Commit Graph

5 Commits

Author SHA1 Message Date
Takashi Iwai 8dca419721 ALSA: ctxfi - Fix deadlock with xfi-timer
The PCM x-fi native update routine can cause deadlocks when the
trigger(START) is called while the stream is running.

This patch fixes the deadlock by just postponing the pcm period update
to the next possible wake-up.  Also it adds the flip of ti->running
flag (just to be sure as now).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-15 14:52:55 +02:00
Takashi Iwai 04145f2bfb ALSA: ctxfi - Add use_system_timer module option
Added use_system_timer module option to force to use the system timer
instead of emu20k1 timer irq for debugging.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-08 21:32:26 +02:00
Takashi Iwai 54de6bc8b2 ALSA: ctxfi - Optimize the native timer handling using wc counter
Optimize the timer update routine to look up wall clock once instead of
checking the position of each stream at each timer update.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-08 12:38:54 +02:00
Takashi Iwai 28cd4aa43d ALSA: ctxfi - Add missing inclusion of linux/math64.h
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-05 18:07:12 +02:00
Takashi Iwai b7bbf87608 ALSA: ctxfi - Use native timer interrupt on emu20k1
emu20k1 has a native timer interrupt based on the audio clock, which
is more accurate than the system timer (from the synchronization POV).
This patch adds the code to handle this with multiple streams.

The system timer is still used on emu20k2, and can be used also for
emu20k1 easily by changing USE_SYSTEM_TIMER to 1 in cttimer.c.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-06-05 16:44:13 +02:00