Atm we may retrain the DP link even if the CRTC is inactive through HPD work->intel_dp_check_link_status(). This in turn can lock up the PHY (at least on BYT), since the DP port is disabled.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81948 Signed-off-by: Imre Deak <imre.d...@intel.com> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com> --- drivers/gpu/drm/i915/intel_dp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index ee982fc..8c1d4e1 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3553,6 +3553,9 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) if (WARN_ON(!intel_encoder->base.crtc)) return; + if (!to_intel_crtc(intel_encoder->base.crtc)->active) + return; + /* Try to read receiver status if the link appears to be up */ if (!intel_dp_get_link_status(intel_dp, link_status)) { return; -- 1.8.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
