| Message ID | 20230127165111.3010960-8-sbinding@opensource.cirrus.com |
|---|---|
| State | New |
| Headers | show |
| Series | ASoC: cs42l42: Add SoundWire support | expand |
On 1/27/23 10:51, Stefan Binding wrote: > From: Richard Fitzgerald <rf@opensource.cirrus.com> > > idle_bias_on was set because cs42l42 has a "VMID" type pseudo-midrail > supply (named FILT+), and these typically take a long time to charge. > But the driver never enabled pm_runtime so it would never have powered- > down the cs42l42 anyway. > > In fact, FILT+ can charge to operating voltage within 12.5 milliseconds > of enabling HP or ADC. This time is already covered by the startup > delay of the HP/ADC. > > The datasheet warning about FILT+ taking up to 1 second to charge only > applies in the special cases that either the PLL is started or > DETECT_MODE set to non-zero while both HP and ADC are off. The driver > never does either of these. > > Removing idle_bias_on allows the Soundwire host controller to suspend > if there isn't a snd_soc_jack handler registered. > > Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> > Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> > --- > sound/soc/codecs/cs42l42.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c > index aa8d724432ab8..e3edaa1a2761e 100644 > --- a/sound/soc/codecs/cs42l42.c > +++ b/sound/soc/codecs/cs42l42.c > @@ -597,7 +597,6 @@ const struct snd_soc_component_driver cs42l42_soc_component = { > .num_dapm_routes = ARRAY_SIZE(cs42l42_audio_map), > .controls = cs42l42_snd_controls, > .num_controls = ARRAY_SIZE(cs42l42_snd_controls), > - .idle_bias_on = 1, > .endianness = 1, > }; > EXPORT_SYMBOL_NS_GPL(cs42l42_soc_component, SND_SOC_CS42L42_CORE);
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index aa8d724432ab8..e3edaa1a2761e 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -597,7 +597,6 @@ const struct snd_soc_component_driver cs42l42_soc_component = { .num_dapm_routes = ARRAY_SIZE(cs42l42_audio_map), .controls = cs42l42_snd_controls, .num_controls = ARRAY_SIZE(cs42l42_snd_controls), - .idle_bias_on = 1, .endianness = 1, }; EXPORT_SYMBOL_NS_GPL(cs42l42_soc_component, SND_SOC_CS42L42_CORE);