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authorTakashi Iwai <tiwai@suse.de>2015-02-24 16:59:42 +0300
committerTakashi Iwai <tiwai@suse.de>2015-03-23 15:17:27 +0300
commit3256be6537751f65c76b3ecfbb4e667f87525a2f (patch)
tree8dc85bb89fa5c5c23ebf815e0d4a825a0b9d4367 /include
parent7639a06c23c7d4cda34c2546bd7290d8753849ca (diff)
downloadlinux-3256be6537751f65c76b3ecfbb4e667f87525a2f.tar.xz
ALSA: hda - Add widget sysfs tree
This patch changes the sysfs files assigned to the codec device on the bus which were formerly identical with hwdep sysfs files. Now it shows only a few core parameter, vendor_id, subsystem_id, revision_id, afg, mfg, vendor_name and chip_name. In addition, now a widget tree is added to the bus device sysfs directory for showing the widget topology and attributes. It's just a flat tree consisting of subdirectories named as the widget NID including various attributes like widget capability bits. The AFG (usually NID 0x01) is always found there, and it contains always amp_in_caps, amp_out_caps and power_caps files. Each of these attributes show a single value. The rest are the widget nodes belonging to that AFG. Note that the child node might not start from 0x02 but from another value like 0x0a. Each child node may contain caps, pin_caps, amp_in_caps, amp_out_caps, power_caps and connections files. The caps (representing the widget capability bits) always contain a value. The rest may contain value(s) if the attribute exists on the node. Only connections file show multiple values while other attributes have zero or one single value. An example of ls -R output is like below: % ls -R /sys/bus/hdaudio/devices/hdaudioC0D0/ /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/: 01/ 04/ 07/ 0a/ 0d/ 10/ 13/ 16/ 19/ 1c/ 1f/ 22/ 02/ 05/ 08/ 0b/ 0e/ 11/ 14/ 17/ 1a/ 1d/ 20/ 23/ 03/ 06/ 09/ 0c/ 0f/ 12/ 15/ 18/ 1b/ 1e/ 21/ /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/01: amp_in_caps amp_out_caps power_caps /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/02: amp_in_caps amp_out_caps caps connections pin_caps pin_cfg power_caps /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/03: ..... Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/sound/hdaudio.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index b81b4bec6f05..6ed2b421e29e 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -14,6 +14,7 @@ typedef u16 hda_nid_t;
struct hdac_bus;
struct hdac_device;
struct hdac_driver;
+struct hdac_widget_tree;
/*
* exported bus type
@@ -53,6 +54,9 @@ struct hdac_device {
/* misc flags */
atomic_t in_pm; /* suspend/resume being performed */
+
+ /* sysfs */
+ struct hdac_widget_tree *widgets;
};
/* device/driver type used for matching */
@@ -71,6 +75,8 @@ enum {
int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
const char *name, unsigned int addr);
void snd_hdac_device_exit(struct hdac_device *dev);
+int snd_hdac_device_register(struct hdac_device *codec);
+void snd_hdac_device_unregister(struct hdac_device *codec);
int snd_hdac_refresh_widgets(struct hdac_device *codec);