[15/22] libcamera: software_isp: Start the ISP thread in configure
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Message ID 20251120232019.3590-16-bryan.odonoghue@linaro.org
State New
Headers show
Series
  • GPUISP precursor series
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Commit Message

Bryan O'Donoghue Nov. 20, 2025, 11:20 p.m. UTC 
EGL is not thread-safe and in fact associates invisible handles with the
threadid of the calling context.

As a result we need to make Deabyer::configure() and Debayer::process() in SoftISP execute on
the same thread.

When we call Debayer::configure() in the egl class this will setup and egl context
for us which is associated with the calling thread context. Hence when
Debayer::process(); runs it must run in the same thread as
Debayer::configure() or the hidden Gegl context handles will not point
to the same place.

Move start thread into configure() as a first step towards this.

Co-developed-by: Robert Mader <robert.mader@collabora.com>
Signed-off-by: Robert Mader <robert.mader@collabora.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 src/libcamera/software_isp/software_isp.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch
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diff --git a/src/libcamera/software_isp/software_isp.cpp b/src/libcamera/software_isp/software_isp.cpp
index 928a2520c..afa4eb7a8 100644
--- a/src/libcamera/software_isp/software_isp.cpp
+++ b/src/libcamera/software_isp/software_isp.cpp
@@ -265,6 +265,8 @@  int SoftwareIsp::configure(const StreamConfiguration &inputCfg,
 	if (ret < 0)
 		return ret;
 
+	ispWorkerThread_.start();
+
 	return debayer_->configure(inputCfg, outputCfgs, ccmEnabled_);
 }
 
@@ -346,7 +348,6 @@  int SoftwareIsp::start()
 	if (ret)
 		return ret;
 
-	ispWorkerThread_.start();
 	return 0;
 }