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Message-Id: <20211215010008.2545520-45-javierm@redhat.com>
Date: Wed, 15 Dec 2021 01:59:52 +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>,
Jyri Sarha <jyri.sarha@....fi>,
Tomi Valkeinen <tomba@...nel.org>
Subject: [PATCH 44/60] drm/tilcdc: 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/tilcdc/tilcdc_drv.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index 3ddb7c710a3d..25fe1f8de6bd 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -606,6 +606,9 @@ static struct platform_driver tilcdc_platform_driver = {
static int __init tilcdc_drm_init(void)
{
+ if (drm_firmware_drivers_only())
+ return -ENODEV;
+
DBG("init");
tilcdc_panel_init();
return platform_driver_register(&tilcdc_platform_driver);
--
2.33.1
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