ALSA: hda - Fix missing CA initialization for HDMI/DP

The commit 53d7d69d8ffdfa60c5b66cc2e9ee0774aaaef5c0
    ALSA: hdmi - support infoframe for DisplayPort
dropped the initialization of CA field accidentally.
This resulted in only two-channel LPCM mode on Nvidia machines.

Reference: kernel bug 28592
	https://bugzilla.kernel.org/show_bug.cgi?id=28592

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

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 2d5b83fa8d24..a58767736727 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -642,6 +642,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, hda_nid_t nid,
                         hdmi_ai->ver            = 0x01;
                         hdmi_ai->len            = 0x0a;
                         hdmi_ai->CC02_CT47      = channels - 1;
+                        hdmi_ai->CA             = ca;
                         hdmi_checksum_audio_infoframe(hdmi_ai);
                 } else if (spec->sink_eld[i].conn_type == 1) { /* DisplayPort */
                         struct dp_audio_infoframe *dp_ai;
@@ -651,6 +652,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, hda_nid_t nid,
                         dp_ai->len              = 0x1b;
                         dp_ai->ver              = 0x11 << 2;
                         dp_ai->CC02_CT47        = channels - 1;
+                        dp_ai->CA               = ca;
                 } else {
                         snd_printd("HDMI: unknown connection type at pin %d\n",
                                    pin_nid);