mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 04:34:08 +08:00
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
114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
#ifndef __DRM_GEM_ATOMIC_HELPER_H__
|
|
#define __DRM_GEM_ATOMIC_HELPER_H__
|
|
|
|
#include <linux/dma-buf-map.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);
|
|
int drm_gem_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
|
|
struct drm_plane_state *plane_state);
|
|
|
|
/*
|
|
* Helpers for planes with shadow buffers
|
|
*/
|
|
|
|
/**
|
|
* 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 {
|
|
/** @base: plane state */
|
|
struct drm_plane_state base;
|
|
|
|
/* Transitional state - do not export or duplicate */
|
|
|
|
/**
|
|
* @map: Mappings of the plane's framebuffer BOs in to kernel address space
|
|
*
|
|
* The memory mappings stored in map should be established in the plane's
|
|
* prepare_fb callback and removed in the cleanup_fb callback.
|
|
*/
|
|
struct dma_buf_map map[4];
|
|
};
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
return container_of(state, struct drm_shadow_plane_state, base);
|
|
}
|
|
|
|
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 \
|
|
.reset = drm_gem_reset_shadow_plane, \
|
|
.atomic_duplicate_state = drm_gem_duplicate_shadow_plane_state, \
|
|
.atomic_destroy_state = drm_gem_destroy_shadow_plane_state
|
|
|
|
int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *plane_state);
|
|
void drm_gem_cleanup_shadow_fb(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 \
|
|
.prepare_fb = drm_gem_prepare_shadow_fb, \
|
|
.cleanup_fb = drm_gem_cleanup_shadow_fb
|
|
|
|
int drm_gem_simple_kms_prepare_shadow_fb(struct drm_simple_display_pipe *pipe,
|
|
struct drm_plane_state *plane_state);
|
|
void drm_gem_simple_kms_cleanup_shadow_fb(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 \
|
|
.prepare_fb = drm_gem_simple_kms_prepare_shadow_fb, \
|
|
.cleanup_fb = drm_gem_simple_kms_cleanup_shadow_fb, \
|
|
.reset_plane = drm_gem_simple_kms_reset_shadow_plane, \
|
|
.duplicate_plane_state = drm_gem_simple_kms_duplicate_shadow_plane_state, \
|
|
.destroy_plane_state = drm_gem_simple_kms_destroy_shadow_plane_state
|
|
|
|
#endif /* __DRM_GEM_ATOMIC_HELPER_H__ */
|