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[agd5f]

DCC actually replaces the legacy framebuffer compression in the display controller. It serves both purposes on asics which support it....

[agd5f]

Also, HMM doesn't currently handle Peer to Peer access.

[agd5f]

FWIW, AMD did the GPU side of this (i.e., added peer to peer support to dma-buf in general)....

[agd5f]

GPUDirect/PeerDirect is not upstream....

[agd5f]

There is a flag in the vbios fan table (EnableZeroRPM) if the OEM enabled the feature....

[agd5f]

Freesync on DP has been supported in amdgpu for years.

[agd5f]

ON APUs the fan is controlled by the embedded controller on the platform, not the GPU driver since the fan covers both the CPU and the GPU....

[agd5f]

It's enabled by default if your board supports it.

[agd5f]

See this article:
https://www.phoronix.com/scan.php?pa...pec-Hurts-Open...

[agd5f]

In general, applications (well the user mode drivers) try to allocate memory where they want it to be and not move it. Moving stuff around just adds...

[agd5f]

There are lots of ways to copy data. The gfx engine has a DMA engine called CP DMA. You can also use the gfx engine itself or a compute kernel....

[agd5f]

Same place as always:
https://gitlab.freedesktop.org/drm/amd/-/issues...