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ba2a0e81d4
Export the Q7.8 volume control helpers to allow reuse by other ASoC drivers. These functions handle 16-bit signed Q7.8 fixed-point format values for volume controls. Changes include: - Rename q78_get_volsw to sdca_asoc_q78_get_volsw - Rename q78_put_volsw to sdca_asoc_q78_put_volsw - Add a convenience macro SDCA_SINGLE_Q78_TLV and SDCA_DOUBLE_Q78_TLV for creating mixer controls This allows other ASoC drivers to easily implement controls using the Q7.8 fixed-point format without duplicating code. Signed-off-by: Niranjan H Y <niranjan.hy@ti.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://patch.msgid.link/20260401132148.2367-1-niranjan.hy@ti.com Signed-off-by: Mark Brown <broonie@kernel.org>
103 lines
3.7 KiB
C
103 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* The MIPI SDCA specification is available for public downloads at
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* https://www.mipi.org/mipi-sdca-v1-0-download
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*
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* Copyright (C) 2025 Cirrus Logic, Inc. and
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* Cirrus Logic International Semiconductor Ltd.
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*/
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#ifndef __SDCA_ASOC_H__
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#define __SDCA_ASOC_H__
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struct device;
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struct regmap;
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struct sdca_function_data;
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struct snd_ctl_elem_value;
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struct snd_kcontrol;
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struct snd_kcontrol_new;
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struct snd_pcm_hw_params;
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struct snd_pcm_substream;
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struct snd_soc_component_driver;
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struct snd_soc_dai;
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struct snd_soc_dai_driver;
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struct snd_soc_dai_ops;
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struct snd_soc_dapm_route;
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struct snd_soc_dapm_widget;
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/* convenient macro to handle the mono volume in 7.8 fixed format representation */
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#define SDCA_SINGLE_Q78_TLV(xname, xreg, xmin, xmax, xstep, tlv_array) \
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{ \
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
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.name = (xname), \
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.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE, \
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.tlv.p = (tlv_array), \
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.info = snd_soc_info_volsw, \
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.get = sdca_asoc_q78_get_volsw, \
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.put = sdca_asoc_q78_put_volsw, \
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.private_value = (unsigned long)&(struct soc_mixer_control) { \
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.reg = (xreg), .rreg = (xreg), \
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.min = (xmin), .max = (xmax), \
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.shift = (xstep), .rshift = (xstep), \
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.sign_bit = 15 \
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} \
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}
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/* convenient macro for stereo volume in 7.8 fixed format with separate registers for L/R */
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#define SDCA_DOUBLE_Q78_TLV(xname, xreg_l, xreg_r, xmin, xmax, xstep, tlv_array) \
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{ \
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
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.name = (xname), \
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.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_READWRITE, \
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.tlv.p = (tlv_array), \
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.info = snd_soc_info_volsw, \
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.get = sdca_asoc_q78_get_volsw, \
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.put = sdca_asoc_q78_put_volsw, \
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.private_value = (unsigned long)&(struct soc_mixer_control) { \
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.reg = (xreg_l), .rreg = (xreg_r), \
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.min = (xmin), .max = (xmax), \
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.shift = (xstep), .rshift = (xstep), \
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.sign_bit = 15 \
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} \
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}
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int sdca_asoc_count_component(struct device *dev, struct sdca_function_data *function,
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int *num_widgets, int *num_routes, int *num_controls,
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int *num_dais);
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int sdca_asoc_populate_dapm(struct device *dev, struct sdca_function_data *function,
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struct snd_soc_dapm_widget *widgets,
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struct snd_soc_dapm_route *routes);
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int sdca_asoc_populate_controls(struct device *dev,
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struct sdca_function_data *function,
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struct snd_kcontrol_new *kctl);
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int sdca_asoc_populate_dais(struct device *dev, struct sdca_function_data *function,
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struct snd_soc_dai_driver *dais,
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const struct snd_soc_dai_ops *ops);
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int sdca_asoc_populate_component(struct device *dev,
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struct sdca_function_data *function,
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struct snd_soc_component_driver *component_drv,
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struct snd_soc_dai_driver **dai_drv, int *num_dai_drv,
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const struct snd_soc_dai_ops *ops);
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int sdca_asoc_set_constraints(struct device *dev, struct regmap *regmap,
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struct sdca_function_data *function,
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struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai);
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void sdca_asoc_free_constraints(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai);
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int sdca_asoc_get_port(struct device *dev, struct regmap *regmap,
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struct sdca_function_data *function,
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struct snd_soc_dai *dai);
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int sdca_asoc_hw_params(struct device *dev, struct regmap *regmap,
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struct sdca_function_data *function,
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struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai);
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int sdca_asoc_q78_put_volsw(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol);
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int sdca_asoc_q78_get_volsw(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol);
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#endif // __SDCA_ASOC_H__
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