/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef __DRM_GEM_ATOMIC_HELPER_H__ #define __DRM_GEM_ATOMIC_HELPER_H__ #include <linux/iosys-map.h> #include <drm/drm_format_helper.h> #include <drm/drm_fourcc.h> #include <drm/drm_plane.h> struct drm_simple_display_pipe; /* * Plane Helpers */ int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state); /* * Helpers for planes with shadow buffers */ /** * DRM_SHADOW_PLANE_MAX_WIDTH - Maximum width of a plane's shadow buffer in pixels * * For drivers with shadow planes, the maximum width of the framebuffer is * usually independent from hardware limitations. Drivers can initialize struct * drm_mode_config.max_width from DRM_SHADOW_PLANE_MAX_WIDTH. */ #define DRM_SHADOW_PLANE_MAX_WIDTH … /** * DRM_SHADOW_PLANE_MAX_HEIGHT - Maximum height of a plane's shadow buffer in scanlines * * For drivers with shadow planes, the maximum height of the framebuffer is * usually independent from hardware limitations. Drivers can initialize struct * drm_mode_config.max_height from DRM_SHADOW_PLANE_MAX_HEIGHT. */ #define DRM_SHADOW_PLANE_MAX_HEIGHT … /** * struct drm_shadow_plane_state - plane state for planes with shadow buffers * * For planes that use a shadow buffer, struct drm_shadow_plane_state * provides the regular plane state plus mappings of the shadow buffer * into kernel address space. */ struct drm_shadow_plane_state { … }; /** * to_drm_shadow_plane_state - upcasts from struct drm_plane_state * @state: the plane state */ static inline struct drm_shadow_plane_state * to_drm_shadow_plane_state(struct drm_plane_state *state) { … } void __drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane, struct drm_shadow_plane_state *new_shadow_plane_state); void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state); void __drm_gem_reset_shadow_plane(struct drm_plane *plane, struct drm_shadow_plane_state *shadow_plane_state); void drm_gem_reset_shadow_plane(struct drm_plane *plane); struct drm_plane_state *drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane); void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane, struct drm_plane_state *plane_state); /** * DRM_GEM_SHADOW_PLANE_FUNCS - * Initializes struct drm_plane_funcs for shadow-buffered planes * * Drivers may use GEM BOs as shadow buffers over the framebuffer memory. This * macro initializes struct drm_plane_funcs to use the rsp helper functions. */ #define DRM_GEM_SHADOW_PLANE_FUNCS … int drm_gem_begin_shadow_fb_access(struct drm_plane *plane, struct drm_plane_state *plane_state); void drm_gem_end_shadow_fb_access(struct drm_plane *plane, struct drm_plane_state *plane_state); /** * DRM_GEM_SHADOW_PLANE_HELPER_FUNCS - * Initializes struct drm_plane_helper_funcs for shadow-buffered planes * * Drivers may use GEM BOs as shadow buffers over the framebuffer memory. This * macro initializes struct drm_plane_helper_funcs to use the rsp helper * functions. */ #define DRM_GEM_SHADOW_PLANE_HELPER_FUNCS … int drm_gem_simple_kms_begin_shadow_fb_access(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state); void drm_gem_simple_kms_end_shadow_fb_access(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state); void drm_gem_simple_kms_reset_shadow_plane(struct drm_simple_display_pipe *pipe); struct drm_plane_state * drm_gem_simple_kms_duplicate_shadow_plane_state(struct drm_simple_display_pipe *pipe); void drm_gem_simple_kms_destroy_shadow_plane_state(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state); /** * DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS - * Initializes struct drm_simple_display_pipe_funcs for shadow-buffered planes * * Drivers may use GEM BOs as shadow buffers over the framebuffer memory. This * macro initializes struct drm_simple_display_pipe_funcs to use the rsp helper * functions. */ #define DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS … #endif /* __DRM_GEM_ATOMIC_HELPER_H__ */
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