[PATCH v2 0/9] ASoC: don't use array if single pattarn

[PATCH v2 0/9] ASoC: don't use array if single pattarn

[Kuninori Morimoto]

Hi Mark, all

I have posted this patch-set as [RFC] and v1 before.
This is v2.

v1
Link: https://lore.kernel.org/r/8733zfj5jj.wl-kuninori.morimoto.gx@renesas.com

It was too huge patch-set, thus I have separated it into 3 part.
(A)	- Update existing driver which is already using auto format
	- Add auto format support to not-yet used driver
(B)	 - Already got Reivewed-by / Acked-by
(C)	 - No yet reviewed

This is (A).

------- 8< ------- 8< ------- 8< ------- 8< ------- 8< -------

Current ASoC supports snd_soc_daifmt_parse_format() which can specify DAI
format by "dai-format" property from DT.
But strictly speaking, it is SW settings, so doesn't match to DT's policy.

Current ASoC is supporting auto format select via
snd_soc_dai_ops :: .auto_selectable_formats.
But the user is very few today.

DT doesn't need to specify the DAI format via "dai-format", if both CPU
and Codec drivers were supporting .auto_selectable_formats. It will be
automatically selected from .auto_selectable_formats.

But, I noticed that current auto format select method can't handle all cases.
For example, current .auto_selectable_formats is like below

	static u64 xxx_auto_formats[] = {
(A)		/* First Priority */
		SND_SOC_POSSIBLE_DAIFMT_I2S	|
		SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
		SND_SOC_POSSIBLE_DAIFMT_NB_NF	|
		SND_SOC_POSSIBLE_DAIFMT_NB_IF	|	(x)
		SND_SOC_POSSIBLE_DAIFMT_IB_NF	|
		SND_SOC_POSSIBLE_DAIFMT_IB_IF,		(x)

		/* Second Priority */
(B)		SND_SOC_POSSIBLE_DAIFMT_DSP_A	|	(y)
		SND_SOC_POSSIBLE_DAIFMT_DSP_B,		(y)
	};

It try to find DAI format from (A) first, and next it will use (A | B).
But it can't handle the format if some format were independent.
For example, DSP_x (y) can't use with xB_IF (x), etc.

So, I would like to update the method. New method doesn't use OR.
It try to find DAI format from (a), next it will use (b).

	static u64 xxx_auto_formats[] = {
(a)		/* First Priority */
		SND_SOC_POSSIBLE_DAIFMT_I2S	|
		SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
		SND_SOC_POSSIBLE_DAIFMT_NB_NF	|
		SND_SOC_POSSIBLE_DAIFMT_NB_IF	|
		SND_SOC_POSSIBLE_DAIFMT_IB_NF	|
		SND_SOC_POSSIBLE_DAIFMT_IB_IF,

		/* Second Priority */
(b)		SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
		SND_SOC_POSSIBLE_DAIFMT_DSP_B	|
		SND_SOC_POSSIBLE_DAIFMT_NB_NF	|
		SND_SOC_POSSIBLE_DAIFMT_IB_NF,
	};

Switch old method to new method, Current auto select user need to update
.auto_selectable_formats. Fortunately, current few users doesn't have
above limitation. update (A)(B) to (a)(b) style is possible.

	a = A
	b = A | B

I would like to update method, and add .auto_selectable_formats
support on all drivers.

One note is that auto select might not find best format on some CPU/Codec
combination. So "dai-format" is necessary anyway.

And, there haven't been any big problems on .auto_selectable_formats,
because there were few users.
But if all drivers try to use this, it cannot be denied that they may
encounter unknown problems... In such case, "dai-format" can help, though.


Kuninori Morimoto (9):
  ASoC: remove SND_SOC_POSSIBLE_xBx_xFx
  ASoC: codecs: framer-codec: don't use array if single pattarn
  ASoC: codecs: idt821034: don't use array if single pattarn
  ASoC: codecs: peb2466: don't use array if single pattarn
  ASoC: codecs: ak4619: update auto select format
  ASoC: codecs: pcm3168a: update auto select format
  ASoC: renesas: rcar: update auto select format
  ASoC: update auto format selection method
  ASoC: audio-graph-card2: recommend to use auto select DAI format

 include/sound/soc-dai.h               |  15 +-
 sound/soc/codecs/ak4613.c             |   5 -
 sound/soc/codecs/ak4619.c             |   8 +-
 sound/soc/codecs/da7213.c             |   5 -
 sound/soc/codecs/framer-codec.c       |   8 +-
 sound/soc/codecs/idt821034.c          |   9 +-
 sound/soc/codecs/pcm3168a.c           |   8 +-
 sound/soc/codecs/peb2466.c            |   9 +-
 sound/soc/generic/audio-graph-card2.c |  12 ++
 sound/soc/generic/test-component.c    |   7 -
 sound/soc/renesas/fsi.c               |   5 -
 sound/soc/renesas/rcar/core.c         |  12 +-
 sound/soc/renesas/rcar/msiof.c        |   5 -
 sound/soc/soc-core.c                  | 160 +-------------------
 sound/soc/soc-dai.c                   | 207 ++++++++++++++++++++------
 sound/soc/soc-utils.c                 |   7 -
 16 files changed, 201 insertions(+), 281 deletions(-)

-- 
2.53.0

[PATCH v2 1/9] ASoC: remove SND_SOC_POSSIBLE_xBx_xFx

[Kuninori Morimoto]

