On Thu, 21 Mar 2019 17:10:13 +0100, Pierre-Louis Bossart wrote:
From: Liam Girdwood liam.r.girdwood@linux.intel.com
Add support for saving and restoring DSP context in D3 to host DDR.
The suspend callback includes: suspend all pcm's stream that are running, send CTX_SAVE ipc, drop all ipc's, release trace dma and then power off the DSP.
And the resume callback performs the following steps: load FW, run FW, re-initialize trace, restore pipeline, restore the kcontrol values and finally send the ctx restore ipc to the dsp.
The streams that are suspended are resumed by the ALSA resume trigger. If the streams are paused during system suspend, they are marked explicitly so they can be restored during PAUSE_RELEASE.
Signed-off-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
sound/soc/sof/pm.c | 373 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 373 insertions(+) create mode 100644 sound/soc/sof/pm.c
diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c new file mode 100644 index 000000000000..fd0cf10bf742 --- /dev/null +++ b/sound/soc/sof/pm.c @@ -0,0 +1,373 @@ +// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) +// +// This file is provided under a dual BSD/GPLv2 license. When using or +// redistributing this file, you may do so under either license. +// +// Copyright(c) 2018 Intel Corporation. All rights reserved. +// +// Author: Liam Girdwood liam.r.girdwood@linux.intel.com +//
+#include "ops.h" +#include "sof-priv.h"
+static int sof_restore_kcontrols(struct snd_sof_dev *sdev) +{
- struct snd_sof_control *scontrol = NULL;
- int ipc_cmd, ctrl_type;
- int ret = 0;
- /* restore kcontrol values */
- list_for_each_entry(scontrol, &sdev->kcontrol_list, list) {
/* reset readback offset for scontrol after resuming */scontrol->readback_offset = 0;/* notify DSP of kcontrol values */switch (scontrol->cmd) {case SOF_CTRL_CMD_VOLUME:/* fallthrough */case SOF_CTRL_CMD_ENUM:/* fallthrough */case SOF_CTRL_CMD_SWITCH:
In such an expression, fallthrough marker is superfluous.
switch (foo) { case A: case B: case C: ....
thanks,
Takashi