[PATCH 00/14] ASoc: sunxi: Add Allwinner A33 codec driver

Mylène Josserand
2016-10-04T09:46:13Z

Hi everyone,

This patchset add the audio codec for Allwinner A33 (sun8i) SoC.

It adds different drivers:
- sun8i-codec-analog (patch 4): This driver implements the analog part
of the audio codec. The analog part is handled in PRCM registers so this
driver must be added as prcm's subnode (patch 5).
- sun8i-codec (patch 6): This driver implements the digital part of the
A33 codec.
- sun8i (patch 7): This driver implements a sound card for A33.
It links the DAI and the audio codec. The analog codec driver is handled
as an "aux_device".

The DAI for this codec is the same than for A20: "sun4i-i2s".
The digital codec code is coming from Allwinner's BSP (after some
cleanup and DAPM conversion) [1]
The analog codec driver is coming from Chen-Yu Tsai's driver [2]
with some modifications (such as read/write regmap functions).

Currently, all the drivers handle only the playback feature.
The other ones (such as capture) and all other interfaces except
headphone are not supported.

These drivers are functional except for one issue. When playing a sound
for the first time, a short delay can be noticed. On a second play
(right after), the sound is played correctly. If we wait a short time
(~5 sec), the delay is back.
There is the same behavior for left/right channel. On the first
time, a left sound is played on the left channel but in the second
time, the sound will be played on wrong channel.

These issues will be fixed in a second time. Is someone have suggestions
about it?

Examples of amixer commands:
amixer set 'Headphone' 75%
amixer set 'Headphone' on
amixer set 'DAC' on
amixer set 'Right DAC Mixer RSlot 0' on
amixer set 'Left DAC Mixer LSlot 0' on
amixer set 'DAC Reversed Right' on
amixer set 'DAC Reversed Left' on

It was tested on Parrot and Sinlinx board where device tree's modifications
are added (patch 11 to 14).

Thank you in advance,
Best regards,

[1]: https://github.com/allwinner-zh/linux-3.4-sunxi/blob/master/sound/soc/sunxi/audiocodec/sun8iw5_sndcodec.c
[2]: https://github.com/wens/linux/tree/a31-audio

Mylène Josserand (14):
dma: sun6i-dma: Add burst case of 4
clk: ccu-sun8i-a33: Add CLK_SET_RATE_PARENT to ac-dig
ASoC: sun4i-i2s: Add apb reset
ASoC: Add sun8i analog codec driver
mfd: sun6i-prcm: Add sun8i analog codec as subnode
ASoC: Add sun8i digital audio codec
ASoC: Add sun8i audio card
dt-bindings: sound: Add sun8i analog codec documentation
dt-bindings: sound: Add sun8i codec documentation
dt-bindings: sound: Add sun8i audio card documentation
ARM: dts: sun8i: Add analog codec on prcm node
ARM: dts: sun8i: Add audio codec, dai and card for A33
ARM: dts: sun8i: parrot: Enable audio nodes
ARM: dts: sun8i: sinlinx: Enable audio nodes

.../devicetree/bindings/sound/sun8i-audio.txt | 17 +
.../bindings/sound/sun8i-codec-analog.txt | 20 +
.../devicetree/bindings/sound/sun8i-codec.txt | 24 +
arch/arm/boot/dts/sun8i-a23-a33.dtsi | 7 +
arch/arm/boot/dts/sun8i-a33-sinlinx-sina33.dts | 8 +
arch/arm/boot/dts/sun8i-a33.dtsi | 33 ++
arch/arm/boot/dts/sun8i-r16-parrot.dts | 8 +
drivers/clk/sunxi-ng/ccu-sun8i-a33.c | 2 +-
drivers/dma/sun6i-dma.c | 2 +
drivers/mfd/sun6i-prcm.c | 16 +
sound/soc/sunxi/Kconfig | 30 ++
sound/soc/sunxi/Makefile | 3 +
sound/soc/sunxi/sun4i-i2s.c | 16 +-
sound/soc/sunxi/sun8i-codec-analog.c | 305 +++++++++++++
sound/soc/sunxi/sun8i-codec.c | 492 +++++++++++++++++++++
sound/soc/sunxi/sun8i.c | 101 +++++
16 files changed, 1082 insertions(+), 2 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/sun8i-audio.txt
create mode 100644 Documentation/devicetree/bindings/sound/sun8i-codec-analog.txt
create mode 100644 Documentation/devicetree/bindings/sound/sun8i-codec.txt
create mode 100644 sound/soc/sunxi/sun8i-codec-analog.c
create mode 100644 sound/soc/sunxi/sun8i-codec.c
create mode 100644 sound/soc/sunxi/sun8i.c

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2.9.3