Instead of managing input-jack stuff separately, call all stuff inside
the kctl-jack creation, deletion and report.  The caller no longer needs
to care about input-jack.

The better integration between input-jack and kctl-jack should be done
in the upper layer in near future, but for now, it's implemented locally
for more tests.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The function now gives more unique names for the output pins by adding
some prefix and suffix for the location and the channels.  Otherwise, it
can pass the index number.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This is needed newly since 3.2...
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Otherwise the jack kctls will report invalid values until the jack
is re-plugged.
Reported-by: NDavid Henningsson <david.henningsson@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The type field was lost during the transition.  Restored.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

At probing time, the elements that aren't assigned to kctl or jack may
be called.  Need proper NULL-checks.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

These two functions are being used by the codec-idt and codec-hdmi
modules, so they need to be exported properly.
Signed-off-by: NDavid Henningsson <david.henningsson@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

We can use the very same table in hda_jack.c for managing the list for
input-jack elements, too.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Now move the helper function for creating and reporting the jack-detection
to the common place.  The driver that needs this functionality should
select CONFIG_SND_KCTL_JACK kconfig.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Manage the tags assigned for unsolicited events dynamically together
with the jack-detection routines.  Basically this is almost same as what
we've done in patch_sigmatel.c.  Assign the new tag number for each new
unsol event, associate with the given NID and the action type, etc.

With this change, now all pins looked over in snd_hda_jack_add_kctls()
are actually enabled for detection now even if the pins aren't used for
jack-retasking by the driver.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Create kcontrols for pin jack-detections, which work similarly like
jack-input layer.  Each control will notify when the jack is plugged or
unplugged, and also user can read the value at any time via the normal
control API.

The control elements are created with iface=CARD, so that they won't
appear in the mixer apps.

So far, only the pins that enabled the jack-detection are registered.
For covering all pins, the transition of the common unsol-tag handling
would be needed.  Stay tuned.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Introduce a table containing the pins and their jack-detection states
for avoiding the unnecessary verbs to check the pin status at each time.

When the unsol event is enabled via snd_hda_jack_detect_enable(), it
automatically adds the given NID to the table.  Then the driver supposes
that the codec driver will set the dirty flag appropariately when an
unsolicited event is invoked for that pin.

The behavior for reading other pins that aren't registered in the table
doesn't change.  Only the pins assigned to the table are cached, so far.

In near futre, this table can be extended to use the central place for
the unsolicited events of all pins, etc, and eventually include the
jack-detect kcontrols that replace the current input-jack stuff.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>