Add pause push/release support to the virtual PCM test driver. Add 'suspend' boolean field to the pcmtst_buf_iter structure, so we can pause the timer without shutting it down. Update the trigger callback handler correspondingly. Extract buffer initialization to the 'reset_buf_iterator' function since it is used in multiple places now.

Signed-off-by: Ivan Orlov ivan.orlov0322@gmail.com --- sound/drivers/pcmtest.c | 49 ++++++++++++++++++++++++++++++++++------- 1 file changed, 41 insertions(+), 8 deletions(-)

diff --git a/sound/drivers/pcmtest.c b/sound/drivers/pcmtest.c index 27cbb9d38f08..b59b78a09224 100644 --- a/sound/drivers/pcmtest.c +++ b/sound/drivers/pcmtest.c @@ -108,6 +108,7 @@ struct pcmtst_buf_iter { size_t total_bytes; // Total bytes read/written size_t chan_block; // Bytes in one channel buffer when non-interleaved struct snd_pcm_substream *substream; + bool suspend; // We need to pause timer without shutting it down struct timer_list timer_instance; };

@@ -115,7 +116,8 @@ static struct snd_pcm_hardware snd_pcmtst_hw = { .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_NONINTERLEAVED | - SNDRV_PCM_INFO_MMAP_VALID), + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE), .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_8000_48000, .rate_min = 8000, @@ -346,6 +348,9 @@ static void timer_timeout(struct timer_list *data) v_iter = from_timer(v_iter, data, timer_instance); substream = v_iter->substream;

+ if (v_iter->suspend) + return; + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !v_iter->is_buf_corrupted) check_buf_block(v_iter, substream->runtime); else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) @@ -358,7 +363,9 @@ static void timer_timeout(struct timer_list *data) v_iter->period_pos %= v_iter->period_bytes; snd_pcm_period_elapsed(substream); } - mod_timer(&v_iter->timer_instance, jiffies + TIMER_INTERVAL + inject_delay); + + if (!v_iter->suspend) + mod_timer(&v_iter->timer_instance, jiffies + TIMER_INTERVAL + inject_delay); }

static int snd_pcmtst_pcm_open(struct snd_pcm_substream *substream) @@ -373,19 +380,15 @@ static int snd_pcmtst_pcm_open(struct snd_pcm_substream *substream) if (!v_iter) return -ENOMEM;

+ v_iter->substream = substream; runtime->hw = snd_pcmtst_hw; runtime->private_data = v_iter; - v_iter->substream = substream; - v_iter->buf_pos = 0; - v_iter->is_buf_corrupted = false; - v_iter->period_pos = 0; - v_iter->total_bytes = 0;

playback_capture_test = 0; ioctl_reset_test = 0;

timer_setup(&v_iter->timer_instance, timer_timeout, 0); - mod_timer(&v_iter->timer_instance, jiffies + TIMER_INTERVAL); + return 0; }

@@ -400,10 +403,40 @@ static int snd_pcmtst_pcm_close(struct snd_pcm_substream *substream) return 0; }

+static inline void reset_buf_iterator(struct pcmtst_buf_iter *v_iter) +{ + v_iter->buf_pos = 0; + v_iter->is_buf_corrupted = false; + v_iter->period_pos = 0; + v_iter->total_bytes = 0; +} + +static inline void start_pcmtest_timer(struct pcmtst_buf_iter *v_iter) +{ + v_iter->suspend = false; + mod_timer(&v_iter->timer_instance, jiffies + TIMER_INTERVAL); +} + static int snd_pcmtst_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { + struct pcmtst_buf_iter *v_iter = substream->runtime->private_data; + if (inject_trigger_err) return -EINVAL; + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + reset_buf_iterator(v_iter); + start_pcmtest_timer(v_iter); + break; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + start_pcmtest_timer(v_iter); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + // We can't call timer_shutdown_sync here, as it is forbidden to sleep here + v_iter->suspend = true; + break; + }

return 0; }