[PATCH] drm: vblank: Fix vblank timestamp update

[Laurent Pinchart]

Commit 3fcdcb270936 ("drm/vblank: Switch to bool in_vblank_irq in
get_vblank_timestamp") inverted a condition by mistake that resulted in
vblank timestamps always being 0 on hardware without a vblank counter.
Fix it.

Fixes: 3fcdcb270936 ("drm/vblank: Switch to bool in_vblank_irq in get_vblank_timestamp")
Suggested-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
---
 drivers/gpu/drm/drm_vblank.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Daniel,

The offending commit is in Dave's master branch, scheduled for merge in
v4.13-rc1. How would you like to handle this one ?

diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 05d043e9219f..bfe86fa2d3b1 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -277,7 +277,7 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe,
 	 * Otherwise reinitialize delayed at next vblank interrupt and assign 0
 	 * for now, to mark the vblanktimestamp as invalid.
 	 */
-	if (!rc && in_vblank_irq)
+	if (!rc && !in_vblank_irq)
 		t_vblank = (struct timeval) {0, 0};
 
 	store_vblank(dev, pipe, diff, &t_vblank, cur_vblank);
-- 
Regards,

Laurent Pinchart