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alistair23-linux/sound/core
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Koro Chen 13a988396c ALSA: pcm: Modify double acknowledged interrupts check condition 
Currently in snd_pcm_update_hw_ptr0 during interrupt,
we consider there were double acknowledged interrupts when:
1. HW reported pointer is smaller than expected, and
2. Time from last update time (hdelta) is over half a buffer time.

However, when HW reported pointer is only a few bytes smaller than
expected, and when hdelta is just a little larger than half a buffer time
(e.g. ping-pong buffer), it wrongly treats this IRQ as double acknowledged.

The condition #2 uses jiffies, but jiffies is not high resolution
since it is integer. We should consider jiffies inaccuracy.

Signed-off-by: Koro Chen <koro.chen@mediatek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-05-19 09:32:29 +02:00
..
oss ALSA: core: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:42:14 +01:00
seq ALSA: seq: fill client ID in return value of pool operation 2015-04-11 09:11:19 +02:00
compress_offload.c ALSA: Simplify snd_device_register() variants 2015-02-02 17:01:26 +01:00
control.c ALSA: ctl: fix to handle several elements added by one operation for userspace element 2015-04-13 10:31:49 +02:00
control_compat.c ALSA: control: Use standard printk helpers 2014-02-14 08:14:14 +01:00
ctljack.c ALSA: hda - Add missing inclusion of linux/export.h 2011-11-16 14:28:33 +01:00
device.c Merge branch 'topic/hda-unbind' into for-next 2015-03-16 14:48:20 +01:00
hrtimer.c ALSA: timer: Use standard printk helpers 2014-02-14 08:14:17 +01:00
hwdep.c ALSA: core: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:42:14 +01:00
hwdep_compat.c [PATCH] hwdep_compat missed __user annotations 2006-10-10 15:37:21 -07:00
info.c ALSA: core: fix buffer overflow in snd_info_get_line() 2014-08-22 07:21:05 +02:00
info_oss.c ALSA: remove the main version information 2012-09-04 11:38:32 +02:00
init.c ALSA: core: Re-add snd_device_disconnect() 2015-03-03 11:26:28 +01:00
isadma.c ALSA: core: Use standard printk helpers 2014-02-14 08:14:15 +01:00
jack.c ALSA: jack: Unregister input device at disconnection 2013-11-14 17:22:45 +01:00
Kconfig ALSA: core: allow SND_DMAENGINE_PCM use from modules 2013-08-15 18:28:42 +01:00
Makefile ALSA: pcm: Replace PCM hwptr tracking with tracepoints 2014-11-04 14:09:14 +01:00
memalloc.c ALSA: core: Use standard printk helpers 2014-02-14 08:14:15 +01:00
memory.c ALSA: Include linux/uaccess.h and linux/bitopts.h instead of asm/* 2015-01-28 17:25:07 +01:00
misc.c ALSA: Allow pass NULL dev for snd_pci_quirk_lookup() 2014-10-08 12:08:38 +02:00
pcm.c ALSA: core: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:42:14 +01:00
pcm_compat.c ALSA: core: pass audio tstamp config from userspace in compat mode 2015-02-20 17:30:05 +01:00
pcm_dmaengine.c ALSA: Fix spelling typo in Documentation/DocBook/alsa-driver-api.xml 2015-03-04 12:12:59 +01:00
pcm_lib.c ALSA: pcm: Modify double acknowledged interrupts check condition 2015-05-19 09:32:29 +02:00
pcm_memory.c ALSA: Include linux/io.h instead of asm/io.h 2015-01-28 16:49:33 +01:00
pcm_misc.c ALSA: pcm: Add big-endian DSD sample formats and fix XMOS DSD sample format 2014-11-21 15:13:28 +01:00
pcm_native.c sound updates for 4.1-rc1 2015-04-15 15:41:41 -07:00
pcm_timer.c ALSA: pcm: Use standard printk helpers 2014-02-14 08:14:15 +01:00
pcm_trace.h ALSA: pcm: Replace PCM hwptr tracking with tracepoints 2014-11-04 14:09:14 +01:00
rawmidi.c ALSA: core: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:42:14 +01:00
rawmidi_compat.c [ALSA] Remove xxx_t typedefs: Raw MIDI 2006-01-03 12:17:35 +01:00
rtctimer.c ALSA: timer: Use standard printk helpers 2014-02-14 08:14:17 +01:00
sgbuf.c ALSA: core: Deletion of unnecessary checks before two function calls 2014-11-21 20:06:57 +01:00
sound.c ALSA: Consolidate snd_find_free_minor() 2015-02-17 07:39:37 +01:00
sound_oss.c ALSA: Use standard device refcount for card accounting 2014-02-14 08:14:13 +01:00
timer.c ALSA: core: Drop superfluous error/debug messages after malloc failures 2015-03-10 15:42:14 +01:00
timer_compat.c ALSA: Kill snd_assert() in sound/core/* 2008-08-13 11:46:35 +02:00
vmaster.c ALSA: core: Use standard printk helpers 2014-02-14 08:14:15 +01:00