From: Sidong Yang <[email protected]>, Haneen Mohammed <[email protected]>
When vkms_get_vblank_timestamp() is called very first time without enabling vblank before, vblank time has just intial value and it makes warning message. this patch prevents warning message by setting vblank time to current time. Cc: Daniel Vetter <[email protected]> Cc: Rodrigo Siqueira <[email protected]> Cc: Haneen Mohammed <[email protected]> Cc: Melissa Wen <[email protected]> Signed-off-by: Sidong Yang <[email protected]> --- drivers/gpu/drm/vkms/vkms_crtc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c index ac85e17428f8..09c012d54d58 100644 --- a/drivers/gpu/drm/vkms/vkms_crtc.c +++ b/drivers/gpu/drm/vkms/vkms_crtc.c @@ -86,6 +86,11 @@ static bool vkms_get_vblank_timestamp(struct drm_crtc *crtc, struct vkms_output *output = &vkmsdev->output; struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; + if (!READ_ONCE(vblank->enabled)) { + *vblank_time = ktime_get(); + return true; + } + *vblank_time = READ_ONCE(output->vblank_hrtimer.node.expires); if (WARN_ON(*vblank_time == vblank->time)) -- 2.17.1
