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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: 6c3d080e25e5 ("backend/drm: populate cursor plane's current_fb")
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This reverts commit 6c3d080e25e56404228ad7704eed43e40fa0c623.
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.
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Instead of using a single-field wl_list, let's just use a wl_array.
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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.
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This is more consistent with the rest of the wlroots naming.
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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.
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Instead of hardcoding the string "card", use DRM_PRIMARY_MINOR_NAME.
Some systems may use another prefix, e.g. OpenBSD uses "drm" instead.
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This moves the magic incantation into libdrm and is clearer. See
[1] for details.
While at it, fixup the doc comment and improve logging.
[1]: https://gitlab.freedesktop.org/mesa/drm/-/commit/523b3658aa8efa746417e916c987de23740ce313
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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.
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Instead, call drm_connector_set_pending_fb.
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The other caller (drm_connector_commit_state) already checks this.
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This will be used in drm_connector_test shortly.
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We can't perform a test-only atomic commit if the connector is
missing a CRTC.
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drm_connector_set_pending_fb needs a CRTC to import the buffer.
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This function allocates a CRTC for a connector if necessary.
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Set the plane's pending FB before calling drm_connector_set_mode.
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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.
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Make it clear this function is a private wlroots API and will stay
that way.
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Rely on wlr_output's generic swapchain handling.
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Rely on wlr_output's generic swapchain handling.
We still need a renderer for cursor readback, sadly.
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Rely on wlr_output's generic swapchain support instead of creating our
own. The headless output now simply keeps a reference to the front buffer
and does nothing else.
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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.
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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.
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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.
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This was always set to ARGB8888.
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When picking a format, the backend needs to know whether the
buffers allocated by the allocator will be DMA-BUFs or shared
memory. So far, the backend used the renderer's supported
buffer types to guess this information.
This is pretty fragile: renderers in general don't care about the
SHM cap (they only care about the DATA_PTR one). Additionally,
nothing stops a renderer from supporting both DMA-BUFs and shared
memory, but this would break the backend's guess.
Instead, use wlr_allocator.buffer_caps. This is more reliable since
the buffers created with the allocator are guaranteed to have these
caps.
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Instead of managing our own renderer and allocator, let the common
code do it.
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Instead of managing our own renderer and allocator, let the common
code do it.
Because wlr_headless_backend_create_with_renderer needs to re-use
the parent renderer, we have to hand-roll some of the renderer
initialization.
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Instead of managing our own renderer and allocator, let the common
code do it.
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Introduce a new backend_get_allocator function that automatically
creates an allocator for the backend if the backend has a renderer.
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If a backend accepts buffers (as indicated by get_buffer_caps) but
doesn't implement get_renderer, automatically create a renderer.
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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.
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If a mode is not provided, use the current mode intead.
Closes: https://github.com/swaywm/wlroots/issues/2904
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We were not dup'ing the DRM FD coming from wlr_renderer_get_drm_fd,
resulting in a double-close on backend destroy.
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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.
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No need to take a generic wlr_output, we already know the output
comes from the DRM backend at that point.
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This will allow a whole state to be applied at once, instead of
individually applying the buffer and the mode.
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All of the information is in wlr_output_state.
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