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ASoC: qcom: sc8280xp: Limit speaker digital volumes

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Limit the speaker digital gains to 0dB so that the users will not damage them.
Currently there is a limit in UCM, but this does not stop the user form
changing the digital gains from command line. So limit this in driver
which makes the speakers more safer without active speaker protection in
place.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20231204124736.132185-3-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2023-12-04 12:47:36 +00:00 committed by Mark Brown
parent fb9ad24485
commit 716d4e5373
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GPG key ID: 24D68B725D5487D0
1 changed files with 17 additions and 0 deletions
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17
sound/soc/qcom/sc8280xp.c
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@ -27,6 +27,23 @@ struct sc8280xp_snd_data {
static int sc8280xp_snd_init(struct snd_soc_pcm_runtime *rtd)
{
struct sc8280xp_snd_data *data = snd_soc_card_get_drvdata(rtd->card);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
struct snd_soc_card *card = rtd->card;
switch (cpu_dai->id) {
case WSA_CODEC_DMA_RX_0:
case WSA_CODEC_DMA_RX_1:
/*
* set limit of 0dB on Digital Volume for Speakers,
* this can prevent damage of speakers to some extent without
* active speaker protection
*/
snd_soc_limit_volume(card, "WSA_RX0 Digital Volume", 84);
snd_soc_limit_volume(card, "WSA_RX1 Digital Volume", 84);
break;
default:
break;
}
return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
}