On 2018-12-19 3:28 p.m., sunpeng...@amd.com wrote:
> From: Ken Chalmers <ken.chalm...@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.chalm...@amd.com>
> Reviewed-by: Leo Li <sunpeng...@amd.com>

Reviewed-by: Harry Wentland <harry.wentl...@amd.com>

Harry

> ---
>  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,
> 
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