FAILED: patch "[PATCH] drm/i915: tune down the fast link training vs boot fail" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: Daniel Vetter <[email protected]>
Date: Tue, 13 Dec 2016 20:54:14 +0100
Subject: [PATCH] drm/i915: tune down the fast link training vs boot fail
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It's been unfixed since a while and no one is immediately working on this. And we have the FIXME already. And now also a task in the DP team's backlog.

Cc: Linus Torvalds <[email protected]>
Cc: [email protected]
Cc: Ville Syrjälä <[email protected]>
References: https://lists.freedesktop.org/archives/intel-gfx/2016-July/101951.html

index 90283edcafba..d9bc19be855e 100644
@@ -4014,8 +4014,8 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
 		return;
 
 	/* FIXME: we need to synchronize this sort of stuff with hardware
-	 * readout */
-	if (WARN_ON_ONCE(!intel_dp->lane_count))
+	 * readout. Currently fast link training doesn't work on boot-up. */
+	if (!intel_dp->lane_count)
 		return;
 
 	/* if link training is requested we should perform it always */