From d60233b418f2edc18790a92e50e5b4d1dc44244a Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 31 Jan 2014 09:29:31 +0000 Subject: [PATCH] drm/i915/dp: Print out link capabilities before rejecting a mode --- drivers/gpu/drm/i915/intel_dp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 0ef269053751..69edec20ad2a 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -175,6 +175,10 @@ intel_dp_mode_valid(struct drm_connector *connector, max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); mode_rate = intel_dp_link_required(target_clock, 18); + DRM_DEBUG_KMS("mode %s: maximum link clock %d with %d lanes," + " giving a maximum dot clock of %d but mode requires %d\n", + max_link_clock, max_lanes, max_rate, mode_rate); + if (mode_rate > max_rate) return MODE_CLOCK_HIGH; -- 1.9.rc1