[PATCH v2 0/2] Modify documentation and machine driver for SC7180 sound card
Note: - The patch is made by the collaboration of Ajye Huang ajye_huang@compal.corp-partner.google.com Cheng-Yi Chiang cychiang@chromium.org
Changes from v1 to v2: - Ducumentation: 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 | 59 +++++++++++++++++++ 2 files changed, 117 insertions(+)
Add a property "dmic-gpios" for switching between two MICs.
Signed-off-by: Ajye Huang ajye_huang@compal.corp-partner.google.com --- .../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>; + }; + }; + }; + +...
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 ajye_huang@compal.corp-partner.google.com --- sound/soc/qcom/sc7180.c | 59 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+)
diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c index b391f64c3a80..e9366bb5f3c2 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> @@ -23,6 +25,9 @@
#define DRIVER_NAME "SC7180"
+static struct gpio_desc *dmic_sel; +static int dmic_switch; + struct sc7180_snd_data { struct snd_soc_card card; u32 pri_mi2s_clk_count; @@ -169,6 +174,23 @@ 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) +{ + ucontrol->value.integer.value[0] = dmic_switch; + return 0; +} + +static int dmic_set(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + if (dmic_sel) { + dmic_switch = ucontrol->value.integer.value[0]; + gpiod_set_value(dmic_sel, 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 +228,30 @@ 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 +284,19 @@ 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), + dmic_sel = devm_gpiod_get(&pdev->dev, "dmic", GPIOD_OUT_LOW); + if (IS_ERR(dmic_sel)) { + dev_err(&pdev->dev, "DMIC gpio failed err=%d\n", + PTR_ERR(dmic_sel)); + return PTR_ERR(dmic_sel); + } + } + ret = qcom_snd_parse_of(card); if (ret) return ret;
On Fri, Oct 30, 2020 at 3:57 PM Ajye Huang ajye.huang@gmail.com wrote:
+static struct gpio_desc *dmic_sel; +static int dmic_switch;
If you really need them, you should put them in struct sc7180_snd_data.
+static int dmic_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)+{
if (dmic_sel) {
if (IS_ERR(dmic_sel)) But I think you don't need to check dmic_sel. Suppose your _probe() already returned error, the code here shouldn't be called.
dmic_switch = ucontrol->value.integer.value[0];
Looks like it can be a local variable. You don't need to save dmic_switch.
On Fri, Oct 30, 2020 at 5:23 PM Tzung-Bi Shih tzungbi@google.com wrote:
On Fri, Oct 30, 2020 at 3:57 PM Ajye Huang ajye.huang@gmail.com wrote:
+static struct gpio_desc *dmic_sel; +static int dmic_switch;
If you really need them, you should put them in struct sc7180_snd_data.
Thank you, I will do it.
+static int dmic_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)+{
if (dmic_sel) {if (IS_ERR(dmic_sel)) But I think you don't need to check dmic_sel. Suppose your _probe() already returned error, the code here shouldn't be called.
OK, I will remove the discriminant if (dmic_sel) {
dmic_switch = ucontrol->value.integer.value[0];Looks like it can be a local variable. You don't need to save dmic_switch.
But dmic_get() will need dmic_switch, should i keep dmic_switch? static int dmic_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { ucontrol->value.integer.value[0] = dmic_switch; return 0; }
On Fri, Oct 30, 2020 at 6:55 PM Ajye Huang ajye_huang@compal.corp-partner.google.com wrote:
But dmic_get() will need dmic_switch, should i keep dmic_switch?
I see. I overlooked it. You can keep the dmic_switch for this purpose or just call gpiod_get_value_cansleep().
Hi, Tzung-Bi I will release v3 version base on your suggestion
Thank you for your reply Ajye
Tzung-Bi Shih tzungbi@google.com 於 2020年10月30日 週五 下午7:19寫道：
On Fri, Oct 30, 2020 at 6:55 PM Ajye Huang ajye_huang@compal.corp-partner.google.com wrote:
But dmic_get() will need dmic_switch, should i keep dmic_switch?
I see. I overlooked it. You can keep the dmic_switch for this purpose or just call gpiod_get_value_cansleep().
participants (3)
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Ajye Huang -
Ajye Huang -
Tzung-Bi Shih