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: Takashi Iwai <tiwai@suse.de>
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@ -8,6 +8,7 @@ snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o
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# for trace-points
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CFLAGS_hda_codec.o := -I$(src)
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CFLAGS_hda_intel.o := -I$(src)
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snd-hda-codec-realtek-objs := patch_realtek.o
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snd-hda-codec-cmedia-objs := patch_cmedia.o
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@ -527,6 +527,9 @@ struct azx {
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struct list_head list;
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};
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#define CREATE_TRACE_POINTS
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#include "hda_intel_trace.h"
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/* driver types */
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enum {
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AZX_DRIVER_ICH,
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@ -2059,6 +2062,9 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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int rstart = 0, start, nsync = 0, sbits = 0;
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int nwait, timeout;
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azx_dev = get_azx_dev(substream);
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trace_azx_pcm_trigger(chip, azx_dev, cmd);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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rstart = 1;
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@ -2231,6 +2237,7 @@ static unsigned int azx_get_position(struct azx *chip,
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{
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unsigned int pos;
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int stream = azx_dev->substream->stream;
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int delay = 0;
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switch (chip->position_fix[stream]) {
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case POS_FIX_LPIB:
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@ -2264,7 +2271,6 @@ static unsigned int azx_get_position(struct azx *chip,
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chip->position_fix[stream] == POS_FIX_POSBUF &&
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(chip->driver_caps & AZX_DCAPS_COUNT_LPIB_DELAY)) {
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unsigned int lpib_pos = azx_sd_readl(azx_dev, SD_LPIB);
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int delay;
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if (stream == SNDRV_PCM_STREAM_PLAYBACK)
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delay = pos - lpib_pos;
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else
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@ -2279,6 +2285,7 @@ static unsigned int azx_get_position(struct azx *chip,
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azx_dev->substream->runtime->delay =
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bytes_to_frames(azx_dev->substream->runtime, delay);
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}
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trace_azx_get_position(chip, azx_dev, pos, delay);
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return pos;
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}
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62
sound/pci/hda/hda_intel_trace.h
Normal file
62
sound/pci/hda/hda_intel_trace.h
Normal file
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@ -0,0 +1,62 @@
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM hda_intel
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#define TRACE_INCLUDE_FILE hda_intel_trace
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#if !defined(_TRACE_HDA_INTEL_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_HDA_INTEL_H
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#include <linux/tracepoint.h>
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struct azx;
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struct azx_dev;
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TRACE_EVENT(azx_pcm_trigger,
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TP_PROTO(struct azx *chip, struct azx_dev *dev, int cmd),
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TP_ARGS(chip, dev, cmd),
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TP_STRUCT__entry(
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__field( int, card )
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__field( int, idx )
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__field( int, cmd )
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),
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TP_fast_assign(
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__entry->card = (chip)->card->number;
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__entry->idx = (dev)->index;
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__entry->cmd = cmd;
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),
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TP_printk("[%d:%d] cmd=%d", __entry->card, __entry->idx, __entry->cmd)
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);
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TRACE_EVENT(azx_get_position,
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TP_PROTO(struct azx *chip, struct azx_dev *dev, unsigned int pos, unsigned int delay),
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TP_ARGS(chip, dev, pos, delay),
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TP_STRUCT__entry(
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__field( int, card )
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__field( int, idx )
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__field( unsigned int, pos )
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__field( unsigned int, delay )
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),
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TP_fast_assign(
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__entry->card = (chip)->card->number;
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__entry->idx = (dev)->index;
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__entry->pos = pos;
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__entry->delay = delay;
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),
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TP_printk("[%d:%d] pos=%u, delay=%u", __entry->card, __entry->idx, __entry->pos, __entry->delay)
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);
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#endif /* _TRACE_HDA_INTEL_H */
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/* This part must be outside protection */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#include <trace/define_trace.h>
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