Clock provider / consumer selection is based on board, we can't select
automatically from software. Let's remove SND_SOC_POSSIBLE_xBx_xFx.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 include/sound/soc-dai.h            |  8 --------
 sound/soc/codecs/ak4613.c          |  5 -----
 sound/soc/codecs/ak4619.c          |  6 ------
 sound/soc/codecs/da7213.c          |  5 -----
 sound/soc/codecs/pcm3168a.c        |  6 ------
 sound/soc/generic/test-component.c |  7 -------
 sound/soc/renesas/fsi.c            |  5 -----
 sound/soc/renesas/rcar/core.c      |  3 ---
 sound/soc/renesas/rcar/msiof.c     |  5 -----
 sound/soc/soc-core.c               | 15 ---------------
 sound/soc/soc-utils.c              |  7 -------
 11 files changed, 72 deletions(-)

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index df010a91b3505..c40823ba54564 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -140,14 +140,6 @@ struct clk;
 #define SND_SOC_DAIFMT_BP_FC		SND_SOC_DAIFMT_CBP_CFC
 #define SND_SOC_DAIFMT_BC_FC		SND_SOC_DAIFMT_CBC_CFC
 
-/* Describes the possible PCM format */
-#define SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_SHIFT	48
-#define SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_MASK	(0xFFFFULL << SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_SHIFT)
-#define SND_SOC_POSSIBLE_DAIFMT_CBP_CFP			(0x1ULL    << SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_SHIFT)
-#define SND_SOC_POSSIBLE_DAIFMT_CBC_CFP			(0x2ULL    << SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_SHIFT)
-#define SND_SOC_POSSIBLE_DAIFMT_CBP_CFC			(0x4ULL    << SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_SHIFT)
-#define SND_SOC_POSSIBLE_DAIFMT_CBC_CFC			(0x8ULL    << SND_SOC_POSSIBLE_DAIFMT_CLOCK_PROVIDER_SHIFT)
-
 #define SND_SOC_DAIFMT_FORMAT_MASK		0x000f
 #define SND_SOC_DAIFMT_CLOCK_MASK		0x00f0
 #define SND_SOC_DAIFMT_INV_MASK			0x0f00
diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
index 3b198b9b46051..3e0696b5abf52 100644
--- a/sound/soc/codecs/ak4613.c
+++ b/sound/soc/codecs/ak4613.c
@@ -748,11 +748,6 @@ static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 	return 0;
 }
 
-/*
- * Select below from Sound Card, not Auto
- *	SND_SOC_DAIFMT_CBC_CFC
- *	SND_SOC_DAIFMT_CBP_CFP
- */
 static const u64 ak4613_dai_formats =
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_LEFT_J;
diff --git a/sound/soc/codecs/ak4619.c b/sound/soc/codecs/ak4619.c
index 755c002f0f159..192b0c3413968 100644
--- a/sound/soc/codecs/ak4619.c
+++ b/sound/soc/codecs/ak4619.c
@@ -778,12 +778,6 @@ static int ak4619_dai_startup(struct snd_pcm_substream *substream,
 }
 
 static u64 ak4619_dai_formats[] = {
-	/*
-	 * Select below from Sound Card, not here
-	 *	SND_SOC_DAIFMT_CBC_CFC
-	 *	SND_SOC_DAIFMT_CBP_CFP
-	 */
-
 	/* First Priority */
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_LEFT_J,
diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c
index 98b8858ded025..4bf91ab2553a2 100644
--- a/sound/soc/codecs/da7213.c
+++ b/sound/soc/codecs/da7213.c
@@ -1720,11 +1720,6 @@ static int da7213_set_component_pll(struct snd_soc_component *component,
 	return _da7213_set_component_pll(component, pll_id, source, fref, fout);
 }
 
-/*
- * Select below from Sound Card, not Auto
- *	SND_SOC_DAIFMT_CBC_CFC
- *	SND_SOC_DAIFMT_CBP_CFP
- */
 static const u64 da7213_dai_formats =
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
diff --git a/sound/soc/codecs/pcm3168a.c b/sound/soc/codecs/pcm3168a.c
index 4503f2f0724e6..55a7fd5f9251a 100644
--- a/sound/soc/codecs/pcm3168a.c
+++ b/sound/soc/codecs/pcm3168a.c
@@ -563,12 +563,6 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
 }
 
 static const u64 pcm3168a_dai_formats[] = {
-	/*
-	 * Select below from Sound Card, not here
-	 *	SND_SOC_DAIFMT_CBC_CFC
-	 *	SND_SOC_DAIFMT_CBP_CFP
-	 */
-
 	/*
 	 * First Priority
 	 */
diff --git a/sound/soc/generic/test-component.c b/sound/soc/generic/test-component.c
index fc40d024152e6..6f9f498c4c5c1 100644
--- a/sound/soc/generic/test-component.c
+++ b/sound/soc/generic/test-component.c
@@ -191,13 +191,6 @@ static int test_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct
 }
 
 static const u64 test_dai_formats =
-	/*
-	 * Select below from Sound Card, not auto
-	 *	SND_SOC_POSSIBLE_DAIFMT_BP_FP
-	 *	SND_SOC_POSSIBLE_DAIFMT_BC_FP
-	 *	SND_SOC_POSSIBLE_DAIFMT_BP_FC
-	 *	SND_SOC_POSSIBLE_DAIFMT_BC_FC
-	 */
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_RIGHT_J	|
 	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
diff --git a/sound/soc/renesas/fsi.c b/sound/soc/renesas/fsi.c
index 8cbd7acc26f49..1eb3e83c0616c 100644
--- a/sound/soc/renesas/fsi.c
+++ b/sound/soc/renesas/fsi.c
@@ -1694,11 +1694,6 @@ static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-/*
- * Select below from Sound Card, not auto
- *	SND_SOC_DAIFMT_CBC_CFC
- *	SND_SOC_DAIFMT_CBP_CFP
- */
 static const u64 fsi_dai_formats =
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
diff --git a/sound/soc/renesas/rcar/core.c b/sound/soc/renesas/rcar/core.c
index 9ce56cd84f46d..82fbdd550714c 100644
--- a/sound/soc/renesas/rcar/core.c
+++ b/sound/soc/renesas/rcar/core.c
@@ -1058,9 +1058,6 @@ static const u64 rsnd_soc_dai_formats[] = {
 	 * 1st Priority
 	 *
 	 * Well tested formats.
-	 * Select below from Sound Card, not auto
-	 *	SND_SOC_DAIFMT_CBC_CFC
-	 *	SND_SOC_DAIFMT_CBP_CFP
 	 */
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_RIGHT_J	|
diff --git a/sound/soc/renesas/rcar/msiof.c b/sound/soc/renesas/rcar/msiof.c
index 2671abc028cce..128543fc4fc97 100644
--- a/sound/soc/renesas/rcar/msiof.c
+++ b/sound/soc/renesas/rcar/msiof.c
@@ -363,11 +363,6 @@ static int msiof_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	return 0;
 }
 
