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authorHui Wang <hui.wang@canonical.com>2014-08-19 12:07:03 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-09-05 16:36:26 -0700
commit93b0526997a77113018f0ae34ce64c825cee7aa1 (patch)
tree4f61e03084f9058fc068aebd896adcbaf398675a /sound
parent90d56ca39f7ed1c69c16e6f34ce896ea16e43c87 (diff)
ALSA: hda - restore the gpio led after resume
commit f475371aa65de84fa483a998ab7594531026b9d9 upstream. On some HP laptops, the mute led is controlled by codec gpio. When some machine resume from s3/s4, the codec gpio data will be cleared to 0 by BIOS: Before suspend: IO[3]: enable=1, dir=1, wake=0, sticky=0, data=1, unsol=0 After resume: IO[3]: enable=1, dir=1, wake=0, sticky=0, data=0, unsol=0 To skip the AFG node to enter D3 can't fix this problem. A workaround is to restore the gpio data when the system resume back from s3/s4. It is safe even on the machines without this problem. BugLink: https://bugs.launchpad.net/bugs/1358116 Tested-by: Franz Hsieh <franz.hsieh@canonical.com> Signed-off-by: Hui Wang <hui.wang@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_realtek.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index eafffa51f51b..a011c704056c 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3242,6 +3242,15 @@ static int alc269_resume(struct hda_codec *codec)
snd_hda_codec_resume_cache(codec);
alc_inv_dmic_sync(codec, true);
hda_call_check_power_status(codec, 0x01);
+
+ /* on some machine, the BIOS will clear the codec gpio data when enter
+ * suspend, and won't restore the data after resume, so we restore it
+ * in the driver.
+ */
+ if (spec->gpio_led)
+ snd_hda_codec_write(codec, codec->afg, 0, AC_VERB_SET_GPIO_DATA,
+ spec->gpio_led);
+
if (spec->has_alc5505_dsp)
alc5505_dsp_resume(codec);