The A31 SoC's codec has various inputs, outputs and microphone bias
supplies. These can be routed on the board in different ways, such as:
- Microphones all use the MBIAS main microphone supply or one mic may
use the HBIAS supply, which supports headset detection and buttons.
- Line Out may be routed to an audio jack, or an onboard speaker amp
with power controls.
Add support for specifying the audio routes in the device tree.
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
.../devicetree/bindings/sound/sun4i-codec.txt | 35 ++++++++++++++++++++++
sound/soc/sunxi/sun4i-codec.c | 21 +++++++++++--
2 files changed, 54 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/sun4i-codec.txt b/Documentation/devicetree/bindings/sound/sun4i-codec.txt
index 1d2411cea98d..893f37413943 100644
--- a/Documentation/devicetree/bindings/sound/sun4i-codec.txt
+++ b/Documentation/devicetree/bindings/sound/sun4i-codec.txt
@@ -19,6 +19,32 @@ Required properties:
Optional properties:
- allwinner,pa-gpios: gpio to enable external amplifier
+Required properties for "allwinner,sun6i-a31-codec":
+- allwinner,audio-routing: A list of the connections between audio components.
+ Each entry is a pair of strings, the first being the
+ connection's sink, the second being the connection's
+ source. Valid names include:
+
+ Audio pins on the SoC:
+ "HP"
+ "LINEIN"
+ "LINEOUT"
+ "MIC1"
+ "MIC2"
+ "MIC3"
+
+ Microphone biases from the SoC:
+ "HBIAS"
+ "MBIAS"
+
+ Board connectors:
+ "Headphone"
+ "Headset Mic"
+ "Line In"
+ "Line Out"
+ "Mic"
+ "Speaker"
+
Example:
codec: codec@01c22c00 {
#sound-dai-cells = <0>;
@@ -29,4 +55,13 @@ codec: codec@01c22c00 {
clock-names = "apb", "codec";
dmas = <&dma 0 19>, <&dma 0 19>;
dma-names = "rx", "tx";
+ allwinner,pa-gpios = <&pio 7 22 GPIO_ACTIVE_HIGH>; /* PH22 */
+ allwinner,audio-routing =
+ "Headphone", "HP",
+ "Speaker", "LINEOUT",
+ "LINEIN", "Line In",
+ "MIC1", "MBIAS",
+ "MIC1", "Mic",
+ "MIC2", "HBIAS",
+ "MIC2", "Headset Mic";
};
diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index cd21914fd01f..4c364e6410dd 100644
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -1133,9 +1133,19 @@ static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)
return card;
};
+static const struct snd_soc_dapm_widget sun6i_codec_card_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone", NULL),
+ SND_SOC_DAPM_LINE("Line In", NULL),
+ SND_SOC_DAPM_LINE("Line Out", NULL),
+ SND_SOC_DAPM_MIC("Headset Mic", NULL),
+ SND_SOC_DAPM_MIC("Mic", NULL),
+ SND_SOC_DAPM_SPK("Speaker", sun4i_codec_spk_event),
+};
+
static struct snd_soc_card *sun6i_codec_create_card(struct device *dev)
{
struct snd_soc_card *card;
+ int ret;
card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
if (!card)
@@ -1145,8 +1155,15 @@ static struct snd_soc_card *sun6i_codec_create_card(struct device *dev)
if (!card->dai_link)
return NULL;
- card->dev = dev;
- card->name = "sun4i-codec";
+ card->dev = dev;
+ card->name = "sun4i-codec";
+ card->dapm_widgets = sun6i_codec_card_dapm_widgets;
+ card->num_dapm_widgets = ARRAY_SIZE(sun6i_codec_card_dapm_widgets);
+ card->fully_routed = true;
+
+ ret = snd_soc_of_parse_audio_routing(card, "allwinner,audio-routing");
+ if (ret)
+ dev_warn(dev, "failed to parse audio-routing: %d\n", ret);
return card;
};
--
2.9.3
--
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