Opt-in to use snd_hdac_ext_bus_link_power() to manage HDA link
power up/down events.
This allows to reduce power consumption in cases where some HDA codecs
are suspended, but other child devices (HDA or non-HDA codecs) remain
active and controller itself remains in active state.
By using snd_hdac_ext_bus_link_power(), the individual HDA links can be
powered off and if all HDA codecs are powered down, the command DMA can
also be shut down.
Signed-off-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>
---
sound/soc/sof/intel/hda-bus.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/sound/soc/sof/intel/hda-bus.c b/sound/soc/sof/intel/hda-bus.c
index 789148e5584b..1ac6e79d7e62 100644
--- a/sound/soc/sof/intel/hda-bus.c
+++ b/sound/soc/sof/intel/hda-bus.c
@@ -19,13 +19,21 @@
#define sof_hda_ext_ops NULL
#endif
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
+static const struct hdac_bus_ops bus_core_ops = {
+ .command = snd_hdac_bus_send_cmd,
+ .get_response = snd_hdac_bus_get_response,
+ .link_power = snd_hdac_ext_bus_link_power,
+};
+#endif
+
/*
* This can be used for both with/without hda link support.
*/
void sof_hda_bus_init(struct hdac_bus *bus, struct device *dev)
{
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
- snd_hdac_ext_bus_init(bus, dev, NULL, sof_hda_ext_ops);
+ snd_hdac_ext_bus_init(bus, dev, &bus_core_ops, sof_hda_ext_ops);
#else /* CONFIG_SND_SOC_SOF_HDA */
memset(bus, 0, sizeof(*bus));
bus->dev = dev;
--
2.29.2
