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>
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index adc2b0b..25cb367 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -126,20 +126,20 @@
}
#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 @@
#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 @@
}
/* 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 @@
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! "