@neeraj See this thread:
It looks like he’s suggesting that it should work on _r7, but I’m not sure how to enable it. It doesn’t appear to work out of the box. Hopefully @tenk.wang will Chime in with what we need to modify to get it to work. 
I applied the patches from this link: yukawa: Add v4l2_codec2 support (42133351) · Commits · BayLibre / amlogic / Android TV / aosp / device / amlogic / yukawa · GitLab but its not working for me.
Even the service is not running.
Here are some logs:
DM,FC Y android.hardware.keymaster@3.0::IKeymasterDevice/default 0/1 281 280 251
FM Y android.hardware.media.c2@1.0::IComponentStore/software 0/2 507 495 251
FM Y android.hardware.media.c2@1.1::IComponentStore/software 0/2 507 495 251
FM Y android.hardware.media.c2@1.2::IComponentStore/software 0/2 507 495 251
DM,FC Y android.hardware.media.omx@1.0::IOmx/default 0/3 506 495 251
DM,FC Y android.hardware.media.omx@1.0::IOmxStore/default 0/3 506 251
DM,FC Y android.hardware.memtrack@1.0::IMemtrack/default 0/1 411 596 251
adb logcat:
01-01 00:14:56.253 0 0 E init : Control message: Could not find ‘android.hardware.media.c2@1.0::IComponentStore/default’ for ctl.interface_start from pid: 251 (/system/bin/hwservicemanager)
11-20 16:35:03.170 495 1849 W HidlServiceManagement: Waited one second for android.hardware.media.c2@1.0::IComponentStore/default
11-20 16:35:03.172 251 251 I hwservicemanager: Since android.hardware.media.c2@1.0::IComponentStore/default is not registered, trying to start it as a lazy HAL.
11-20 16:35:03.174 495 1849 I HidlServiceManagement: getService: Trying again for android.hardware.media.c2@1.0::IComponentStore/default…
01-01 00:14:56.409 0 0 E init : Control message: Could not find ‘android.hardware.media.c2@1.0::IComponentStore/default’ for ctl.interface_start from pid: 251 (/system/bin/hwservicemanager)
11-20 16:35:03.188 251 4324 W libc : Unable to set property “ctl.interface_start” to “android.hardware.media.c2@1.0::IComponentStore/default”: error code: 0x20
11-20 16:35:03.189 251 4324 I hwservicemanager: Tried to start android.hardware.media.c2@1.0::IComponentStore/default as a lazy service, but was unable to. Usually this happens when a service is not installed, but if the service is intended to be used as a lazy service, then it may be configured incorrectly.