ALSA: hda - Update documentation

Update documentation regarding codec probing; the new probe_only option
and the new probe_mask usage.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 841a9365d5fd..012afd7afb13 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -757,6 +757,9 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     model       - force the model name
     position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF)
     probe_mask  - Bitmask to probe codecs (default = -1, meaning all slots)
+                  When the bit 8 (0x100) is set, the lower 8 bits are used
+                  as the "fixed" codec slots; i.e. the driver probes the
+                  slots regardless what hardware reports back
     probe_only  - Only probing and no codec initialization (default=off);
                   Useful to check the initial codec status for debugging
     bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.