[alsa-devel] [PATCH 2/2] ASoC: wm_adsp: Update cached error state on trigger

[Charles Keepax]

From: Stuart Henderson <stuarth at opensource.cirrus.com>

If a compressed stream is restarted after getting an error, the cached
error value will still be used on the next pointer request, preventing
the stream from starting.  Resolve this by ensuring the error status is
updated on trigger start.

Signed-off-by: Stuart Henderson <stuarth at opensource.cirrus.com>
Signed-off-by: Charles Keepax <ckeepax at opensource.cirrus.com>
---
 sound/soc/codecs/wm_adsp.c | 38 +++++++++++++++++++++-----------------
 1 file changed, 21 insertions(+), 17 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 12ef85e85c29..8d16a14cd226 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -3426,6 +3426,23 @@ static int wm_adsp_buffer_free(struct wm_adsp *dsp)
 	return 0;
 }
 
+static int wm_adsp_buffer_get_error(struct wm_adsp_compr_buf *buf)
+{
+	int ret;
+
+	ret = wm_adsp_buffer_read(buf, HOST_BUFFER_FIELD(error), &buf->error);
+	if (ret < 0) {
+		adsp_err(buf->dsp, "Failed to check buffer error: %d\n", ret);
+		return ret;
+	}
+	if (buf->error != 0) {
+		adsp_err(buf->dsp, "Buffer error occurred: %d\n", buf->error);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 int wm_adsp_compr_trigger(struct snd_compr_stream *stream, int cmd)
 {
 	struct wm_adsp_compr *compr = stream->runtime->private_data;
@@ -3447,6 +3464,10 @@ int wm_adsp_compr_trigger(struct snd_compr_stream *stream, int cmd)
 			}
 		}
 
+		ret = wm_adsp_buffer_get_error(compr->buf);
+		if (ret < 0)
+			break;
+
 		wm_adsp_buffer_clear(compr->buf);
 
 		/* Trigger the IRQ at one fragment of data */
@@ -3522,23 +3543,6 @@ static int wm_adsp_buffer_update_avail(struct wm_adsp_compr_buf *buf)
 	return 0;
 }
 
-static int wm_adsp_buffer_get_error(struct wm_adsp_compr_buf *buf)
-{
-	int ret;
-
-	ret = wm_adsp_buffer_read(buf, HOST_BUFFER_FIELD(error), &buf->error);
-	if (ret < 0) {
-		adsp_err(buf->dsp, "Failed to check buffer error: %d\n", ret);
-		return ret;
-	}
-	if (buf->error != 0) {
-		adsp_err(buf->dsp, "Buffer error occurred: %d\n", buf->error);
-		return -EIO;
-	}
-
-	return 0;
-}
-
 int wm_adsp_compr_handle_irq(struct wm_adsp *dsp)
 {
 	struct wm_adsp_compr_buf *buf;
-- 
2.11.0