Daniel Golle 48592abf6f rockchip: translate DMA for the media IOMMU masters ...

The video codecs sit behind their own IOMMUs, but with the default
domain set to passthrough their buffers have to be physically
contiguous and come out of the 16 MiB CMA pool. A 4K frame needs
15.8 MiB of it, so hardware decoding of 4K video fails allocation and
falls back to software: 10 seconds of 4K HEVC then cost 22 seconds of
CPU, where the decoder does the same work with 0.15.

Have rockchip-iommu ask for a translated domain for the masters it
serves, so the display, codec, ISP and RGA blocks get scatter-gather
while everything behind another IOMMU, PCIe included, keeps the system
default and its throughput.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

2026-10-07 10:12:13 +01:00

..

armv8

rockchip: add display, GPU, codec and audio kernel modules

2026-10-07 10:12:12 +01:00

image

uboot-rockchip: switch to dedicated profile for NanoPi R76S

2026-09-06 21:12:57 +02:00

patches-6.18

rockchip: translate DMA for the media IOMMU masters

2026-10-07 10:12:13 +01:00

Makefile

treewide: drop the audio and display target features

2026-09-29 15:29:43 +01:00

modules.mk

rockchip: add camera capture kernel modules

2026-10-07 10:12:13 +01:00