diff mbox series

[1/6] ASoC: es8328: Enabling support for 12Mhz sysclk

Message ID 20230523213825.120077-2-macroalpha82@gmail.com
State New
Headers show
Series [1/6] ASoC: es8328: Enabling support for 12Mhz sysclk | expand

Commit Message

Chris Morgan May 23, 2023, 9:38 p.m. UTC 
From: Chris Morgan <macromorgan@hotmail.com>

Enable support for 12Mhz sysclk on es8328. This sysclk value is used on
the Indiedroid Nova rk3588s based single board computer.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
---
 sound/soc/codecs/es8328.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

Comments

Mark Brown May 24, 2023, 11:57 a.m. UTC | #1 
On Tue, May 23, 2023 at 04:38:20PM -0500, Chris Morgan wrote:

> +static unsigned int ratios_12000[] = {
> +	8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000,
> +	48000, 88235, 96000,
> +};
> +
> +static struct snd_pcm_hw_constraint_list constraints_12000 = {
> +	.count = ARRAY_SIZE(ratios_12000),
> +	.list = ratios_12000,
> +};

...

> +	case 12000000:
> +		es8328->sysclk_constraints = &constraints_12000;
> +		es8328->mclk_ratios = ratios_12000;

The other constraints have separate rates and ratios, with wildly
different values between the two - the ratio (I'm guessing a clock
divider) being written to a 5 bit field which obviously can't contain
the actual sample rate.
Chris Morgan May 24, 2023, 4:12 p.m. UTC | #2 
On Wed, May 24, 2023 at 12:57:02PM +0100, Mark Brown wrote:
> On Tue, May 23, 2023 at 04:38:20PM -0500, Chris Morgan wrote:
> 
> > +static unsigned int ratios_12000[] = {
> > +	8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000,
> > +	48000, 88235, 96000,
> > +};
> > +
> > +static struct snd_pcm_hw_constraint_list constraints_12000 = {
> > +	.count = ARRAY_SIZE(ratios_12000),
> > +	.list = ratios_12000,
> > +};
> 
> ...
> 
> > +	case 12000000:
> > +		es8328->sysclk_constraints = &constraints_12000;
> > +		es8328->mclk_ratios = ratios_12000;
> 
> The other constraints have separate rates and ratios, with wildly
> different values between the two - the ratio (I'm guessing a clock
> divider) being written to a 5 bit field which obviously can't contain
> the actual sample rate.

A bit over my head here, I saw this patch from the Rockchip BSP kernel
branch and tested it on my mainline kernel. Long story short the clock
for the mclk is 12000000. I see that there are similar issues for the
ES8316 on the Rock 5B, so I will probably just wait for a proper fix
there and then implement something similar here.

Thank you.
Mark Brown May 24, 2023, 4:44 p.m. UTC | #3 
On Wed, May 24, 2023 at 11:12:49AM -0500, Chris Morgan wrote:
> On Wed, May 24, 2023 at 12:57:02PM +0100, Mark Brown wrote:

> > The other constraints have separate rates and ratios, with wildly
> > different values between the two - the ratio (I'm guessing a clock
> > divider) being written to a 5 bit field which obviously can't contain
> > the actual sample rate.

> A bit over my head here, I saw this patch from the Rockchip BSP kernel
> branch and tested it on my mainline kernel. Long story short the clock
> for the mclk is 12000000. I see that there are similar issues for the
> ES8316 on the Rock 5B, so I will probably just wait for a proper fix
> there and then implement something similar here.

It sounded from the rest of the series like you don't actually want to
run at 12MHz anyway, you want a change which deconfigures the sysclk
when the card is idle - that'd allow it to be reconfigured as needed to
support the widest possible set of rates.  That'd be work in the generic
cards.
diff mbox series

Patch

diff --git a/sound/soc/codecs/es8328.c b/sound/soc/codecs/es8328.c
index 160adc706cc6..3918be5fc3f1 100644
--- a/sound/soc/codecs/es8328.c
+++ b/sound/soc/codecs/es8328.c
@@ -36,6 +36,16 @@  static const struct snd_pcm_hw_constraint_list constraints_12288 = {
 	.list	= rates_12288,
 };
 
+static unsigned int ratios_12000[] = {
+	8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000,
+	48000, 88235, 96000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_12000 = {
+	.count = ARRAY_SIZE(ratios_12000),
+	.list = ratios_12000,
+};
+
 static const unsigned int rates_11289[] = {
 	8018, 11025, 22050, 44100, 88200,
 };
@@ -577,6 +587,13 @@  static int es8328_set_sysclk(struct snd_soc_dai *codec_dai,
 		es8328->sysclk_constraints = &constraints_12288;
 		es8328->mclk_ratios = ratios_12288;
 		break;
+	case 24000000:
+		mclkdiv2 = 1;
+		fallthrough;
+	case 12000000:
+		es8328->sysclk_constraints = &constraints_12000;
+		es8328->mclk_ratios = ratios_12000;
+		break;
 	default:
 		return -EINVAL;
 	}