U-Boot Logo showing incorrect colors with eLCDIF

[Anatolij Gustschin]

Hi Fabio,

On Fri, 24 Jan 2020 16:26:26 -0300
Fabio Estevam festevam at gmail.com wrote:

> > Do you have 'bits-per-pixel' property in your display node in DT?
> > Is suitable CONFIG_VIDEO_BPPxx option enabled in your board_defconfig ?  
> 
> Yes, I have it, but it has the wrong value. It should be 24bpp instead of 16bpp.
> 
> I did the following change:
> 
> --- a/arch/arm/dts/imx6ul-14x14-evk-u-boot.dtsi
> +++ b/arch/arm/dts/imx6ul-14x14-evk-u-boot.dtsi
> @@ -4,7 +4,6 @@
>   */
> 
>         display0: display at 0 {
> -               bits-per-pixel = <16>;
> +               bits-per-pixel = <24>;
>                 bus-width = <24>;
> 
>                 display-timings {
> 
> And now I see the U-Boot strings showing with a correct white color.
> 
> However, the logo does not print and I have the following error:
> 
> Error: 32 bit/pixel mode, but BMP has 8 bit/pixel
> 
> How can I fix this mismatch?

Now I see that bitmap rendering code for video-uclass driver
doesn't support displaying 8bpp bitmaps on 24bpp frame buffer.

Before DM_VIDEO conversion cfb_console driver was used and
it supports such rendering. I'm working on a fix for this.
Thanks for testing!

--
Anatolij