diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/core/Kconfig | 10 | ||||
| -rw-r--r-- | sound/core/pcm.c | 6 | ||||
| -rw-r--r-- | sound/core/pcm_lib.c | 6 |
3 files changed, 16 insertions, 6 deletions
diff --git a/sound/core/Kconfig b/sound/core/Kconfig index 8efc1b12f3a..f3a07fb2e69 100644 --- a/sound/core/Kconfig +++ b/sound/core/Kconfig @@ -171,3 +171,13 @@ config SND_DEBUG_DETECT help Say Y here to enable extra-verbose log messages printed when detecting devices. + +config SND_PCM_XRUN_DEBUG + bool "Enable PCM ring buffer overrun/underrun debugging" + default n + depends on SND_DEBUG + help + Say Y to enable the PCM ring buffer overrun/underrun debugging. + It is usually not required, but if you have trouble with + sound clicking when system is loaded, it may help to determine + the process or driver which causes the scheduling gaps. diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 122e10a61ab..48007a54c8b 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -436,7 +436,7 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); } -#ifdef CONFIG_SND_DEBUG +#ifdef CONFIG_SND_PCM_XRUN_DEBUG static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { @@ -480,7 +480,7 @@ static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) } pstr->proc_info_entry = entry; -#ifdef CONFIG_SND_DEBUG +#ifdef CONFIG_SND_PCM_XRUN_DEBUG if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", pstr->proc_root)) != NULL) { entry->c.text.read_size = 64; @@ -501,7 +501,7 @@ static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { -#ifdef CONFIG_SND_DEBUG +#ifdef CONFIG_SND_PCM_XRUN_DEBUG if (pstr->proc_xrun_debug_entry) { snd_info_unregister(pstr->proc_xrun_debug_entry); pstr->proc_xrun_debug_entry = NULL; diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 230a940d00b..eedc6cb038b 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -130,7 +130,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram static void xrun(struct snd_pcm_substream *substream) { snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); -#ifdef CONFIG_SND_DEBUG +#ifdef CONFIG_SND_PCM_XRUN_DEBUG if (substream->pstr->xrun_debug) { snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n", substream->pcm->card->number, @@ -204,7 +204,7 @@ static inline int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *subs delta = hw_ptr_interrupt - new_hw_ptr; if (delta > 0) { if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) { -#ifdef CONFIG_SND_DEBUG +#ifdef CONFIG_SND_PCM_XRUN_DEBUG if (runtime->periods > 1 && substream->pstr->xrun_debug) { snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2); if (substream->pstr->xrun_debug > 1) @@ -249,7 +249,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) delta = old_hw_ptr - new_hw_ptr; if (delta > 0) { if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) { -#ifdef CONFIG_SND_DEBUG +#ifdef CONFIG_SND_PCM_XRUN_DEBUG if (runtime->periods > 2 && substream->pstr->xrun_debug) { snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2); if (substream->pstr->xrun_debug > 1) |