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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-06-08 15:18:55 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-06-10 17:55:05 +0300
commit84d9a4a28801fddb88dc61487089ed0ae2ccef78 (patch)
tree5b6dd3219f31891cfc2f7131563aa054c6d428e2 /drivers/gpu/drm
parent5e84c2690b805caeff3b4c6c9564c7b8de54742d (diff)
downloadlinux-84d9a4a28801fddb88dc61487089ed0ae2ccef78.tar.xz
drm/arc: Actually bother with handling atomic events.
The drm core has a nice ready-made helper for exactly the simple case where it should fire on the next vblank. Note that arming the vblank event in _begin is probably too early, and might easily result in the vblank firing too early, before the new set of planes are actually disabled. But that's kinda a minor issue compared to just outright hanging userspace. v2: Be more robust and either arm, when the CRTC is on, or just send the event out right away. v3: Just unconditionally send out the event directly, for safety - arcpgu doesn't even have vblank support ... Cc: Carlos Palminha <palminha@synopsys.com> Cc: Alexey Brodkin <abrodkin@synopsys.com> Cc: linux-snps-arc@lists.infradead.org Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465388359-8070-3-git-send-email-daniel.vetter@ffwll.ch Link: http://patchwork.freedesktop.org/patch/msgid/1465388359-8070-4-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/arc/arcpgu_crtc.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/gpu/drm/arc/arcpgu_crtc.c b/drivers/gpu/drm/arc/arcpgu_crtc.c
index d5ca0c280e68..ee0a61c2861b 100644
--- a/drivers/gpu/drm/arc/arcpgu_crtc.c
+++ b/drivers/gpu/drm/arc/arcpgu_crtc.c
@@ -145,16 +145,14 @@ static int arc_pgu_crtc_atomic_check(struct drm_crtc *crtc,
static void arc_pgu_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
- struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
- unsigned long flags;
-
- if (crtc->state->event) {
- struct drm_pending_vblank_event *event = crtc->state->event;
+ struct drm_pending_vblank_event *event = crtc->state->event;
+ if (event) {
crtc->state->event = NULL;
- event->pipe = drm_crtc_index(crtc);
- WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, event);
+ spin_unlock_irq(&crtc->dev->event_lock);
}
}