On Fri, 2021-10-15 at 15:10 +0300, Imre Deak wrote: > Reading out the DP encoders' DPCD during booting or resume is only > required for enabled encoders: such encoders may be modesetted during > the initial commit and the link training this involves depends on an > initialized DPCD. For DDI encoders reading out the DPCD is skipped, do > the same on pre-DDI platforms.
Missing fixes tag > > Cc: José Roberto de Souza <[email protected]> > Signed-off-by: Imre Deak <[email protected]> > --- > drivers/gpu/drm/i915/display/intel_dp.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c > b/drivers/gpu/drm/i915/display/intel_dp.c > index 9d8132dd4cc5a..23de500d56b52 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -2007,6 +2007,9 @@ void intel_dp_sync_state(struct intel_encoder *encoder, > { > struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > > + if (!crtc_state) > + return; crtc_state is not used > + > /* > * Don't clobber DPCD if it's been already read out during output > * setup (eDP) or detect.
