2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Author:Mark Yao <mark.yao@rock-chips.com>
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <linux/kernel.h>
18 #include <drm/drm_atomic.h>
19 #include <drm/drm_fb_helper.h>
20 #include <drm/drm_crtc_helper.h>
22 #include "rockchip_drm_drv.h"
23 #include "rockchip_drm_gem.h"
25 #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb)
27 struct rockchip_drm_fb {
28 struct drm_framebuffer fb;
29 struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER];
32 struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb,
35 struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb);
37 if (plane >= ROCKCHIP_MAX_FB_BUFFER)
40 return rk_fb->obj[plane];
42 EXPORT_SYMBOL_GPL(rockchip_fb_get_gem_obj);
44 static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb)
46 struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
47 struct drm_gem_object *obj;
50 for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) {
51 obj = rockchip_fb->obj[i];
53 drm_gem_object_unreference_unlocked(obj);
56 drm_framebuffer_cleanup(fb);
60 static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb,
61 struct drm_file *file_priv,
64 struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
66 return drm_gem_handle_create(file_priv,
67 rockchip_fb->obj[0], handle);
70 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
71 .destroy = rockchip_drm_fb_destroy,
72 .create_handle = rockchip_drm_fb_create_handle,
75 static struct rockchip_drm_fb *
76 rockchip_fb_alloc(struct drm_device *dev, struct drm_mode_fb_cmd2 *mode_cmd,
77 struct drm_gem_object **obj, unsigned int num_planes)
79 struct rockchip_drm_fb *rockchip_fb;
83 rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL);
85 return ERR_PTR(-ENOMEM);
87 drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd);
89 for (i = 0; i < num_planes; i++)
90 rockchip_fb->obj[i] = obj[i];
92 ret = drm_framebuffer_init(dev, &rockchip_fb->fb,
93 &rockchip_drm_fb_funcs);
95 dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
104 static struct drm_framebuffer *
105 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
106 struct drm_mode_fb_cmd2 *mode_cmd)
108 struct rockchip_drm_fb *rockchip_fb;
109 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
110 struct drm_gem_object *obj;
117 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
118 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
119 num_planes = min(drm_format_num_planes(mode_cmd->pixel_format),
120 ROCKCHIP_MAX_FB_BUFFER);
122 for (i = 0; i < num_planes; i++) {
123 unsigned int width = mode_cmd->width / (i ? hsub : 1);
124 unsigned int height = mode_cmd->height / (i ? vsub : 1);
125 unsigned int min_size;
127 obj = drm_gem_object_lookup(dev, file_priv,
128 mode_cmd->handles[i]);
130 dev_err(dev->dev, "Failed to lookup GEM object\n");
132 goto err_gem_object_unreference;
135 min_size = (height - 1) * mode_cmd->pitches[i] +
136 mode_cmd->offsets[i] +
137 width * drm_format_plane_cpp(mode_cmd->pixel_format, i);
139 if (obj->size < min_size) {
140 drm_gem_object_unreference_unlocked(obj);
142 goto err_gem_object_unreference;
147 rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
148 if (IS_ERR(rockchip_fb)) {
149 ret = PTR_ERR(rockchip_fb);
150 goto err_gem_object_unreference;
153 return &rockchip_fb->fb;
155 err_gem_object_unreference:
156 for (i--; i >= 0; i--)
157 drm_gem_object_unreference_unlocked(objs[i]);
161 static void rockchip_drm_output_poll_changed(struct drm_device *dev)
163 struct rockchip_drm_private *private = dev->dev_private;
164 struct drm_fb_helper *fb_helper = &private->fbdev_helper;
167 drm_fb_helper_hotplug_event(fb_helper);
170 static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc)
172 struct rockchip_drm_private *priv = crtc->dev->dev_private;
173 int pipe = drm_crtc_index(crtc);
174 const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe];
176 if (crtc_funcs && crtc_funcs->wait_for_update)
177 crtc_funcs->wait_for_update(crtc);
181 rockchip_atomic_wait_for_complete(struct drm_atomic_state *old_state)
183 struct drm_crtc_state *old_crtc_state;
184 struct drm_crtc *crtc;
187 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
188 /* No one cares about the old state, so abuse it for tracking
189 * and store whether we hold a vblank reference (and should do a
190 * vblank wait) in the ->enable boolean.
192 old_crtc_state->enable = false;
194 if (!crtc->state->active)
197 ret = drm_crtc_vblank_get(crtc);
201 old_crtc_state->enable = true;
204 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
205 if (!old_crtc_state->enable)
208 rockchip_crtc_wait_for_update(crtc);
209 drm_crtc_vblank_put(crtc);
213 int rockchip_drm_atomic_commit(struct drm_device *dev,
214 struct drm_atomic_state *state,
222 ret = drm_atomic_helper_prepare_planes(dev, state);
226 drm_atomic_helper_swap_state(dev, state);
229 * TODO: do fence wait here.
233 * Rockchip crtc support runtime PM, can't update display planes
234 * when crtc is disabled.
236 * drm_atomic_helper_commit comments detail that:
237 * For drivers supporting runtime PM the recommended sequence is
239 * drm_atomic_helper_commit_modeset_disables(dev, state);
241 * drm_atomic_helper_commit_modeset_enables(dev, state);
243 * drm_atomic_helper_commit_planes(dev, state, true);
245 * See the kerneldoc entries for these three functions for more details.
247 drm_atomic_helper_commit_modeset_disables(dev, state);
249 drm_atomic_helper_commit_modeset_enables(dev, state);
251 drm_atomic_helper_commit_planes(dev, state, true);
253 rockchip_atomic_wait_for_complete(state);
255 drm_atomic_helper_cleanup_planes(dev, state);
257 drm_atomic_state_free(state);
262 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
263 .fb_create = rockchip_user_fb_create,
264 .output_poll_changed = rockchip_drm_output_poll_changed,
265 .atomic_check = drm_atomic_helper_check,
266 .atomic_commit = rockchip_drm_atomic_commit,
269 struct drm_framebuffer *
270 rockchip_drm_framebuffer_init(struct drm_device *dev,
271 struct drm_mode_fb_cmd2 *mode_cmd,
272 struct drm_gem_object *obj)
274 struct rockchip_drm_fb *rockchip_fb;
276 rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1);
277 if (IS_ERR(rockchip_fb))
280 return &rockchip_fb->fb;
283 void rockchip_drm_mode_config_init(struct drm_device *dev)
285 dev->mode_config.min_width = 0;
286 dev->mode_config.min_height = 0;
289 * set max width and height as default value(4096x4096).
290 * this value would be used to check framebuffer size limitation
291 * at drm_mode_addfb().
293 dev->mode_config.max_width = 4096;
294 dev->mode_config.max_height = 4096;
296 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs;