1 /* 2 * drivers/gpu/drm/omapdrm/omap_plane.c 3 * 4 * Copyright (C) 2011 Texas Instruments 5 * Author: Rob Clark <rob.clark@linaro.org> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 as published by 9 * the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "drm_flip_work.h" 21 22 #include "omap_drv.h" 23 #include "omap_dmm_tiler.h" 24 25 /* some hackery because omapdss has an 'enum omap_plane' (which would be 26 * better named omap_plane_id).. and compiler seems unhappy about having 27 * both a 'struct omap_plane' and 'enum omap_plane' 28 */ 29 #define omap_plane _omap_plane 30 31 /* 32 * plane funcs 33 */ 34 35 struct callback { 36 void (*fxn)(void *); 37 void *arg; 38 }; 39 40 #define to_omap_plane(x) container_of(x, struct omap_plane, base) 41 42 struct omap_plane { 43 struct drm_plane base; 44 int id; /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */ 45 const char *name; 46 struct omap_overlay_info info; 47 struct omap_drm_apply apply; 48 49 /* position/orientation of scanout within the fb: */ 50 struct omap_drm_window win; 51 bool enabled; 52 53 /* last fb that we pinned: */ 54 struct drm_framebuffer *pinned_fb; 55 56 uint32_t nformats; 57 uint32_t formats[32]; 58 59 struct omap_drm_irq error_irq; 60 61 /* for deferring bo unpin's until next post_apply(): */ 62 struct drm_flip_work unpin_work; 63 64 // XXX maybe get rid of this and handle vblank in crtc too? 65 struct callback apply_done_cb; 66 }; 67 68 static void unpin_worker(struct drm_flip_work *work, void *val) 69 { 70 struct omap_plane *omap_plane = 71 container_of(work, struct omap_plane, unpin_work); 72 struct drm_device *dev = omap_plane->base.dev; 73 74 omap_framebuffer_unpin(val); 75 mutex_lock(&dev->mode_config.mutex); 76 drm_framebuffer_unreference(val); 77 mutex_unlock(&dev->mode_config.mutex); 78 } 79 80 /* update which fb (if any) is pinned for scanout */ 81 static int update_pin(struct drm_plane *plane, struct drm_framebuffer *fb) 82 { 83 struct omap_plane *omap_plane = to_omap_plane(plane); 84 struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb; 85 86 if (pinned_fb != fb) { 87 int ret = 0; 88 89 DBG("%p -> %p", pinned_fb, fb); 90 91 if (fb) { 92 drm_framebuffer_reference(fb); 93 ret = omap_framebuffer_pin(fb); 94 } 95 96 if (pinned_fb) 97 drm_flip_work_queue(&omap_plane->unpin_work, pinned_fb); 98 99 if (ret) { 100 dev_err(plane->dev->dev, "could not swap %p -> %p\n", 101 omap_plane->pinned_fb, fb); 102 drm_framebuffer_unreference(fb); 103 omap_plane->pinned_fb = NULL; 104 return ret; 105 } 106 107 omap_plane->pinned_fb = fb; 108 } 109 110 return 0; 111 } 112 113 static void omap_plane_pre_apply(struct omap_drm_apply *apply) 114 { 115 struct omap_plane *omap_plane = 116 container_of(apply, struct omap_plane, apply); 117 struct omap_drm_window *win = &omap_plane->win; 118 struct drm_plane *plane = &omap_plane->base; 119 struct drm_device *dev = plane->dev; 120 struct omap_overlay_info *info = &omap_plane->info; 121 struct drm_crtc *crtc = plane->crtc; 122 enum omap_channel channel; 123 bool enabled = omap_plane->enabled && crtc; 124 bool ilace, replication; 125 int ret; 126 127 DBG("%s, enabled=%d", omap_plane->name, enabled); 128 129 /* if fb has changed, pin new fb: */ 130 update_pin(plane, enabled ? plane->fb : NULL); 131 132 if (!enabled) { 133 dispc_ovl_enable(omap_plane->id, false); 134 return; 135 } 136 137 channel = omap_crtc_channel(crtc); 138 139 /* update scanout: */ 140 omap_framebuffer_update_scanout(plane->fb, win, info); 141 142 DBG("%dx%d -> %dx%d (%d)", info->width, info->height, 143 info->out_width, info->out_height, 144 info->screen_width); 145 DBG("%d,%d %08x %08x", info->pos_x, info->pos_y, 146 info->paddr, info->p_uv_addr); 147 148 /* TODO: */ 149 ilace = false; 150 replication = false; 151 152 /* and finally, update omapdss: */ 153 ret = dispc_ovl_setup(omap_plane->id, info, 154 replication, omap_crtc_timings(crtc), false); 155 if (ret) { 156 dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret); 157 return; 158 } 159 160 dispc_ovl_enable(omap_plane->id, true); 161 dispc_ovl_set_channel_out(omap_plane->id, channel); 162 } 163 164 static void omap_plane_post_apply(struct omap_drm_apply *apply) 165 { 166 struct