-/*
- * Select below from Sound Card, not auto
- *	SND_SOC_DAIFMT_CBC_CFC
- *	SND_SOC_DAIFMT_CBP_CFP
- */
 static const u64 msiof_dai_formats = SND_SOC_POSSIBLE_DAIFMT_I2S	|
 				     SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
 				     SND_SOC_POSSIBLE_DAIFMT_NB_NF;
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index e96dd4a3f46c7..4aa145dc5c570 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1401,21 +1401,6 @@ static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
 		case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
 			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
 			break;
-		/*
-		 * for clock provider / consumer
-		 */
-		case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
-			break;
 		}
 	}
 
diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c
index 9cb7567e263eb..87e9c86ca4f88 100644
--- a/sound/soc/soc-utils.c
+++ b/sound/soc/soc-utils.c
@@ -183,13 +183,6 @@ static const struct snd_soc_component_driver dummy_codec = {
 			SNDRV_PCM_FMTBIT_U32_LE | \
 			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
 
-/*
- * Select these from Sound Card Manually
- *	SND_SOC_POSSIBLE_DAIFMT_CBP_CFP
- *	SND_SOC_POSSIBLE_DAIFMT_CBP_CFC
- *	SND_SOC_POSSIBLE_DAIFMT_CBC_CFP
- *	SND_SOC_POSSIBLE_DAIFMT_CBC_CFC
- */
 static const u64 dummy_dai_formats =
 	SND_SOC_POSSIBLE_DAIFMT_I2S	|
 	SND_SOC_POSSIBLE_DAIFMT_RIGHT_J	|
-- 
2.53.0

[PATCH v2 2/9] ASoC: codecs: framer-codec: don't use array if single pattarn

[Kuninori Morimoto]

Because it is confusable during debugging ASoC FW update, tidyup
auto format style not to use array if single pattern case.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/codecs/framer-codec.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/framer-codec.c b/sound/soc/codecs/framer-codec.c
index 6f57a3aeecc89..a87a78390172d 100644
--- a/sound/soc/codecs/framer-codec.c
+++ b/sound/soc/codecs/framer-codec.c
@@ -238,15 +238,13 @@ static int framer_dai_startup(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static const u64 framer_dai_formats[] = {
-	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
-};
+static const u64 framer_dai_formats = SND_SOC_POSSIBLE_DAIFMT_DSP_B;
 
 static const struct snd_soc_dai_ops framer_dai_ops = {
 	.startup	= framer_dai_startup,
 	.set_tdm_slot	= framer_dai_set_tdm_slot,
-	.auto_selectable_formats     = framer_dai_formats,
-	.num_auto_selectable_formats = ARRAY_SIZE(framer_dai_formats),
+	.auto_selectable_formats     = &framer_dai_formats,
+	.num_auto_selectable_formats = 1,
 };
 
 static struct snd_soc_dai_driver framer_dai_driver = {
-- 
2.53.0

Re: [PATCH v2 2/9] ASoC: codecs: framer-codec: don't use array if single pattarn

[Herve Codina]

Hi Kuninori

On Mon, 8 Jun 2026 00:57:53 +0000
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> wrote:

Still the typo in commit title
s/pattarn/pattern/

Best regards,
Hervé

> Because it is confusable during debugging ASoC FW update, tidyup
> auto format style not to use array if single pattern case.
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
>  sound/soc/codecs/framer-codec.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/sound/soc/codecs/framer-codec.c b/sound/soc/codecs/framer-codec.c
> index 6f57a3aeecc89..a87a78390172d 100644
> --- a/sound/soc/codecs/framer-codec.c
> +++ b/sound/soc/codecs/framer-codec.c
> @@ -238,15 +238,13 @@ static int framer_dai_startup(struct snd_pcm_substream *substream,
>  	return 0;
>  }
>  
> -static const u64 framer_dai_formats[] = {
> -	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
> -};
> +static const u64 framer_dai_formats = SND_SOC_POSSIBLE_DAIFMT_DSP_B;
>  
>  static const struct snd_soc_dai_ops framer_dai_ops = {
>  	.startup	= framer_dai_startup,
>  	.set_tdm_slot	= framer_dai_set_tdm_slot,
> -	.auto_selectable_formats     = framer_dai_formats,
> -	.num_auto_selectable_formats = ARRAY_SIZE(framer_dai_formats),
> +	.auto_selectable_formats     = &framer_dai_formats,
> +	.num_auto_selectable_formats = 1,
>  };
>  
>  static struct snd_soc_dai_driver framer_dai_driver = {



-- 
Hervé Codina, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH v2 2/9] ASoC: codecs: framer-codec: don't use array if single pattarn

[Kuninori Morimoto]

Hi Herve

> Still the typo in commit title
> s/pattarn/pattern/

Oops ??
I have updated it, but...

Thank you for pointing it. will post v3


Thank you for your help !!

