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 */ 45 static 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 60 static 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 } 126 127 static 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 } 147 148 static struct drm_plane_state * 149 exynos_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 } 162 163 static 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 } 171 172 static 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 }; 181 182 static int 183 exynos_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 } 211 212 static 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 } 229 230 static 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 exynos_plane->pending_fb = state->fb; 242 243 if (exynos_crtc->ops->update_plane) 244 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane); 245 } 246 247 static void exynos_plane_atomic_disable(struct drm_plane *plane, 248 struct drm_plane_state *old_state) 249 { 250 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 251 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc); 252 253 if (!old_state->crtc) 254 return; 255 256 if (exynos_crtc->ops->disable_plane) 257 exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane); 258 } 259 260 static const struct drm_plane_helper_funcs plane_helper_funcs = { 261 .atomic_check = exynos_plane_atomic_check, 262 .atomic_update = exynos_plane_atomic_update, 263 .atomic_disable = exynos_plane_atomic_disable, 264 }; 265 266 static void exynos_plane_attach_zpos_property(struct drm_plane *plane, 267 bool immutable) 268 { 269 /* FIXME */ 270 if (immutable) 271 drm_plane_create_zpos_immutable_property(plane, 0); 272 else 273 drm_plane_create_zpos_property(plane, 0, 0, MAX_PLANE - 1); 274 } 275 276 int exynos_plane_init(struct drm_device *dev, 277 struct exynos_drm_plane *exynos_plane, 278 unsigned int index, unsigned long possible_crtcs, 279 const struct exynos_drm_plane_config *config) 280 { 281 int err; 282 283 err = drm_universal_plane_init(dev, &exynos_plane->base, 284 possible_crtcs, 285 &exynos_plane_funcs, 286 config->pixel_formats, 287 config->num_pixel_formats, 288 config->type, NULL); 289 if (err) { 290 DRM_ERROR("failed to initialize plane\n"); 291 return err; 292 } 293 294 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs); 295 296 exynos_plane->index = index; 297 exynos_plane->config = config; 298 299 exynos_plane_attach_zpos_property(&exynos_plane->base, 300 !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS)); 301 302 return 0; 303 } 304