From 85a62bf9d8ef8d533635270ae985281c58e8c974 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 1 Sep 2015 12:15:33 +0200 Subject: [PATCH] drm/i915: Also record time difference if vblank evasion fails, v2. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This makes the error message slightly more useful. Changes since v1: - Use ktime_get() while irqs are still disabled. (vsyrjala) Signed-off-by: Maarten Lankhorst Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_drv.h | 2 ++ drivers/gpu/drm/i915/intel_sprite.c | 7 +++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 8f8d320..090d67b 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -564,6 +564,8 @@ 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 c35c233..ca7e264 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, @@ -154,14 +155,16 @@ void intel_pipe_update_end(struct intel_crtc *crtc) struct drm_device *dev = crtc->base.dev; enum pipe pipe = crtc->pipe; u32 end_vbl_count = dev->driver->get_vblank_counter(dev, pipe); + ktime_t end_vbl_time = ktime_get(); trace_i915_pipe_update_end(crtc, end_vbl_count); 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(end_vbl_time, crtc->start_vbl_time)); } static void -- 2.7.4