[alsa-devel] [PATCH v4 12/14] ASoC: hdac_hdmi: Add codec suspend/resume handler

[Subhransu S. Prusty]

From: Jeeja KP <jeeja.kp at intel.com>

Need to add enabling of all pins and DP1.2 feature again after
resume. Also during the device in suspended state ELD notify
callback is not processed. So add ELD check for all pins here.

Signed-off-by: Jeeja KP <jeeja.kp at intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
 sound/soc/codecs/hdac_hdmi.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 15dbf67..f02a9fe 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -1235,9 +1235,34 @@ static int hdmi_codec_remove(struct snd_soc_codec *codec)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int hdmi_codec_resume(struct snd_soc_codec *codec)
+{
+	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
+	struct hdac_hdmi_priv *hdmi = edev->private_data;
+	struct hdac_hdmi_pin *pin;
+
+	hdac_hdmi_skl_enable_all_pins(&edev->hdac);
+	hdac_hdmi_skl_enable_dp12(&edev->hdac);
+
+	/*
+	 * As the ELD notify callback request is not entertained while the
+	 * device is in suspend state. Need to manually check detection of
+	 * all pins here.
+	 */
+	list_for_each_entry(pin, &hdmi->pin_list, head)
+		hdac_hdmi_present_sense(pin, 1);
+
+	return 0;
+}
+#else
+#define hdmi_codec_resume NULL
+#endif
+
 static struct snd_soc_codec_driver hdmi_hda_codec = {
 	.probe		= hdmi_codec_probe,
 	.remove		= hdmi_codec_remove,
+	.resume		= hdmi_codec_resume,
 	.idle_bias_off	= true,
 };
 
-- 
1.9.1