ALSA: hda - Add generic pincfg initialization

Added the generic pincfg cache and save/restore functions.
Also introduced the pin-overriding via hwdep sysfs.

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

1 files changed, 66 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 4ae51dc..71039a6 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -109,6 +109,7 @@ static void clear_hwdep_elements(struct hda_codec *codec)
 	for (i = 0; i < codec->hints.used; i++, head++)
 		kfree(*head);
 	snd_array_free(&codec->hints);
+	snd_array_free(&codec->override_pins);
 }
 
 static void hwdep_free(struct snd_hwdep *hwdep)
@@ -141,6 +142,7 @@ int /*__devinit*/ snd_hda_create_hwdep(struct hda_codec *codec)
 
 	snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
 	snd_array_init(&codec->hints, sizeof(char *), 32);
+	snd_array_init(&codec->override_pins, sizeof(struct hda_pincfg), 16);
 
 	return 0;
 }
@@ -316,6 +318,67 @@ static ssize_t hints_store(struct device *dev,
 	return count;
 }
 
+static ssize_t pin_configs_show(struct hda_codec *codec,
+				struct snd_array *list,
+				char *buf)
+{
+	int i, len = 0;
+	for (i = 0; i < list->used; i++) {
+		struct hda_pincfg *pin = snd_array_elem(list, i);
+		len += sprintf(buf + len, "0x%02x 0x%08x\n",
+			       pin->nid, pin->cfg);
+	}
+	return len;
+}
+
+static ssize_t init_pin_configs_show(struct device *dev,
+				     struct device_attribute *attr,
+				     char *buf)
+{
+	struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+	struct hda_codec *codec = hwdep->private_data;
+	return pin_configs_show(codec, &codec->init_pins, buf);
+}
+
+static ssize_t override_pin_configs_show(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+	struct hda_codec *codec = hwdep->private_data;
+	return pin_configs_show(codec, &codec->override_pins, buf);
+}
+
+static ssize_t cur_pin_configs_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+	struct hda_codec *codec = hwdep->private_data;
+	return pin_configs_show(codec, &codec->cur_pins, buf);
+}
+
+#define MAX_PIN_CONFIGS		32
+
+static ssize_t override_pin_configs_store(struct device *dev,
+					  struct device_attribute *attr,
+					  const char *buf, size_t count)
+{
+	struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+	struct hda_codec *codec = hwdep->private_data;
+	int nid, cfg;
+	int err;
+
+	if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
+		return -EINVAL;
+	if (!nid)
+		return -EINVAL;
+	err = snd_hda_add_pincfg(codec, &codec->override_pins, nid, cfg);
+	if (err < 0)
+		return err;
+	return count;
+}
+
 #define CODEC_ATTR_RW(type) \
 	__ATTR(type, 0644, type##_show, type##_store)
 #define CODEC_ATTR_RO(type) \
@@ -333,6 +396,9 @@ static struct device_attribute codec_attrs[] = {
 	CODEC_ATTR_RW(modelname),
 	CODEC_ATTR_WO(init_verbs),
 	CODEC_ATTR_WO(hints),
+	CODEC_ATTR_RO(init_pin_configs),
+	CODEC_ATTR_RW(override_pin_configs),
+	CODEC_ATTR_RO(cur_pin_configs),
 	CODEC_ATTR_WO(reconfig),
 	CODEC_ATTR_WO(clear),
 };