diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_crtc.h | 68 |
1 files changed, 50 insertions, 18 deletions
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 44a98082d409..f09391f9cac0 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -162,23 +162,55 @@ struct drm_tile_group { u8 group_data[8]; }; +/** + * struct drm_framebuffer_funcs - framebuffer hooks + */ struct drm_framebuffer_funcs { - /* note: use drm_framebuffer_remove() */ + /** + * @destroy: + * + * Clean up framebuffer resources, specifically also unreference the + * backing storage. The core guarantees to call this function for every + * framebuffer successfully created by ->fb_create() in + * &drm_mode_config_funcs. + */ void (*destroy)(struct drm_framebuffer *framebuffer); + + /** + * @create_handle: + * + * Create a buffer handle in the driver-specific buffer manager (either + * GEM or TTM) valid for the passed-in struct &drm_file. This is used by + * the core to implement the GETFB IOCTL, which returns (for + * sufficiently priviledged user) also a native buffer handle. This can + * be used for seamless transitions between modesetting clients by + * copying the current screen contents to a private buffer and blending + * between that and the new contents. + * + * RETURNS: + * + * 0 on success or a negative error code on failure. + */ int (*create_handle)(struct drm_framebuffer *fb, struct drm_file *file_priv, unsigned int *handle); - /* - * Optional callback for the dirty fb ioctl. + /** + * @dirty: * - * Userspace can notify the driver via this callback - * that a area of the framebuffer has changed and should - * be flushed to the display hardware. + * Optional callback for the dirty fb IOCTL. * - * See documentation in drm_mode.h for the struct - * drm_mode_fb_dirty_cmd for more information as all - * the semantics and arguments have a one to one mapping - * on this function. + * Userspace can notify the driver via this callback that an area of the + * framebuffer has changed and should be flushed to the display + * hardware. This can also be used internally, e.g. by the fbdev + * emulation, though that's not the case currently. + * + * See documentation in drm_mode.h for the struct drm_mode_fb_dirty_cmd + * for more information as all the semantics and arguments have a one to + * one mapping on this function. + * + * RETURNS: + * + * 0 on success or a negative error code on failure. */ int (*dirty)(struct drm_framebuffer *framebuffer, struct drm_file *file_priv, unsigned flags, @@ -627,7 +659,7 @@ struct drm_crtc_funcs { * @atomic_get_property: * * Reads out the decoded driver-private property. This is used to - * implement the GETCRTC ioctl. + * implement the GETCRTC IOCTL. * * Do not call this function directly, use * drm_atomic_crtc_get_property() instead. @@ -670,7 +702,7 @@ struct drm_crtc_funcs { * @properties: property tracking for this CRTC * @state: current atomic state for this CRTC * @acquire_ctx: per-CRTC implicit acquire context used by atomic drivers for - * legacy ioctls + * legacy IOCTLs * * Each CRTC may have one or more connectors associated with it. This structure * allows the CRTC to be controlled. @@ -724,7 +756,7 @@ struct drm_crtc { struct drm_crtc_state *state; /* - * For legacy crtc ioctls so that atomic drivers can get at the locking + * For legacy crtc IOCTLs so that atomic drivers can get at the locking * acquire context. */ struct drm_modeset_acquire_ctx *acquire_ctx; @@ -968,7 +1000,7 @@ struct drm_connector_funcs { * @atomic_get_property: * * Reads out the decoded driver-private property. This is used to - * implement the GETCONNECTOR ioctl. + * implement the GETCONNECTOR IOCTL. * * Do not call this function directly, use * drm_atomic_connector_get_property() instead. @@ -1269,7 +1301,7 @@ struct drm_plane_funcs { * @disable_plane: * * This is the legacy entry point to disable the plane. The DRM core - * calls this method in response to a DRM_IOCTL_MODE_SETPLANE ioctl call + * calls this method in response to a DRM_IOCTL_MODE_SETPLANE IOCTL call * with the frame buffer ID set to 0. Disabled planes must not be * processed by the CRTC. * @@ -1413,7 +1445,7 @@ struct drm_plane_funcs { * @atomic_get_property: * * Reads out the decoded driver-private property. This is used to - * implement the GETPLANE ioctl. + * implement the GETPLANE IOCTL. * * Do not call this function directly, use * drm_atomic_plane_get_property() instead. @@ -1628,7 +1660,7 @@ struct drm_bridge { * struct drm_atomic_state - the global state object for atomic updates * @dev: parent DRM device * @allow_modeset: allow full modeset - * @legacy_cursor_update: hint to enforce legacy cursor ioctl semantics + * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics * @planes: pointer to array of plane pointers * @plane_states: pointer to array of plane states pointers * @crtcs: pointer to array of CRTC pointers @@ -1716,7 +1748,7 @@ struct drm_mode_config_funcs { * @mutex: mutex protecting KMS related lists and structures * @connection_mutex: ww mutex protecting connector state and routing * @acquire_ctx: global implicit acquire context used by atomic drivers for - * legacy ioctls + * legacy IOCTLs * @idr_mutex: mutex for KMS ID allocation and management * @crtc_idr: main KMS ID tracking object * @fb_lock: mutex to protect fb state and lists |