Commit Graph

184 Commits

Author SHA1 Message Date
Chris Chamberlain d8ca494558 backend/drm: add wlr_drm_backend_monitor
This helper is responsible for listening for new DRM devices and
create new child DRM backends as necessary.
2021-12-13 14:55:16 +01:00
Simon Ser e656697a7d backend/drm: scan leases on uevent
Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3181
2021-11-19 16:06:07 +00:00
Simon Ser 86f5ecf468 backend/drm: introduce wlr_drm_lease
Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3183
2021-11-19 16:06:07 +00:00
Simon Ser e13f3f8608 backend/drm: handle per-connector hotplug events
When a connector ID is specified in a hotplug event, don't scan all
connectors. Only scan the connector that has changed.
2021-11-02 13:36:43 +01:00
Simon Ser 0817c52a21 backend/drm: get rid of BO handle table
The BO handle table exists to avoid double-closing a BO handle,
which aren't reference-counted by the kernel. But if we can
guarantee that there is only ever a single ref for each BO handle,
then we don't need the BO handle table anymore.

This is possible if we create the handle right before the ADDFB2
IOCTL, and close the handle right after. The handles are very
short-lived and we don't need to track their lifetime.

Because of multi-planar FBs, we need to be a bit careful: some
FB planes might share the same handle. But with a small check, it's
easy to avoid double-closing the same handle (which wouldn't be a
big deal anyways).

There's one gotcha though: drmModeSetCursor2 takes a BO handle as
input. Saving the handles until drmModeSetCursor2 time would require
us to track BO handle lifetimes, so we wouldn't be able to get rid
of the BO handle table. As a workaround, use drmModeGetFB to turn the
FB ID back to a BO handle, call drmModeSetCursor2 and then immediately
close the BO handle. The overhead should be minimal since these IOCTLs
are pretty cheap.

Closes: https://github.com/swaywm/wlroots/issues/3164
2021-10-29 11:38:37 +02:00
Simon Ser 2e12de96ca backend/drm: add support for panel orientation
Expose the panel orientation with wlr_drm_connector_get_panel_orientation.
Leave it to the compositor to consume this information and configure the
output accordingly.

Closes: https://github.com/swaywm/wlroots/issues/1581
2021-09-21 11:40:37 -06:00
Simon Zeni e5a949a955 backend/drm: implement drm lease function 2021-09-08 11:09:07 +02:00
Simon Ser 42dba9dc90 backend/drm: drop wlr_drm_connector.desired_mode
Previously used by attempt_enable_needs_modeset, but this has been
dropped in the previous commit.
2021-09-07 22:33:40 +02:00
Simon Ser 3c74bd0c91 backend/drm: introduce wlr_drm_connector_state
Previously, we were copying wlr_output_state on the stack and
patching it up to be guaranteed to have a proper drmModeModeInfo
stored in it (and not a custom mode). Also, we had a bunch of
helpers deriving DRM-specific information from the generic
wlr_output_state.

Copying the wlr_output_state worked fine so far, but with output
layers we'll be getting a wl_list in there. An empty wl_list stores
two pointers to itself, copying it on the stack blindly results in
infinite loops in wl_list_for_each.

To fix this, rework our DRM backend to stop copying wlr_output_state,
instead add a new struct wlr_drm_connector_state which holds both
the wlr_output_state and additional DRM-specific information.
2021-09-07 11:18:18 +02:00
Simon Ser 3fbf6e02a3 backend/drm: rename enum wlr_drm_connector_state to status
"state" is easily confused with wlr_output_state.
2021-09-07 11:18:18 +02:00
Simon Ser 5dfaf5ea9c backend/drm: introduce wlr_drm_bo_handle_table
Using GBM to import DRM dumb buffers tends to not work well. By
using GBM we're calling some driver-specific functions in Mesa.
These functions check whether Mesa can work with the buffer.
Sometimes Mesa has requirements which differ from DRM dumb buffers
and the GBM import will fail (e.g. on amdgpu).

