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