Note:
- The patch is made by the collaboration of
Ajye Huang <[email protected]>
Cheng-Yi Chiang <[email protected]>
v5:
- Machine driver:
- Fix a format string warning (Reported-by: kernel test robot <[email protected]>).
detailed info at https://lore.kernel.org/patchwork/patch/1331087/
v4:
- Machine driver: Addressed suggestions from Tzung-Bi.
- Remove redundant judgments in dmic_set() and dmic_get().
- Remove 1 level indent of judgment of IS_ERR(data->dmic_sel).
v3:
- Machine driver: Addressed suggestions from Tzung-Bi.
- move variables "dmic_switch" and "dmic_sel" into struct sc7180_snd_data.
- Remove redundant judgments in dmic_set().
v2:
- Documentation: Modify the dimc-gpios property description and examples.
- Machine driver:
- Remove "qcom,sc7180-sndcard-rt5682-m98357-2mic" compatible
- See gpio property and use anadditional control.
Thanks for the review!
Ajye Huang (2):
ASoC: google: dt-bindings: modify machine bindings for two MICs case
ASoC: qcom: sc7180: Modify machine driver for 2mic
.../bindings/sound/google,sc7180-trogdor.yaml | 58 ++++++++++++++++++
sound/soc/qcom/sc7180.c | 61 +++++++++++++++++++
2 files changed, 119 insertions(+)
--
2.25.1
Add a property "dmic-gpios" for switching between two MICs.
Signed-off-by: Ajye Huang <[email protected]>
---
.../bindings/sound/google,sc7180-trogdor.yaml | 58 +++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
index efc34689d6b5..9e0505467e57 100644
--- a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
+++ b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
@@ -34,6 +34,9 @@ properties:
"#size-cells":
const: 0
+ dmic-gpios:
+ description: GPIO for switching between DMICs
+
patternProperties:
"^dai-link(@[0-9])?$":
description:
@@ -81,6 +84,7 @@ additionalProperties: false
examples:
- |
+ //Example 1
sound {
compatible = "google,sc7180-trogdor";
model = "sc7180-rt5682-max98357a-1mic";
@@ -128,3 +132,57 @@ examples:
};
};
};
+
+ - |
+ //Example 2 (2mic case)
+ sound {
+ compatible = "google,sc7180-trogdor";
+ model = "sc7180-rt5682-max98357a-2mic";
+
+ audio-routing =
+ "Headphone Jack", "HPOL",
+ "Headphone Jack", "HPOR";
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dmic-gpios = <&tlmm 86 0>;
+
+ dai-link@0 {
+ link-name = "MultiMedia0";
+ reg = <0>;
+ cpu {
+ sound-dai = <&lpass_cpu 0>;
+ };
+
+ codec {
+ sound-dai = <&alc5682 0>;
+ };
+ };
+
+ dai-link@1 {
+ link-name = "MultiMedia1";
+ reg = <1>;
+ cpu {
+ sound-dai = <&lpass_cpu 1>;
+ };
+
+ codec {
+ sound-dai = <&max98357a>;
+ };
+ };
+
+ dai-link@2 {
+ link-name = "MultiMedia2";
+ reg = <2>;
+ cpu {
+ sound-dai = <&lpass_hdmi 0>;
+ };
+
+ codec {
+ sound-dai = <&msm_dp>;
+ };
+ };
+ };
+
+...
--
2.25.1
In addition, having mixer control to switch between DMICs by
using "dmic-gpios" property.
Refer to this one as an example,
commit b7a742cff3f6 ("ASoC: AMD: Use mixer control to switch between DMICs")
Signed-off-by: Ajye Huang <[email protected]>
Reviewed-by: Tzung-Bi Shih <[email protected]>
---
sound/soc/qcom/sc7180.c | 61 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c
index b391f64c3a80..455d3f2b8ce8 100644
--- a/sound/soc/qcom/sc7180.c
+++ b/sound/soc/qcom/sc7180.c
@@ -5,6 +5,8 @@
// sc7180.c -- ALSA SoC Machine driver for SC7180
#include <dt-bindings/sound/sc7180-lpass.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
@@ -28,6 +30,8 @@ struct sc7180_snd_data {
u32 pri_mi2s_clk_count;
struct snd_soc_jack hs_jack;
struct snd_soc_jack hdmi_jack;
+ struct gpio_desc *dmic_sel;
+ int dmic_switch;
};
static void sc7180_jack_free(struct snd_jack *jack)
@@ -169,6 +173,27 @@ static int sc7180_snd_startup(struct snd_pcm_substream *substream)
return 0;
}
+static int dmic_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
+ struct sc7180_snd_data *data = snd_soc_card_get_drvdata(dapm->card);
+
+ ucontrol->value.integer.value[0] = data->dmic_switch;
+ return 0;
+}
+
+static int dmic_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
