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ASoC: SOF: topology: set default values to volume control #258

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merged 1 commit into from
Nov 8, 2018
Merged

ASoC: SOF: topology: set default values to volume control #258

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12 changes: 12 additions & 0 deletions sound/soc/sof/topology.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,9 +33,12 @@
/* 40th root of 10 in Q1.16 fixed-point notation*/
#define VOL_FORTIETH_ROOT_OF_TEN 69419
/* Volume fractional word length */
/* Define to 16 sets the volume linear gain value to use Qx.16 format */
#define VOLUME_FWL 16
/* 0.5 dB step value in topology TLV */
#define VOL_HALF_DB_STEP 50
/* Full volume for default values */
#define VOL_ZERO_DB BIT(VOLUME_FWL)

/* TLV data items */
#define TLV_ITEMS 3
Expand Down Expand Up @@ -1193,8 +1196,10 @@ static int sof_widget_load_pga(struct snd_soc_component *scomp, int index,
const struct snd_kcontrol_new *kc = NULL;
struct soc_mixer_control *sm;
struct snd_sof_control *scontrol;
struct sof_ipc_ctrl_data *cdata;
const unsigned int *p;
int ret, tlv[TLV_ITEMS];
unsigned int i;

volume = kzalloc(sizeof(*volume), GFP_KERNEL);
if (!volume)
Expand Down Expand Up @@ -1258,6 +1263,13 @@ static int sof_widget_load_pga(struct snd_soc_component *scomp, int index,
goto err;
}

/* set default volume values to 0dB in control */
cdata = scontrol->control_data;
for (i = 0; i < scontrol->num_channels; i++) {
cdata->chanv[i].channel = i;
cdata->chanv[i].value = VOL_ZERO_DB;
}

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do you happen to know how this will work or interfere with alsactrl trying to restore previous values?

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it should work, because this is topology loading, and I guess any alsactl command should not come in the middle (?). Not sure what happens if control is called in the middle of topology loading. PM is caching the stuff and in reload this part is never called. However, good point, I'll re-enable my alsactl and give it a try anyway.

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@plbossart I tested with following scenario in my ubuntu:

  1. alsactl removed, so "first boot" set both pga channels to 0db
  2. I changed manually from alsamixer the pga volumes and re-enabled alsactl
  3. after boot the pga volumes are still in positions I set in 2

So I can't still guarantee fully all use cases, but this basic one is working.

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works for me as well, I took the code and all the settings were moved to 0dB on all PGAs. I changed one of the gains, rebooted and the values were kept, so it looks functional to me. Will merge, thanks Jaska!

sof_dbg_comp_config(scomp, &volume->config);

swidget->private = (void *)volume;
Expand Down