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.
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
sound/pci/hda/hda_codec.h | 1 +
sound/pci/hda/hda_intel.c | 2 ++
sound/pci/hda/patch_intelhdmi.c | 11 +++++++++++
3 files changed, 14 insertions(+)
--- sound-2.6.orig/sound/pci/hda/hda_intel.c 2009-12-10 12:45:24.000000000 +0800
+++ sound-2.6/sound/pci/hda/hda_intel.c 2009-12-10 20:10:51.000000000 +0800
@@ -2079,6 +2079,8 @@ static void azx_power_notify(struct hda_
power_on = 1;
break;
}
+ if (c->power_keep_link_on)
+ power_save_controller = 0;
}
if (power_on)
azx_init_chip(chip);
--- sound-2.6.orig/sound/pci/hda/patch_intelhdmi.c 2009-12-10 12:56:41.000000000 +0800
+++ sound-2.6/sound/pci/hda/patch_intelhdmi.c 2009-12-10 20:19:32.000000000 +0800
@@ -391,6 +391,17 @@ static int intel_hdmi_parse_codec(struct
}
}
+ /*
+ * 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->power_keep_link_on = 1;
+#endif
+
return 0;
}
--- sound-2.6.orig/sound/pci/hda/hda_codec.h 2009-12-10 12:45:24.000000000 +0800
+++ sound-2.6/sound/pci/hda/hda_codec.h 2009-12-10 20:10:51.000000000 +0800
@@ -819,6 +819,7 @@ struct hda_codec {
#ifdef CONFIG_SND_HDA_POWER_SAVE
unsigned int power_on :1; /* current (global) power-state */
unsigned int power_transition :1; /* power-state in transition */
+ unsigned int power_keep_link_on :1; /* don't power off HDA link */
int power_count; /* current (global) power refcount */
struct delayed_work power_work; /* delayed task for powerdown */
unsigned long power_on_acct;
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