Add ADC support for the sun8i-codec driver.

This driver uses microphones widgets and routes provided by the
analog part (sun8i-codec-analog).
Some digital configurations are needed by creating new ADC widgets
and routes.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The current code might be a bit intriguing without having experienced the
issue before, and might come up as a mistake.

Make explicit what's going on by adding a comment.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

While the current code was reporting to be able to work in master mode, it
failed to do so because the BCLK divider wasn't programmed, meaning that
the BCLK would run at the PLL's frequency no matter the sample rate.

It was obviously a bit too fast.

Add support to retrieve the divider to use, and set it. Since our PLL is
not always able to generate a perfect multiple of the sample rate, we'll
have to choose the closest divider that matches our setup.

Fixes: 36c68493 ("ASoC: Add sun8i digital audio codec")
Reviewed-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>

Since its introduction, the codec had an inversion of the left and right
channels. It turned out to be pretty simple as it appears that the codec
doesn't have the same polarity on the LRCK signal than the I2S block.

Fix this by inverting our bit value for the LRCK inversion.

Fixes: 36c68493 ("ASoC: Add sun8i digital audio codec")
Cc: <stable@vger.kernel.org>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

The current code had the condition backward when checking if the codec
should be running in slave or master mode.

Fix it, and make the comment a bit more readable.

Fixes: 36c68493 ("ASoC: Add sun8i digital audio codec")
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>

Declare snd_soc_codec_driver structures as const as they are either
passed as an argument to the function snd_soc_register_codec or stored as
reference in field codec of type sun4i_codec_quirks. Both the fucntion
argument and the codec field are of type const, so declare the
structures with this property as const.
Signed-off-by: NBhumika Goyal <bhumirks@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

This structure is only stored in the ops field of a snd_soc_dai_driver
structure. That field is declared const, so snd_soc_dai_ops structures
that have this property can be declared as const also.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Update the driver to use SND_SOC_DAPM_AIF_IN instead of
SND_SOC_DAPM_DAC.
Rename the interface's widgets to be more precise on which slot
the interface is connected.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

An unwanted space is present in an audio widget's name on the dapm
routing. It causes an error on the recognition of this widget (error:
("no dapm match for AIF1 Slot 0 Right").

Remove the space fixes it.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

Update the driver to use the new SOC_DAPM_DOUBLE definition
on the digital DAC mixer.
Update the names accordingly as, when they are shared, the
controls are not prefixed with the widget's name anymore.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

The "HP" widget is already present and take part to
the analog part (sun8i-codec-analog).

Remove it from the digital part as it is unnecessary.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

Update the driver to use SND_SOC_DAPM_AIF_IN instead of
SND_SOC_DAPM_DAC.
Rename the interface's widgets to be more precise on which slot
the interface is connected.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

An unwanted space is present in an audio widget's name on the dapm
routing. It causes an error on the recognition of this widget (error:
("no dapm match for AIF1 Slot 0 Right").

Remove the space fixes it.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

SOC_MIXER_ARRAY is a simplified function of SND_SOC_DAPM_MIXER
which handles automatically the ARRAY_SIZE of controls.

Update the driver to use SOC_MIXER_ARRAY.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

Update the driver to use the new SOC_DAPM_DOUBLE definition
on the digital DAC mixer.
Update the names accordingly as, when they are shared, the
controls are not prefixed with the widget's name anymore.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

The "HP" widget is already present and take part to
the analog part (sun8i-codec-analog).

Remove it from the digital part as it is unnecessary.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add the sun8i audio codec which handles the digital register of
A33 codec.
The driver handles only the basic playback from the DAC to headphones.
All other features (microphone, capture, etc) will be added later.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMark Brown <broonie@kernel.org>