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| author | Charles Keepax <ckeepax@opensource.cirrus.com> | 2018-02-26 10:49:47 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-02-26 10:53:41 +0000 |
| commit | 61fc060c40e6b92350c08a210619fc7d93c61e42 (patch) | |
| tree | e7b28daad22f1ce9298622c95f6325fa97e45a59 /sound | |
| parent | e21a5acfab2f13eeffe50d5d5f87c099540a3bf3 (diff) | |
| download | linux-61fc060c40e6b92350c08a210619fc7d93c61e42.tar.gz linux-61fc060c40e6b92350c08a210619fc7d93c61e42.tar.bz2 linux-61fc060c40e6b92350c08a210619fc7d93c61e42.zip | |
ASoC: wm_adsp: Support streams which can start/stop with DSP active
Clear the buffer data structure on each trigger start such that the
buffer is in a sensible state even if the DSP itself didn't restart.
This is necessary to support voice control streams which can trigger
multiple times without reloading the firmware.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/wm_adsp.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 0060aeb63a9f..ab91f1320ad5 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -3258,6 +3258,13 @@ static int wm_adsp_buffer_populate(struct wm_adsp_compr_buf *buf) return 0; } +static void wm_adsp_buffer_clear(struct wm_adsp_compr_buf *buf) +{ + buf->irq_count = 0xFFFFFFFF; + buf->read_index = -1; + buf->avail = 0; +} + static int wm_adsp_buffer_init(struct wm_adsp *dsp) { struct wm_adsp_compr_buf *buf; @@ -3268,8 +3275,8 @@ static int wm_adsp_buffer_init(struct wm_adsp *dsp) return -ENOMEM; buf->dsp = dsp; - buf->read_index = -1; - buf->irq_count = 0xFFFFFFFF; + + wm_adsp_buffer_clear(buf); ret = wm_adsp_buffer_locate(buf); if (ret < 0) { @@ -3327,16 +3334,17 @@ int wm_adsp_compr_trigger(struct snd_compr_stream *stream, int cmd) switch (cmd) { case SNDRV_PCM_TRIGGER_START: - if (wm_adsp_compr_attached(compr)) - break; - - ret = wm_adsp_compr_attach(compr); - if (ret < 0) { - adsp_err(dsp, "Failed to link buffer and stream: %d\n", - ret); - break; + if (!wm_adsp_compr_attached(compr)) { + ret = wm_adsp_compr_attach(compr); + if (ret < 0) { + adsp_err(dsp, "Failed to link buffer and stream: %d\n", + ret); + break; + } } + wm_adsp_buffer_clear(compr->buf); + /* Trigger the IRQ at one fragment of data */ ret = wm_adsp_buffer_write(compr->buf, HOST_BUFFER_FIELD(high_water_mark), |