Intel® Celeron® Processor G1840 芯片的DMA控制器在 CentOS 7 64位系统下，使用 linux 4.9.37内核自带测试程序 dmatest 测试失败，测试命令：modprobe dmatest channel=dma0chan0 timeout=2000 iterations=1 run=1，测试结果报错：dmaengine: __dma_request_channel: fail ((null))，烦请提供芯片相应的 DMA控制器 寄存器 规格书，感谢！

[Alberto_R_Intel]

kwang113, Thank you for posting in the Intel® Communities Support.

Just to let you know, we only provide support in English language and currently, we are using a translation tool.

In order to provide the most accurate information in reference to your question, we will do further research on this matter, as soon as I get any updates I will post all the details on this thread.

Regards,

Alberto R.

Intel Customer Support Technician

A Contingent Worker at Intel

[Alberto_R_Intel]

kwang113, I just received an update on this matter.

In order to gather the information that you are looking for please visit the Linux community support for further details on this matter:

https://01.org/linuxgraphics

Additionally, if you are creating or developing a software/hardware you can also visit the following places:

Intel® Developer Zone - Software

https://software.intel.com/registration/?lang=en-us

Intel® Resource & Design Center - Hardware

https://www.intel.com/content/www/us/en/design/resource-design-center.html?erpm_id=6176886

Regards,

Alberto R.

Intel Customer Support Technician

A Contingent Worker at Intel