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1/*
2 * Copyright (C) 2011 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 */
11
12#include <drm/drmP.h>
13
14#include <drm/drm_atomic.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_plane_helper.h>
17#include <drm/exynos_drm.h>
18#include "exynos_drm_drv.h"
19#include "exynos_drm_crtc.h"
20#include "exynos_drm_fb.h"
21#include "exynos_drm_gem.h"
22#include "exynos_drm_plane.h"
23
24/*
25 * This function is to get X or Y size shown via screen. This needs length and
26 * start position of CRTC.
27 *
28 * <--- length --->
29 * CRTC ----------------
30 * ^ start ^ end
31 *
32 * There are six cases from a to f.
33 *
34 * <----- SCREEN ----->
35 * 0 last
36 * ----------|------------------|----------
37 * CRTCs
38 * a -------
39 * b -------
40 * c --------------------------
41 * d --------
42 * e -------
43 * f -------
44 */
45static int exynos_plane_get_size(int start, unsigned length, unsigned last)
46{
47 int end = start + length;
48 int size = 0;
49
50 if (start <= 0) {
51 if (end > 0)
52 size = min_t(unsigned, end, last);
53 } else if (start <= last) {
54 size = min_t(unsigned, last - start, length);
55 }
56
57 return size;
58}
59
60static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
61{
62 struct drm_plane_state *state = &exynos_state->base;
63 struct drm_crtc *crtc = state->crtc;
64 struct drm_crtc_state *crtc_state =
65 drm_atomic_get_existing_crtc_state(state->state, crtc);
66 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
67 int crtc_x, crtc_y;
68 unsigned int crtc_w, crtc_h;
69 unsigned int src_x, src_y;
70 unsigned int src_w, src_h;
71 unsigned int actual_w;
72 unsigned int actual_h;
73
74 /*
75 * The original src/dest coordinates are stored in exynos_state->base,
76 * but we want to keep another copy internal to our driver that we can
77 * clip/modify ourselves.
78 */
79
80 crtc_x = state->crtc_x;
81 crtc_y = state->crtc_y;
82 crtc_w = state->crtc_w;
83 crtc_h = state->crtc_h;
84
85 src_x = state->src_x >> 16;
86 src_y = state->src_y >> 16;
87 src_w = state->src_w >> 16;
88 src_h = state->src_h >> 16;
89
90 /* set ratio */
91 exynos_state->h_ratio = (src_w << 16) / crtc_w;
92 exynos_state->v_ratio = (src_h << 16) / crtc_h;
93
94 /* clip to visible area */
95 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
96 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
97
98 if (crtc_x < 0) {
99 if (actual_w)
100 src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;
101 crtc_x = 0;
102 }
103
104 if (crtc_y < 0) {
105 if (actual_h)
106 src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;
107 crtc_y = 0;
108 }
109
110 /* set drm framebuffer data. */
111 exynos_state->src.x = src_x;
112 exynos_state->src.y = src_y;
113 exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;
114 exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;
115
116 /* set plane range to be displayed. */
117 exynos_state->crtc.x = crtc_x;
118 exynos_state->crtc.y = crtc_y;
119 exynos_state->crtc.w = actual_w;
120 exynos_state->crtc.h = actual_h;
121
122 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
123 exynos_state->crtc.x, exynos_state->crtc.y,
124 exynos_state->crtc.w, exynos_state->crtc.h);
125}
126
127static void exynos_drm_plane_reset(struct drm_plane *plane)
128{
129 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
130 struct exynos_drm_plane_state *exynos_state;
131
132 if (plane->state) {
133 exynos_state = to_exynos_plane_state(plane->state);
134 if (exynos_state->base.fb)
135 drm_framebuffer_unreference(exynos_state->base.fb);
136 kfree(exynos_state);
137 plane->state = NULL;
138 }
139
140 exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
141 if (exynos_state) {
142 exynos_state->zpos = exynos_plane->config->zpos;
143 plane->state = &exynos_state->base;
144 plane->state->plane = plane;
145 }
146}
147
148static struct drm_plane_state *
149exynos_drm_plane_duplicate_state(struct drm_plane *plane)
150{
151 struct exynos_drm_plane_state *exynos_state;
152 struct exynos_drm_plane_state *copy;
153
154 exynos_state = to_exynos_plane_state(plane->state);
155 copy = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
156 if (!copy)
157 return NULL;
158
159 __drm_atomic_helper_plane_duplicate_state(plane, ©->base);
160 copy->zpos = exynos_state->zpos;
161 return ©->base;
162}
163
164static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
165 struct drm_plane_state *old_state)
166{
167 struct exynos_drm_plane_state *old_exynos_state =
168 to_exynos_plane_state(old_state);
169 __drm_atomic_helper_plane_destroy_state(plane, old_state);
170 kfree(old_exynos_state);
171}
172
173static int exynos_drm_plane_atomic_set_property(struct drm_plane *plane,
174 struct drm_plane_state *state,
175 struct drm_property *property,
176 uint64_t val)
177{
178 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
179 struct exynos_drm_plane_state *exynos_state =
180 to_exynos_plane_state(state);
181 struct exynos_drm_private *dev_priv = plane->dev->dev_private;
182 const struct exynos_drm_plane_config *config = exynos_plane->config;
183
184 if (property == dev_priv->plane_zpos_property &&
185 (config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS))
