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ALSA: hda: fix trigger_tstamp_latched

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When the trigger_tstamp_latched flag is set, the PCM core code assumes that
the low-level driver handles the trigger timestamping itself. Ensure that
runtime->trigger_tstamp is always updated.

Buglink: https://github.com/alsa-project/alsa-lib/issues/387
Reported-by: Zeno Endemann <zeno.endemann@mailbox.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://patch.msgid.link/20241002081306.1788405-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2024-10-02 10:13:06 +02:00 committed by Takashi Iwai
parent d75dba4974
commit df5215618f
3 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/sound/hdaudio.h
View File

@ -590,7 +590,7 @@ void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
unsigned int streams);
void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
unsigned int streams);
unsigned int streams, bool start);
int snd_hdac_get_stream_stripe_ctl(struct hdac_bus *bus,
struct snd_pcm_substream *substream);

6
sound/hda/hdac_stream.c
View File

@ -664,7 +664,7 @@ static void azx_timecounter_init(struct hdac_stream *azx_dev,
* updated accordingly, too.
*/
void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
unsigned int streams)
unsigned int streams, bool start)
{
struct hdac_bus *bus = azx_dev->bus;
struct snd_pcm_runtime *runtime = azx_dev->substream->runtime;
@ -672,6 +672,9 @@ void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
bool inited = false;
u64 cycle_last = 0;
if (!start)
goto skip;
list_for_each_entry(s, &bus->stream_list, list) {
if ((streams & (1 << s->index))) {
azx_timecounter_init(s, inited, cycle_last);
@ -682,6 +685,7 @@ void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
}
}
skip:
snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
runtime->trigger_tstamp_latched = true;
}

3
sound/pci/hda/hda_controller.c
View File

@ -275,8 +275,7 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
spin_lock(&bus->reg_lock);
/* reset SYNC bits */
snd_hdac_stream_sync_trigger(hstr, false, sbits, sync_reg);
if (start)
snd_hdac_stream_timecounter_init(hstr, sbits);
snd_hdac_stream_timecounter_init(hstr, sbits, start);
spin_unlock(&bus->reg_lock);
return 0;
}