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_blend.h>
11 #include <drm/drm_framebuffer.h>
12 #include <drm/drm_print.h>
13 #include <drm/exynos_drm.h>
14
15 #include "exynos_drm_crtc.h"
16 #include "exynos_drm_drv.h"
17 #include "exynos_drm_fb.h"
18 #include "exynos_drm_gem.h"
19 #include "exynos_drm_plane.h"
20
21 /*
22 * This function is to get X or Y size shown via screen. This needs length and
23 * start position of CRTC.
24 *
25 * <--- length --->
26 * CRTC ----------------
27 * ^ start ^ end
28 *
29 * There are six cases from a to f.
30 *
31 * <----- SCREEN ----->
32 * 0 last
33 * ----------|------------------|----------
34 * CRTCs
35 * a -------
36 * b -------
37 * c --------------------------
38 * d --------
39 * e -------
40 * f -------
41 */
exynos_plane_get_size(int start,unsigned length,unsigned last)42 static int exynos_plane_get_size(int start, unsigned length, unsigned last)
43 {
44 int end = start + length;
45 int size = 0;
46
47 if (start <= 0) {
48 if (end > 0)
49 size = min_t(unsigned, end, last);
50 } else if (start <= last) {
51 size = min_t(unsigned, last - start, length);
52 }
53
54 return size;
55 }
56
exynos_plane_mode_set(struct exynos_drm_plane_state * exynos_state)57 static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
58 {
59 struct drm_plane_state *state = &exynos_state->base;
60 struct drm_crtc *crtc = state->crtc;
61 struct drm_crtc_state *crtc_state =
62 drm_atomic_get_new_crtc_state(state->state, crtc);
63 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
64 int crtc_x, crtc_y;
65 unsigned int crtc_w, crtc_h;
66 unsigned int src_x, src_y;
67 unsigned int src_w, src_h;
68 unsigned int actual_w;
69 unsigned int actual_h;
70
71 /*
72 * The original src/dest coordinates are stored in exynos_state->base,
73 * but we want to keep another copy internal to our driver that we can
74 * clip/modify ourselves.
75 */
76
77 crtc_x = state->crtc_x;
78 crtc_y = state->crtc_y;
79 crtc_w = state->crtc_w;
80 crtc_h = state->crtc_h;
81
82 src_x = state->src_x >> 16;
83 src_y = state->src_y >> 16;
84 src_w = state->src_w >> 16;
85 src_h = state->src_h >> 16;
86
87 /* set ratio */
88 exynos_state->h_ratio = (src_w << 16) / crtc_w;
89 exynos_state->v_ratio = (src_h << 16) / crtc_h;
90
91 /* clip to visible area */
92 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
93 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
94
95 if (crtc_x < 0) {
96 if (actual_w)
97 src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;
98 crtc_x = 0;
99 }
100
101 if (crtc_y < 0) {
102 if (actual_h)
103 src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;
104 crtc_y = 0;
105 }
106
107 /* set drm framebuffer data. */
108 exynos_state->src.x = src_x;
109 exynos_state->src.y = src_y;
110 exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;
111 exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;
112
113 /* set plane range to be displayed. */
114 exynos_state->crtc.x = crtc_x;
115 exynos_state->crtc.y = crtc_y;
116 exynos_state->crtc.w = actual_w;
117 exynos_state->crtc.h = actual_h;
118
119 DRM_DEV_DEBUG_KMS(crtc->dev->dev,
120 "plane : offset_x/y(%d,%d), width/height(%d,%d)",
121 exynos_state->crtc.x, exynos_state->crtc.y,
122 exynos_state->crtc.w, exynos_state->crtc.h);
123 }
124
exynos_drm_plane_reset(struct drm_plane * plane)125 static void exynos_drm_plane_reset(struct drm_plane *plane)
126 {
127 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
128 struct exynos_drm_plane_state *exynos_state;
129
130 if (plane->state) {
131 exynos_state = to_exynos_plane_state(plane->state);
132 __drm_atomic_helper_plane_destroy_state(plane->state);
133 kfree(exynos_state);
134 plane->state = NULL;
135 }
136
137 exynos_state = kzalloc_obj(*exynos_state);
138 if (exynos_state) {
139 __drm_atomic_helper_plane_reset(plane, &exynos_state->base);
140 plane->state->zpos = exynos_plane->config->zpos;
141 }
142 }
143
144 static struct drm_plane_state *
exynos_drm_plane_duplicate_state(struct drm_plane * plane)145 exynos_drm_plane_duplicate_state(struct drm_plane *plane)
146 {
147 struct exynos_drm_plane_state *exynos_state;
148 struct exynos_drm_plane_state *copy;
149
150 exynos_state = to_exynos_plane_state(plane->state);
151 copy = kzalloc_obj(*exynos_state);
152 if (!copy)
153 return NULL;
154
155 __drm_atomic_helper_plane_duplicate_state(plane, ©->base);
156 return ©->base;
157 }
158
exynos_drm_plane_destroy_state(struct drm_plane * plane,struct drm_plane_state * old_state)159 static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
160 struct drm_plane_state *old_state)
161 {
162 struct exynos_drm_plane_state *old_exynos_state =
163 to_exynos_plane_state(old_state);
164 __drm_atomic_helper_plane_destroy_state(old_state);
165 kfree(old_exynos_state);
166 }
167
168 static struct drm_plane_funcs exynos_plane_funcs = {
169 .update_plane = drm_atomic_helper_update_plane,
170 .disable_plane = drm_atomic_helper_disable_plane,
