Adolfo Reyna
340953b1f6
- Add input-gain-percent property (0..2000, default 100) to everest,es8311 binding - Extend Es8311Config with input_gain_percent, Es8311Data with input_gain float - Implement get_input_gain_multiplier() so audio-stream can apply digital boost on top of HW gain - Change HW gain mapping 100% -> 42dB (was 24dB) to restore +30dB behavior remembered from pre audio-stream driver (ES8311 supports 0/6/12/18/24/30/36/42 per vendor) - Validate percent <=2000 in start_device() - Set ES3C28P (2.8" color) and ES3C35P (3.5" color) DTS to input-gain-percent = <100> (no extra digital, pure HW 42dB max, software volume can lower) - Fixes quiet mic even at 100% and allows tunable digital boost via devicetree for boards with quiet MEMS capsules
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <tactility/error.h>
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#include <tactility/drivers/audio_codec.h>
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struct Device;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief ES8311 codec device configuration.
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*
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* The ES8311 is wired as both control (I2C) and audio (I2S) device: the I2C
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* bus is the device's parent (per i2c-device.yaml), while the I2S controller
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* is referenced via a devicetree phandle. It operates in dual mode
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* (speaker output + mic input) on boards such as M5Stack StickS3.
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*/
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struct Es8311Config {
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/** I2C address on the bus (typically 0x18) */
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uint8_t address;
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/** I2S controller device that carries audio data */
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struct Device* i2s_device;
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/**
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* Extra fixed digital gain multiplier applied by audio_stream on top of the ES8311's
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* own hardware ADC gain (0..24dB), as an integer percentage (100 = 1.0x / no extra boost).
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* Small MEMS mic capsules can still sound quiet even near max hardware gain; this is for
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* boards where 24dB hardware gain alone isn't enough. devicetree has no float property type,
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* hence the x100 integer encoding.
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*/
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uint16_t input_gain_percent;
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};
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#ifdef __cplusplus
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}
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#endif
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