[PATCH 1/2] ASoC: nau8810: change input PGA mixer stage

[PATCH 1/2] ASoC: nau8810: change input PGA mixer stage

[John Hsu]

Organize the paths of the mixer, "Input Boost Stage", including
the routes of the mixer. The control is not used correctly before.
Besides, the driver changes the name of the mixer controls.

Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
---
 sound/soc/codecs/nau8810.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/sound/soc/codecs/nau8810.c b/sound/soc/codecs/nau8810.c
index ca2ba1c..bfd74b8 100644
--- a/sound/soc/codecs/nau8810.c
+++ b/sound/soc/codecs/nau8810.c
@@ -373,9 +373,11 @@ static const struct snd_kcontrol_new nau8810_mono_mixer_controls[] = {
 };
 
 /* PGA Mute */
-static const struct snd_kcontrol_new nau8810_inpga_mute[] = {
+static const struct snd_kcontrol_new nau8810_pgaboost_mixer_controls[] = {
 	SOC_DAPM_SINGLE("PGA Mute Switch", NAU8810_REG_PGAGAIN,
-		NAU8810_PGAMT_SFT, 1, 0),
+		NAU8810_PGAMT_SFT, 1, 1),
+	SOC_DAPM_SINGLE("PMIC PGA Switch", NAU8810_REG_ADCBOOST,
+		NAU8810_PMICBSTGAIN_SFT, 0x7, 0),
 };
 
 /* Input PGA */
@@ -386,11 +388,6 @@ static const struct snd_kcontrol_new nau8810_inpga[] = {
 		NAU8810_PMICPGA_SFT, 1, 0),
 };
 
-/* Mic Input boost vol */
-static const struct snd_kcontrol_new nau8810_mic_boost_controls =
-	SOC_DAPM_SINGLE("Mic Volume", NAU8810_REG_ADCBOOST,
-		NAU8810_PMICBSTGAIN_SFT, 0x7, 0);
-
 /* Loopback Switch */
 static const struct snd_kcontrol_new nau8810_loopback =
 	SOC_DAPM_SINGLE("Switch", NAU8810_REG_COMP,
@@ -429,8 +426,8 @@ static const struct snd_soc_dapm_widget nau8810_dapm_widgets[] = {
 		NAU8810_PGA_EN_SFT, 0, nau8810_inpga,
 		ARRAY_SIZE(nau8810_inpga)),
 	SND_SOC_DAPM_MIXER("Input Boost Stage", NAU8810_REG_POWER2,
-		NAU8810_BST_EN_SFT, 0, nau8810_inpga_mute,
-		ARRAY_SIZE(nau8810_inpga_mute)),
+		NAU8810_BST_EN_SFT, 0, nau8810_pgaboost_mixer_controls,
+		ARRAY_SIZE(nau8810_pgaboost_mixer_controls)),
 
 	SND_SOC_DAPM_SUPPLY("Mic Bias", NAU8810_REG_POWER1,
 		NAU8810_MICBIAS_EN_SFT, 0, NULL, 0),
@@ -469,8 +466,8 @@ static const struct snd_soc_dapm_route nau8810_dapm_routes[] = {
 	/* Input Boost Stage */
 	{"ADC", NULL, "Input Boost Stage"},
 	{"ADC", NULL, "PLL", check_mclk_select_pll},
-	{"Input Boost Stage", NULL, "Input PGA"},
-	{"Input Boost Stage", NULL, "MICP"},
+	{"Input Boost Stage", "PGA Mute Switch", "Input PGA"},
+	{"Input Boost Stage", "PMIC PGA Switch", "MICP"},
 
 	/* Input PGA */
 	{"Input PGA", NULL, "Mic Bias"},
-- 
2.6.4

[PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[John Hsu]

The MICBAIS will not supply if there is only one path from MICP to
input boost stage. The driver fixes the issue by changing the supply
target to input boost stage mixer.

Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
---
 sound/soc/codecs/nau8810.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/nau8810.c b/sound/soc/codecs/nau8810.c
index bfd74b8..988bd18 100644
--- a/sound/soc/codecs/nau8810.c
+++ b/sound/soc/codecs/nau8810.c
@@ -468,9 +468,9 @@ static const struct snd_soc_dapm_route nau8810_dapm_routes[] = {
 	{"ADC", NULL, "PLL", check_mclk_select_pll},
 	{"Input Boost Stage", "PGA Mute Switch", "Input PGA"},
 	{"Input Boost Stage", "PMIC PGA Switch", "MICP"},
+	{"Input Boost Stage", NULL, "Mic Bias"},
 
 	/* Input PGA */
-	{"Input PGA", NULL, "Mic Bias"},
 	{"Input PGA", "MicN Switch", "MICN"},
 	{"Input PGA", "MicP Switch", "MICP"},
 
-- 
2.6.4

Re: [PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[Mark Brown]

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On Thu, May 03, 2018 at 10:46:42AM +0800, John Hsu wrote:
> The MICBAIS will not supply if there is only one path from MICP to
> input boost stage. The driver fixes the issue by changing the supply
> target to input boost stage mixer.

