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[12/60] drm/hisilicon/hibmc: Add support for the nomodeset kernel parameter

Message ID 20211215010008.2545520-13-javierm@redhat.com (mailing list archive)
State Superseded, archived
Headers show
Series drm: Make all drivers to honour the nomodeset parameter | expand

Commit Message

Javier Martinez Canillas Dec. 15, 2021, 12:59 a.m. UTC 
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@redhat.com>
Patch-cc:Tian Tao <tiantao6@hisilicon.com>
---

 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index 610fc8e135f9..f66de93831c6 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -315,6 +315,9 @@  static int hibmc_pci_probe(struct pci_dev *pdev,
 	struct drm_device *dev;
 	int ret;
 
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
 	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &hibmc_driver);
 	if (ret)
 		return ret;