linux-kernel - [PATCH 3.5 09/60] ALSA: hda - Improve loopback path lookups for AD1983

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Message-Id: <1392987687-15367-10-git-send-email-luis.henriques@canonical.com>
Date:	Fri, 21 Feb 2014 13:00:36 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Takashi Iwai <tiwai@...e.de>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.5 09/60] ALSA: hda - Improve loopback path lookups for AD1983

3.5.7.31 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@...e.de>

commit 276ab336b4c6e483d12fd46cbf24f97f71867710 upstream.

AD1983 has flexible loopback routes and the generic parser would take
wrong path confusingly instead of taking individual paths via NID 0x0c
and 0x0d.  For avoiding it, limit the connections at these widgets so
that the parser can think more straightforwardly.  This fixes the
regression of the missing line-in loopback on Dell machine.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=70011
Signed-off-by: Takashi Iwai <tiwai@...e.de>
[ luis: backported to 3.5: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 sound/pci/hda/patch_analog.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/pci/hda/patch_analog.c b/sound/pci/hda/patch_analog.c
index b1180b5..65e0494 100644
--- a/sound/pci/hda/patch_analog.c
+++ b/sound/pci/hda/patch_analog.c
@@ -3575,6 +3575,8 @@ static const char * const ad1884_slave_vols[] = {
 static int patch_ad1884(struct hda_codec *codec)
 {
 	struct ad198x_spec *spec;
+	static hda_nid_t conn_0c[] = { 0x08 };
+	static hda_nid_t conn_0d[] = { 0x09 };
 	int err;
 
 	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
@@ -3590,6 +3592,10 @@ static int patch_ad1884(struct hda_codec *codec)
 	}
 	set_beep_amp(spec, 0x10, 0, HDA_OUTPUT);
 
+	/* limit the loopback routes not to confuse the parser */
+	snd_hda_override_conn_list(codec, 0x0c, ARRAY_SIZE(conn_0c), conn_0c);
+	snd_hda_override_conn_list(codec, 0x0d, ARRAY_SIZE(conn_0d), conn_0d);
+
 	spec->multiout.max_channels = 2;
 	spec->multiout.num_dacs = ARRAY_SIZE(ad1884_dac_nids);
 	spec->multiout.dac_nids = ad1884_dac_nids;
-- 
1.9.0

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