Add the New display timing in the SC668s SOM bootloader

IoT Modules Smart Module
1

Hi,

We have connected the EK79007 display to the Quectel SC668S and performed the following steps to configure it:

Added the display timings and necessary commands in the device tree.

Flashed the updated image. However, the issue is that the Quectel SC668S SOM displays the “Quectel logo image,” but when the Android screen loads, the screen timings are incorrect, and the display does not render properly.

If the display goes to sleep and then wakes up, the Android home screen appears correctly, and the display functions as expected.

We suspect that the timing configurations need to be added to the bootloader. However, after analyzing the code, we could not find any panel-related configurations. We were informed that the Quectel team might have access to update the timing. Could you confirm whether the timing update needs to be done by your team, or if we can modify the code ourselves?

2

Hi，
I see that there is a ticket for the same requirement in EService system.
We can provide support in EService.

Thanks.

3

Thanks Zheng.
"Is it possible for the kernel to load the panel timings and send commands to power on the display without modifying the bootloader? Once the display goes to sleep and wake up, the kernel loads the timings and initializes the panel, and it was working perfectly . Is there a solution to resolve this issue on the kernel side?

4

Hi
Also need to bring up LCD in bootloader stage to show boot logo.

Thanks.

5

Thanks Great.Zheng

Issue was resolved by adding the changes done in the bootloader stage.