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From e28e3e0d01c0fcb628e841977b51c45189b43f47 Mon Sep 17 00:00:00 2001
From: Viorel Suman <viorel.suman@nxp.com>
Date: Thu, 8 Mar 2018 14:37:30 +0200
Subject: [PATCH] MLK-17580: ASoC: fsl: dsd: Add DSD utilities helper
Add DSD utilities helper.
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Reviewed-by: Shengjiu Wang <shengjiu.wang@nxp.com
---
sound/soc/fsl/fsl_dsd.h | 59 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
create mode 100644 sound/soc/fsl/fsl_dsd.h
--- /dev/null
+++ b/sound/soc/fsl/fsl_dsd.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2018 NXP
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __FSL_DSD_H
+#define __FSL_DSD_H
+
+#include <linux/pinctrl/consumer.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+static bool fsl_is_dsd(struct snd_pcm_hw_params *params)
+{
+ snd_pcm_format_t format = params_format(params);
+
+ switch (format) {
+ case SNDRV_PCM_FORMAT_DSD_U8:
+ case SNDRV_PCM_FORMAT_DSD_U16_LE:
+ case SNDRV_PCM_FORMAT_DSD_U16_BE:
+ case SNDRV_PCM_FORMAT_DSD_U32_LE:
+ case SNDRV_PCM_FORMAT_DSD_U32_BE:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static struct pinctrl_state *fsl_get_pins_state(struct pinctrl *pinctrl,
+ struct snd_pcm_hw_params *params)
+{
+ int dsd_bclk;
+ struct pinctrl_state *state = 0;
+
+ if (fsl_is_dsd(params)) {
+ dsd_bclk = params_rate(params) * params_physical_width(params);
+
+ switch (dsd_bclk) {
+ case 22579200: /* DSD512 */
+ state = pinctrl_lookup_state(pinctrl, "dsd512");
+ break;
+ }
+
+ /* Get default DSD state */
+ if (IS_ERR_OR_NULL(state))
+ state = pinctrl_lookup_state(pinctrl, "dsd");
+ }
+
+ /* Get default state */
+ if (IS_ERR_OR_NULL(state))
+ state = pinctrl_lookup_state(pinctrl, "default");
+
+ return state;
+}
+
+#endif /* __FSL_DSD_H */
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