186 exynos_state->zpos = val;
187 else
188 return -EINVAL;
189
190 return 0;
191}
192
193static int exynos_drm_plane_atomic_get_property(struct drm_plane *plane,
194 const struct drm_plane_state *state,
195 struct drm_property *property,
196 uint64_t *val)
197{
198 const struct exynos_drm_plane_state *exynos_state =
199 container_of(state, const struct exynos_drm_plane_state, base);
200 struct exynos_drm_private *dev_priv = plane->dev->dev_private;
201
202 if (property == dev_priv->plane_zpos_property)
203 *val = exynos_state->zpos;
204 else
205 return -EINVAL;
206
207 return 0;
208}
209
210static struct drm_plane_funcs exynos_plane_funcs = {
211 .update_plane = drm_atomic_helper_update_plane,
212 .disable_plane = drm_atomic_helper_disable_plane,
213 .destroy = drm_plane_cleanup,
214 .set_property = drm_atomic_helper_plane_set_property,
215 .reset = exynos_drm_plane_reset,
216 .atomic_duplicate_state = exynos_drm_plane_duplicate_state,
217 .atomic_destroy_state = exynos_drm_plane_destroy_state,
218 .atomic_set_property = exynos_drm_plane_atomic_set_property,
219 .atomic_get_property = exynos_drm_plane_atomic_get_property,
220};
221
222static int
223exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
224 struct exynos_drm_plane_state *state)
225{
226 bool width_ok = false, height_ok = false;
227
228 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
229 return 0;
230
231 if (state->src.w == state->crtc.w)
232 width_ok = true;
233
234 if (state->src.h == state->crtc.h)
235 height_ok = true;
236
237 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
238 state->h_ratio == (1 << 15))
239 width_ok = true;
240
241 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
242 state->v_ratio == (1 << 15))
243 height_ok = true;
244
245 if (width_ok & height_ok)
246 return 0;
247
248 DRM_DEBUG_KMS("scaling mode is not supported");
249 return -ENOTSUPP;
250}
251
252static int exynos_plane_atomic_check(struct drm_plane *plane,
253 struct drm_plane_state *state)
254{
255 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
256 struct exynos_drm_plane_state *exynos_state =
257 to_exynos_plane_state(state);
258 int ret = 0;
259
260 if (!state->crtc || !state->fb)
261 return 0;
262
263 /* translate state into exynos_state */
264 exynos_plane_mode_set(exynos_state);
265
266 ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);
267 return ret;
268}
269
270static void exynos_plane_atomic_update(struct drm_plane *plane,
271 struct drm_plane_state *old_state)
272{
273 struct drm_plane_state *state = plane->state;
274 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
275 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
276
277 if (!state->crtc)
278 return;
279
280 plane->crtc = state->crtc;
281 exynos_plane->pending_fb = state->fb;
282
283 if (exynos_crtc->ops->update_plane)
284 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
285}
286
287static void exynos_plane_atomic_disable(struct drm_plane *plane,
288 struct drm_plane_state *old_state)
289{
290 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
291 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
292
293 if (!old_state->crtc)
294 return;
295
296 if (exynos_crtc->ops->disable_plane)
297 exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane);
298}
299
300static const struct drm_plane_helper_funcs plane_helper_funcs = {
301 .atomic_check = exynos_plane_atomic_check,
302 .atomic_update = exynos_plane_atomic_update,
303 .atomic_disable = exynos_plane_atomic_disable,
304};
305
306static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
307 unsigned int zpos)
308{
309 struct drm_device *dev = plane->dev;
310 struct exynos_drm_private *dev_priv = dev->dev_private;
311 struct drm_property *prop;
312
313 prop = dev_priv->plane_zpos_property;
314 if (!prop) {
315 prop = drm_property_create_range(dev, 0, "zpos",
316 0, MAX_PLANE - 1);
317 if (!prop)
318 return;
319
320 dev_priv->plane_zpos_property = prop;
321 }
322
323 drm_object_attach_property(&plane->base, prop, zpos);
324}
325
326int exynos_plane_init(struct drm_device *dev,
327 struct exynos_drm_plane *exynos_plane,
328 unsigned int index, unsigned long possible_crtcs,
329 const struct exynos_drm_plane_config *config)
330{
331 int err;
332
333 err = drm_universal_plane_init(dev, &exynos_plane->base,
334 possible_crtcs,
335 &exynos_plane_funcs,
336 config->pixel_formats,
337 config->num_pixel_formats,
338 config->type, NULL);
339 if (err) {
340 DRM_ERROR("failed to initialize plane\n");
341 return err;
342 }
343
344 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
345
346 exynos_plane->index = index;
347 exynos_plane->config = config;
348
349 exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos);
350
351 return 0;
352}
1/*
2 * Copyright (C) 2011 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 */
11
12#include <drm/drmP.h>
13
14#include <drm/drm_atomic.h>
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_plane_helper.h>
17#include <drm/exynos_drm.h>
18#include "exynos_drm_drv.h"
19#include "exynos_drm_crtc.h"
20#include "exynos_drm_fb.h"
21#include "exynos_drm_gem.h"
22#include "exynos_drm_plane.h"
23
24/*
25 * This function is to get X or Y size shown via screen. This needs length and
26 * start position of CRTC.
