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 <linux/kfifo.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 /* set of bo's pending unpin until next post_apply() */ 62 DECLARE_KFIFO_PTR(unpin_fifo, struct drm_gem_object *); 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(void *arg, struct drm_gem_object *bo) 69 { 70 struct drm_plane *plane = arg; 71 struct omap_plane *omap_plane = to_omap_plane(plane); 72 73 if (kfifo_put(&omap_plane->unpin_fifo, 74 (const struct drm_gem_object **)&bo)) { 75 /* also hold a ref so it isn't free'd while pinned */ 76 drm_gem_object_reference(bo); 77 } else { 78 dev_err(plane->dev->dev, "unpin fifo full!\n"); 79 omap_gem_put_paddr(bo); 80 } 81 } 82 83 /* update which fb (if any) is pinned for scanout */ 84 static int update_pin(struct drm_plane *plane, struct drm_framebuffer *fb) 85 { 86 struct omap_plane *omap_plane = to_omap_plane(plane); 87 struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb; 88 89 if (pinned_fb != fb) { 90 int ret; 91 92 DBG("%p -> %p", pinned_fb, fb); 93 94 if (fb) 95 drm_framebuffer_reference(fb); 96 97 ret = omap_framebuffer_replace(pinned_fb, fb, plane, unpin); 98 99 if (pinned_fb) 100 drm_framebuffer_unreference(pinned_fb); 101 102 if (ret) { 103 dev_err(plane->dev->dev, "could not swap %p -> %p\n", 104 omap_plane->pinned_fb, fb); 105 if (fb) 106 drm_framebuffer_unreference(fb); 107 omap_plane->pinned_fb = NULL; 108 return ret; 109 } 110 111 omap_plane->pinned_fb = fb; 112 } 113 114 return 0; 115 } 116 117 static void omap_plane_pre_apply(struct omap_drm_apply *apply) 118 { 119 struct omap_plane *omap_plane = 120 container_of(apply, struct omap_plane, apply); 121 struct omap_drm_window *win = &omap_plane->win; 122 struct drm_plane *plane = &omap_plane->base; 123 struct drm_device *dev = plane->dev; 124 struct omap_overlay_info *info = &omap_plane->info; 125 struct drm_crtc *crtc = plane->crtc; 126 enum omap_channel channel; 127 bool enabled = omap_plane->enabled && crtc; 128 bool ilace, replication; 129 int ret; 130 131 DBG("%s, enabled=%d", omap_plane->name, enabled); 132 133 /* if fb has changed, pin new fb: */ 134 update_pin(plane, enabled ? plane->fb : NULL); 135 136 if (!enabled) { 137 dispc_ovl_enable(omap_plane->id, false); 138 return; 139 } 140 141 channel = omap_crtc_channel(crtc); 142 143 /* update scanout: */ 144 omap_framebuffer_update_scanout(plane->fb, win, info); 145 146 DBG("%dx%d -> %dx%d (%d)", info->width, info->height, 147 info->out_width, info->out_height, 148 info->screen_width); 149 DBG("%d,%d %08x %08x", info->pos_x, info->pos_y, 150 info->paddr, info->p_uv_addr); 151 152 /* TODO: */ 153 ilace = false; 154 replication = false; 155 156 /* and finally, update omapdss: */ 157 ret = dispc_ovl_setup(omap_plane->id, info, 158 replication, omap_crtc_timings(crtc), false); 159 if (ret) { 160 dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret); 161 return; 162 } 163 164 dispc_ovl_enable(omap_plane->id, true); 165 dispc_ovl_set_channel_out(omap_plane->id, channel); 166 } 167 168 static void omap_plane_post_apply(struct omap_drm_apply *apply) 169 { 170 struct omap_plane *omap_plane = 171 container_of(apply, struct omap_plane, apply); 172 struct drm_plane *plane = &omap_plane->base; 173 struct omap_overlay_info *info = &omap_plane->info; 174 struct drm_gem_object *bo = NULL; 175 struct callback cb; 176 177 cb = omap_plane->apply_done_cb; 178 omap_plane->apply_done_cb.fxn = NULL; 179 180 while (kfifo_get(&omap_plane->unpin_fifo, &bo)) { 181 omap_gem_put_paddr(bo); 182 drm_gem_object_unreference_unlocked(bo); 183 } 184 185 if (cb.fxn) 186 cb.fxn(cb.arg); 187 188 if (omap_plane->enabled) { 189 omap_framebuffer_flush(plane->fb, info->pos_x, info->pos_y, 190 info->out_width, info->out_height); 191 } 192 } 193 194 static int apply(struct drm_plane *plane) 195 { 196 if (plane->crtc) { 197 struct omap_plane *omap_plane = to_omap_plane(plane); 198 return omap_crtc_apply(plane->crtc, &omap_plane->apply); 