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vc4: Use GPIO interrupts to detect HDMI HPD state transitions.

1

Right now the DRM core is helping us out by polling the HPD periodically, but we should be able to just register for an interrupt, saving CPU wakeups.

anholt

vc4: Investigate scanning tile lists to skip loads/stores of unmodified tiles.

2

Could we run a user shader in between binning completing and kicking off rendering, to scan for which tiles had no primitives binned to them and patch up the RCL...

anholt

vc4-drm : Are we losing hardware-accelerated blitting?

6

Hi, I have been adapting other people's pupular programs (RetroArch, Scummvm, and a long etc) to use the dispmanx API for years now. However, dispmanx should, sooner or later, be...

vanfanel

VC4 triggers debug_dma_assert_idle error.

3

We were booting fine on Fedora 25 with rc6, I enabled CPU idle which we'd had previously disabled as it had caused us issues way back in the 3.x days...

nullr0ute

We'll definitely want this for DSI. There are bits for X and Y flips per plane, and we need to reduce rotations to those.

anholt

vc4: Do a hilbert walk on the tiles.

3

Currently we call our tiles in raster order. If you do a hilbert fractal-like walk instead it can slightly increase cache locality for the texture sampler.

anholt