Atmel/Microchip HLCDC display controller for AT91 and SAMA5 SoCs
The integrated LCD display controller built into Microchip's (formerly Atmel's) AT91, SAM9, and SAMA5 family of ARM microprocessors, used to drive panels on embedded and industrial devices such as HMIs, point-of-sale terminals, and single-board computers from the 2010s onward.
recommendation
It should stay because Microchip still sells these SoCs new in 2025, including the SAM9X60, SAM9X7, and the SAMA5D2/D3/D4 lines, with active graphics development boards in their current catalog. Microchip engineers were still posting upstream cleanup and feature work (such as nomodeset support) for this driver in late 2025, so it has a clear maintainer and an ongoing user base in embedded deployments.
repository signals
sources
- lore.kernel.org
Upstream work continued in late 2025 with a Microchip-authored cleanup/maintenance series for drm/atmel-hlcdc, indicating active ownership rather than removal.
- lore.kernel.org
The driver received functional work in late 2025, including nomodeset support, which is inconsistent with a deprecation/removal path.
- microchip.com
Microchip was still marketing SAM9 devices in 2025/2026, including SAM9X60/SAM9X7 parts with LCD/graphics capability relevant to this driver family.
- microchip.com
Microchip still listed current embedded-graphics development support around SAMA5D4, SAMA5D3, and SAMA5D2 platforms, showing ongoing display-oriented deployments in this SoC line.
codex reasoning notes (technical)
Real driver directory: Kconfig and source define an HLCDC DRM/KMS driver for AT91/SAMA5-family SoCs, and the code also carries SAM9X60 support in-tree (checked locally via shell on Kconfig and atmel_hlcdc_dc.c). Upstream evidence came from lore_file_timeline on drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c, which showed fresh 2025-12 and 2026-04 touches and no removal-shaped activity in the recent timeline; cited lore URLs were returned by that MCP call. Market/deployment evidence came from web search_query results on official Microchip pages showing SAM9 graphics-capable parts and active graphics/dev-board collateral in 2025/2026. Because the hardware line is still sold for embedded/industrial use, the driver has recent vendor maintenance, and there is no natural replacement for the same integrated controller IP, the recommendation is keep rather than deprecate.