I have a question about i.MX6DQ VPU.
Please see Table 69-1 in IMX6DQRM Rev.3.
It says h.264 decoder supports HP (High Profile).
According to "Feature support in particular profiles" table in the following site, high profile supports "4:0:0 (Monochrome)".
Then, do i.MX6DQ VPU and Linux BSP (L3.14.xxx) support "4:0:0 (Monochrome)"?