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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2011 Samsung Electronics Co.Ltd
4 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
5 */
6
7
8#include <drm/drm_atomic.h>
9#include <drm/drm_atomic_helper.h>
10#include <drm/drm_plane_helper.h>
11#include <drm/exynos_drm.h>
12
13#include "exynos_drm_crtc.h"
14#include "exynos_drm_drv.h"
15#include "exynos_drm_fb.h"
16#include "exynos_drm_gem.h"
17#include "exynos_drm_plane.h"
18
19/*
20 * This function is to get X or Y size shown via screen. This needs length and
21 * start position of CRTC.
22 *
23 * <--- length --->
24 * CRTC ----------------
25 * ^ start ^ end
26 *
27 * There are six cases from a to f.
28 *
29 * <----- SCREEN ----->
30 * 0 last
31 * ----------|------------------|----------
32 * CRTCs
33 * a -------
34 * b -------
35 * c --------------------------
36 * d --------
37 * e -------
38 * f -------
39 */
40static int exynos_plane_get_size(int start, unsigned length, unsigned last)
41{
42 int end = start + length;
43 int size = 0;
44
45 if (start <= 0) {
46 if (end > 0)
47 size = min_t(unsigned, end, last);
48 } else if (start <= last) {
49 size = min_t(unsigned, last - start, length);
50 }
51
52 return size;
53}
54
55static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
56{
57 struct drm_plane_state *state = &exynos_state->base;
58 struct drm_crtc *crtc = state->crtc;
59 struct drm_crtc_state *crtc_state =
60 drm_atomic_get_existing_crtc_state(state->state, crtc);
61 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
62 int crtc_x, crtc_y;
63 unsigned int crtc_w, crtc_h;
64 unsigned int src_x, src_y;
65 unsigned int src_w, src_h;
66 unsigned int actual_w;
67 unsigned int actual_h;
68
69 /*
70 * The original src/dest coordinates are stored in exynos_state->base,
71 * but we want to keep another copy internal to our driver that we can
72 * clip/modify ourselves.
73 */
74
75 crtc_x = state->crtc_x;
76 crtc_y = state->crtc_y;
77 crtc_w = state->crtc_w;
78 crtc_h = state->crtc_h;
79
80 src_x = state->src_x >> 16;
81 src_y = state->src_y >> 16;
82 src_w = state->src_w >> 16;
83 src_h = state->src_h >> 16;
84
85 /* set ratio */
86 exynos_state->h_ratio = (src_w << 16) / crtc_w;
87 exynos_state->v_ratio = (src_h << 16) / crtc_h;
88
89 /* clip to visible area */
90 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
91 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
92
93 if (crtc_x < 0) {
94 if (actual_w)
95 src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;
96 crtc_x = 0;
97 }
98
99 if (crtc_y < 0) {
100 if (actual_h)
101 src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;
102 crtc_y = 0;
103 }
104
105 /* set drm framebuffer data. */
106 exynos_state->src.x = src_x;
107 exynos_state->src.y = src_y;
108 exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;
109 exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;
110
111 /* set plane range to be displayed. */
112 exynos_state->crtc.x = crtc_x;
113 exynos_state->crtc.y = crtc_y;
114 exynos_state->crtc.w = actual_w;
115 exynos_state->crtc.h = actual_h;
116
117 DRM_DEV_DEBUG_KMS(crtc->dev->dev,
118 "plane : offset_x/y(%d,%d), width/height(%d,%d)",
119 exynos_state->crtc.x, exynos_state->crtc.y,
120 exynos_state->crtc.w, exynos_state->crtc.h);
121}
122
123static void exynos_drm_plane_reset(struct drm_plane *plane)
124{
125 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
126 struct exynos_drm_plane_state *exynos_state;
127
128 if (plane->state) {
129 exynos_state = to_exynos_plane_state(plane->state);
130 __drm_atomic_helper_plane_destroy_state(plane->state);
131 kfree(exynos_state);
132 plane->state = NULL;
133 }
134
135 exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
136 if (exynos_state) {
137 __drm_atomic_helper_plane_reset(plane, &exynos_state->base);
138 plane->state->zpos = exynos_plane->config->zpos;
139 }
140}
141
142static struct drm_plane_state *
143exynos_drm_plane_duplicate_state(struct drm_plane *plane)
144{
145 struct exynos_drm_plane_state *exynos_state;
146 struct exynos_drm_plane_state *copy;
147
148 exynos_state = to_exynos_plane_state(plane->state);
149 copy = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
150 if (!copy)
151 return NULL;
152
153 __drm_atomic_helper_plane_duplicate_state(plane, ©->base);
154 return ©->base;
155}
156
157static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
