drm: Don't test for IRQ support in VBLANK ioctls

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For KMS drivers, replace the IRQ check in VBLANK ioctls with a check for
vblank support. IRQs might be enabled wthout vblanking being supported.

This change also removes the DRM framework's only dependency on IRQ state
for non-legacy drivers. For legacy drivers with userspace modesetting,
the original test remains in drm_wait_vblank_ioctl().

v4:
	* avoid preprocessor ifdef in drm_wait_vblank_ioctl()
	  (Jani, Thierry)
v3:
	* optimize test in drm_wait_vblank_ioctl() for KMS case (Liviu)
	* update docs for drm_irq_uninstall()
v2:
	* keep the old test for legacy drivers in
	  drm_wait_vblank_ioctl() (Daniel)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625082222.3845-5-tzimmermann@suse.de

...

This commit is contained in:

Thomas Zimmermann 2021-06-25 10:21:59 +02:00

parent b2ffa2c25b

commit 1e4cd78ed4

2 changed files with 16 additions and 12 deletions

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13

drivers/gpu/drm/drm_irq.c

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15

drivers/gpu/drm/drm_vblank.c

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