From: Zack Rusin zackr@vmware.com
Support for setting mouse cursor hotspot never made the transition from the legacy kms to atomic. This left virtualized drivers, all which are atomic, in a weird spot because all userspace compositors put those drivers on deny-lists for atomic kms due to the fact that mouse clicks were incorrectly routed, e.g: https://gitlab.gnome.org/GNOME/mutter/-/blob/main/src/backends/native/meta-k... https://invent.kde.org/plasma/kwin/-/blob/master/src/backends/drm/drm_gpu.cp...
So even though all the virtualized drm drivers are atomic, none of them could be used with atomic kms because of the missing mouse cursor hotspot support.
The first change adds support for mouse cursor hotspots to drm core atomic via the HOTSPOT_X and HOTSPOT_Y properties and implements it in the legacy paths. The next few changes add support for the mouse hotspot properties to all the drivers which required hotspots. And the final change removes the legacy hotspot code because it's unused.
A sample mutter patch which makes gnome-shell work with all the virtualized drivers with atomic kms is here: https://gitlab.gnome.org/zackr/mutter/-/commit/2aa61b50507a24f34d514fa65b7bc... I'll have a similar patch for kwin.
This gets virtualized drivers working correctly with atomic kms, but the hotspot codepaths aren't fool proof, e.g.: - there's no way of currently validating that the drm drivers actually did anything with the information and no way of testing it via igt, - all userspace code needs to hardcore a list of drivers which require hotspots because there's no way to query from drm "does this driver require hotspot"
Cc: Maarten Lankhorst maarten.lankhorst@linux.intel.com Cc: Maxime Ripard mripard@kernel.org Cc: Thomas Zimmermann tzimmermann@suse.de Cc: David Airlie airlied@linux.ie Cc: Daniel Vetter daniel@ffwll.ch Cc: Gerd Hoffmann kraxel@redhat.com Cc: Gurchetan Singh gurchetansingh@chromium.org Cc: Chia-I Wu olvaffe@gmail.com Cc: Hans de Goede hdegoede@redhat.com
Zack Rusin (6): drm/atomic: Add support for mouse hotspots drm/vmwgfx: Create mouse hotspot properties on cursor planes drm/qxl: Create mouse hotspot properties on cursor planes drm/vboxvideo: Create mouse hotspot properties on cursor planes drm/virtio: Create mouse hotspot properties on cursor planes drm: Remove legacy cursor hotspot code
drivers/gpu/drm/drm_atomic_state_helper.c | 14 ++++++++ drivers/gpu/drm/drm_atomic_uapi.c | 20 +++++++++++ drivers/gpu/drm/drm_plane.c | 44 +++++++++++++++++++++-- drivers/gpu/drm/qxl/qxl_display.c | 13 +++---- drivers/gpu/drm/vboxvideo/vbox_mode.c | 5 +-- drivers/gpu/drm/virtio/virtgpu_display.c | 1 + drivers/gpu/drm/virtio/virtgpu_plane.c | 8 ++--- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 11 ++---- drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c | 2 ++ drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c | 1 + drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c | 2 ++ include/drm/drm_framebuffer.h | 12 ------- include/drm/drm_plane.h | 15 ++++++++ 13 files changed, 113 insertions(+), 35 deletions(-)