Quoting Kuogee Hsieh (2022-04-25 22:56:35) > Current DP driver implementation has adding safe mode done at > dp_hpd_plug_handle() which is expected to be executed under event > thread context. > > However there is possible circular locking happen (see blow stack trace) > after edp driver call dp_hpd_plug_handle() from dp_bridge_enable() which > is executed under drm_thread context. > > After review all possibilities methods and as discussed on > https://patchwork.freedesktop.org/patch/483155/, supporting EDID > compliance tests in the driver is quite hacky. As seen with other > vendor drivers, supporting these will be much easier with IGT. Hence > removing all the related fail safe code for it so that no possibility > of circular lock will happen. [...] > > Changes in v2: > -- re text commit title > -- remove all fail safe mode > > Signed-off-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> Should add some Fixes tags here, probably for the first introduction of this logic and the one that moved stuff around to try to avoid the lockdep warning.
