[PATCH RFC 0/7] drm/vkms: ConfigFS interface

[Louis Chauvet]

VKMS is manly used to test userspace program and its behavior. The current 
implementation is not very configurable as you can only have one device, 
with few specific planes.

This series aims to introduce a new interface, using ConfigFS, to create 
and configure more devices. This will introduce:
- Device creation
- Plane creation
- Plane configuration (type, color encoding, color range, rotations)
- Encoder creation
- CRTC creation
- Linking between CRTC and planes/encoders

The proposition is:
/config/vkms
	DEVICE_1
	┣━ enable
	┣━ writeback
	┣━ planes
	┃  ┣━ PLANE_1
	┃  ┃  ┣━ type
	┃  ┃  ┣━ supported_rotations
	┃  ┃  ┣━ color_range
	┃  ┃  ┣━ color_encoding
	┃  ┃  ┣━ default_color_encoding
	┃  ┃  ┣━ default_rotations
	┃  ┃  ┣━ default_color_range
	┃  ┃  ┗━ possible_crtcs
	┃  ┃     ┗━ >> /config/vkms/DEVICE_1/crtc/CRTC_1 
	┃  ┣━ PLANE_2
	┃  ┃  ┗━ ditto
	┃  ┗━ PLANE_3
	┃     ┗━ ditto
	┃
	┣━ encoders
	┃  ┣━ ENCODER_1
	┃  ┃  ┗━ possible_crtcs
	┃  ┃     ┗━ >> /config/vkms/DEVICE_1/crtc/CRTC_1
	┃  ┗━ ENCODER_2
	┃     ┗━ ditto
	┃
	┗━ crtc
	   ┗━ CRTC_1
	
This interface aims to be extendable (new property can easly be added in 
objects) and easy to use (objects are created simply by creating folders, 
and configured by writing files).

Signed-off-by: Louis Chauvet <louis.chauvet at bootlin.com>
---
Louis Chauvet (7):
      drm/vkms: Add vkms_delete/create_device helper
      drm/vkms: Introduce ConfigFS interface
      drm/vkms: Introduce basic plane creation
      drm/vkms: Introduce plane rotation in ConfigFS
      drm/vkms: Add color encoding to ConfigFS
      drm/vkms: Add color range in ConfigFS
      drm/vkms: Add crtc and encoder configuration in ConfigFS

 drivers/gpu/drm/vkms/Kconfig         |   1 +
 drivers/gpu/drm/vkms/Makefile        |   1 +
 drivers/gpu/drm/vkms/vkms_configfs.c | 953 +++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_configfs.h | 105 ++++
 drivers/gpu/drm/vkms/vkms_drv.c      |  19 +-
 drivers/gpu/drm/vkms/vkms_drv.h      |   3 +
 6 files changed, 1078 insertions(+), 4 deletions(-)
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Best regards,
-- 
Louis Chauvet <louis.chauvet at bootlin.com>