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From:   Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Date:   Fri, 04 Aug 2023 13:44:14 +0300
Subject: [PATCH 09/11] drm/bridge: tc358768: Fix tc358768_ns_to_cnt()
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Message-Id: <20230804-tc358768-v1-9-1afd44b7826b@ideasonboard.com>
References: <20230804-tc358768-v1-0-1afd44b7826b@ideasonboard.com>
In-Reply-To: <20230804-tc358768-v1-0-1afd44b7826b@ideasonboard.com>
To:     Andrzej Hajda <andrzej.hajda@intel.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        =?utf-8?q?P=C3=A9ter_Ujfalusi?= <peter.ujfalusi@gmail.com>,
        Francesco Dolcini <francesco@dolcini.it>
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Aradhya Bhatia <a-bhatia1@ti.com>,
        Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Precedence: bulk

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().

Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
 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)

-- 
2.34.1