Re: [PATCH v4 12/18] usb: typec: qcom: Add Qualcomm PMIC TCPM support

Jianhua Lu
2023-03-24T01:13:51Z

On Fri, Mar 24, 2023 at 12:53:09AM +0000, Bryan O'Donoghue wrote:
> On 24/03/2023 00:43, Jianhua Lu wrote:
> >> Can you show the printout of *(pmic_typec->base + TYPEC_SM_STATUS_REG) ?
> > [ 53.120005] hub 1-1:1.0: 4 ports detected
> > [ 58.675134] typec base is 0x1500
> > [ 58.675148] TYPEC_SM_STATUS_REG is 0xa
> > [ 58.675153] typec status reg is 0x150a
> > It should be correct.
> >> And can you check your schematics and verify VBUS is supplied by
> >> pm8150b_vbus and not say by an external IC ?
> > I haven't schematics, so I can only use hacking code to test it.
>
> Could you show the state of TYPEC_MISC_STATUS_REG @ 0x0b ?
when connected to usb-c, it outputs:
[ 47.111552] debug: typec misc status is 0xc0

when disconnected to usb-c, it outputs:
[ 64.061706] debug: typec misc status is 0x42
>
> I wonder if BIT(5) TYPEC_VBUS_DETECT is set ?
>
> BTW what sort of device have you connected here and is it self-powered ?
It is a usb-c to 4-usb host hub without external supplies.
>
> ---
> bod