Re: [rfc] i810_audio: offset LVI from CIV to avoid stalled start

[Herbert Xu]

On Mon, Jan 17, 2005 at 04:44:22PM -0500, John W. Linville wrote:
> 
> Enemy Territory is available for free (as in beer) download from
> www.enemy-territory.com.  Sound plays almost immediately once the
> game is started.
> 
> Is this sufficient?

Sure, I don't mind trying it out :)

In the mean time, does this patch fix your problem as well?

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
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===== sound/oss/i810_audio.c 1.76 vs edited =====
--- 1.76/sound/oss/i810_audio.c	2005-01-08 16:44:18 +11:00
+++ edited/sound/oss/i810_audio.c	2005-01-18 10:20:42 +11:00
@@ -1196,18 +1196,21 @@
 	if (count < fragsize)
 		return;
 
+	/* MASKP2(swptr, fragsize) - 1 is the tail of our transfer */
+	x = MODULOP2(MASKP2(dmabuf->swptr, fragsize) - 1, dmabuf->dmasize);
+	x >>= dmabuf->fragshift;
+
 	if (!dmabuf->enable && dmabuf->ready) {
 		if (!(dmabuf->trigger & trigger))
 			return;
 
+		I810_IOWRITEB(x, state->card, port + OFF_LVI);
 		start(state);
 		while (!(I810_IOREADB(state->card, port + OFF_CR) & ((1<<4) | (1<<2))))
 			;
+		return;
 	}
 
-	/* MASKP2(swptr, fragsize) - 1 is the tail of our transfer */
-	x = MODULOP2(MASKP2(dmabuf->swptr, fragsize) - 1, dmabuf->dmasize);
-	x >>= dmabuf->fragshift;
 	I810_IOWRITEB(x, state->card, port + OFF_LVI);
 }