drm: Don't allow page flip to change pixel format
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>
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@ -3638,6 +3638,12 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
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goto out;
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}
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if (crtc->fb->pixel_format != fb->pixel_format) {
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DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
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ret = -EINVAL;
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goto out;
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}
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if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
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ret = -ENOMEM;
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spin_lock_irqsave(&dev->event_lock, flags);
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