If we do not shutdown the peripheral properly at shutdown, the whole system
crashes after kexec() on the first io access.

Let's implement the appropriate callback.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: Liam Girdwood <lgirdwood@gmail.com>
To: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
To: Bard Liao <yung-chuan.liao@linux.intel.com>
To: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
To: Kai Vehmanen <kai.vehmanen@linux.intel.com>
To: Daniel Baluta <daniel.baluta@nxp.com>
To: Mark Brown <broonie@kernel.org>
To: Jaroslav Kysela <perex@perex.cz>
To: Takashi Iwai <tiwai@suse.com>
To: Matthias Brugger <matthias.bgg@gmail.com>
Cc: sound-open-firmware@alsa-project.org
Cc: alsa-devel@alsa-project.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 sound/soc/sof/mediatek/mt8186/mt8186.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c
index 181189e00e02..79da25725987 100644
--- a/sound/soc/sof/mediatek/mt8186/mt8186.c
+++ b/sound/soc/sof/mediatek/mt8186/mt8186.c
@@ -430,6 +430,11 @@ static int mt8186_dsp_remove(struct snd_sof_dev *sdev)
 	return 0;
 }
 
+static int mt8186_dsp_shutdown(struct snd_sof_dev *sdev)
+{
+	return snd_sof_suspend(sdev->dev);
+}
+
 static int mt8186_dsp_suspend(struct snd_sof_dev *sdev, u32 target_state)
 {
 	mt8186_sof_hifixdsp_shutdown(sdev);
@@ -538,6 +543,7 @@ static struct snd_sof_dsp_ops sof_mt8186_ops = {
 	/* probe and remove */
 	.probe		= mt8186_dsp_probe,
 	.remove		= mt8186_dsp_remove,
+	.shutdown	= mt8186_dsp_shutdown,
 
 	/* DSP core boot */
 	.run		= mt8186_run,
@@ -629,6 +635,7 @@ MODULE_DEVICE_TABLE(of, sof_of_mt8186_ids);
 static struct platform_driver snd_sof_of_mt8186_driver = {
 	.probe = sof_of_probe,
 	.remove = sof_of_remove,
+	.shutdown = sof_of_shutdown,
 	.driver = {
 	.name = "sof-audio-of-mt8186",
 		.pm = &sof_of_pm,

---
base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4
change-id: 20221127-mtk-snd-e0abf36be4c0

Best regards,
-- 
Ricardo Ribalda <ribalda@chromium.org>

On Sun, 27 Nov 2022 21:04:15 +0100, Ricardo Ribalda wrote:
> If we do not shutdown the peripheral properly at shutdown, the whole system
> crashes after kexec() on the first io access.
> 
> Let's implement the appropriate callback.
> 
> 

Applied to

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

Thanks!

[1/1] ASoC: SOF: mediatek: add shutdown callback
      commit: e063330a77edbdc57a142a27a82e51dc1361ab9d

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

Il 27/11/22 21:04, Ricardo Ribalda ha scritto:
> If we do not shutdown the peripheral properly at shutdown, the whole system
> crashes after kexec() on the first io access.
> 
> Let's implement the appropriate callback.
> 
> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>