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-rw-r--r--include/sound/pcm.h3
-rw-r--r--sound/core/pcm_lib.c47
2 files changed, 41 insertions, 9 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 8904b1900d7..c1729689161 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -268,7 +268,8 @@ struct snd_pcm_runtime {
int overrange;
snd_pcm_uframes_t avail_max;
snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
- snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
+ snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
+ unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
/* -- HW params -- */
snd_pcm_access_t access; /* access mode */
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index fbb2e391591..63d088f2265 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -209,9 +209,11 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_uframes_t pos;
- snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt, hw_base;
- snd_pcm_sframes_t delta;
+ snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_ptr_interrupt, hw_base;
+ snd_pcm_sframes_t hdelta, delta;
+ unsigned long jdelta;
+ old_hw_ptr = runtime->status->hw_ptr;
pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
if (pos == SNDRV_PCM_POS_XRUN) {
xrun(substream);
@@ -247,7 +249,30 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
new_hw_ptr = hw_base + pos;
}
}
- if (delta > runtime->period_size) {
+ hdelta = new_hw_ptr - old_hw_ptr;
+ jdelta = jiffies - runtime->hw_ptr_jiffies;
+ if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) {
+ delta = jdelta /
+ (((runtime->period_size * HZ) / runtime->rate)
+ + HZ/100);
+ hw_ptr_error(substream,
+ "hw_ptr skipping! [Q] "
+ "(pos=%ld, delta=%ld, period=%ld, "
+ "jdelta=%lu/%lu/%lu)\n",
+ (long)pos, (long)hdelta,
+ (long)runtime->period_size, jdelta,
+ ((hdelta * HZ) / runtime->rate), delta);
+ hw_ptr_interrupt = runtime->hw_ptr_interrupt +
+ runtime->period_size * delta;
+ if (hw_ptr_interrupt >= runtime->boundary)
+ hw_ptr_interrupt -= runtime->boundary;
+ /* rebase to interrupt position */
+ hw_base = new_hw_ptr = hw_ptr_interrupt;
+ /* align hw_base to buffer_size */
+ hw_base -= hw_base % runtime->buffer_size;
+ delta = 0;
+ }
+ if (delta > runtime->period_size + runtime->period_size / 2) {
hw_ptr_error(substream,
"Lost interrupts? "
"(stream=%i, delta=%ld, intr_ptr=%ld)\n",
@@ -263,6 +288,7 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
runtime->hw_ptr_base = hw_base;
runtime->status->hw_ptr = new_hw_ptr;
+ runtime->hw_ptr_jiffies = jiffies;
runtime->hw_ptr_interrupt = hw_ptr_interrupt;
return snd_pcm_update_hw_ptr_post(substream, runtime);
@@ -275,6 +301,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
snd_pcm_uframes_t pos;
snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base;
snd_pcm_sframes_t delta;
+ unsigned long jdelta;
old_hw_ptr = runtime->status->hw_ptr;
pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
@@ -286,14 +313,15 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
new_hw_ptr = hw_base + pos;
delta = new_hw_ptr - old_hw_ptr;
+ jdelta = jiffies - runtime->hw_ptr_jiffies;
if (delta < 0) {
delta += runtime->buffer_size;
if (delta < 0) {
hw_ptr_error(substream,
"Unexpected hw_pointer value [2] "
- "(stream=%i, pos=%ld, old_ptr=%ld)\n",
+ "(stream=%i, pos=%ld, old_ptr=%ld, jdelta=%li)\n",
substream->stream, (long)pos,
- (long)old_hw_ptr);
+ (long)old_hw_ptr, jdelta);
return 0;
}
hw_base += runtime->buffer_size;
@@ -301,12 +329,13 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
hw_base = 0;
new_hw_ptr = hw_base + pos;
}
- if (delta > runtime->period_size && runtime->periods > 1) {
+ if (((delta * HZ) / runtime->rate) > jdelta + HZ/100) {
hw_ptr_error(substream,
"hw_ptr skipping! "
- "(pos=%ld, delta=%ld, period=%ld)\n",
+ "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu)\n",
(long)pos, (long)delta,
- (long)runtime->period_size);
+ (long)runtime->period_size, jdelta,
+ ((delta * HZ) / runtime->rate));
return 0;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
@@ -315,6 +344,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
runtime->hw_ptr_base = hw_base;
runtime->status->hw_ptr = new_hw_ptr;
+ runtime->hw_ptr_jiffies = jiffies;
return snd_pcm_update_hw_ptr_post(substream, runtime);
}
@@ -1441,6 +1471,7 @@ static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream,
runtime->status->hw_ptr %= runtime->buffer_size;
else
runtime->status->hw_ptr = 0;
+ runtime->hw_ptr_jiffies = jiffies;
snd_pcm_stream_unlock_irqrestore(substream, flags);
return 0;
}