> -----Original Message----- > From: Nautiyal, Ankit K <ankit.k.nautiyal@xxxxxxxxx> > Sent: Tuesday, March 9, 2021 10:09 AM > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx; ville.syrjala@xxxxxxxxxxxxxxx; Shankar, Uma > <uma.shankar@xxxxxxxxx>; airlied@xxxxxxxx; jani.nikula@xxxxxxxxxxxxxxx > Subject: [PATCH v3 3/3] drm/i915/display: Configure HDMI2.1 Pcon for FRL only if > Src-Ctl mode is available > > Currently we see only the MAX FRL BW from PCON before going for FRL. > Also add the check if source control mode is supported by the PCON, before starting > configuring PCON for FRL training. > > Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx> > --- > drivers/gpu/drm/i915/display/intel_dp.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c > b/drivers/gpu/drm/i915/display/intel_dp.c > index 2e90359ce21f..8e401d3fd29d 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -2638,7 +2638,8 @@ void intel_dp_check_frl_training(struct intel_dp *intel_dp) > struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); > > /* Always go for FRL training if supported */ > - if (!intel_dp_is_hdmi_2_1_sink(intel_dp) || > + if (!(intel_dp->dpcd[2] & DP_PCON_SOURCE_CTL_MODE) || Would be good to add spec reference as well here. With that added, this is Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx> > + !intel_dp_is_hdmi_2_1_sink(intel_dp) || > intel_dp->frl.is_trained) > return; > > -- > 2.29.2 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
