1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author:Mark Yao <mark.yao@rock-chips.com>
7 #include <linux/kernel.h>
10 #include <drm/drm_atomic.h>
11 #include <drm/drm_damage_helper.h>
12 #include <drm/drm_fb_helper.h>
13 #include <drm/drm_gem_framebuffer_helper.h>
14 #include <drm/drm_probe_helper.h>
16 #include "rockchip_drm_drv.h"
17 #include "rockchip_drm_fb.h"
18 #include "rockchip_drm_gem.h"
19 #include "rockchip_drm_psr.h"
21 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
22 .destroy = drm_gem_fb_destroy,
23 .create_handle = drm_gem_fb_create_handle,
24 .dirty = drm_atomic_helper_dirtyfb,
27 static struct drm_framebuffer *
28 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
29 struct drm_gem_object **obj, unsigned int num_planes)
31 struct drm_framebuffer *fb;
35 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
37 return ERR_PTR(-ENOMEM);
39 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
41 for (i = 0; i < num_planes; i++)
44 ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs);
46 DRM_DEV_ERROR(dev->dev,
47 "Failed to initialize framebuffer: %d\n",
56 static struct drm_framebuffer *
57 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
58 const struct drm_mode_fb_cmd2 *mode_cmd)
60 const struct drm_format_info *info = drm_get_format_info(dev,
62 struct drm_framebuffer *fb;
63 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
64 struct drm_gem_object *obj;
65 int num_planes = min_t(int, info->num_planes, ROCKCHIP_MAX_FB_BUFFER);
69 for (i = 0; i < num_planes; i++) {
70 unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
71 unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
72 unsigned int min_size;
74 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
76 DRM_DEV_ERROR(dev->dev,
77 "Failed to lookup GEM object\n");
79 goto err_gem_object_unreference;
82 min_size = (height - 1) * mode_cmd->pitches[i] +
83 mode_cmd->offsets[i] +
86 if (obj->size < min_size) {
87 drm_gem_object_put_unlocked(obj);
89 goto err_gem_object_unreference;
94 fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
97 goto err_gem_object_unreference;
102 err_gem_object_unreference:
103 for (i--; i >= 0; i--)
104 drm_gem_object_put_unlocked(objs[i]);
109 rockchip_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state)
111 struct drm_device *dev = old_state->dev;
113 rockchip_drm_psr_inhibit_get_state(old_state);
115 drm_atomic_helper_commit_modeset_disables(dev, old_state);
117 drm_atomic_helper_commit_modeset_enables(dev, old_state);
119 drm_atomic_helper_commit_planes(dev, old_state,
120 DRM_PLANE_COMMIT_ACTIVE_ONLY);
122 rockchip_drm_psr_inhibit_put_state(old_state);
124 drm_atomic_helper_commit_hw_done(old_state);
126 drm_atomic_helper_wait_for_vblanks(dev, old_state);
128 drm_atomic_helper_cleanup_planes(dev, old_state);
131 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
132 .atomic_commit_tail = rockchip_atomic_helper_commit_tail_rpm,
135 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
136 .fb_create = rockchip_user_fb_create,
137 .output_poll_changed = drm_fb_helper_output_poll_changed,
138 .atomic_check = drm_atomic_helper_check,
139 .atomic_commit = drm_atomic_helper_commit,
142 struct drm_framebuffer *
143 rockchip_drm_framebuffer_init(struct drm_device *dev,
144 const struct drm_mode_fb_cmd2 *mode_cmd,
145 struct drm_gem_object *obj)
147 struct drm_framebuffer *fb;
149 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
156 void rockchip_drm_mode_config_init(struct drm_device *dev)
158 dev->mode_config.min_width = 0;
159 dev->mode_config.min_height = 0;
162 * set max width and height as default value(4096x4096).
163 * this value would be used to check framebuffer size limitation
164 * at drm_mode_addfb().
166 dev->mode_config.max_width = 4096;
167 dev->mode_config.max_height = 4096;
169 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;
170 dev->mode_config.helper_private = &rockchip_mode_config_helpers;