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820c170717
The function drm_gem_fb_prepare_fb() is a helper for atomic modesetting, but currently located next to framebuffer helpers. Move it to GEM atomic helpers, rename it slightly and adopt the drivers. Same for the rsp simple-pipe helper. Compile-tested with x86-64, aarch64 and arm. The patch is fairly large, but there are no functional changes. v3: * remove out-comented line in drm_gem_framebuffer_helper.h (Maxime) v2: * rename to drm_gem_plane_helper_prepare_fb() (Daniel) * add tutorial-style documentation Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Maxime Ripard <mripard@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210222141756.7864-1-tzimmermann@suse.de
113 lines
4 KiB
C
113 lines
4 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/dma-buf-map.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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int drm_gem_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *plane_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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* 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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/* 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 dma_buf_map map[4];
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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_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_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *plane_state);
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void drm_gem_cleanup_shadow_fb(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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.prepare_fb = drm_gem_prepare_shadow_fb, \
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.cleanup_fb = drm_gem_cleanup_shadow_fb
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int drm_gem_simple_kms_prepare_shadow_fb(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_cleanup_shadow_fb(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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.prepare_fb = drm_gem_simple_kms_prepare_shadow_fb, \
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.cleanup_fb = drm_gem_simple_kms_cleanup_shadow_fb, \
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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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