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 plane->fb = fb; 229 plane->crtc = crtc; 230 231 return apply(plane); 232 } 233 234 static int omap_plane_update(struct drm_plane *plane, 235 struct drm_crtc *crtc, struct drm_framebuffer *fb, 236 int crtc_x, int crtc_y, 237 unsigned int crtc_w, unsigned int crtc_h, 238 uint32_t src_x, uint32_t src_y, 239 uint32_t src_w, uint32_t src_h) 240 { 241 struct omap_plane *omap_plane = to_omap_plane(plane); 242 omap_plane->enabled = true; 243 244 if (plane->fb) 245 drm_framebuffer_unreference(plane->fb); 246 247 drm_framebuffer_reference(fb); 248 249 return omap_plane_mode_set(plane, crtc, fb, 250 crtc_x, crtc_y, crtc_w, crtc_h, 251 src_x, src_y, src_w, src_h, 252 NULL, NULL); 253 } 254 255 static int omap_plane_disable(struct drm_plane *plane) 256 { 257 struct omap_plane *omap_plane = to_omap_plane(plane); 258 omap_plane->win.rotation = BIT(DRM_ROTATE_0); 259 return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF); 260 } 261 262 static void omap_plane_destroy(struct drm_plane *plane) 263 { 264 struct omap_plane *omap_plane = to_omap_plane(plane); 265 266 DBG("%s", omap_plane->name); 267 268 omap_irq_unregister(plane->dev, &omap_plane->error_irq); 269 270 omap_plane_disable(plane); 271 drm_plane_cleanup(plane); 272 273 drm_flip_work_cleanup(&omap_plane->unpin_work); 274 275 kfree(omap_plane); 276 } 277 278 int omap_plane_dpms(struct drm_plane *plane, int mode) 279 { 280 struct omap_plane *omap_plane = to_omap_plane(plane); 281 bool enabled = (mode == DRM_MODE_DPMS_ON); 282 int ret = 0; 283 284 if (enabled != omap_plane->enabled) { 285 omap_plane->enabled = enabled; 286 ret = apply(plane); 287 } 288 289 return ret; 290 } 291 292 /* helper to install properties which are common to planes and crtcs */ 293 void omap_plane_install_properties(struct drm_plane *plane, 294 struct drm_mode_object *obj) 295 { 296 struct drm_device *dev = plane->dev; 297 struct omap_drm_private *priv = dev->dev_private; 298 struct drm_property *prop; 299 300 if (priv->has_dmm) { 301 prop = priv->rotation_prop; 302 if (!prop) { 303 const struct drm_prop_enum_list props[] = { 304 { DRM_ROTATE_0, "rotate-0" }, 305 { DRM_ROTATE_90, "rotate-90" }, 306 { DRM_ROTATE_180, "rotate-180" }, 307 { DRM_ROTATE_270, "rotate-270" }, 308 { DRM_REFLECT_X, "reflect-x" }, 309 { DRM_REFLECT_Y, "reflect-y" }, 310 }; 311 prop = drm_property_create_bitmask(dev, 0, "rotation", 312 props, ARRAY_SIZE(props)); 313 if (prop == NULL) 314 return; 315 priv->rotation_prop = prop; 316 } 317 drm_object_attach_property(obj, prop, 0); 318 } 319 320 prop = priv->zorder_prop; 321 if (!prop) { 322 prop = drm_property_create_range(dev, 0, "zorder", 0, 3); 323 if (prop == NULL) 324 return; 325 priv->zorder_prop = prop; 326 } 327 drm_object_attach_property(obj, prop, 0); 328 } 329 330 int omap_plane_set_property(struct drm_plane *plane, 331 struct drm_property *property, uint64_t val) 332 { 333 struct omap_plane *omap_plane = to_omap_plane(plane); 334 struct omap_drm_private *priv = plane->dev->dev_private; 335 int ret = -EINVAL; 336 337 if (property == priv->rotation_prop) { 338 DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val); 339 omap_plane->win.rotation = val; 340 ret = apply(plane); 341 } else if (property == priv->zorder_prop) { 342 DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val); 343 omap_plane->info.zorder = val; 344 ret = apply(plane); 345 } 346 347 return ret; 348 } 349 350 static const struct drm_plane_funcs omap_plane_funcs = { 351 .update_plane = omap_plane_update, 352 .disable_plane = omap_plane_disable, 353 .destroy = omap_plane_destroy, 354 .set_property = omap_plane_set_property, 355 }; 356 357 static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus) 358 { 359 struct omap_plane *omap_plane = 360 container_of(irq, struct omap_plane, error_irq); 361 DRM_ERROR("%s: errors: %08x\n", omap_plane->name, irqstatus); 362 } 363 364 static const char *plane_names[] = { 365 [OMAP_DSS_GFX] = "gfx", 366 [OMAP_DSS_VIDEO1] = "vid1", 367 [OMAP_DSS_VIDEO2] = "vid2", 368 [OMAP_DSS_VIDEO3] = "vid3", 369 }; 370 371 static const uint32_t error_irqs[] = { 372 [OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW, 373 [OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW, 374 [OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW, 375 [OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW, 376 }; 377 378 /* initialize plane */ 379 struct drm_plane *omap_plane_init(struct drm_device *dev, 380 int id, bool private_plane) 381 { 382 struct omap_drm_private *priv = dev->dev_private; 383 struct drm_plane *plane = NULL; 384 struct omap_plane *omap_plane; 385 struct omap_overlay_info *info; 386 int ret; 387 388 DBG("%s: priv=%d", plane_names[id], private_plane); 389 390 omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL); 391 if (!omap_plane) 392 goto fail; 393 394 ret = drm_flip_work_init(&omap_plane->unpin_work, 16, 395 "unpin", unpin_worker); 396 if (ret) { 397 dev_err(dev->dev, "could not allocate unpin FIFO\n"); 398 goto fail; 399 } 400 401 omap_plane->nformats = omap_framebuffer_get_formats( 402 omap_plane->formats, ARRAY_SIZE(omap_plane->formats), 403 dss_feat_get_supported_color_modes(id)); 404 omap_plane->id = id; 405 omap_plane->name = plane_names[id]; 406 407 plane = &omap_plane->base; 408 409 omap_plane->apply.pre_apply = omap_plane_pre_apply; 410 omap_plane->apply.post_apply = omap_plane_post_apply; 411 412 omap_plane->error_irq.irqmask = error_irqs[id]; 413 omap_plane->error_irq.irq = omap_plane_error_irq; 414 omap_irq_register(dev, &omap_plane->error_irq); 415 416 drm_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs, 417 omap_plane->formats, omap_plane->nformats, private_plane); 418 419 omap_plane_install_properties(plane, &plane->base); 420 421 /* get our starting configuration, set defaults for parameters 422 * we don't currently use, etc: 423 */ 424 info = &omap_plane->info; 425 info->rotation_type = OMAP_DSS_ROT_DMA; 426 info->rotation = OMAP_DSS_ROT_0; 427 info->global_alpha = 0xff; 428 info->mirror = 0; 429 430 /* Set defaults depending on whether we are a CRTC or overlay 431 * layer. 432 * TODO add ioctl to give userspace an API to change this.. this 433 * will come in a subsequent patch. 434 */ 435 if (private_plane) 436 omap_plane->info.zorder = 0; 437 else 438 omap_plane->info.zorder = id; 439 440 return plane; 441 442 fail: 443 if (plane) 444 omap_plane_destroy(plane); 445 446 return NULL; 447 } 448