[PATCH v2 27/37] drm/mcde: Add support for the nomodeset kernel parameter

[Javier Martinez Canillas <javierm@redhat.com>]

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 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>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---

(no changes since v1)

 drivers/gpu/drm/mcde/mcde_drv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c
index 5b5afc6aaf8e..0b2910e69b42 100644
--- a/drivers/gpu/drm/mcde/mcde_drv.c
+++ b/drivers/gpu/drm/mcde/mcde_drv.c
@@ -491,6 +491,9 @@ static int __init mcde_drm_register(void)
 {
 	int ret;
 
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
 	ret = platform_register_drivers(component_drivers,
 					ARRAY_SIZE(component_drivers));
 	if (ret)
-- 
2.33.1