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/rcar-du/rcar_du_drv.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index 5612a9e7a905..7b676b2f0f06 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c @@ -699,6 +699,9 @@ static struct platform_driver rcar_du_platform_driver = {
static int __init rcar_du_init(void) { + if (drm_firmware_drivers_only()) + return -ENODEV; + rcar_du_of_init(rcar_du_of_table);
return platform_driver_register(&rcar_du_platform_driver);