158 struct drm_plane_state *old_state)
159{
160 struct exynos_drm_plane_state *old_exynos_state =
161 to_exynos_plane_state(old_state);
162 __drm_atomic_helper_plane_destroy_state(old_state);
163 kfree(old_exynos_state);
164}
165
166static struct drm_plane_funcs exynos_plane_funcs = {
167 .update_plane = drm_atomic_helper_update_plane,
168 .disable_plane = drm_atomic_helper_disable_plane,
169 .destroy = drm_plane_cleanup,
170 .reset = exynos_drm_plane_reset,
171 .atomic_duplicate_state = exynos_drm_plane_duplicate_state,
172 .atomic_destroy_state = exynos_drm_plane_destroy_state,
173};
174
175static int
176exynos_drm_plane_check_format(const struct exynos_drm_plane_config *config,
177 struct exynos_drm_plane_state *state)
178{
179 struct drm_framebuffer *fb = state->base.fb;
180 struct drm_device *dev = fb->dev;
181
182 switch (fb->modifier) {
183 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
184 if (!(config->capabilities & EXYNOS_DRM_PLANE_CAP_TILE))
185 return -ENOTSUPP;
186 break;
187
188 case DRM_FORMAT_MOD_LINEAR:
189 break;
190
191 default:
192 DRM_DEV_ERROR(dev->dev, "unsupported pixel format modifier");
193 return -ENOTSUPP;
194 }
195
196 return 0;
197}
198
199static int
200exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
201 struct exynos_drm_plane_state *state)
202{
203 struct drm_crtc *crtc = state->base.crtc;
204 bool width_ok = false, height_ok = false;
205
206 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
207 return 0;
208
209 if (state->src.w == state->crtc.w)
210 width_ok = true;
211
212 if (state->src.h == state->crtc.h)
213 height_ok = true;
214
215 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
216 state->h_ratio == (1 << 15))
217 width_ok = true;
218
219 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
220 state->v_ratio == (1 << 15))
221 height_ok = true;
222
223 if (width_ok && height_ok)
224 return 0;
225
226 DRM_DEV_DEBUG_KMS(crtc->dev->dev, "scaling mode is not supported");
227 return -ENOTSUPP;
228}
229
230static int exynos_plane_atomic_check(struct drm_plane *plane,
231 struct drm_plane_state *state)
232{
233 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
234 struct exynos_drm_plane_state *exynos_state =
235 to_exynos_plane_state(state);
236 int ret = 0;
237
238 if (!state->crtc || !state->fb)
239 return 0;
240
241 /* translate state into exynos_state */
242 exynos_plane_mode_set(exynos_state);
243
244 ret = exynos_drm_plane_check_format(exynos_plane->config, exynos_state);
245 if (ret)
246 return ret;
247
248 ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);
249 return ret;
250}
251
252static void exynos_plane_atomic_update(struct drm_plane *plane,
253 struct drm_plane_state *old_state)
254{
255 struct drm_plane_state *state = plane->state;
256 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
257 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
258
259 if (!state->crtc)
260 return;
261
262 if (exynos_crtc->ops->update_plane)
263 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
264}
265
266static void exynos_plane_atomic_disable(struct drm_plane *plane,
267 struct drm_plane_state *old_state)
268{
269 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
270 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
271
272 if (!old_state->crtc)
273 return;
274
275 if (exynos_crtc->ops->disable_plane)
276 exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane);
277}
278
279static const struct drm_plane_helper_funcs plane_helper_funcs = {
280 .atomic_check = exynos_plane_atomic_check,
281 .atomic_update = exynos_plane_atomic_update,
282 .atomic_disable = exynos_plane_atomic_disable,
283};
284
285static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
286 int zpos, bool immutable)
287{
288 if (immutable)
289 drm_plane_create_zpos_immutable_property(plane, zpos);
290 else
291 drm_plane_create_zpos_property(plane, zpos, 0, MAX_PLANE - 1);
292}
293
294int exynos_plane_init(struct drm_device *dev,
295 struct exynos_drm_plane *exynos_plane, unsigned int index,
296 const struct exynos_drm_plane_config *config)
297{
298 int err;
299 unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
300 BIT(DRM_MODE_BLEND_PREMULTI) |
301 BIT(DRM_MODE_BLEND_COVERAGE);
302 struct drm_plane *plane = &exynos_plane->base;
303
304 err = drm_universal_plane_init(dev, &exynos_plane->base,
305 1 << dev->mode_config.num_crtc,
