From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
DP spec says:
"The Source device shall start sending the idle pattern after
it has cleared the Training_Pattern byte in the DPCD."
Currently we do these in operations in the opposite order.
Swap them around to match the spec.
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp_link_training.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index d8c6d7054d11..2d3396bfc207 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -697,9 +697,9 @@ static bool intel_dp_disable_dpcd_training_pattern(struct intel_dp *intel_dp,
* @intel_dp: DP struct
* @crtc_state: state for CRTC attached to the encoder
*
- * Stop the link training of the @intel_dp port, disabling the test pattern
- * symbol generation on the port and disabling the training pattern in
- * the sink's DPCD.
+ * Stop the link training of the @intel_dp port, disabling the training
+ * pattern in the sink's DPCD, and disabling the test pattern symbol
+ * generation on the port.
*
* What symbols are output on the port after this point is
* platform specific: On DDI/VLV/CHV platforms it will be the idle pattern
@@ -713,10 +713,9 @@ void intel_dp_stop_link_train(struct intel_dp *intel_dp,
{
intel_dp->link_trained = true;
- intel_dp_program_link_training_pattern(intel_dp,
- crtc_state,
- DP_TRAINING_PATTERN_DISABLE);
intel_dp_disable_dpcd_training_pattern(intel_dp, DP_PHY_DPRX);
+ intel_dp_program_link_training_pattern(intel_dp, crtc_state,
+ DP_TRAINING_PATTERN_DISABLE);
}
static bool
--
2.26.2
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