[PATCH] drm/amd/display: Use div_u64 for flip timestamp ns to ms

[Nicholas Kazlauskas]

Resolves __udivdi3 missing errors when building for i386.

Fixes: 6378ef012ddc ("drm/amd/display: Add below the range support for FreeSync")

Change-Id: I4ded5790160054e6908367f20a63257225517714
Cc: Leo Li <sunpeng.li at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e16e62139ec3..920649332055 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4550,6 +4550,7 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
 			      struct dc_state *state)
 {
 	unsigned long flags;
+	uint64_t timestamp_ns;
 	uint32_t target_vblank;
 	int r, vpos, hpos;
 	struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
@@ -4612,7 +4613,9 @@ static void amdgpu_dm_do_flip(struct drm_crtc *crtc,
 	addr.address.grph.addr.low_part = lower_32_bits(afb->address);
 	addr.address.grph.addr.high_part = upper_32_bits(afb->address);
 	addr.flip_immediate = async_flip;
-	addr.flip_timestamp_in_us = ktime_get_ns() / 1000;
+
+	timestamp_ns = ktime_get_ns();
+	addr.flip_timestamp_in_us = div_u64(timestamp_ns, 1000);
 
 
 	if (acrtc->base.state->event)
-- 
2.17.1