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authorJavier Martinez Canillas <javierm@redhat.com>2021-12-17 01:37:50 +0100
committerJavier Martinez Canillas <javierm@redhat.com>2022-01-27 19:15:50 +0100
commit93804f5d2dd2f9c1b7f45fe630a2f5302ae0dcfb (patch)
treef0ec055b4020df486a5dc69674fd3bbddc58077a
parent89ec0023200e20ab4f601aaae1e457a0026209bc (diff)
downloadlinux-93804f5d2dd2f9c1b7f45fe630a2f5302ae0dcfb.tar.gz
drm/tegra: Add support for the nomodeset kernel parameter
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>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20211217003752.3946210-36-javierm@redhat.com
-rw-r--r--drivers/gpu/drm/tegra/drm.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index 8d37d6b00562..48e35d686473 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -1382,6 +1382,9 @@ static int __init host1x_drm_init(void)
 {
 	int err;
 
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
 	err = host1x_driver_register(&host1x_drm_driver);
 	if (err < 0)
 		return err;