omap_plane *omap_plane = 167 container_of(apply, struct omap_plane, apply); 168 struct drm_plane *plane = &omap_plane->base; 169 struct omap_drm_private *priv = plane->dev->dev_private; 170 struct omap_overlay_info *info = &omap_plane->info; 171 struct callback cb; 172 173 cb = omap_plane->apply_done_cb; 174 omap_plane->apply_done_cb.fxn = NULL; 175 176 drm_flip_work_commit(&omap_plane->unpin_work, priv->wq); 177 178 if (cb.fxn) 179 cb.fxn(cb.arg); 180 181 if (omap_plane->enabled) { 182 omap_framebuffer_flush(plane->fb, info->pos_x, info->pos_y, 183 info->out_width, info->out_height); 184 } 185 } 186 187 static int apply(struct drm_plane *plane) 188 { 189 if (plane->crtc) { 190 struct omap_plane *omap_plane = to_omap_plane(plane); 191 return omap_crtc_apply(plane->crtc, &omap_plane->apply); 192 } 193 return 0; 194 } 195 196 int omap_plane_mode_set(struct drm_plane *plane, 197 struct drm_crtc *crtc, struct drm_framebuffer *fb, 198 int crtc_x, int crtc_y, 199 unsigned int crtc_w, unsigned int crtc_h, 200 uint32_t src_x, uint32_t src_y, 201 uint32_t src_w, uint32_t src_h, 202 void (*fxn)(void *), void *arg) 203 { 204 struct omap_plane *omap_plane = to_omap_plane(plane); 205 struct omap_drm_window *win = &omap_plane->win; 206 207 win->crtc_x = crtc_x; 208 win->crtc_y = crtc_y; 209 win->crtc_w = crtc_w; 210 win->crtc_h = crtc_h; 211 212 /* src values are in Q16 fixed point, convert to integer: */ 213 win->src_x = src_x >> 16; 214 win->src_y = src_y >> 16; 215 win->src_w = src_w >> 16; 216 win->src_h = src_h >> 16; 217 218 if (fxn) { 219 /* omap_crtc should ensure that a new page flip 220 * isn't permitted while there is one pending: 221 */ 222 BUG_ON(omap_plane->apply_done_cb.fxn); 223 224 omap_plane->apply_done_cb.fxn = fxn; 225 omap_plane->apply_done_cb.arg = arg; 226 } 227 228 if (plane->fb) 229 drm_framebuffer_unreference(plane->fb); 230 231 drm_framebuffer_reference(fb); 232 233 plane->fb = fb; 234 plane->crtc = crtc; 235 236 return apply(plane); 237 } 238 239 static int omap_plane_update(struct drm_plane *plane, 240 struct drm_crtc *crtc, struct drm_framebuffer *fb, 241 int crtc_x, int crtc_y, 242 unsigned int crtc_w, unsigned int crtc_h, 243 uint32_t src_x, uint32_t src_y, 244 uint32_t src_w, uint32_t src_h) 245 { 246 struct omap_plane *omap_plane = to_omap_plane(plane); 247 omap_plane->enabled = true; 248 249 /* omap_plane_mode_set() takes adjusted src */ 250 switch (omap_plane->win.rotation & 0xf) { 251 case BIT(DRM_ROTATE_90): 252 case BIT(DRM_ROTATE_270): 253 swap(src_w, src_h); 254 break; 255 } 256 257 return omap_plane_mode_set(plane, crtc, fb, 258 crtc_x, crtc_y, crtc_w, crtc_h, 259 src_x, src_y, src_w, src_h, 260 NULL, NULL); 261 } 262 263 static int omap_plane_disable(struct drm_plane *plane) 264 { 265 struct omap_plane *omap_plane = to_omap_plane(plane); 266 omap_plane->win.rotation = BIT(DRM_ROTATE_0); 267 return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF); 268 } 269 270 static void omap_plane_destroy(struct drm_plane *plane) 271 { 272 struct omap_plane *omap_plane = to_omap_plane(plane); 273 274 DBG("%s", omap_plane->name); 275 276 omap_irq_unregister(plane->dev, &omap_plane->error_irq); 277 278 omap_plane_disable(plane); 279 drm_plane_cleanup(plane); 280 281 drm_flip_work_cleanup(&omap_plane->unpin_work); 282 283 kfree(omap_plane); 284 } 285 286 int omap_plane_dpms(struct drm_plane *plane, int mode) 287 { 288 struct omap_plane *omap_plane = to_omap_plane(plane); 289 bool enabled = (mode == DRM_MODE_DPMS_ON); 290 int ret = 0; 291 292 if (enabled != omap_plane->enabled) { 293 omap_plane->enabled = enabled; 294 ret = apply(plane); 295 } 296 297 return ret; 298 } 299 300 /* helper to install properties which are common to planes and crtcs */ 301 void omap_plane_install_properties(struct drm_plane *plane, 302 struct drm_mode_object *obj) 303 { 304 struct drm_device *dev = plane->dev; 305 struct omap_drm_private *priv = dev->dev_private; 306 struct drm_property *prop; 307 308 if (priv->has_dmm) { 309 prop = priv->rotation_prop; 310 if (!prop) { 311 const struct drm_prop_enum_list props[] = { 312 { DRM_ROTATE_0, "rotate-0" }, 313 { DRM_ROTATE_90, "rotate-90" }, 314 { DRM_ROTATE_180, "rotate-180" }, 315 { DRM_ROTATE_270, "rotate-270" }, 316 { DRM_REFLECT_X, "reflect-x" }, 317 { DRM_REFLECT_Y, "reflect-y" }, 318 }; 319 prop = drm_property_create_bitmask(dev, 0, "rotation", 320 props, ARRAY_SIZE(props)); 321 if (prop == NULL) 322 return; 323 priv->rotation_prop = prop; 324 } 325 drm_object_attach_property(obj, prop, 0); 326 } 327 328 prop = priv->zorder_prop; 329 if (!prop) { 330 prop = drm_property_create_range(dev, 0, "zorder", 0, 3); 331 if (prop == NULL) 332 return; 333 priv->zorder_prop = prop; 334 } 335 drm_object_attach_property(obj, prop, 0); 336 } 337 338 int omap_plane_set_property(struct drm_plane *plane, 339 struct drm_property *property, uint64_t val) 340 { 341 struct omap_plane *omap_plane = to_omap_plane(plane); 342 struct omap_drm_private *priv = plane->dev->dev_private; 343 int ret = -EINVAL; 344 345 if (property == priv->rotation_prop) { 346 DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val); 347 omap_plane->win.rotation = val; 348 ret = apply(plane); 349 } else if (property == priv->zorder_prop) { 350 DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val); 351 omap_plane->info.zorder = val; 352 ret = apply(plane); 353 } 354 355 return ret; 356 } 357 358 static const struct drm_plane_funcs omap_plane_funcs = { 359 .update_plane = omap_plane_update, 360 .disable_plane = omap_plane_disable, 361 .destroy = omap_plane_destroy, 362 .set_property = omap_plane_set_property, 363 }; 364 365 static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus) 366 { 367 struct omap_plane *omap_plane = 368 container_of(irq, struct omap_plane, error_irq); 369 DRM_ERROR("%s: errors: %08x\n", omap_plane->name, irqstatus); 370 } 371 372 static const char *plane_names[] = { 373 [OMAP_DSS_GFX] = "gfx", 374 [OMAP_DSS_VIDEO1] = "vid1", 375 [OMAP_DSS_VIDEO2] = "vid2", 376 [OMAP_DSS_VIDEO3] = "vid3", 377 }; 378 379 static const uint32_t error_irqs[] = { 380 [OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW, 381 [OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW, 382 [OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW, 383 [OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW, 384 }; 385 386 /* initialize plane */ 387 struct drm_plane *omap_plane_init(struct drm_device *dev, 388 int id, bool private_plane) 389 { 390 struct omap_drm_private *priv = dev->dev_private; 391 struct drm_plane *plane = NULL; 392 struct omap_plane *omap_plane; 393 struct omap_overlay_info *info; 394 int ret; 395 396 DBG("%s: priv=%d", plane_names[id], private_plane); 397 398 omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL); 399 if (!omap_plane) 400 goto fail; 401 402 ret = drm_flip_work_init(&omap_plane->unpin_work, 16, 403 "unpin", unpin_worker); 404 if (ret) { 405 dev_err(dev->dev, "could not allocate unpin FIFO\n"); 406 goto fail; 407 } 408 409 omap_plane->nformats = omap_framebuffer_get_formats( 410 omap_plane->formats, ARRAY_SIZE(omap_plane->formats), 411 dss_feat_get_supported_color_modes(id)); 412 omap_plane->id = id; 413 omap_plane->name = plane_names[id]; 414 415 plane = &omap_plane->base; 416 417 omap_plane->apply.pre_apply = omap_plane_pre_apply; 418 omap_plane->apply.post_apply = omap_plane_post_apply; 419 420 omap_plane->error_irq.irqmask = error_irqs[id]; 421 omap_plane->error_irq.irq = omap_plane_error_irq; 422 omap_irq_register(dev, &omap_plane->error_irq); 423 424 drm_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs, 425 omap_plane->formats, omap_plane->nformats, private_plane); 426 427 omap_plane_install_properties(plane, &plane->base); 428 429 /* get our starting configuration, set defaults for parameters 430 * we don't currently use, etc: 431 */ 432 info = &omap_plane->info; 433 info->rotation_type = OMAP_DSS_ROT_DMA; 434 info->rotation = OMAP_DSS_ROT_0; 435 info->global_alpha = 0xff; 436 info->mirror = 0; 437 438 /* Set defaults depending on whether we are a CRTC or overlay 439 * layer. 440 * TODO add ioctl to give userspace an API to change this.. this 441 * will come in a subsequent patch. 442 */ 443 if (private_plane) 444 omap_plane->info.zorder = 0; 445 else 446 omap_plane->info.zorder = id; 447 448 return plane; 449 450 fail: 451 if (plane) 452 omap_plane_destroy(plane); 453 454 return NULL; 455 } 456