VC4 HVS MODULE.(9)

🎀 VC4 HVS module 🎀

okay bestie, welcome to the Kernel API Manual page for VC4 HVS module.(9) — short, sweet, and lowkey essential. ✨

The Hardware Video Scaler (HVS) is literally the piece of hardware that does translation, scaling, colorspace conversion, and compositing of pixels stored in framebuffers into a FIFO of pixels going out to the Pixel Valve (CRTC). 💅 It operates at the system clock rate (the system audio clock gate, specifically), which is much higher than the pixel clock rate. highkey important, fr fr.

There is a single global HVS, with multiple output FIFOs that can be consumed by the PVs. 🫶 This file just manages the resources for the HVS, while the vc4_crtc.c code actually drives HVS setup for each CRTC. slay.

✨ SEE ALSO ✨

• Kernel file ./drivers/gpu/drm/vc4/vc4_hvs.c — the blueprint, the moment, the file 💖

xoxo, this one's from the source ./drivers/gpu/drm/vc4, dated October 2026, and it's the VC4 HVS module.(9) manual — mwah 💋