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Make sure we have a HDMI sink connected > after the PCON before doing YCbCr 4:2:0 output. > > Cc: Nicolas Frattaroli > Signed-off-by: Ville Syrjälä LGTM. Reviewed-by: Ankit Nautiyal > --- > drivers/gpu/drm/i915/display/intel_dp.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c > index 86319bf09a19..ce40d38557e1 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -1358,10 +1358,15 @@ intel_dp_sink_format_valid(struct intel_connector *connector, > const struct drm_display_mode *mode, > enum intel_output_format sink_format) > { > + struct intel_dp *intel_dp = intel_attached_dp(connector); > const struct drm_display_info *info = &connector->base.display_info; > > switch (sink_format) { > case INTEL_OUTPUT_FORMAT_YCBCR420: > + if (intel_dp->dfp.min_tmds_clock && > + !intel_dp_has_hdmi_sink(intel_dp)) > + return MODE_NO_420; > + > if (!connector->base.ycbcr_420_allowed || > !drm_mode_is_420(info, mode)) > return MODE_NO_420;