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Current rsnd driver supports Synchronous SRC Mode, but HW allow to update rate only within 1% from current rate. Adjust to it. Becially, this feature is used to fine-tune subtle difference that occur during sampling rate conversion in SRC. So, it should be called within 1% margin of rate difference. If there was difference over 1%, it will apply with 1% increments by using loop without indicating error message. Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Link: https://patch.msgid.link/871pwd2qe8.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>