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