Quoting khs...@codeaurora.org (2021-10-07 13:28:12) > On 2021-10-07 13:06, Bjorn Andersson wrote: > > On Thu 07 Oct 12:51 PDT 2021, khs...@codeaurora.org wrote: > > > >> On 2021-10-06 10:31, Bjorn Andersson wrote: > >> > On Wed 06 Oct 08:37 PDT 2021, khs...@codeaurora.org wrote: > >> > > >> > > On 2021-10-05 19:10, Bjorn Andersson wrote: > >> > > > On Tue 05 Oct 16:04 PDT 2021, khs...@codeaurora.org wrote: > >> > > > > >> > > > > On 2021-10-05 15:36, Stephen Boyd wrote: > >> > > > > > Quoting Bjorn Andersson (2021-10-05 14:40:38) > >> > > > > > > On Tue 05 Oct 11:45 PDT 2021, Stephen Boyd wrote: > >> > > > > > > > >> > > > > > > > Quoting Bjorn Andersson (2021-10-04 19:37:50) > >> > > > > > > > > Found in the middle of a patch from Sankeerth was the > >> > > > > > > > > reduction of the > >> > > > > > > > > INIT_SETUP timeout from 10s to 100ms. Upon INIT_SETUP > >> > > > > > > > > timeout the host > >> > > > > > > > > is initalized and HPD interrupt start to be serviced, so > >> > > > > > > > > in the case of > >> > > > > > > > > eDP this reduction improves the user experience > >> > > > > > > > > dramatically - i.e. > >> > > > > > > > > removes 9.9s of bland screen time at boot. > >> > > > > > > > > > >> > > > > > > > > Suggested-by: Sankeerth Billakanti > >> > > > > > > > > <sbill...@codeaurora.org> > >> > > > > > > > > Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org> > >> > > > > > > > > --- > >> > > > > > > > > >> > > > > > > > Any Fixes tag? BTW, the delay design is pretty convoluted. I > >> > > > > > > > had to go > >> > > > > > > > re-read the code a couple times to understand that it's > >> > > > > > > > waiting 100ms > >> > > > > > > > times the 'delay' number. Whaaaaat? > >> > > > > > > > > >> > > > > > > > >> > > > > > > I assume you're happy with the current 10s delay on the current > >> > > > > > > devices, so I don't think we should push for this to be > >> > > > > > > backported. > >> > > > > > > I have no need for it to be backported on my side at least. > >> > > > > > > > >> > > > > > > >> > > > > > Sure. Fixes tag != backported to stable trees but it is close. > >> > > > > > > >> > > > > > > > Reviewed-by: Stephen Boyd <swb...@chromium.org> > >> > > > > > > > >> > > > > dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 1); <== to 100ms > >> > > > > > >> > > > > This patch will prevent usb3 from working due to dp driver > >> > > > > initialize phy > >> > > > > earlier than usb3 which cause timeout error at power up usb3 phy > >> > > > > when both > >> > > > > edp and dp are enabled. > >> > > > > >> > > > Can you please help me understand what you mean here, I use this on > >> > > > my > >> > > > sc8180x with both eDP and USB-C/DP right now. What is it that doesn't > >> > > > work? Or am I just lucky in some race condition? > >> > > > > >> > > > Thanks, > >> > > > Bjorn > >> > > > > >> > > The problem is seen at sc7280. > >> > > Apple dongle have both hdmi and usb port. > >> > > plug Apple dongle into type-c, then plug DP into apple's hdmi port > >> > > and usb > >> > > mouse into apple's usb port. > >> > > If edp enabled at this time, then usb mouse will not work due to > >> > > timeout at > >> > > phy power up. > >> > > > >> > > >> > Okay, so you're saying that if the DP driver invokes phy_power_on() > >> > before the USB driver does, USB initialization fails (or at least USB > >> > doesn't work)? > >> > >> if dp driver call qcom_qmp_phy_init() before usb3 call > >> qcom_qmp_phy_init(), > >> usb3 driver will timeout at readl_poll_timeout(status, val, (val & > >> mask) == > >> ready, 10, PHY_INIT_COMPLETE_TIMEOUT) of qcom_qmp_phy_power_on(). > > > > Thanks, I will try to reproduce this on my side. So the 10 seconds here > > is strictly to give good enough time for the dwc3 driver to probe... > > > > Any idea why you're saying that this is specific to sc7280, what > > changed > > from sc7180? > > I did not have sc7180 with edp before so that i am not sure it will > happen on sc7180 or not. > The usb3 does not work when both edp and dp enabled I just seen at > sc7280. > Current at sc7280 EC is not boot up correctly when system power up. > I have to manual reboot EC from linux kernel shell before DP/usb3 can > work. > I am not sure this contribute to this problem or not. >
Can you make the usb driver into a module and only load that module later in boot after the DP driver calls qcom_qmp_phy_init()? That would be an easy way to move usb probe after DP probe and expose this problem.
