Fix oinkmaster patch.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.drivers / alsa-hda-seek-for-codec-id

From 2eda344546caaf9168e778a4007f4609e95106e0 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab@infradead.org>
Date: Mon, 11 Aug 2008 10:18:39 +0200
Subject: ALSA: hda - Add a new function to seek for a codec ID
Patch-mainline: 2.6.29-rc1
References: bnc#460478

Gateway notebooks have their ID inside codec vendor ID, not at PCI ID. Due to
that, model auto-detection were not possible with the standard seek method.

This is what is found at lspci -vnn:

00:14.2 Audio device [0403]: ATI Technologies Inc SB450 HDA Audio [1002:437b] (rev 01)
        Subsystem: ATI Technologies Inc SB450 HDA Audio [1002:437b]

Yet, autodetection is possible, since the codec properly reflects the vendor at
the Subsystem ID:

$ cat /proc/asound/card0/codec#0 |head -4

Codec: SigmaTel STAC9250
Address: 0
Vendor Id: 0x83847634
Subsystem Id: 0x107b0367

This patch adds a new autodetection function that seeks for codec subsystem ID.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/pci/hda/hda_codec.c |   60 +++++++++++++++++++++++++++++++++++++++++++++
 sound/pci/hda/hda_local.h |    3 ++
 2 files changed, 63 insertions(+), 0 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 0043448..9c1af01 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2364,6 +2364,66 @@ int snd_hda_check_board_config(struct hd
 }
 
 /**
+ * snd_hda_check_board_codec_sid_config - compare the current codec
+				          subsystem ID with the
+					  config table
+
+	   This is important for Gateway notebooks with SB450 HDA Audio
+	   where the vendor ID of the PCI device is:
+		ATI Technologies Inc SB450 HDA Audio [1002:437b]
+	   and the vendor/subvendor are found only at the codec.
+
+ * @codec: the HDA codec
+ * @num_configs: number of config enums
+ * @models: array of model name strings
+ * @tbl: configuration table, terminated by null entries
+ *
+ * Compares the modelname or PCI subsystem id of the current codec with the
+ * given configuration table.  If a matching entry is found, returns its
+ * config value (supposed to be 0 or positive).
+ *
+ * If no entries are matching, the function returns a negative value.
+ */
+int snd_hda_check_board_codec_sid_config(struct hda_codec *codec,
+			       int num_configs, const char **models,
+			       const struct snd_pci_quirk *tbl)
+{
+	const struct snd_pci_quirk *q;
+
+	/* Search for codec ID */
+	for (q = tbl; q->subvendor; q++) {
+		unsigned long vendorid = (q->subdevice) | (q->subvendor << 16);
+
+		if (vendorid == codec->subsystem_id)
+			break;
+	}
+
+	if (!q->subvendor)
+		return -1;
+
+	tbl = q;
+
+	if (tbl->value >= 0 && tbl->value < num_configs) {
+#ifdef CONFIG_SND_DEBUG_DETECT
+		char tmp[10];
+		const char *model = NULL;
+		if (models)
+			model = models[tbl->value];
+		if (!model) {
+			sprintf(tmp, "#%d", tbl->value);
+			model = tmp;
+		}
+		snd_printdd(KERN_INFO "hda_codec: model '%s' is selected "
+			    "for config %x:%x (%s)\n",
+			    model, tbl->subvendor, tbl->subdevice,
+			    (tbl->name ? tbl->name : "Unknown device"));
+#endif
+		return tbl->value;
+	}
+	return -1;
+}
+
+/**
  * snd_hda_add_new_ctls - create controls from the array
  * @codec: the HDA codec
  * @knew: the array of struct snd_kcontrol_new
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 6f2fe0f..1dd8716 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -288,6 +288,9 @@ static inline int snd_hda_codec_proc_new
 int snd_hda_check_board_config(struct hda_codec *codec, int num_configs,
 			       const char **modelnames,
 			       const struct snd_pci_quirk *pci_list);
+int snd_hda_check_board_codec_sid_config(struct hda_codec *codec,
+                               int num_configs, const char **models,
+                               const struct snd_pci_quirk *tbl);
 int snd_hda_add_new_ctls(struct hda_codec *codec,
 			 struct snd_kcontrol_new *knew);
 
-- 
1.6.1