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/atmel-hlcdc/atmel_hlcdc_dc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 1656d27b78b6..4637177184ce 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -747,6 +747,9 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev) struct drm_device *ddev; int ret;
+ if (drm_firmware_drivers_only()) + return -ENODEV; + ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev); if (IS_ERR(ddev)) return PTR_ERR(ddev);