On Mon, 26 Jun 2023 23:58:33 -0400 Zack Rusin <zack@xxxxxxx> wrote: > From: Zack Rusin <zackr@xxxxxxxxxx> > > 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@xxxxxxxxxx> > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> > Cc: Maxime Ripard <mripard@xxxxxxxxxx> > Cc: Thomas Zimmermann <tzimmermann@xxxxxxx> > Cc: David Airlie <airlied@xxxxxxxx> > Cc: Daniel Vetter <daniel@xxxxxxxx> > --- > 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(+) Hi Zack, where is the UAPI documentation for these new properties? I mean something ending up in the HTML docs like what other properties have in e.g. https://www.kernel.org/doc/html/latest/gpu/drm-kms.html#plane-composition-properties Otherwise looks fine to me. Could drm_plane_create_hotspot_properties() perhaps assert that the plane type is CURSOR? Thanks, pq > > 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
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