From 297332a0320e661035db618ea40c3a3fdcc48a18 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 25 Mar 2020 15:43:10 +0100 Subject: [PATCH] drm/vboxvideo: Add missing remove_conflicting_pci_framebuffers call, v2 The vboxvideo driver is missing a call to remove conflicting framebuffers. Surprisingly, when using legacy BIOS booting this does not really cause any issues. But when using UEFI to boot the VM then plymouth will draw on both the efifb /dev/fb0 and /dev/drm/card0 (which has registered /dev/fb1 as fbdev emulation). VirtualBox will actual display the output of both devices (I guess it is showing whatever was drawn last), this causes weird artifacts because of pitch issues in the efifb when the VM window is not sized at 1024x768 (the window will resize to its last size once the vboxvideo driver loads, changing the pitch). Adding the missing drm_fb_helper_remove_conflicting_pci_framebuffers() call fixes this. Changes in v2: -Make the drm_fb_helper_remove_conflicting_pci_framebuffers() call one of the first things we do in our probe() method Cc: stable@vger.kernel.org Fixes: e186cf817550 ("drm/vboxvideo: Switch to generic fbdev emulation") Signed-off-by: Hans de Goede Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20200325144310.36779-1-hdegoede@redhat.com --- drivers/gpu/drm/vboxvideo/vbox_drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c index 8512d970a09fd..ac8f75db2ecd8 100644 --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c @@ -41,6 +41,10 @@ static int vbox_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (!vbox_check_supported(VBE_DISPI_ID_HGSMI)) return -ENODEV; + ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "vboxvideodrmfb"); + if (ret) + return ret; + vbox = kzalloc(sizeof(*vbox), GFP_KERNEL); if (!vbox) return -ENOMEM; -- 2.39.5