+ struct sc7180_snd_data *data = snd_soc_card_get_drvdata(dapm->card);
+
+ data->dmic_switch = ucontrol->value.integer.value[0];
+ gpiod_set_value(data->dmic_sel, data->dmic_switch);
+ return 0;
+}
+
static void sc7180_snd_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
@@ -206,6 +231,30 @@ static const struct snd_soc_dapm_widget sc7180_snd_widgets[] = {
SND_SOC_DAPM_MIC("Headset Mic", NULL),
};
+static const char * const dmic_mux_text[] = {
+ "Front Mic",
+ "Rear Mic",
+};
+
+static SOC_ENUM_SINGLE_DECL(sc7180_dmic_enum,
+ SND_SOC_NOPM, 0, dmic_mux_text);
+
+static const struct snd_kcontrol_new sc7180_dmic_mux_control =
+ SOC_DAPM_ENUM_EXT("DMIC Select Mux", sc7180_dmic_enum,
+ dmic_get, dmic_set);
+
+static const struct snd_soc_dapm_widget sc7180_snd_dual_mic_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_MIC("Headset Mic", NULL),
+ SND_SOC_DAPM_MIC("DMIC", NULL),
+ SND_SOC_DAPM_MUX("Dmic Mux", SND_SOC_NOPM, 0, 0, &sc7180_dmic_mux_control),
+};
+
+static const struct snd_soc_dapm_route sc7180_snd_dual_mic_audio_route[] = {
+ {"Dmic Mux", "Front Mic", "DMIC"},
+ {"Dmic Mux", "Rear Mic", "DMIC"},
+};
+
static void sc7180_add_ops(struct snd_soc_card *card)
{
struct snd_soc_dai_link *link;
@@ -238,6 +287,18 @@ static int sc7180_snd_platform_probe(struct platform_device *pdev)
card->dapm_widgets = sc7180_snd_widgets;
card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets);
+ if (of_property_read_bool(dev->of_node, "dmic-gpios")) {
+ card->dapm_widgets = sc7180_snd_dual_mic_widgets,
+ card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_dual_mic_widgets),
+ card->dapm_routes = sc7180_snd_dual_mic_audio_route,
+ card->num_dapm_routes = ARRAY_SIZE(sc7180_snd_dual_mic_audio_route),
+ data->dmic_sel = devm_gpiod_get(&pdev->dev, "dmic", GPIOD_OUT_LOW);
+ if (IS_ERR(data->dmic_sel)) {
+ dev_err(&pdev->dev, "DMIC gpio failed err=%ld\n", PTR_ERR(data->dmic_sel));
+ return PTR_ERR(data->dmic_sel);
+ }
+ }
+
ret = qcom_snd_parse_of(card);
if (ret)
return ret;
--
2.25.1
On Tue, Nov 03, 2020 at 06:30:50PM +0800, Ajye Huang wrote:
> Add a property "dmic-gpios" for switching between two MICs.
>
> Signed-off-by: Ajye Huang <[email protected]>
> ---
> .../bindings/sound/google,sc7180-trogdor.yaml | 58 +++++++++++++++++++
> 1 file changed, 58 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> index efc34689d6b5..9e0505467e57 100644
> --- a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> +++ b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> @@ -34,6 +34,9 @@ properties:
> "#size-cells":
> const: 0
>
> + dmic-gpios:
> + description: GPIO for switching between DMICs
Need to define how many (maxItems: 1).
> +
> patternProperties:
> "^dai-link(@[0-9])?$":
> description:
> @@ -81,6 +84,7 @@ additionalProperties: false
> examples:
>
> - |
> + //Example 1
> sound {
> compatible = "google,sc7180-trogdor";
> model = "sc7180-rt5682-max98357a-1mic";
> @@ -128,3 +132,57 @@ examples:
> };
> };
> };
> +
> + - |
> + //Example 2 (2mic case)
> + sound {
> + compatible = "google,sc7180-trogdor";
> + model = "sc7180-rt5682-max98357a-2mic";
> +
> + audio-routing =
> + "Headphone Jack", "HPOL",
> + "Headphone Jack", "HPOR";
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + dmic-gpios = <&tlmm 86 0>;
Do we really need another example for this? Can't you just add it to the
existing example?
> +
> + dai-link@0 {
> + link-name = "MultiMedia0";
> + reg = <0>;
> + cpu {
> + sound-dai = <&lpass_cpu 0>;
> + };
> +
> + codec {
> + sound-dai = <&alc5682 0>;
> + };
> + };
> +
> + dai-link@1 {
> + link-name = "MultiMedia1";
> + reg = <1>;
> + cpu {
> + sound-dai = <&lpass_cpu 1>;
> + };
> +
> + codec {
> + sound-dai = <&max98357a>;
> + };
> + };
> +
> + dai-link@2 {
> + link-name = "MultiMedia2";
> + reg = <2>;
> + cpu {
> + sound-dai = <&lpass_hdmi 0>;
> + };
> +
> + codec {
> + sound-dai = <&msm_dp>;
> + };
> + };
> + };
> +
> +...
> --
> 2.25.1
>