1
2
3
4
5
6
7
8
9#include <linux/clk-provider.h>
10#include <linux/ioport.h>
11#include <linux/of_address.h>
12#include <linux/of_graph.h>
13#include <linux/of_irq.h>
14#include <linux/regmap.h>
15
16#include <video/videomode.h>
17
18#include <drm/drm_atomic.h>
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_crtc.h>
21#include <drm/drm_modes.h>
22#include <drm/drm_print.h>
23#include <drm/drm_probe_helper.h>
24#include <drm/drm_vblank.h>
25
26#include "sun4i_backend.h"
27#include "sun4i_crtc.h"
28#include "sun4i_drv.h"
29#include "sunxi_engine.h"
30#include "sun4i_tcon.h"
31
32
33
34
35
36
37static struct drm_encoder *sun4i_crtc_get_encoder(struct drm_crtc *crtc)
38{
39 struct drm_encoder *encoder;
40
41 drm_for_each_encoder(encoder, crtc->dev)
42 if (encoder->crtc == crtc)
43 return encoder;
44
45 return NULL;
46}
47
48static int sun4i_crtc_atomic_check(struct drm_crtc *crtc,
49 struct drm_atomic_state *state)
50{
51 struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
52 crtc);
53 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
54 struct sunxi_engine *engine = scrtc->engine;
55 int ret = 0;
56
57 if (engine && engine->ops && engine->ops->atomic_check)
58 ret = engine->ops->atomic_check(engine, crtc_state);
59
60 return ret;
61}
62
63static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc,
64 struct drm_atomic_state *state)
65{
66 struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state,
67 crtc);
68 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
69 struct drm_device *dev = crtc->dev;
70 struct sunxi_engine *engine = scrtc->engine;
71 unsigned long flags;
72
73 if (crtc->state->event) {
74 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
75
76 spin_lock_irqsave(&dev->event_lock, flags);
77 scrtc->event = crtc->state->event;
78 spin_unlock_irqrestore(&dev->event_lock, flags);
79 crtc->state->event = NULL;
80 }
81
82 if (engine->ops->atomic_begin)
83 engine->ops->atomic_begin(engine, old_state);
84}
85
86static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc,
87 struct drm_atomic_state *state)
88{
89 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
90 struct drm_pending_vblank_event *event = crtc->state->event;
91
92 DRM_DEBUG_DRIVER("Committing plane changes\n");
93
94 sunxi_engine_commit(scrtc->engine);
95
96 if (event) {
97 crtc->state->event = NULL;
98
99 spin_lock_irq(&crtc->dev->event_lock);
100 if (drm_crtc_vblank_get(crtc) == 0)
101 drm_crtc_arm_vblank_event(crtc, event);
102 else
103 drm_crtc_send_vblank_event(crtc, event);
104 spin_unlock_irq(&crtc->dev->event_lock);
105 }
106}
107
108static void sun4i_crtc_atomic_disable(struct drm_crtc *crtc,
109 struct drm_atomic_state *state)
110{
111 struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
112 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
113
114 DRM_DEBUG_DRIVER("Disabling the CRTC\n");
115
116 drm_crtc_vblank_off(crtc);
117
118 sun4i_tcon_set_status(scrtc->tcon, encoder, false);
119
120 if (crtc->state->event && !crtc->state->active) {
121 spin_lock_irq(&crtc->dev->event_lock);
122 drm_crtc_send_vblank_event(crtc, crtc->state->event);
123 spin_unlock_irq(&crtc->dev->event_lock);
124
125 crtc->state->event = NULL;
126 }
127}
128
129static void sun4i_crtc_atomic_enable(struct drm_crtc *crtc,
130 struct drm_atomic_state *state)
131{
132 struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
133 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
134
135 DRM_DEBUG_DRIVER("Enabling the CRTC\n");
136
137 sun4i_tcon_set_status(scrtc->tcon, encoder, true);
138
139 drm_crtc_vblank_on(crtc);
140}
141
142static void sun4i_crtc_mode_set_nofb(struct drm_crtc *crtc)
143{
144 struct drm_display_mode *mode = &crtc->state->adjusted_mode;
145 struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
146 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
147
148 sun4i_tcon_mode_set(scrtc->tcon, encoder, mode);
149}
150
151static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
152 .atomic_check = sun4i_crtc_atomic_check,
153 .atomic_begin = sun4i_crtc_atomic_begin,
154 .atomic_flush = sun4i_crtc_atomic_flush,
155 .atomic_enable = sun4i_crtc_atomic_enable,
156 .atomic_disable = sun4i_crtc_atomic_disable,
157 .mode_set_nofb = sun4i_crtc_mode_set_nofb,
158};
159
160static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc)
161{
162 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
163
164 DRM_DEBUG_DRIVER("Enabling VBLANK on crtc %p\n", crtc);
165
166 sun4i_tcon_enable_vblank(scrtc->tcon, true);
167
168 return 0;
169}
170
171static void sun4i_crtc_disable_vblank(struct drm_crtc *crtc)
172{
173 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
174
175 DRM_DEBUG_DRIVER("Disabling VBLANK on crtc %p\n", crtc);
176
177 sun4i_tcon_enable_vblank(scrtc->tcon, false);
178}
179
180static const struct drm_crtc_funcs sun4i_crtc_funcs = {
181 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
182 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
183 .destroy = drm_crtc_cleanup,
184 .page_flip = drm_atomic_helper_page_flip,
185 .reset = drm_atomic_helper_crtc_reset,
186 .set_config = drm_atomic_helper_set_config,
187 .enable_vblank = sun4i_crtc_enable_vblank,
188 .disable_vblank = sun4i_crtc_disable_vblank,
189};
190
191struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm,
192 struct sunxi_engine *engine,
193 struct sun4i_tcon *tcon)
194{
195 struct sun4i_crtc *scrtc;
196 struct drm_plane **planes;
197 struct drm_plane *primary = NULL, *cursor = NULL;
198 int ret, i;
199
200 scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL);
201 if (!scrtc)
202 return ERR_PTR(-ENOMEM);
203 scrtc->engine = engine;
204 scrtc->tcon = tcon;
205
206
207 planes = sunxi_engine_layers_init(drm, engine);
208 if (IS_ERR(planes)) {
209 dev_err(drm->dev, "Couldn't create the planes\n");
210 return NULL;
211 }
212
213
214 for (i = 0; planes[i]; i++) {
215 struct drm_plane *plane = planes[i];
216
217 switch (plane->type) {
218 case DRM_PLANE_TYPE_PRIMARY:
219 primary = plane;
220 break;
221 case DRM_PLANE_TYPE_CURSOR:
222 cursor = plane;
223 break;
224 default:
225 break;
226 }
227 }
228
229 ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
230 primary,
231 cursor,
232 &sun4i_crtc_funcs,
233 NULL);
234 if (ret) {
235 dev_err(drm->dev, "Couldn't init DRM CRTC\n");
236 return ERR_PTR(ret);
237 }
238
239 drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);
240
241
242 scrtc->crtc.port = of_graph_get_port_by_id(scrtc->tcon->dev->of_node,
243 1);
244
245
246 for (i = 0; planes[i]; i++) {
247 uint32_t possible_crtcs = drm_crtc_mask(&scrtc->crtc);
248 struct drm_plane *plane = planes[i];
249
250 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
251 plane->possible_crtcs = possible_crtcs;
252 }
253
254 return scrtc;
255}
256
