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_fb.h"
24 #include "rockchip_drm_gem.h"
25 #include "rockchip_drm_psr.h"
27 #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb)
29 struct rockchip_drm_fb {
30 struct drm_framebuffer fb;
31 struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER];
34 struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb,
37 struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb);
39 if (plane >= ROCKCHIP_MAX_FB_BUFFER)
42 return rk_fb->obj[plane];
45 static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb)
47 struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
50 for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++)
51 drm_gem_object_unreference_unlocked(rockchip_fb->obj[i]);
53 drm_framebuffer_cleanup(fb);
57 static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb,
58 struct drm_file *file_priv,
61 struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb);
63 return drm_gem_handle_create(file_priv,
64 rockchip_fb->obj[0], handle);
67 static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb,
68 struct drm_file *file,
69 unsigned int flags, unsigned int color,
70 struct drm_clip_rect *clips,
71 unsigned int num_clips)
73 rockchip_drm_psr_flush(fb->dev);
77 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
78 .destroy = rockchip_drm_fb_destroy,
79 .create_handle = rockchip_drm_fb_create_handle,
80 .dirty = rockchip_drm_fb_dirty,
83 static struct rockchip_drm_fb *
84 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd,
85 struct drm_gem_object **obj, unsigned int num_planes)
87 struct rockchip_drm_fb *rockchip_fb;
91 rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL);
93 return ERR_PTR(-ENOMEM);
95 drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd);
97 for (i = 0; i < num_planes; i++)
98 rockchip_fb->obj[i] = obj[i];
100 ret = drm_framebuffer_init(dev, &rockchip_fb->fb,
101 &rockchip_drm_fb_funcs);
103 dev_err(dev->dev, "Failed to initialize framebuffer: %d\n",
112 static struct drm_framebuffer *
113 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
114 const struct drm_mode_fb_cmd2 *mode_cmd)
116 struct rockchip_drm_fb *rockchip_fb;
117 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER];
118 struct drm_gem_object *obj;
125 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
126 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
127 num_planes = min(drm_format_num_planes(mode_cmd->pixel_format),
128 ROCKCHIP_MAX_FB_BUFFER);
130 for (i = 0; i < num_planes; i++) {
131 unsigned int width = mode_cmd->width / (i ? hsub : 1);
132 unsigned int height = mode_cmd->height / (i ? vsub : 1);
133 unsigned int min_size;
135 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]);
137 dev_err(dev->dev, "Failed to lookup GEM object\n");
139 goto err_gem_object_unreference;
142 min_size = (height - 1) * mode_cmd->pitches[i] +
143 mode_cmd->offsets[i] +
144 width * drm_format_plane_cpp(mode_cmd->pixel_format, i);
146 if (obj->size < min_size) {
147 drm_gem_object_unreference_unlocked(obj);
149 goto err_gem_object_unreference;
154 rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i);
155 if (IS_ERR(rockchip_fb)) {
156 ret = PTR_ERR(rockchip_fb);
157 goto err_gem_object_unreference;
160 return &rockchip_fb->fb;
162 err_gem_object_unreference:
163 for (i--; i >= 0; i--)
164 drm_gem_object_unreference_unlocked(objs[i]);
168 static void rockchip_drm_output_poll_changed(struct drm_device *dev)
170 struct rockchip_drm_private *private = dev->dev_private;
171 struct drm_fb_helper *fb_helper = &private->fbdev_helper;
174 drm_fb_helper_hotplug_event(fb_helper);
177 static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc)
179 struct rockchip_drm_private *priv = crtc->dev->dev_private;
180 int pipe = drm_crtc_index(crtc);
181 const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe];
183 if (crtc_funcs && crtc_funcs->wait_for_update)
184 crtc_funcs->wait_for_update(crtc);
188 * We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066
189 * have hardware counters for neither vblanks nor scanlines, which results in
191 * | <-- HW vsync irq and reg take effect
193 * get_vblank and wait --> |
194 * | <-- handle_vblank, vblank->count + 1
197 * | <-- HW vsync irq and reg take effect
199 * This function is equivalent but uses rockchip_crtc_wait_for_update() instead
200 * of waiting for vblank_count to change.
203 rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state)
205 struct drm_crtc_state *old_crtc_state;
206 struct drm_crtc *crtc;
209 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
210 /* No one cares about the old state, so abuse it for tracking
211 * and store whether we hold a vblank reference (and should do a
212 * vblank wait) in the ->enable boolean.
214 old_crtc_state->enable = false;
216 if (!crtc->state->active)
219 if (!drm_atomic_helper_framebuffer_changed(dev,
223 ret = drm_crtc_vblank_get(crtc);
227 old_crtc_state->enable = true;
230 for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
231 if (!old_crtc_state->enable)
234 rockchip_crtc_wait_for_update(crtc);
235 drm_crtc_vblank_put(crtc);
240 rockchip_atomic_commit_tail(struct drm_atomic_state *state)
242 struct drm_device *dev = state->dev;
244 drm_atomic_helper_commit_modeset_disables(dev, state);
246 drm_atomic_helper_commit_modeset_enables(dev, state);
248 drm_atomic_helper_commit_planes(dev, state,
249 DRM_PLANE_COMMIT_ACTIVE_ONLY);
251 drm_atomic_helper_commit_hw_done(state);
253 rockchip_atomic_wait_for_complete(dev, state);
255 drm_atomic_helper_cleanup_planes(dev, state);
258 static struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = {
259 .atomic_commit_tail = rockchip_atomic_commit_tail,
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 = drm_atomic_helper_commit,
269 struct drm_framebuffer *
270 rockchip_drm_framebuffer_init(struct drm_device *dev,
271 const 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;
297 dev->mode_config.helper_private = &rockchip_mode_config_helpers;