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-rw-r--r--sound/soc/codecs/hdac_hdmi.c11
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.
*/