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[v2,7/7] gpu: ipu-di: Switch to DIV_ROUND_CLOSEST for DI clock divider calc

Message ID 1418954426-21909-8-git-send-email-steve_longerbeam@mentor.com (mailing list archive)
State New, archived
Headers show

Commit Message

Steve Longerbeam Dec. 19, 2014, 2 a.m. UTC 
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>
---
 drivers/gpu/ipu-v3/ipu-di.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
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Patch

diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
index d95fbd0..b61d6be 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;