linux-kernel - [PATCH 3.18 117/150] ARM: dts: am437x-sk-evm.dts: fix LCD timings

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Message-Id: <20150114072101.153857088@linuxfoundation.org>
Date:	Tue, 13 Jan 2015 23:23:08 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Felipe Balbi <balbi@...com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Tony Lindgren <tony@...mide.com>
Subject: [PATCH 3.18 117/150] ARM: dts: am437x-sk-evm.dts: fix LCD timings

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tomi Valkeinen <tomi.valkeinen@...com>

commit d73f825e6efa723e81d9ffcc4949fe9f03f1df29 upstream.

The lcd0 node for am437x-sk-evm.dts contains bad LCD timings, and while
they seem to work with a quick test, doing for example blank/unblank
will give you a black display.

This patch updates the timings to the 'typical' values from the LCD spec
sheet.

Also, the compatible string is completely bogus, as
"osddisplays,osd057T0559-34ts" is _not_ a 480x272 panel. The panel on
the board is a newhaven one. Update the compatible string to reflect
this. Note that this hasn't caused any issues, as the "panel-dpi"
matches the driver.

Tested-by: Felipe Balbi <balbi@...com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/boot/dts/am437x-sk-evm.dts |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/arch/arm/boot/dts/am437x-sk-evm.dts
+++ b/arch/arm/boot/dts/am437x-sk-evm.dts
@@ -100,7 +100,7 @@
 	};
 
 	lcd0: display {
-		compatible = "osddisplays,osd057T0559-34ts", "panel-dpi";
+		compatible = "newhaven,nhd-4.3-480272ef-atxl", "panel-dpi";
 		label = "lcd";
 
 		pinctrl-names = "default";
@@ -112,11 +112,11 @@
 			clock-frequency = <9000000>;
 			hactive = <480>;
 			vactive = <272>;
-			hfront-porch = <8>;
-			hback-porch = <43>;
-			hsync-len = <4>;
-			vback-porch = <12>;
-			vfront-porch = <4>;
+			hfront-porch = <2>;
+			hback-porch = <2>;
+			hsync-len = <41>;
+			vfront-porch = <2>;
+			vback-porch = <2>;
 			vsync-len = <10>;
 			hsync-active = <0>;
 			vsync-active = <0>;


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