This is a note to let you know that I've just added the patch titled
ARM: dts: am437x-sk-evm.dts: fix LCD timings
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-am437x-sk-evm.dts-fix-lcd-timings.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d73f825e6efa723e81d9ffcc4949fe9f03f1df29 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Date: Fri, 5 Dec 2014 09:39:31 +0200
Subject: ARM: dts: am437x-sk-evm.dts: fix LCD timings
From: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
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@xxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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>;
Patches currently in stable-queue which might be from tomi.valkeinen@xxxxxx are
queue-3.18/arm-dts-am437x-sk-evm.dts-fix-lcd-timings.patch
queue-3.18/arm-dts-am437x-sk-fix-lcd-enable-pin-mux-data.patch
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