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[27/60] drm/omap: Add support for the nomodeset kernel parameter

Message ID 20211215010008.2545520-28-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State Superseded, archived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>
---

 drivers/gpu/drm/omapdrm/omap_drv.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 2720a58ccd90..eaf67b9e5f12 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -727,6 +727,9 @@  static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
 
 	DBG("%s", dev_name(dev));
 
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
 	/* Allocate and initialize the DRM device. */
 	ddev = drm_dev_alloc(&omap_drm_driver, dev);
 	if (IS_ERR(ddev))