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rockchip-linux
4G limit on an 8G board
There seems to be a memory limit of 4G even though my board is 8G. I've described it on nyanmisaka's ffmpeg-rockchip repo: https://github.com/nyanmisaka/ffmpeg-rockchip/issues/51
The 32bit iova space is hardware limit. But we still can use some tick in driver to workaround this problem. We are trying.
The 32bit iova space is hardware limit. But we still can use some tick in driver to workaround this problem. We are trying.
Thank you!
Lots of people have this issue. At one point I was considering of getting a secondary board with 16GB but then I found out more people had this problem.
The 32bit iova space is hardware limit. But we still can use some tick in driver to workaround this problem. We are trying.
any updates?
It is not fixed yet.
just pinging in the hopes of getting a message back from you saying that 4 devs are working on a fix. :)
from design perspective, why was this ever limited to 32 bit? Vendors marketed the board as a multi-realtime-stream encoder/decoder. It's very easy to hit that limit.
0001-DEBUG-video-rockchip-mpp-disable-CONFIG_DMABUF_CACHE.patch To disable DMABUF_CACHE so that iova will be instantly unmaped after every encoder/decoder task finished. Please apply this patch on kernel6.1 or kernel5.10 and recompile kernel boot and retry. @great9
0001-DEBUG-video-rockchip-mpp-disable-CONFIG_DMABUF_CACHE.patch To disable DMABUF_CACHE so that iova will be instantly unmaped after every encoder/decoder task finished. Please apply this patch on kernel6.1 or kernel5.10 and recompile kernel boot and retry. @great9
this patch doesn't apply with 5.10 rkr3.4 (aka the latest 5.10 from radxa)
0001-DEBUG-video-rockchip-mpp-disable-CONFIG_DMABUF_CACHE.patch To disable DMABUF_CACHE so that iova will be instantly unmaped after every encoder/decoder task finished. Please apply this patch on kernel6.1 or kernel5.10 and recompile kernel boot and retry. @great9
this patch doesn't apply with 5.10 rkr3.4 (aka the latest 5.10 from radxa)
It‘s okay to ignore the code conflict between different branch and commit. you may just mannually copy the code of the patch to following two files. drivers/dma-buf/Kconfig | 14 +++++++------- drivers/video/rockchip/mpp/mpp_iommu.c | 6 +++--- then rebuild and try
Hey, did anyone successfully try out the patch above? I spent some time figuring out how to compile the kernel but I had no success.
@HermanChen @chencl9410 please prioritize this issue. It is known for a long time and not fixed yet. Please apply the fix to the BSP kernel so that it lands in all distributions. This issue is critical and the reason why I can't use my Rockchip board. I would have recommended Rockchip board to friends, but I can't recommend it with this issue. Please fix it fast.