Instead, drop GBM and use drmPrimeFDToHandle directly. But there's
a twist: BO handles are not ref'counted by the kernel and need to
be ref'counted in user-space [1]. libdrm usually performs this
bookkeeping and is used under-the-hood by Mesa.

We can't re-use libdrm for this task without using driver-specific
APIs. So let's just re-implement the ref'counting logic in wlroots.
The wlroots implementation is inspired from amdgpu's in libdrm [2].

Closes: https://github.com/swaywm/wlroots/issues/2916

[1]: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/110
[2]: 1a4c0ec9ae/amdgpu/handle_table.c
2021-08-25 10:05:37 -04:00
Simon Ser 46c42e55c6 backend/drm: add support for FB_DAMAGE_CLIPS
This allows the kernel to access our buffer damage. Some drivers
can take advantage of this, e.g. for PSR2 panels (Panel Self
Refresh) or for transfer over USB.

Closes: https://github.com/swaywm/wlroots/issues/1267
2021-08-18 20:59:25 +02:00
Simon Ser 7544b7abf9 backend/drm: use addon for wlr_drm_fb 2021-08-17 11:08:45 +02:00
Simon Ser c55f70c8b7 backend/drm: stop initializing renderer for parent backend
Unless we're dealing with a multi-GPU setup and the backend being
initialized is secondary, we don't need a renderer nor an allocator.
Stop initializing these.
2021-07-28 22:52:35 +02:00
Simon Ser 9b99570869 backend/drm: drop drm_surface_{make,unset}_current 2021-07-28 22:52:35 +02:00
Simon Ser f5900c1f00 backend/drm: remove primary swapchain
We can't nuke it completely, we still need it for multi-GPU.
2021-07-28 22:52:35 +02:00
Simon Ser cc8bc0db20 backend/drm: stop restoring CRTCs on exit
This is the cause of the spurious "drmHandleEvent failed" messages
at exit. restore_drm_outputs calls handle_drm_event in a loop without
checking whether the FD is readable, so drmHandleEvent ends up with a
short read (0 bytes) and returns an error.

The loop's goal is to wait for all queued page-flip events to complete,
to allow drmModeSetCrtc calls to succeed without EBUSY. The
drmModeSetCrtc calls are supposed to restore whatever KMS state we were
started with. But it's not clear from my PoV that restoring the KMS
state on exit is desirable.

KMS clients are supposed to save and restore the (full) KMS state on VT
switch, but not on exit. Leaving our KMS state on exit avoids unnecessary
modesets and allows flicker-free transitions between clients. See [1]
for more details, and note that with Pekka we've concluded that a new
flag to reset some KMS props to their default value on compositor
start-up is the best way forward. As a side note, Weston doesn't restore
the CRTC by does disable the cursor plane on exit (see
drm_output_deinit_planes, I still think disabling the cursor plane
shouldn't be necessary on exit).

Additionally, restore_drm_outputs only a subset of the KMS state.
Gamma and other atomic properties aren't accounted for. If the previous
KMS client had some outputs disabled, restore_drm_outputs would restore
a garbage mode.

[1]: https://blog.ffwll.ch/2016/01/vt-switching-with-atomic-modeset.html
2021-07-20 15:33:26 +02:00
Simon Ser f67cfb2ce2 backend/drm: remove backend arg from wlr_drm_interface.crtc_commit
The callee can just get it from the wlr_drm_connector.
2021-07-09 15:31:19 -04:00
Simon Ser 017555651b backend/drm: add test_only arg to wlr_drm_interface.crtc_commit
Right now callers of drm_crtc_commit need to check whether the
interface is legacy or atomic before passing the TEST_ONLY flag.
Additionally, the fallbacks for legacy are in-place in the common
code.

