Commit Graph

4 Commits

Author SHA1 Message Date
Jonas Ådahl
8989c42d40 backend/native: Add udev rule to ignore vkms devices
Virtual Kernel Mode Setting (vkms) is a virtual /dev/dri/card* device
not backed by any actual hardware. It's intended for testing purposes,
e.g. to run tests suites with a reproducable setup, or in continuous
integration pipelines.

Currently mutter don't have any tests that can run on top of vkms, but
will eventually get that. To prepare for the ability to do that, and
having said kernel module loaded without causing wierd issues with any
active session, add an udev rule that tells mutter to ignore any vkms
device.

Otherwise, when vkms is loaded, mutter would detect it, assume it's a
regular monitor, configure it as such, thus add a region of the stage
that ends up nowhere, which isn't very helpful. It might also conflict
with running actual tests that need to interact with vkms if the active
session has taken control of it.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1740>
2021-04-30 15:10:28 +02:00
Jonas Ådahl
ad1bffc002 backend/native: Disable KMS modifiers for amdgpu and nouveau as well
Lets wait until we have better ways to unredirect client buffers before
we start enabling KMS modifiers for amdgpu and nouveau; we end up with
mismatch between client buffer modifiers and primary plane modifier,
which right now needs to be the same for unredirection.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1792>
2021-04-14 07:14:24 +00:00
Jonas Ådahl
da3baba980 backend/native: Only disable KMS modifiers for i915
The intel DRM driver is known for not being able to handle multi head
setups when KMS modifiers are enabled, due to the implicitly selected
modifiers, while being more suitable for single head setups, cause
bandwidth issues when a certain number of monitor times resolution and
refresh rate is configured.

We don't yet support automatically finding a combination of modifiers
that work, and have because of this disabled KMS modifiers unless the
driver actually needs it.

Lets flip this configuration the other way around, changing the current
udev rule to decide wen to *disable* KMS modifier support, as it so that
only the Intel driver has this problem, while on the other hand, there
several drivers that requires modifiers to function at all.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1792>
2021-04-14 07:14:24 +00:00
Karol Herbst
9b9b912765 backends: force enable modifiers on tagged devices
Some devices can't scanout to linear buffers directly as the hw is not
capable of eg rendering into a linear depth buffer.

Add code to force kms-modifiers on udev taged devices.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1408

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1443
2020-09-28 14:00:44 +02:00