drm: Implement struct vga_switcheroo_client_ops.pre_switch

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Call drm_client_dev_acquire_outputs() from vga_switcheroo's pre_switch
callback. Pushes fbcon updates from vga_switcheroo into DRM's fbdev
emulation. This affects amdgpu, i915, nouveau and radeon. No other
drivers implement vga_switcheroo.

Also remove the calls to vga_switcheroo_client_fb_set() from fbcon. It
is called from the DRM client's hotplug and sets the fbcon's framebuffer
at vga_switcheroo. Running pre_switch and hotplug concurrently could
result in a deadlock between clientlist_mutex and vgasr_mutex. Hence
clean up fbcon here as well.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Lyude Paul <lyude@redhat.com> # nouveau
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patch.msgid.link/20260709092215.168172-6-tzimmermann@suse.de

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This commit is contained in:

Thomas Zimmermann 2026-07-09 11:16:01 +02:00

parent 649e96efe2

commit 0fbd06de08

5 changed files with 35 additions and 8 deletions

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8

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

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10

drivers/gpu/drm/i915/i915_switcheroo.c

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9

drivers/gpu/drm/nouveau/nouveau_vga.c

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8

drivers/gpu/drm/radeon/radeon_device.c

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8

drivers/video/fbdev/core/fbcon.c

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