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| author |   Javier Martinez Canillas <javierm@redhat.com> | 2021-11-11 12:57:57 +0100 |
|---|---|---|
| committer | Javier Martinez Canillas <javierm@redhat.com> | 2021-11-17 10:15:05 +0100 |
| commit | fb561bf9abde49f7e00fdbf9ed2ccf2d86cac8ee (patch) | |
| tree | 1c5cf23c0590bc95cf5b43aca47c1509849a8d52 /drivers/gpu/drm/nouveau/nvkm/subdev | |
| parent | drm/scheduler: fix drm_sched_job_add_implicit_dependencies harder (diff) | |
| download | linux-dev-fb561bf9abde49f7e00fdbf9ed2ccf2d86cac8ee.tar.xz linux-dev-fb561bf9abde49f7e00fdbf9ed2ccf2d86cac8ee.zip | |
fbdev: Prevent probing generic drivers if a FB is already registered
The efifb and simplefb drivers just render to a pre-allocated frame buffer
and rely on the display hardware being initialized before the kernel boots.
But if another driver already probed correctly and registered a fbdev, the
generic drivers shouldn't be probed since an actual driver for the display
hardware is already present.
This is more likely to occur after commit d391c5827107 ("drivers/firmware:
move x86 Generic System Framebuffers support") since the "efi-framebuffer"
and "simple-framebuffer" platform devices are registered at a later time.
Link: https://lore.kernel.org/r/20211110200253.rfudkt3edbd3nsyj@lahvuun/
Fixes: d391c5827107 ("drivers/firmware: move x86 Generic System Framebuffers support")
Reported-by: Ilya Trukhanov <lahvuun@gmail.com>
Cc: <stable@vger.kernel.org> # 5.15.x
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Ilya Trukhanov <lahvuun@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211111115757.1351045-1-javierm@redhat.com
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev')
0 files changed, 0 insertions, 0 deletions