mirror of https://gitee.com/openkylin/linux.git
drm/imx: notify drm core before sending event during crtc disable
Notify drm core before sending pending events during crtc disable.
This fixes the first event after disable having an old stale timestamp
by having drm_crtc_vblank_off update the timestamp to now.
This was seen while debugging weston log message:
Warning: computed repaint delay is insane: -8212 msec
This occurred due to:
1. driver starts up
2. fbcon comes along and restores fbdev, enabling vblank
3. vblank_disable_fn fires via timer disabling vblank, keeping vblank
seq number and time set at current value
(some time later)
4. weston starts and does a modeset
5. atomic commit disables crtc while it does the modeset
6. ipu_crtc_atomic_disable sends vblank with old seq number and time
Fixes: a474478642
("drm/imx: fix crtc vblank state regression")
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
parent
4b972a01a7
commit
78c68e8f5c
drivers/gpu/drm/imx
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@ -91,14 +91,14 @@ static void ipu_crtc_atomic_disable(struct drm_crtc *crtc,
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ipu_dc_disable(ipu);
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ipu_prg_disable(ipu);
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drm_crtc_vblank_off(crtc);
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spin_lock_irq(&crtc->dev->event_lock);
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if (crtc->state->event) {
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drm_crtc_send_vblank_event(crtc, crtc->state->event);
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crtc->state->event = NULL;
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}
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spin_unlock_irq(&crtc->dev->event_lock);
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drm_crtc_vblank_off(crtc);
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}
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static void imx_drm_crtc_reset(struct drm_crtc *crtc)
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