2198928_en-US

[#1]

IMX8MP implements continuous lvds display for uboot and kernel to shorten boot time.

Hello, community workers:

Currently the SDK with imx-5.10.72 version, after displaying uboot, there will be empty window period to display the logo of kernel, refer to the knowledge base of the patch that is continuously displayed, but the configuration can't realize the effect, and it will affect the display under the system, resulting in jittering all the time; please have a good suggestion and operation, I look forward to your reply, thank you!

Re: IMX8MP 实现uboot和kernel的连续lvds显示，缩短开机时间Hi,
Thanks for the reply, I'll follow up with a revalidation of the 5.15 patch; thanks for providing the idea and documentation of the problem-solving operation!Re: IMX8MP 实现uboot和kernel的连续lvds显示，缩短开机时间

Hi, the AN link provided by

describes it as being in versions 6.6.36_2.1.0 and 6.6.52_2.2.0, it's not clear if 5.10.72 applies and if the motherboard is reliable for long term use

-->The ones in the patch are generic methods, not version-specific. So it is possible to migrate to 5.10.72. In terms of reliability, don't worry, these ANs were written by many other customers who had a need for a fast boot. There is a trade-off to be considered, as this program boots without uboot. console, so you need to replace it with the imx-boot firmware with uboot console for later debugging.

Patch 2 of the 5.15 patch is fixing the splash screen, how about you check it line by line again?

Best Regards,
Zhiming

Re: IMX8MP 实现uboot和kernel的连续lvds显示，缩短开机时间Zhiming, Hi
Tried both 5.10 and 5.15 as per the 5.15 patch: the part where the patch is added manually finds its counterpart, but it doesn't display well;
AN link provided, introduction is at 6.6.36_2.1.0 and version 6.6.52_2.2.0, it's not clear if 5.10.72 applies and if the motherboard is reliable for long term use; thank you for your further questions!Re: IMX8MP 实现uboot和kernel的连续lvds显示，缩短开机时间

Hi,

The patch is based on the L5.15 kernel, and I personally feel that there are differences in the kernel modifications that need to be taken care of, so I was wondering if you guys have been able to get every line of the patch in? I wonder if you have been able to type in every line of the patch? If there is something that can't be typed in, how do you deal with it?

Also you guys can consider optimizing the boot time, refer to this AN below, remove the uboot part, after optimization, the uboot spl will only take about 400ms, the kernel 300+ms, this time is perfectly fine to show only the kernel logo after powering up. this way you don't have to consider the display interface between the uboot and the kernel.

https://docs.nxp.com/bundle/AN14093/page/topics/results.html

Best Regards,
Zhiming

Re: IMX8MP 实现uboot和kernel的连续lvds显示，缩短开机时间Hi，Zhiming，参考文章链接标题为：i.MX 8MP LVDS seamless display (连续显示) between U-boot and Kernel；其中按照补丁操作，并不能实现Re: IMX8MP 实现uboot和kernel的连续lvds显示，缩短开机时间

Hi @dadaxin

Referring to the knowledge base of continuously displayed patches, the

-->Which article?


Best Regards,
Zhiming