Hi, I am omap-3530, u-boot 1.3 version , while switching from u-boot level to kernel level , i am getting flicker on LCD(display)., How to remove that flicker. I want flicker free booting from (CLEAN boot-up) from u-boot level to Kernel. If anybody knows it , please help me.
Thank you, mdks123
md ks said the following on 02/19/2009 03:30 PM:
Hi, I am omap-3530, u-boot 1.3 version , while switching from u-boot level to kernel level , i am getting flicker on LCD(display)., How to remove that flicker.
What platform is this? did you mention u-boot 1.3? the current u-boots are numbered 2009-01 etc.. Where is the source code from? Further, could you see if u-boot from the mainline [1] resolves the issue?
Regards, Nishanth Menon
Hi, Thanks for your Reply. I am using u-boot-1.3.3 and linux kernel 2.6.29-rc2. we are able to display customised logo in U-boot level , kenel level and file system level. But while switching from u-boot to Kernel , Screen(Display) is showing Blank screen (4 to 5 seconds). Is it possible to avoid this blank screen. I want to implement clean bootup process(No flicker/ Blank-ness from one level to other)
You said, Shared FB, i don't have any idea about shared FB, Please provide some help in this area and at least refference
even though at U-boot level we alloctes some FB , in Kernel intialisation stage that FB is erased and allocates its own FB, I am thinking like that , is it true.
Is it possible to use same FB both in u-boot level and Kernel level.
Please help me. ....mdks
2009/2/19 Nishanth Menon menon.nishanth@gmail.com
md ks said the following on 02/19/2009 03:30 PM:
Hi, I am omap-3530, u-boot 1.3 version , while switching from u-boot level to kernel level , i am getting flicker on LCD(display)., How to remove that flicker.
What platform is this? did you mention u-boot 1.3? the current u-boots are numbered 2009-01 etc.. Where is the source code from? Further, could you see if u-boot from the mainline [1] resolves the issue?
Regards, Nishanth Menon
Dear md ks,
In message 53202c40902190530h15e01425l5f40d9aed7754cda@mail.gmail.com you wrote:
I am omap-3530, u-boot 1.3 version , while switching from u-boot
I guess you are already aware of this, but anyway: U-Boot 1.3 is awfully old and unsupported. Please make sure to update to recent code.
level to kernel level , i am getting flicker on LCD(display)., How to remove that flicker. I want flicker free booting from (CLEAN boot-up) from u-boot level to Kernel. If anybody knows it , please help me.
The feature you are looking for is "shared frame buffer". It has been implemented for a number of systems, but probably not yet for the OMAP.
Note that for correct operation support for a shared frame buffer must be present both in U-Boot *and* in Linux.
Best regards,
Wolfgang Denk
participants (3)
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md ks -
Nishanth Menon -
Wolfgang Denk