On 04/03/2021 1:49 pm, Takashi Iwai wrote:
On Wed, 03 Mar 2021 19:29:59 +0100,
Vitaly Rodionov wrote:
+static int cs8409_cs42l42_volume_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ hda_nid_t nid = get_amp_nid(kcontrol);
+ int chs = get_amp_channels(kcontrol);
+ long *valp = ucontrol->value.integer.value;
+ char vol = 0;
+
+ codec_dbg(codec, "%s() nid: %d\n", __func__, nid);
+ snd_hda_power_up(codec);
+ switch (nid) {
+ case CS8409_CS42L42_HP_PIN_NID:
+ mutex_lock(&cs8409_i2c_mux);
+ if (chs & 1) {
+ vol = -(cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
+ CS8409_CS42L42_REG_HS_VOLUME_CHA, 1));
Better to cache the values instead of i2c read at each time?
Then the unnecessary power up/down sequence can be avoided, too.
Yes, agree. Will be fixed in next version of patch.
thanks,
Takashi
Thank you,
Vitaly