From: Jin-young Jeon <jy0.jeon@samsung.com>
Date: Tue, 20 Jun 2017 06:12:46 +0000 (+0900)
Subject: drm/tgm: tdm: add ttrace log to check vsync
X-Git-Tag: submit/tizen/20170710.052339~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eb08d34110dee0b34cce7d75598571e390fc30b1;p=profile%2Fwearable%2Fplatform%2Fkernel%2Flinux-3.18-exynos7270.git

drm/tgm: tdm: add ttrace log to check vsync

This patch is from product kernel.

Change-Id: I46d68956d4cbf196379a3f6037189712248694dd
Signed-off-by: Jin-young Jeon <jy0.jeon@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
---

diff --git a/drivers/gpu/drm/tgm/tdm_irq.c b/drivers/gpu/drm/tgm/tdm_irq.c
index 057200bda70..c2e83ef40ac 100644
--- a/drivers/gpu/drm/tgm/tdm_irq.c
+++ b/drivers/gpu/drm/tgm/tdm_irq.c
@@ -197,6 +197,14 @@ static irqreturn_t tdm_irq_handler(int irq, void *dev_id)
 
 	DRM_DEBUG("%s\n", __func__);
 
+#ifdef CONFIG_ENABLE_DEFAULT_TRACERS
+	if (tracing_is_on()) {
+		static bool t;
+
+		__trace_printk(0, "C|-50|VSYNC|%d\n", t ? --t : ++t);
+	}
+#endif
+
 	spin_lock_irqsave(&drm_dev->vblank_time_lock, irqflags);
 	vblank = &drm_dev->vblank[crtc];