Hi Roger, William Wu <william.wu@xxxxxxxxxxxxxx> writes: > The dwc3_core_init() gets the PHYs and initializes the PHYs with > the usb_phy_init() and phy_init() functions before initializing > core, and power on the PHYs after core initialization is done. > > However, some platforms (e.g. Rockchip RK3399 DWC3 with Type-C > USB3 PHY), it needs to do some special operation while power on > the Type-C PHY before initializing DWC3 core. It's because that > the RK3399 Type-C PHY requires to hold the DWC3 controller in > reset state to keep the PIPE power state in P2 while configuring > the Type-C PHY, otherwise, it may cause waiting for the PIPE ready > timeout. In this case, if we power on the PHYs after the DWC3 core > initialization is done, the core will be reset to uninitialized > state after power on the PHYs. > > Fix this by powering on the PHYs before initializing core. And > because the GUID register may also be reset in this case, so we > need to configure the GUID register after powering on the PHYs. > > Signed-off-by: William Wu <william.wu@xxxxxxxxxxxxxx> does this cause any regressions for your boards? -- balbi
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