When system is suspended with active audio playback to HDMI/DP, two
alternative sequences can happen at resume:
a) monitor is detected first and ALSA prepare follows normal
stream setup sequence, or
b) ALSA prepare is called first, but monitor is not yet detected,
so PCM is restarted without a pin,
In case of (b), on i915 systems, haswell_verify_D0() is not called at
resume and the pin power state may be incorrect. Result is lack of audio
after resume with no error reported back to user-space.
Fix the problem by always verifying converter and pin state in the
i915_pin_cvt_fixup().
BugLink: https://github.com/thesofproject/linux/issues/2388
Signed-off-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>
---
sound/pci/hda/patch_hdmi.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 3259d713ace9..1e1b13eb7829 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2794,6 +2794,7 @@ static void i915_pin_cvt_fixup(struct hda_codec *codec,
hda_nid_t cvt_nid)
{
if (per_pin) {
+ haswell_verify_D0(codec, per_pin->cvt_nid, per_pin->pin_nid);
snd_hda_set_dev_select(codec, per_pin->pin_nid,
per_pin->dev_id);
intel_verify_pin_cvt_connect(codec, per_pin);
--
2.27.0
