[alsa-devel] Applied "ASoC: wm_adsp: Shutdown any compressed streams on DSP watchdog timeout" to the asoc tree

[Mark Brown]

The patch

   ASoC: wm_adsp: Shutdown any compressed streams on DSP watchdog timeout

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a2bcbc1b9ac2f982a438081a9f1b5d823332d514 Mon Sep 17 00:00:00 2001
From: Charles Keepax <ckeepax at opensource.cirrus.com>
Date: Tue, 19 Mar 2019 11:52:07 +0000
Subject: [PATCH] ASoC: wm_adsp: Shutdown any compressed streams on DSP
 watchdog timeout

If a watchdog timeout is received from the DSP it is safe to assume the
DSP is not functioning anymore and as such any active compressed streams
should be put into an error state.

Signed-off-by: Charles Keepax <ckeepax at opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/wm_adsp.c | 21 +++++++++++++++++++++
 sound/soc/codecs/wm_adsp.h |  1 +
 2 files changed, 22 insertions(+)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index c19a8a041d4d..5608ed5decca 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -2905,6 +2905,8 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w,
 		if (wm_adsp_fw[dsp->fw].num_caps != 0)
 			wm_adsp_buffer_free(dsp);
 
+		dsp->fatal_error = false;
+
 		mutex_unlock(&dsp->pwr_lock);
 
 		adsp_dbg(dsp, "Execution stopped\n");
@@ -3000,6 +3002,9 @@ static int wm_adsp_compr_attach(struct wm_adsp_compr *compr)
 {
 	struct wm_adsp_compr_buf *buf = NULL, *tmp;
 
+	if (compr->dsp->fatal_error)
+		return -EINVAL;
+
 	list_for_each_entry(tmp, &compr->dsp->buffer_list, list) {
 		if (!tmp->name || !strcmp(compr->name, tmp->name)) {
 			buf = tmp;
@@ -3916,6 +3921,21 @@ int wm_adsp2_lock(struct wm_adsp *dsp, unsigned int lock_regions)
 }
 EXPORT_SYMBOL_GPL(wm_adsp2_lock);
 
+static void wm_adsp_fatal_error(struct wm_adsp *dsp)
+{
+	struct wm_adsp_compr *compr;
+
+	dsp->fatal_error = true;
+
+	list_for_each_entry(compr, &dsp->compr_list, list) {
+		if (compr->stream) {
+			snd_compr_stop_error(compr->stream,
+					     SNDRV_PCM_STATE_XRUN);
+			snd_compr_fragment_elapsed(compr->stream);
+		}
+	}
+}
+
 irqreturn_t wm_adsp2_bus_error(struct wm_adsp *dsp)
 {
 	unsigned int val;
@@ -3934,6 +3954,7 @@ irqreturn_t wm_adsp2_bus_error(struct wm_adsp *dsp)
 	if (val & ADSP2_WDT_TIMEOUT_STS_MASK) {
 		adsp_err(dsp, "watchdog timeout error\n");
 		wm_adsp_stop_watchdog(dsp);
+		wm_adsp_fatal_error(dsp);
 	}
 
 	if (val & (ADSP2_SLAVE_ERR_MASK | ADSP2_REGION_LOCK_ERR_MASK)) {
diff --git a/sound/soc/codecs/wm_adsp.h b/sound/soc/codecs/wm_adsp.h
index 59e07ad16329..8f09b4419a91 100644
--- a/sound/soc/codecs/wm_adsp.h
+++ b/sound/soc/codecs/wm_adsp.h
@@ -85,6 +85,7 @@ struct wm_adsp {
 	bool preloaded;
 	bool booted;
 	bool running;
+	bool fatal_error;
 
 	struct list_head ctl_list;
 
-- 
2.20.1