tools: plugin: README: Add instructions for testing noise suppression

Fix the stale instruction for install and add the steps for setting up
OpenVino/OpenCV to test the noise suppression model from the open model
zoo repository.

Signed-off-by: Ranjani Sridharan <[email protected]>

tools/plugin/README.md

@@ -34,7 +34,7 @@ cmake --build    build-plugin/
 then (use default ALSA prefix atm)
 
 ```
-sudo make install <ALSA prefix>
+sudo cmake --install build-plugin/
 
 Make sure to set the LD_LIBRARY_PATH to include directory where the SOF modules are installed
 Ex: "~/work/sof/sof/build_plugin/sof_ep/install/lib:~/work/sof/sof/build_plugin/modules/"
@@ -76,6 +76,31 @@ Mixer settings can be adjusted for bdw-nocodec by (Not functional yet)
 alsamixer -Dsof:tgl-nocodec:1
 ```
 
+# Instructions for testing OpenVino noise suppression model with the SOF plugin:
+1. Fetch the model from the Open Model zoo repository ex: noise-suppression-poconetlike-0001.xml
+
+https://docs.openvino.ai/archive/2023.0/omz_demos.html#build-the-demo-applications-on-linux
+
+2. Source OpenVino environment and get OpenCV
+https://www.intel.com/content/www/us/en/developer/tools/openvino-toolkit-download.html
+
+3. Worth building and running the demo noise suppression application in the open model zoo
+repository to make sure OpenVino and OpenCV are configured properly.
+
+4. Set environment variable NOISE_SUPPRESSION_MODEL_NAME to point to the model file
+```
+export NOISE_SUPPRESSION_MODEL_NAME="~/open_model_zoo/demos/noise_suppression_demo/cpp/intel/noise-suppression-poconetlike-0001/FP16/noise-suppression-poconetlike-0001.xml"
+
+```
+5. Enable noise suppression by setting NOISE_SUPPRESSION=true in the tplg-targets for the sof-plugin topology
+
+6. Start capture using the following command. This uses the 16K capture from the DMIC from
+PCM hw device 0,7. Currently, only 16K capture is supported but in the future this will be expanded
+to work with 48K capture.
+```
+arecord -Dsof:plugin:1:0:7:16k2c16b -f dat -r 16000 --period-size=2048 file_ns_16k.wa
+```
+
 #TODO Items (and T-shirt size) for single pipeline E2E audio
  * IPC4 support in tplg parser (M)
  * IPC4 support in plugin (pipe/ipc4.c) (M)