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ASoC: mediatek: mt6358: initialize setting when ramping volume 

Mt6358 ramps up from the smallest volume (i.e. -10dB) to target dB when
opening and ramps down from target dB to mute (i.e. -40dB) when closing.
If target is equal to -10dB when opening, headset_volume_ramp() simply
leaves current setting (which may not be -10dB) unchanged.

Execute the loop at least once to initialize the setting to the
starting point (i.e. from).

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Tzung-Bi Shih 2019-05-07 18:12:18 +08:00 committed by Mark Brown
parent ce38a75089
commit bdb8fa6b09
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 4 deletions
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7
sound/soc/codecs/mt6358.c
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@ -405,10 +405,9 @@ static bool is_valid_hp_pga_idx(int reg_idx)
reg_idx == DL_GAIN_N_40DB;
}
static void headset_volume_ramp(struct mt6358_priv *priv,
int from, int to)
static void headset_volume_ramp(struct mt6358_priv *priv, int from, int to)
{
int offset = 0, count = 1, reg_idx;
int offset = 0, count = 0, reg_idx;
if (!is_valid_hp_pga_idx(from) || !is_valid_hp_pga_idx(to))
dev_warn(priv->dev, "%s(), volume index is not valid, from %d, to %d\n",
@ -422,7 +421,7 @@ static void headset_volume_ramp(struct mt6358_priv *priv,
else
offset = from - to;
while (offset > 0) {
while (offset >= 0) {
if (to > from)
reg_idx = from + count;
else