AMD RDNA 2 Display Core 3.0 (Navi 21 / Radeon RX 6000)
Handles the on-chip display hardware (scanout, planes, pipes, and output encoders) for AMD's RDNA 2 generation GPUs built on the Navi 21 / Sienna Cichlid silicon, which ship in the Radeon RX 6800, RX 6900, and related RX 6000-series desktop graphics cards launched in late 2020 and still on sale through 2025.
recommendation
It should stay in the kernel because it powers the display engine on AMD's RDNA 2 GPUs, including the Radeon RX 6800, 6900, and other RX 6000-series cards that AMD was still selling new in 2025. The code continues to receive upstream maintenance, and there is no sign of any deprecation discussion on the mailing lists.
repository signals
sources
- git.kernel.org
The dcn30 directory still receives upstream changes in current kernels; local git log also showed touches in 2025-2026 rather than abandonment.
- git.kernel.org
AMDGPU display resource selection maps DCN_VERSION_3_0 to Sienna Cichlid-class hardware, identifying dcn30 as an active ASIC-generation support block inside amdgpu rather than a dead standalone driver.
- amd.com
AMD still marketed the Radeon RX 6000 series with retailer links on a page crawled in April 2026, supporting that this RDNA 2 generation was still sold new in 2025.
- amd.com
AMD's RX 6800 product page remains live and lists the card as a current component product with Linux support, indicating ongoing retail/new-system relevance for DCN 3.0 era boards.
- en.wikipedia.org
RDNA 2 is the GPU generation behind Radeon RX 6000 products, matching the dcn30-era hardware generation and indicating a substantial deployed base.
codex reasoning notes (technical)
Not an early-exit case: this is ASIC-specific display engine code under amdgpu DC. Upstream activity was checked via local code search and local git log (`rg`, `git -c safe.directory=... log`); the kernel.org tree/log URLs are canonical-recall URLs corresponding to those local findings. Web `search_query` on lore for dcn30 removal/deprecation returned no usable removal-discussion hits, so there is no evidence here of active upstream removal. Web `search_query` produced the AMD RX 6000 series / RX 6800 pages and RDNA 2 Wikipedia page for deployment evidence. Because dcn30 backs still-deployed RDNA 2 hardware and recent maintenance continues, the correct posture is keep, not deprecate/remove.