[PATCH v3 2/8] drm/atomic: Add support for mouse hotspots
Zack Rusin
zack at kde.org
Tue Jun 27 03:58:33 UTC 2023
From: Zack Rusin <zackr at vmware.com>
Atomic modesetting code lacked support for specifying mouse cursor
hotspots. The legacy kms DRM_IOCTL_MODE_CURSOR2 had support for setting
the hotspot but the functionality was not implemented in the new atomic
paths.
Due to the lack of hotspots in the atomic paths userspace compositors
completely disable atomic modesetting for drivers that require it (i.e.
all paravirtualized drivers).
This change adds hotspot properties to the atomic codepaths throughtout
the DRM core and will allow enabling atomic modesetting for virtualized
drivers in the userspace.
Signed-off-by: Zack Rusin <zackr at vmware.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
---
drivers/gpu/drm/drm_atomic_state_helper.c | 14 +++++++
drivers/gpu/drm/drm_atomic_uapi.c | 20 +++++++++
drivers/gpu/drm/drm_plane.c | 51 +++++++++++++++++++++++
include/drm/drm_plane.h | 15 +++++++
4 files changed, 100 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 784e63d70a42..54975de44a0e 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -275,6 +275,20 @@ void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state,
plane_state->normalized_zpos = val;
}
}
+
+ if (plane->hotspot_x_property) {
+ if (!drm_object_property_get_default_value(&plane->base,
+ plane->hotspot_x_property,
+ &val))
+ plane_state->hotspot_x = val;
+ }
+
+ if (plane->hotspot_y_property) {
+ if (!drm_object_property_get_default_value(&plane->base,
+ plane->hotspot_y_property,
+ &val))
+ plane_state->hotspot_y = val;
+ }
}
EXPORT_SYMBOL(__drm_atomic_helper_plane_state_reset);
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 98d3b10c08ae..07a7b3f18df2 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -593,6 +593,22 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane,
} else if (plane->funcs->atomic_set_property) {
return plane->funcs->atomic_set_property(plane, state,
property, val);
+ } else if (property == plane->hotspot_x_property) {
+ if (plane->type != DRM_PLANE_TYPE_CURSOR) {
+ drm_dbg_atomic(plane->dev,
+ "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n",
+ plane->base.id, plane->name, val);
+ return -EINVAL;
+ }
+ state->hotspot_x = val;
+ } else if (property == plane->hotspot_y_property) {
+ if (plane->type != DRM_PLANE_TYPE_CURSOR) {
+ drm_dbg_atomic(plane->dev,
+ "[PLANE:%d:%s] is not a cursor plane: 0x%llx\n",
+ plane->base.id, plane->name, val);
+ return -EINVAL;
+ }
+ state->hotspot_y = val;
} else {
drm_dbg_atomic(plane->dev,
"[PLANE:%d:%s] unknown property [PROP:%d:%s]\n",
@@ -653,6 +669,10 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
*val = state->scaling_filter;
} else if (plane->funcs->atomic_get_property) {
return plane->funcs->atomic_get_property(plane, state, property, val);
+ } else if (property == plane->hotspot_x_property) {
+ *val = state->hotspot_x;
+ } else if (property == plane->hotspot_y_property) {
+ *val = state->hotspot_y;
} else {
drm_dbg_atomic(dev,
"[PLANE:%d:%s] unknown property [PROP:%d:%s]\n",
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index a4a39f4834e2..ff1cc810d8f8 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -348,6 +348,10 @@ static int __drm_universal_plane_init(struct drm_device *dev,
drm_object_attach_property(&plane->base, config->prop_src_w, 0);
drm_object_attach_property(&plane->base, config->prop_src_h, 0);
}
+ if (drm_core_check_feature(dev, DRIVER_CURSOR_HOTSPOT) &&
+ type == DRM_PLANE_TYPE_CURSOR) {
+ drm_plane_create_hotspot_properties(plane);
+ }
if (format_modifier_count)
create_in_format_blob(dev, plane);
@@ -1067,6 +1071,11 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc,
fb->hot_x = req->hot_x;
fb->hot_y = req->hot_y;
+
+ if (plane->hotspot_x_property && plane->state)
+ plane->state->hotspot_x = req->hot_x;
+ if (plane->hotspot_y_property && plane->state)
+ plane->state->hotspot_y = req->hot_y;
} else {
fb = NULL;
}
@@ -1595,3 +1604,45 @@ int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
return 0;
}
EXPORT_SYMBOL(drm_plane_create_scaling_filter_property);
+
+/**
+ * drm_plane_create_hotspot_properties - creates the mouse hotspot
+ * properties and attaches them to the given cursor plane
+ *
+ * @plane: drm cursor plane
+ *
+ * This function lets driver to enable the mouse hotspot property on a given
+ * cursor plane.
+ *
+ * RETURNS:
+ * Zero for success or -errno
+ */
+int drm_plane_create_hotspot_properties(struct drm_plane *plane)
+{
+ struct drm_property *prop_x;
+ struct drm_property *prop_y;
+
+ drm_WARN_ON(plane->dev,
+ !drm_core_check_feature(plane->dev,
+ DRIVER_CURSOR_HOTSPOT));
+
+ prop_x = drm_property_create_signed_range(plane->dev, 0, "HOTSPOT_X",
+ INT_MIN, INT_MAX);
+ if (IS_ERR(prop_x))
+ return PTR_ERR(prop_x);
+
+ prop_y = drm_property_create_signed_range(plane->dev, 0, "HOTSPOT_Y",
+ INT_MIN, INT_MAX);
+ if (IS_ERR(prop_y)) {
+ drm_property_destroy(plane->dev, prop_x);
+ return PTR_ERR(prop_y);
+ }
+
+ drm_object_attach_property(&plane->base, prop_x, 0);
+ drm_object_attach_property(&plane->base, prop_y, 0);
+ plane->hotspot_x_property = prop_x;
+ plane->hotspot_y_property = prop_y;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_plane_create_hotspot_properties);
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 51291983ea44..cf269d5de278 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -116,6 +116,10 @@ struct drm_plane_state {
/** @src_h: height of visible portion of plane (in 16.16) */
uint32_t src_h, src_w;
+ /** @hotspot_x: x offset to mouse cursor hotspot */
+ /** @hotspot_y: y offset to mouse cursor hotspot */
+ int32_t hotspot_x, hotspot_y;
+
/**
* @alpha:
* Opacity of the plane with 0 as completely transparent and 0xffff as
@@ -748,6 +752,16 @@ struct drm_plane {
* scaling.
*/
struct drm_property *scaling_filter_property;
+
+ /**
+ * @hotspot_x_property: property to set mouse hotspot x offset.
+ */
+ struct drm_property *hotspot_x_property;
+
+ /**
+ * @hotspot_y_property: property to set mouse hotspot y offset.
+ */
+ struct drm_property *hotspot_y_property;
};
#define obj_to_plane(x) container_of(x, struct drm_plane, base)
@@ -945,5 +959,6 @@ drm_plane_get_damage_clips(const struct drm_plane_state *state);
int drm_plane_create_scaling_filter_property(struct drm_plane *plane,
unsigned int supported_filters);
+int drm_plane_create_hotspot_properties(struct drm_plane *plane);
#endif
--
2.39.2
More information about the dri-devel
mailing list