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From: Sachin Kamat <sachin.kamat@linaro.org>
To: linux-samsung-soc@vger.kernel.org
Cc: kgene.kim@samsung.com, tushar.behera@linaro.org,
	sachin.kamat@linaro.org, patches@linaro.org
Subject: [PATCH 1/2] ARM: dts: Update display clock frequency for Origen-4210
Date: Thu, 26 Sep 2013 10:20:17 +0530	[thread overview]
Message-ID: <1380171018-24229-1-git-send-email-sachin.kamat@linaro.org> (raw)

From: Tushar Behera <tushar.behera@linaro.org>

As per the timing information for supported panel, the value should
be between 47.2 MHz to 47.9 MHz for 60Hz refresh rate.

Total horizontal pixels = 1024 (x-res) + 80 (margin) + 48 (hsync) = 1152
Total vertical pixels = 600 (y-res) + 80 (margin) + 3 (vsync) = 653

Target pixel clock rate for refresh rate @60 Hz
	= 1152 * 653 * 60 = 47208960 Hz ~ 47.5 MHz

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
---
 arch/arm/boot/dts/exynos4210-origen.dts |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/exynos4210-origen.dts b/arch/arm/boot/dts/exynos4210-origen.dts
index 382d8c7..6906e8a 100644
--- a/arch/arm/boot/dts/exynos4210-origen.dts
+++ b/arch/arm/boot/dts/exynos4210-origen.dts
@@ -301,7 +301,7 @@
 	display-timings {
 		native-mode = <&timing0>;
 		timing0: timing {
-			clock-frequency = <50000>;
+			clock-frequency = <47500000>;
 			hactive = <1024>;
 			vactive = <600>;
 			hfront-porch = <64>;
-- 
1.7.9.5

             reply	other threads:[~2013-09-26  4:50 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-26  4:50 Sachin Kamat [this message]
2013-09-26  4:50 ` [PATCH 2/2] ARM: dts: Update display clock frequency for Origen-4412 Sachin Kamat
2013-11-12 10:17   ` Kukjin Kim
2013-11-13  3:47     ` Tushar Behera
2013-12-02  4:14       ` Sachin Kamat
2013-10-11  3:59 ` [PATCH 1/2] ARM: dts: Update display clock frequency for Origen-4210 Sachin Kamat
2013-10-21  3:04 ` Sachin Kamat
2013-10-31  8:45 ` Sachin Kamat

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