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change dbri's DMA segment size to a power of two value - the ship allows 

segments up to 0x1fff bytes but even rounded to 32bit this seems to
confuse the rest of the audio code these days
TODO: we don't need to interrupt at every single segment
either way, with this mpg123 doesn't produce semi-random funny noises
anymore
This commit is contained in:
macallan 2011-03-09 05:40:11 +00:00
parent b1563ea6d9
commit c3b14fbfbc
1 changed files with 9 additions and 5 deletions
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14
sys/dev/sbus/dbri.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: dbri.c,v 1.32 2011/01/11 00:49:50 macallan Exp $ */
/* $NetBSD: dbri.c,v 1.33 2011/03/09 05:40:11 macallan Exp $ */
/*
* Copyright (C) 1997 Rudolf Koenig (rfkoenig@immd4.informatik.uni-erlangen.de)
@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dbri.c,v 1.32 2011/01/11 00:49:50 macallan Exp $");
__KERNEL_RCSID(0, "$NetBSD: dbri.c,v 1.33 2011/03/09 05:40:11 macallan Exp $");
#include "audio.h"
#if NAUDIO > 0
@ -1729,8 +1729,12 @@ dbri_round_blocksize(void *hdl, int bs, int mode,
const audio_params_t *param)
{
/* DBRI DMA segment size, rounded down to 32bit alignment */
return 0x1ffc;
/*
* DBRI DMA segment size can be up to 0x1fff, sixes that are not powers
* of two seem to confuse the upper audio layer so we're going with
* 0x1000 here
*/
return 0x1000;
}
static int
@ -1946,7 +1950,7 @@ static size_t
dbri_round_buffersize(void *hdl, int dir, size_t bufsize)
{
#ifdef DBRI_BIG_BUFFER
return 16*0x1ffc; /* use ~128KB buffer */
return 0x20000; /* use 128KB buffer */
#else
return bufsize;
#endif