[PATCH 05/60] drm/aspeed: 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 systewm 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@xxxxxxxxxx>
---

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

diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
index b53fee6f1c17..c70d8f046816 100644
--- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
+++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
@@ -310,6 +310,9 @@ static int aspeed_gfx_probe(struct platform_device *pdev)
 	struct aspeed_gfx *priv;
 	int ret;
 
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
 	priv = devm_drm_dev_alloc(&pdev->dev, &aspeed_gfx_driver,
 				  struct aspeed_gfx, drm);
 	if (IS_ERR(priv))
-- 
2.33.1




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