27 *
28 * <--- length --->
29 * CRTC ----------------
30 * ^ start ^ end
31 *
32 * There are six cases from a to f.
33 *
34 * <----- SCREEN ----->
35 * 0 last
36 * ----------|------------------|----------
37 * CRTCs
38 * a -------
39 * b -------
40 * c --------------------------
41 * d --------
42 * e -------
43 * f -------
44 */
45static int exynos_plane_get_size(int start, unsigned length, unsigned last)
46{
47 int end = start + length;
48 int size = 0;
49
50 if (start <= 0) {
51 if (end > 0)
52 size = min_t(unsigned, end, last);
53 } else if (start <= last) {
54 size = min_t(unsigned, last - start, length);
55 }
56
57 return size;
58}
59
60static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
61{
62 struct drm_plane_state *state = &exynos_state->base;
63 struct drm_crtc *crtc = state->crtc;
64 struct drm_crtc_state *crtc_state =
65 drm_atomic_get_existing_crtc_state(state->state, crtc);
66 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
67 int crtc_x, crtc_y;
68 unsigned int crtc_w, crtc_h;
69 unsigned int src_x, src_y;
70 unsigned int src_w, src_h;
71 unsigned int actual_w;
72 unsigned int actual_h;
73
74 /*
75 * The original src/dest coordinates are stored in exynos_state->base,
76 * but we want to keep another copy internal to our driver that we can
77 * clip/modify ourselves.
78 */
79
80 crtc_x = state->crtc_x;
81 crtc_y = state->crtc_y;
82 crtc_w = state->crtc_w;
83 crtc_h = state->crtc_h;
84
85 src_x = state->src_x >> 16;
86 src_y = state->src_y >> 16;
87 src_w = state->src_w >> 16;
88 src_h = state->src_h >> 16;
89
90 /* set ratio */
91 exynos_state->h_ratio = (src_w << 16) / crtc_w;
92 exynos_state->v_ratio = (src_h << 16) / crtc_h;
93
94 /* clip to visible area */
95 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
96 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
97
98 if (crtc_x < 0) {
99 if (actual_w)
100 src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;
101 crtc_x = 0;
102 }
103
104 if (crtc_y < 0) {
105 if (actual_h)
106 src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;
107 crtc_y = 0;
108 }
109
110 /* set drm framebuffer data. */
111 exynos_state->src.x = src_x;
112 exynos_state->src.y = src_y;
113 exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;
114 exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;
115
116 /* set plane range to be displayed. */
117 exynos_state->crtc.x = crtc_x;
118 exynos_state->crtc.y = crtc_y;
119 exynos_state->crtc.w = actual_w;
120 exynos_state->crtc.h = actual_h;
121
122 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
123 exynos_state->crtc.x, exynos_state->crtc.y,
124 exynos_state->crtc.w, exynos_state->crtc.h);
125}
126
127static void exynos_drm_plane_reset(struct drm_plane *plane)
128{
129 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
130 struct exynos_drm_plane_state *exynos_state;
131
132 if (plane->state) {
133 exynos_state = to_exynos_plane_state(plane->state);
134 if (exynos_state->base.fb)
135 drm_framebuffer_unreference(exynos_state->base.fb);
136 kfree(exynos_state);
137 plane->state = NULL;
138 }
139
140 exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
141 if (exynos_state) {
142 plane->state = &exynos_state->base;
143 plane->state->plane = plane;
144 plane->state->zpos = exynos_plane->config->zpos;
145 }
146}
147
148static struct drm_plane_state *
149exynos_drm_plane_duplicate_state(struct drm_plane *plane)
150{
151 struct exynos_drm_plane_state *exynos_state;
152 struct exynos_drm_plane_state *copy;
153
154 exynos_state = to_exynos_plane_state(plane->state);
155 copy = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
156 if (!copy)
157 return NULL;
158
159 __drm_atomic_helper_plane_duplicate_state(plane, ©->base);
160 return ©->base;
161}
162
163static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
164 struct drm_plane_state *old_state)
165{
166 struct exynos_drm_plane_state *old_exynos_state =
167 to_exynos_plane_state(old_state);
168 __drm_atomic_helper_plane_destroy_state(old_state);
169 kfree(old_exynos_state);
170}
171
172static struct drm_plane_funcs exynos_plane_funcs = {
173 .update_plane = drm_atomic_helper_update_plane,
174 .disable_plane = drm_atomic_helper_disable_plane,
