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libcamera: software_isp: Emit ispStatsReady only if IPA is running

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Software ISP runs debayering in a separate thread and debayering may
emit statsReady when software ISP (including the IPA) is being stopped.
The signal waits in a queue and gets invoked later, resulting in an
assertion error when attempting to invoke a method on the stopped IPA:

  FATAL default soft_ipa_proxy.cpp:456 assertion
  "state_ == ProxyRunning" failed in processStatsThread()

Let's prevent this problem by forwarding the ISP stats signal from
software ISP only when the IPA is running.  To track this,
SoftwareISP::running_ variable is introduced.

Making processing of the other signals in SoftwareISP more robust is
addressed in the followup patches.

Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reported-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Milan Zamazal 2025-02-25 16:06:07 +01:00 • committed by Kieran Bingham
parent 1ea124c7a3
commit b72d789475
2 changed files with 5 additions and 1 deletions
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include/libcamera/internal/software_isp/software_isp.h
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@ -100,6 +100,7 @@ private:
DmaBufAllocator dmaHeap_;
std::unique_ptr<ipa::soft::IPAProxySoft> ipa_;
bool running_;
};
} /* namespace libcamera */