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Diffstat (limited to 'sound/core/pcm_lib.c')
-rw-r--r--sound/core/pcm_lib.c94
1 files changed, 76 insertions, 18 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index a2a792c18c4..333e4dd2945 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -22,6 +22,7 @@
#include <linux/slab.h>
#include <linux/time.h>
+#include <linux/math64.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
@@ -126,24 +127,37 @@ 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 pcm_debug_name(struct snd_pcm_substream *substream,
+ char *name, size_t len)
+{
+ snprintf(name, len, "pcmC%dD%d%c:%d",
+ substream->pcm->card->number,
+ substream->pcm->device,
+ substream->stream ? 'c' : 'p',
+ substream->number);
+}
+
static void xrun(struct snd_pcm_substream *substream)
{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
+ snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
- if (xrun_debug(substream)) {
- snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
- substream->pcm->card->number,
- substream->pcm->device,
- substream->stream ? 'c' : 'p');
+ if (xrun_debug(substream, 1)) {
+ char name[16];
+ pcm_debug_name(substream, name, sizeof(name));
+ snd_printd(KERN_DEBUG "XRUN: %s\n", name);
dump_stack_on_xrun(substream);
}
}
@@ -154,16 +168,16 @@ snd_pcm_update_hw_ptr_pos(struct snd_pcm_substream *substream,
{
snd_pcm_uframes_t pos;
- if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
- snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
pos = substream->ops->pointer(substream);
if (pos == SNDRV_PCM_POS_XRUN)
return pos; /* XRUN */
if (pos >= runtime->buffer_size) {
if (printk_ratelimit()) {
- snd_printd(KERN_ERR "BUG: stream = %i, pos = 0x%lx, "
+ char name[16];
+ pcm_debug_name(substream, name, sizeof(name));
+ snd_printd(KERN_ERR "BUG: %s, pos = 0x%lx, "
"buffer size = 0x%lx, period size = 0x%lx\n",
- substream->stream, pos, runtime->buffer_size,
+ name, pos, runtime->buffer_size,
runtime->period_size);
}
pos = 0;
@@ -197,7 +211,7 @@ 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); \
} \
@@ -249,6 +263,11 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
new_hw_ptr = hw_base + pos;
}
}
+
+ /* Do jiffies check only in xrun_debug mode */
+ if (!xrun_debug(substream, 4))
+ goto no_jiffies_check;
+
/* Skip the jiffies check for hardwares with BATCH flag.
* Such hardware usually just increases the position at each IRQ,
* thus it can't give any strange position.
@@ -256,6 +275,9 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
if (runtime->hw.info & SNDRV_PCM_INFO_BATCH)
goto no_jiffies_check;
hdelta = new_hw_ptr - old_hw_ptr;
+ if (hdelta < runtime->delay)
+ goto no_jiffies_check;
+ hdelta -= runtime->delay;
jdelta = jiffies - runtime->hw_ptr_jiffies;
if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) {
delta = jdelta /
@@ -289,14 +311,20 @@ static int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *substream)
hw_ptr_interrupt =
new_hw_ptr - new_hw_ptr % runtime->period_size;
}
+ runtime->hw_ptr_interrupt = hw_ptr_interrupt;
+
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
runtime->silence_size > 0)
snd_pcm_playback_silence(substream, new_hw_ptr);
+ if (runtime->status->hw_ptr == new_hw_ptr)
+ return 0;
+
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;
+ if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
+ snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
return snd_pcm_update_hw_ptr_post(substream, runtime);
}
@@ -336,6 +364,12 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
hw_base = 0;
new_hw_ptr = hw_base + pos;
}
+ /* Do jiffies check only in xrun_debug mode */
+ if (!xrun_debug(substream, 4))
+ goto no_jiffies_check;
+ if (delta < runtime->delay)
+ goto no_jiffies_check;
+ delta -= runtime->delay;
if (((delta * HZ) / runtime->rate) > jdelta + HZ/100) {
hw_ptr_error(substream,
"hw_ptr skipping! "
@@ -345,13 +379,19 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
((delta * HZ) / runtime->rate));
return 0;
}
+ no_jiffies_check:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
runtime->silence_size > 0)
snd_pcm_playback_silence(substream, new_hw_ptr);
+ if (runtime->status->hw_ptr == new_hw_ptr)
+ return 0;
+
runtime->hw_ptr_base = hw_base;
runtime->status->hw_ptr = new_hw_ptr;
runtime->hw_ptr_jiffies = jiffies;
+ if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
+ snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
return snd_pcm_update_hw_ptr_post(substream, runtime);
}
@@ -445,7 +485,7 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
*r = 0;
return UINT_MAX;
}
- div64_32(&n, c, r);
+ n = div_u64_rem(n, c, r);
if (n >= UINT_MAX) {
*r = 0;
return UINT_MAX;
@@ -1478,7 +1518,6 @@ 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;
}
@@ -1518,6 +1557,23 @@ static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream,
return 0;
}
+static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream,
+ void *arg)
+{
+ struct snd_pcm_hw_params *params = arg;
+ snd_pcm_format_t format;
+ int channels, width;
+
+ params->fifo_size = substream->runtime->hw.fifo_size;
+ if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) {
+ format = params_format(params);
+ channels = params_channels(params);
+ width = snd_pcm_format_physical_width(format);
+ params->fifo_size /= width * channels;
+ }
+ return 0;
+}
+
/**
* snd_pcm_lib_ioctl - a generic PCM ioctl callback
* @substream: the pcm substream instance
@@ -1539,6 +1595,8 @@ int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
return snd_pcm_lib_ioctl_reset(substream, arg);
case SNDRV_PCM_IOCTL1_CHANNEL_INFO:
return snd_pcm_lib_ioctl_channel_info(substream, arg);
+ case SNDRV_PCM_IOCTL1_FIFO_SIZE:
+ return snd_pcm_lib_ioctl_fifo_size(substream, arg);
}
return -ENXIO;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-23 21:02:59 +0000