From 539d97d259f42ce9a453497c48322c7a24a67089 Mon Sep 17 00:00:00 2001 From: Sedat Dilek Date: Wed, 27 Feb 2013 23:48:45 +0100 Subject: [PATCH] drm/i915: Add some debugging to intel_dp_aux_wait_done() Patch from [1]. [1] https://patchwork.kernel.org/patch/2192721/ --- drivers/gpu/drm/i915/intel_dp.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 01c4ec4..a31c6e1 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -338,9 +338,11 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq) msecs_to_jiffies(10)); else done = wait_for_atomic(C, 10) == 0; - if (!done) - DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n", - has_aux_irq); + if (!done) { + status = I915_READ_NOTRACE(ch_ctl); + DRM_ERROR("dp aux hw did not signal timeout (has irq: %i), status=%08x!\n", + has_aux_irq, status); + { #undef C return status; -- 1.8.1.4