Add a test_only arg to the crtc_commit hook. This way, there's no
risk to pass atomic-only flags to the legacy function (add an assert
to ensure this) and all of the legacy-specific logic can be put back
into legacy.c (done in next commit).
2021-07-09 15:31:19 -04:00
Simon Ser b86a0c8d8f backend/drm: move cursor fields to wlr_drm_connector
Doesn't make a lot of sense to split the cursor fields between
wlr_drm_plane and wlr_drm_connector. Let's just move everything to
wlr_drm_connector.
2021-06-02 11:08:52 +02:00
Simon Ser 2b0a1aeed5 output: take a wlr_buffer in set_cursor
Instead of passing a wlr_texture to the backend, directly pass a
wlr_buffer. Use get_cursor_size and get_cursor_formats to create
a wlr_buffer that can be used as a cursor.

We don't want to pass a wlr_texture because we want to remove as
many rendering bits from the backend as possible.
2021-06-02 11:08:52 +02:00
Simon Ser e06ea4e84a backend/drm: remove format arg from drm_plane_init_surface
This was always set to ARGB8888.
2021-06-02 11:08:52 +02:00
Simon Ser 9e9be83a58 backend/drm: implement get_cursor_formats and get_cursor_size 2021-06-02 11:08:52 +02:00
Simon Ser a1e8a639b3 backend/drm: introduce drm_connector_commit_state
Backend-initiated mode changes can use this function instead of
going through drm_connector_set_mode. drm_connector_set_mode becomes
a mere drm_connector_commit_state helper.
2021-04-29 19:51:57 +02:00
Simon Ser 218955ce95 backend/drm: remove mode arg from drm_connector_set_mode
All of the information is in wlr_output_state.
2021-04-29 19:51:57 +02:00
Simon Ser 31082a0554 backend/drm: remove wlr_drm_crtc_state.mode
Replace it with drm_connector_state_mode, which computes the mode
from the wlr_output_state to be applied.
2021-04-29 19:51:57 +02:00
Simon Ser dfea0ff31d backend/drm: remove wlr_drm_crtc_state.active
Replace it with drm_connector_state_active, which figures out
whether the connector is active depending on the wlr_output_state
to be applied.
2021-04-29 19:51:57 +02:00
Simon Ser 485ecc11a6 backend/drm: remove wlr_drm_crtc.pending_modeset
Replace it with a new drm_connector_state_is_modeset function that
decides whether a modeset is necessary directly from the
wlr_output_state which is going to be applied.
2021-04-29 19:51:57 +02:00
Simon Ser 1a9701cd7c backend/drm: take wlr_output_state as arg in commit callers
Instead of relying on wlr_output.pending to be empty when performing
backend-initiated CRTC commits, use a zero wlr_output_state.
2021-04-29 19:51:57 +02:00
Simon Ser 8f90d7f8f5 backend/drm: take wlr_output_state as arg in crtc_commit
Stop assuming that the state to be applied is in output->pending in
crtc_commit. This will allow us to remove ephemeral fields in
wlr_drm_crtc, which are used scratch fields to stash temporary
per-commit data.
2021-04-29 19:51:57 +02:00
Simon Zeni c75aa71816 render/gbm_allocator: make wlr_gbm_allocator_create return a wlr_allocator 2021-04-28 20:55:57 +02:00
Simon Ser 9b0e0970f9 backend/drm: destroy backend on udev remove event
Any use of the DRM FD after the remove event results in a "Permission
denied" error.
2021-04-27 09:11:44 +02:00
Simon Ser c49ea9ef4f backend/drm: destroy when parent is destroyed 2021-04-27 09:11:44 +02:00
zccrs e76583f1ad Use absolute paths in include in header files
To unify the code style of the project, absolute paths have been used in
some places, such as '#include "render/allocator.h"' in
"render/gbm_allocator.h". Except for include the wayland protocol
headers should be consistent.
2021-04-06 10:40:56 +02:00
Simon Ser 73ffab70b0 backend/drm: don't blit in drm_fb_import
Instead blit in drm_plane_lock_surface. This makes drm_fb_import simpler
and better fits its name.
2021-01-24 18:33:56 +01:00
Simon Ser 4af85f4c19 backend/drm: simplify drm_fb_lock_surface
Make it take a plane instead, and rename to drm_plane_lock_surface.
2021-01-24 18:22:03 +01:00
Simon Ser 44a3d6e74d backend/drm: document wlr_drm_plane surface fields 2021-01-24 18:21:38 +01:00
Simon Ser cb6f584496 backend/drm: add support for the subconnector property
The subconnector property indicates the connector sub-type. This is
useful because that usually indicates what kind of connector the user
has plugged in to their monitor, e.g. a DisplayPort-to-DVI cable will
indicate a DVI subconnector. Also some laptops have non-DP connectors
that are internally linked to a DP port on the GPU.

