Despite Amlogic roadmap claiming none of the upcoming Amlogic TV box SoCs will support USB 3.0, I’ve been informed that Amlogic S905X might already support USB 3.0. So I had a check with NEXBOX A5 TV box. First we can see dwc3 (DesignWare USB3) module is loaded:
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lsmod Module Size Used by dwc3 17981 0 mali 233433 36 |
then this happens when I connect a USB 3.0 hard drive or flash drive:
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[ 4812.378262@0] usb 1-2: new high-speed USB device number 7 using xhci-hcd [ 4812.798557@0] usb-storage 1-2:1.0: USB Mass Storage device detected [ 4812.801416@0] scsi1 : usb-storage 1-2:1.0 |
The important point here is xhci, which stands for “eXtensible Host Controller Interface” and supports USB 1.x to USB 3.x devices. The next step is to check performance, but since S905X is running Android 6.0, I went through permission issues with both A1SD bench and Disk Speed apps, so I reverted to using dd to read a large file to /dev/null. Result with USB 3.0 hard drive:
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dd if=Sintel-Bluray.iso of=/dev/null bs=1024*1024*32 47+1 records in 47+1 records out 1593180160 bytes transferred in 42.681 secs (37327620 bytes/sec) |
That’s about 35.6 MB/s, which would be an excellent USB 2.0 transfer rate, but not quite USB 3.0 material, […]
