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[RFC] Initial FW watchdog implementation #841

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[RFC] Initial FW watchdog implementation #841

wants to merge 2 commits into from

Commits on Apr 17, 2019

  1. ASoC: SOF: force suspend upon IPC error 

    Implement a basic recovery flow for the case when hardware
hits a fatal error and stops responding to IPC messages.
The SOF core is left in an unrecoverable state in this case, as power
down sequence is blocked by inability to send state save IPC to
the firmware.

To force recovery, detect when IPC fails to a timeout on the
suspend call path, and force device to suspend despite of the error.

This patch only helps on devices with runtime PM enabled.

Signed-off-by: Kai Vehmanen <[email protected]>
    @kv2019i
    kv2019i committed Apr 17, 2019
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  2. ASoC: SOF: power cycle upon errors at hw_free 

    To ensure fatal FW errors are detected even if runtime PM is not
in use, add an additional check to 'hw_free' method. By forcing
a suspend-resume cycle on IPC timeout errors, we ensure FW is
not left in error state at stream close.

Signed-off-by: Kai Vehmanen <[email protected]>
    @kv2019i
    kv2019i committed Apr 17, 2019
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    7cd1569 View commit details
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