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