[ALSA] hda-codec - Add workaround for multiple HPs

Dell laptops have multiple HP jacks that can be used for multi-channel
outputs.  The current auto pincfg handles the speaker as the primary
output and thus cannot handle the multi-channel configuration for such
cases.  This patch adds a workaround to fix this issue by swapping the
HP and speaker during multi-channel setup routines.

Signed-off-by: Jiang Zhe <zhe.jiang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 32 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index e02d3bac2096..992568368ef4 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -2135,6 +2135,7 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
 {
         struct sigmatel_spec *spec = codec->spec;
         int err;
+        int hp_speaker_swap = 0;
 
         if ((err = snd_hda_parse_pin_def_config(codec,
                                                 &spec->autocfg,
@@ -2143,6 +2144,24 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
         if (! spec->autocfg.line_outs)
                 return 0; /* can't find valid pin config */
 
+        /* If we have no real line-out pin and multiple hp-outs, HPs should
+         * be set up as multi-channel outputs.
+         */
+        if (spec->autocfg.line_out_type == AUTO_PIN_SPEAKER_OUT &&
+            spec->autocfg.hp_outs > 1) {
+                /* Copy hp_outs to line_outs, backup line_outs in
+                 * speaker_outs so that the following routines can handle
+                 * HP pins as primary outputs.
+                 */
+                memcpy(spec->autocfg.speaker_pins, spec->autocfg.line_out_pins,
+                       sizeof(spec->autocfg.line_out_pins));
+                spec->autocfg.speaker_outs = spec->autocfg.line_outs;
+                memcpy(spec->autocfg.line_out_pins, spec->autocfg.hp_pins,
+                       sizeof(spec->autocfg.hp_pins));
+                spec->autocfg.line_outs = spec->autocfg.hp_outs;
+                hp_speaker_swap = 1;
+        }
+
         if ((err = stac92xx_add_dyn_out_pins(codec, &spec->autocfg)) < 0)
                 return err;
         if (spec->multiout.num_dacs == 0)
@@ -2154,6 +2173,19 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
         if (err < 0)
                 return err;
 
+        if (hp_speaker_swap == 1) {
+                /* Restore the hp_outs and line_outs */
+                memcpy(spec->autocfg.hp_pins, spec->autocfg.line_out_pins,
+                       sizeof(spec->autocfg.line_out_pins));
+                spec->autocfg.hp_outs = spec->autocfg.line_outs;
+                memcpy(spec->autocfg.line_out_pins, spec->autocfg.speaker_pins,
+                       sizeof(spec->autocfg.speaker_pins));
+                spec->autocfg.line_outs = spec->autocfg.speaker_outs;
+                memset(spec->autocfg.speaker_pins, 0,
+                       sizeof(spec->autocfg.speaker_pins));
+                spec->autocfg.speaker_outs = 0;
+        }
+
         err = stac92xx_auto_create_hp_ctls(codec, &spec->autocfg);
 
         if (err < 0)