gpu: ipu-di: Switch to DIV_ROUND_CLOSEST for DI clock divider calc

We can use the DIV_ROUND_CLOSEST() macro when calculating the DI
clock divider, rounded to nearest int.

Suggested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 3 insertions, 6 deletions

diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
index d95fbd0f6952..b61d6be97602 100644
--- a/drivers/gpu/ipu-v3/ipu-di.c
+++ b/drivers/gpu/ipu-v3/ipu-di.c
@@ -440,8 +440,7 @@ static void ipu_di_config_clock(struct ipu_di *di,
                         clk_set_rate(clk, sig->mode.pixelclock);
 
                         in_rate = clk_get_rate(clk);
-                        div = (in_rate + sig->mode.pixelclock / 2) /
-                                sig->mode.pixelclock;
+                        div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
                         if (div == 0)
                                 div = 1;
 
@@ -459,8 +458,7 @@ static void ipu_di_config_clock(struct ipu_di *di,
                 unsigned div, error;
 
                 clkrate = clk_get_rate(di->clk_ipu);
-                div = (clkrate + sig->mode.pixelclock / 2) /
-                        sig->mode.pixelclock;
+                div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
                 rate = clkrate / div;
 
                 error = rate / (sig->mode.pixelclock / 1000);
@@ -482,8 +480,7 @@ static void ipu_di_config_clock(struct ipu_di *di,
                         clk_set_rate(clk, sig->mode.pixelclock);
 
                         in_rate = clk_get_rate(clk);
-                        div = (in_rate + sig->mode.pixelclock / 2) /
-                                sig->mode.pixelclock;
+                        div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
                         if (div == 0)
                                 div = 1;