4.2.8-ckt10 -stable review patch. If anyone has any objections, please let me
know.
---8<------------------------------------------------------------
From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>
commit 9a11d2e7e66b6b8764a2430686b8716637bf812e upstream.
virtio_gpu was failing to send vblank events when using the atomic IOCTL
with the DRM_MODE_PAGE_FLIP_EVENT flag set. This patch fixes each and
enables atomic pageflips updates.
Signed-off-by: Gustavo Padovan <gustavo.pado...@collabora.co.uk>
Signed-off-by: Dave Airlie <airl...@redhat.com>
[ kamal: backport to 4.2-stable: older crtc api ]
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/gpu/drm/virtio/virtgpu_display.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c
b/drivers/gpu/drm/virtio/virtgpu_display.c
index 54b70f1..7f9e96d 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -223,12 +223,23 @@ static int virtio_gpu_crtc_atomic_check(struct drm_crtc
*crtc,
return 0;
}
+static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&crtc->dev->event_lock, flags);
+ if (crtc->state->event)
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+}
+
static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
.enable = virtio_gpu_crtc_enable,
.disable = virtio_gpu_crtc_disable,
.mode_fixup = virtio_gpu_crtc_mode_fixup,
.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
.atomic_check = virtio_gpu_crtc_atomic_check,
+ .atomic_flush = virtio_gpu_crtc_atomic_flush,
};
static bool virtio_gpu_enc_mode_fixup(struct drm_encoder *encoder,
--
2.7.4
