#include <linux/slab.h>
#include <linux/time.h>
+#include <linux/math64.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
}
#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);
}
}
{
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 */
-#ifdef CONFIG_SND_DEBUG
if (pos >= runtime->buffer_size) {
- snd_printk(KERN_ERR "BUG: stream = %i, pos = 0x%lx, buffer size = 0x%lx, period size = 0x%lx\n", substream->stream, pos, runtime->buffer_size, runtime->period_size);
+ if (printk_ratelimit()) {
+ 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",
+ name, pos, runtime->buffer_size,
+ runtime->period_size);
+ }
+ pos = 0;
}
-#endif
pos -= pos % runtime->min_align;
return pos;
}
#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); \
} \
{
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);
new_hw_ptr = hw_base + pos;
hw_ptr_interrupt = runtime->hw_ptr_interrupt + runtime->period_size;
delta = new_hw_ptr - hw_ptr_interrupt;
- if (hw_ptr_interrupt == runtime->boundary)
- hw_ptr_interrupt = 0;
+ if (hw_ptr_interrupt >= runtime->boundary) {
+ hw_ptr_interrupt -= runtime->boundary;
+ if (hw_base < runtime->boundary / 2)
+ /* hw_base was already lapped; recalc delta */
+ delta = new_hw_ptr - hw_ptr_interrupt;
+ }
if (delta < 0) {
delta += runtime->buffer_size;
if (delta < 0) {
(long)hw_ptr_interrupt);
/* 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;
} else {
hw_base += runtime->buffer_size;
- if (hw_base == runtime->boundary)
+ if (hw_base >= runtime->boundary)
hw_base = 0;
new_hw_ptr = hw_base + pos;
}
}
- if (delta > runtime->period_size) {
+
+ /* 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.
+ */
+ 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 /
+ (((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;
+ }
+ no_jiffies_check:
+ if (delta > runtime->period_size + runtime->period_size / 2) {
hw_ptr_error(substream,
"Lost interrupts? "
"(stream=%i, delta=%ld, intr_ptr=%ld)\n",
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_interrupt = hw_ptr_interrupt;
+ 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);
}
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);
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;
- if (hw_base == runtime->boundary)
+ if (hw_base >= runtime->boundary)
hw_base = 0;
new_hw_ptr = hw_base + pos;
}
- if (delta > runtime->period_size && runtime->periods > 1) {
+ /* 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! "
- "(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;
}
+ 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);
}
*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;
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
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;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff