Commit 14631e9d authored Oct 14, 2015 by Shubhangi Shrivastava Committed by Daniel Vetter Nov 17, 2015

drm/i915: force link training when requested by Sink



Compliance test 4.3.1.11 requires source to perform link training
always if the automated test requests for it. This patch
enforces this requirement.

Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 4df6960e

drivers/gpu/drm/i915/intel_dp.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -4316,7 +4316,9 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
		DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
		}

		if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) {
		/* if link training is requested we should perform it always */
		if ((intel_dp->compliance_test_type == DP_TEST_LINK_TRAINING) \|\|
		(!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count))) {
		DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
		intel_encoder->base.name);
		intel_dp_start_link_train(intel_dp);