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Simon Ser d71ed635b9 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		4 years ago
..
atomic.c	backend/drm: remove wlr_drm_crtc_state.mode	4 years ago
backend.c	backend/drm: force linear layout for multi-GPU buffers	4 years ago
cvt.c	backend/drm: add support for custom modes	5 years ago
drm.c	move wlr_box from /types to /util	4 years ago
legacy.c	backend/drm: remove wlr_drm_crtc_state.mode	4 years ago
meson.build	meson: Various improvements	5 years ago
properties.c	backend/drm: add support for the subconnector property	4 years ago
renderer.c	render: drop wlr_ prefix from wlr_renderer_bind_buffer	4 years ago
util.c	Revert "backend/drm: fail instead of stripping a modifier"	4 years ago