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Subject[PATCH 0/2] soundwire: Remove redundant zeroing of page registers
Date
Writing zero to the page registers after each message transaction can add
up to a lot of overhead for codecs that need to transfer large amount of
data - for example a firmware download.

There's no spec reason I can see for this zeroing. The page registers are
only used for a paged address. The bus code uses a non-paged address for
registers in page 0. It always writes the page registers at the start of
a paged transaction.

If this zeroing was a workaround for anything, let me know and I will
re-implement the zeroing as a quirk that can be enabled only when it is
necessary.

Richard Fitzgerald (2):
soundwire: bus: Don't zero page registers after every transaction
soundwire: bus: Remove unused reset_page_addr() callback

drivers/soundwire/bus.c | 23 -----------------------
drivers/soundwire/cadence_master.c | 14 --------------
drivers/soundwire/cadence_master.h | 3 ---
drivers/soundwire/intel_auxdevice.c | 1 -
include/linux/soundwire/sdw.h | 3 ---
5 files changed, 44 deletions(-)

--
2.30.2

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