As discussed on IRC, memory-to-memory need to be modeled
properly in order to be supported by the media controller
framework, and thus to support the Request API.
First commit introduces a register/unregister API,
that creates/destroys all the entities and pads needed,
and links them.
The second commit uses this API to support the vim2m driver.
The series applies cleanly on v4.18-rc1.
Topology (media-ctl -p output)
==============================
media-ctl -p
Media controller API version 4.17.0
Media device information
------------------------
driver vim2m
model vim2m
serial
bus info
hw revision 0x0
driver version 4.17.0
Device topology
- entity 1: source (1 pad, 1 link)
type Node subtype V4L flags 0
pad0: Source
-> "proc":1 [ENABLED,IMMUTABLE]
- entity 3: proc (2 pads, 2 links)
type Node subtype Unknown flags 0
pad0: Sink
-> "sink":0 [ENABLED,IMMUTABLE]
pad1: Source
<- "source":0 [ENABLED,IMMUTABLE]
- entity 6: sink (1 pad, 1 link)
type Node subtype V4L flags 0
pad0: Sink
<- "proc":0 [ENABLED,IMMUTABLE]
Compliance output
=================
v4l2-compliance -m /dev/media0 -v
v4l2-compliance SHA: e2038ec6451293787b929338c2a671c732b8693d, 64 bits
Compliance test for device /dev/media0:
Media Driver Info:
Driver name : vim2m
Model : vim2m
Serial :
Bus info :
Media version : 4.17.0
Hardware revision: 0x00000000 (0)
Driver version : 4.17.0
Required ioctls:
test MEDIA_IOC_DEVICE_INFO: OK
Allow for multiple opens:
test second /dev/media0 open: OK
test MEDIA_IOC_DEVICE_INFO: OK
test for unlimited opens: OK
Media Controller ioctls:
Entity: 0x00000001 (Name: 'source', Function: 0x00010001)
Entity: 0x00000003 (Name: 'proc', Function: 0x00004005)
Entity: 0x00000006 (Name: 'sink', Function: 0x00010001)
Interface: 0x0300000c (Type: 0x00000200)
Pad: 0x01000002
Pad: 0x01000004
Pad: 0x01000005
Pad: 0x01000007
Link: 0x02000008
Link: 0x0200000a
Link: 0x0200000d
Link: 0x0200000e
test MEDIA_IOC_G_TOPOLOGY: OK
Entities: 3 Interfaces: 1 Pads: 4 Links: 4
Entity: 0x00000001 (Name: 'source', Type: 0x00010001)
Entity: 0x00000003 (Name: 'proc', Type: 0x0001ffff)
Entity: 0x00000006 (Name: 'sink', Type: 0x00010001)
Entity Links: 0x00000001 (Name: 'source')
Entity Links: 0x00000003 (Name: 'proc')
Entity Links: 0x00000006 (Name: 'sink')
test MEDIA_IOC_ENUM_ENTITIES/LINKS: OK
test MEDIA_IOC_SETUP_LINK: OK
--------------------------------------------------------------------------------
Compliance test for device /dev/video2:
Driver Info:
Driver name : vim2m
Card type : vim2m
Bus info : platform:vim2m
Driver version : 4.17.0
Capabilities : 0x84208000
Video Memory-to-Memory
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04208000
Video Memory-to-Memory
Streaming
Extended Pix Format
Media Driver Info:
Driver name : vim2m
Model : vim2m
Serial :
Bus info :
Media version : 4.17.0
Hardware revision: 0x00000000 (0)
Driver version : 4.17.0
Interface Info:
ID : 0x0300000c
Type : V4L Video
Major : 81
Minor : 7
Entity Info:
ID : 0x00000001 (1)
Name : source
Function : V4L2 I/O
Pad 0x01000002 : Source
Link 0x02000008: to remote pad 0x1000005 of entity 'proc': Data, Enabled, Immutable
Required ioctls:
test MC information (see 'Media Driver Info' above): OK
test VIDIOC_QUERYCAP: OK
Allow for multiple opens:
test second /dev/video2 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
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:
info: checking v4l2_queryctrl of control 'User Controls' (0x00980001)
info: checking v4l2_queryctrl of control 'Horizontal Flip' (0x00980914)
info: checking v4l2_queryctrl of control 'Vertical Flip' (0x00980915)
info: checking v4l2_queryctrl of control 'Transaction Time (msec)' (0x00981900)
info: checking v4l2_queryctrl of control 'Buffers Per Transaction' (0x00981901)
info: checking v4l2_queryctrl of control 'Horizontal Flip' (0x00980914)
info: checking v4l2_queryctrl of control 'Vertical Flip' (0x00980915)
info: checking v4l2_queryctrl of control 'Transaction Time (msec)' (0x08000000)
info: checking v4l2_queryctrl of control 'Buffers Per Transaction' (0x08000001)
test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
test VIDIOC_QUERYCTRL: OK
info: checking control 'User Controls' (0x00980001)
info: checking control 'Horizontal Flip' (0x00980914)
info: checking control 'Vertical Flip' (0x00980915)
info: checking control 'Transaction Time (msec)' (0x00981900)
info: checking control 'Buffers Per Transaction' (0x00981901)
test VIDIOC_G/S_CTRL: OK
info: checking extended control 'User Controls' (0x00980001)
info: checking extended control 'Horizontal Flip' (0x00980914)
info: checking extended control 'Vertical Flip' (0x00980915)
info: checking extended control 'Transaction Time (msec)' (0x00981900)
info: checking extended control 'Buffers Per Transaction' (0x00981901)
test VIDIOC_G/S/TRY_EXT_CTRLS: OK
info: checking control event 'User Controls' (0x00980001)
info: checking control event 'Horizontal Flip' (0x00980914)
info: checking control event 'Vertical Flip' (0x00980915)
info: checking control event 'Transaction Time (msec)' (0x00981900)
info: checking control event 'Buffers Per Transaction' (0x00981901)
test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
Standard Controls: 3 Private Controls: 2
Format ioctls:
info: found 1 formats for buftype 1
info: found 2 formats for buftype 2
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 (Not Supported)
test Composing: OK (Not Supported)
test Scaling: OK
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:
info: test buftype Video Capture
info: test buftype Video Output
test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
test VIDIOC_EXPBUF: OK
Total: 51, Succeeded: 51, Failed: 0, Warnings: 0
v3:
* Remove extra empty line.
* Remove duplicated entity name set.
* Reorder sink and source pads as suggested by Hans.
* Drop unused media macros, we can add them as needed.
v2:
* Fix compile error when MEDIA_CONTROLLER was not enabled.
* Fix the 'proc' entity link, which was wrongly connecting
source to source and sink to sink.
Ezequiel Garcia (1):
media: add helpers for memory-to-memory media controller
Hans Verkuil (1):
vim2m: add media device
drivers/media/platform/vim2m.c | 41 +++++-
drivers/media/v4l2-core/v4l2-dev.c | 13 +-
drivers/media/v4l2-core/v4l2-mem2mem.c | 172 +++++++++++++++++++++++++
include/media/v4l2-mem2mem.h | 19 +++
4 files changed, 236 insertions(+), 9 deletions(-)
--
2.18.0.rc2
