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authorJie Yang <yang.jie@intel.com>2015-10-16 17:57:46 +0800
committerTakashi Iwai <tiwai@suse.de>2015-10-16 14:31:38 +0200
commit90bbaf66ee7b946952f1e82a0069639dea5fd893 (patch)
treee3850c14dde524593c99cf0487a8694601376a22 /sound/core/pcm_native.c
parentdab9981756dbc3c50c194811f176f0d658c171af (diff)
downloadlinux-90bbaf66ee7b946952f1e82a0069639dea5fd893.tar.bz2
ALSA: timer: add config item to export PCM timer disabling for expert
PCM timer is not always used. For embedded device, we need an interface to disable it when it is not needed, to shrink the kernel size and memory footprint, here add CONFIG_SND_PCM_TIMER for it. When both CONFIG_SND_PCM_TIMER and CONFIG_SND_TIMER is unselected, about 25KB saving bonus we can get. Please be noted that when disabled, those stubs who using pcm timer (e.g. dmix, dsnoop & co) may work incorrectlly. Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_native.c')
-rw-r--r--sound/core/pcm_native.c36
1 files changed, 16 insertions, 20 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 139887011ba2..a8b27cdc2844 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -486,6 +486,16 @@ static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
snd_pcm_stream_unlock_irq(substream);
}
+static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream,
+ int event)
+{
+#ifdef CONFIG_SND_PCM_TIMER
+ if (substream->timer)
+ snd_timer_notify(substream->timer, event,
+ &substream->runtime->trigger_tstamp);
+#endif
+}
+
static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
@@ -1043,9 +1053,7 @@ static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
runtime->silence_size > 0)
snd_pcm_playback_silence(substream, ULONG_MAX);
- if (substream->timer)
- snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
- &runtime->trigger_tstamp);
+ snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
}
static struct action_ops snd_pcm_action_start = {
@@ -1093,9 +1101,7 @@ static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
if (runtime->status->state != state) {
snd_pcm_trigger_tstamp(substream);
runtime->status->state = state;
- if (substream->timer)
- snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
- &runtime->trigger_tstamp);
+ snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
}
wake_up(&runtime->sleep);
wake_up(&runtime->tsleep);
@@ -1209,18 +1215,12 @@ static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
snd_pcm_trigger_tstamp(substream);
if (push) {
runtime->status->state = SNDRV_PCM_STATE_PAUSED;
- if (substream->timer)
- snd_timer_notify(substream->timer,
- SNDRV_TIMER_EVENT_MPAUSE,
- &runtime->trigger_tstamp);
+ snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE);
wake_up(&runtime->sleep);
wake_up(&runtime->tsleep);
} else {
runtime->status->state = SNDRV_PCM_STATE_RUNNING;
- if (substream->timer)
- snd_timer_notify(substream->timer,
- SNDRV_TIMER_EVENT_MCONTINUE,
- &runtime->trigger_tstamp);
+ snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE);
}
}
@@ -1268,9 +1268,7 @@ static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
snd_pcm_trigger_tstamp(substream);
runtime->status->suspended_state = runtime->status->state;
runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
- if (substream->timer)
- snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
- &runtime->trigger_tstamp);
+ snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND);
wake_up(&runtime->sleep);
wake_up(&runtime->tsleep);
}
@@ -1374,9 +1372,7 @@ static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_trigger_tstamp(substream);
runtime->status->state = runtime->status->suspended_state;
- if (substream->timer)
- snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
- &runtime->trigger_tstamp);
+ snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
}
static struct action_ops snd_pcm_action_resume = {