Dne 09. 02. 21 v 22:01 Hans de Goede napsal(a): > There used to be an issue with the HeadsetMic on BYT devices with > a rt5672 codec only being recorded on the left channel, while the > right channel recorded silence. > > The ucm2/codecs/rt5672/HeadsetMic.conf contains a workaround for > this which changes the SST record-stream demuxer settings to > use "slot 0" for both the left and right channels when recording > from the HeadsetMic. > > There are 2 problems with this workaround: > > 1. It uses SST specific mixer settings causing things to break > when using the SOF driver. > > 2. Files under uc2m/codecs should be architecture agnostic and should > not depend on platform dependent mixer settings such as the SST driver > mixer settings. > > The problem which the workaround used to work around has since been > fixed in the kernel by switching the wire format from TDM/DSP A to I2S: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ceb8a36d023d4bb4ffca3474a452fb1dfaa0ef2 > > This fix has landed in 5.8 and has been backported to all recent > stable kernel releases. > > Since this is fixed in the kernel now, we can drop the workaround, > fixing the 2 problems mentioned above. > > This was tested on a ThinkPad 8 tablet, which is the same device as > where the HeadsetMic problem was originally noticed. > > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> The patch was applied to the alsa-ucm-conf repository. Jaroslav -- Jaroslav Kysela <perex@xxxxxxxx> Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
