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[07/10] drm/atomic: Handle 64-bit return from drm_crtc_vblank_count()

Message ID 20180203051302.9974-7-dhinakaran.pandiyan@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dhinakaran Pandiyan Feb. 3, 2018, 5:12 a.m. UTC 
570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the
return type for drm_crtc_vblank_count() to u64.

The flip ioctl receives a 32-bit target sequence from user space and is
compared against the current sequence from drm_crtc_vblank_count(). So,
typecast return from drm_crtc_vblank_count() explicitly to add clarity.

__drm_crtcs_state.last_vblank_count however only ever stores the value from
drm_crtc_vblank_count() and can be upgraded to u64.

Cc: Keith Packard <keithp@keithp.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
---
 drivers/gpu/drm/drm_plane.c | 2 +-
 include/drm/drm_atomic.h    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 22b54663b6e7..09de6ecb3968 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -948,7 +948,7 @@  int drm_mode_page_flip_ioctl(struct drm_device *dev,
 		if (r)
 			return r;
 
-		current_vblank = drm_crtc_vblank_count(crtc);
+		current_vblank = (u32)drm_crtc_vblank_count(crtc);
 
 		switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
 		case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index cf13842a6dbd..2c711a24c80c 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -154,7 +154,7 @@  struct __drm_crtcs_state {
 	struct drm_crtc *ptr;
 	struct drm_crtc_state *state, *old_state, *new_state;
 	s32 __user *out_fence_ptr;
-	unsigned last_vblank_count;
+	u64 last_vblank_count;
 };
 
 struct __drm_connnectors_state {