diff options
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_lib.c | 22 | ||||
| -rw-r--r-- | sound/core/pcm_native.c | 3 | ||||
| -rw-r--r-- | sound/core/seq/seq.c | 4 | ||||
| -rw-r--r-- | sound/core/sound.c | 18 | ||||
| -rw-r--r-- | sound/core/timer.c | 7 |
5 files changed, 47 insertions, 7 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index b75db8e9cc0f..fd18c3c6484f 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -373,6 +373,27 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, (unsigned long)new_hw_ptr, (unsigned long)runtime->hw_ptr_base); } + + if (runtime->no_period_wakeup) { + /* + * Without regular period interrupts, we have to check + * the elapsed time to detect xruns. + */ + jdelta = jiffies - runtime->hw_ptr_jiffies; + if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) + goto no_delta_check; + hdelta = jdelta - delta * HZ / runtime->rate; + while (hdelta > runtime->hw_ptr_buffer_jiffies / 2 + 1) { + delta += runtime->buffer_size; + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) + hw_base = 0; + new_hw_ptr = hw_base + pos; + hdelta -= runtime->hw_ptr_buffer_jiffies; + } + goto no_delta_check; + } + /* something must be really wrong */ if (delta >= runtime->buffer_size + runtime->period_size) { hw_ptr_error(substream, @@ -442,6 +463,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, (long)old_hw_ptr); } + no_delta_check: if (runtime->status->hw_ptr == new_hw_ptr) return 0; diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index e82c1f97d99e..0db714e87a80 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -422,6 +422,9 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream, runtime->info = params->info; runtime->rate_num = params->rate_num; runtime->rate_den = params->rate_den; + runtime->no_period_wakeup = + (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && + (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); bits = snd_pcm_format_physical_width(runtime->format); runtime->sample_bits = bits; diff --git a/sound/core/seq/seq.c b/sound/core/seq/seq.c index bf09a5ad1865..119fddb6fc99 100644 --- a/sound/core/seq/seq.c +++ b/sound/core/seq/seq.c @@ -32,6 +32,7 @@ #include "seq_timer.h" #include "seq_system.h" #include "seq_info.h" +#include <sound/minors.h> #include <sound/seq_device.h> #if defined(CONFIG_SND_SEQ_DUMMY_MODULE) @@ -73,6 +74,9 @@ MODULE_PARM_DESC(seq_default_timer_subdevice, "The default timer subdevice numbe module_param(seq_default_timer_resolution, int, 0644); MODULE_PARM_DESC(seq_default_timer_resolution, "The default timer resolution in Hz."); +MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_SEQUENCER); +MODULE_ALIAS("devname:snd/seq"); + /* * INIT PART */ diff --git a/sound/core/sound.c b/sound/core/sound.c index 66691fe437e6..1c7a3efe1778 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -188,14 +188,22 @@ static const struct file_operations snd_fops = }; #ifdef CONFIG_SND_DYNAMIC_MINORS -static int snd_find_free_minor(void) +static int snd_find_free_minor(int type) { int minor; + /* static minors for module auto loading */ + if (type == SNDRV_DEVICE_TYPE_SEQUENCER) + return SNDRV_MINOR_SEQUENCER; + if (type == SNDRV_DEVICE_TYPE_TIMER) + return SNDRV_MINOR_TIMER; + for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) { - /* skip minors still used statically for autoloading devices */ - if (SNDRV_MINOR_DEVICE(minor) == SNDRV_MINOR_CONTROL || - minor == SNDRV_MINOR_SEQUENCER) + /* skip static minors still used for module auto loading */ + if (SNDRV_MINOR_DEVICE(minor) == SNDRV_MINOR_CONTROL) + continue; + if (minor == SNDRV_MINOR_SEQUENCER || + minor == SNDRV_MINOR_TIMER) continue; if (!snd_minors[minor]) return minor; @@ -269,7 +277,7 @@ int snd_register_device_for_dev(int type, struct snd_card *card, int dev, preg->private_data = private_data; mutex_lock(&sound_mutex); #ifdef CONFIG_SND_DYNAMIC_MINORS - minor = snd_find_free_minor(); + minor = snd_find_free_minor(type); #else minor = snd_kernel_minor(type, card, dev); if (minor >= 0 && snd_minors[minor]) diff --git a/sound/core/timer.c b/sound/core/timer.c index 13afb60999b9..ed016329e911 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -34,8 +34,8 @@ #include <sound/initval.h> #include <linux/kmod.h> -#if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE) -#define DEFAULT_TIMER_LIMIT 3 +#if defined(CONFIG_SND_HRTIMER) || defined(CONFIG_SND_HRTIMER_MODULE) +#define DEFAULT_TIMER_LIMIT 4 #elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE) #define DEFAULT_TIMER_LIMIT 2 #else @@ -52,6 +52,9 @@ MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); module_param(timer_tstamp_monotonic, int, 0444); MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); +MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); +MODULE_ALIAS("devname:snd/timer"); + struct snd_timer_user { struct snd_timer_instance *timeri; int tread; /* enhanced read with timestamps and events */ |