linux-kernel - [PATCH v2 0/2] media: platform: Add Aspeed Video Engine Driver

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Message-Id: <1536866964-71593-1-git-send-email-eajames@linux.vnet.ibm.com>
Date:   Thu, 13 Sep 2018 14:29:22 -0500
From:   Eddie James <eajames@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mark.rutland@....com, devicetree@...r.kernel.org,
        linux-aspeed@...ts.ozlabs.org, openbmc@...ts.ozlabs.org,
        robh+dt@...nel.org, mchehab@...nel.org,
        linux-media@...r.kernel.org, andrew@...id.au, joel@....id.au,
        Eddie James <eajames@...ux.vnet.ibm.com>
Subject: [PATCH v2 0/2] media: platform: Add Aspeed Video Engine Driver

The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs
can capture and compress video data from digital or analog sources. With
the Aspeed chip acting as a service processor, the Video Engine can
capture the host processor graphics output.

This series adds a V4L2 driver for the VE, providing a read() interface
only. The driver triggers the hardware to capture the host graphics output
and compress it to JPEG format.


v4l2-compliance output:

v4l2-compliance SHA   : not available

Driver Info:
	Driver name   : aspeed-video
	Card type     : Aspeed Video Engine
	Bus info      : platform:aspeed-video
	Driver version: 4.18.7
	Capabilities  : 0x81200001
		Video Capture
		Read/Write
		Extended Pix Format
		Device Capabilities
	Device Caps   : 0x01200001
		Video Capture
		Read/Write
		Extended Pix Format

Compliance test for device /dev/video0 (not using libv4l2):

Required ioctls:
	test VIDIOC_QUERYCAP: OK

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

Debug ioctls:
	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
	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
	test VIDIOC_G/S_AUDIO: OK (Not Supported)
	Inputs: 1 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)

Test input 0:

	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: 3 Private Controls: 0

	Format ioctls:
		test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
		test VIDIOC_G/S_PARM: OK
		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 (Not Supported)
		test Composing: OK (Not Supported)
		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 (Not Supported)
		test VIDIOC_EXPBUF: OK (Not Supported)

Test input 0:

Streaming ioctls:
	test read/write: OK
	test MMAP: OK (Not Supported)
	test USERPTR: OK (Not Supported)
	test DMABUF: OK (Not Supported)


Total: 47, Succeeded: 47, Failed: 0, Warnings: 0


Changes since v1:
 - Removed le32_to_cpu calls for JPEG header data
 - Reworked v4l2 ioctls to be compliant.
 - Added JPEG controls
 - Updated devicetree docs according to Rob's suggestions.
 - Added myself to MAINTAINERS

Eddie James (2):
  dt-bindings: media: Add Aspeed Video Engine binding documentation
  media: platform: Add Aspeed Video Engine driver

 .../devicetree/bindings/media/aspeed-video.txt     |   26 +
 MAINTAINERS                                        |    8 +
 drivers/media/platform/Kconfig                     |    8 +
 drivers/media/platform/Makefile                    |    1 +
 drivers/media/platform/aspeed-video.c              | 1469 ++++++++++++++++++++
 5 files changed, 1512 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/aspeed-video.txt
 create mode 100644 drivers/media/platform/aspeed-video.c

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1.8.3.1