[alsa-devel] [PATCH] ASoC: arizona: Add support for SNDRV_PCM_RATE_KNOT

[Charles Keepax]

The Arizona CODECs support several rates that do not have simple defines
in ALSA. This patch adds support for SNDRV_PCM_RATE_KNOT so that users
can open stream at these rates. As part of this we should always set
constraints in arizona_startup, currently we only set the constraints if
we already have a clock to limit rates to that family of sample rates.
This patch updates this to set a constraint of all rates supported by
the chip if we do not already know which family of rates to limit to.
Finally we also reduce the list of rates supported in the constraints to
only include those that are supported on current parts.

Signed-off-by: Charles Keepax <ckeepax at opensource.wolfsonmicro.com>
---
 sound/soc/codecs/arizona.c | 47 ++++++++++++++++++----------------------------
 sound/soc/codecs/cs47l24.c |  2 +-
 sound/soc/codecs/wm5102.c  |  2 +-
 sound/soc/codecs/wm5110.c  |  2 +-
 sound/soc/codecs/wm8997.c  |  2 +-
 sound/soc/codecs/wm8998.c  |  2 +-
 6 files changed, 23 insertions(+), 34 deletions(-)

diff --git a/sound/soc/codecs/arizona.c b/sound/soc/codecs/arizona.c
index 33143fe..5b16834 100644
--- a/sound/soc/codecs/arizona.c
+++ b/sound/soc/codecs/arizona.c
@@ -1398,23 +1398,10 @@ static const int arizona_48k_bclk_rates[] = {
 	24576000,
 };
 
-static const unsigned int arizona_48k_rates[] = {
-	12000,
-	24000,
-	48000,
-	96000,
-	192000,
-	384000,
-	768000,
-	4000,
-	8000,
-	16000,
-	32000,
-	64000,
-	128000,
-	256000,
-	512000,
-};
+#define ARIZONA_48K_RATES 12000, 24000, 48000, 96000, 192000, 4000, 8000, \
+			  16000, 32000
+
+static const unsigned int arizona_48k_rates[] = { ARIZONA_48K_RATES };
 
 static const struct snd_pcm_hw_constraint_list arizona_48k_constraint = {
 	.count	= ARRAY_SIZE(arizona_48k_rates),
@@ -1443,15 +1430,9 @@ static const int arizona_44k1_bclk_rates[] = {
 	22579200,
 };
 
-static const unsigned int arizona_44k1_rates[] = {
-	11025,
-	22050,
-	44100,
-	88200,
-	176400,
-	352800,
-	705600,
-};
+#define ARIZONA_44K1_RATES 11025, 22050, 44100, 88200, 176400
+
+static const unsigned int arizona_44k1_rates[] = { ARIZONA_44K1_RATES };
 
 static const struct snd_pcm_hw_constraint_list arizona_44k1_constraint = {
 	.count	= ARRAY_SIZE(arizona_44k1_rates),
@@ -1485,6 +1466,15 @@ static int arizona_sr_vals[] = {
 	512000,
 };
 
+static const unsigned int arizona_rates[] = {
+	ARIZONA_48K_RATES, ARIZONA_44K1_RATES
+};
+
+static const struct snd_pcm_hw_constraint_list arizona_constraint = {
+	.count	= ARRAY_SIZE(arizona_rates),
+	.list	= arizona_rates,
+};
+
 static int arizona_startup(struct snd_pcm_substream *substream,
 			   struct snd_soc_dai *dai)
 {
@@ -1509,9 +1499,8 @@ static int arizona_startup(struct snd_pcm_substream *substream,
 	}
 
 	if (base_rate == 0)
-		return 0;
-
-	if (base_rate % 8000)
+		constraint = &arizona_constraint;
+	else if (base_rate % 8000)
 		constraint = &arizona_44k1_constraint;
 	else
 		constraint = &arizona_48k_constraint;
diff --git a/sound/soc/codecs/cs47l24.c b/sound/soc/codecs/cs47l24.c
index b8d3cd0..576087b 100644
--- a/sound/soc/codecs/cs47l24.c
+++ b/sound/soc/codecs/cs47l24.c
@@ -923,7 +923,7 @@ static int cs47l24_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
 	}
 }
 
-#define CS47L24_RATES SNDRV_PCM_RATE_8000_192000
+#define CS47L24_RATES SNDRV_PCM_RATE_KNOT
 
 #define CS47L24_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
diff --git a/sound/soc/codecs/wm5102.c b/sound/soc/codecs/wm5102.c
index aa1e96a..a8b3e3f 100644
--- a/sound/soc/codecs/wm5102.c
+++ b/sound/soc/codecs/wm5102.c
@@ -1738,7 +1738,7 @@ static int wm5102_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
 	}
 }
 
-#define WM5102_RATES SNDRV_PCM_RATE_8000_192000
+#define WM5102_RATES SNDRV_PCM_RATE_KNOT
 
 #define WM5102_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
diff --git a/sound/soc/codecs/wm5110.c b/sound/soc/codecs/wm5110.c
index 302a8d3..83ba70f 100644
--- a/sound/soc/codecs/wm5110.c
+++ b/sound/soc/codecs/wm5110.c
@@ -2024,7 +2024,7 @@ static int wm5110_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
 	}
 }
 
-#define WM5110_RATES SNDRV_PCM_RATE_8000_192000
+#define WM5110_RATES SNDRV_PCM_RATE_KNOT
 
 #define WM5110_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
diff --git a/sound/soc/codecs/wm8997.c b/sound/soc/codecs/wm8997.c
index b4dba3a..52d766e 100644
--- a/sound/soc/codecs/wm8997.c
+++ b/sound/soc/codecs/wm8997.c
@@ -943,7 +943,7 @@ static int wm8997_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
 	}
 }
 
-#define WM8997_RATES SNDRV_PCM_RATE_8000_192000
+#define WM8997_RATES SNDRV_PCM_RATE_KNOT
 
 #define WM8997_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
diff --git a/sound/soc/codecs/wm8998.c b/sound/soc/codecs/wm8998.c
index 7719bc5..0123960 100644
--- a/sound/soc/codecs/wm8998.c
+++ b/sound/soc/codecs/wm8998.c
@@ -1170,7 +1170,7 @@ static const struct snd_soc_dapm_route wm8998_dapm_routes[] = {
 	{ "DRC1 Signal Activity", NULL, "DRC1R" },
 };
 
-#define WM8998_RATES SNDRV_PCM_RATE_8000_192000
+#define WM8998_RATES SNDRV_PCM_RATE_KNOT
 
 #define WM8998_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
-- 
2.1.4