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| author | Tzung-Bi Shih <tzungbi@chromium.org> | 2019-06-28 13:41:24 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-09-17 14:56:59 +0000 |
| commit | 6a159855aae92c3d98a4927babb4a8319d644c1e (patch) | |
| tree | 58ddc25322bdeb245370c0d3fdfc4cef58ee9cf0 | |
| parent | 0ba3ba3049226e92d6cf64ed06031ec9a3bb7949 (diff) | |
| download | chrome-ec-6a159855aae92c3d98a4927babb4a8319d644c1e.tar.gz | |
audio_codec: support software gain
Chip or board can define a scaler for software gain for up to 8
channels.
BRANCH=none
BUG=b:122027734, b:123268236
TEST=1. define CONFIG_AUDIO_CODEC in board.h
2. define CONFIG_AUDIO_CODEC_DMIC in board.h
3. define CONFIG_AUDIO_CODEC_DMIC_SOFTWARE_GAIN in board.h
4. define CONFIG_AUDIO_CODEC_DMIC_MAX_SOFTWARE_GAIN in board.h
5. make BOARD=kukui_scp -j
Change-Id: I38418ca9bda7973f35d35947a55cad8180eb4df0
Signed-off-by: Tzung-Bi Shih <tzungbi@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1683027
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
| -rw-r--r-- | common/audio_codec_dmic.c | 30 | ||||
| -rw-r--r-- | include/config.h | 3 |
2 files changed, 33 insertions, 0 deletions
diff --git a/common/audio_codec_dmic.c b/common/audio_codec_dmic.c index 461b8508e9..986451650e 100644 --- a/common/audio_codec_dmic.c +++ b/common/audio_codec_dmic.c @@ -75,3 +75,33 @@ static int dmic_host_command(struct host_cmd_handler_args *args) return EC_RES_INVALID_PARAM; } DECLARE_HOST_COMMAND(EC_CMD_EC_CODEC_DMIC, dmic_host_command, EC_VER_MASK(0)); + +#ifdef CONFIG_AUDIO_CODEC_DMIC_SOFTWARE_GAIN +static uint8_t channel_gains[EC_CODEC_DMIC_CHANNEL_COUNT]; + +int audio_codec_dmic_get_max_gain(uint8_t *gain) +{ + *gain = CONFIG_AUDIO_CODEC_DMIC_MAX_SOFTWARE_GAIN; + return EC_SUCCESS; +} + +int audio_codec_dmic_set_gain_idx(uint8_t channel, uint8_t gain) +{ + if (channel >= ARRAY_SIZE(channel_gains)) + return EC_ERROR_INVAL; + if (gain > CONFIG_AUDIO_CODEC_DMIC_MAX_SOFTWARE_GAIN) + return EC_ERROR_INVAL; + + channel_gains[channel] = gain; + return EC_SUCCESS; +} + +int audio_codec_dmic_get_gain_idx(uint8_t channel, uint8_t *gain) +{ + if (channel >= ARRAY_SIZE(channel_gains)) + return EC_ERROR_INVAL; + + *gain = channel_gains[channel]; + return EC_SUCCESS; +} +#endif diff --git a/include/config.h b/include/config.h index b39196140a..207410cc92 100644 --- a/include/config.h +++ b/include/config.h @@ -354,6 +354,9 @@ #undef CONFIG_AUDIO_CODEC /* Support audio codec on DMIC. */ #undef CONFIG_AUDIO_CODEC_DMIC +/* Support audio codec software gain on DMIC. */ +#undef CONFIG_AUDIO_CODEC_DMIC_SOFTWARE_GAIN +#undef CONFIG_AUDIO_CODEC_DMIC_MAX_SOFTWARE_GAIN /* Allow proprietary communication protocols' extensions. */ #undef CONFIG_EXTENSION_COMMAND |