[PATCH] drm/amd/display: Fix 64-bit division for 32-bit builds

[sunpeng.li at amd.com]

From: Ken Chalmers <ken.chalmers at amd.com>

[Why]
32-bit builds break when doing 64-bit division directly.

[How]
Use the div_u64() function instead to perform the division.

Fixes: https://lists.freedesktop.org/archives/dri-devel/2018-December/201008.html
Signed-off-by: Ken Chalmers <ken.chalmers at amd.com>
Reviewed-by: Leo Li <sunpeng.li at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c b/drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c
index 5c629ae..8b5ce55 100644
--- a/drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c
+++ b/drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c
@@ -94,7 +94,7 @@ static void program_pix_dur(struct timing_generator *tg, uint32_t pix_clk_100hz)
 	if (pix_clk_100hz == 0)
 		return;
 
-	pix_dur = 10000000000ull / pix_clk_100hz;
+	pix_dur = div_u64(10000000000ull, pix_clk_100hz);
 
 	set_reg_field_value(
 		value,
-- 
2.7.4