am335x using tilcdc ti-linux-4.1.y kernel problem

Johannes Pointner

Hello,

I tried to switch to the current ti kernel and as soon as the drm driver is loaded the kernel prints random chars to the serial console.

To figger out what is causing this behaviour I tried the ti-linux-4.4.y, linux mainline 4.1.13 and linux mainline 4.4-rc4 and those were working fine. Then I bisect the ti-linux-4.1.y kernel and I think I found the cause of my problem

-> The commit drm/tilcdc: rewrite pixel clock calculation

commit id: ed26841aa9112816e3e6c213625bff983524ff69

If I remove this patch everything is working.

Does anyone have experienced something similar?

Thx,

Hannes

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Hi,

Is this the Linux SDK or you download from some location?

0 Johannes Pointner over 10 years ago in reply to Biser Gatchev-XID

Prodigy 120 points

Hello,
I used for this the linux kernel from ti-processor-sdk-linux-am335x-evm-02.00.00.00 and I also tried the one from git.ti.com/.../ti-linux-4.1.y. But there is no difference between those two with reference to this problem.

For now I removed this patch and everything works fine for me. As soon as I have some spare time I'll investigate this issue further.

Regards,
Hannes

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am335x using tilcdc ti-linux-4.1.y kernel problem