1.修改设备树
在.dts下找到disp节点
disp: disp@01000000 {
			disp_init_enable         = <1>;
			disp_mode                = <5>;    //0-异显  5-同显

2.勾选内核
CONFIG_DISP2_SUNXI_MUTI_SCREEN = y

会出以下报错

[    5.707506] usbcore: registered new interface driver usbserial_generic
[    5.707559] usbserial: USB Serial support registered for generic
[    5.707639] usbcore: registered new interface driver ch341
[    5.707689] usbserial: USB Serial support registered for ch341-uart
[    5.707766] usbcore: registered new interface driver option
[    5.707817] usbserial: USB Serial support registered for GSM modem (1-port)
[    5.708217] usbcore: registered new interface driver pl2303
[    5.708270] usbserial: USB Serial support registered for pl2303
[    5.708366] usbcore: registered new interface driver quatech2
[    5.708412] usbserial: USB Serial support registered for Quatech 2nd gen USB to Serial Driver
[    5.711280] usb_serial_number:20080411
[    5.711960] dummy_hcd dummy_hcd.0: USB Host+Gadget Emulator, driver 02 May 2005
[    5.711969] dummy_hcd dummy_hcd.0: Dummy host controller
[    5.712227] dummy_hcd dummy_hcd.0: new USB bus registered, assigned bus number 7
[    5.712419] usb usb7: New USB device found, idVendor=1d6b, idProduct=0002
[    5.712425] usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    5.712431] usb usb7: Product: Dummy host controller
[    5.712436] usb usb7: Manufacturer: Linux 4.9.170 dummy_hcd
[    5.712441] usb usb7: SerialNumber: dummy_hcd.0
[    5.713125] hub 7-0:1.0: USB hub found
[    5.713157] hub 7-0:1.0: 1 port detected
[    5.715049] sunxikbd_key_init: key0 vol= 210 code= 115
[    5.715055] sunxikbd_key_init: key1 vol= 410 code= 114
[    5.715061] sunxikbd_key_init: key2 vol= 590 code= 139
[    5.715066] sunxikbd_key_init: key3 vol= 750 code= 28
[    5.715071] sunxikbd_key_init: key4 vol= 880 code= 172
[    5.715372] input: sunxi-keyboard as /devices/virtual/input/input0
[    5.715928] usbcore: registered new interface driver xpad
[    5.716010] usbcore: registered new interface driver usb_acecad
[    5.716089] usbcore: registered new interface driver aiptek
[    5.716163] usbcore: registered new interface driver gtco
[    5.716245] usbcore: registered new interface driver hanwang
[    5.716373] usbcore: registered new interface driver kbtab
[    5.716678] /drivers/input/touchscreen
[    5.716709] of_get_named_gpiod_flags: parsed 'goodix_int' property of node '/soc@03000000/twi@0x05003000/gt911@5d[0]' - s                                                                                                                                             tatus (0)
[    5.829760] usb 2-1: new high-speed USB device number 2 using sunxi-ehci
[    5.846423] usb 3-1: new high-speed USB device number 2 using sunxi-ehci
[    6.567254] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.573677] L1 PageTable Invalid
[    6.577303] 0xaff02000 is not mapped!
[    6.581415] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.587820] L1 PageTable Invalid
[    6.587830] Goodix-TS 4-005d: i2c test failed attempt 1: -70
[    6.597798] 0xaff02000 is not mapped!
[    6.601910] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.608284] L1 PageTable Invalid
[    6.611907] 0xaff02000 is not mapped!
[    6.616019] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.622523] Goodix-TS 4-005d: i2c test failed attempt 2: -70
[    6.637156] L1 PageTable Invalid
[    6.640780] 0xaff02000 is not mapped!
[    6.644890] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.653089] Goodix-TS 4-005d: I2C communication failure: -70
[    6.653823] L1 PageTable Invalid
[    6.653825] 0xaff02000 is not mapped!
[    6.653828] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.670491] L1 PageTable Invalid
[    6.670494] 0xaff02000 is not mapped!
[    6.670497] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.687157] L1 PageTable Invalid
[    6.687160] 0xaff02000 is not mapped!
[    6.687162] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.701921] Goodix-TS: probe of 4-005d failed with error -70
[    6.703824] L1 PageTable Invalid
[    6.703827] 0xaff02000 is not mapped!
[    6.703829] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.720490] L1 PageTable Invalid
[    6.720492] 0xaff02000 is not mapped!
[    6.720495] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.736603] /drivers/input/touchscreen
[    6.737156] L1 PageTable Invalid
[    6.737159] 0xaff02000 is not mapped!
[    6.737161] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.753824] L1 PageTable Invalid
[    6.753826] 0xaff02000 is not mapped!
[    6.753829] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.757048] usb 2-1: New USB device found, idVendor=1a40, idProduct=0101
[    6.757055] usb 2-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    6.757060] usb 2-1: Product: USB 2.0 Hub
[    6.757888] hub 2-1:1.0: USB hub found
[    6.757920] usb 3-1: New USB device found, idVendor=1a86, idProduct=55d5
[    6.757926] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    6.757931] usb 3-1: Product: USB Quad_Serial
[    6.757936] usb 3-1: Manufacturer: wch.cn
[    6.757941] usb 3-1: SerialNumber: 0123456789
[    6.758196] hub 2-1:1.0: 4 ports detected
[    6.763002] usb_ch343 3-1:1.0: ttyCH343USB0: usb to uart device
[    6.763848] usb_ch343 3-1:1.0: USB to GPIO device now attached to ch343_iodev70
[    6.765052] usb_ch343 3-1:1.2: ttyCH343USB1: usb to uart device
[    6.766286] usb_ch343 3-1:1.4: ttyCH343USB2: usb to uart device
[    6.767525] usb_ch343 3-1:1.6: ttyCH343USB3: usb to uart device
[    6.770491] L1 PageTable Invalid
[    6.770494] 0xaff02000 is not mapped!
[    6.770497] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.787156] L1 PageTable Invalid
[    6.787159] 0xaff02000 is not mapped!
[    6.787162] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.803823] L1 PageTable Invalid
[    6.803826] 0xaff02000 is not mapped!
[    6.803829] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.820491] L1 PageTable Invalid
[    6.820494] 0xaff02000 is not mapped!
[    6.820497] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.837157] L1 PageTable Invalid
[    6.837160] 0xaff02000 is not mapped!
[    6.837162] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.853824] L1 PageTable Invalid
[    6.853826] 0xaff02000 is not mapped!
[    6.853829] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.870490] L1 PageTable Invalid
[    6.870493] 0xaff02000 is not mapped!
[    6.870495] DE invalid address: 0xaff02000, data:0x0, id:0x1
[    6.887157] L1 PageTable Invalid

请问这是什么地方的报错？应该怎么解决