[PATCH 5.10 03/22] ASoC: Intel: sof_sdw: tag SoundWire BEs as non-atomic

Greg Kroah-Hartman
2021-10-14T15:02:59Z

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit 58eafe1ff52ee1ce255759fc15729519af180cbb ]

The SoundWire BEs make use of 'stream' functions for .prepare and
.trigger. These functions will in turn force a Bank Switch, which
implies a wait operation.

Mark SoundWire BEs as nonatomic for consistency, but keep all other
types of BEs as is. The initialization of .nonatomic is done outside
of the create_sdw_dailink helper to avoid adding more parameters to
deal with a single exception to the rule that BEs are atomic.

Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <bard.liao@intel.com>
Link: https://lore.kernel.org/r/20210907184436.33152-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/intel/boards/sof_sdw.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index 2770e8179983..25548555d8d7 100644
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -847,6 +847,11 @@ static int create_sdw_dailink(struct device *dev, int *be_index,
cpus + *cpu_id, cpu_dai_num,
codecs, codec_num,
NULL, &sdw_ops);
+ /*
+ * SoundWire DAILINKs use 'stream' functions and Bank Switch operations
+ * based on wait_for_completion(), tag them as 'nonatomic'.
+ */
+ dai_links[*be_index].nonatomic = true;

ret = set_codec_init_func(link, dai_links + (*be_index)++,
playback, group_id);
--
2.33.0