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-rw-r--r--src/ipa/ipu3/ipu3.cpp11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp
index c925cf64..30d2a539 100644
--- a/src/ipa/ipu3/ipu3.cpp
+++ b/src/ipa/ipu3/ipu3.cpp
@@ -457,6 +457,17 @@ void IPAIPU3::processControls([[maybe_unused]] unsigned int frame,
void IPAIPU3::fillParams(unsigned int frame, ipu3_uapi_params *params)
{
+ /*
+ * The incoming params buffer may contain uninitialised data, or the
+ * parameters of previously queued frames. Clearing the entire buffer
+ * may be an expensive operation, and the kernel will only read from
+ * structures which have their associated use-flag set.
+ *
+ * It is the responsibility of the algorithms to set the use flags
+ * accordingly for any data structure they update during prepare().
+ */
+ params->use = {};
+
for (auto const &algo : algorithms_)
algo->prepare(context_, params);