ALSA: hda/realtek - Fix ADC assignment with a shared HP/Mic pin

The recent Realtek driver tries to assign an extra input via the
headphone plug when only a single input source is found.  The code
worked on Samsung Q1, but it broke ASUS 1015 where the mic is a
digital-mic and only a specific ADC works.

This patch fixes the assignment of ADC in the shared mic/hp case.
Instead of assuming the single ADC at first, reduce the ADCs after
trying to assign both mic and HP pins.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42973

Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 7 insertions, 4 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 8ea2fd654327..9917e55d6f11 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2717,9 +2717,6 @@ static int alc_auto_fill_adc_caps(struct hda_codec *codec)
         int max_nums = ARRAY_SIZE(spec->private_adc_nids);
         int i, nums = 0;
 
-        if (spec->shared_mic_hp)
-                max_nums = 1; /* no multi streams with the shared HP/mic */
-
         nid = codec->start_nid;
         for (i = 0; i < codec->num_nodes; i++, nid++) {
                 hda_nid_t src;
@@ -4076,6 +4073,7 @@ static void alc_remove_invalid_adc_nids(struct hda_codec *codec)
         if (spec->dyn_adc_switch)
                 return;
 
+ again:
         nums = 0;
         for (n = 0; n < spec->num_adc_nids; n++) {
                 hda_nid_t cap = spec->private_capsrc_nids[n];
@@ -4096,6 +4094,11 @@ static void alc_remove_invalid_adc_nids(struct hda_codec *codec)
         if (!nums) {
                 /* check whether ADC-switch is possible */
                 if (!alc_check_dyn_adc_switch(codec)) {
+                        if (spec->shared_mic_hp) {
+                                spec->shared_mic_hp = 0;
+                                spec->private_imux[0].num_items = 1;
+                                goto again;
+                        }
                         printk(KERN_WARNING "hda_codec: %s: no valid ADC found;"
                                " using fallback 0x%x\n",
                                codec->chip_name, spec->private_adc_nids[0]);
@@ -4113,7 +4116,7 @@ static void alc_remove_invalid_adc_nids(struct hda_codec *codec)
 
         if (spec->auto_mic)
                 alc_auto_mic_check_imux(codec); /* check auto-mic setups */
-        else if (spec->input_mux->num_items == 1)
+        else if (spec->input_mux->num_items == 1 || spec->shared_mic_hp)
                 spec->num_adc_nids = 1; /* reduce to a single ADC */
 }