ALSA: hda: Input port AMP controls

Added support for controlling hardware gain amps on input ports
using a volume control mixer with a mux selecting the port being controlled.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 5c9e578f7f2d..d688f50cdfce 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -418,4 +418,13 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec,
                                  hda_nid_t nid);
 #endif /* CONFIG_SND_HDA_POWER_SAVE */
 
+/*
+ * AMP control callbacks
+ */
+/* retrieve parameters from private_value */
+#define get_amp_nid(kc)         ((kc)->private_value & 0xffff)
+#define get_amp_channels(kc)    (((kc)->private_value >> 16) & 0x3)
+#define get_amp_direction(kc)   (((kc)->private_value >> 18) & 0x1)
+#define get_amp_index(kc)       (((kc)->private_value >> 19) & 0xf)
+
 #endif /* __SOUND_HDA_LOCAL_H */