Commit | Line | Data |
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2048e328 MY |
1 | /* |
2 | * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd | |
3 | * Author:Mark Yao <mark.yao@rock-chips.com> | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <drm/drm.h> | |
17 | #include <drm/drmP.h> | |
63ebb9fa | 18 | #include <drm/drm_atomic.h> |
2048e328 MY |
19 | #include <drm/drm_fb_helper.h> |
20 | #include <drm/drm_crtc_helper.h> | |
21 | ||
22 | #include "rockchip_drm_drv.h" | |
a7e03fb5 | 23 | #include "rockchip_drm_fb.h" |
2048e328 MY |
24 | #include "rockchip_drm_gem.h" |
25 | ||
26 | #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) | |
27 | ||
28 | struct rockchip_drm_fb { | |
29 | struct drm_framebuffer fb; | |
30 | struct drm_gem_object *obj[ROCKCHIP_MAX_FB_BUFFER]; | |
31 | }; | |
32 | ||
33 | struct drm_gem_object *rockchip_fb_get_gem_obj(struct drm_framebuffer *fb, | |
34 | unsigned int plane) | |
35 | { | |
36 | struct rockchip_drm_fb *rk_fb = to_rockchip_fb(fb); | |
37 | ||
38 | if (plane >= ROCKCHIP_MAX_FB_BUFFER) | |
39 | return NULL; | |
40 | ||
41 | return rk_fb->obj[plane]; | |
42 | } | |
2048e328 MY |
43 | |
44 | static void rockchip_drm_fb_destroy(struct drm_framebuffer *fb) | |
45 | { | |
46 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
2048e328 MY |
47 | int i; |
48 | ||
f5e193a1 ME |
49 | for (i = 0; i < ROCKCHIP_MAX_FB_BUFFER; i++) |
50 | drm_gem_object_unreference_unlocked(rockchip_fb->obj[i]); | |
2048e328 MY |
51 | |
52 | drm_framebuffer_cleanup(fb); | |
53 | kfree(rockchip_fb); | |
54 | } | |
55 | ||
56 | static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, | |
57 | struct drm_file *file_priv, | |
58 | unsigned int *handle) | |
59 | { | |
60 | struct rockchip_drm_fb *rockchip_fb = to_rockchip_fb(fb); | |
61 | ||
62 | return drm_gem_handle_create(file_priv, | |
63 | rockchip_fb->obj[0], handle); | |
64 | } | |
65 | ||
28c508ec | 66 | static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { |
2048e328 MY |
67 | .destroy = rockchip_drm_fb_destroy, |
68 | .create_handle = rockchip_drm_fb_create_handle, | |
69 | }; | |
70 | ||
71 | static struct rockchip_drm_fb * | |
1eb83451 | 72 | rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
73 | struct drm_gem_object **obj, unsigned int num_planes) |
74 | { | |
75 | struct rockchip_drm_fb *rockchip_fb; | |
76 | int ret; | |
77 | int i; | |
78 | ||
79 | rockchip_fb = kzalloc(sizeof(*rockchip_fb), GFP_KERNEL); | |
80 | if (!rockchip_fb) | |
81 | return ERR_PTR(-ENOMEM); | |
82 | ||
83 | drm_helper_mode_fill_fb_struct(&rockchip_fb->fb, mode_cmd); | |
84 | ||
85 | for (i = 0; i < num_planes; i++) | |
86 | rockchip_fb->obj[i] = obj[i]; | |
87 | ||
88 | ret = drm_framebuffer_init(dev, &rockchip_fb->fb, | |
89 | &rockchip_drm_fb_funcs); | |
90 | if (ret) { | |
91 | dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", | |
92 | ret); | |
93 | kfree(rockchip_fb); | |
94 | return ERR_PTR(ret); | |
95 | } | |
96 | ||
97 | return rockchip_fb; | |
98 | } | |
99 | ||
100 | static struct drm_framebuffer * | |
101 | rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, | |
1eb83451 | 102 | const struct drm_mode_fb_cmd2 *mode_cmd) |
2048e328 MY |
103 | { |
104 | struct rockchip_drm_fb *rockchip_fb; | |
105 | struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; | |
106 | struct drm_gem_object *obj; | |
