[RFC,3/4] pipeline: rkisp1: Limit the maximum number of buffers queued in
diff mbox series

Message ID 20250526214224.13631-4-stefan.klug@ideasonboard.com
State New
Headers show
Series
  • rkisp1: Allow usage of more than 4 buffers
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Commit Message

Stefan Klug May 26, 2025, 9:42 p.m. UTC 
To keep the regulation of the algorithms as short as possible and to
allow more buffers to be created than the v4l2 device allows to be queued,
limit the amount of buffers that get queued into the device to the pipeline depth.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
---
 src/libcamera/pipeline/rkisp1/rkisp1.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

Patch
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diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 675f0a7490a6..af9117c83630 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -155,6 +155,12 @@  private:
 	Transform combinedTransform_;
 };
 
+namespace {
+
+const unsigned int kPipelineDepth = 4;
+
+};
+
 class PipelineHandlerRkISP1 : public PipelineHandler
 {
 public:
@@ -171,6 +177,7 @@  public:
 	void stopDevice(Camera *camera) override;
 
 	int queueRequestDevice(Camera *camera, Request *request) override;
+	unsigned int maxQueuedRequestsDevice() const override { return kPipelineDepth; }
 
 	bool match(DeviceEnumerator *enumerator) override;