On Tue, Feb 07, 2017 at 05:16:13PM +0800, Shawn Guo wrote:
> From: Shawn Guo <shawn.guo@linaro.org>
> 
> The vblank is mostly CRTC specific and implemented as part of CRTC
> driver.  Let's keep the vblank hooks struct drm_driver for legacy
> drivers, and add corresponding hooks in struct drm_crtc_funcs.  These
> hooks take struct drm_crtc pointer as argument, and will be called by
> core vblank handling code for DRIVER_MODESET drivers.
> 
> The new hooks get plugged into core by adding wrapper functions for
> vblank handling code.  The .get_vblank_counter hook is effectively
> optional, as we provide drm_vblank_no_hw_counter() as the default
> fallback in the wrapper function.
> 
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> ---
>  drivers/gpu/drm/drm_irq.c | 53 +++++++++++++++++++++++++++++++++++++++++------
>  include/drm/drm_crtc.h    | 44 +++++++++++++++++++++++++++++++++++++++
>  include/drm/drm_drv.h     |  9 ++++++++
>  3 files changed, 100 insertions(+), 6 deletions(-)

I had been meaning to do this for a long time myself but never got
around to it. Great stuff.

Acked-by: Thierry Reding <treding@nvidia.com>