Date: Sat, 27 Jun 2026 09:55:56 +0000 From: Christos Margiolis <christos@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: e9df33a044ec - stable/15 - sound: Retire SD_F_VPC and related settings Message-ID: <6a3f9e2c.30eb1.59fe67ac@gitrepo.freebsd.org>
index | next in thread | raw e-mail
The branch stable/15 has been updated by christos: URL: https://cgit.FreeBSD.org/src/commit/?id=e9df33a044ecd34f4b007f70a1416b0d0544321e commit e9df33a044ecd34f4b007f70a1416b0d0544321e Author: Christos Margiolis <christos@FreeBSD.org> AuthorDate: 2026-06-20 17:32:21 +0000 Commit: Christos Margiolis <christos@FreeBSD.org> CommitDate: 2026-06-27 09:55:19 +0000 sound: Retire SD_F_VPC and related settings VPC is enabled by default, and the only way to turn it off is through a loader hint. That being said, there is no benefit to turning it off in the first place, because VPC provides more fine-grained volume control, as well as access to the SNDCTL_DSP_[SET|GET][REC|PLAY]VOL ioctls and dsp_ioctl_channel(). Sponsored by: The FreeBSD Foundation MFC after: 1 week (cherry picked from commit f70a687bb071cdee60dc7420d75fa1dd122af51a) --- share/man/man4/pcm.4 | 22 +--------------------- sys/dev/sound/pcm/dsp.c | 2 +- sys/dev/sound/pcm/feeder_chain.c | 4 ++-- sys/dev/sound/pcm/sound.c | 4 ---- sys/dev/sound/pcm/sound.h | 4 ++-- 5 files changed, 6 insertions(+), 30 deletions(-) diff --git a/share/man/man4/pcm.4 b/share/man/man4/pcm.4 index 14d7e52eed5d..7a0059f43f73 100644 --- a/share/man/man4/pcm.4 +++ b/share/man/man4/pcm.4 @@ -23,7 +23,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd May 15, 2026 +.Dd June 20, 2026 .Dt SOUND 4 .Os .Sh NAME @@ -212,26 +212,6 @@ application, without touching the master .Nm volume. This is sometimes referred to as Volume Per Channel (VPC). -The VPC feature is enabled by default. -.Ss Loader Tunables -The following loader tunables are used to set driver configuration at the -.Xr loader 8 -prompt before booting the kernel, or they can be stored in -.Pa /boot/loader.conf -in order to automatically set them before booting the kernel. -It is also possible to use -.Xr kenv 1 -to change these tunables before loading the -.Nm -driver. -The following tunables can not be changed during runtime using -.Xr sysctl 8 . -.Bl -tag -width indent -.It Va hint.pcm.%d.vpc -Set to 1 or 0 to explicitly enable (1) or disable (0) the VPC feature. -This tunable is undefined by default. -VPC is however enabled by default. -.El .Ss Runtime Configuration There are a number of .Xr sysctl 8 diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c index 7e4b4ae2df24..0557b03484dc 100644 --- a/sys/dev/sound/pcm/dsp.c +++ b/sys/dev/sound/pcm/dsp.c @@ -542,7 +542,7 @@ dsp_ioctl_channel(struct dsp_cdevpriv *priv, struct pcm_channel *ch, int j, left, right, center, mute; d = priv->sc; - if (!PCM_REGISTERED(d) || !(pcm_getflags(d->dev) & SD_F_VPC)) + if (!PCM_REGISTERED(d)) return (-1); PCM_UNLOCKASSERT(d); diff --git a/sys/dev/sound/pcm/feeder_chain.c b/sys/dev/sound/pcm/feeder_chain.c index 35bb12a062ec..1dbdf2fcc0e4 100644 --- a/sys/dev/sound/pcm/feeder_chain.c +++ b/sys/dev/sound/pcm/feeder_chain.c @@ -714,8 +714,8 @@ feeder_chain(struct pcm_channel *c) cdesc.dummy = 1; if ((softfmt & AFMT_CONVERTIBLE) && - (((d->flags & SD_F_VPC) && !(c->flags & CHN_F_HAS_VCHAN)) || - (!(d->flags & SD_F_VPC) && (d->flags & SD_F_SOFTPCMVOL) && + (!(c->flags & CHN_F_HAS_VCHAN) || + ((d->flags & SD_F_SOFTPCMVOL) && !(c->flags & CHN_F_VIRTUAL)))) cdesc.use_volume = 1; diff --git a/sys/dev/sound/pcm/sound.c b/sys/dev/sound/pcm/sound.c index 235142eb5209..101b38367873 100644 --- a/sys/dev/sound/pcm/sound.c +++ b/sys/dev/sound/pcm/sound.c @@ -355,10 +355,6 @@ pcm_init(device_t dev, void *devinfo) cv_init(&d->cv, device_get_nameunit(dev)); i = 0; - if (resource_int_value(device_get_name(dev), device_get_unit(dev), - "vpc", &i) != 0 || i != 0) - d->flags |= SD_F_VPC; - if (resource_int_value(device_get_name(dev), device_get_unit(dev), "bitperfect", &i) == 0 && i != 0) d->flags |= SD_F_BITPERFECT; diff --git a/sys/dev/sound/pcm/sound.h b/sys/dev/sound/pcm/sound.h index 06de95e461ec..becd787a456a 100644 --- a/sys/dev/sound/pcm/sound.h +++ b/sys/dev/sound/pcm/sound.h @@ -101,7 +101,7 @@ struct snd_mixer; #define SD_F_MPSAFE 0x00000010 #define SD_F_REGISTERED 0x00000020 #define SD_F_BITPERFECT 0x00000040 -#define SD_F_VPC 0x00000080 /* volume-per-channel */ +/* unused 0x00000080 */ /* unused 0x00000100 */ #define SD_F_EQ_ENABLED 0x00000200 /* EQ enabled */ /* unused 0x00000400 */ @@ -117,7 +117,7 @@ struct snd_mixer; "\005MPSAFE" \ "\006REGISTERED" \ "\007BITPERFECT" \ - "\010VPC" \ + /* "\010 */ \ /* "\011 */ \ "\012EQ_ENABLED" \ /* "\013 */ \home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6a3f9e2c.30eb1.59fe67ac>