diff options
Diffstat (limited to 'sound/soc/fsl/fsl_dsd.h')
| -rw-r--r-- | sound/soc/fsl/fsl_dsd.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_dsd.h b/sound/soc/fsl/fsl_dsd.h new file mode 100644 index 000000000000..bc149631a2af --- /dev/null +++ b/sound/soc/fsl/fsl_dsd.h @@ -0,0 +1,58 @@ +/* + * 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, u32 bclk) +{ + struct pinctrl_state *state = 0; + + if (fsl_is_dsd(params)) { + /* DSD512@44.1kHz, DSD512@48kHz */ + if (bclk >= 22579200) + state = pinctrl_lookup_state(pinctrl, "dsd512"); + + /* Get default DSD state */ + if (IS_ERR_OR_NULL(state)) + state = pinctrl_lookup_state(pinctrl, "dsd"); + } else { + /* 706k32b2c, 768k32b2c, etc */ + if (bclk >= 45158400) + state = pinctrl_lookup_state(pinctrl, "pcm_b2m"); + } + + /* Get default state */ + if (IS_ERR_OR_NULL(state)) + state = pinctrl_lookup_state(pinctrl, "default"); + + return state; +} + +#endif /* __FSL_DSD_H */ |