We can skip the unattached Peripherals when programing the scale_index
register. Because the frequency will be set when the Peripheral is
attached. And It is not necessary to program the scale_index if the new
index is the same as the current one.

Bard Liao (2):
  soundwire: don't program SDW_SCP_BUSCLOCK_SCALE on a unattached
    Peripheral
  soundwire: record Peripheral scale_index

 drivers/soundwire/bus.c       |  1 +
 drivers/soundwire/stream.c    | 11 +++++++++++
 include/linux/soundwire/sdw.h |  2 ++
 3 files changed, 14 insertions(+)

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2.43.0