From 14631e9d740a2353c4b5734716c84a84e0b1c075 Mon Sep 17 00:00:00 2001 From: Shubhangi Shrivastava Date: Wed, 14 Oct 2015 14:56:49 +0530 Subject: [PATCH] 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 Signed-off-by: Shubhangi Shrivastava Reviewed-by: Sonika Jindal --- drivers/gpu/drm/i915/intel_dp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 92504fce53ae..e35a0b8284e5 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -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); -- 2.20.1