100
commit62abd092f97b33a33fcdb98c30bc01f2b1c55d04 (patch)
tree15532ccf444ab91345aa4a3c1ee0a7c5e7acaca4 /Documentation/sound
parent83b7dcbc51c930fc2079ab6c6fc9d719768321f1 (diff)
downloadlwn-62abd092f97b33a33fcdb98c30bc01f2b1c55d04.tar.gz
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ALSA: usb-audio: Add implicit_fb module option
A new module option, implicit_fb, is added to specify the driver looking for the implicit feedback sync. This can be useful for a device that could be working better in the implicit feed back mode and user wants to test it quickly. When this works, we can add the quirk entry easily. Tested-by: Keith Milner <kamilner@superlative.org> Tested-by: Dylan Robinson <dylan_robinson@motu.com> Link: https://lore.kernel.org/r/20201123085347.19667-40-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa-configuration.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst
index c755b1c5e16f..fe52c314b763 100644
--- a/Documentation/sound/alsa-configuration.rst
+++ b/Documentation/sound/alsa-configuration.rst
@@ -2227,6 +2227,11 @@ quirk_alias
Quirk alias list, pass strings like ``0123abcd:5678beef``, which
applies the existing quirk for the device 5678:beef to a new
device 0123:abcd.
+implicit_fb
+ Apply the generic implicit feedback sync mode. When this is set
+ and the playback stream sync mode is ASYNC, the driver tries to
+ tie an adjacent ASYNC capture stream as the implicit feedback
+ source.
use_vmalloc
Use vmalloc() for allocations of the PCM buffers (default: yes).
For architectures with non-coherent memory like ARM or MIPS, the