| /* |
| * 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 */ |