Linux Mainline

[maal]

I don't think it's a problem.

From datasheet (http://opensource.rock-chips.com/images/...170309.pdf):

 GMAC 10/100/1000M Ethernet Controller
 Supports 10/100/1000-Mbps data transfer rates with the RGMII interfaces 
 Supports 10/100-Mbps data transfer rates with the RMII interfaces 
 There are 2 controllers, one is connected to internal FE PHY, the other is for external PHY device 
 Supports both full-duplex and half-duplex operation 
 Supports IEEE 802.1Q VLAN tag detection for reception frames 
 Support detection of LAN wake-up frames and AMD Magic Packet frames 
 Handles automatic retransmission of Collision frames for transmission 

 Ethernet PHY 
 Integrated IEEE 802.3/802.3u compliant 10/100Mbps Ethernet PHY 
 Supporting both full and half duplex for either 10 or 100 Mb/s data rate 
 Auto MDIX capable 
 Supports wake-on-LAN, EEE 
 100Base-FX support 
 Supports auto-negotiation


According to dmesg messages both Ethernet controllers are connected: first at 1 Gbit/s, second at 100 Mbit/s (max supported by internal PHY).