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authorMengdong Lin <mengdong.lin@intel.com>2015-04-29 12:43:20 +0300
committerTakashi Iwai <tiwai@suse.de>2015-04-29 13:27:52 +0300
commita5e7e07c264bb76d0b7c782766989c491833de05 (patch)
tree35cd2d573347f42a479f65079d17cb9562fd3f4d /include/sound/hdaudio.h
parentd4b7b13e19258a848da920502e27526f36c5a59d (diff)
downloadlinux-a5e7e07c264bb76d0b7c782766989c491833de05.tar.xz
ALSA: hda - allow a codec to control the link power
A flag "link_power_control" is added to indicate whether a codec needs to control the link power. And a new bus ops link_power() is defined for the codec to request to enable/disable the link power. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/hdaudio.h')
-rw-r--r--include/sound/hdaudio.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 6a2e030c836c..b97c59eab7ab 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -74,6 +74,7 @@ struct hdac_device {
/* misc flags */
atomic_t in_pm; /* suspend/resume being performed */
+ bool link_power_control:1;
/* sysfs */
struct hdac_widget_tree *widgets;
@@ -184,6 +185,8 @@ struct hdac_bus_ops {
/* get a response from the last command */
int (*get_response)(struct hdac_bus *bus, unsigned int addr,
unsigned int *res);
+ /* control the link power */
+ int (*link_power)(struct hdac_bus *bus, bool enable);
};
/*
@@ -311,6 +314,7 @@ static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
unsigned int *res);
+int snd_hdac_link_power(struct hdac_device *codec, bool enable);
bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
void snd_hdac_bus_stop_chip(struct hdac_bus *bus);