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> --- drivers/gpu/drm/arm/hdlcd_drv.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c index 479c2422a2e0..0939a64a9bd2 100644 --- a/drivers/gpu/drm/arm/hdlcd_drv.c +++ b/drivers/gpu/drm/arm/hdlcd_drv.c @@ -382,6 +382,9 @@ static int hdlcd_probe(struct platform_device *pdev) struct device_node *port; struct component_match *match = NULL; + if (drm_firmware_drivers_only()) + return -ENODEV; + /* there is only one output port inside each device, find it */ port = of_graph_get_remote_node(pdev->dev.of_node, 0, 0); if (!port) -- 2.33.1