Does the input boost stage actually use the MICBIAS supply directly?
More usually a microphone bias would supply the microphone rather than
anything on the chip itself.

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Re: [PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[John Hsu]

On 5/4/2018 7:10 AM, Mark Brown wrote:
> On Thu, May 03, 2018 at 10:46:42AM +0800, John Hsu wrote:
>> The MICBAIS will not supply if there is only one path from MICP to
>> input boost stage. The driver fixes the issue by changing the supply
>> target to input boost stage mixer.
>
> Does the input boost stage actually use the MICBIAS supply directly?
> More usually a microphone bias would supply the microphone rather than
> anything on the chip itself.

The input boost stage has a mixer of two input sources. The normal case
is that MIC goes to input PGA, then to input boot stage. The case is
the original design of the driver. But there is another path that MIC
goes input boot stage directly. The case is less happened but has chance.
Ex. The single-end MIC goes to input boot stage. Therefore, we move
the target of MICBIAS to input boost stage which can supply power for
both cases.



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Re: [PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[Mark Brown]

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On Fri, May 04, 2018 at 09:10:32AM +0800, John Hsu wrote:
> On 5/4/2018 7:10 AM, Mark Brown wrote:
> > On Thu, May 03, 2018 at 10:46:42AM +0800, John Hsu wrote:
> > > The MICBAIS will not supply if there is only one path from MICP to
> > > input boost stage. The driver fixes the issue by changing the supply
> > > target to input boost stage mixer.

> > Does the input boost stage actually use the MICBIAS supply directly?
> > More usually a microphone bias would supply the microphone rather than
> > anything on the chip itself.

> The input boost stage has a mixer of two input sources. The normal case
> is that MIC goes to input PGA, then to input boot stage. The case is
> the original design of the driver. But there is another path that MIC
> goes input boot stage directly. The case is less happened but has chance.
> Ex. The single-end MIC goes to input boot stage. Therefore, we move
> the target of MICBIAS to input boost stage which can supply power for
> both cases.

That's not really answering the question - the issue is that the micbias
is normally connected to the microphone and supplies that, it's not
normally connected to anything in the CODEC itself.  You're talking
about the path for the signal from the microphone which isn't the same
thing as the power to the microphone.  The system could have external
micbiases or use the input for something that isn't actually a
microphone for example.

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Re: [PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[John Hsu]

On 5/5/2018 9:01 AM, Mark Brown wrote:
> On Fri, May 04, 2018 at 09:10:32AM +0800, John Hsu wrote:
>> On 5/4/2018 7:10 AM, Mark Brown wrote:
>>> On Thu, May 03, 2018 at 10:46:42AM +0800, John Hsu wrote:
>>>> The MICBAIS will not supply if there is only one path from MICP to
>>>> input boost stage. The driver fixes the issue by changing the supply
>>>> target to input boost stage mixer.
>
>>> Does the input boost stage actually use the MICBIAS supply directly?
>>> More usually a microphone bias would supply the microphone rather than
>>> anything on the chip itself.
>
>> The input boost stage has a mixer of two input sources. The normal case
>> is that MIC goes to input PGA, then to input boot stage. The case is
>> the original design of the driver. But there is another path that MIC
>> goes input boot stage directly. The case is less happened but has chance.
>> Ex. The single-end MIC goes to input boot stage. Therefore, we move
>> the target of MICBIAS to input boost stage which can supply power for
>> both cases.
>
> That's not really answering the question - the issue is that the micbias
> is normally connected to the microphone and supplies that, it's not
> normally connected to anything in the CODEC itself.  You're talking
> about the path for the signal from the microphone which isn't the same
> thing as the power to the microphone.  The system could have external
> micbiases or use the input for something that isn't actually a
> microphone for example.

Yes, you are right. In the driver, we suppose that the input of codec
is microphone always. Therefore, we make the micbias on to provide the
power of microphone automatically if any input path is enabled.
What advice do you have to deal with micbias? Thank you.



