linux-kernel - [PATCH 15/16] drm/vkms: Allow to configure the default device creation

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Message-ID: <20250218170808.9507-16-jose.exposito89@gmail.com>
Date: Tue, 18 Feb 2025 18:08:07 +0100
From: José Expósito <jose.exposito89@...il.com>
To: louis.chauvet@...tlin.com
Cc: hamohammed.sa@...il.com,
	simona@...ll.ch,
	melissa.srw@...il.com,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	José Expósito <jose.exposito89@...il.com>
Subject: [PATCH 15/16] drm/vkms: Allow to configure the default device creation

Add a new module param to allow to create or not the default VKMS
instance. Useful when combined with configfs to avoid having additional
VKMS instances.

Signed-off-by: José Expósito <jose.exposito89@...il.com>
---
 drivers/gpu/drm/vkms/vkms_drv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 5bcfbcb6c0c5..b4ed19c97576 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -50,6 +50,10 @@ static bool enable_overlay;
 module_param_named(enable_overlay, enable_overlay, bool, 0444);
 MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support");
 
+static bool create_default_dev = true;
+module_param_named(create_default_dev, create_default_dev, bool, 0444);
+MODULE_PARM_DESC(create_default_dev, "Create or not the default VKMS device");
+
 DEFINE_DRM_GEM_FOPS(vkms_driver_fops);
 
 static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
@@ -219,6 +223,9 @@ static int __init vkms_init(void)
 	if (ret)
 		return ret;
 
+	if (!create_default_dev)
+		return 0;
+
 	config = vkms_config_default_create(enable_cursor, enable_writeback, enable_overlay);
 	if (IS_ERR(config))
 		return PTR_ERR(config);
-- 
2.48.1