intelhdmi - dont power off HDA link
For codecs without EPSS support (G45/IbexPeak), the hotplug event will
be lost if the HDA is powered off during the time. After that the pin
presence detection verb returns inaccurate info.
So always power-on HDA link for !EPSS codecs.
KarL offers the fact and Takashi recommends to flag hda_bus. Thanks!
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index 3990182..918f403 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -391,6 +391,17 @@
}
}
+ /*
+ * G45/IbexPeak don't support EPSS: the unsolicited pin hot plug event
+ * can be lost and presence sense verb will become inaccurate if the
+ * HDA link is powered off at hot plug or hw initialization time.
+ */
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+ if (!(snd_hda_param_read(codec, codec->afg, AC_PAR_POWER_STATE) &
+ AC_PWRST_EPSS))
+ codec->bus->power_keep_link_on = 1;
+#endif
+
return 0;
}