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authorJaroslav Kysela <perex@perex.cz>2009-05-28 11:21:52 +0200
committerTakashi Iwai <tiwai@suse.de>2009-05-29 11:47:36 +0200
commitc62a01ad6e746fae9c93f51ea67e0abfd8d94b58 (patch)
treea334fb7283e7bf925e61c08dc926288890d2e616 /sound/core/pcm_lib.c
parent8bea869c5e56234990e6bad92a543437115bfc18 (diff)
downloadblackbird-op-linux-c62a01ad6e746fae9c93f51ea67e0abfd8d94b58.tar.gz
blackbird-op-linux-c62a01ad6e746fae9c93f51ea67e0abfd8d94b58.zip
ALSA: PCM midlevel: introduce mask for xrun_debug() macro
For debugging purposes, it is better to separate actions. Bit-values: 1: show bad PCM ring buffer pointer 2: show also stack (to debug kernel latency issues) 4: check pointer against system jiffies Example: 5: show bad PCM ring buffer pointer and do jiffies check Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_lib.c')
-rw-r--r--sound/core/pcm_lib.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index adc2b0bd1132..25cb36710ef4 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -126,20 +126,20 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
}
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
-#define xrun_debug(substream) ((substream)->pstr->xrun_debug)
+#define xrun_debug(substream, mask) ((substream)->pstr->xrun_debug & (mask))
#else
-#define xrun_debug(substream) 0
+#define xrun_debug(substream, mask) 0
#endif
-#define dump_stack_on_xrun(substream) do { \
- if (xrun_debug(substream) > 1) \
- dump_stack(); \
+#define dump_stack_on_xrun(substream) do { \
+ if (xrun_debug(substream, 2)) \
+ dump_stack(); \
} while (0)
static void xrun(struct snd_pcm_substream *substream)
{
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
- if (xrun_debug(substream)) {
+ if (xrun_debug(substream, 1)) {
snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
substream->pcm->card->number,
substream->pcm->device,
@@ -197,7 +197,7 @@ static int snd_pcm_update_hw_ptr_post(struct snd_pcm_substream *substream,
#define hw_ptr_error(substream, fmt, args...) \
do { \
- if (xrun_debug(substream)) { \
+ if (xrun_debug(substream, 1)) { \
if (printk_ratelimit()) { \
snd_printd("PCM: " fmt, ##args); \
} \
@@ -251,7 +251,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
}
/* Do jiffies check only in xrun_debug mode */
- if (!xrun_debug(substream))
+ if (!xrun_debug(substream, 4))
goto no_jiffies_check;
/* Skip the jiffies check for hardwares with BATCH flag.
@@ -342,7 +342,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
new_hw_ptr = hw_base + pos;
}
/* Do jiffies check only in xrun_debug mode */
- if (xrun_debug(substream) &&
+ if (xrun_debug(substream, 4) &&
((delta * HZ) / runtime->rate) > jdelta + HZ/100) {
hw_ptr_error(substream,
"hw_ptr skipping! "
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