Bug 8576 - Building embedded Linux for Atmel SAMA5D4_Xplained with HDMI work not propber. HDMI does not work
Summary: Building embedded Linux for Atmel SAMA5D4_Xplained with HDMI work not propber...
Status: RESOLVED WONTFIX
Alias: None
Product: buildroot
Classification: Unclassified
Component: Other (show other bugs)
Version: 2015.11
Hardware: PC Linux
: P5 major
Target Milestone: ---
Assignee: unassigned
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-12-31 21:30 UTC by JensAmberg
Modified: 2016-02-16 17:54 UTC (History)
1 user (show)

See Also:
Host:
Target:
Build:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description JensAmberg 2015-12-31 21:30:51 UTC 
Building embedded Linux for Atmel SAMA5D4_Xplained with HDMI work not proper. HDMI does not work.

When I build with buildroot the images for the Atme SASMA5D4_Xaplined Board. inkl HDMI and fb0 HDMI will not work.

A already change the device tree to the correct dts file. However the fb0 is present in the rootfs under /dev.

I make a double check. I use the linux4sam demo Image 4.7 and flash it tto my EvalBoard. HDMI Works perfect. After this i build with buildroot. Board is booting everthing works but not HDMI.

And no the strange thing. I have replaced file for file from the demo  linux4sam demo Image 4.7. Firts when i take from  linux4sam demo Image 4.7 the at91bootstrap.bin the HDMI works.
Comment 1 JensAmberg 2016-01-25 19:10:31 UTC 
Ok i habe investigated the problem. It depends on wrong clock. With the new bootloader the CPU clock is set to 600 MHZ. But the kernel does not handle this correct.
Comment 2 Thomas Petazzoni 2016-02-14 21:08:11 UTC 
While a real problem, this bug is not a Buildroot problem, but rather a kernel problem that should be discussed with the Atmel kernel maintainers.
Comment 3 JensAmberg 2016-02-16 17:54:35 UTC 
How can i contact Atmel Kernel developer? I post an bug on www.linux4sam.com Forum. But nothing happens