SNDRV_CHMAP_TFC 412 sound/hda/hdmi_chmap.c { SNDRV_CHMAP_TFC, FCH }, SNDRV_CHMAP_TFC 271 sound/usb/stream.c SNDRV_CHMAP_TFC, /* top front center */ SNDRV_CHMAP_TFC 413 sound/usb/stream.c map = SNDRV_CHMAP_TFC;