dspbridge_init: 600000 bytes is phys_mempool_size, and the value is correct
the value in '/etc/modprobe.d/bridgedriver' for phys_mempool_base should be 0 (use default value) and for shm_size should be 0x500000 if set up at all.
Anyway, what is your problem? You cannot play videos or what? What error message / dmesg log do you have.