107 | unsigned int hsub; | |
108 | unsigned int vsub; | |
109 | int num_planes; | |
110 | int ret; | |
111 | int i; | |
112 | ||
113 | hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format); | |
114 | vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format); | |
115 | num_planes = min(drm_format_num_planes(mode_cmd->pixel_format), | |
116 | ROCKCHIP_MAX_FB_BUFFER); | |
117 | ||
118 | for (i = 0; i < num_planes; i++) { | |
119 | unsigned int width = mode_cmd->width / (i ? hsub : 1); | |
120 | unsigned int height = mode_cmd->height / (i ? vsub : 1); | |
121 | unsigned int min_size; | |
122 | ||
a8ad0bd8 | 123 | obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); |
2048e328 MY |
124 | if (!obj) { |
125 | dev_err(dev->dev, "Failed to lookup GEM object\n"); | |
126 | ret = -ENXIO; | |
127 | goto err_gem_object_unreference; | |
128 | } | |
129 | ||
130 | min_size = (height - 1) * mode_cmd->pitches[i] + | |
131 | mode_cmd->offsets[i] + | |
132 | width * drm_format_plane_cpp(mode_cmd->pixel_format, i); | |
133 | ||
134 | if (obj->size < min_size) { | |
135 | drm_gem_object_unreference_unlocked(obj); | |
136 | ret = -EINVAL; | |
137 | goto err_gem_object_unreference; | |
138 | } | |
139 | objs[i] = obj; | |
140 | } | |
141 | ||
142 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); | |
143 | if (IS_ERR(rockchip_fb)) { | |
144 | ret = PTR_ERR(rockchip_fb); | |
145 | goto err_gem_object_unreference; | |
146 | } | |
147 | ||
148 | return &rockchip_fb->fb; | |
149 | ||
150 | err_gem_object_unreference: | |
151 | for (i--; i >= 0; i--) | |
152 | drm_gem_object_unreference_unlocked(objs[i]); | |
153 | return ERR_PTR(ret); | |
154 | } | |
155 | ||
156 | static void rockchip_drm_output_poll_changed(struct drm_device *dev) | |
157 | { | |
158 | struct rockchip_drm_private *private = dev->dev_private; | |
159 | struct drm_fb_helper *fb_helper = &private->fbdev_helper; | |
160 | ||
765c35bb HS |
161 | if (fb_helper) |
162 | drm_fb_helper_hotplug_event(fb_helper); | |
2048e328 MY |
163 | } |
164 | ||
63ebb9fa MY |
165 | static void rockchip_crtc_wait_for_update(struct drm_crtc *crtc) |
166 | { | |
167 | struct rockchip_drm_private *priv = crtc->dev->dev_private; | |
168 | int pipe = drm_crtc_index(crtc); | |
169 | const struct rockchip_crtc_funcs *crtc_funcs = priv->crtc_funcs[pipe]; | |
170 | ||
171 | if (crtc_funcs && crtc_funcs->wait_for_update) | |
172 | crtc_funcs->wait_for_update(crtc); | |
173 | } | |
174 | ||
c9ad1d99 JK |
175 | /* |
176 | * We can't use drm_atomic_helper_wait_for_vblanks() because rk3288 and rk3066 | |
177 | * have hardware counters for neither vblanks nor scanlines, which results in | |
178 | * a race where: | |
179 | * | <-- HW vsync irq and reg take effect | |
180 | * plane_commit --> | | |
181 | * get_vblank and wait --> | | |
182 | * | <-- handle_vblank, vblank->count + 1 | |
183 | * cleanup_fb --> | | |
184 | * iommu crash --> | | |
185 | * | <-- HW vsync irq and reg take effect | |
186 | * | |
187 | * This function is equivalent but uses rockchip_crtc_wait_for_update() instead | |
188 | * of waiting for vblank_count to change. | |
189 | */ | |
63ebb9fa | 190 | static void |
f2227f46 | 191 | rockchip_atomic_wait_for_complete(struct drm_device *dev, struct drm_atomic_state *old_state) |
63ebb9fa MY |
192 | { |
193 | struct drm_crtc_state *old_crtc_state; | |
