Commit Graph

598 Commits

Author SHA1 Message Date
Simon Ser 5ea02f900c backend/drm: force linear layout for multi-GPU buffers
Some buffers need to be copied across GPUs. Such buffers need to be
allocated with a format and modifier suitable for both the source
and the destination.

When explicit modifiers aren't supported, we were forcing the buffers
to be allocated with a linear layout, because implicit modifiers
aren't portable across GPUs. All is well with this case.

When explicit modifiers are supported, we were advertising the whole
list of destination modifiers, in the hope that the source might
have some in common and might be able to allocate a buffer with a
more optimized layout. This works well if the source supports explicit
modifiers. However, if the source doesn't, then wlr_drm_format_intersect
will fallback to implicit modifiers, and everything goes boom: the
source uses a GPU-specific tiling and the destination interprets it
as linear.

To avoid this, just force linear unconditionally. We'll be able to
revert this once we have a good way to indicate that an implicit modifier
isn't supported in wlr_drm_format_set, see [1].

[1]: https://github.com/swaywm/wlroots/pull/2815

Closes: https://github.com/swaywm/wlroots/issues/3030
(cherry picked from commit d71ed635b9)
2021-07-08 17:16:42 +02:00
Simon Ser 1100f3a40b backend/drm: don't clear pending cursor FB on failed commit
The previous fix tried to side-step cursor->pending_fb completely.
However that messes up our buffer locking mechanism.

Instead, stop clearing the pending cursor FB on a failed commit. The
pending cursor FB will remain for the next commit.

Fixes: 6c3d080e25 ("backend/drm: populate cursor plane's current_fb")
(cherry picked from commit 4dee7a2f6f)
2021-07-07 19:24:47 +02:00
Simon Ser b213d2b81f Revert "backend/drm: populate cursor plane's current_fb"
This reverts commit 6c3d080e25.

Populating wlr_drm_plane.current_fb messes up the buffer's locking.
The previous buffer is released while it's still being displayed
on-screen.

(cherry picked from commit 5f26360bd8)
2021-07-07 19:24:47 +02:00
Simon Ser dc2e640a7d buffer: make enum wlr_buffer_cap public
Custom backends and renderers need to implement
wlr_backend_impl.get_buffer_caps and
wlr_renderer_impl.get_render_buffer_caps. They can't if enum
wlr_buffer_cap isn't made public.

(cherry picked from commit a38baec1f8)
2021-07-07 19:24:36 +02:00
Simon Ser 2f615468b6 backend: add output state allow-lists
Right now, when a new output state field is added, all backends by
default won't reject it. This means we need to add new checks to
each and every backend when we introduce a new state field.

Instead, introduce a bitmask of supported output state fields in
each backend, and error out if the user has submitted an unknown
field.

Some fields don't need any backend involvment to work. These are
listed in WLR_OUTPUT_STATE_BACKEND_OPTIONAL as a convenience.
2021-06-20 23:17:08 +02:00
Simon Ser 6c3d080e25 backend/drm: populate cursor plane's current_fb
The set_cursor() hook is a little bit special: it's not really
synchronized to commit() or test(). Once set_cursor() returns true,
the new cursor is part of the current state.

This fixes a state where wlr_drm_connector.cursor_enabled is true
but there is no FB available. This is triggered by set_cursor()
followed by a failed commit(), which resets pending_fb.

We should definitely fix the output interface to make the cursor part
of the pending state, but that's a more involved change.
2021-06-17 00:25:27 +02:00
Simon Ser 3345eaca89 backend/drm: remove test_buffer
Instead, call drm_connector_set_pending_fb.
2021-06-13 10:57:17 +02:00
Simon Ser eca5d2f37f backend/drm: move session check from test_buffer to drm_connector_test
The other caller (drm_connector_commit_state) already checks this.
2021-06-13 10:57:17 +02:00
Simon Ser 758f117442 backend/drm: move drm_connector_set_pending_fb up
This will be used in drm_connector_test shortly.
2021-06-13 10:57:17 +02:00
Simon Ser f55b43ddd6 backend/drm: allocate a CRTC in drm_connector_test
We can't perform a test-only atomic commit if the connector is
missing a CRTC.
2021-06-13 10:57:17 +02:00
Simon Ser cb378600e4 backend/drm: allocate a CRTC in drm_connector_commit_state
drm_connector_set_pending_fb needs a CRTC to import the buffer.
2021-06-13 10:57:17 +02:00
Simon Ser b180d3482f backend/drm: introduce drm_connector_alloc_crtc
This function allocates a CRTC for a connector if necessary.
2021-06-13 10:57:17 +02:00
Simon Ser 63f891e393 backend/drm: allow committing a buffer and a mode together
Set the plane's pending FB before calling drm_connector_set_mode.
2021-06-13 10:57:17 +02:00
Simon Ser e89cf5f047 backend/drm: use atomic test-only commits for modifier fallback
Instead of trying to perform a real modeset in init_renderer,
perform an atomic test-only commit to find out whether disabling
modifiers is necessary because of bandwidth limitations.

This decouples init_renderer from the actual commit, making it
possible to modeset an output with a user-supplied buffer instead
of a black frame.

We loose the ability to make sure the buffers coming from the
swapchain will work fine when using the legacy interface. This
can break i915 when atomic is disabled and modifiers enabled.
But i915 always has atomic (so the user must explicitly disable it
to run into potential bandwidth limitations) and is the only known
problematic driver.
2021-06-13 10:57:17 +02:00
Simon Ser b2f6db3533 render: drop wlr_ prefix from wlr_renderer_bind_buffer
Make it clear this function is a private wlroots API and will stay
that way.
2021-06-09 10:26:09 +02:00
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 01e0f51fad backend/drm: introduce drm_plane_pick_render_format
This is a new helper function to pick a render format suitable for
a plane.

