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drm/mediatek: Add support for the nomodeset kernel parameter

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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/20211217003752.3946210-29-javierm@redhat.com
This commit is contained in:
Javier Martinez Canillas 2021-12-17 01:37:43 +01:00
parent ab120b9264
commit c0a23916f4
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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/mediatek/mtk_drm_drv.c
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@ -210,6 +210,9 @@ static int mtk_drm_kms_init(struct drm_device *drm)
struct device *dma_dev;
int ret;
if (drm_firmware_drivers_only())
return -ENODEV;
if (!iommu_present(&platform_bus_type))
return -EPROBE_DEFER;