linux/sound/pci/hda/hda_trace.h
Takashi Iwai cc72da7d4d ALSA: hda - Use standard runtime PM for codec power-save control
Like the previous transition of suspend/resume, now move the
power-save code to the standard runtime PM.  As usual for runtime PM,
it's a bit tricky, but this simplified codes a lot in the end.

For keeping the usage compatibility, power_save module option still
controls the whole power-saving behavior on all codecs.  The value is
translated to pm_runtime_*_autosuspend() and pm_runtime_allow() /
pm_runtime_forbid() calls.

snd_hda_power_up() and snd_hda_power_down() are translated to
pm_runtime_get_sync() and pm_runtime_put_autosuspend(), respectively.
Since we can do call pm_runtime_get_sync() more reliably, the sync
version is used always and snd_hda_power_up_d3wait() is dropped.
Another slight difference is that snd_hda_power_up()/down() don't call
runtime_pm code during the suspend/resume transition phase.  Calling
them there isn't safe unlike our own code, resulted in unexpected
behavior (endless wakeups).

The hda_power_count tracepoint was removed, as it doesn't match well
with the new code.

Last but not least, we need to set ignore_children flag in the parent
dev.power field so that the runtime PM of the controller chip won't
get confused.  The notification is still done in the bus pm_notify
callback.  We'll get rid of this hack in the later patch.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-23 09:16:07 +01:00

120 lines
2.2 KiB
C

#undef TRACE_SYSTEM
#define TRACE_SYSTEM hda
#define TRACE_INCLUDE_FILE hda_trace
#if !defined(_TRACE_HDA_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HDA_H
#include <linux/tracepoint.h>
struct hda_bus;
struct hda_codec;
DECLARE_EVENT_CLASS(hda_cmd,
TP_PROTO(struct hda_codec *codec, unsigned int val),
TP_ARGS(codec, val),
TP_STRUCT__entry(
__field( unsigned int, card )
__field( unsigned int, addr )
__field( unsigned int, val )
),
TP_fast_assign(
__entry->card = (codec)->bus->card->number;
__entry->addr = (codec)->addr;
__entry->val = (val);
),
TP_printk("[%d:%d] val=%x", __entry->card, __entry->addr, __entry->val)
);
DEFINE_EVENT(hda_cmd, hda_send_cmd,
TP_PROTO(struct hda_codec *codec, unsigned int val),
TP_ARGS(codec, val)
);
DEFINE_EVENT(hda_cmd, hda_get_response,
TP_PROTO(struct hda_codec *codec, unsigned int val),
TP_ARGS(codec, val)
);
TRACE_EVENT(hda_bus_reset,
TP_PROTO(struct hda_bus *bus),
TP_ARGS(bus),
TP_STRUCT__entry(
__field( unsigned int, card )
),
TP_fast_assign(
__entry->card = (bus)->card->number;
),
TP_printk("[%d]", __entry->card)
);
#ifdef CONFIG_PM
DECLARE_EVENT_CLASS(hda_power,
TP_PROTO(struct hda_codec *codec),
TP_ARGS(codec),
TP_STRUCT__entry(
__field( unsigned int, card )
__field( unsigned int, addr )
),
TP_fast_assign(
__entry->card = (codec)->bus->card->number;
__entry->addr = (codec)->addr;
),
TP_printk("[%d:%d]", __entry->card, __entry->addr)
);
DEFINE_EVENT(hda_power, hda_power_down,
TP_PROTO(struct hda_codec *codec),
TP_ARGS(codec)
);
DEFINE_EVENT(hda_power, hda_power_up,
TP_PROTO(struct hda_codec *codec),
TP_ARGS(codec)
);
#endif /* CONFIG_PM */
TRACE_EVENT(hda_unsol_event,
TP_PROTO(struct hda_bus *bus, u32 res, u32 res_ex),
TP_ARGS(bus, res, res_ex),
TP_STRUCT__entry(
__field( unsigned int, card )
__field( u32, res )
__field( u32, res_ex )
),
TP_fast_assign(
__entry->card = (bus)->card->number;
__entry->res = res;
__entry->res_ex = res_ex;
),
TP_printk("[%d] res=%x, res_ex=%x", __entry->card,
__entry->res, __entry->res_ex)
);
#endif /* _TRACE_HDA_H */
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#include <trace/define_trace.h>