Best regards
---
Kuninori Morimoto

[PATCH v2 3/9] ASoC: codecs: idt821034: don't use array if single pattarn

[Kuninori Morimoto]

Because it is confusable during debugging ASoC FW update, tidyup
auto format style not to use array if single pattern case.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/codecs/idt821034.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/idt821034.c b/sound/soc/codecs/idt821034.c
index 39bafefa6a186..084090ccef77a 100644
--- a/sound/soc/codecs/idt821034.c
+++ b/sound/soc/codecs/idt821034.c
@@ -860,18 +860,17 @@ static int idt821034_dai_startup(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static const u64 idt821034_dai_formats[] = {
+static const u64 idt821034_dai_formats =
 	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
-	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
-};
+	SND_SOC_POSSIBLE_DAIFMT_DSP_B;
 
 static const struct snd_soc_dai_ops idt821034_dai_ops = {
 	.startup      = idt821034_dai_startup,
 	.hw_params    = idt821034_dai_hw_params,
 	.set_tdm_slot = idt821034_dai_set_tdm_slot,
 	.set_fmt      = idt821034_dai_set_fmt,
-	.auto_selectable_formats     = idt821034_dai_formats,
-	.num_auto_selectable_formats = ARRAY_SIZE(idt821034_dai_formats),
+	.auto_selectable_formats     = &idt821034_dai_formats,
+	.num_auto_selectable_formats = 1,
 };
 
 static struct snd_soc_dai_driver idt821034_dai_driver = {
-- 
2.53.0

Re: [PATCH v2 3/9] ASoC: codecs: idt821034: don't use array if single pattarn

[Herve Codina]

Hi Kuninori,

On Mon, 8 Jun 2026 00:57:57 +0000
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> wrote:

Still the typo in commit title
s/pattarn/pattern/

Best regards,
Hervé

> Because it is confusable during debugging ASoC FW update, tidyup
> auto format style not to use array if single pattern case.
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
>  sound/soc/codecs/idt821034.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/sound/soc/codecs/idt821034.c b/sound/soc/codecs/idt821034.c
> index 39bafefa6a186..084090ccef77a 100644
> --- a/sound/soc/codecs/idt821034.c
> +++ b/sound/soc/codecs/idt821034.c
> @@ -860,18 +860,17 @@ static int idt821034_dai_startup(struct snd_pcm_substream *substream,
>  	return 0;
>  }
>  
> -static const u64 idt821034_dai_formats[] = {
> +static const u64 idt821034_dai_formats =
>  	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
> -	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
> -};
> +	SND_SOC_POSSIBLE_DAIFMT_DSP_B;
>  
>  static const struct snd_soc_dai_ops idt821034_dai_ops = {
>  	.startup      = idt821034_dai_startup,
>  	.hw_params    = idt821034_dai_hw_params,
>  	.set_tdm_slot = idt821034_dai_set_tdm_slot,
>  	.set_fmt      = idt821034_dai_set_fmt,
> -	.auto_selectable_formats     = idt821034_dai_formats,
> -	.num_auto_selectable_formats = ARRAY_SIZE(idt821034_dai_formats),
> +	.auto_selectable_formats     = &idt821034_dai_formats,
> +	.num_auto_selectable_formats = 1,
>  };
>  
>  static struct snd_soc_dai_driver idt821034_dai_driver = {

[PATCH v2 4/9] ASoC: codecs: peb2466: don't use array if single pattarn

[Kuninori Morimoto]

Because it is confusable during debugging ASoC FW update, tidyup
auto format style not to use array if single pattern case.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/codecs/peb2466.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/peb2466.c b/sound/soc/codecs/peb2466.c
index 2d5163c15d0d1..2d71d204d8fa2 100644
--- a/sound/soc/codecs/peb2466.c
+++ b/sound/soc/codecs/peb2466.c
@@ -817,18 +817,17 @@ static int peb2466_dai_startup(struct snd_pcm_substream *substream,
 					  &peb2466_sample_bits_constr);
 }
 
-static const u64 peb2466_dai_formats[] = {
+static const u64 peb2466_dai_formats =
 	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
-	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
-};
+	SND_SOC_POSSIBLE_DAIFMT_DSP_B;
 
 static const struct snd_soc_dai_ops peb2466_dai_ops = {
 	.startup = peb2466_dai_startup,
 	.hw_params = peb2466_dai_hw_params,
 	.set_tdm_slot = peb2466_dai_set_tdm_slot,
 	.set_fmt = peb2466_dai_set_fmt,
-	.auto_selectable_formats     = peb2466_dai_formats,
-	.num_auto_selectable_formats = ARRAY_SIZE(peb2466_dai_formats),
+	.auto_selectable_formats     = &peb2466_dai_formats,
+	.num_auto_selectable_formats = 1,
 };
 
 static struct snd_soc_dai_driver peb2466_dai_driver = {
-- 
2.53.0

Re: [PATCH v2 4/9] ASoC: codecs: peb2466: don't use array if single pattarn

[Herve Codina]

Hi Kuninori,

On Mon, 8 Jun 2026 00:58:02 +0000
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> wrote:

Still the typo in commit title
s/pattarn/pattern/

Best regards,
Hervé

> Because it is confusable during debugging ASoC FW update, tidyup
> auto format style not to use array if single pattern case.
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
>  sound/soc/codecs/peb2466.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/sound/soc/codecs/peb2466.c b/sound/soc/codecs/peb2466.c
> index 2d5163c15d0d1..2d71d204d8fa2 100644
> --- a/sound/soc/codecs/peb2466.c
> +++ b/sound/soc/codecs/peb2466.c
> @@ -817,18 +817,17 @@ static int peb2466_dai_startup(struct snd_pcm_substream *substream,
>  					  &peb2466_sample_bits_constr);
>  }
>  
> -static const u64 peb2466_dai_formats[] = {
> +static const u64 peb2466_dai_formats =
>  	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
> -	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
> -};
> +	SND_SOC_POSSIBLE_DAIFMT_DSP_B;
>  
>  static const struct snd_soc_dai_ops peb2466_dai_ops = {
>  	.startup = peb2466_dai_startup,
>  	.hw_params = peb2466_dai_hw_params,
>  	.set_tdm_slot = peb2466_dai_set_tdm_slot,
>  	.set_fmt = peb2466_dai_set_fmt,
> -	.auto_selectable_formats     = peb2466_dai_formats,
> -	.num_auto_selectable_formats = ARRAY_SIZE(peb2466_dai_formats),
> +	.auto_selectable_formats     = &peb2466_dai_formats,
> +	.num_auto_selectable_formats = 1,
>  };
>  
>  static struct snd_soc_dai_driver peb2466_dai_driver = {