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Re: [PATCH 2/2] ASoC: nau8810: change the target of MIC BIAS supply

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 645 bytes --]

On Mon, May 07, 2018 at 02:57:28PM +0800, John Hsu wrote:

> Yes, you are right. In the driver, we suppose that the input of codec
> is microphone always. Therefore, we make the micbias on to provide the
> power of microphone automatically if any input path is enabled.
> What advice do you have to deal with micbias? Thank you.

Like I say you should just provide the MICBIAS pin and leave it up to
the machine drivers to connect it to whatever microphones it is being
used with.  This means deleting the route from the driver and (in order
to avoid breaking them) adding the relevant route to any machine drivers
that are in mainline already.

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Applied "ASoC: nau8810: change input PGA mixer stage" to the asoc tree

[Mark Brown]

The patch

   ASoC: nau8810: change input PGA mixer stage

has been applied to the asoc tree at

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

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

>From a7ea9385d41716f8dd5f69b4a5deaf836d67d968 Mon Sep 17 00:00:00 2001
From: John Hsu <KCHSU0@nuvoton.com>
Date: Thu, 3 May 2018 10:46:41 +0800
Subject: [PATCH] ASoC: nau8810: change input PGA mixer stage

Organize the paths of the mixer, "Input Boost Stage", including
the routes of the mixer. The control is not used correctly before.
Besides, the driver changes the name of the mixer controls.

Signed-off-by: John Hsu <KCHSU0@nuvoton.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/nau8810.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/sound/soc/codecs/nau8810.c b/sound/soc/codecs/nau8810.c
index ca2ba1c7bb9a..bfd74b86c9d2 100644
--- a/sound/soc/codecs/nau8810.c
+++ b/sound/soc/codecs/nau8810.c
@@ -373,9 +373,11 @@ static const struct snd_kcontrol_new nau8810_mono_mixer_controls[] = {
 };
 
 /* PGA Mute */
-static const struct snd_kcontrol_new nau8810_inpga_mute[] = {
+static const struct snd_kcontrol_new nau8810_pgaboost_mixer_controls[] = {
 	SOC_DAPM_SINGLE("PGA Mute Switch", NAU8810_REG_PGAGAIN,
-		NAU8810_PGAMT_SFT, 1, 0),
+		NAU8810_PGAMT_SFT, 1, 1),
+	SOC_DAPM_SINGLE("PMIC PGA Switch", NAU8810_REG_ADCBOOST,
+		NAU8810_PMICBSTGAIN_SFT, 0x7, 0),
 };
 
 /* Input PGA */
@@ -386,11 +388,6 @@ static const struct snd_kcontrol_new nau8810_inpga[] = {
 		NAU8810_PMICPGA_SFT, 1, 0),
 };
 
-/* Mic Input boost vol */
-static const struct snd_kcontrol_new nau8810_mic_boost_controls =
-	SOC_DAPM_SINGLE("Mic Volume", NAU8810_REG_ADCBOOST,
-		NAU8810_PMICBSTGAIN_SFT, 0x7, 0);
-
 /* Loopback Switch */
 static const struct snd_kcontrol_new nau8810_loopback =
 	SOC_DAPM_SINGLE("Switch", NAU8810_REG_COMP,
@@ -429,8 +426,8 @@ static const struct snd_soc_dapm_widget nau8810_dapm_widgets[] = {
 		NAU8810_PGA_EN_SFT, 0, nau8810_inpga,
 		ARRAY_SIZE(nau8810_inpga)),
 	SND_SOC_DAPM_MIXER("Input Boost Stage", NAU8810_REG_POWER2,
-		NAU8810_BST_EN_SFT, 0, nau8810_inpga_mute,
-		ARRAY_SIZE(nau8810_inpga_mute)),
+		NAU8810_BST_EN_SFT, 0, nau8810_pgaboost_mixer_controls,
+		ARRAY_SIZE(nau8810_pgaboost_mixer_controls)),
 
 	SND_SOC_DAPM_SUPPLY("Mic Bias", NAU8810_REG_POWER1,
 		NAU8810_MICBIAS_EN_SFT, 0, NULL, 0),
@@ -469,8 +466,8 @@ static const struct snd_soc_dapm_route nau8810_dapm_routes[] = {
 	/* Input Boost Stage */
 	{"ADC", NULL, "Input Boost Stage"},
 	{"ADC", NULL, "PLL", check_mclk_select_pll},
-	{"Input Boost Stage", NULL, "Input PGA"},
-	{"Input Boost Stage", NULL, "MICP"},
+	{"Input Boost Stage", "PGA Mute Switch", "Input PGA"},
+	{"Input Boost Stage", "PMIC PGA Switch", "MICP"},
 
 	/* Input PGA */
 	{"Input PGA", NULL, "Mic Bias"},
-- 
2.17.0