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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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1
include/libcamera/internal/software_isp/software_isp.h
View file

@ -100,6 +100,7 @@ private:
DmaBufAllocator dmaHeap_;
std::unique_ptr<ipa::soft::IPAProxySoft> ipa_;
bool running_;
};
} /* namespace libcamera */

5
src/libcamera/software_isp/software_isp.cpp
View file

@ -315,6 +315,7 @@ int SoftwareIsp::start()
int ret = ipa_->start();
if (ret)
return ret;
running_ = true;
ispWorkerThread_.start();
return 0;
@ -328,6 +329,7 @@ void SoftwareIsp::stop()
ispWorkerThread_.exit();
ispWorkerThread_.wait();
running_ = false;
ipa_->stop();
}
@ -356,7 +358,8 @@ void SoftwareIsp::setSensorCtrls(const ControlList &sensorControls)
void SoftwareIsp::statsReady(uint32_t frame, uint32_t bufferId)
{
ispStatsReady.emit(frame, bufferId);
if (running_)
ispStatsReady.emit(frame, bufferId);
}
void SoftwareIsp::inputReady(FrameBuffer *input)