summaryrefslogtreecommitdiff
path: root/sound
diff options
context:
space:
mode:
authorTakashi Iwai <tiwai@suse.de>2018-03-17 22:40:18 +0100
committerTakashi Iwai <tiwai@suse.de>2018-03-17 22:51:39 +0100
commite40bdb03d3cd7da66bd0bc1e40cbcfb49351265c (patch)
treeaa06a2df67df94d49ea33a40c560f527fdbd7abe /sound
parentdb45dc9540ea4864bb9d22eed30d3e70ed5d56d4 (diff)
ALSA: hda/realtek - Always immediately update mute LED with pin VREF
Some HP laptops have a mute mute LED controlled by a pin VREF. The Realtek codec driver updates the VREF via vmaster hook by calling snd_hda_set_pin_ctl_cache(). This works fine as long as the driver is running in a normal mode. However, when the VREF change happens during the codec being in runtime PM suspend, the regmap access will skip and postpone the actual register change. This ends up with the unchanged LED status until the next runtime PM resume even if you change the Master mute switch. (Interestingly, the machine keeps the LED status even after the codec goes into D3 -- but it's another story.) For improving this usability, let the driver temporarily powering up / down only during the pin VREF change. This can be achieved easily by wrapping the call with snd_hda_power_up_pm() / *_down_pm(). Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199073 Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_realtek.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 9af301c6bba2..5ef056f2aecc 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3596,8 +3596,12 @@ static void alc269_fixup_mic_mute_hook(void *private_data, int enabled)
pinval = snd_hda_codec_get_pin_target(codec, spec->mute_led_nid);
pinval &= ~AC_PINCTL_VREFEN;
pinval |= enabled ? AC_PINCTL_VREF_HIZ : AC_PINCTL_VREF_80;
- if (spec->mute_led_nid)
+ if (spec->mute_led_nid) {
+ /* temporarily power up/down for setting VREF */
+ snd_hda_power_up_pm(codec);
snd_hda_set_pin_ctl_cache(codec, spec->mute_led_nid, pinval);
+ snd_hda_power_down_pm(codec);
+ }
}
/* Make sure the led works even in runtime suspend */