[PATCH] [ALSA] sparc dbri: ring buffered version

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From: Krzysztof Helt (krzysztof.h1@xxxxx)

It is a complete rework of low level layer to work on ring
buffers for comands and data descriptors. This removes annoying
noise due to delay in data buffer switching.

Signed-off-by: Krzysztof Helt (krzysztof.h1@xxxxx)
---
This patch requires the 8 previous patches I sent to the
alsa-devel list.

Now, DBRI commands can be sent without waiting for the previous
ones to finish and data is sent through the DMA continously from
the ring buffer.

With this patch the ALSA DBRI driver reached the sound quality of
the old kernel 2.4 driver.

The driver needs more work (which I try to do in fre time):
- correct support of stereo and mono modes in 8 and 16 bit
- recording

Regards,
Krzysztof Helt

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Attachment: dbri-patch9.diff
Description: Binary data

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