From: Javier Martinez Canillas Date: Fri, 17 Dec 2021 00:37:43 +0000 (+0100) Subject: drm/mediatek: Add support for the nomodeset kernel parameter X-Git-Tag: v5.18-rc1~134^2~14^2~127 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c0a23916f4ae880d0265e19255997825b374baf0;p=thirdparty%2Fkernel%2Flinux.git drm/mediatek: 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 Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20211217003752.3946210-29-javierm@redhat.com --- diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index aec39724ebeb6..e336358fee20c 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -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;