[PATCH v2 5/9] ASoC: codecs: ak4619: update auto select format

[Kuninori Morimoto]

Current auto select format start with the highest priority format and
gradually add lower priority formats one by one, and search matched
format. Like A+X -> A+B+X -> A+B+C+X+Y... (a)

But in this method, we can't handle format if HW has some kind of
patterns, like A+X or B+Y etc (b).

Current drivers are using (a) style, this patch switch to use (b) style.
This is needed before update auto select format method.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/codecs/ak4619.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/ak4619.c b/sound/soc/codecs/ak4619.c
index 192b0c3413968..d9c9f6b200284 100644
--- a/sound/soc/codecs/ak4619.c
+++ b/sound/soc/codecs/ak4619.c
@@ -783,6 +783,8 @@ static u64 ak4619_dai_formats[] = {
 	SND_SOC_POSSIBLE_DAIFMT_LEFT_J,
 
 	/* Second Priority */
+	SND_SOC_POSSIBLE_DAIFMT_I2S	|
+	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
 	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
 	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
 };
-- 
2.53.0

[PATCH v2 6/9] ASoC: codecs: pcm3168a: update auto select format

[Kuninori Morimoto]

Current auto select format start with the highest priority format and
gradually add lower priority formats one by one, and search matched
format. Like A+X -> A+B+X -> A+B+C+X+Y... (a)

But in this method, we can't handle format if HW has some kind of
patterns, like A+X or B+Y etc (b).

Current drivers are using (a) style, this patch switch to use (b) style.
This is needed before update auto select format method.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/codecs/pcm3168a.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/pcm3168a.c b/sound/soc/codecs/pcm3168a.c
index 55a7fd5f9251a..cb6a6f08f2f80 100644
--- a/sound/soc/codecs/pcm3168a.c
+++ b/sound/soc/codecs/pcm3168a.c
@@ -575,6 +575,8 @@ static const u64 pcm3168a_dai_formats[] = {
 	 * see
 	 *	pcm3168a_hw_params()
 	 */
+	SND_SOC_POSSIBLE_DAIFMT_I2S	|
+	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
 	SND_SOC_POSSIBLE_DAIFMT_RIGHT_J	|
 	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
 	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
-- 
2.53.0

[PATCH v2 7/9] ASoC: renesas: rcar: update auto select format

[Kuninori Morimoto]

Current auto select format start with the highest priority format and
gradually add lower priority formats one by one, and search matched
format. Like A+X -> A+B+X -> A+B+C+X+Y... (a)

But in this method, we can't handle format if HW has some kind of
patterns, like A+X or B+Y etc (b).

Current drivers are using (a) style, this patch switch to use (b) style.
This is needed before update auto select format method.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/renesas/rcar/core.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/soc/renesas/rcar/core.c b/sound/soc/renesas/rcar/core.c
index 82fbdd550714c..b7954746e9533 100644
--- a/sound/soc/renesas/rcar/core.c
+++ b/sound/soc/renesas/rcar/core.c
@@ -1071,8 +1071,15 @@ static const u64 rsnd_soc_dai_formats[] = {
 	 *
 	 * Supported, but not well tested
 	 */
+	SND_SOC_POSSIBLE_DAIFMT_I2S	|
+	SND_SOC_POSSIBLE_DAIFMT_RIGHT_J	|
+	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
 	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
-	SND_SOC_POSSIBLE_DAIFMT_DSP_B,
+	SND_SOC_POSSIBLE_DAIFMT_DSP_B	|
+	SND_SOC_POSSIBLE_DAIFMT_NB_NF	|
+	SND_SOC_POSSIBLE_DAIFMT_NB_IF	|
+	SND_SOC_POSSIBLE_DAIFMT_IB_NF	|
+	SND_SOC_POSSIBLE_DAIFMT_IB_IF,
 };
 
 static void rsnd_parse_tdm_split_mode(struct rsnd_priv *priv,
-- 
2.53.0

[PATCH v2 8/9] ASoC: update auto format selection method

[Kuninori Morimoto]

Current DAI supports auto format selection. It allow to have array like
below.

(X)	static u64 xxx_auto_formats[] = {
(A)		/* First Priority */
		SND_SOC_POSSIBLE_DAIFMT_I2S	|
		SND_SOC_POSSIBLE_DAIFMT_LEFT_J,

		/* Second Priority */
(B)		SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
		SND_SOC_POSSIBLE_DAIFMT_DSP_B,
	};

It try to find available format from I2S/LEFT_J first (A).
Then, try to find from I2S/LEFT_J/DSP_A/DSP_B if couldn't find (A)+(B).
(OR:ed)

In this method, it can't handle if there is format combination.
For example, some driver has pattern.

Pattern1
	I2S/RIFHT_J/LEFT_J (FORMAT) and NB_NF/IB_IF/IB_NF/NB_IF (INV)_
Pattern2
	DSP_A/DSP_B        (FORMAT) and NB_NF/      IB_NF

Because it will try to OR Pattern1 and Pattern2, un-supported
pattern might be selected.

