Message-ID: <20251016175618.10051-1-jose.exposito89@gmail.com>
Date: Thu, 16 Oct 2025 19:56:02 +0200
From: José Expósito <jose.exposito89@...il.com>
To: louis.chauvet@...tlin.com
Cc: hamohammed.sa@...il.com,
	simona@...ll.ch,
	melissa.srw@...il.com,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	sebastian.wick@...hat.com,
	xaver.hugl@....org,
	victoria@...tem76.com,
	a.hindborg@...nel.org,
	leitao@...ian.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	José Expósito <jose.exposito89@...il.com>
Subject: [PATCH v7 00/16] drm/vkms: Add configfs support

Hi everyone,

This series allow to configure one or more VKMS instances without having
to reload the driver using configfs.

The process of configuring a VKMS device is documented in "vkms.rst".

In addition, I created a CLI tool to easily control VKMS instances from the
command line: vkmsctl [1].

The series is structured in 3 blocks:

  - Patches 1..11: Basic device configuration. For simplicity, I kept the
    available options as minimal as possible.

  - Patches 12 and 13: New option to skip the default device creation and to-do
    cleanup.

  - Patches 14, 15 and 16: Allow to hot-plug and unplug connectors. This is not
    part of the minimal set of options, but I included in this series so it can
    be used as a template/example of how new configurations can be added.

Finally, the code is thoroughly tested by a collection of IGT tests [2].

Best wishes,
José Expósito

[1] https://github.com/JoseExposito/vkmsctl
[2] https://lore.kernel.org/igt-dev/20250807074550.6543-1-jose.exposito89@gmail.com/

Changes in v7:

  - Rebased on top of drm-misc-next
  - Fixed 2 documentation issues (thanks Harry!)
  - Added reviewed-by Harry and Luca, thanks a lot!
  - Link to v6: https://lore.kernel.org/dri-devel/20250901122541.9983-1-jose.exposito89@gmail.com/

Changes in v6:

  - No code changes, rebased on top of drm-misc-next
  - Added Tested-by: Mark Yacoub, who merged the series into the Android tree (thanks!)
    https://lore.kernel.org/dri-devel/CAC0gqY6ZH8h5aoNh31ck3dP6c3YYtfTRjJ47Obu6xSXSVXm5mA@mail.gmail.com/
  - Added a link in the cover letter the CLI to configure VKMS: vkmsctl
  - CCed more people to try to get the series merged
  - Link to v5: https://lore.kernel.org/dri-devel/20250507135431.53907-1-jose.exposito89@gmail.com/

Changes in v5:

  - No code changes, rebased on top of drm-misc-next
  - Added Reviewed-by tags, thanks Louis!
  - Link to v4: https://lore.kernel.org/dri-devel/20250407081425.6420-1-jose.exposito89@gmail.com/

Changes in v4:

  - No code changes, rebased on top of drm-misc-next
  - Since Louis and I worked on this together, set him as the author of some of
    the patches and me as co-developed-by to reflect this joint effort.
  - Link to v3: https://lore.kernel.org/all/20250307163353.5896-1-jose.exposito89@gmail.com/

Changes in v3:

  - Applied review comments by Louis Chauvet: (thanks!!)
    - Use scoped_guard() instead of guard(mutex)(...)
    - Fix a use-after-free error in the connector hot-plug code
  - Rebased on top of drm-misc-next
  - Link to v2: https://lore.kernel.org/all/20250225175936.7223-1-jose.exposito89@gmail.com/

Changes in v2:

  - Applied review comments by Louis Chauvet:
    - Use guard(mutex)(...) instead of lock/unlock
    - Return -EBUSY when trying to modify a enabled device
    - Move the connector hot-plug related patches to the end
  - Rebased on top of drm-misc-next
  - Link to v1: https://lore.kernel.org/dri-devel/20250218170808.9507-1-jose.exposito89@gmail.com/T/

José Expósito (6):
  drm/vkms: Expose device creation and destruction
  drm/vkms: Allow to configure the default device creation
  drm/vkms: Remove completed task from the TODO list
  drm/vkms: Allow to configure connector status
  drm/vkms: Allow to update the connector status
  drm/vkms: Allow to configure connector status via configfs

Louis Chauvet (10):
  drm/vkms: Add and remove VKMS instances via configfs
  drm/vkms: Allow to configure multiple planes via configfs
  drm/vkms: Allow to configure the plane type via configfs
  drm/vkms: Allow to configure multiple CRTCs via configfs
  drm/vkms: Allow to configure CRTC writeback support via configfs
  drm/vkms: Allow to attach planes and CRTCs via configfs
  drm/vkms: Allow to configure multiple encoders via configfs
  drm/vkms: Allow to attach encoders and CRTCs via configfs
  drm/vkms: Allow to configure multiple connectors via configfs
  drm/vkms: Allow to attach connectors and encoders via configfs

 Documentation/gpu/vkms.rst                    | 100 ++-
 drivers/gpu/drm/vkms/Kconfig                  |   1 +
 drivers/gpu/drm/vkms/Makefile                 |   3 +-
 drivers/gpu/drm/vkms/tests/vkms_config_test.c |  24 +
 drivers/gpu/drm/vkms/vkms_config.c            |   8 +-
 drivers/gpu/drm/vkms/vkms_config.h            |  26 +
 drivers/gpu/drm/vkms/vkms_configfs.c          | 833 ++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_configfs.h          |   8 +
 drivers/gpu/drm/vkms/vkms_connector.c         |  35 +
 drivers/gpu/drm/vkms/vkms_connector.h         |   9 +
 drivers/gpu/drm/vkms/vkms_drv.c               |  18 +-
 drivers/gpu/drm/vkms/vkms_drv.h               |  20 +
 12 files changed, 1072 insertions(+), 13 deletions(-)
 create mode 100644 drivers/gpu/drm/vkms/vkms_configfs.c
 create mode 100644 drivers/gpu/drm/vkms/vkms_configfs.h


base-commit: b291e4f1a4951204ce858cd01801291d34962a33
-- 
2.51.0

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