diff options
| author | Takashi Iwai <tiwai@suse.de> | 2023-03-23 07:52:35 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-03-24 14:52:58 +0100 |
| commit | 0146878cf299174ec39cdd2340c19a528794d881 (patch) | |
| tree | 89192b18b46c05fa9fa5b0075cfa8bc8c4f41b17 /include | |
| parent | a7a0dcdff41700d4dfc347a6d7786d8e695994e5 (diff) | |
| download | linux-rpi-0146878cf299174ec39cdd2340c19a528794d881.tar.gz linux-rpi-0146878cf299174ec39cdd2340c19a528794d881.tar.bz2 linux-rpi-0146878cf299174ec39cdd2340c19a528794d881.zip | |
ALSA: pcm: Improved XRUN handling for indirect PCM helpers
As PCM ack callback may handle the XRUN situation gracefully now,
change the indirect PCM helpers to give a proper error (-EPIPE).
Also, change the pointer callback helpers to deal with the XRUN error
properly, too.
This requires the PCM core change by the commit 8c721c53dda5
("ALSA: usb-audio: Fix recursive locking at XRUN during syncing").
Link: https://lore.kernel.org/r/20230323065237.5062-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/pcm-indirect.h | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/include/sound/pcm-indirect.h b/include/sound/pcm-indirect.h index 04127686e8d0..98e06ea73b2b 100644 --- a/include/sound/pcm-indirect.h +++ b/include/sound/pcm-indirect.h @@ -44,7 +44,7 @@ snd_pcm_indirect_playback_transfer(struct snd_pcm_substream *substream, if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2)) diff += runtime->boundary; if (diff < 0) - return -EINVAL; + return -EPIPE; rec->sw_ready += (int)frames_to_bytes(runtime, diff); rec->appl_ptr = appl_ptr; } @@ -83,6 +83,8 @@ snd_pcm_indirect_playback_pointer(struct snd_pcm_substream *substream, struct snd_pcm_indirect *rec, unsigned int ptr) { int bytes = ptr - rec->hw_io; + int err; + if (bytes < 0) bytes += rec->hw_buffer_size; rec->hw_io = ptr; @@ -90,8 +92,11 @@ snd_pcm_indirect_playback_pointer(struct snd_pcm_substream *substream, rec->sw_io += bytes; if (rec->sw_io >= rec->sw_buffer_size) rec->sw_io -= rec->sw_buffer_size; - if (substream->ops->ack) - substream->ops->ack(substream); + if (substream->ops->ack) { + err = substream->ops->ack(substream); + if (err == -EPIPE) + return SNDRV_PCM_POS_XRUN; + } return bytes_to_frames(substream->runtime, rec->sw_io); } @@ -112,7 +117,7 @@ snd_pcm_indirect_capture_transfer(struct snd_pcm_substream *substream, if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2)) diff += runtime->boundary; if (diff < 0) - return -EINVAL; + return -EPIPE; rec->sw_ready -= frames_to_bytes(runtime, diff); rec->appl_ptr = appl_ptr; } @@ -152,6 +157,8 @@ snd_pcm_indirect_capture_pointer(struct snd_pcm_substream *substream, { int qsize; int bytes = ptr - rec->hw_io; + int err; + if (bytes < 0) bytes += rec->hw_buffer_size; rec->hw_io = ptr; @@ -162,8 +169,11 @@ snd_pcm_indirect_capture_pointer(struct snd_pcm_substream *substream, rec->sw_io += bytes; if (rec->sw_io >= rec->sw_buffer_size) rec->sw_io -= rec->sw_buffer_size; - if (substream->ops->ack) - substream->ops->ack(substream); + if (substream->ops->ack) { + err = substream->ops->ack(substream); + if (err == -EPIPE) + return SNDRV_PCM_POS_XRUN; + } return bytes_to_frames(substream->runtime, rec->sw_io); } |