This makes the error message slightly more useful.
Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
---
drivers/gpu/drm/i915/intel_drv.h | 2 ++
drivers/gpu/drm/i915/intel_sprite.c | 6 ++++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 172c10ac92ae..513981751e92 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -565,6 +565,8 @@ struct intel_crtc {
int scanline_offset;
unsigned start_vbl_count;
+ ktime_t start_vbl_time;
+
struct intel_crtc_atomic_commit atomic;
/* scalers available on this crtc */
diff --git a/drivers/gpu/drm/i915/intel_sprite.c
b/drivers/gpu/drm/i915/intel_sprite.c
index 63fba42be2cf..cc0eb3915f1c 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -134,6 +134,7 @@ void intel_pipe_update_start(struct intel_crtc *crtc)
drm_crtc_vblank_put(&crtc->base);
+ crtc->start_vbl_time = ktime_get();
crtc->start_vbl_count = dev->driver->get_vblank_counter(dev, pipe);
trace_i915_pipe_update_vblank_evaded(crtc, min, max,
@@ -160,8 +161,9 @@ void intel_pipe_update_end(struct intel_crtc *crtc)
local_irq_enable();
if (crtc->start_vbl_count && crtc->start_vbl_count != end_vbl_count)
- DRM_ERROR("Atomic update failure on pipe %c (start=%u
end=%u)\n",
- pipe_name(pipe), crtc->start_vbl_count,
end_vbl_count);
+ DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u)
time %lld us\n",
+ pipe_name(pipe), crtc->start_vbl_count, end_vbl_count,
+ ktime_us_delta(ktime_get(), crtc->start_vbl_time));
}
static void
--
2.1.0
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