From 62abd092f97b33a33fcdb98c30bc01f2b1c55d04 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 23 Nov 2020 09:53:45 +0100 Subject: 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 Tested-by: Dylan Robinson Link: https://lore.kernel.org/r/20201123085347.19667-40-tiwai@suse.de Signed-off-by: Takashi Iwai --- Documentation/sound/alsa-configuration.rst | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/sound/alsa-configuration.rst') 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 -- cgit v1.2.3