diff mbox series

[52/60] drm/mi0283qt: Add support for the nomodeset kernel parameter

Message ID 20211215010008.2545520-53-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State Superseded, archived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, 1 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/tiny/mi0283qt.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Noralf Trønnes Dec. 16, 2021, 3:48 p.m. UTC | #1 
Den 15.12.2021 02.00, skrev Javier Martinez Canillas:
> 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>
> ---

Acked-by: Noralf Trønnes <noralf@tronnes.org>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/tiny/mi0283qt.c b/drivers/gpu/drm/tiny/mi0283qt.c
index 023de49e7a8e..f96fd350d373 100644
--- a/drivers/gpu/drm/tiny/mi0283qt.c
+++ b/drivers/gpu/drm/tiny/mi0283qt.c
@@ -186,6 +186,9 @@  static int mi0283qt_probe(struct spi_device *spi)
 	u32 rotation = 0;
 	int ret;
 
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
 	dbidev = devm_drm_dev_alloc(dev, &mi0283qt_driver,
 				    struct mipi_dbi_dev, drm);
 	if (IS_ERR(dbidev))