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Message-Id: <20211215010008.2545520-7-javierm@redhat.com>
Date: Wed, 15 Dec 2021 01:59:14 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc: Javier Martinez Canillas <javierm@...hat.com>,
Boris Brezillon <bbrezillon@...nel.org>,
Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 06/60] drm/atmel-hlcdc: 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 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@...hat.com>
---
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
index 1656d27b78b6..4637177184ce 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -747,6 +747,9 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
struct drm_device *ddev;
int ret;
+ if (drm_firmware_drivers_only())
+ return -ENODEV;
+
ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
if (IS_ERR(ddev))
return PTR_ERR(ddev);
--
2.33.1
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