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ASoC: SOF: Intel: hda: Amend the DSP state transition diagram

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Amend the DSP state transition diagram in preparation
for introducing the feature to support opportunistic
DSP D0I3 state when the system is in S0.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200129220726.31792-8-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ranjani Sridharan 2020-01-29 16:07:24 -06:00 committed by Mark Brown
parent de23a838d8
commit 207bf12f64
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GPG Key ID: 24D68B725D5487D0
1 changed files with 17 additions and 19 deletions
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36
sound/soc/sof/intel/hda-dsp.c
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@ -488,33 +488,31 @@ int hda_dsp_set_power_state(struct snd_sof_dev *sdev,
/*
* Audio DSP states may transform as below:-
*
* D0I3 compatible stream
* Runtime +---------------------+ opened only, timeout
* Opportunistic D0I3 in S0
* Runtime +---------------------+ Delayed D0i3 work timeout
* suspend | +--------------------+
* +------------+ D0(active) | |
* +------------+ D0I0(active) | |
* | | <---------------+ |
* | +--------> | | |
* | |Runtime +--^--+---------^--+--+ The last | |
* | |resume | | | | opened D0I3 | |
* | | | | | | compatible | |
* | | resume| | | | stream closed | |
* | | from | | D3 | | | |
* | | D3 | |suspend | | d0i3 | |
* | +--------> | New IPC | |
* | |Runtime +--^--+---------^--+--+ (via mailbox) | |
* | |resume | | | | | |
* | | | | | | | |
* | | System| | | | | |
* | | resume| | S3/S0IX | | | |
* | | | | suspend | | S0IX | |
* | | | | | |suspend | |
* | | | | | | | |
* | | | | | | | |
* +-v---+-----------+--v-------+ | | +------+----v----+
* | | | +-----------> |
* | D3 (suspended) | | | D0I3 +-----+
* | | +--------------+ | |
* | | resume from | | |
* +-------------------^--------+ d0i3 suspend +----------------+ |
* | |
* | D3 suspend |
* +------------------------------------------------+
* | D3 (suspended) | | | D0I3 |
* | | +--------------+ |
* | | System resume | |
* +----------------------------+ +----------------+
*
* d0i3_suspend = s0_suspend && D0I3 stream opened,
* D3 suspend = !d0i3_suspend,
* S0IX suspend: The DSP is in D0I3 if any D0I3-compatible streams
* ignored the suspend trigger. Otherwise the DSP
* is in D3.
*/
static int hda_suspend(struct snd_sof_dev *sdev, bool runtime_suspend)