ALSA: pcsp - Fix starting the stream with HRTIMER_CB_IRQSAFE_UNLOCK
With the callback mode HRTIMER_CB_IRQSAFE_UNLOCK, the start of the
stream with zero delay doesn't work. Since IRQSAFE mode is removed,
we have to change the pcsp start-up code.
This patch splits the callback function to two parts, the triggering
of the port and the calculation of the expire time, and the update of
the ALSA PCM core. The first part is called both from the trigger-start
and the hrtimer callback while the latter is handled only in the
hrtimer callback.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/pcsp/pcsp.h b/sound/drivers/pcsp/pcsp.h
index 70533a3..cdef266 100644
--- a/sound/drivers/pcsp/pcsp.h
+++ b/sound/drivers/pcsp/pcsp.h
@@ -62,6 +62,8 @@
unsigned short port, irq, dma;
spinlock_t substream_lock;
struct snd_pcm_substream *playback_substream;
+ unsigned int fmt_size;
+ unsigned int is_signed;
size_t playback_ptr;
size_t period_ptr;
atomic_t timer_active;