Black Screen Between Splash Screen and Application Load

Tim Roberts80

Hello,

I've been working on getting my boot time optimized on a Sitara AM335x EVM SK. As things stand right now, From the green light turning on indicating power on to a usable program on the display is about 8 seconds which I'm pretty pleased with.

What I'm wanting is to make this look a little bit cleaner. In between my splash screen and the program loading I have a 2-3 second gap where my screen goes blank after the splash screen has shown but before my application arrives on the screen.

My application was written in Qt. I'm using SDK 6, kernel version 3.2.0. Does anyone have any ideas about what causes this blank screen and how to get rid of it (without sacrificing boot time)?

Thanks.

over 9 years ago

0 Ivan Matrakov over 9 years ago

TI__Expert 4475 points

Hi Tim,

Please give much more information. Where you activated the splash screen. Please see the:
e2e.ti.com/.../849350
If this is your case. If yes, after starting kernel, you have to do two things
- to remove code in a kernel where resetting a display setting - usually this is a gpio's located in omap-hwmod.c file
- in a lcd driver to remove reset code and remove first setting of frame buffers.

BR
Ivan

0 Tim Roberts80 over 9 years ago in reply to Ivan Matrakov

Intellectual 470 points

Hi Ivan,

Thanks for the info. I'm past the uboot splash screen. Psplash has started and put up a splash screen. I'm just confused as to why the psplash splash screen disappears and my screen goes black before loading my application. I'll look in the omap-hwmod.c file and see what I can find.

0 Ivan Matrakov over 9 years ago in reply to Tim Roberts80

TI__Expert 4475 points

Hi,

After omap-hwmod.c you have to modify and driver located in .../driver/video/xxx.c. There are reset, initialize frame buffer, interrupts, ....

Good luck

Ivan

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Black Screen Between Splash Screen and Application Load