On 07/07/2021 01:00, Bjorn Andersson wrote:
In order to perform link training on 4 lanes we need to reset the PHY_MODE_CTRL with only DP_MODE.
We're only the two lanes for USB on sm8250 and at the moment only USB works - not dp on 8250.
Perhaps you've discovered why the DP times out on 8250..
In my efforts on sc8180x I skipped the disable/enable in switch_set() (I believe because I didn't have the init_count check...) and then in qcom_qmp_phy_configure_dp_mode() I issue a reset when we're heading to 4 lanes. Perhaps we can do the disable/enable and achieve the same thing, but as written here you won't get 4 lanes... I will do some more testing.
Do you have a commit I can cherry pick ? Might be worth testing out with tcpm + dp on the sm8250 if its working for you on sc8180x
