linux-kernel - [PATCH v7 01/16] drm/vkms: Expose device creation and destruction

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Message-ID: <20251016175618.10051-2-jose.exposito89@gmail.com>
Date: Thu, 16 Oct 2025 19:56:03 +0200
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,
	sebastian.wick@...hat.com,
	xaver.hugl@....org,
	victoria@...tem76.com,
	a.hindborg@...nel.org,
	leitao@...ian.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	José Expósito <jose.exposito89@...il.com>,
	Mark Yacoub <markyacoub@...gle.com>,
	Harry Wentland <harry.wentland@....com>,
	Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH v7 01/16] drm/vkms: Expose device creation and destruction

In preparation for configfs support, expose vkms_create() and
vkms_destroy().

Tested-by: Mark Yacoub <markyacoub@...gle.com>
Reviewed-by: Louis Chauvet <louis.chauvet@...tlin.com>
Reviewed-by: Harry Wentland <harry.wentland@....com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
Co-developed-by: Louis Chauvet <louis.chauvet@...tlin.com>
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
Signed-off-by: José Expósito <jose.exposito89@...il.com>
---
 drivers/gpu/drm/vkms/vkms_drv.c |  4 ++--
 drivers/gpu/drm/vkms/vkms_drv.h | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index e8472d9b6e3b..78af37c7bd83 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -146,7 +146,7 @@ static int vkms_modeset_init(struct vkms_device *vkmsdev)
 	return vkms_output_init(vkmsdev);
 }
 
-static int vkms_create(struct vkms_config *config)
+int vkms_create(struct vkms_config *config)
 {
 	int ret;
 	struct faux_device *fdev;
@@ -229,7 +229,7 @@ static int __init vkms_init(void)
 	return 0;
 }
 
-static void vkms_destroy(struct vkms_config *config)
+void vkms_destroy(struct vkms_config *config)
 {
 	struct faux_device *fdev;
 
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index fb9711e1c6fb..db260df1d4f6 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -256,6 +256,26 @@ struct vkms_device {
 #define to_vkms_plane_state(target)\
 	container_of(target, struct vkms_plane_state, base.base)
 
+/**
+ * vkms_create() - Create a device from a configuration
+ * @config: Config used to configure the new device
+ *
+ * A pointer to the created vkms_device is stored in @config
+ *
+ * Returns:
+ * 0 on success or an error.
+ */
+int vkms_create(struct vkms_config *config);
+
+/**
+ * vkms_destroy() - Destroy a device
+ * @config: Config from which the device was created
+ *
+ * The device is completely removed, but the @config is not freed. It can be
+ * reused or destroyed with vkms_config_destroy().
+ */
+void vkms_destroy(struct vkms_config *config);
+
 /**
  * vkms_crtc_init() - Initialize a CRTC for VKMS
  * @dev: DRM device associated with the VKMS buffer
-- 
2.51.0