The DSP uses an IRQ to indicate data is available on the compressed
stream. For voice trigger use-cases the first such IRQ can be considered
an indication that the user has spoken the key phrase triggering the
firmware. Provide a means for the ADSP code to communicate back to the
calling driver whether an IRQ should be considered as trigger event or
not.
Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/wm_adsp.c | 5 +++++
sound/soc/codecs/wm_adsp.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index a07bd7c..378ec30 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -394,6 +394,7 @@ static const struct {
int compr_direction;
int num_caps;
const struct wm_adsp_fw_caps *caps;
+ bool voice_trigger;
} wm_adsp_fw[WM_ADSP_NUM_FW] = {
[WM_ADSP_FW_MBC_VSS] = { .file = "mbc-vss" },
[WM_ADSP_FW_HIFI] = { .file = "hifi" },
@@ -406,6 +407,7 @@ static const struct {
.compr_direction = SND_COMPRESS_CAPTURE,
.num_caps = ARRAY_SIZE(ctrl_caps),
.caps = ctrl_caps,
+ .voice_trigger = true,
},
[WM_ADSP_FW_ASR] = { .file = "asr" },
[WM_ADSP_FW_TRACE] = {
@@ -2998,6 +3000,9 @@ int wm_adsp_compr_handle_irq(struct wm_adsp *dsp)
goto out;
}
+ if (wm_adsp_fw[dsp->fw].voice_trigger && buf->irq_count == 2)
+ ret = WM_ADSP_COMPR_VOICE_TRIGGER;
+
out_notify:
if (compr && compr->stream)
snd_compr_fragment_elapsed(compr->stream);
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index feb61e2..be3b5bc 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -19,6 +19,10 @@
#include "wmfw.h"
+/* Return values for wm_adsp_compr_handle_irq */
+#define WM_ADSP_COMPR_OK 0
+#define WM_ADSP_COMPR_VOICE_TRIGGER 1
+
struct wm_adsp_region {
int type;
unsigned int base;
--
2.1.4
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
