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@redhat.com ---
drivers/gpu/drm/sis/sis_drv.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/sis/sis_drv.c b/drivers/gpu/drm/sis/sis_drv.c index e35e719cf315..d592af70e8be 100644 --- a/drivers/gpu/drm/sis/sis_drv.c +++ b/drivers/gpu/drm/sis/sis_drv.c @@ -126,6 +126,9 @@ static struct pci_driver sis_pci_driver = {
static int __init sis_init(void) { + if (drm_firmware_drivers_only()) + return -ENODEV; + driver.num_ioctls = sis_max_ioctl; return drm_legacy_pci_init(&driver, &sis_pci_driver); }