15 Jun
2015
15 Jun
'15
6:42 p.m.
At Mon, 15 Jun 2015 16:57:52 +0100, Mark Brown wrote:
On Thu, Jun 11, 2015 at 10:03:57PM +0530, Vinod Koul wrote:
+config SND_SKL_PREALLOC_SIZE
- int "Pre-allocated buffer size for skylake HD-audio driver"
- range 0 32768
- default 64
Size in units of...?
- help
Specifies the default pre-allocated buffer-size in kB for theHD-audio driver. A larger buffer (e.g. 2048) is preferredfor systems using PulseAudio. The default 64 is chosen justfor compatibility reasons.What are those compatibility reasons - why should users have to worry about this?
... if a user wants to reduce the memory foot print. 2MB buffers for each stream are significant size, supposing that it can have 16 streams.
Should this be a module parameter or something?
The buffers can be reallocated dynamically via procfs in general, but it's not practical and intuitive. That's why the similar option was provided for HDA legacy driver. It was the time when PA started accepted slowly. I don't know whether it makes sense for SKL ASoC driver, though -- it's up to you guys.
Takashi