This patch update method not to use OR, and assumes full format array.
Above sample (X) need to be

	static u64 xxx_auto_formats[] = {
		/* First Priority */
		SND_SOC_POSSIBLE_DAIFMT_I2S	|
		SND_SOC_POSSIBLE_DAIFMT_LEFT_J,

		/* Second Priority */
		SND_SOC_POSSIBLE_DAIFMT_I2S	|
		SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
		SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
		SND_SOC_POSSIBLE_DAIFMT_DSP_B,
	};

Note: It doesn't support Multi CPU/Codec for now

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 include/sound/soc-dai.h |   7 +-
 sound/soc/soc-core.c    | 145 +---------------------------
 sound/soc/soc-dai.c     | 207 +++++++++++++++++++++++++++++++---------
 3 files changed, 166 insertions(+), 193 deletions(-)

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index c40823ba54564..ba3ae56c6b062 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -81,10 +81,10 @@ struct clk;
 /*
  * define GATED -> CONT. GATED will be selected if both are selected.
  * see
- *	snd_soc_runtime_get_dai_fmt()
+ *	soc_dai_convert_possiblefmt_to_daifmt()
  */
 #define SND_SOC_POSSIBLE_DAIFMT_CLOCK_SHIFT	16
-#define SND_SOC_POSSIBLE_DAIFMT_CLOCK_MASK	(0xFFFF	<< SND_SOC_POSSIBLE_DAIFMT_CLOCK_SHIFT)
+#define SND_SOC_POSSIBLE_DAIFMT_CLOCK_MASK	(0xFFFFULL << SND_SOC_POSSIBLE_DAIFMT_CLOCK_SHIFT)
 #define SND_SOC_POSSIBLE_DAIFMT_GATED		(0x1ULL	<< SND_SOC_POSSIBLE_DAIFMT_CLOCK_SHIFT)
 #define SND_SOC_POSSIBLE_DAIFMT_CONT		(0x2ULL	<< SND_SOC_POSSIBLE_DAIFMT_CLOCK_SHIFT)
 
@@ -184,8 +184,7 @@ int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
 void snd_soc_dai_set_bclk_clk(struct snd_soc_dai *dai, struct clk *bclk);
 
 /* Digital Audio interface formatting */
-int snd_soc_dai_get_fmt_max_priority(const struct snd_soc_pcm_runtime *rtd);
-u64 snd_soc_dai_get_fmt(const struct snd_soc_dai *dai, int priority);
+unsigned int snd_soc_dai_auto_select_format(const struct snd_soc_pcm_runtime *rtd);
 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 
 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 4aa145dc5c570..1e107ff905528 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1284,148 +1284,6 @@ int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
 }
 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
 
-static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
-{
-	struct snd_soc_dai_link *dai_link = rtd->dai_link;
-	struct snd_soc_dai *dai, *not_used;
-	u64 pos, possible_fmt;
-	unsigned int mask = 0, dai_fmt = 0;
-	int i, j, priority, pri, until;
-
-	/*
-	 * Get selectable format from each DAIs.
-	 *
-	 ****************************
-	 *            NOTE
-	 * Using .auto_selectable_formats is not mandatory,
-	 * we can select format manually from Sound Card.
-	 * When use it, driver should list well tested format only.
-	 ****************************
-	 *
-	 * ex)
-	 *	auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
-	 *		 (A)	 (B)	 (C)
-	 *	DAI0_: { 0x000F, 0x00F0, 0x0F00 };
-	 *	DAI1 : { 0xF000, 0x0F00 };
-	 *		 (X)	 (Y)
-	 *
-	 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
-	 * Here is dev_dbg() message and comments
-	 *
-	 * priority = 1
-	 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
-	 * DAI1: (pri, fmt) = (0, 0000000000000000) //               Necessary Waste
-	 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
-	 * DAI1: (pri, fmt) = (1, 000000000000F000) //           (X)
-	 * priority = 2
-	 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
-	 * DAI1: (pri, fmt) = (1, 000000000000F000) //           (X)
-	 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
-	 * DAI1: (pri, fmt) = (2, 000000000000FF00) //           (X) + (Y)
-	 * priority = 3
-	 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
-	 * DAI1: (pri, fmt) = (2, 000000000000FF00) //           (X) + (Y)
-	 * found auto selected format: 0000000000000F00
-	 */
-	until = snd_soc_dai_get_fmt_max_priority(rtd);
-	for (priority = 1; priority <= until; priority++) {
-		for_each_rtd_dais(rtd, j, not_used) {
-
-			possible_fmt = ULLONG_MAX;
-			for_each_rtd_dais(rtd, i, dai) {
-				u64 fmt = 0;
-
-				pri = (j >= i) ? priority : priority - 1;
-				fmt = snd_soc_dai_get_fmt(dai, pri);
-				possible_fmt &= fmt;
-			}
-			if (possible_fmt)
-				goto found;
-		}
-	}
-	/* Not Found */
-	return;
-found:
-	/*
-	 * convert POSSIBLE_DAIFMT to DAIFMT
-	 *
-	 * Some basic/default settings on each is defined as 0.
-	 * see
-	 *	SND_SOC_DAIFMT_NB_NF
-	 *	SND_SOC_DAIFMT_GATED
-	 *
-	 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
-	 * these value, and will be overwrite to auto selected value.
-	 *
-	 * To avoid such issue, loop from 63 to 0 here.
-	 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
-	 * Basic/Default settings of each part and above are defined
-	 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
-	 */
-	for (i = 63; i >= 0; i--) {
-		pos = 1ULL << i;
-		switch (possible_fmt & pos) {
-		/*
-		 * for format
-		 */
-		case SND_SOC_POSSIBLE_DAIFMT_I2S:
-		case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
-		case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
-		case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
-		case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
-		case SND_SOC_POSSIBLE_DAIFMT_AC97:
-		case SND_SOC_POSSIBLE_DAIFMT_PDM:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
-			break;
-		/*
-		 * for clock
-		 */
-		case SND_SOC_POSSIBLE_DAIFMT_CONT:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_GATED:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
-			break;
-		/*
-		 * for clock invert
-		 */
-		case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
-			break;
-		case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
-			dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
-			break;
-		}
-	}
-
-	/*
-	 * Some driver might have very complex limitation.
-	 * In such case, user want to auto-select non-limitation part,
-	 * and want to manually specify complex part.
-	 *
-	 * Or for example, if both CPU and Codec can be clock provider,
-	 * but because of its quality, user want to specify it manually.
-	 *
-	 * Use manually specified settings if sound card did.
-	 */
-	if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
-		mask |= SND_SOC_DAIFMT_FORMAT_MASK;
-	if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
-		mask |= SND_SOC_DAIFMT_CLOCK_MASK;
-	if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
-		mask |= SND_SOC_DAIFMT_INV_MASK;
-	if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
-		mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
-
-	dai_link->dai_fmt |= (dai_fmt & mask);
-}
-
 /**
  * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
  * @rtd: The runtime for which the DAI link format should be changed
@@ -1504,8 +1362,7 @@ static int soc_init_pcm_runtime(struct snd_soc_card *card,
 	if (ret < 0)
 		return ret;
 
