Re: [2.6.0-test6] Scratchy sound with via82xx (VT8233)

[James Stevenson]

On Mon, 6 Oct 2003, Takashi Iwai wrote:

> At Thu, 2 Oct 2003 21:05:59 +0100 (IST),
> James Stevenson wrote:
> > 
> > > > 
> > > > I saw the note about dxs_support, but I have the driver built-in. How do I set
> > > > dxs_support from the /proc/cmdline?
> > > 
> > > pass via boot parameter:
> > > 
> > >   snd-via82xx=1,0,,-1,48000,XXX
> > > 
> > > where XXX is the value from 0 to 3 for dxs_support.
> > > see the comment in sound/via82xx.c.
> > 
> > 
> > will this work for a 2.4.x kernel as well ?
> 
> only if the driver is built in the kernel...

Actually i found a different solution to my problem.
This patch against 2.4.22 seems to sort out my troubles.

Was running this on saturday for around 6/7 hours didnt
skip once. From a problem that used to badly effect me
everytime large windows were redrawn in X like a X virtual
screen switch.


--- via82cxxx_audio.c	1 Sep 2003 10:50:01 -0000	1.1.1.16
+++ via82cxxx_audio.c	4 Oct 2003 10:58:44 -0000
@@ -79,14 +79,14 @@
 #define VIA_COUNTER_LIMIT	100000
 
 /* size of DMA buffers */
-#define VIA_MAX_BUFFER_DMA_PAGES	32
+#define VIA_MAX_BUFFER_DMA_PAGES	128
 
 /* buffering default values in ms */
 #define VIA_DEFAULT_FRAG_TIME		20
-#define VIA_DEFAULT_BUFFER_TIME		500
+#define VIA_DEFAULT_BUFFER_TIME		100
 
 /* the hardware has a 256 fragment limit */
-#define VIA_MIN_FRAG_NUMBER		2
+#define VIA_MIN_FRAG_NUMBER		16
 #define VIA_MAX_FRAG_NUMBER		128
 
 #define VIA_MAX_FRAG_SIZE		PAGE_SIZE


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