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authorTakashi Iwai <tiwai@suse.de>2018-06-27 10:03:51 +0300
committerTakashi Iwai <tiwai@suse.de>2018-06-28 01:02:59 +0300
commitfeb20faec73ba0b30f949d54c4153cf0ad3807c8 (patch)
treea08d7c490354e90352bbec2fe863132e9fe002b2 /include/sound
parentc288248f5b26cd5563112fcdc077bf44964a942d (diff)
downloadlinux-feb20faec73ba0b30f949d54c4153cf0ad3807c8.tar.xz
ALSA: hda - Move in_pm accessors to HDA core
The in_pm atomic in hdac_device is an important field used as a flag as well as a refcount for PM. The existing snd_hdac_power_up/down helpers already refer to it in the HD-audio core code, while the code to actually setting the value (atomic_inc() / _dec()) is open-coded in HDA legacy side, which is hard to find. This patch adds the helper functions to set/reset the in_pm counter to HDA core and use them in HDA legacy side, for making it clearer who / where the PM is managed. There is no functional changes, just code refactoring. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/hdaudio.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index c052afc27547..294a5a21937b 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -8,6 +8,7 @@
#include <linux/device.h>
#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
#include <linux/timecounter.h>
#include <sound/core.h>
#include <sound/memalloc.h>
@@ -171,12 +172,38 @@ int snd_hdac_power_down(struct hdac_device *codec);
int snd_hdac_power_up_pm(struct hdac_device *codec);
int snd_hdac_power_down_pm(struct hdac_device *codec);
int snd_hdac_keep_power_up(struct hdac_device *codec);
+
+/* call this at entering into suspend/resume callbacks in codec driver */
+static inline void snd_hdac_enter_pm(struct hdac_device *codec)
+{
+ atomic_inc(&codec->in_pm);
+}
+
+/* call this at leaving from suspend/resume callbacks in codec driver */
+static inline void snd_hdac_leave_pm(struct hdac_device *codec)
+{
+ atomic_dec(&codec->in_pm);
+}
+
+static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
+{
+ return atomic_read(&codec->in_pm);
+}
+
+static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
+{
+ return !pm_runtime_suspended(&codec->dev);
+}
#else
static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
+static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
+static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
+static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return 0; }
+static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return 1; }
#endif
/*