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ASoC: Intel: Boards: tgl_max98373: add dai_trigger function 

Speaker amplifier feedback is not modeled as being dependent on any
active output. Even when there is no playback happening, parts of the
graph, specifically the IV sense->speaker protection->output remains
active and this prevents the DSP from entering low-power states.

This patch suggests a machine driver level approach where the speaker
pins are enabled/disabled dynamically depending on stream start/stop
events. DPAM graph representations show the feedback loop is indeed
disabled and low-power states can be reached.

Signed-off-by: Dharageswari R <dharageswari.r@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20200625191308.3322-8-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dharageswari R 2020-06-25 14:12:58 -05:00 committed by Mark Brown
parent 2697f3af42
commit 94d2d08974
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 54 additions and 0 deletions
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45
sound/soc/intel/boards/sof_maxim_common.c
View File

@ -9,6 +9,8 @@
#include <uapi/sound/asound.h>
#include "sof_maxim_common.h"
#define MAX_98373_PIN_NAME 16
static const struct snd_soc_dapm_route max_98373_dapm_routes[] = {
/* speaker */
{ "Left Spk", NULL, "Left BE_OUT" },
@ -57,8 +59,51 @@ static int max98373_hw_params(struct snd_pcm_substream *substream,
return 0;
}
static int max98373_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai;
int j;
int ret = 0;
for_each_rtd_codec_dais(rtd, j, codec_dai) {
struct snd_soc_component *component = codec_dai->component;
struct snd_soc_dapm_context *dapm =
snd_soc_component_get_dapm(component);
char pin_name[MAX_98373_PIN_NAME];
snprintf(pin_name, ARRAY_SIZE(pin_name), "%s Spk",
codec_dai->component->name_prefix);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = snd_soc_dapm_enable_pin(dapm, pin_name);
if (!ret)
snd_soc_dapm_sync(dapm);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
/* Make sure no streams are active before disable pin */
if (snd_soc_dai_active(codec_dai) != 1)
break;
ret = snd_soc_dapm_disable_pin(dapm, pin_name);
if (!ret)
snd_soc_dapm_sync(dapm);
break;
default:
break;
}
}
return ret;
}
struct snd_soc_ops max_98373_ops = {
.hw_params = max98373_hw_params,
.trigger = max98373_trigger,
};
int max98373_spk_codec_init(struct snd_soc_pcm_runtime *rtd)

9
sound/soc/intel/boards/sof_rt5682.c
View File

@ -318,6 +318,7 @@ static int sof_card_late_probe(struct snd_soc_card *card)
{
struct sof_card_private *ctx = snd_soc_card_get_drvdata(card);
struct snd_soc_component *component = NULL;
struct snd_soc_dapm_context *dapm = &card->dapm;
char jack_name[NAME_SIZE];
struct sof_hdmi_pcm *pcm;
int err;
@ -356,6 +357,14 @@ static int sof_card_late_probe(struct snd_soc_card *card)
i++;
}
if (sof_rt5682_quirk & SOF_MAX98373_SPEAKER_AMP_PRESENT) {
/* Disable Left and Right Spk pin after boot */
snd_soc_dapm_disable_pin(dapm, "Left Spk");
snd_soc_dapm_disable_pin(dapm, "Right Spk");
err = snd_soc_dapm_sync(dapm);
if (err < 0)
return err;
}
return hdac_hdmi_jack_port_init(component, &card->dapm);
}