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

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

[Cyrille Pitchen]

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@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

 .../devicetree/bindings/gpu/microchip,gfx2d.yaml   |   53 +
 MAINTAINERS                                        |   10 +
 arch/arm/boot/dts/microchip/sam9x60.dtsi           |    9 +
 arch/arm/boot/dts/microchip/sam9x7.dtsi            |    9 +
 arch/arm/configs/at91_dt_defconfig                 |    1 +
 drivers/gpu/drm/Kconfig                            |    2 +
 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         | 1808 ++++++++++++++++++++
 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         |  263 +++
 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, 3503 insertions(+)
---
base-commit: d2624d90a0b776db468e889cb079ff1d3edaccf3
change-id: 20250911-cpitchen-mainline_gfx2d-6631e9352af7

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

[PATCH 1/5] dt-bindings: gpu: add bindings for the Microchip GFX2D GPU

[Cyrille Pitchen]

The Microchip GFX2D GPU is embedded in the SAM9X60 and SAM9X7 SoC family.
Describe how the GFX2D GPU is integrated in these SoCs, including
register space, interrupt and clock.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
---
 .../devicetree/bindings/gpu/microchip,gfx2d.yaml   | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml b/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..e416e13bc6627a0fef3c70625a6a3e2d91636ffc
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpu/microchip,gfx2d.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip GFX2D GPU
+
+maintainers:
+  - Cyrille Pitchen <cyrille.pitchen@microchip.com>
+
+properties:
+  compatible:
+    enum:
+      - microchip,sam9x60-gfx2d
+      - microchip,sam9x7-gfx2d
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      const: periph_clk
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/at91.h>
+    gfx2d@f0018000 {
+      compatible = "microchip,sam9x60-gfx2d";
+      reg = <0xf0018000 0x4000>;
+      interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
+      clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
+      clock-names = "periph_clk";
+    };
+
+...

-- 
2.48.1

Re: [PATCH 1/5] dt-bindings: gpu: add bindings for the Microchip GFX2D GPU

[Conor Dooley]

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On Thu, Sep 11, 2025 at 05:26:25PM +0200, Cyrille Pitchen wrote:
> The Microchip GFX2D GPU is embedded in the SAM9X60 and SAM9X7 SoC family.
> Describe how the GFX2D GPU is integrated in these SoCs, including
> register space, interrupt and clock.
> 
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
> ---
>  .../devicetree/bindings/gpu/microchip,gfx2d.yaml   | 53 ++++++++++++++++++++++
>  1 file changed, 53 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml b/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..e416e13bc6627a0fef3c70625a6a3e2d91636ffc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml

Filename matching a compatible please.

> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpu/microchip,gfx2d.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip GFX2D GPU
> +
> +maintainers:
> +  - Cyrille Pitchen <cyrille.pitchen@microchip.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - microchip,sam9x60-gfx2d
> +      - microchip,sam9x7-gfx2d
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      const: periph_clk
> +    maxItems: 1

Why do you need clock-names if you only have one clock?
If there's a reason to keep it, drop the _clk - it's redundant.

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/clock/at91.h>
> +    gfx2d@f0018000 {

"gfx2d" is not a generic node name, I assume this should actually be
"gpu"?

Cheers,
Conor.

> +      compatible = "microchip,sam9x60-gfx2d";
> +      reg = <0xf0018000 0x4000>;
> +      interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
> +      clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
> +      clock-names = "periph_clk";
> +    };
> +
> +...
> 
> -- 
> 2.48.1
> 
> 

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[PATCH 3/5] ARM: dts: microchip: sam9x60: Add GFX2D GPU

[Cyrille Pitchen]

Add support for the GFX2D GPU.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
---
 arch/arm/boot/dts/microchip/sam9x60.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/sam9x60.dtsi b/arch/arm/boot/dts/microchip/sam9x60.dtsi
index b075865e6a7688005d471665459b3f6f1f26f7a4..6a177c008e1501e49d984a216e8d060f9dbc63cb 100644
--- a/arch/arm/boot/dts/microchip/sam9x60.dtsi
+++ b/arch/arm/boot/dts/microchip/sam9x60.dtsi
@@ -353,6 +353,15 @@ AT91_XDMAC_DT_PERID(26))>,
 				status = "disabled";
 			};
 
+			gpu: gfx2d@f0018000 {
+				compatible = "microchip,sam9x60-gfx2d";
+				reg = <0xf0018000 0x4000>;
+				interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
+				clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
+				clock-names = "periph_clk";
+				status = "disabled";
+			};
+
 			i2s: i2s@f001c000 {
 				compatible = "microchip,sam9x60-i2smcc";
 				reg = <0xf001c000 0x100>;

-- 
2.48.1

[PATCH 4/5] ARM: dts: microchip: sam9x7: Add GFX2D GPU

[Cyrille Pitchen]

Add support for the GFX2D GPU.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
---
 arch/arm/boot/dts/microchip/sam9x7.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/sam9x7.dtsi b/arch/arm/boot/dts/microchip/sam9x7.dtsi
index 66c07e642c3e1a2272490ec311062dfdf291c1cc..f4b71a49e6c167a0c9ad89b0c58fadb1ed467a5d 100644
--- a/arch/arm/boot/dts/microchip/sam9x7.dtsi
+++ b/arch/arm/boot/dts/microchip/sam9x7.dtsi
@@ -271,6 +271,15 @@ AT91_XDMAC_DT_PERID(38))>,
 			status = "disabled";
 		};
 
+		gpu: gfx2d@f0018000 {
+			compatible = "microchip,sam9x7-gfx2d";
+			reg = <0xf0018000 0x4000>;
+			interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
+			clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
+			clock-names = "periph_clk";
+			status = "disabled";
+		};
+
 		i2s: i2s@f001c000 {
 			compatible = "microchip,sam9x7-i2smcc", "microchip,sam9x60-i2smcc";
 			reg = <0xf001c000 0x100>;

-- 
2.48.1

[PATCH 5/5] ARM: configs: at91_dt_defconfig: enable GFX2D driver

[Cyrille Pitchen]

The GFX2D GPU is embedded in both SAM9X60 and SAM9X75; enable the
driver to use it.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
---
 arch/arm/configs/at91_dt_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/at91_dt_defconfig b/arch/arm/configs/at91_dt_defconfig
index ff13e1ecf4bb9545d6d2210b2f3059e6807779a0..85e9b52152aec6746f660dd0c299cd5aa12ce2ea 100644
--- a/arch/arm/configs/at91_dt_defconfig
+++ b/arch/arm/configs/at91_dt_defconfig
@@ -144,6 +144,7 @@ CONFIG_VIDEO_OV2640=m
 CONFIG_VIDEO_OV7740=m
 CONFIG_DRM=y
 CONFIG_DRM_ATMEL_HLCDC=y
+CONFIG_DRM_MICROCHIP_GFX2D=y
 CONFIG_DRM_MICROCHIP_LVDS_SERIALIZER=y
 CONFIG_DRM_PANEL_SIMPLE=y
 CONFIG_DRM_PANEL_EDP=y

-- 
2.48.1