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Commit 1a8506d4 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Add tracepoints to HD-audio controller driver 



Add a couple of tracepoints to snd-hda-intel for tracing the position
and the trigger timings.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 4ee3bffc

sound/pci/hda/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o 


# for trace-points

CFLAGS_hda_codec.o := -I$(src)

CFLAGS_hda_intel.o := -I$(src)



snd-hda-codec-realtek-objs :=	patch_realtek.o

snd-hda-codec-cmedia-objs :=	patch_cmedia.o

sound/pci/hda/hda_intel.c

+8 −1
Original line number Diff line number Diff line
@@ -527,6 +527,9 @@ struct azx { 
	struct list_head list;

};



#define CREATE_TRACE_POINTS

#include "hda_intel_trace.h"



/* driver types */

enum {

	AZX_DRIVER_ICH,
@@ -2059,6 +2062,9 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 
	int rstart = 0, start, nsync = 0, sbits = 0;

	int nwait, timeout;



	azx_dev = get_azx_dev(substream);

	trace_azx_pcm_trigger(chip, azx_dev, cmd);



	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

		rstart = 1;
@@ -2231,6 +2237,7 @@ static unsigned int azx_get_position(struct azx *chip, 
{

	unsigned int pos;

	int stream = azx_dev->substream->stream;

	int delay = 0;



	switch (chip->position_fix[stream]) {

	case POS_FIX_LPIB:
@@ -2264,7 +2271,6 @@ static unsigned int azx_get_position(struct azx *chip, 
	    chip->position_fix[stream] == POS_FIX_POSBUF &&

	    (chip->driver_caps & AZX_DCAPS_COUNT_LPIB_DELAY)) {

		unsigned int lpib_pos = azx_sd_readl(azx_dev, SD_LPIB);

		int delay;

		if (stream == SNDRV_PCM_STREAM_PLAYBACK)

			delay = pos - lpib_pos;

		else
@@ -2279,6 +2285,7 @@ static unsigned int azx_get_position(struct azx *chip, 
		azx_dev->substream->runtime->delay =

			bytes_to_frames(azx_dev->substream->runtime, delay);

	}

	trace_azx_get_position(chip, azx_dev, pos, delay);

	return pos;

}

sound/pci/hda/hda_intel_trace.h

0 → 100644
+62 −0
Original line number Diff line number Diff line 
#undef TRACE_SYSTEM

#define TRACE_SYSTEM hda_intel

#define TRACE_INCLUDE_FILE hda_intel_trace



#if !defined(_TRACE_HDA_INTEL_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_HDA_INTEL_H



#include <linux/tracepoint.h>



struct azx;

struct azx_dev;



TRACE_EVENT(azx_pcm_trigger,



	TP_PROTO(struct azx *chip, struct azx_dev *dev, int cmd),



	TP_ARGS(chip, dev, cmd),



	TP_STRUCT__entry(

		__field( int, card )

		__field( int, idx )

		__field( int, cmd )

	),



	TP_fast_assign(

		__entry->card = (chip)->card->number;

		__entry->idx = (dev)->index;

		__entry->cmd = cmd;

	),



	TP_printk("[%d:%d] cmd=%d", __entry->card, __entry->idx, __entry->cmd)

);



TRACE_EVENT(azx_get_position,



    TP_PROTO(struct azx *chip, struct azx_dev *dev, unsigned int pos, unsigned int delay),



	    TP_ARGS(chip, dev, pos, delay),



	TP_STRUCT__entry(

		__field( int, card )

		__field( int, idx )

		__field( unsigned int, pos )

		__field( unsigned int, delay )

	),



	TP_fast_assign(

		__entry->card = (chip)->card->number;

		__entry->idx = (dev)->index;

		__entry->pos = pos;

		__entry->delay = delay;

	),



	TP_printk("[%d:%d] pos=%u, delay=%u", __entry->card, __entry->idx, __entry->pos, __entry->delay)

);



#endif /* _TRACE_HDA_INTEL_H */



/* This part must be outside protection */

#undef TRACE_INCLUDE_PATH

#define TRACE_INCLUDE_PATH .

#include <trace/define_trace.h>