Re: [PATCH v2 0/2] soundwire: Remove redundant zeroing of page registers

From: Vinod Koul
Date: Tue Jan 31 2023 - 07:06:36 EST


On 23-01-23, 16:49, Richard Fitzgerald wrote:
> 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.

Applied, thanks

--
~Vinod