From: Varad Gautam <varad.gau...@collabora.com>
the hardware does not provide interrupts on vblank, so we just send a fake
vblank event on atomic_flush.
Signed-off-by: Varad Gautam <varad.gau...@collabora.com>
---
drivers/gpu/drm/cirrus/cirrus_mode.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c
b/drivers/gpu/drm/cirrus/cirrus_mode.c
index eda3c4d18b37..e777157fe474 100644
--- a/drivers/gpu/drm/cirrus/cirrus_mode.c
+++ b/drivers/gpu/drm/cirrus/cirrus_mode.c
@@ -226,6 +226,23 @@ static void cirrus_crtc_destroy(struct drm_crtc *crtc)
kfree(cirrus_crtc);
}
+static void cirrus_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_pending_vblank_event *event;
+ unsigned long flags;
+
+ if (crtc->state && crtc->state->event) {
+ event = crtc->state->event;
+ crtc->state->event = NULL;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ drm_crtc_send_vblank_event(crtc, event);
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ }
+}
+
/* These provide the minimum set of functions required to handle a CRTC */
static const struct drm_crtc_funcs cirrus_crtc_funcs = {
.gamma_set = cirrus_crtc_gamma_set,
@@ -244,6 +261,7 @@ static const struct drm_crtc_helper_funcs
cirrus_helper_funcs = {
.prepare = cirrus_crtc_prepare,
.commit = cirrus_crtc_commit,
.load_lut = cirrus_crtc_load_lut,
+ .atomic_flush = cirrus_crtc_atomic_flush,
};
static int cirrus_plane_update(struct drm_plane *plane,
--
2.13.1
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