[alsa-devel] [PATCH 1/2 v2] ASoC: soc-cache: block based rbtree compression

Mark Brown broonie at opensource.wolfsonmicro.com
Tue May 3 13:21:25 CEST 2011

On Mon, May 02, 2011 at 01:28:28PM +0100, Dimitris Papastamos wrote:

> Each node manages a block of up to RBTREE_BLOCK_NUM registers.  There can be
> no two nodes with overlapping blocks.  Currently there is no check in the code
> to scream in case that ever happens.  Each block has a base and top register,
> all others lie in between these registers.  Note that variable length blocks
> aren't supported.  So if you have an interval [8, 15] and only some of those
> registers actually exist on the device, the block will have the non-existent
> registers as zero.  There is also no way of reporting that any of those
> non-existent registers were accessed/modified.

As we discussed verbally I'd really rather see this support variable
length blocks and figure out (ideally at init time) which registers
exist.  This avoids all the fiddling around working out what to set the
block size to which seems a lot clearer and cleaner.

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