Commit 02196c77 authored Aug 06, 2015 by Mika Kuoppala Committed by Daniel Vetter Aug 14, 2015

drm/i915: Spam less on dp aux send/receive problems



If we encounter frequent problems with dp aux channel
communications, we end up spamming the dmesg with the
exact similar trace and status.

Inject a new backtrace only if we have new information
to share as otherwise we flush out all other important
stuff.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 842315ee

drivers/gpu/drm/i915/intel_dp.c

+9 −2

Original line number	Diff line number	Diff line
		@@ -849,8 +849,15 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
		}

		if (try == 3) {
		static u32 last_status = -1;
		const u32 status = I915_READ(ch_ctl);

		if (status != last_status) {
		WARN(1, "dp_aux_ch not started status 0x%08x\n",
		I915_READ(ch_ctl));
		status);
		last_status = status;
		}

		ret = -EBUSY;
		goto out;
		}