linux.git/include/sound/core.h, branch v2.6.20

[PATCH] ALSA: Fix sysfs breakage

2007-01-29T22:32:53+00:00

The recent change for a new sysfs tree with card* object breaks the
/sys/class/sound tree if CONFIG_SYSFS_DEPRECATED is enabled.
The device in each entry doesn't point the correct device object:

  /sys/class/sound
  ...
  |-- pcmC0D0c
  |   |-- dev
  |   |-- device -> ../../../class/sound/card0
  |   |-- pcm_class
  |   |-- power
  |   |   `-- wakeup
  |   |-- subsystem -> ../../../class/sound
  |   `-- uevent

Also, this change breaks some drivers (like sound/arm/*) referring
card->dev directly to obtain the device object for memory handling.

This patch reverts the semantics of card->dev to the former version,
which points to a real device object.  The card* object is stored in a
new card->card_dev field, instead.  The device parent is chosen either
card->dev or card->card_dev according to CONFIG_SYSFS_DEPRECATED to
keep the tree compatibility.
Also, card* isn't created if CONFIG_SYSFS_DEPRECATED is enabled.  The
reason of card* object is a root of all beloing devices, and it makes
little sense if each sound device points to the real device object
directly.

Signed-off-by: Takashi Iwai 
Acked-by: Monty Montgomery 
Signed-off-by: Greg Kroah-Hartman

Driver core: convert sound core to use struct device

2006-12-01T22:52:01+00:00

Converts from using struct "class_device" to "struct device" making
everything show up properly in /sys/devices/ with symlinks from the
/sys/class directory.

It also makes the struct sound_card to show up as a "real" device
where all the different sound class devices are placed as childs
and different card attribute files can hang off of. /sys/class/sound is
still a flat directory, but the symlink targets of all devices belonging
to the same card, point the the /sys/devices tree below the new card
device object.

Thanks to Kay for the updates to this patch.

Signed-off-by: Kay Sievers 
Acked-by: Jaroslav Kysela 
Signed-off-by: Greg Kroah-Hartman

[ALSA] Handle file operations during snd_card disconnects using static file->f_op

2006-10-06T18:23:04+00:00

Alsa used to kmalloc one file->f_op per file per disconnecting snd_card.
This led to oopses sometimes when file->f_op was freed before __fput()
finished.
Patch adds a virtual device for disconnect: VDD.
VDD consists of:
	LIST_HEAD(shutdown_files)
	    protected by DEFINE_SPINLOCK(shutdown_mutex)
	static struct file_operations snd_shutdown_f_ops
	    and functions assigned to it
	Additions to struct snd_monitor_file
	    to specify if instance is hidden by VDD or not.
A VDD's instance is
	created in snd_card_disconnect() under the card->files_lock.
	cleaned up in snd_card_file_remove() under the card->files_lock.

Signed-off-by: Karsten Wiese 
Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela

[ALSA] Add pcm_class attribute to PCM sysfs entry

2006-09-23T08:46:32+00:00

This patch adds a new attribute, pcm_class, to each PCM sysfs entry.
It's useful to detect what kind of PCM stream is, for example, HAL
can check whether it's a modem or not.

Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela

[ALSA] Deprecate snd_card_free_in_thread()

2006-09-23T08:37:03+00:00

Deprecated snd_card_free_in_thread(), replaced with
snd_card_free_when_closed().

Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela

[ALSA] Unregister device files at disconnection

2006-09-23T08:36:58+00:00

Orignally proposed by Sam Revitch .
Unregister device files at disconnection to avoid the futher accesses.
Also, the dev_unregister callback is removed and replaced with the
combination of disconnect + free.
A new function snd_card_free_when_closed() is introduced, which is
used in USB disconnect callback.

Signed-off-by: Takashi Iwai 
Signed-off-by: Jaroslav Kysela

[ALSA] remove unused snd_minor.name field

2006-07-12T18:07:55+00:00

Drop the snd_minor structure's name field that was just a helper for
devfs device deregistration.

Signed-off-by: Clemens Ladisch 
Signed-off-by: Jaroslav Kysela

[ALSA] Fix rwlock around snd_iprintf() in sound core

2006-06-22T19:33:37+00:00

Fixed rwlock around snd_iprintf() in sound core part.
Replaced with mutex.
Also, make mutex and flags static variables with addition of
snd_card_locked() function (just for sound.c).

Signed-off-by: Takashi Iwai

Update dummy snd_power_wait() function for new calling convention

2006-04-02T21:37:36+00:00

Apparently nobody had tried to compile the ALSA CVS tree without power
management enabled.

Signed-off-by: Linus Torvalds

[ALSA] Cleanup unused argument for snd_power_wait()

2006-03-31T15:58:56+00:00

Removed the unused file argument of snd_power_wait().

Signed-off-by: Takashi Iwai