171 .destroy = drm_plane_cleanup,
172 .reset = exynos_drm_plane_reset,
173 .atomic_duplicate_state = exynos_drm_plane_duplicate_state,
174 .atomic_destroy_state = exynos_drm_plane_destroy_state,
175 };
176
177 static int
exynos_drm_plane_check_format(const struct exynos_drm_plane_config * config,struct exynos_drm_plane_state * state)178 exynos_drm_plane_check_format(const struct exynos_drm_plane_config *config,
179 struct exynos_drm_plane_state *state)
180 {
181 struct drm_framebuffer *fb = state->base.fb;
182 struct drm_device *dev = fb->dev;
183
184 switch (fb->modifier) {
185 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
186 if (!(config->capabilities & EXYNOS_DRM_PLANE_CAP_TILE))
187 return -ENOTSUPP;
188 break;
189
190 case DRM_FORMAT_MOD_LINEAR:
191 break;
192
193 default:
194 DRM_DEV_ERROR(dev->dev, "unsupported pixel format modifier");
195 return -ENOTSUPP;
196 }
197
198 return 0;
199 }
200
201 static int
exynos_drm_plane_check_size(const struct exynos_drm_plane_config * config,struct exynos_drm_plane_state * state)202 exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
203 struct exynos_drm_plane_state *state)
204 {
205 struct drm_crtc *crtc = state->base.crtc;
206 bool width_ok = false, height_ok = false;
207
208 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
209 return 0;
210
211 if (state->src.w == state->crtc.w)
212 width_ok = true;
213
214 if (state->src.h == state->crtc.h)
215 height_ok = true;
216
217 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
218 state->h_ratio == (1 << 15))
219 width_ok = true;
220
221 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
222 state->v_ratio == (1 << 15))
223 height_ok = true;
224
225 if (width_ok && height_ok)
226 return 0;
227
228 DRM_DEV_DEBUG_KMS(crtc->dev->dev, "scaling mode is not supported");
229 return -ENOTSUPP;
230 }
231
exynos_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)232 static int exynos_plane_atomic_check(struct drm_plane *plane,
233 struct drm_atomic_state *state)
234 {
235 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
236 plane);
237 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
238 struct exynos_drm_plane_state *exynos_state =
239 to_exynos_plane_state(new_plane_state);
240 int ret = 0;
241
242 if (!new_plane_state->crtc || !new_plane_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
exynos_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)256 static void exynos_plane_atomic_update(struct drm_plane *plane,
257 struct drm_atomic_state *state)
258 {
259 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
260 plane);
261 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(new_state->crtc);
262 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
263
264 if (!new_state->crtc)
265 return;
266
267 if (exynos_crtc->ops->update_plane)
268 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
269 }
270
exynos_plane_atomic_disable(struct drm_plane * plane,struct drm_atomic_state * state)271 static void exynos_plane_atomic_disable(struct drm_plane *plane,
272 struct drm_atomic_state *state)
273 {
274 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
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
285 static 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
exynos_plane_attach_zpos_property(struct drm_plane * plane,int zpos,bool immutable)291 static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
292 int zpos, bool immutable)
293 {
294 if (immutable)
295 drm_plane_create_zpos_immutable_property(plane, zpos);
296 else
297 drm_plane_create_zpos_property(plane, zpos, 0, MAX_PLANE - 1);
298 }
299
exynos_plane_init(struct drm_device * dev,struct exynos_drm_plane * exynos_plane,unsigned int index,const struct exynos_drm_plane_config * config)300 int exynos_plane_init(struct drm_device *dev,
301 struct exynos_drm_plane *exynos_plane, unsigned int index,
302 const struct exynos_drm_plane_config *config)
303 {
304 int err;
305 unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
306 BIT(DRM_MODE_BLEND_PREMULTI) |
307 BIT(DRM_MODE_BLEND_COVERAGE);
308 struct drm_plane *plane = &exynos_plane->base;
309
310 err = drm_universal_plane_init(dev, &exynos_plane->base,
311 1 << dev->mode_config.num_crtc,
312 &exynos_plane_funcs,
313 config->pixel_formats,
314 config->num_pixel_formats,
315 NULL, config->type, NULL);
316 if (err) {
317 DRM_DEV_ERROR(dev->dev, "failed to initialize plane\n");
318 return err;
319 }
320
321 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
322
323 exynos_plane->index = index;
324 exynos_plane->config = config;
325
326 exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos,
327 !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
328
329 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_PIX_BLEND)
330 drm_plane_create_blend_mode_property(plane, supported_modes);
331
332 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_WIN_BLEND)
333 drm_plane_create_alpha_property(plane);
334
335 return 0;
336 }
337