The DRIVER_FIRMWARE flag denotes that a DRM driver uses a framebuffer that was initialized and provided by the system firmware for scanout.
Indicate to the fbdev subsystem that the registered framebuffer is a FBINFO_MISC_FIRMWARE, so that it can handle accordingly. For example, wold hot-unplug the associated device if asked to remove conflicting framebuffers. Suggested-by: Thomas Zimmermann <[email protected]> Signed-off-by: Javier Martinez Canillas <[email protected]> --- (no changes since v1) drivers/gpu/drm/drm_fb_helper.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index d265a73313c9..76dd11888621 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1891,6 +1891,10 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper, /* don't leak any physical addresses to userspace */ info->flags |= FBINFO_HIDE_SMEM_START; + /* Indicate that the framebuffer is provided by the firmware */ + if (drm_core_check_feature(dev, DRIVER_FIRMWARE)) + info->flags |= FBINFO_MISC_FIRMWARE; + /* Need to drop locks to avoid recursive deadlock in * register_framebuffer. This is ok because the only thing left to do is * register the fbdev emulation instance in kernel_fb_helper_list. */ -- 2.35.1
