On Thu, 14 Jan 2016 15:20:47 +0100, Daniel Vetter wrote:
Ugh. Oh well, there's not really anything we can do in core nore helpers to make this easier for drivers. This really only can be fixed sensibly at the hardware level.
So yeah I think exposing framebuffer_changed as a helper is the way to go here.
OK, here's a series to do that. I also added a comment to rockchip_atomic_wait_for_complete() explaining why we can't use drm_atomic_helper_wait_for_vblanks().
John Keeping (3): drm/atomic-helper: Export framebuffer_changed() drm/rockchip: don't wait for vblank if fb hasn't changed drm/rockchip: explain why we can't wait_for_vblanks
drivers/gpu/drm/drm_atomic_helper.c | 24 ++++++++++++++++++++---- drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 14 ++++++++++++-- include/drm/drm_atomic_helper.h | 4 ++++ 3 files changed, 36 insertions(+), 6 deletions(-)