linux-kernel - [PATCH 4.8 069/140] ALSA: hda - Fix a failure of micmute led when having multi adcs

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Message-Id: <20161026122223.347856820@linuxfoundation.org>
Date:   Wed, 26 Oct 2016 14:22:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hui Wang <hui.wang@...onical.com>,
        Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 4.8 069/140] ALSA: hda - Fix a failure of micmute led when having multi adcs

4.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hui Wang <hui.wang@...onical.com>

commit 4875a5f7218068cdeea5f998330dfa3d118b2fea upstream.

On a Dell laptop, there is no global adcs for all input devices, so
the input devices use the different adc, as a result, dyn_adc_switch
is set to true.

In this situation, it is safe to control the micmute led according to
user's choice of muting/unmuting the current input device, since only
current input device path is active, while other input device paths
are inactive and powered down.

Fixes: 00ef99408b6c ('ALSA: hda - add mic mute led hook for dell machines')
Signed-off-by: Hui Wang <hui.wang@...onical.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/pci/hda/dell_wmi_helper.c |    2 +-
 sound/pci/hda/thinkpad_helper.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/sound/pci/hda/dell_wmi_helper.c
+++ b/sound/pci/hda/dell_wmi_helper.c
@@ -49,7 +49,7 @@ static void alc_fixup_dell_wmi(struct hd
 		removefunc = true;
 		if (dell_led_set_func(DELL_LED_MICMUTE, false) >= 0) {
 			dell_led_value = 0;
-			if (spec->gen.num_adc_nids > 1)
+			if (spec->gen.num_adc_nids > 1 && !spec->gen.dyn_adc_switch)
 				codec_dbg(codec, "Skipping micmute LED control due to several ADCs");
 			else {
 				dell_old_cap_hook = spec->gen.cap_sync_hook;
--- a/sound/pci/hda/thinkpad_helper.c
+++ b/sound/pci/hda/thinkpad_helper.c
@@ -62,7 +62,7 @@ static void hda_fixup_thinkpad_acpi(stru
 			removefunc = false;
 		}
 		if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) {
-			if (spec->num_adc_nids > 1)
+			if (spec->num_adc_nids > 1 && !spec->dyn_adc_switch)
 				codec_dbg(codec,
 					  "Skipping micmute LED control due to several ADCs");
 			else {