From: Sameer Pujar Date: Thu, 18 Nov 2021 07:07:10 +0000 (+0530) Subject: ASoC: tegra: Fix kcontrol put callback in ADX X-Git-Tag: v5.16-rc4~25^2~3^2~6 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=3c97881b8c8a2aa8afd4d7a379b7ff03884c9e4a;p=linux-block.git 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: a99ab6f395a9 ("ASoC: tegra: Add Tegra210 based ADX driver") Signed-off-by: Sameer Pujar Suggested-by: Jaroslav Kysela Suggested-by: Mark Brown Reviewed-by: Takashi Iwai Link: https://lore.kernel.org/r/1637219231-406-16-git-send-email-spujar@nvidia.com Signed-off-by: Mark Brown --- diff --git a/sound/soc/tegra/tegra210_adx.c b/sound/soc/tegra/tegra210_adx.c index d7c7849c2f92..933c4503fe50 100644 --- a/sound/soc/tegra/tegra210_adx.c +++ b/sound/soc/tegra/tegra210_adx.c @@ -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;