| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20251018-vkms-all-config-v1-4-a7760755d92d@bootlin.com>
Date: Sat, 18 Oct 2025 04:01:04 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Haneen Mohammed <hamohammed.sa@...il.com>,
Simona Vetter <simona@...ll.ch>, Melissa Wen <melissa.srw@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, jose.exposito89@...il.com,
Jonathan Corbet <corbet@....net>
Cc: victoria@...tem76.com, sebastian.wick@...hat.com, victoria@...tem76.com,
airlied@...il.com, thomas.petazzoni@...tlin.com,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-doc@...r.kernel.org, Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH 04/22] drm/vkms: Introduce configfs for plane rotation
To allows the userspace to test many hardware configuration, introduce a
new interface to configure the available rotation per planes. VKMS
supports any rotation and reflection, so the userspace can choose any
combination.
The supported rotations are configured by writing a rotation bitmask to
the file `supported_rotations` and the default rotation is chosen by
writing a rotation bitmask to `default_rotation`.
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
Documentation/gpu/vkms.rst | 7 ++-
drivers/gpu/drm/vkms/vkms_configfs.c | 94 ++++++++++++++++++++++++++++++++++++
2 files changed, 100 insertions(+), 1 deletion(-)
diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst
index 3574e01b928d..a432968cc711 100644
--- a/Documentation/gpu/vkms.rst
+++ b/Documentation/gpu/vkms.rst
@@ -87,10 +87,15 @@ Start by creating one or more planes::
sudo mkdir /config/vkms/my-vkms/planes/plane0
-Planes have 1 configurable attribute:
+Planes have 3 configurable attribute:
- type: Plane type: 0 overlay, 1 primary, 2 cursor (same values as those
exposed by the "type" property of a plane)
+- possible_rotations: Available rotation for a plane, as a bitmask: 0x01 no rotation,
+ 0x02 rotate 90°, 0x04 rotate 180°, 0x08 rotate 270°, 0x10 reflect x, 0x20 reflect y
+ (same values as those exposed by the "rotation" property of a plane)
+- default_rotation: Default rotation presented to the userspace, same values as
+ possible_rotations.
Continue by creating one or more CRTCs::
diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c b/drivers/gpu/drm/vkms/vkms_configfs.c
index ea245e2e2fd2..450e45e66a45 100644
--- a/drivers/gpu/drm/vkms/vkms_configfs.c
+++ b/drivers/gpu/drm/vkms/vkms_configfs.c
@@ -322,10 +322,104 @@ static ssize_t plane_type_store(struct config_item *item, const char *page,
return (ssize_t)count;
}
+static ssize_t plane_supported_rotations_show(struct config_item *item, char *page)
+{
+ struct vkms_configfs_plane *plane;
+ unsigned int plane_supported_rotations;
+
+ plane = plane_item_to_vkms_configfs_plane(item);
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ plane_supported_rotations = vkms_config_plane_get_supported_rotations(plane->config);
+ }
+
+ return sprintf(page, "%u", plane_supported_rotations);
+}
+
+static ssize_t plane_supported_rotations_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct vkms_configfs_plane *plane = plane_item_to_vkms_configfs_plane(item);
+ int ret, val = 0;
+
+ ret = kstrtouint(page, 0, &val);
+ if (ret)
+ return ret;
+
+ /* Should be a supported value */
+ if (val & ~(DRM_MODE_ROTATE_MASK | DRM_MODE_REFLECT_MASK))
+ return -EINVAL;
+ /* Should at least provide one rotation */
+ if (!(val & DRM_MODE_ROTATE_MASK))
+ return -EINVAL;
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ /* Ensures that the default rotation is included in supported rotation */
+ if (plane->dev->enabled ||
+ (val & vkms_config_plane_get_default_rotation(plane->config)) !=
+ vkms_config_plane_get_default_rotation(plane->config))
+ return -EINVAL;
+
+ vkms_config_plane_set_supported_rotations(plane->config, val);
+ }
+
+ return count;
+}
+
+static ssize_t plane_default_rotation_show(struct config_item *item, char *page)
+{
+ struct vkms_configfs_plane *plane;
+ unsigned int plane_default_rotation;
+
+ plane = plane_item_to_vkms_configfs_plane(item);
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ plane_default_rotation = vkms_config_plane_get_default_rotation(plane->config);
+ }
+
+ return sprintf(page, "%u", plane_default_rotation);
+}
+
+static ssize_t plane_default_rotation_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct vkms_configfs_plane *plane = plane_item_to_vkms_configfs_plane(item);
+ int ret, val = 0;
+
+ ret = kstrtouint(page, 10, &val);
+ if (ret)
+ return ret;
+
+ /* Should be a supported value */
+ if (val & ~(DRM_MODE_ROTATE_MASK | DRM_MODE_REFLECT_MASK))
+ return -EINVAL;
+ /* Should at least provide one rotation */
+ if ((val & DRM_MODE_ROTATE_MASK) == 0)
+ return -EINVAL;
+ /* Should contains only one rotation */
+ if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK))
+ return -EINVAL;
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ /* Ensures that the default rotation is included in supported rotation */
+ if (plane->dev->enabled ||
+ (val & vkms_config_plane_get_supported_rotations(plane->config)) != val)
+ return -EINVAL;
+
+ vkms_config_plane_set_default_rotation(plane->config, val);
+ }
+
+ return count;
+}
+
CONFIGFS_ATTR(plane_, type);
+CONFIGFS_ATTR(plane_, supported_rotations);
+CONFIGFS_ATTR(plane_, default_rotation);
static struct configfs_attribute *plane_item_attrs[] = {
&plane_attr_type,
+ &plane_attr_supported_rotations,
+ &plane_attr_default_rotation,
NULL,
};
--
2.51.0
Powered by blists - more mailing lists