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drm: Don't allow page flip to change pixel format

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A page flip is not a mode set, changing the frame buffer pixel format
doesn't make sense and isn't handled by most drivers anyway. Disallow
it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Laurent Pinchart 2013-04-22 01:38:46 +02:00 committed by Dave Airlie
parent 64c026e28d
commit 909d9cda2e
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/drm_crtc.c
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@ -3638,6 +3638,12 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
goto out;
}
if (crtc->fb->pixel_format != fb->pixel_format) {
DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
ret = -EINVAL;
goto out;
}
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
ret = -ENOMEM;
spin_lock_irqsave(&dev->event_lock, flags);