linux-kernel - [PATCH v5 0/5] drm/microchip: add GFX2D support for SAM9X60 and SAM9X75

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Message-ID: <20260113-cpitchen-mainline_gfx2d-v5-0-9cdab8fa699b@microchip.com>
Date: Tue, 13 Jan 2026 14:10:36 +0100
From: Cyrille Pitchen <cyrille.pitchen@...rochip.com>
To: David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	"Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>, Maxime Ripard
	<mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring
	<robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
	<conor+dt@...nel.org>, Nicolas Ferre <nicolas.ferre@...rochip.com>,
	"Alexandre Belloni" <alexandre.belloni@...tlin.com>, Claudiu Beznea
	<claudiu.beznea@...on.dev>, Russell King <linux@...linux.org.uk>
CC: <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	Cyrille Pitchen <cyrille.pitchen@...rochip.com>, Conor Dooley
	<conor.dooley@...rochip.com>
Subject: [PATCH v5 0/5] drm/microchip: add GFX2D support for SAM9X60 and
 SAM9X75

Hi all,

This series of patches adds GFX2D support.
The GFX2D is a 2D GPU embedded in some Microchip SoCs such as the
SAM9X60 and SAM9X75.

Patches have been developped on top the 'linux-6.12-mchp' branch of the
https://github.com/linux4microchip/linux.git repository and tested on
mainly on a sam9x75-curiosity board and also on a sam9x60-ek board.

Then patches have been rebased on top of the 'drm-misc-next' branch
of the https://gitlab.freedesktop.org/drm/misc/kernel.git repository
for mainlining.

About the tests, the GFX2D driver was used with the M2D (Multi 2D)
library: https://github.com/linux4sam/libm2d

This is an open source library that abstracts 2D GPUs like the Microchip
GFX2D (and later the Vivante GC520UL), providing graphics applications
of libraries with a unified API, inspired from OpenGL but focused on 2D
GPUs. The libm2d library itself relies on the libdrm library to send
commands to the relevant DRM driver in the Linux kernel.

M2D comes with a m2d_test program to run basic unitary tests.
In addition, libm2d has been integrated to two graphics frameworks:
- EGT: https://github.com/linux4sam/egt
- LVGL: https://github.com/lvgl/lvgl/pull/8729

BR,

Cyrille

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...rochip.com>
---
Changes in v5:
- Fixed compilation issues in patch 2:
  + Included <drm/drm_print.h> from mchp_gfx2d_cmd.c, mchp_gfx2d_drv.c
    and mchp_gfx2d_gem.c.
  + Replaced '.remove_new' with '.remove' in definition of 'struct
    platform_driver mchp_gfx2d_platform_driver' to match the latest
    definition of 'struct platform_driver'.
  + Removed the '.date' member from the definition of 'struct drm_driver
    mchp_gfx2d_drm_driver' since this 'date' member has been removed from
    'struct drm_driver'.
- Fixed typos in doxygen documentations of two functions:
  + mchp_gfx2d_process_completed_commands()
  + mchp_gfx2d_init_command_queue()
- Link to v4: https://lore.kernel.org/r/20260112-cpitchen-mainline_gfx2d-v4-0-f210041ad343@microchip.com

Changes in v4:
- Rebased onto the 'drm-misc-next' branch on 2026-01-12.
- Link to v3: https://lore.kernel.org/r/20251124-cpitchen-mainline_gfx2d-v3-0-607f8c407286@microchip.com

Changes in v3:
- Collected Acked-by tag from Conor Dooley on patch 1
- Rebased onto the 'drm-misc-next' branch on 2025-11-24.
- Link to v2: https://lore.kernel.org/r/20250918-cpitchen-mainline_gfx2d-v2-0-6cfac9d56612@microchip.com

Changes in v2:
- Renamed microchip,gfx2d.yaml into microchip,sam9x60-gfx2d.yaml.
- Removed the 'clock-names' property from the DT bindings.
- Renamed the GPU node from 'gfx2d' to 'gpu' in sam9x{60,7}.dtsi files.
- Link to v1: https://lore.kernel.org/r/20250911-cpitchen-mainline_gfx2d-v1-0-d7fab1a381ee@microchip.com

---
Cyrille Pitchen (5):
      dt-bindings: gpu: add bindings for the Microchip GFX2D GPU
      drm/microchip: add a driver for the Microchip GFX2D GPU
      ARM: dts: microchip: sam9x60: Add GFX2D GPU
      ARM: dts: microchip: sam9x7: Add GFX2D GPU
      ARM: configs: at91_dt_defconfig: enable GFX2D driver

 .../bindings/gpu/microchip,sam9x60-gfx2d.yaml      |   46 +
 MAINTAINERS                                        |   10 +
 arch/arm/boot/dts/microchip/sam9x60.dtsi           |    8 +
 arch/arm/boot/dts/microchip/sam9x7.dtsi            |    8 +
 arch/arm/configs/at91_dt_defconfig                 |    1 +
 drivers/gpu/drm/Kconfig                            |    1 +
 drivers/gpu/drm/Makefile                           |    1 +
 drivers/gpu/drm/microchip/Kconfig                  |   21 +
 drivers/gpu/drm/microchip/Makefile                 |    8 +
 drivers/gpu/drm/microchip/mchp_gfx2d_cmd.c         | 1809 ++++++++++++++++++++
 drivers/gpu/drm/microchip/mchp_gfx2d_cmd.h         |  169 ++
 drivers/gpu/drm/microchip/mchp_gfx2d_drv.c         |  350 ++++
 drivers/gpu/drm/microchip/mchp_gfx2d_drv.h         |  132 ++
 drivers/gpu/drm/microchip/mchp_gfx2d_gem.c         |  264 +++
 drivers/gpu/drm/microchip/mchp_gfx2d_gem.h         |   90 +
 drivers/gpu/drm/microchip/mchp_gfx2d_ioctl.c       |  274 +++
 drivers/gpu/drm/microchip/mchp_gfx2d_ioctl.h       |   17 +
 include/uapi/drm/microchip_drm.h                   |  286 ++++
 18 files changed, 3495 insertions(+)
---
base-commit: 4a768c544f64eaa2fc7cfa91e46f43aa4aad0c40
change-id: 20250911-cpitchen-mainline_gfx2d-6631e9352af7

Best regards,
-- 
Cyrille Pitchen <cyrille.pitchen@...rochip.com>