Commit graph

5 commits

Author SHA1 Message Date
Mark Brown
fec6dd833e ASoC: Store DC offset correction for wm_hubs devices in class W mode
Providing the analogue configuration of the output path remains the same
the DC offset corrected by the DC servo will remain identical so we can
skip the callibration, reducing the startup time for the headphone output.
Implement this for the wm_hubs devices as has been done for several other
CODECs.

Don't do this if we have any analogue paths enabled since offsets may be
being introduced by the analogue paths which could vary outside the
control of the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-10-28 11:34:03 -07:00
Mark Brown
8437f7006b ASoC: Support second DC servo readback method for wm_hubs
More recent Wolfson hubs devices add the ability to read back the DC
servo calibration information from the register used to write offsets,
and later still ones remove the old readback registers. Add support
for the new scheme, and use it for WM8994 device revisions that
support it.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-04-05 16:19:09 +01:00
Mark Brown
3ed7074c4c ASoC: Improved wm_hubs headphone handling
Perform DC servo offset calibration using a series update sequence
rather than startup update sequence, tuning the configuration of the
WM8993 DC servo to make best use of this.

Also introduce currently unused data allowing us to correct for
any systematic errors in the DC servo calibration results and an
alternative startup path for the headphone output which performs
better with some chip revisions.  The alternative setup sequence is
enabled for WM8993.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-02-01 18:35:46 +00:00
Mark Brown
aa983d9d63 ASoC: Factor out analogue platform data from WM8993
This is also shared with newer CODECs.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-09-30 15:51:37 +01:00
Mark Brown
a2342ae325 ASoC: Factor out shared code from WM8993
The WM8993 analogue control is shared with other devices in the same
product line.  Since this is a very substantial proportion of the
driver move the definitions of these controls into a new wm_hubs module
which allows them to be shared between the two.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-08-13 22:19:31 +01:00