2 files changed, 24 insertions, 9 deletions

diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 2bce925d84ef..03315105c904 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -135,6 +135,7 @@ enum {
 #define AC_PAR_PROC_CAP                 0x10
 #define AC_PAR_GPIO_CAP                 0x11
 #define AC_PAR_AMP_OUT_CAP              0x12
+#define AC_PAR_VOL_KNB_CAP              0x13
 
 /*
  * AC_VERB_PARAMETERS results (32bit)
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c
index 000c6c45011b..7df1d16d1469 100644
--- a/sound/pci/hda/hda_proc.c
+++ b/sound/pci/hda/hda_proc.c
@@ -305,6 +305,12 @@ static void print_codec_info(struct snd_info_entry *entry,
                         snd_iprintf(buffer, " Amp-Out");
                 snd_iprintf(buffer, "\n");
 
+                /* volume knob is a special widget that always have connection
+                 * list
+                 */
+                if (wid_type == AC_WID_VOL_KNB)
+                        wid_caps |= AC_WCAP_CONN_LIST;
+
                 if (wid_caps & AC_WCAP_CONN_LIST)
                         conn_len = snd_hda_get_connections(codec, nid, conn,
                                                            HDA_MAX_CONNECTIONS);
@@ -340,9 +346,15 @@ static void print_codec_info(struct snd_info_entry *entry,
                         snd_iprintf(buffer, "\n");
                         break;
                 case AC_WID_VOL_KNB:
-                        snd_iprintf(buffer, "  Volume-Knob: 0x%x\n",
-                                    snd_hda_codec_read(codec, nid, 0,
-                                        AC_VERB_GET_VOLUME_KNOB_CONTROL, 0));
+                        pinctls = snd_hda_param_read(codec, nid,
+                                                     AC_PAR_VOL_KNB_CAP);
+                        snd_iprintf(buffer, "  Volume-Knob: delta=%d, "
+                                    "steps=%d, ",
+                                    (pinctls >> 7) & 1, pinctls & 0x7f);
+                        pinctls = snd_hda_codec_read(codec, nid, 0,
+                                        AC_VERB_GET_VOLUME_KNOB_CONTROL, 0);
+                        snd_iprintf(buffer, "direct=%d, val=%d\n",
+                                    (pinctls >> 7) & 1, pinctls & 0x7f);
                         break;
                 case AC_WID_AUD_OUT:
                 case AC_WID_AUD_IN:
@@ -365,13 +377,15 @@ static void print_codec_info(struct snd_info_entry *entry,
                                 curr = snd_hda_codec_read(codec, nid, 0,
                                         AC_VERB_GET_CONNECT_SEL, 0);
                         snd_iprintf(buffer, "  Connection: %d\n", conn_len);
-                        snd_iprintf(buffer, "    ");
-                        for (c = 0; c < conn_len; c++) {
-                                snd_iprintf(buffer, " 0x%02x", conn[c]);
-                                if (c == curr)
-                                        snd_iprintf(buffer, "*");
+                        if (conn_len > 0) {
+                                snd_iprintf(buffer, "    ");
+                                for (c = 0; c < conn_len; c++) {
+                                        snd_iprintf(buffer, " 0x%02x", conn[c]);
+                                        if (c == curr)
+                                                snd_iprintf(buffer, "*");
+                                }
+                                snd_iprintf(buffer, "\n");
                         }
-                        snd_iprintf(buffer, "\n");
                 }
         }
         snd_hda_power_down(codec);