Am Dienstag, 25. Juli 2023, 10:02:21 CEST schrieb Christopher Obbard: > Hi Da, Jagan, > > On Tue, 2023-07-25 at 03:39 -0400, Da Xue wrote: > > On Mon, Jul 24, 2023 at 9:55 AM Christopher Obbard > > <chris.obbard@xxxxxxxxxxxxx> wrote: > > > > > > On Wed, 2023-07-19 at 17:51 +0530, Jagan Teki wrote: > > > > The power supply circuit in ROC-RK3399-PC is > > > > > > > > Power Supply (or PPS) => FUSB => MP8859 > > > > > > > > VUBS pin of FUSB and IN pin of MP8859 is supplied via TYPEC_IN. > > > > > > > > The MP8859 operated with 2.8V to 22V supply voltage and typical > > > > applications this supply can be 12V. > > > > > > > > This patch is trying to support the PD by changing the FUSB VBUS supply > > > > to 12V and tune the I2C7 timings from downstream kernel. > > > > > > > > Tested with PD3.0 PPS with supply voltages of 12V/3A and 20V/5A. > > > > > > Hi Jagan, > > > > > > This series works fine with a "dumb" (no PD negotiation) 5.1V Raspberry Pi PSU. > > > > > > It also works fine with a Dell 45W USB-C Laptop Power Supply (model AA45NM170) which provides 5V@3A,9V@3A,15V@3A,20V@2.25A, where Linux master fails and just tells the USB-PD PSU to power-off. > > > > I think this depends on the recent Rockchip TCPM changes. FUSB302 has > > been a pain in the USB or else this platform would have launched a lot > > longer ago. > > Sorry, I was testing this patch on top of next-20230724 which includes https://patchwork.kernel.org/project/linux-rockchip/list/?series=757752: > > 8be558dcffe69b078b34b1fa93b82acaf4ce4957 ("usb: typec: tcpm: add get max power support") > 1e35f074399dece73d5df11847d4a0d7a6f49434 ("usb: typec: tcpm: fix cc role at port reset") > > Can you check if I am missing any other patches ? so I guess the question is, are there any new clues and/or does this patch make the situaton better or worse for the roc-rk3399-pc board as it stands now. Thanks Heiko
