From 875f0dd79987a63f01c07a9994dbe2c457992e41 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 6 Aug 2014 14:32:56 +0200
Subject: ALSA: hda - Fix parsing of CMI8888 codec

CMI8888 codec chip has a boost amp (only) on the headphone pin, and
this confuses the generic parser, which tends to pick up the most
outside amp.  This results in the wrong volume setup, as the driver
complains like:
  hda_codec: Mismatching dB step for vmaster slave (-100!=1000)

For avoiding this problem, rule out the amp on NID 0x10 and create
"Headphone Amp" volume control manually instead.

Note that this patch still doesn't fix all problems yet.  The sound
output from the line out seems still too low.  It will be fixed in
another patch (hopefully).

Reported-and-tested-by: Vincent Lejeune <vljn@ovi.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_cmedia.c b/sound/pci/hda/patch_cmedia.c
index ed3d133..c895a8f 100644
--- a/sound/pci/hda/patch_cmedia.c
+++ b/sound/pci/hda/patch_cmedia.c
@@ -75,15 +75,62 @@ static int patch_cmi9880(struct hda_codec *codec)
 	return err;
 }
 
+static int patch_cmi8888(struct hda_codec *codec)
+{
+	struct cmi_spec *spec;
+	struct auto_pin_cfg *cfg;
+	int err;
+
+	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
+	if (!spec)
+		return -ENOMEM;
+
+	codec->spec = spec;
+	cfg = &spec->gen.autocfg;
+	snd_hda_gen_spec_init(&spec->gen);
+
+	/* mask NID 0x10 from the playback volume selection;
+	 * it's a headphone boost volume handled manually below
+	 */
+	spec->gen.out_vol_mask = (1ULL << 0x10);
+
+	err = snd_hda_parse_pin_defcfg(codec, cfg, NULL, 0);
+	if (err < 0)
+		goto error;
+	err = snd_hda_gen_parse_auto_config(codec, cfg);
+	if (err < 0)
+		goto error;
+
+	if (get_defcfg_device(snd_hda_codec_get_pincfg(codec, 0x10)) ==
+	    AC_JACK_HP_OUT) {
+		static const struct snd_kcontrol_new amp_kctl =
+			HDA_CODEC_VOLUME("Headphone Amp Playback Volume",
+					 0x10, 0, HDA_OUTPUT);
+		if (!snd_hda_gen_add_kctl(&spec->gen, NULL, &amp_kctl)) {
+			err = -ENOMEM;
+			goto error;
+		}
+	}
+
+	codec->patch_ops = cmi_auto_patch_ops;
+	return 0;
+
+ error:
+	snd_hda_gen_free(codec);
+	return err;
+}
+
 /*
  * patch entries
  */
 static const struct hda_codec_preset snd_hda_preset_cmedia[] = {
+	{ .id = 0x13f68888, .name = "CMI8888", .patch = patch_cmi8888 },
 	{ .id = 0x13f69880, .name = "CMI9880", .patch = patch_cmi9880 },
  	{ .id = 0x434d4980, .name = "CMI9880", .patch = patch_cmi9880 },
 	{} /* terminator */
 };
 
+MODULE_ALIAS("snd-hda-codec-id:13f68888");
 MODULE_ALIAS("snd-hda-codec-id:13f69880");
 MODULE_ALIAS("snd-hda-codec-id:434d4980");
 
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