ALSA: hda - Keep EAPD turned on for old Conexant chips

In the old Conexant chips (5045, 5047, 5051 and 5066), a single EAPD
may handle both headphone and speaker outputs while it's assigned only
to one of them.  Turning off dynamically leads to the unexpected silent
output in such a configuration with the auto-mute function.

Since it's difficult to know how the EAPD is handled in the actual h/w
implementation, better to keep EAPD on while running for such codecs.

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

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index 686ec6d75c6466b248f67fa66f9fc37a73f5f3db..1d69a3e0ce2ca743f645c0cd1056cfb5802be8a9 100644 (file)
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -136,6 +136,7 @@ struct conexant_spec {
        unsigned int thinkpad:1;
        unsigned int hp_laptop:1;
        unsigned int asus:1;
+       unsigned int pin_eapd_ctrls:1;
 
        unsigned int adc_switching:1;
 
@@ -3430,12 +3431,14 @@ static void cx_auto_turn_eapd(struct hda_codec *codec, int num_pins,
 static void do_automute(struct hda_codec *codec, int num_pins,
                        hda_nid_t *pins, bool on)
 {
+       struct conexant_spec *spec = codec->spec;
        int i;
        for (i = 0; i < num_pins; i++)
                snd_hda_codec_write(codec, pins[i], 0,
                                    AC_VERB_SET_PIN_WIDGET_CONTROL,
                                    on ? PIN_OUT : 0);
-       cx_auto_turn_eapd(codec, num_pins, pins, on);
+       if (spec->pin_eapd_ctrls)
+               cx_auto_turn_eapd(codec, num_pins, pins, on);
 }
 
 static int detect_jacks(struct hda_codec *codec, int num_pins, hda_nid_t *pins)
@@ -3460,9 +3463,12 @@ static void cx_auto_update_speakers(struct hda_codec *codec)
        int on = 1;
 
        /* turn on HP EAPD when HP jacks are present */
-       if (spec->auto_mute)
-               on = spec->hp_present;
-       cx_auto_turn_eapd(codec, cfg->hp_outs, cfg->hp_pins, on);
+       if (spec->pin_eapd_ctrls) {
+               if (spec->auto_mute)
+                       on = spec->hp_present;
+               cx_auto_turn_eapd(codec, cfg->hp_outs, cfg->hp_pins, on);
+       }
+
        /* mute speakers in auto-mode if HP or LO jacks are plugged */
        if (spec->auto_mute)
                on = !(spec->hp_present ||
@@ -3889,20 +3895,10 @@ static void cx_auto_parse_beep(struct hda_codec *codec)
 #define cx_auto_parse_beep(codec)
 #endif
 
-static bool found_in_nid_list(hda_nid_t nid, const hda_nid_t *list, int nums)
-{
-       int i;
-       for (i = 0; i < nums; i++)
-               if (list[i] == nid)
-                       return true;
-       return false;
-}
-
-/* parse extra-EAPD that aren't assigned to any pins */
+/* parse EAPDs */
 static void cx_auto_parse_eapd(struct hda_codec *codec)
 {
        struct conexant_spec *spec = codec->spec;
-       struct auto_pin_cfg *cfg = &spec->autocfg;
        hda_nid_t nid, end_nid;
 
        end_nid = codec->start_nid + codec->num_nodes;
@@ -3911,14 +3907,18 @@ static void cx_auto_parse_eapd(struct hda_codec *codec)
                        continue;
                if (!(snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_EAPD))
                        continue;
-               if (found_in_nid_list(nid, cfg->line_out_pins, cfg->line_outs) ||
-                   found_in_nid_list(nid, cfg->hp_pins, cfg->hp_outs) ||
-                   found_in_nid_list(nid, cfg->speaker_pins, cfg->speaker_outs))
-                       continue;
                spec->eapds[spec->num_eapds++] = nid;
                if (spec->num_eapds >= ARRAY_SIZE(spec->eapds))
                        break;
        }
+
+       /* NOTE: below is a wild guess; if we have more than two EAPDs,
+        * it's a new chip, where EAPDs are supposed to be associated to
+        * pins, and we can control EAPD per pin.
+        * OTOH, if only one or two EAPDs are found, it's an old chip,
+        * thus it might control over all pins.
+        */
+       spec->pin_eapd_ctrls = spec->num_eapds > 2;
 }
 
 static int cx_auto_parse_auto_config(struct hda_codec *codec)
@@ -4024,8 +4024,9 @@ static void cx_auto_init_output(struct hda_codec *codec)
                }
        }
        cx_auto_update_speakers(codec);
-       /* turn on/off extra EAPDs, too */
-       cx_auto_turn_eapd(codec, spec->num_eapds, spec->eapds, true);
+       /* turn on all EAPDs if no individual EAPD control is available */
+       if (!spec->pin_eapd_ctrls)
+               cx_auto_turn_eapd(codec, spec->num_eapds, spec->eapds, true);
 }
 
 static void cx_auto_init_input(struct hda_codec *codec)