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ASoC: tegra: Fix kcontrol put callback in ADX 

The kcontrol put callback is expected to return 1 when there is change
in HW or when the update is acknowledged by driver. This would ensure
that change notifications are sent to subscribed applications. Filter
out duplicate updates in ADX driver.

Fixes: a99ab6f395 ("ASoC: tegra: Add Tegra210 based ADX driver")
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Suggested-by: Jaroslav Kysela <perex@perex.cz>
Suggested-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/1637219231-406-16-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sameer Pujar 2021-11-18 12:37:10 +05:30 committed by Mark Brown
parent 8db78ace1b
commit 3c97881b8c
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1 changed files with 3 additions and 0 deletions
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3
sound/soc/tegra/tegra210_adx.c
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@ -193,6 +193,9 @@ static int tegra210_adx_put_byte_map(struct snd_kcontrol *kcontrol,
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;;
if (value == bytes_map[mc->reg])
return 0;
if (value >= 0 && value <= 255) {
/* update byte map and enable slot */
bytes_map[mc->reg] = value;