ALSA: hda - Add support for HDMI HBR passthrough

Passing IEC 61937 encapsulated compressed audio at bitrates over 6.144
Mbps (i.e. more than a single 2-channel 16-bit 192kHz IEC 60958 link)
over HDMI requires the use of HBR Audio Stream Packets instead of Audio
Sample Packets.

Enable HBR mode when the stream has 8 channels and the Non-PCM bit is
set.

If the audio converter is not connected to any HBR-capable pins, return
-EINVAL in prepare().

Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 4797416aa3d9..48b33671e727 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -364,6 +364,9 @@ enum {
 #define AC_DIG2_CC                      (0x7f<<0)
 
 /* Pin widget control - 8bit */
+#define AC_PINCTL_EPT                   (0x3<<0)
+#define AC_PINCTL_EPT_NATIVE            0
+#define AC_PINCTL_EPT_HBR               3
 #define AC_PINCTL_VREFEN                (0x7<<0)
 #define AC_PINCTL_VREF_HIZ              0       /* Hi-Z */
 #define AC_PINCTL_VREF_50               1       /* 50% */