155 lines
5.5 KiB
C
155 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __DRM_GEM_ATOMIC_HELPER_H__
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#define __DRM_GEM_ATOMIC_HELPER_H__
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#include <linux/iosys-map.h>
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#include <drm/drm_format_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_plane.h>
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struct drm_simple_display_pipe;
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/*
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* Plane Helpers
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*/
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int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state);
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/*
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* Helpers for planes with shadow buffers
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*/
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/**
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* DRM_SHADOW_PLANE_MAX_WIDTH - Maximum width of a plane's shadow buffer in pixels
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*
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* For drivers with shadow planes, the maximum width of the framebuffer is
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* usually independent from hardware limitations. Drivers can initialize struct
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* drm_mode_config.max_width from DRM_SHADOW_PLANE_MAX_WIDTH.
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*/
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#define DRM_SHADOW_PLANE_MAX_WIDTH (4096u)
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/**
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* DRM_SHADOW_PLANE_MAX_HEIGHT - Maximum height of a plane's shadow buffer in scanlines
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*
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* For drivers with shadow planes, the maximum height of the framebuffer is
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* usually independent from hardware limitations. Drivers can initialize struct
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* drm_mode_config.max_height from DRM_SHADOW_PLANE_MAX_HEIGHT.
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*/
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#define DRM_SHADOW_PLANE_MAX_HEIGHT (4096u)
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/**
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* struct drm_shadow_plane_state - plane state for planes with shadow buffers
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*
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* For planes that use a shadow buffer, struct drm_shadow_plane_state
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* provides the regular plane state plus mappings of the shadow buffer
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* into kernel address space.
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*/
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struct drm_shadow_plane_state {
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/** @base: plane state */
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struct drm_plane_state base;
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/**
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* @fmtcnv_state: Format-conversion state
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*
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* Per-plane state for format conversion.
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* Flags for copying shadow buffers into backend storage. Also holds
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* temporary storage for format conversion.
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*/
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struct drm_format_conv_state fmtcnv_state;
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/* Transitional state - do not export or duplicate */
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/**
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* @map: Mappings of the plane's framebuffer BOs in to kernel address space
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*
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* The memory mappings stored in map should be established in the plane's
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* prepare_fb callback and removed in the cleanup_fb callback.
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*/
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struct iosys_map map[DRM_FORMAT_MAX_PLANES];
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/**
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* @data: Address of each framebuffer BO's data
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*
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* The address of the data stored in each mapping. This is different
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* for framebuffers with non-zero offset fields.
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*/
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struct iosys_map data[DRM_FORMAT_MAX_PLANES];
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};
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/**
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* to_drm_shadow_plane_state - upcasts from struct drm_plane_state
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* @state: the plane state
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*/
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static inline struct drm_shadow_plane_state *
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to_drm_shadow_plane_state(struct drm_plane_state *state)
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{
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return container_of(state, struct drm_shadow_plane_state, base);
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}
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void __drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane,
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struct drm_shadow_plane_state *new_shadow_plane_state);
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void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state);
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void __drm_gem_reset_shadow_plane(struct drm_plane *plane,
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struct drm_shadow_plane_state *shadow_plane_state);
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void drm_gem_reset_shadow_plane(struct drm_plane *plane);
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struct drm_plane_state *drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane);
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void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane,
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struct drm_plane_state *plane_state);
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/**
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* DRM_GEM_SHADOW_PLANE_FUNCS -
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* Initializes struct drm_plane_funcs for shadow-buffered planes
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*
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* Drivers may use GEM BOs as shadow buffers over the framebuffer memory. This
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* macro initializes struct drm_plane_funcs to use the rsp helper functions.
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*/
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#define DRM_GEM_SHADOW_PLANE_FUNCS \
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.reset = drm_gem_reset_shadow_plane, \
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.atomic_duplicate_state = drm_gem_duplicate_shadow_plane_state, \
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.atomic_destroy_state = drm_gem_destroy_shadow_plane_state
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int drm_gem_begin_shadow_fb_access(struct drm_plane *plane, struct drm_plane_state *plane_state);
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void drm_gem_end_shadow_fb_access(struct drm_plane *plane, struct drm_plane_state *plane_state);
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/**
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* DRM_GEM_SHADOW_PLANE_HELPER_FUNCS -
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* Initializes struct drm_plane_helper_funcs for shadow-buffered planes
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*
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* Drivers may use GEM BOs as shadow buffers over the framebuffer memory. This
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* macro initializes struct drm_plane_helper_funcs to use the rsp helper
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* functions.
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*/
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#define DRM_GEM_SHADOW_PLANE_HELPER_FUNCS \
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.begin_fb_access = drm_gem_begin_shadow_fb_access, \
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.end_fb_access = drm_gem_end_shadow_fb_access
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int drm_gem_simple_kms_begin_shadow_fb_access(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *plane_state);
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void drm_gem_simple_kms_end_shadow_fb_access(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *plane_state);
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void drm_gem_simple_kms_reset_shadow_plane(struct drm_simple_display_pipe *pipe);
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struct drm_plane_state *
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drm_gem_simple_kms_duplicate_shadow_plane_state(struct drm_simple_display_pipe *pipe);
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void drm_gem_simple_kms_destroy_shadow_plane_state(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *plane_state);
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/**
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* DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS -
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* Initializes struct drm_simple_display_pipe_funcs for shadow-buffered planes
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*
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* Drivers may use GEM BOs as shadow buffers over the framebuffer memory. This
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* macro initializes struct drm_simple_display_pipe_funcs to use the rsp helper
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* functions.
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*/
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#define DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS \
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.begin_fb_access = drm_gem_simple_kms_begin_shadow_fb_access, \
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.end_fb_access = drm_gem_simple_kms_end_shadow_fb_access, \
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.reset_plane = drm_gem_simple_kms_reset_shadow_plane, \
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.duplicate_plane_state = drm_gem_simple_kms_duplicate_shadow_plane_state, \
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.destroy_plane_state = drm_gem_simple_kms_destroy_shadow_plane_state
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#endif /* __DRM_GEM_ATOMIC_HELPER_H__ */
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