ALSA: intelhdmi - accept DisplayPort pin

HDA036 spec states:
  DP (Display Port) indicates whether the Pin Complex Widget supports
  connection to a Display Port sink.  Supported if set to 1. Note that
  it is possible for the pin widget to support more than one digital
  display connection type, e.g. HDMI and DP bit are both set to 1.

Also export the DP pin cap in procfs.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 6 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index f9a084a1378e..9000d52fccca 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -255,6 +255,9 @@ enum {
  *       in HD-audio specification
  */
 #define AC_PINCAP_HDMI                  (1<<7)  /* HDMI pin */
+#define AC_PINCAP_DP                    (1<<24) /* DisplayPort pin, can
+                                                 * coexist with AC_PINCAP_HDMI
+                                                 */
 #define AC_PINCAP_VREF                  (0x37<<8)
 #define AC_PINCAP_VREF_SHIFT            8
 #define AC_PINCAP_EAPD                  (1<<16) /* EAPD capable */
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c
index 8d381c891001..c9afc04adac8 100644
--- a/sound/pci/hda/hda_proc.c
+++ b/sound/pci/hda/hda_proc.c
@@ -246,6 +246,8 @@ static void print_pin_caps(struct snd_info_buffer *buffer,
                         snd_iprintf(buffer, " HDMI");
                 }
         }
+        if (caps & AC_PINCAP_DP)
+                snd_iprintf(buffer, " DP");
         if (caps & AC_PINCAP_TRIG_REQ)
                 snd_iprintf(buffer, " Trigger");
         if (caps & AC_PINCAP_IMP_SENSE)
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index 928df59be5d8..742f15eb3331 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -344,7 +344,7 @@ static int intel_hdmi_parse_codec(struct hda_codec *codec)
                         break;
                 case AC_WID_PIN:
                         caps = snd_hda_param_read(codec, nid, AC_PAR_PIN_CAP);
-                        if (!(caps & AC_PINCAP_HDMI))
+                        if (!(caps & (AC_PINCAP_HDMI | AC_PINCAP_DP)))
                                 continue;
                         if (intel_hdmi_add_pin(codec, nid) < 0)
                                 return -EINVAL;