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Currently, the BCLK/FSYNC enable is addressed in hw_params stage, because the real clk is measured by samplerate. so, it is quite a good solution. But, on the system PM situation, it is failed to recovery BCLK/LRCK after resume. the root cause is that never do 'hw_params' after resume. which is similar to XRUN issue. So, let's move it to prepare stage which any path must do before trigger-start. Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> Change-Id: I9025a98259a4e9bd9f09ec3d23584f753552031d