Eric Lee / smarc-ti-linux-kernel

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Commit 20cb7198456d99daa65b4d08eff302968de912b4

Authored by Tomi Valkeinen
Committed by Greg Kroah-Hartman
1 parent 4e5a37c496

ARM: dts: am437x-sk-evm.dts: fix LCD timings 

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@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Showing 1 changed file with 6 additions and 6 deletions Side-by-side Diff

arch/arm/boot/dts/am437x-sk-evm.dts
Diff comments   View file @ 20cb719
... ... @@ -100,7 +100,7 @@
100 100 };
101 101  
102 102 lcd0: display {
103   - compatible = "osddisplays,osd057T0559-34ts", "panel-dpi";
  103 + compatible = "newhaven,nhd-4.3-480272ef-atxl", "panel-dpi";
104 104 label = "lcd";
105 105  
106 106 pinctrl-names = "default";
... ... @@ -112,11 +112,11 @@
112 112 clock-frequency = <9000000>;
113 113 hactive = <480>;
114 114 vactive = <272>;
115   - hfront-porch = <8>;
116   - hback-porch = <43>;
117   - hsync-len = <4>;
118   - vback-porch = <12>;
119   - vfront-porch = <4>;
  115 + hfront-porch = <2>;
  116 + hback-porch = <2>;
  117 + hsync-len = <41>;
  118 + vfront-porch = <2>;
  119 + vback-porch = <2>;
120 120 vsync-len = <10>;
121 121 hsync-active = <0>;
122 122 vsync-active = <0>;