linux-kernel - [PATCH v4 1/2] drm: rcar-du: use 1000 to avoid misunderstanding in rcar_du_dpll

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Date:   Mon, 18 Dec 2017 00:35:18 +0000
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Laurent <laurent.pinchart@...asonboard.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        David Airlie <airlied@...ux.ie>
Cc:     Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux-Kernel <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH v4 1/2] drm: rcar-du: use 1000 to avoid misunderstanding in rcar_du_dpll_divider()

From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

It is difficult to understand its scale if number has many 0s.
This patch uses "* 1000" to avoid it in rcar_du_dpll_divider().

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
v3 -> v4

 - no change

 drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 5685d5a..6820461f 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -132,7 +132,7 @@ static void rcar_du_dpll_divider(struct rcar_du_crtc *rcrtc,
 
 				output = input * (n + 1) / (m + 1)
 				       / (fdpll + 1);
-				if (output >= 400000000)
+				if (output >= 400 * 1000 * 1000)
 					continue;
 
 				diff = abs((long)output - (long)target);
-- 
1.9.1