199 } 200 return 0; 201 } 202 203 int omap_plane_mode_set(struct drm_plane *plane, 204 struct drm_crtc *crtc, struct drm_framebuffer *fb, 205 int crtc_x, int crtc_y, 206 unsigned int crtc_w, unsigned int crtc_h, 207 uint32_t src_x, uint32_t src_y, 208 uint32_t src_w, uint32_t src_h, 209 void (*fxn)(void *), void *arg) 210 { 211 struct omap_plane *omap_plane = to_omap_plane(plane); 212 struct omap_drm_window *win = &omap_plane->win; 213 214 win->crtc_x = crtc_x; 215 win->crtc_y = crtc_y; 216 win->crtc_w = crtc_w; 217 win->crtc_h = crtc_h; 218 219 /* src values are in Q16 fixed point, convert to integer: */ 220 win->src_x = src_x >> 16; 221 win->src_y = src_y >> 16; 222 win->src_w = src_w >> 16; 223 win->src_h = src_h >> 16; 224 225 if (fxn) { 226 /* omap_crtc should ensure that a new page flip 227 * isn't permitted while there is one pending: 228 */ 229 BUG_ON(omap_plane->apply_done_cb.fxn); 230 231 omap_plane->apply_done_cb.fxn = fxn; 232 omap_plane->apply_done_cb.arg = arg; 233 } 234 235 plane->fb = fb; 236 plane->crtc = crtc; 237 238 return apply(plane); 239 } 240 241 static int omap_plane_update(struct drm_plane *plane, 242 struct drm_crtc *crtc, struct drm_framebuffer *fb, 243 int crtc_x, int crtc_y, 244 unsigned int crtc_w, unsigned int crtc_h, 245 uint32_t src_x, uint32_t src_y, 246 uint32_t src_w, uint32_t src_h) 247 { 248 struct omap_plane *omap_plane = to_omap_plane(plane); 249 omap_plane->enabled = true; 250 251 if (plane->fb) 252 drm_framebuffer_unreference(plane->fb); 253 254 drm_framebuffer_reference(fb); 255 256 return omap_plane_mode_set(plane, crtc, fb, 257 crtc_x, crtc_y, crtc_w, crtc_h, 258 src_x, src_y, src_w, src_h, 259 NULL, NULL); 260 } 261 262 static int omap_plane_disable(struct drm_plane *plane) 263 { 264 struct omap_plane *omap_plane = to_omap_plane(plane); 265 omap_plane->win.rotation = BIT(DRM_ROTATE_0); 266 return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF); 267 } 268 269 static void omap_plane_destroy(struct drm_plane *plane) 270 { 271 struct omap_plane *omap_plane = to_omap_plane(plane); 272 273 DBG("%s", omap_plane->name); 274 275 omap_irq_unregister(plane->dev, &omap_plane->error_irq); 276 277 omap_plane_disable(plane); 278 drm_plane_cleanup(plane); 279 280 WARN_ON(!kfifo_is_empty(&omap_plane->unpin_fifo)); 281 kfifo_free(&omap_plane->unpin_fifo); 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 = kfifo_alloc(&omap_plane->unpin_fifo, 16, GFP_KERNEL); 403 if (ret) { 404 dev_err(dev->dev, "could not allocate unpin FIFO\n"); 405 goto fail; 406 } 407 408 omap_plane->nformats = omap_framebuffer_get_formats( 409 omap_plane->formats, ARRAY_SIZE(omap_plane->formats), 410 dss_feat_get_supported_color_modes(id)); 411 omap_plane->id = id; 412 omap_plane->name = plane_names[id]; 413 414 plane = &omap_plane->base; 415 416 omap_plane->apply.pre_apply = omap_plane_pre_apply; 417 omap_plane->apply.post_apply = omap_plane_post_apply; 418 419 omap_plane->error_irq.irqmask = error_irqs[id]; 420 omap_plane->error_irq.irq = omap_plane_error_irq; 421 omap_irq_register(dev, &omap_plane->error_irq); 422 423 drm_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs, 424 omap_plane->formats, omap_plane->nformats, private_plane); 425 426 omap_plane_install_properties(plane, &plane->base); 427 428 /* get our starting configuration, set defaults for parameters 429 * we don't currently use, etc: 430 */ 431 info = &omap_plane->info; 432 info->rotation_type = OMAP_DSS_ROT_DMA; 433 info->rotation = OMAP_DSS_ROT_0; 434 info->global_alpha = 0xff; 435 info->mirror = 0; 436 437 /* Set defaults depending on whether we are a CRTC or overlay 438 * layer. 439 * TODO add ioctl to give userspace an API to change this.. this 440 * will come in a subsequent patch. 441 */ 442 if (private_plane) 443 omap_plane->info.zorder = 0; 444 else 445 omap_plane->info.zorder = id; 446 447 return plane; 448 449 fail: 450 if (plane) 451 omap_plane_destroy(plane); 452 453 return NULL; 454 } 455