306 &exynos_plane_funcs,
307 config->pixel_formats,
308 config->num_pixel_formats,
309 NULL, config->type, NULL);
310 if (err) {
311 DRM_DEV_ERROR(dev->dev, "failed to initialize plane\n");
312 return err;
313 }
314
315 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
316
317 exynos_plane->index = index;
318 exynos_plane->config = config;
319
320 exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos,
321 !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
322
323 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_PIX_BLEND)
324 drm_plane_create_blend_mode_property(plane, supported_modes);
325
326 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_WIN_BLEND)
327 drm_plane_create_alpha_property(plane);
328
329 return 0;
330}
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 .set_property = drm_atomic_helper_plane_set_property,
177 .reset = exynos_drm_plane_reset,
178 .atomic_duplicate_state = exynos_drm_plane_duplicate_state,
179 .atomic_destroy_state = exynos_drm_plane_destroy_state,
180};
181
182static int
183exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
184 struct exynos_drm_plane_state *state)
185{
186 bool width_ok = false, height_ok = false;
187
188 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
189 return 0;
190
191 if (state->src.w == state->crtc.w)
192 width_ok = true;
193
194 if (state->src.h == state->crtc.h)
195 height_ok = true;
196
197 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
198 state->h_ratio == (1 << 15))
199 width_ok = true;
200
201 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
202 state->v_ratio == (1 << 15))
203 height_ok = true;
204
205 if (width_ok && height_ok)
206 return 0;
207
208 DRM_DEBUG_KMS("scaling mode is not supported");
209 return -ENOTSUPP;
210}
211
212static int exynos_plane_atomic_check(struct drm_plane *plane,
213 struct drm_plane_state *state)
214{
215 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
216 struct exynos_drm_plane_state *exynos_state =
217 to_exynos_plane_state(state);
218 int ret = 0;
219
220 if (!state->crtc || !state->fb)
221 return 0;
222
223 /* translate state into exynos_state */
224 exynos_plane_mode_set(exynos_state);
225
226 ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);
227 return ret;
228}
229
230static void exynos_plane_atomic_update(struct drm_plane *plane,
231 struct drm_plane_state *old_state)
232{
233 struct drm_plane_state *state = plane->state;
234 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
235 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
236
237 if (!state->crtc)
238 return;
239
240 plane->crtc = state->crtc;
241
242 if (exynos_crtc->ops->update_plane)
243 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
244}
245
246static void exynos_plane_atomic_disable(struct drm_plane *plane,
247 struct drm_plane_state *old_state)
248{
249 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
250 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
251
252 if (!old_state->crtc)
253 return;
254
255 if (exynos_crtc->ops->disable_plane)
256 exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane);
257}
258
259static const struct drm_plane_helper_funcs plane_helper_funcs = {
260 .atomic_check = exynos_plane_atomic_check,
261 .atomic_update = exynos_plane_atomic_update,
262 .atomic_disable = exynos_plane_atomic_disable,
263};
264
265static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
266 bool immutable)
267{
268 /* FIXME */
269 if (immutable)
270 drm_plane_create_zpos_immutable_property(plane, 0);
271 else
272 drm_plane_create_zpos_property(plane, 0, 0, MAX_PLANE - 1);
273}
274
275int exynos_plane_init(struct drm_device *dev,
276 struct exynos_drm_plane *exynos_plane,
277 unsigned int index, unsigned long possible_crtcs,
278 const struct exynos_drm_plane_config *config)
279{
280 int err;
281
282 err = drm_universal_plane_init(dev, &exynos_plane->base,
283 possible_crtcs,
284 &exynos_plane_funcs,
285 config->pixel_formats,
286 config->num_pixel_formats,
287 config->type, NULL);
288 if (err) {
289 DRM_ERROR("failed to initialize plane\n");
290 return err;
291 }
292
293 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
294
295 exynos_plane->index = index;
296 exynos_plane->config = config;
297
298 exynos_plane_attach_zpos_property(&exynos_plane->base,
299 !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
300
301 return 0;
302}