imx-machine-learning: tensorflow-lite-ethosu-delegate: remove backported patch

The patch is now included in the latest available version, 2.15.

https://onedigi.atlassian.net/browse/DEL-9011
https://onedigi.atlassian.net/browse/DEL-9081

Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>

meta-digi-dey/dynamic-layers/imx-machine-learning/recipes-libraries/tensorflow-lite/tensorflow-lite-ethosu-delegate/0001-Fix-hang-issue-with-multiple-tflite-context.patch

@@ -1,102 +0,0 @@
-From: nxf77310 <rhody.ma@nxp.com>
-Date: Tue, 26 Mar 2024 12:38:26 +0530
-Subject: [PATCH] Fix hang issue with multiple tflite context
-
----
- ethosu_delegate.cc | 34 ++++++++++++++++++++++------------
- simple_delegate.cc |  2 +-
- simple_delegate.h  |  2 +-
- 3 files changed, 24 insertions(+), 14 deletions(-)
-
-diff --git a/ethosu_delegate.cc b/ethosu_delegate.cc
-index b45ba26..b975b31 100644
---- a/ethosu_delegate.cc
-+++ b/ethosu_delegate.cc
-@@ -456,19 +456,21 @@ class EthosuDelegate : public SimpleDelegateInterface {
- 
-   TfLiteStatus Initialize(TfLiteContext* context) override {
-     try {
--        ethosu_context.device =
--		EthosU::Device::GetSingleton(options_.device_name.c_str());
-+	TfLiteEthosuContext *ethosu_context = new TfLiteEthosuContext;
-+        ethosu_context->device =
-+	EthosU::Device::GetSingleton(options_.device_name.c_str());
- 
-         if (options_.enable_profiling && options_.profiling_buffer_size != 0){
-             size_t size = sizeof(EthosuQreadEvent) * options_.profiling_buffer_size;
--            ethosu_context.qread_buffer =
--		    make_shared<EthosU::Buffer>(*ethosu_context.device, size);
--            ethosu_context.qread_buffer->resize(0);
--        } else {
--            ethosu_context.qread_buffer = nullptr;
-+            ethosu_context->qread_buffer =
-+	    make_shared<EthosU::Buffer>(*ethosu_context->device, size);
-+            ethosu_context->qread_buffer->resize(0);
-+	} else {
-+            ethosu_context->qread_buffer = nullptr;
-         }
--	ethosu_context.arena_buffer = nullptr;
--	ethosu_context.flash_buffer = nullptr;
-+	ethosu_context->arena_buffer = nullptr;
-+	ethosu_context->flash_buffer = nullptr;
-+	context_map_[context] = ethosu_context;
-     } catch (exception &e) {
-         TF_LITE_KERNEL_LOG(context, "Failed to create ethos_u driver.\n");
-         return kTfLiteDelegateError;
-@@ -477,8 +479,9 @@ class EthosuDelegate : public SimpleDelegateInterface {
-     return kTfLiteOk;
-   }
- 
--  void *GetDelegateContext() const{
--      return (void*) &ethosu_context;
-+  void *GetDelegateContext(TfLiteContext* context) const{
-+      return context_map_.at(context);
-+
-   }
- 
-   const char* Name() const override {
-@@ -496,9 +499,16 @@ class EthosuDelegate : public SimpleDelegateInterface {
-     return SimpleDelegateInterface::Options();
-   }
- 
-+  ~EthosuDelegate() {
-+    std::map<TfLiteContext*, void*>::iterator itr;
-+    for (itr = context_map_.begin(); itr != context_map_.end(); ++itr) {
-+       delete (TfLiteEthosuContext*)itr->second;
-+    }
-+  }
-+
-  private:
-   const EthosuDelegateOptions options_;
--  TfLiteEthosuContext ethosu_context;
-+  std::map<TfLiteContext*, void*> context_map_;
- };
- 
- }  // namespace ethosu
-diff --git a/simple_delegate.cc b/simple_delegate.cc
-index 51bd5b7..f65b475 100644
---- a/simple_delegate.cc
-+++ b/simple_delegate.cc
-@@ -48,7 +48,7 @@ TfLiteRegistration GetDelegateKernelRegistration(
-     }
-     auto* delegate =
-         reinterpret_cast<SimpleDelegateInterface*>(params->delegate->data_);
--    void* delegate_context = delegate->GetDelegateContext();
-+    void* delegate_context = delegate->GetDelegateContext(context);
-     std::unique_ptr<SimpleDelegateKernelInterface> delegate_kernel(
-         delegate->CreateDelegateKernelInterface());
-     if (delegate_kernel->Init(context, params, delegate_context) != kTfLiteOk) {
-diff --git a/simple_delegate.h b/simple_delegate.h
-index 9bd891d..6509374 100644
---- a/simple_delegate.h
-+++ b/simple_delegate.h
-@@ -115,7 +115,7 @@ class SimpleDelegateInterface {
-   virtual SimpleDelegateInterface::Options DelegateOptions() const = 0;
- 
-   // Get the SimpleDelegate global context data
--  virtual void *GetDelegateContext() const = 0;
-+  virtual void *GetDelegateContext(TfLiteContext* context) const = 0;
- };
- 
- // Factory class that provides static methods to deal with SimpleDelegate
-

meta-digi-dey/dynamic-layers/imx-machine-learning/recipes-libraries/tensorflow-lite/tensorflow-lite-ethosu-delegate_2.12.1.bbappend

@@ -1,3 +0,0 @@
-# Copyright (C) 2024 Digi International Inc.
-
-SRC_URI += "file://0001-Fix-hang-issue-with-multiple-tflite-context.patch"