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ALSA: virtio: Add missing 384 kHz PCM rate mapping

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The VirtIO sound UAPI defines VIRTIO_SND_PCM_RATE_384000, and ALSA
has SNDRV_PCM_RATE_384000. However, virtio-snd's rate conversion
tables stop at 192 kHz.

A device advertising only 384 kHz is rejected as having no supported
PCM frame rates. A device advertising 384 kHz together with lower rates
does not expose 384 kHz through the ALSA hardware constraints. The
selected ALSA rate also needs a reverse mapping for SET_PARAMS.

Add the missing 384 kHz entries to both conversion tables.

Fixes: 29b96bf50b ("ALSA: virtio: build PCM devices and substream hardware descriptors")
Fixes: da76e9f3e4 ("ALSA: virtio: PCM substream operators")
Cc: stable@vger.kernel.org
Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com>
Link: https://patch.msgid.link/20260515-alsa-virtio-384k-rate-v1-1-35ecb5df835c@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Cássio Gabriel
2026-05-15 10:32:25 -03:00
committed by Takashi Iwai
parent b65020d539
commit 83fbbcb793
2 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
sound/virtio/virtio_pcm.c
+2 -1
View File
@@ -77,7 +77,8 @@ static const struct virtsnd_v2a_rate g_v2a_rate_map[] = {
[VIRTIO_SND_PCM_RATE_88200] = { SNDRV_PCM_RATE_88200, 88200 },
[VIRTIO_SND_PCM_RATE_96000] = { SNDRV_PCM_RATE_96000, 96000 },
[VIRTIO_SND_PCM_RATE_176400] = { SNDRV_PCM_RATE_176400, 176400 },
[VIRTIO_SND_PCM_RATE_192000] = { SNDRV_PCM_RATE_192000, 192000 }
[VIRTIO_SND_PCM_RATE_192000] = { SNDRV_PCM_RATE_192000, 192000 },
[VIRTIO_SND_PCM_RATE_384000] = { SNDRV_PCM_RATE_384000, 384000 }
};
/**
sound/virtio/virtio_pcm_ops.c
+2 -1
View File
@@ -90,7 +90,8 @@ static const struct virtsnd_a2v_rate g_a2v_rate_map[] = {
{ 88200, VIRTIO_SND_PCM_RATE_88200 },
{ 96000, VIRTIO_SND_PCM_RATE_96000 },
{ 176400, VIRTIO_SND_PCM_RATE_176400 },
{ 192000, VIRTIO_SND_PCM_RATE_192000 }
{ 192000, VIRTIO_SND_PCM_RATE_192000 },
{ 384000, VIRTIO_SND_PCM_RATE_384000 }
};
static int virtsnd_pcm_sync_stop(struct snd_pcm_substream *substream);