The next commit will use it to initialize the cursor multi-GPU
surface.
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 7ec5bf6b10 backend: introduce wlr_backend_finish
This new functions cleans up the common backend state. While this
currently only emits the destroy signal, this will also clean up
the renderer and allocator in upcoming patches.
2021-05-21 22:13:54 +02:00
Simon Ser 9ca743f9fd backend/drm: use wlr_texture_from_buffer 2021-05-17 16:22:43 +02:00
Kenny Levinsen 2603a5dee7 backend/drm: Do not require mode commit on enable
If a mode is not provided, use the current mode intead.

Closes: https://github.com/swaywm/wlroots/issues/2904
2021-04-30 21:33:28 +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 e543e26206 backend/drm: take a wlr_drm_connector instead of a wlr_output
No need to take a generic wlr_output, we already know the output
comes from the DRM backend at that point.
2021-04-29 19:51:57 +02:00
Simon Ser e06c62af77 backend/drm: take output state arg in drm_connector_commit_buffer
This will allow a whole state to be applied at once, instead of
individually applying the buffer and the mode.
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 7aba881c47 backend/drm: remove mode arg from drm_connector_init_renderer
This is now unused.
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 c9c2d7539c backend/drm: fill scratch wlr_output_state for set_mode
Populate the wlr_output_state when setting a mode. This will allow
drm_connector_set_mode to stop relying on ephemeral fields in
wlr_drm_crtc. Also drm_connector_set_mode will be able to apply
both a new buffer and a new mode atomically.
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 Ser e7f68ba081 backend/drm: fix allocator DRM FD on multi-GPU setups
On multi-GPU setups, there is a primary DRM backend and secondary
DRM backends. wlr_backend_get_drm_fd will always return the parent
DRM FD even on secondary backends, so that users always use the
primary device for rendering.

However, for our internal rendering we want to use the secondary
device. Use allocator_autocreate_with_drm_fd to make sure the
allocator will create buffers on the secondary device.

We do something similar to ensure our internal rendering will
happen on the secondary device with renderer_autocreate_with_drm_fd.

Fixes: cc1b66364c ("backend: use wlr_allocator_autocreate")
2021-04-29 15:58:56 +02:00
Simon Ser 619a975025 render: remove wlr_ prefix from wlr_renderer_autocreate_with_drm_fd
This function is only required because the DRM backend still needs
to perform multi-GPU magic under-the-hood. Remove the wlr_ prefix
to make it clear it's not a candidate for being made public.
2021-04-29 09:46:34 +02:00
Simon Ser 6bf2406dbf backend/drm: reword wlr_renderer failure message
Remove the assumption about EGL.
2021-04-29 09:38:10 +02:00
Simon Zeni cc1b66364c backend: use wlr_allocator_autocreate 2021-04-28 20:55:57 +02:00
Simon Zeni 144189674e backend: introduce backend_get_buffer_caps 2021-04-28 20:55:57 +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 0411dc0663 Revert "backend/drm: fail instead of stripping a modifier"
This reverts commit f9f90b4173.

gbm_bo_get_modifier may return a modifier in these cases:

- The kernel doesn't support modifiers but Mesa does
- WLR_DRM_NO_MODIFIERS=1 is set

However, in both of these cases, the gbm_bo has been allocated
without modifiers.

There is already a check in drm_fb_create for modifiers:
wlr_drm_format_set_has will make sure buffers with an explicit
modifier will be rejected if the DRM backend doesn't support them.
So no need for an additional check in get_fb_for_bo.

Closes: https://github.com/swaywm/wlroots/issues/2896
2021-04-27 15:38:10 +02:00
Simon Ser 4839664a92 backend/drm: carry on when disabling a CRTC fails
On GPU unplug, disabling a CRTC can fail with EPERM.

References: https://github.com/swaywm/wlroots/pull/2575#issuecomment-761771264
2021-04-27 09:11:44 +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
Simon Ser e804de923d backend/drm: clarify error message on drmModeAddFB fallback
The previous code would always print "falling back to legacy method",
even if the format wasn't ARGB8888.

Drop get_fb_for_bo_legacy, since the code can just be inlined without
hurting readability.

Ideally we should only fallback to drmModeAddFB if the error code
indicates the BE failure, but the original PR [1] doesn't say what
error code is returned by the kernel.

[1]: https://github.com/swaywm/wlroots/pull/2569
2021-04-26 23:12:53 +02:00
Simon Ser f9f90b4173 backend/drm: fail instead of stripping a modifier
We shouldn't strip a modifiers from buffers, because the will make
the kernel re-interpret the data as LINEAR on most drivers,
resulting in an incorrect output on screen.
2021-04-26 23:12:53 +02:00
Simon Zeni 84dea55b20 render: rename get_dmabuf_render_formats into get_render_formats 2021-04-15 17:10:06 +02:00
Simon Ser 053ebe7c27 backend/drm: terminate display on drmHandleEvent failure 2021-04-14 23:56:56 +02:00
Stephan Hilb 9f012cac2f drm: check for PRIME support
PRIME support for buffer sharing has become mandatory since the renderer
rewrite. Make sure we check for the appropriate capabilities in backend,
allocator and renderer.

See also #2819.
2021-04-10 10:49:55 +02:00
Simon Ser 8ccb4bbb5f backend/drm: stop testing for buffer in drm_connector_commit_buffer
We now do the test in drm_connector_test, called from
drm_connector_commit.
2021-04-06 20:35:15 +02:00