From 0caaa1153248d4c67a20fb3abba6cef9de570424 Mon Sep 17 00:00:00 2001
From: Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>
Date: Wed, 24 Jan 2018 10:39:22 +0200
Subject: MLK-15071: ASoC: codecs: AK5558: Remove unsuported rates and channels

Support only even number of channels greater than 2 and
rates multiple of 8000.

Signed-off-by: Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 sound/soc/fsl/imx-ak5558.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'sound/soc/fsl/imx-ak5558.c')

diff --git a/sound/soc/fsl/imx-ak5558.c b/sound/soc/fsl/imx-ak5558.c
index 9d936e25d6a3..b436c8908be7 100644
--- a/sound/soc/fsl/imx-ak5558.c
+++ b/sound/soc/fsl/imx-ak5558.c
@@ -17,6 +17,7 @@
 #include <linux/of_device.h>
 #include <sound/soc.h>
 #include <sound/pcm_params.h>
+#include <sound/pcm.h>
 #include <sound/soc-dapm.h>
 
 #include "../codecs/ak5558.h"
@@ -30,6 +31,15 @@ static struct snd_soc_dapm_widget imx_ak5558_dapm_widgets[] = {
 	SND_SOC_DAPM_LINE("Line In", NULL),
 };
 
+static const u32 ak5558_rates[] = {
+	8000, 16000, 32000,
+	48000, 96000, 192000,
+};
+
+static const u32 ak5558_channels[] = {
+	1, 2, 4, 6, 8,
+};
+
 static int imx_aif_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params)
 {
@@ -68,8 +78,34 @@ static int imx_aif_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
+static int imx_aif_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static struct snd_pcm_hw_constraint_list constraint_rates;
+	static struct snd_pcm_hw_constraint_list constraint_channels;
+	int ret;
+
+	constraint_rates.list = ak5558_rates;
+	constraint_rates.count = ARRAY_SIZE(ak5558_rates);
+
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+						&constraint_rates);
+	if (ret)
+		return ret;
+
+	constraint_channels.list = ak5558_channels;
+	constraint_channels.count = ARRAY_SIZE(ak5558_channels);
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+							&constraint_channels);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static struct snd_soc_ops imx_aif_ops = {
 	.hw_params = imx_aif_hw_params,
+	.startup = imx_aif_startup,
 };
 
 static struct snd_soc_dai_link imx_ak5558_dai = {
-- 
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