Den 15.12.2021 01.59, skrev Javier Martinez Canillas: > According to disable Documentation/admin-guide/kernel-parameters.txt, this > parameter can be used to disable kernel modesetting. > > DRM drivers will not perform display-mode changes or accelerated rendering > and only the systewm system framebuffer will be available if it was set-up. > > But only a few DRM drivers currently check for nomodeset, make this driver > to also support the command line parameter. > > Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx> > --- > I don't understand why this is applicable to USB drivers, there's no way the firmware can setup a framebuffer and continue pushing pixels over USB when Linux has been given control over the USB bus? The same argument goes for the SPI drivers in drm/tiny/ as well. Noralf. > drivers/gpu/drm/gud/gud_drv.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/gud/gud_drv.c b/drivers/gpu/drm/gud/gud_drv.c > index 3f9d4b9a1e3d..4d253d249512 100644 > --- a/drivers/gpu/drm/gud/gud_drv.c > +++ b/drivers/gpu/drm/gud/gud_drv.c > @@ -446,6 +446,9 @@ static int gud_probe(struct usb_interface *intf, const struct usb_device_id *id) > u32 *formats; > int ret, i; > > + if (drm_firmware_drivers_only()) > + return -ENODEV; > + > ret = usb_find_bulk_out_endpoint(intf->cur_altsetting, &bulk_out); > if (ret) > return ret; >
