From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
SoundWire mockup devices don't take part in the command/control
protocol, so all commands will complete with -ENODATA or
Command_Ignored results. With a flag, we can suppress such errors in
the bus management and make it appear as if all read/writes succeed.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
include/linux/soundwire/sdw.h | 3 +++
sound/soc/codecs/sdw-mockup.c | 2 ++
2 files changed, 5 insertions(+)
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index a48ac3e77301..76ce3f3ac0f2 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -661,6 +661,8 @@ struct sdw_slave_ops {
* initialized
* @first_interrupt_done: status flag tracking if the interrupt handling
* for a Slave happens for the first time after enumeration
+ * @is_mockup_device: status flag used to squelch errors in the command/control
+ * protocol for SoundWire mockup devices
*/
struct sdw_slave {
struct sdw_slave_id id;
@@ -683,6 +685,7 @@ struct sdw_slave {
struct completion initialization_complete;
u32 unattach_request;
bool first_interrupt_done;
+ bool is_mockup_device;
};
#define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)
diff --git a/sound/soc/codecs/sdw-mockup.c b/sound/soc/codecs/sdw-mockup.c
index a4f79eb2c69d..8ea13cfa9f8e 100644
--- a/sound/soc/codecs/sdw-mockup.c
+++ b/sound/soc/codecs/sdw-mockup.c
@@ -263,6 +263,8 @@ static int sdw_mockup_sdw_probe(struct sdw_slave *slave,
dev_set_drvdata(dev, sdw_mockup);
sdw_mockup->slave = slave;
+ slave->is_mockup_device = true;
+
ret = devm_snd_soc_register_component(dev,
&snd_soc_sdw_mockup_component,
sdw_mockup_dai,
--
2.17.1
