[问答]

如何将Type-C改为普通USB？

3767 RK3399

问答对人有帮助，内容完整，我也想知道答案 0 如何将Type-C改为普通USB？ 0
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答案对人有帮助，有参考价值 0 CPU：RK3399 系统：Android 7.1.2 为了降低成本，主板将Type-C改为MicroUSB接口，节省了fu*302芯片参考Rockchip的官方文档第4部分：Micro USB2.0 OTG DTS配置 RKDocs/common/u/Rockchip-Developer-Guide-Linux4.4-RK3399-USB-DTS-CN.pdf &tcphy0 { ; }; &u2phy0 { ;/ Micro USB2 PHY删除了extcon属性/ otg-vbus-gpios = ;/ Vbus GPIO配置/ u2phy0_otg: otg-port {/文档中错误写成了u2phy1_otg / ; }; ...... }; &u*drd3_0 { extcon = ;/ Micro USB3控制器的extcon属性引用u2phy0 / ; }; &u*drd_dwc3_0 { ;/ Micro USB3控制器的dr_mode配置为otg / ;/ maximum-speed属性配置为high-speed / phys = ;/ phys属性只引用USB2 PHY节点/ ; ; }; 按照文档中说明，修改这部分就可以了，但是编译内核部分烧录后，不能进安卓系统，串口一直循环打印如下： [9.878630] init: Starting service'surfaceflinger'... [10.294620] init: Service'surfaceflinger'(pid532) killed by signal6 [10.294664] init: Service'surfaceflinger'(pid532) killing any childreninprocess group [10.294709] init: Service'zygote' ieing killed... [10.356365] init: Service'zygote'(pid254) killed by signal9 [10.356441] init: Service'zygote'(pid254) killing any childreninprocess group [10.356634] init: write_file: Unable to open'/sys/android_power/request_state': No such file or directory [10.356778] init: write_file: Unable to write to'/sys/power/state': Invalid argument [10.356805] init: Service'audioserver' ieing killed... [10.357239] init: Service'cameraserver' ieing killed... [10.357327] init: Service'media' ieing killed... [10.357454] init: Service'netd' ieing killed... [10.358943] init: Starting service'zygote'... [10.364342] init: Service'audioserver'(pid299) killed by signal9 [10.364427] init: Service'audioserver'(pid299) killing any childreninprocess group [10.365879] init: Starting service'audioserver'... [10.369573] init: Service'netd'(pid310) killed by signal9 [10.369677] init: Service'netd'(pid310) killing any childreninprocess group [10.370582] init: Untracked pid575killed by signal9 [10.374127] init: Service'media'(pid297) killed by signal9 [10.374192] init: Service'media'(pid297) killing any childreninprocess group [10.375119] init: Service'cameraserver'(pid300) killed by signal9 [10.375158] init: Service'cameraserver'(pid300) killing any childreninprocess group [10.376450] init: Starting service'media'... [10.378976] init: Starting service'cameraserver'... [10.382610] init: couldn't write 580 to /dev/cpuset/camera-daemon/tasks: No such file or directory [12.079202] init: Starting service'netd'... 开始怀疑是因为没有全部编译的问题，但是全部编译烧录后，还是不能开机，一直提示找不到drm device，串口一直循环打印如下： __bionic_open_tzdata: couldn't find any tzdata when looking for GMT! Starting recovery (pid185) on Fri Jan18 08:52:30 2013 bootmode = emmc recovery filesystem table ========================= 0/mnt/internal_sd vfat /dev/block/platform/fe330000.sdhci/by-name/user0 1/mnt/external_sd vfat /dev/block/mmcblk0p10 2/system ext4 /dev/block/platform/fe330000.sdhci/by-name/system0 3/cache ext4 /dev/block/platform/fe330000.sdhci/by-name/cache0 4/metadata ext4 /dev/block/platform/fe330000.sdhci/by-name/metadata0 5/data ext4 /dev/block/platform/fe330000.sdhci/by-name/userdata0 6/cust ext4 /dev/block/platform/fe330000.sdhci/by-name/cust0 7/custom ext4 /dev/block/platform/fe330000.sdhci/by-name/custom0 8/misc emmc /dev/block/platform/fe330000.sdhci/by-name/misc0 9/uboot emmc /dev/block/platform/fe330000.sdhci/by-name/uboot0 10/charge emmc /dev/block/platform/fe330000.sdhci/by-name/charge0 11/resource emmc /dev/block/platform/fe330000.sdhci/by-name/resource0 12/parameter emmc /dev/block/platform/fe330000.sdhci/by-name/parameter0 13/boot emmc /dev/block/platform/fe330000.sdhci/by-name/boot0 14/recovery emmc /dev/block/platform/fe330000.sdhci/by-name/recovery0 15/backup emmc /dev/block/platform/fe330000.sdhci/by-name/backup0 16/trust emmc /dev/block/platform/fe330000.sdhci/by-name/trust0 17/baseparameter emmc /dev/block/platform/fe330000.sdhci/by-name/baseparameter0 18/frp emmc /dev/block/platform/fe330000.sdhci/by-name/frp0 19/tmp ramdisk ramdisk0 emmc_pointis/dev/block/mmcblk1 sd_pointis(null) sd_point_2is(null) I:InternalSD_ROOT: /mnt/internal_sd I:ExternalSD_ROOT: /mnt/external_sd read cmdline [4.309235] fs_mgr: Warning: unknown flag resize I:Boot command: boot-recovery I:Got argumentsfromboot message [4.311229] fs_mgr: Warning: unknown flag resize === startvoiddumpCmdArgs(int,char):296=== argv[0] = recovery. argv[1] = --wipe_all. localeis[en_US] stageis[] reasonis[(null)] cannot find/open a drm device: No such file or directory cannot open fb0: No such file or directory [4.352842] init: Service'recovery'(pid185) killed by signal11 [4.352952] init: Service'recovery'(pid185) killing any childreninprocess group [9.358734] init: Starting service'recovery'... 查看dts文件，里面还有一个地方&cdn_dp使用了fu*0，屏蔽此处即可开机 &cdn_dp { ; extcon = ; phys = ; }; 最后建议把i2c中与fu302通讯的部分也disable掉，此处不改也没有问题，只是i2c不通，但可以正常开机。 fu0: fu*30x@22{ ; reg = <0x22>; ; pinctrl-0= ; int-n-gpios = ; vbus-5v-gpios = ; ; }; b1e03227fa9720da4fde362389b7768.png (3.38 MB, 下载次数: 0) 2021-2-17 10:57 上传

2022-3-7 13:44:56 评论举报彭小海