Acked-by: Lyude Paul <lyude@xxxxxxxxxx> On Thu, 2017-08-10 at 18:16 -0700, Dhinakaran Pandiyan wrote: > Dell monitor with a built-in MST branch does not light up on boot > when > connected to a Thinkpad dock. The monitor also does not wake up after > Suspend-to-Idle or dpms off in this configuration. Keeping the AUX > powered up in the D3 power state solved this problem. > > This partially fixes > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90963 > > Cc: Ethan Hsieh <ethan.hsieh@xxxxxxxxxxxxx> > Cc: Lyude <cpaul@xxxxxxxxxx> > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx> > --- > drivers/gpu/drm/i915/intel_dp.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/intel_dp.c > b/drivers/gpu/drm/i915/intel_dp.c > index 76c8a0b..5595367 100644 > --- a/drivers/gpu/drm/i915/intel_dp.c > +++ b/drivers/gpu/drm/i915/intel_dp.c > @@ -2485,7 +2485,11 @@ void intel_dp_sink_dpms(struct intel_dp > *intel_dp, int mode) > return; > > if (mode != DRM_MODE_DPMS_ON) { > - ret = drm_dp_dpcd_writeb(&intel_dp->aux, > DP_SET_POWER, > + if (intel_dp->is_mst) > + ret = drm_dp_dpcd_writeb(&intel_dp->aux, > DP_SET_POWER, > + DP_SET_POWER_D3_AUX_ON); > + else > + ret = drm_dp_dpcd_writeb(&intel_dp->aux, > DP_SET_POWER, > DP_SET_POWER_D3); > } else { > struct intel_lspcon *lspcon = > dp_to_lspcon(intel_dp); -- Cheers, Lyude _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
