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0e1f616
(Get the code!)
vMeta, the HW video accelerator, has to use physical continuous memory. This "VMETA memory size" will have kernel reserve a block of DDR memory for video playback. The typical H.264 streams would cost <= 64MB DDR to decode while the most complex 1080p H.264 streams with 16 reference frames would cost up to 96MB DDR.
The negative impact is to have less free memory because the reserved memory is not controlled by kernel any longer.
The size of reserved memory could be changed by adding boot parameter "vmeta_size=n" (e.g. vmeta_size=96 ) when booting kernel from uboot.