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authorWu Fengguang <fengguang.wu@intel.com>2009-12-11 15:15:11 +0300
committerTakashi Iwai <tiwai@suse.de>2009-12-11 16:06:18 +0300
commit0287d970652027d5e299e0215578f228660a0e4e (patch)
tree9147b88351f901747fb25e8f7a396e1afd4b0a2b /sound/pci
parentb14224bb74e19072c34617c501bceab94ebf579f (diff)
downloadlinux-0287d970652027d5e299e0215578f228660a0e4e.tar.xz
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>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/hda_codec.h1
-rw-r--r--sound/pci/hda/hda_intel.c3
-rw-r--r--sound/pci/hda/patch_intelhdmi.c11
3 files changed, 14 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 9000d52fccca..1d541b7f5547 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -639,6 +639,7 @@ struct hda_bus {
unsigned int rirb_error:1; /* error in codec communication */
unsigned int response_reset:1; /* controller was reset */
unsigned int in_reset:1; /* during reset operation */
+ unsigned int power_keep_link_on:1; /* don't power off HDA link */
};
/*
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index efcc4f7c57f2..e54420e691ae 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2082,7 +2082,8 @@ static void azx_power_notify(struct hda_bus *bus)
}
if (power_on)
azx_init_chip(chip);
- else if (chip->running && power_save_controller)
+ else if (chip->running && power_save_controller &&
+ !bus->power_keep_link_on)
azx_stop_chip(chip);
}
#endif /* CONFIG_SND_HDA_POWER_SAVE */
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index 3990182777ee..918f40378d52 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -391,6 +391,17 @@ static int intel_hdmi_parse_codec(struct hda_codec *codec)
}
}
+ /*
+ * 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;
}