-	snd_soc_runtime_get_dai_fmt(rtd);
-	ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
+	ret = snd_soc_runtime_set_dai_fmt(rtd, snd_soc_dai_auto_select_format(rtd));
 	if (ret)
 		goto err;
 
diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c
index 1719ddcefa4b0..b098d1100b4bb 100644
--- a/sound/soc/soc-dai.c
+++ b/sound/soc/soc-dai.c
@@ -138,68 +138,185 @@ void snd_soc_dai_set_bclk_clk(struct snd_soc_dai *dai, struct clk *bclk)
 }
 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_clk);
 
-int snd_soc_dai_get_fmt_max_priority(const struct snd_soc_pcm_runtime *rtd)
+static int soc_dai_fmt_match_cnt(u64 fmt)
+{
+	int cnt = 0;
+
+	if (fmt & SND_SOC_POSSIBLE_DAIFMT_FORMAT_MASK)
+		cnt++;
+	if (fmt & SND_SOC_POSSIBLE_DAIFMT_CLOCK_MASK)
+		cnt++;
+	if (fmt & SND_SOC_POSSIBLE_DAIFMT_INV_MASK)
+		cnt++;
+
+	return cnt;
+}
+
+static void soc_dai_auto_select_format(u64 fmt, const struct snd_soc_pcm_runtime *rtd,
+				      int idx, u64 *best_fmt)
 {
 	struct snd_soc_dai *dai;
-	int i, max = 0;
+	const struct snd_soc_dai_ops *ops;
+	int max_idx = rtd->dai_link->num_cpus + rtd->dai_link->num_codecs;
+	u64 available_fmt;
 
 	/*
-	 * return max num if *ALL* DAIs have .auto_selectable_formats
+	 * NOTE
+	 * It doesn't support Multi CPU/Codec for now
 	 */
-	for_each_rtd_dais(rtd, i, dai) {
-		if (dai->driver->ops &&
-		    dai->driver->ops->num_auto_selectable_formats)
-			max = max(max, dai->driver->ops->num_auto_selectable_formats);
-		else
-			return 0;
-	}
+	if (rtd->dai_link->num_cpus	!= 1 ||
+	    rtd->dai_link->num_codecs	!= 1)
+		return;
 
-	return max;
-}
+	if (idx >= max_idx)
+		return;
 
-/**
- * snd_soc_dai_get_fmt - get supported audio format.
- * @dai: DAI
- * @priority: priority level of supported audio format.
- *
- * This should return only formats implemented with high
- * quality by the DAI so that the core can configure a
- * format which will work well with other devices.
- * For example devices which don't support both edges of the
- * LRCLK signal in I2S style formats should only list DSP
- * modes.  This will mean that sometimes fewer formats
- * are reported here than are supported by set_fmt().
- */
-u64 snd_soc_dai_get_fmt(const struct snd_soc_dai *dai, int priority)
-{
-	const struct snd_soc_dai_ops *ops = dai->driver->ops;
-	u64 fmt = 0;
-	int i, max = 0, until = priority;
+	dai = rtd->dais[idx];
+	ops = dai->driver->ops;
+
+	/* zero chance of auto select format */
+	if (!ops || !ops->num_auto_selectable_formats)
+		return;
 
 	/*
-	 * Collect auto_selectable_formats until priority
+	 ****************************
+	 *            NOTE
+	 ****************************
+	 * Using .auto_selectable_formats is not mandatory,
+	 * It try to find best formats as much as possible, but automatically selecting the
+	 * perfect format is impossible. So you can select full or missing format manually
+	 * from Sound Card.
 	 *
 	 * ex)
-	 *	auto_selectable_formats[] = { A, B, C };
-	 *	(A, B, C = SND_SOC_POSSIBLE_DAIFMT_xxx)
+	 * CPU					Codec
+	 * (A)[0] I2S/LEFT_J : IB_NF/IB_IF	(X)[0] I2S/DSP_A: NB_NF : GATED
+	 * (B)[1] DSP_A/DSP_B: NB_NF/IB_NF	(Y)[1] LEFT_J:    NB_NF : GATED
+	 * (C)[2] ...
 	 *
-	 * priority = 1 :	A
-	 * priority = 2 :	A | B
-	 * priority = 3 :	A | B | C
-	 * priority = 4 :	A | B | C
+	 * 1. (A) -> (X) : I2S		:update best format
+	 * 2. (A) -> (Y) : LEFT_J
+	 * 3. (B) -> (X) : DSP_A/NB_NF	:update best format
+	 * 4. (B) -> (Y) : NB_NF
+	 * 5. (C) -> (X) ...
+	 * 6. (C) -> (Y) ...
 	 * ...
+	 *
+	 * In above case GATED will not be selected
 	 */
-	if (ops)
-		max = ops->num_auto_selectable_formats;
 
