From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> [ Upstream commit e0a52220344ab7defe25b9cdd58fe1dc1122e67c ] The amplifier may provide hardware support for I/V feedback, or alternatively the firmware may generate an echo reference attached to the SSP and dailink used for the amplifier. To avoid any issues with invalid/NULL substreams in the latter case, always unconditionally set dpcm_capture. Link: https://github.com/thesofproject/linux/issues/4083 Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx> Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx> Signed-off-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230119163459.2235843-3-kai.vehmanen@xxxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- sound/soc/intel/boards/sof_cs42l42.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/soc/intel/boards/sof_cs42l42.c b/sound/soc/intel/boards/sof_cs42l42.c index e38bd2831e6ac..e9d190cb13b0a 100644 --- a/sound/soc/intel/boards/sof_cs42l42.c +++ b/sound/soc/intel/boards/sof_cs42l42.c @@ -336,6 +336,9 @@ static int create_spk_amp_dai_links(struct device *dev, links[*id].platforms = platform_component; links[*id].num_platforms = ARRAY_SIZE(platform_component); links[*id].dpcm_playback = 1; + /* firmware-generated echo reference */ + links[*id].dpcm_capture = 1; + links[*id].no_pcm = 1; links[*id].cpus = &cpus[*id]; links[*id].num_cpus = 1; -- 2.39.0
