Framebuffer support

jonver — Mon, 19 Sep 2016 08:06:36 GMT

Hi,

Is there any decent manual available on how to add framebuffer support on the imx6(ul)?

I suppose I need to make changes in the following:

1) Kernel modules

2) Device tree

3) U-Boot bootargs

I've build my kernel with the following modules

FB_TFT=y
CONFIG_FB_TFT_ILI9325=m

I added the following to the device tree

/ {
itdb28 {
compatible = "ilitek,ili9325";
status = "okay";

rotate = <0>;
bgr;
buswidth = <8>;
reset-gpios = <&gpio3 23 0>;
dc-gpios = <&gpio3 5 0>;
cs-gpios = <&gpio3 1 0>;
wr-gpios = <&gpio3 0 0>;
db-gpios = <&gpio3 7 0>,
<&gpio3 8 0>,
<&gpio3 9 0>,
<&gpio3 10 0>,
<&gpio3 11 0>,
<&gpio3 15 0>,
<&gpio3 16 0>,
<&gpio3 17 0>;
/* LED pin drives backlight directly. Use transistor (50mA) */
/* led-gpios = <&gpio 4 1>; */
debug = <7>;
};

framebuffer {
compatible = "simple-framebuffer";
reg = <0x1d385000 (240 * 320 * 2)>;
width = <240>;
height = <320>;
stride = <(240 * 2)>;
format = "r5g6b5";
};
};

Which provides me the following error:

Error opening /dev/fb0: No such file or directory

Thanks!

Re: Framebuffer support

jimmychan — Thu, 22 Sep 2016 08:35:17 GMT

which BSP are you using?

topic Re: Framebuffer support in i.MX Processors

Framebuffer support

Re: Framebuffer support