Hi Veeraiyan-san, > From: Veeraiyan Chidambaram, Sent: Wednesday, September 11, 2019 10:16 PM > > From: Veeraiyan Chidambaram <veeraiyan.chidambaram@xxxxxxxxxxxx> > > When R-Car Gen3 USB 2.0 is in Gadget mode, if host is detached an interrupt > will be generated and Suspended state bit is set in interrupt status > register. Interrupt handler will call driver->suspend(composite_suspend) > if suspended state bit is set. composite_suspend will call > ffs_func_suspend which will post FUNCTIONFS_SUSPEND and will be consumed > by user space application via /dev/ep0. > > To be able to detect host detach, extend the DVSQ_MASK to cover the > Suspended bit of the DVSQ[2:0] bitfield from the Interrupt Status > Register 0 (INTSTS0) register and perform appropriate action in the > DVST interrupt handler (usbhsg_irq_dev_state). > > Without this commit, disconnection of the phone from R-Car-H3 ES2.0 > Salvator-X CN9 port is not recognized and reverse role switch does > not happen. If phone is connected again it does not enumerate. > > With this commit, disconnection will be recognized and reverse role > switch will happen by a user space application. If phone is connected > again it will enumerate properly and will become visible in the output > of 'lsusb'. > > Signed-off-by: Veeraiyan Chidambaram <veeraiyan.chidambaram@xxxxxxxxxxxx> > Signed-off-by: Eugeniu Rosca <erosca@xxxxxxxxxxxxxx> > --- > v5: No change > v4: https://patchwork.kernel.org/patch/11138205/ Thank you for the patch! As I sent on v4: Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Best regards, Yoshihiro Shimoda
