[PATCH v3 0/4] media: meson: Add support for the Amlogic GE2D Accelerator Unit

[Neil Armstrong <narmstrong@baylibre.com>]

The GE2D is a 2D accelerator with various features like configurable blitter
with alpha blending, frame rotation, scaling, format conversion and colorspace
conversion.

The driver implements a Memory2Memory VB2 V4L2 streaming device permitting:
- 0, 90, 180, 270deg rotation
- horizontal/vertical flipping
- source cropping
- destination compositing
- 32bit/24bit/16bit format conversion

This adds the support for the GE2D version found in the AXG SoCs Family.

The missing features are:
- Source scaling
- Colorspace conversion
- Advanced alpha blending & blitting options

Dependencies:
- Patches 1-3: None
- Patch 4: https://lkml.kernel.org/r/20200915124553.8056-1-narmstrong@baylibre.com (applied for 5.11)

Changes since v2:
- removed error check in and after get_frame()
- moved the v4l2_file_operations lower in the code to avoid adding vidioc_setup_cap_fmt on top
- removed all memcpy of pix_fmt
- simplified & fixed ge2d_start_streaming
- added local buffer type check in vidioc_g_selection instead of using get_frame error
- removed impossible <0 rectangle check, fixed error string
- added comment on condition after V4L2_CID_ROTATE

Changes since v1:
- Rebased on v5.10-rc1

/ # v4l2-compliance -s
v4l2-compliance SHA: ea16a7ef13a902793a5c2626b0cefc4d956147f3, 64 bits, 64-bit time_t

Compliance test for meson-ge2d device /dev/video0:

Driver Info:
	Driver name      : meson-ge2d
	Card type        : meson-ge2d
	Bus info         : platform:meson-ge2d
	Driver version   : 5.9.0
	Capabilities     : 0x84208000
		Video Memory-to-Memory
		Streaming
		Extended Pix Format
		Device Capabilities
	Device Caps      : 0x04208000
		Video Memory-to-Memory
		Streaming
		Extended Pix Format

Required ioctls:
	test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
	test second /dev/video0 open: OK
	test VIDIOC_QUERYCAP: OK
	test VIDIOC_G/S_PRIORITY: OK
	test for unlimited opens: OK

	test invalid ioctls: OK
Debug ioctls:
	test VIDIOC_DBG_G/S_REGISTER: OK
	test VIDIOC_LOG_STATUS: OK (Not Supported)

Input ioctls:
	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
	test VIDIOC_ENUMAUDIO: OK (Not Supported)
	test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
	test VIDIOC_G/S_AUDIO: OK (Not Supported)
	Inputs: 0 Audio Inputs: 0 Tuners: 0

Output ioctls:
	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
	Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
	test VIDIOC_G/S_EDID: OK (Not Supported)

Control ioctls:
	test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
	test VIDIOC_QUERYCTRL: OK
	test VIDIOC_G/S_CTRL: OK
	test VIDIOC_G/S/TRY_EXT_CTRLS: OK
	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
	Standard Controls: 4 Private Controls: 0

Format ioctls:
	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
	test VIDIOC_G/S_PARM: OK (Not Supported)
	test VIDIOC_G_FBUF: OK (Not Supported)
	test VIDIOC_G_FMT: OK
	test VIDIOC_TRY_FMT: OK
	test VIDIOC_S_FMT: OK
	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
	test Cropping: OK
	test Composing: OK
	test Scaling: OK (Not Supported)

Codec ioctls:
	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
	test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

Buffer ioctls:
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
	test VIDIOC_EXPBUF: OK
	test Requests: OK (Not Supported)

Test input 0:

Streaming ioctls:
	test read/write: OK (Not Supported)
	test blocking wait: OK
	Video Capture: Captured 58 buffers                
	test MMAP (no poll): OK
	Video Capture: Captured 58 buffers                
	test MMAP (select): OK
	Video Capture: Captured 58 buffers                
	test MMAP (epoll): OK
	test USERPTR (no poll): OK (Not Supported)
	test USERPTR (select): OK (Not Supported)
	test DMABUF: Cannot test, specify --expbuf-device

Total for meson-ge2d device /dev/video0: 52, Succeeded: 52, Failed: 0, Warnings: 0

Neil Armstrong (4):
  dt-bindings: media: Add bindings for the Amlogic GE2D Accelerator Unit
  media: meson: Add M2M driver for the Amlogic GE2D Accelerator Unit
  MAINTAINERS: Add myself as maintainer of the Amlogic GE2D driver
  arm64: dts: meson-axg: add GE2D node

 .../bindings/media/amlogic,axg-ge2d.yaml      |   47 +
 MAINTAINERS                                   |    9 +
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi    |    9 +
 drivers/media/platform/Kconfig                |   13 +
 drivers/media/platform/Makefile               |    2 +
 drivers/media/platform/meson/ge2d/Makefile    |    3 +
 drivers/media/platform/meson/ge2d/ge2d-regs.h |  360 ++++++
 drivers/media/platform/meson/ge2d/ge2d.c      | 1091 +++++++++++++++++
 8 files changed, 1534 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/amlogic,axg-ge2d.yaml
 create mode 100644 drivers/media/platform/meson/ge2d/Makefile
 create mode 100644 drivers/media/platform/meson/ge2d/ge2d-regs.h
 create mode 100644 drivers/media/platform/meson/ge2d/ge2d.c

-- 
2.25.1