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drm/xen: 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>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20211217003752.3946210-38-javierm@redhat.com
This commit is contained in:
Javier Martinez Canillas 2021-12-17 01:37:52 +01:00
parent 9b71ce89b5
commit 9d6bf79408
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GPG Key ID: C751E590D63F3D69
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/xen/xen_drm_front.c
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@ -495,6 +495,9 @@ static int xen_drm_drv_init(struct xen_drm_front_info *front_info)
struct drm_device *drm_dev;
int ret;
if (drm_firmware_drivers_only())
return -ENODEV;
DRM_INFO("Creating %s\n", xen_drm_driver.desc);
drm_info = kzalloc(sizeof(*drm_info), GFP_KERNEL);