[v3] ASoC: AMD: Use mixer control to switch between DMICs

[v3] ASoC: AMD: Use mixer control to switch between DMICs

[Akshu Agrawal]

Having mixer control to switch between DMICs prevents user to
initiate capture simultaneously on both the DMIcs.
Earlier 2 separate devices, one for each DMIC, gave an option of
using them simultaneously, which is not supported.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
v2: Modified "Front Mic" to "DMIC Switch"
v3: Changed to using of Mux

 sound/soc/amd/acp3x-rt5682-max9836.c | 58 +++++++++++++++-------------
 1 file changed, 31 insertions(+), 27 deletions(-)

diff --git a/sound/soc/amd/acp3x-rt5682-max9836.c b/sound/soc/amd/acp3x-rt5682-max9836.c
index e499c00e0c66..f745b42dfd23 100644
--- a/sound/soc/amd/acp3x-rt5682-max9836.c
+++ b/sound/soc/amd/acp3x-rt5682-max9836.c
@@ -188,25 +188,27 @@ static int acp3x_ec_dmic0_startup(struct snd_pcm_substream *substream)
 
 	machine->cap_i2s_instance = I2S_BT_INSTANCE;
 	snd_soc_dai_set_bclk_ratio(codec_dai, 64);
-	if (dmic_sel)
-		gpiod_set_value(dmic_sel, 0);
 
 	return rt5682_clk_enable(substream);
 }
 
-static int acp3x_ec_dmic1_startup(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_card *card = rtd->card;
-	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
-	struct acp3x_platform_info *machine = snd_soc_card_get_drvdata(card);
+static int dmic_switch;
 
-	machine->cap_i2s_instance = I2S_BT_INSTANCE;
-	snd_soc_dai_set_bclk_ratio(codec_dai, 64);
-	if (dmic_sel)
-		gpiod_set_value(dmic_sel, 1);
+static int dmic_get(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.integer.value[0] = dmic_switch;
+	return 0;
+}
 
-	return rt5682_clk_enable(substream);
+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 rt5682_shutdown(struct snd_pcm_substream *substream)
@@ -229,11 +231,6 @@ static const struct snd_soc_ops acp3x_ec_cap0_ops = {
 	.shutdown = rt5682_shutdown,
 };
 
-static const struct snd_soc_ops acp3x_ec_cap1_ops = {
-	.startup = acp3x_ec_dmic1_startup,
-	.shutdown = rt5682_shutdown,
-};
-
 SND_SOC_DAILINK_DEF(acp3x_i2s,
 	DAILINK_COMP_ARRAY(COMP_CPU("acp3x_i2s_playcap.0")));
 SND_SOC_DAILINK_DEF(acp3x_bt,
@@ -279,21 +276,26 @@ static struct snd_soc_dai_link acp3x_dai_5682_98357[] = {
 		.ops = &acp3x_ec_cap0_ops,
 		SND_SOC_DAILINK_REG(acp3x_bt, cros_ec, platform),
 	},
-	{
-		.name = "acp3x-ec-dmic1-capture",
-		.stream_name = "Capture DMIC1",
-		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
-				| SND_SOC_DAIFMT_CBS_CFS,
-		.dpcm_capture = 1,
-		.ops = &acp3x_ec_cap1_ops,
-		SND_SOC_DAILINK_REG(acp3x_bt, cros_ec, platform),
-	},
 };
 
+static const char * const dmic_mux_text[] = {
+	"Front Mic",
+	"Rear Mic",
+};
+
+static SOC_ENUM_SINGLE_DECL(
+		acp3x_dmic_enum, SND_SOC_NOPM, 0, dmic_mux_text);
+
+static const struct snd_kcontrol_new acp3x_dmic_mux_control =
+	SOC_DAPM_ENUM_EXT("DMIC Select Mux", acp3x_dmic_enum,
+			  dmic_get, dmic_set);
+
 static const struct snd_soc_dapm_widget acp3x_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
 	SND_SOC_DAPM_SPK("Spk", NULL),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+	SND_SOC_DAPM_MUX("Dmic Mux", SND_SOC_NOPM, 0, 0,
+			 &acp3x_dmic_mux_control),
 };
 
 static const struct snd_soc_dapm_route acp3x_audio_route[] = {
@@ -301,6 +303,8 @@ static const struct snd_soc_dapm_route acp3x_audio_route[] = {
 	{"Headphone Jack", NULL, "HPOR"},
 	{"IN1P", NULL, "Headset Mic"},
 	{"Spk", NULL, "Speaker"},
+	{"Dmic Mux", "Front Mic", "DMIC"},
+	{"Dmic Mux", "Rear Mic", "DMIC"},
 };
 
 static const struct snd_kcontrol_new acp3x_mc_controls[] = {
-- 
2.20.1

Re: [v3] ASoC: AMD: Use mixer control to switch between DMICs

[Mark Brown]

On Sat, 30 May 2020 15:25:06 +0530, Akshu Agrawal wrote:
> Having mixer control to switch between DMICs prevents user to
> initiate capture simultaneously on both the DMIcs.
> Earlier 2 separate devices, one for each DMIC, gave an option of
> using them simultaneously, which is not supported.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: AMD: Use mixer control to switch between DMICs
      commit: b7a742cff3f618d848e62e5a1ade0ff816e93092

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark