[PATCH RFC v2 00/16] 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).

This series depends on 
https://lore.kernel.org/all/20241122-google-remove-crtc-index-from-parameter-v2-0-81540742535a@bootlin.com
but as this is a bit complex to rebase, you can find a working branch 
here:
https://gitlab.freedesktop.org/louischauvet/kernel/-/tree/b4/vkms-configfs

Signed-off-by: Louis Chauvet <louis.chauvet at bootlin.com>
---
Changes in v2:
- Added many new configuration (mainly connector)
- Link to v1: https://lore.kernel.org/r/20240814-google-config-fs-v1-0-8363181907a6@bootlin.com

---
Louis Chauvet (16):
      drm/vkms: Add vkms_delete/create_device helper
      drm/vkms: Cleanup configuration field on device destroy
      drm/vkms: Introduce ConfigFS interface
      drm/vkms: Introduce configfs for plane
      drm/vkms: Introduce configfs for plane rotation
      drm/vkms: Introduce configfs for plane color encoding
      drm/vkms: Introduce configfs for plane color range
      drm/vkms: Introduce configfs for crtc and encoder
      drm/vkms: Introduce configfs for connectors
      drm/vkms: Introduce configfs for connector type
      drm/vkms: Introduce configfs for plane format
      drm/vkms: Introduce configfs for device name
      drm/vkms: Introduce configfs for connector status
      drm/vkms: Introduce configfs for connector id
      drm/vkms: Introduce configfs for connector EDID
      drm/vkms: Introduce configfs for encoder type

 drivers/gpu/drm/vkms/Kconfig         |    1 +
 drivers/gpu/drm/vkms/Makefile        |    1 +
 drivers/gpu/drm/vkms/vkms_config.c   |   36 +
 drivers/gpu/drm/vkms/vkms_config.h   |    6 +-
 drivers/gpu/drm/vkms/vkms_configfs.c | 1404 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_configfs.h |  128 ++++
 drivers/gpu/drm/vkms/vkms_drv.c      |   21 +-
 drivers/gpu/drm/vkms/vkms_drv.h      |    3 +
 8 files changed, 1594 insertions(+), 6 deletions(-)
---
base-commit: 98efdd02e220fea84c1491012d7292749a71faeb
change-id: 20240521-google-config-fs-b935b66b8d7b
prerequisite-message-id: 20241122-google-vkms-managed-v5-0-1ab60403e960 at bootlin.com
prerequisite-patch-id: b608594ad493a41000ee703792eac4b23f9e35dc
prerequisite-patch-id: 5697aa87c44bbf3eda8a1ba424465dc792545d4c
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prerequisite-patch-id: 30a1e033fa43241ca6a43006fd4f29f8e9217224
prerequisite-message-id: 20241122-b4-vkms-allocated-v2-0-ff7bddbf0bfb at bootlin.com
prerequisite-patch-id: 9741873a5f0a7a3cf117dec7837354c3ad38ac3a
prerequisite-patch-id: 1a383d1494e4f2142b62822f2ba482a3b813563a
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prerequisite-patch-id: 57f5aeff2a9e8f2b6f47569e44dcd8fa587ed4bf
prerequisite-message-id: 20241122-b4-new-color-formats-v3-0-23f7776197c9 at bootlin.com
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prerequisite-patch-id: 62c8d109a22b9978f755255b67f13fe74fb7008d
prerequisite-message-id: 20241122-writeback_line_by_line-v3-0-085d5810f6e3 at bootlin.com
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prerequisite-patch-id: 20d8823f9c1d372ab2b88f969f5110f77e49c7f9
prerequisite-message-id: 20241122-google-remove-crtc-index-from-parameter-v2-0-81540742535a at bootlin.com
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Best regards,
-- 
Louis Chauvet <louis.chauvet at bootlin.com>