Allow custom accessory identification mechanisms to make use of the MICDET
support in the device.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

If we've got jack detection support then check that the jack is still
inserted when handling a mic IRQ in order to avoid transient reports
caused by shorts during the removal process as the two interrupts race
with each other.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Allow the user to override the accessory identification code with their
own implementation if the system provides an alternative method.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Currently the WM8994 driver allows the WM8958 microphone detection code to
be replaced in its entirety, providing a default implementation. This
doesn't actually reflect the needs of users well. They generally wish to
replace only the accessory identification parts of the algorithm (eg,
using an external GPIO to provide the equivalent of the JACKDET support in
the WM1811A).

In preparation for supporting these users better refactor the existing code
so that we have separate identification and button detection callbacks,
selecting between them rather than using the mic_detecting flag in the
existing callback. This also simplifies the code by introducing a more
explicit state machine for the detecting and button states.

In anticipation of future refactoring the callback is left in the signature
for wm8958_mic_detect(), it will be removed at a later stage.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Jack detection will not do anything to help us detect a microphone when
there is a fault in the cable and the debounce we have is enough to avoid
getting an intermediate result so halt microphone detection when we detect
that one is not present.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

This is better style and facilitates implementation of device tree support
for the driver.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

When lowering SYSCLK to 50kHz for accessory detection also lower the
AIFnCLK divisor to normalise the clocking configuration within the
device. This will not disrupt audio as we cannot support active audio
with such a low SYSCLK.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Correct spelling typo in debug messages within drivers/sound
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Rather than always assuming the maximum possible BCLK rate will be
required generate BCLKs for stereo if either one or two channels is
enabled. In order to support this we also need to ensure that only
the relevant channels are enabled.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

When lowering SYSCLK to 50kHz for accessory detection also lower the
AIFnCLK divisor to normalise the clocking configuration within the
device. This will not disrupt audio as we cannot support active audio
with such a low SYSCLK.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This can be used to provide some additional settling time to ensure that
we don't start microphone detection while the microphone pin is connected
to one of the headphone pins.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

There are some new WM1811 variants distinguished by both revision and
cust_id which need slightly different handling.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Sometimes the analogue circuitry connected to the microphone needs some
time to settle after power up. Allow systems to configure this delay in
the platform data, the driver will then insert the required delay during
power up of paths that involve the microphone.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

If DRC coefficients are not configured via platform data then add bytes
controls for them instead so they can be configured by applications. This
is the normal means of controlling things like this for newer systems, we
maintain compatibility with platform data to avoid disruption to existing
systems.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NChris Rattray <crattray@opensource.wolfsonmicro.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NChris Rattray <crattray@opensource.wolfsonmicro.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Since jackdet only reports deltas it won't generate an interrupt on startup
when a jack is not present. This doesn't make a difference to userspace
but does mean we don't generate a notification via the internal notifier
chains. Fix that by scheduling a work to poll the chip after the clock is
enabled. Use an extremely large timeout since there's no urgency and we
don't want to report a false negative.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Further wm_hubs code will use this.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

The FLLs in the WM8994 series devices can be started without any reference
being supplied, mainly for use in analogue bypass cases. Implement support
for this mode.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Ensures that we don't interact badly with the power management framework,
especially in the cases where we're doing deferred work or we're using a
direct GPIO for these signals.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Otherwise if someone tries to use all four channels on AIF1 with the
device in master mode we won't be able to clock out all the data.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

The conversion of the core driver to irqdomains means that we don't need
and irq_base to have working interrupts so use wm8994_request_irq() to
deal with looking up the interrupt number for the micdet IRQ.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Leave it up to the machine driver to disable accessory detection if
desired, the common pattern is to have accessory detection be a wake
source.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

It seems that the code duplication was added at a merge operation.
Signed-off-by: NJaroslav Kysela <perex@perex.cz>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Volume updates may not be acted upon if there is no clock applied when
the volume update is written. Ensure this doesn't happen by writing out
registers with volume updates after we enable each of the clocks.

There are more registers updated than before as previously we were
relying on wm_hubs to set those for controls it manages.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

Ensure that all the actions get taken at appropriate times by calling the
_PRE and _POST events for the aifNclk_ev functions explicitly.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

Make it clearer what context we're operating in.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Since the analogue portions of the checks for class W are the same over
all the devices factor out these checks into wm_hubs and while we're at
it also use wm_hubs_dac_hp_direct() to enable class W optimisations on
more paths.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

The optimisations which we can do with caching the headphone DCS result in
wm_hubs have only been enabled in cases where class W is enabled. However,
there are more use cases which can benefit from the cache, especially with
WM8994 series devices with their more advanced digital routing.

Rather than keying off the class W information from the CODECs have a
check in wm_hubs for a suitable path and use that to determine if we can
deploy our headphone optimisations.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This can be helpful to users when tuning their systems.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

If a driver using a custom mic detection callback has provided a table
of mic detection rates via platform data then use it.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Use a slightly larger debounce when identifying accessory type and a
slightly smaller one when detecting buttons in response to user feedback
from large scale testing.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>