diff options
| -rw-r--r-- | sound/soc/codecs/hdac_hdmi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index 5eeb0fe836a9..4de1fbfa8827 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -1855,6 +1855,17 @@ static int hdmi_codec_probe(struct snd_soc_component *component) hdmi->card = dapm->card->snd_card; /* + * Setup a device_link between card device and HDMI codec device. + * The card device is the consumer and the HDMI codec device is + * the supplier. With this setting, we can make sure that the audio + * domain in display power will be always turned on before operating + * on the HDMI audio codec registers. + * Let's use the flag DL_FLAG_AUTOREMOVE_CONSUMER. This can make + * sure the device link is freed when the machine driver is removed. + */ + device_link_add(component->card->dev, &hdev->dev, DL_FLAG_RPM_ACTIVE | + DL_FLAG_AUTOREMOVE_CONSUMER); + /* * hdac_device core already sets the state to active and calls * get_noresume. So enable runtime and set the device to suspend. */ |