linux-kernel - [PATCH v4 4/4] drm/i915: Put "cooked" vlank counters in frame CRC lines

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Message-Id: <1470393905-6640-5-git-send-email-tomeu.vizoso@collabora.com>
Date:	Fri,  5 Aug 2016 12:45:05 +0200
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ville Syrjälä 
	<ville.syrjala@...ux.intel.com>,
	Daniel Vetter <daniel.vetter@...el.com>,
	Emil Velikov <emil.velikov@...labora.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
	David Airlie <airlied@...ux.ie>
Subject: [PATCH v4 4/4] drm/i915: Put "cooked" vlank counters in frame CRC lines

Use drm_accurate_vblank_count so we have the full 32 bit to represent
the frame counter and userspace has a simpler way of knowing when the
counter wraps around.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
---

 drivers/gpu/drm/i915/i915_irq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index e5fb9fa86358..0a834303004e 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1496,7 +1496,6 @@ static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
 	struct drm_driver *driver = dev_priv->drm.driver;
 	uint32_t crcs[5];
 	int head, tail, ret;
-	u32 frame;
 
 	spin_lock(&pipe_crc->lock);
 	if (pipe_crc->source) {
@@ -1538,8 +1537,9 @@ static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
 		crcs[2] = crc2;
 		crcs[3] = crc3;
 		crcs[4] = crc4;
-		frame = driver->get_vblank_counter(&dev_priv->drm, pipe);
-		ret = drm_crtc_add_crc_entry(crtc, true, frame, crcs);
+		ret = drm_crtc_add_crc_entry(crtc, true,
+					     drm_accurate_vblank_count(crtc),
+					     crcs);
 		spin_unlock(&crtc->crc.lock);
 		if (!ret)
 			wake_up_interruptible(&crtc->crc.wq);
-- 
2.7.4