Unverified Commit 74b4dd04 authored by Keyon Jie's avatar Keyon Jie Committed by Mark Brown
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ASoC: SOF: PM: add state machine to comments 



Add Audio DSP state machine with comments. Note that the
'D0<-->runtime D0I3' part is not implemented yet.

Signed-off-by: default avatarKeyon Jie <yang.jie@linux.intel.com>
Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191111223343.19986-2-pierre-louis.bossart@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 0af237d5

sound/soc/sof/pm.c

+32 −0
Original line number Diff line number Diff line
@@ -428,6 +428,38 @@ int snd_sof_set_d0_substate(struct snd_sof_dev *sdev, 
}

EXPORT_SYMBOL(snd_sof_set_d0_substate);



/*

 * Audio DSP states may transform as below:-

 *

 *                                         D0I3 compatible stream

 *     Runtime    +---------------------+   opened only, timeout

 *     suspend    |                     +--------------------+

 *   +------------+       D0(active)    |                    |

 *   |            |                     <---------------+    |

 *   |   +-------->                     |               |    |

 *   |   |Runtime +--^--+---------^--+--+ The last      |    |

 *   |   |resume     |  |         |  |    opened D0I3   |    |

 *   |   |           |  |         |  |    compatible    |    |

 *   |   |     resume|  |         |  |    stream closed |    |

 *   |   |      from |  | D3      |  |                  |    |

 *   |   |       D3  |  |suspend  |  | d0i3             |    |

 *   |   |           |  |         |  |suspend           |    |

 *   |   |           |  |         |  |                  |    |

 *   |   |           |  |         |  |                  |    |

 * +-v---+-----------+--v-------+ |  |           +------+----v----+

 * |                            | |  +----------->                |

 * |       D3 (suspended)       | |              |      D0I3      +-----+

 * |                            | +--------------+                |     |

 * |                            |  resume from   |                |     |

 * +-------------------^--------+  d0i3 suspend  +----------------+     |

 *                     |                                                |

 *                     |                       D3 suspend               |

 *                     +------------------------------------------------+

 *

 * d0i3_suspend = s0_suspend && D0I3 stream opened,

 * D3 suspend = !d0i3_suspend,

 */



int snd_sof_resume(struct device *dev)

{

	struct snd_sof_dev *sdev = dev_get_drvdata(dev);

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