ARM: dts: am437x-sk-evm.dts: fix LCD timings
PATCH 1/1 ARM: dts: am437x-sk-evm.dts: fix LCD timings
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.
--- arch/arm/boot/dts/am437x-sk-evm.dts | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
arch/arm/boot/dts/am437x-sk-evm.dts +6 -6
@@ -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>;
Signature · 1 line
2.2.0
PATCH 1/1 ARM: dts: am437x-sk-evm.dts: fix LCD timings
Quoted 13 lines · Tomi Valkeinen
The lcd0 node for
am437x-sk-evm.dtscontains 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.
Quoted 3 lines
Cc <[email protected]> # v3.17+Tested-by Felipe Balbi <[email protected]>Signed-off-by Tomi Valkeinen <[email protected]>
Applying into omap-for-v3.19/fixes thanks.
Tony
Quoted 37 lines
--- arch/arm/boot/dts/am437x-sk-evm.dts | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)arch/arm/boot/dts/am437x-sk-evm.dts +6
-6@@ -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>;Signature · 1 line
2.2.0