drm/exynos: add atomic_check callback to exynos_crtc

Some CRTCs needs mode validation, this patch adds neccessary
callback to Exynos DRM framework. It is called from DRM core
via atomic_check helper for drm_crtc.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 638fc43079a8..f1eda7fa4e3c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -89,6 +89,7 @@ struct exynos_drm_plane {
  * @disable_vblank: specific driver callback for disabling vblank interrupt.
  * @wait_for_vblank: wait for vblank interrupt to make sure that
  *      hardware overlay is updated.
+ * @atomic_check: validate state
  * @atomic_begin: prepare a window to receive a update
  * @atomic_flush: mark the end of a window update
  * @update_plane: apply hardware specific overlay data to registers.
@@ -108,6 +109,8 @@ struct exynos_drm_crtc_ops {
         int (*enable_vblank)(struct exynos_drm_crtc *crtc);
         void (*disable_vblank)(struct exynos_drm_crtc *crtc);
         void (*wait_for_vblank)(struct exynos_drm_crtc *crtc);
+        int (*atomic_check)(struct exynos_drm_crtc *crtc,
+                            struct drm_crtc_state *state);
         void (*atomic_begin)(struct exynos_drm_crtc *crtc,
                               struct exynos_drm_plane *plane);
         void (*update_plane)(struct exynos_drm_crtc *crtc,