175 .destroy = drm_plane_cleanup,
176 .reset = exynos_drm_plane_reset,
177 .atomic_duplicate_state = exynos_drm_plane_duplicate_state,
178 .atomic_destroy_state = exynos_drm_plane_destroy_state,
179};
180
181static int
182exynos_drm_plane_check_format(const struct exynos_drm_plane_config *config,
183 struct exynos_drm_plane_state *state)
184{
185 struct drm_framebuffer *fb = state->base.fb;
186
187 switch (fb->modifier) {
188 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
189 if (!(config->capabilities & EXYNOS_DRM_PLANE_CAP_TILE))
190 return -ENOTSUPP;
191 break;
192
193 case DRM_FORMAT_MOD_LINEAR:
194 break;
195
196 default:
197 DRM_ERROR("unsupported pixel format modifier");
198 return -ENOTSUPP;
199 }
200
201 return 0;
202}
203
204static int
205exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
206 struct exynos_drm_plane_state *state)
207{
208 bool width_ok = false, height_ok = false;
209
210 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
211 return 0;
212
213 if (state->src.w == state->crtc.w)
214 width_ok = true;
215
216 if (state->src.h == state->crtc.h)
217 height_ok = true;
218
219 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
220 state->h_ratio == (1 << 15))
221 width_ok = true;
222
223 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
224 state->v_ratio == (1 << 15))
225 height_ok = true;
226
227 if (width_ok && height_ok)
228 return 0;
229
230 DRM_DEBUG_KMS("scaling mode is not supported");
231 return -ENOTSUPP;
232}
233
234static int exynos_plane_atomic_check(struct drm_plane *plane,
235 struct drm_plane_state *state)
236{
237 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
238 struct exynos_drm_plane_state *exynos_state =
239 to_exynos_plane_state(state);
240 int ret = 0;
241
242 if (!state->crtc || !state->fb)
243 return 0;
244
245 /* translate state into exynos_state */
246 exynos_plane_mode_set(exynos_state);
247
248 ret = exynos_drm_plane_check_format(exynos_plane->config, exynos_state);
249 if (ret)
250 return ret;
251
252 ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);
253 return ret;
254}
255
256static void exynos_plane_atomic_update(struct drm_plane *plane,
257 struct drm_plane_state *old_state)
258{
259 struct drm_plane_state *state = plane->state;
260 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
261 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
262
263 if (!state->crtc)
264 return;
265
266 plane->crtc = state->crtc;
267
268 if (exynos_crtc->ops->update_plane)
269 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
270}
271
272static void exynos_plane_atomic_disable(struct drm_plane *plane,
273 struct drm_plane_state *old_state)
274{
275 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
276 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
277
278 if (!old_state->crtc)
279 return;
280
281 if (exynos_crtc->ops->disable_plane)
282 exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane);
283}
284
285static const struct drm_plane_helper_funcs plane_helper_funcs = {
286 .atomic_check = exynos_plane_atomic_check,
287 .atomic_update = exynos_plane_atomic_update,
288 .atomic_disable = exynos_plane_atomic_disable,
289};
290
291static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
292 bool immutable)
293{
294 /* FIXME */
295 if (immutable)
296 drm_plane_create_zpos_immutable_property(plane, 0);
297 else
298 drm_plane_create_zpos_property(plane, 0, 0, MAX_PLANE - 1);
299}
300
301int exynos_plane_init(struct drm_device *dev,
302 struct exynos_drm_plane *exynos_plane, unsigned int index,
303 const struct exynos_drm_plane_config *config)
304{
305 int err;
306
307 err = drm_universal_plane_init(dev, &exynos_plane->base,
308 1 << dev->mode_config.num_crtc,
309 &exynos_plane_funcs,
310 config->pixel_formats,
311 config->num_pixel_formats,
312 NULL, config->type, NULL);
313 if (err) {
314 DRM_ERROR("failed to initialize plane\n");
315 return err;
316 }
317
318 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
319
320 exynos_plane->index = index;
321 exynos_plane->config = config;
322
323 exynos_plane_attach_zpos_property(&exynos_plane->base,
324 !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
325
326 return 0;
327}