[PATCH 5.4.y] ALSA: hda - Disable audio component for legacy Nvidia HDMI codecs

[Takashi Iwai <tiwai@suse.de>]

commit 5a858e79c911330678b5a9be91a24830e94a0dc9 upstream.

The old Nvidia chips have multiple HD-audio codecs on the same
HD-audio controller, and this doesn't work as expected with the current
audio component binding that is implemented under the one-codec-per-
controller assumption; at the probe time, the driver leads to several
kernel WARNING messages.

For the proper support, we may change the pin2port and port2pin to
traverse the codec list per the given pin number, but this needs more
development and testing.

As a quick workaround, instead, this patch drops the binding in the
audio side for these legacy chips since the audio component support in
nouveau graphics driver is still not merged (hence it's basically
unused).

[ Unlike the original subject line, this patch actually disables the
  audio component binding for all Nvidia chips on 5.4.y, not only for
  legacy chips, but it doesn't matter much; nouveau gfx driver still
  doesn't provide the audio component binding, so it's only a
  placeholder on 5.4.y -- tiwai ]

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=205625
Fixes: ade49db337a9 ("ALSA: hda/hdmi - Allow audio component for AMD/ATI and Nvidia HDMI")
Link: https://lore.kernel.org/r/20191122132000.4460-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_hdmi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 78bd2e3722c7..cdacc52a5147 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -3492,8 +3492,6 @@ static int patch_nvhdmi(struct hda_codec *codec)
 
 	codec->link_down_at_suspend = 1;
 
-	generic_acomp_init(codec, &nvhdmi_audio_ops, nvhdmi_port2pin);
-
 	return 0;
 }
 
-- 
2.16.4