570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the
return type for drm_crtc_vblank_count() to u64. This could cause
potential problems if the return value is used in arithmetic operations
with a 32-bit reference HW vblank count. Explicitly typecasting this
down to u32 either fixes a potential problem or serves to add clarity in
case the implicit typecasting was already correct.

Cc: Keith Packard <kei...@keithp.com>
Cc: Thierry Reding <tred...@nvidia.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
 drivers/gpu/drm/tegra/dc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index b8403ed48285..49df2db2ad46 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1359,7 +1359,7 @@ static u32 tegra_dc_get_vblank_counter(struct drm_crtc 
                return host1x_syncpt_read(dc->syncpt);
        /* fallback to software emulated VBLANK counter */
-       return drm_crtc_vblank_count(&dc->base);
+       return (u32)drm_crtc_vblank_count(&dc->base);
 static int tegra_dc_enable_vblank(struct drm_crtc *crtc)

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