Re: [U-Boot] [PATCH 2/2] imx: mx6ul_14x14_evk: convert to DM_VIDEO

On Fri, Aug 2, 2019 at 12:05 PM Peng Fan peng.fan@nxp.com wrote:

HI,

...

Subject: Re: [PATCH 2/2] imx: mx6ul_14x14_evk: convert to DM_VIDEO

Hi Peng,

On Thu, Aug 1, 2019 at 3:02 AM Peng Fan peng.fan@nxp.com wrote:

...

•   display0: display@0 {
  

•           bits-per-pixel = <16>;
  

•           bus-width = <24>;
  

•           display-timings {
  

•                   native-mode = <&timing0>;
  

•                   timing0: timing0 {
  

•                           clock-frequency = <9200000>;
  

•                           hactive = <480>;
  

•                           vactive = <272>;
  

•                           hfront-porch = <8>;
  

•                           hback-porch = <4>;
  

•                           hsync-len = <41>;
  

•                           vback-porch = <2>;
  

•                           vfront-porch = <4>;
  

•                           vsync-len = <10>;
  

•                           hsync-active = <0>;
  

•                           vsync-active = <0>;
  

•                           de-active = <1>;
  

•                           pixelclk-active = <0>;
  

So here we have the LCD timings in the device tree, which differs from the the devicetree in mainline.

This is based on the old mxsfb fbdev driver, which has been removed in 5.3-rc.

In mainline we pass the innolux,at043tn24 LCD compatible.

Shouldn't U-Boot be able to handle the same dt-bindings as in the kernel?

I added this node in x-u-boot.dtsi, not in common dts. If drop this display-timings, we need add a similar structure inside code just as kernel did. And need to restructure mxsfb driver.

For simple, we could leave this in u-boot.dtsi.

How about adding panel timings in panel-simple we have similar in u-boot and sync equivalent dts changes from Linux?