On Mon, 10 Aug 2020 10:24:00 +0200, Hector Martin wrote:
Further investigation of the L-R swap problem on the MS2109 reveals that the problem isn't that the channels are swapped, but rather that they are swapped and also out of phase by one sample. In other words, the issue is actually that the very first frame that comes from the hardware is a half-frame containing only the right channel, and after that everything becomes offset.
So introduce a new quirk field to drop the very first 2 bytes that come in after the format is configured and a capture stream starts. This puts the channels in phase and in the correct order.
Cc: stable@vger.kernel.org Signed-off-by: Hector Martin marcan@marcan.st
Hm, that's fairly weird behavior, but the workaround looks simple enough, so now I applied as is.
thanks,
Takashi