diff options
| author | Louis Chauvet <louis.chauvet@bootlin.com> | 2025-10-16 19:56:09 +0200 |
|---|---|---|
| committer | Luca Ceresoli <luca.ceresoli@bootlin.com> | 2025-10-22 13:19:25 +0200 |
| commit | 95fa73787a7947a8fdfbb1ad310c3f11b26065d3 (patch) | |
| tree | 2accd13a2beeb2f8363444c1ea3172a088a03352 /Documentation/gpu | |
| parent | ee5c2c7d4bb6998ff11778436acbdc3154ce74ef (diff) | |
drm/vkms: Allow to attach planes and CRTCs via configfs
Create a default subgroup at /config/vkms/planes/plane/possible_crtcs
that will contain symbolic links to the possible CRTCs for the plane.
Tested-by: Mark Yacoub <markyacoub@google.com>
Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
Co-developed-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://lore.kernel.org/r/20251016175618.10051-8-jose.exposito89@gmail.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Diffstat (limited to 'Documentation/gpu')
| -rw-r--r-- | Documentation/gpu/vkms.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst index 9f76918bb1d1..c79fca3d3a11 100644 --- a/Documentation/gpu/vkms.rst +++ b/Documentation/gpu/vkms.rst @@ -98,6 +98,14 @@ CRTCs have 1 configurable attribute: - writeback: Enable or disable writeback connector support by writing 1 or 0 +To finish the configuration, link the different pipeline items:: + + sudo ln -s /config/vkms/my-vkms/crtcs/crtc0 /config/vkms/my-vkms/planes/plane0/possible_crtcs + +Since at least one primary plane is required, make sure to set the right type:: + + echo "1" | sudo tee /config/vkms/my-vkms/planes/plane0/type + Once you are done configuring the VKMS instance, enable it:: echo "1" | sudo tee /config/vkms/my-vkms/enabled @@ -108,6 +116,7 @@ Finally, you can remove the VKMS instance disabling it:: And removing the top level directory and its subdirectories:: + sudo rm /config/vkms/my-vkms/planes/*/possible_crtcs/* sudo rmdir /config/vkms/my-vkms/planes/* sudo rmdir /config/vkms/my-vkms/crtcs/* sudo rmdir /config/vkms/my-vkms |