Re: [PATCH 09/11] drm/bridge: tc358768: Fix tc358768_ns_to_cnt()

[Péter Ujfalusi]

On 04/08/2023 13:44, Tomi Valkeinen wrote:
> The tc358768_ns_to_cnt() is, most likely, supposed to do a div-round-up
> operation, but it misses subtracting one from the dividend.
> 
> Fix this by just using DIV_ROUND_UP().

Reviewed-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx>

> Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver")
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/bridge/tc358768.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
> index 9411b0fb471e..dc2241c18dde 100644
> --- a/drivers/gpu/drm/bridge/tc358768.c
> +++ b/drivers/gpu/drm/bridge/tc358768.c
> @@ -630,7 +630,7 @@ static int tc358768_setup_pll(struct tc358768_priv *priv,
>  
>  static u32 tc358768_ns_to_cnt(u32 ns, u32 period_ps)
>  {
> -	return (ns * 1000 + period_ps) / period_ps;
> +	return DIV_ROUND_UP(ns * 1000, period_ps);
>  }
>  
>  static u32 tc358768_ps_to_ns(u32 ps)
> 

-- 
Péter