-	if (max < until)
-		until = max;
+	/* find best formats */
+	for (int i = 0; i < ops->num_auto_selectable_formats; i++) {
+		available_fmt = fmt & ops->auto_selectable_formats[i];
+
+		/* In case of last DAI */
+		if (idx + 1 >= max_idx) {
+			int cnt1 = soc_dai_fmt_match_cnt(*best_fmt);
+			int cnt2 = soc_dai_fmt_match_cnt(available_fmt);
+
+			if (cnt1 < cnt2)
+				*best_fmt = available_fmt;
+		}
+		/* parse with next DAI */
+		else {
+			soc_dai_auto_select_format(available_fmt, rtd, idx + 1, best_fmt);
+		}
+	}
+}
+
+static unsigned int soc_dai_convert_possiblefmt_to_daifmt(u64 possible_fmt, unsigned int configured_fmt)
+{
+	unsigned int fmt = 0;
+	unsigned int mask = 0;
+
+	/*
+	 * convert POSSIBLE_DAIFMT to DAIFMT
+	 *
+	 * Some basic/default settings on each is defined as 0.
+	 * see
+	 *	SND_SOC_DAIFMT_NB_NF
+	 *	SND_SOC_DAIFMT_GATED
+	 *
+	 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
+	 * these value, and will be overwrite to auto selected value.
+	 *
+	 * To avoid such issue, loop from 63 to 0 here.
+	 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
+	 * Basic/Default settings of each part and above are defined
+	 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
+	 */
+	for (int i = 63; i >= 0; i--) {
+		u64 pos = 1ULL << i;
+
+		switch (possible_fmt & pos) {
+		/*
+		 * for format
+		 */
+		case SND_SOC_POSSIBLE_DAIFMT_I2S:
+		case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
+		case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
+		case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
+		case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
+		case SND_SOC_POSSIBLE_DAIFMT_AC97:
+		case SND_SOC_POSSIBLE_DAIFMT_PDM:
+			fmt = (fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
+			break;
+		/*
+		 * for clock
+		 */
+		case SND_SOC_POSSIBLE_DAIFMT_CONT:
+			fmt = (fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
+			break;
+		case SND_SOC_POSSIBLE_DAIFMT_GATED:
+			fmt = (fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
+			break;
+		/*
+		 * for clock invert
+		 */
+		case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
+			fmt = (fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
+			break;
+		case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
+			fmt = (fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
+			break;
+		case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
+			fmt = (fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
+			break;
+		case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
+			fmt = (fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
+			break;
+		}
+	}
+
+	/*
+	 * Some driver might have very complex limitation.
+	 * In such case, user want to auto-select non-limitation part,
+	 * and want to manually specify complex part.
+	 *
+	 * Or for example, if both CPU and Codec can be clock provider,
+	 * but because of its quality, user want to specify it manually.
+	 *
+	 * Ignore already configured format if exist
+	 */
+	if (!(configured_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
+		mask |= SND_SOC_DAIFMT_FORMAT_MASK;
+	if (!(configured_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
+		mask |= SND_SOC_DAIFMT_CLOCK_MASK;
+	if (!(configured_fmt & SND_SOC_DAIFMT_INV_MASK))
+		mask |= SND_SOC_DAIFMT_INV_MASK;
+	if (!(configured_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
+		mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
+
+	return configured_fmt | (fmt & mask);
+}
+
+unsigned int snd_soc_dai_auto_select_format(const struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_dai_link *dai_link = rtd->dai_link;
+	u64 possible_fmt = 0;
 
-	if (ops && ops->auto_selectable_formats)
-		for (i = 0; i < until; i++)
-			fmt |= ops->auto_selectable_formats[i];
+	soc_dai_auto_select_format(~0, rtd, 0, &possible_fmt);
 
-	return fmt;
+	return soc_dai_convert_possiblefmt_to_daifmt(possible_fmt, dai_link->dai_fmt);
 }
 
 /**
-- 
2.53.0

[PATCH v2 9/9] ASoC: audio-graph-card2: recommend to use auto select DAI format

[Kuninori Morimoto]

"Simple Audio Card", "Audio Graph Card", "Audio Graph Card2" are
possible to set DAI format via DT.

OTOH, ASoC is supporting .auto_selectable_formats to select DAI
format automatically. Let's recommend to use it on "Audio Graph Card2".
One note is that it keeps supporting DAI format setting via DT.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/generic/audio-graph-card2.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/soc/generic/audio-graph-card2.c b/sound/soc/generic/audio-graph-card2.c
index 0202ed0ee78e8..6894bb936cfd2 100644
--- a/sound/soc/generic/audio-graph-card2.c
+++ b/sound/soc/generic/audio-graph-card2.c
@@ -778,6 +778,18 @@ static void graph_link_init(struct simple_util_priv *priv,
 	graph_parse_daifmt(ports_cpu,	&daifmt);
 	graph_parse_daifmt(ports_codec,	&daifmt);
 	graph_parse_daifmt(lnk,		&daifmt);
+	if (daifmt) {
+		struct device *dev = simple_priv_to_dev(priv);
+
+		/*
+		 * Recommend to use Auto Select by using .auto_selectable_formats.
+		 * linux/sound/soc/renesas/rcar/core.c can be good sample for it.
+		 *
+		 * One note is that Audio Graph Card2 still keeps compatible to set
+		 * DAI format via DT.
+		 */
+		dev_warn_once(dev, "use .auto_selectable_formats on each corresponding CPU/Codec driver");
+	}
 
 	graph_util_parse_link_direction(lnk,		&playback_only, &capture_only);
 	graph_util_parse_link_direction(ports_cpu,	&playback_only, &capture_only);
-- 
2.53.0