[src/netbsd-9]: src/sys Pull up following revision(s) (requested by nia in ti...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/239e26e358fd
branches:  netbsd-9
changeset: 744194:239e26e358fd
user:      martin <martin%NetBSD.org@localhost>
date:      Mon Jan 27 07:06:02 2020 +0000

description:
Pull up following revision(s) (requested by nia in ticket #657):

        sys/dev/files.audio: revision 1.13
        sys/dev/files.audio: revision 1.14
        sys/arch/amd64/conf/GENERIC: revision 1.559
        sys/arch/evbarm/conf/GENERIC: revision 1.71
        sys/arch/evbarm/conf/GENERIC64: revision 1.134
        sys/dev/audio/audiodef.h: revision 1.8

Set AUDIO_BLK_MS=4 - unlikely to cause significant overhead on non-m68k.

Several of us have been setting this in /etc/sysctl.conf for months, to
get better performance from applications that require synced audio, etc.
It's also mentioned as a good value with low overhead on most archs here:
href="https://mail-index.netbsd.org/tech-kern/2019/12/07/msg025830.html

We could probably go lower, but this is low enough to make most/all
software run well, removing frame drops. It's also low enough to get
emulators/mednafen to stop complaining in the console.

defopt AUDIO_BLK_MS

Follow amd64 and set AUDIO_BLK_MS=4 by default

defopt -> defparam (oops)

diffstat:

 sys/arch/amd64/conf/GENERIC    |  7 +++++--
 sys/arch/evbarm/conf/GENERIC   |  3 ++-
 sys/arch/evbarm/conf/GENERIC64 |  3 ++-
 sys/dev/audio/audiodef.h       |  6 +++++-
 sys/dev/files.audio            |  4 +++-
 5 files changed, 17 insertions(+), 6 deletions(-)

diffs (95 lines):

diff -r 5fa9f2b5409a -r 239e26e358fd sys/arch/amd64/conf/GENERIC
--- a/sys/arch/amd64/conf/GENERIC       Sun Jan 26 11:29:39 2020 +0000
+++ b/sys/arch/amd64/conf/GENERIC       Mon Jan 27 07:06:02 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.531.2.7 2020/01/21 11:55:57 martin Exp $
+# $NetBSD: GENERIC,v 1.531.2.8 2020/01/27 07:06:02 martin Exp $
 #
 # GENERIC machine description file
 #
@@ -22,7 +22,7 @@
 
 options        INCLUDE_CONFIG_FILE     # embed config file in kernel binary
 
-#ident         "GENERIC-$Revision: 1.531.2.7 $"
+#ident         "GENERIC-$Revision: 1.531.2.8 $"
 
 maxusers       64              # estimated number of users
 
@@ -55,6 +55,9 @@
 
 options        INSECURE        # disable kernel security levels - X needs this
 
+options                AUDIO_BLK_MS=4  # make software with low latency needs performant
+                               # no substantial CPU overhead on this platform
+
 options        RTC_OFFSET=0    # hardware clock is this many mins. west of GMT
 options        NTP             # NTP phase/frequency locked loop
 
diff -r 5fa9f2b5409a -r 239e26e358fd sys/arch/evbarm/conf/GENERIC
--- a/sys/arch/evbarm/conf/GENERIC      Sun Jan 26 11:29:39 2020 +0000
+++ b/sys/arch/evbarm/conf/GENERIC      Mon Jan 27 07:06:02 2020 +0000
@@ -1,5 +1,5 @@
 #
-#      $NetBSD: GENERIC,v 1.48.2.5 2019/12/08 12:57:21 martin Exp $
+#      $NetBSD: GENERIC,v 1.48.2.6 2020/01/27 07:06:02 martin Exp $
 #
 #      GENERIC ARM (aarch32) kernel
 #
@@ -614,6 +614,7 @@
 sunxicodec*    at fdt?                 # Allwinner audio codec
 sunxii2s*      at fdt?                 # I2S/PCM
 audio*                 at audiobus?
+options        AUDIO_BLK_MS=4
 spkr*          at audio?
 
 # SDMMC
diff -r 5fa9f2b5409a -r 239e26e358fd sys/arch/evbarm/conf/GENERIC64
--- a/sys/arch/evbarm/conf/GENERIC64    Sun Jan 26 11:29:39 2020 +0000
+++ b/sys/arch/evbarm/conf/GENERIC64    Mon Jan 27 07:06:02 2020 +0000
@@ -1,5 +1,5 @@
 #
-#      $NetBSD: GENERIC64,v 1.103.2.7 2020/01/21 10:39:58 martin Exp $
+#      $NetBSD: GENERIC64,v 1.103.2.8 2020/01/27 07:06:02 martin Exp $
 #
 #      GENERIC ARM (aarch64) kernel
 #
@@ -426,6 +426,7 @@
 a64acodec*     at fdt?                 # Allwinner A64 audio codec (analog part)
 sunxii2s*      at fdt?                 # Allwinner I2S/PCM
 audio*         at audiobus?
+options        AUDIO_BLK_MS=4
 
 spkr*          at audio?               # PC speaker (synthesized)
 
diff -r 5fa9f2b5409a -r 239e26e358fd sys/dev/audio/audiodef.h
--- a/sys/dev/audio/audiodef.h  Sun Jan 26 11:29:39 2020 +0000
+++ b/sys/dev/audio/audiodef.h  Mon Jan 27 07:06:02 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: audiodef.h,v 1.7 2019/07/06 12:58:58 isaki Exp $       */
+/*     $NetBSD: audiodef.h,v 1.7.2.1 2020/01/27 07:06:02 martin Exp $  */
 
 /*
  * Copyright (C) 2017 Tetsuya Isaki. All rights reserved.
@@ -29,6 +29,10 @@
 #ifndef _SYS_DEV_AUDIO_AUDIODEF_H_
 #define _SYS_DEV_AUDIO_AUDIODEF_H_
 
+#ifdef _KERNEL_OPT
+#include "opt_audio.h"
+#endif
+
 /* Number of HW buffer's blocks. */
 #define NBLKHW (3)
 
diff -r 5fa9f2b5409a -r 239e26e358fd sys/dev/files.audio
--- a/sys/dev/files.audio       Sun Jan 26 11:29:39 2020 +0000
+++ b/sys/dev/files.audio       Mon Jan 27 07:06:02 2020 +0000
@@ -1,4 +1,6 @@
-#      $NetBSD: files.audio,v 1.12 2019/05/08 13:40:17 isaki Exp $
+#      $NetBSD: files.audio,v 1.12.2.1 2020/01/27 07:06:02 martin Exp $
+
+defparam opt_audio.h   AUDIO_BLK_MS
 
 define audiobus        { }
 define midibus         { }