libcamera: pipeline: ipu3: Try queuing pending requests if a buffer is available

IPU3CameraData stores requests that have been failed due to a
buffer shortage. The requests should be retried once enough
buffers are available. This sets the retry function as signal to
CIO2Device and IPU3Frame, and invokes it from
CIO2Device::tryReturnBuffer() and IPU3Frame::remove().

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libcamera/pipeline/ipu3/frames.cpp b/src/libcamera/pipeline/ipu3/frames.cpp
index 29d9aafc..d9a2249b 100644
--- a/src/libcamera/pipeline/ipu3/frames.cpp
+++ b/src/libcamera/pipeline/ipu3/frames.cpp
@@ -103,6 +103,8 @@ bool IPU3Frames::tryComplete(IPU3Frames::Info *info)
 
 	remove(info);
 
+	bufferAvailable.emit();
+
 	return true;
 }