194 | struct drm_crtc *crtc; | |
195 | int i, ret; | |
196 | ||
197 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { | |
198 | /* No one cares about the old state, so abuse it for tracking | |
199 | * and store whether we hold a vblank reference (and should do a | |
200 | * vblank wait) in the ->enable boolean. | |
201 | */ | |
202 | old_crtc_state->enable = false; | |
203 | ||
204 | if (!crtc->state->active) | |
205 | continue; | |
206 | ||
f2227f46 JK |
207 | if (!drm_atomic_helper_framebuffer_changed(dev, |
208 | old_state, crtc)) | |
209 | continue; | |
210 | ||
63ebb9fa MY |
211 | ret = drm_crtc_vblank_get(crtc); |
212 | if (ret != 0) | |
213 | continue; | |
214 | ||
215 | old_crtc_state->enable = true; | |
216 | } | |
217 | ||
218 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { | |
219 | if (!old_crtc_state->enable) | |
220 | continue; | |
221 | ||
222 | rockchip_crtc_wait_for_update(crtc); | |
223 | drm_crtc_vblank_put(crtc); | |
224 | } | |
225 | } | |
226 | ||
f32fad51 | 227 | static void |
893b6cad | 228 | rockchip_atomic_commit_tail(struct drm_atomic_state *state) |
63ebb9fa | 229 | { |
893b6cad | 230 | struct drm_device *dev = state->dev; |
63ebb9fa | 231 | |
63ebb9fa MY |
232 | drm_atomic_helper_commit_modeset_disables(dev, state); |
233 | ||
234 | drm_atomic_helper_commit_modeset_enables(dev, state); | |
235 | ||
236 | drm_atomic_helper_commit_planes(dev, state, true); | |
237 | ||
893b6cad DV |
238 | drm_atomic_helper_commit_hw_done(state); |
239 | ||
f2227f46 | 240 | rockchip_atomic_wait_for_complete(dev, state); |
63ebb9fa MY |
241 | |
242 | drm_atomic_helper_cleanup_planes(dev, state); | |
f32fad51 MY |
243 | } |
244 | ||
8ff490ae | 245 | static struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { |
893b6cad DV |
246 | .atomic_commit_tail = rockchip_atomic_commit_tail, |
247 | }; | |
63ebb9fa | 248 | |
2048e328 MY |
249 | static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { |
250 | .fb_create = rockchip_user_fb_create, | |
251 | .output_poll_changed = rockchip_drm_output_poll_changed, | |
63ebb9fa | 252 | .atomic_check = drm_atomic_helper_check, |
893b6cad | 253 | .atomic_commit = drm_atomic_helper_commit, |
2048e328 MY |
254 | }; |
255 | ||
256 | struct drm_framebuffer * | |
257 | rockchip_drm_framebuffer_init(struct drm_device *dev, | |
1eb83451 | 258 | const struct drm_mode_fb_cmd2 *mode_cmd, |
2048e328 MY |
259 | struct drm_gem_object *obj) |
260 | { | |
261 | struct rockchip_drm_fb *rockchip_fb; | |
262 | ||
263 | rockchip_fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); | |
264 | if (IS_ERR(rockchip_fb)) | |
265 | return NULL; | |
266 | ||
267 | return &rockchip_fb->fb; | |
268 | } | |
269 | ||
270 | void rockchip_drm_mode_config_init(struct drm_device *dev) | |
271 | { | |
272 | dev->mode_config.min_width = 0; | |
273 | dev->mode_config.min_height = 0; | |
274 | ||
275 | /* | |
276 | * set max width and height as default value(4096x4096). | |
277 | * this value would be used to check framebuffer size limitation | |
278 | * at drm_mode_addfb(). | |
279 | */ | |
280 | dev->mode_config.max_width = 4096; | |
281 | dev->mode_config.max_height = 4096; | |
282 | ||
283 | dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; | |
893b6cad | 284 | dev->mode_config.helper_private = &rockchip_mode_config_helpers; |
2048e328 | 285 | } |