[PATCH v2 6.18.y 4/5] drm/atomic: Increase timeout in drm_atomic_helper_wait_for_vblanks()

[w15303746062]

From: Thomas Zimmermann <tzimmermann@xxxxxxx>

Increase the timeout for vblank events from 100 ms to 1000 ms. This
is the same fix as in commit f050da08a4ed ("drm/vblank: Increase
timeout in drm_wait_one_vblank()") for another vblank timeout.

After merging generic DRM vblank timers [1] and converting several
DRM drivers for virtual hardware, these drivers synchronize their
vblank events to the display refresh rate. This can trigger timeouts
within the DRM framework.

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Link: https://lore.kernel.org/dri-devel/20250904145806.430568-1-tzimmermann@xxxxxxx/ # [1]
Reported-by: syzbot+fcede535e7eb57cf5b43@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://lore.kernel.org/dri-devel/69381d6c.050a0220.4004e.0017.GAE@xxxxxxxxxx/
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Fixes: 74afeb812850 ("drm/vblank: Add vblank timer")
Link: https://patch.msgid.link/20251209143325.102056-1-tzimmermann@xxxxxxx
(cherry picked from commit 79ae8510b5b81b9500370f89c619b50ca9c0990f)
Signed-off-by: Mingyu Wang <25181214217@xxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/drm_atomic_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index d5ebe6ea0acb..f9d328dcaed8 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1837,7 +1837,7 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
 		ret = wait_event_timeout(dev->vblank[i].queue,
 					 state->crtcs[i].last_vblank_count !=
 						drm_crtc_vblank_count(crtc),
-					 msecs_to_jiffies(100));
+					 msecs_to_jiffies(1000));
 
 		WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
 		     crtc->base.id, crtc->name);
-- 
2.34.1