[alsa-devel] [Intel-gfx] [PATCH 4/4] ALSA: hda - Wake the codec up on pin/ELD notify events

[Takashi Iwai]

On Thu, 26 Nov 2015 08:57:30 +0100,
Zhang, Xiong Y wrote:
> 
> > > > BTW, I have a patchset to avoid the audio h/w wakeup by a new
> > > > component ops to get ELD and connection states.  It was posted to
> > > > alsa-devel shortly ago just as a reference, but this should work well
> > > > in such a case, too.  The test patches are found in test/hdmi-jack
> > > > branch of my sound git tree.
> > 
> > Did you try this branch (merge onto intel-test-nightly)?
> > 
> [Zhang, Xiong Y] Yes, this branch could fix my issue.

OK, good to hear.  But this isn't for 4.4 or backport, as it's more
radical changes.

Could you check the patch below instead?  This suppresses the notifier
handling during suspend.  It's bad, but the hotplug should be still
handled via normal unsol event, so it should keep working, good enough
as a stop gap.


Takashi

---
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index bdb6f226d006..f7c70e2ae65c 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -33,6 +33,7 @@
 #include <linux/delay.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/pm_runtime.h>
 #include <sound/core.h>
 #include <sound/jack.h>
 #include <sound/asoundef.h>
@@ -2352,7 +2353,9 @@ static void intel_pin_eld_notify(void *audio_ptr, int port)
 	struct hda_codec *codec = audio_ptr;
 	int pin_nid = port + 0x04;
 
-	check_presence_and_report(codec, pin_nid);
+	if (!atomic_read(&codec->core.in_pm) &&
+	    !pm_runtime_suspended(hda_codec_dev(codec)))
+		check_presence_and_report(codec, pin_nid);
 }
 
 static int patch_generic_hdmi(struct hda_codec *codec)