Set the output description accordingly.

See https://drmdb.emersion.fr/properties/3233857728/subconnector
2021-01-17 12:42:25 +01:00
Simon Ser d9bbc416a6 backend/drm: re-use FBs
Instead of importing buffers to GBM and KMS at each frame, cache them
and re-use them while the wlr_buffer is alive.

This is the same as [1] and [2] but for the DRM backend.

[1]: https://github.com/swaywm/wlroots/pull/2538
[2]: https://github.com/swaywm/wlroots/pull/2539
2021-01-10 11:24:35 +01:00
Simon Ser 91cb0fc443 backend/drm: only keep track of local buffer
Stop keeping track of buffers on the parent GPU when multi-GPU is used.

This removes support for export_dmabuf on secondary GPUs, but renderer
v6 will bring this back by managing the swapchains in wlr_output instead
of the backends.
2021-01-10 11:24:35 +01:00
Simon Ser 5bd86b94f9 backend/drm: add wlr_drm_buf.local_wlr_buf 2021-01-10 11:24:35 +01:00
Simon Ser cd64610c66 backend/drm: introduce drm_fb_create 2021-01-10 11:24:35 +01:00
Simon Ser 5b1b43c68c backend/drm: make wlr_drm_plane.{pending,queued,current}_fb pointers
This will be useful once we start re-using wlr_drm_fb.
2021-01-10 11:24:35 +01:00
Simon Zeni 9192c0480a remove unnecessary egl includes 2021-01-07 17:11:22 +01:00
Simon Zeni b899a412e3 backend: remove wlr_egl from all backends 2021-01-07 17:11:22 +01:00
Simon Ser adfb7cd35a backend/drm: stash pending page-flip CRTC
wlr_drm_connector.crtc may be updated by the DRM backend while a
page-flip is pending. In this case, the page-flip handler won't be able
to find the right wlr_drm_connector from the CRTC ID.

Save the CRTC when performing a page-flip to ensure we always find the
right connector when we get the event.
2021-01-03 19:35:02 +01:00
Simon Ser 4b03bdc3ab Remove wlr_create_renderer_func_t
This callback allowed compositors to customize the EGL config used by
the renderer. However with renderer v6 EGL configs aren't used anymore.
Instead, buffers are allocated via GBM and GL FBOs are rendered to. So
customizing the EGL config is a no-op.
2020-12-30 17:09:40 +01:00
Simon Ser bec1e6b149 backend/drm: remove special linear case for cursor plane
We now properly mark the cursor plane's formats as linear-only, and we
now have a version of wlr_drm_format_intersect that handles the case of
linear-only formats and implicit modifiers.

We can remove the special drm_plane_init_surface flag we had for cursor
planes. This also allows us to use a non-linear layout for cursor planes
on drivers that support it.

Tested on amdgpu GFX9.
2020-12-30 11:17:43 +01:00
Simon Ser c5f239f411
backend/drm: make listener names more idiomatic
Use the "<object>_<event>" notation for listeners, use
"handle_<listener>" for handlers.
2020-12-25 14:45:00 +01:00
Simon Ser 54ec17ff64
backend/drm: use plural form for possible_crtcs
Make it clearer that this is a bitmask of CRTC indices.
2020-12-23 12:14:36 +01:00