The SDW_SCP_BUSCLOCK_SCALE register will be programmed when the
Peripheral is attached. We can and should skip programming the
SDW_SCP_BUSCLOCK_SCALE register when the Peripheral is unattached.
Fixes: 645291cfe5e5 ("Soundwire: stream: program BUSCLOCK_SCALE")
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Simon Trimmer <simont@opensource.cirrus.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
---
drivers/soundwire/stream.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 4ed8fb7663ad..0b9626838028 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -697,6 +697,13 @@ static int sdw_program_params(struct sdw_bus *bus, bool prepare)
if (scale_index < 0)
return scale_index;
+ /* Skip the unattached Peripherals */
+ if (!completion_done(&slave->enumeration_complete)) {
+ dev_warn(&slave->dev,
+ "Not enumerated, skip programming BUSCLOCK_SCALE\n");
+ continue;
+ }
+
ret = sdw_write_no_pm(slave, addr1, scale_index);
if (ret < 0) {
dev_err(&slave->dev, "SDW_SCP_BUSCLOCK_SCALE register write failed\n");
--
2.43.0