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ASoC: tegra: Fix kcontrol put callback in AMX

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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 AMX driver.

Fixes: 77f7df346c ("ASoC: tegra: Add Tegra210 based AMX 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/1637219231-406-15-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sameer Pujar 2021-11-18 12:37:09 +05:30 committed by Mark Brown
parent b31f8febd1
commit 8db78ace1b
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1 changed files with 3 additions and 0 deletions
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3
sound/soc/tegra/tegra210_amx.c
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@ -222,6 +222,9 @@ static int tegra210_amx_put_byte_map(struct snd_kcontrol *kcontrol,
int reg = mc->reg;
int value = ucontrol->value.integer.value[0];
if (value == bytes_map[reg])
return 0;
if (value >= 0 && value <= 255) {
/* Update byte map and enable slot */
bytes_map[reg] = value;