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/*
* 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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