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 35struct callback { 36 void (*fxn)(void *); 37 void *arg; 38}; 39 40#define to_omap_plane(x) container_of(x, struct omap_plane, base) 41 42struct 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 68static void omap_plane_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 /* 75 * omap_framebuffer_pin/unpin are always called from priv->wq, 76 * so there's no need for locking here. 77 */ 78 omap_framebuffer_unpin(val); 79 mutex_lock(&dev->mode_config.mutex); 80 drm_framebuffer_unreference(val); 81 mutex_unlock(&dev->mode_config.mutex); 82} 83 84/* update which fb (if any) is pinned for scanout */ 85static int omap_plane_update_pin(struct drm_plane *plane, 86 struct drm_framebuffer *fb) 87{ 88 struct omap_plane *omap_plane = to_omap_plane(plane); 89 struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb; 90 91 if (pinned_fb != fb) { 92 int ret = 0; 93 94 DBG("%p -> %p", pinned_fb, fb); 95 96 if (fb) { 97 drm_framebuffer_reference(fb); 98 ret = omap_framebuffer_pin(fb); 99 } 100 101 if (pinned_fb) 102 drm_flip_work_queue(&omap_plane->unpin_work, pinned_fb); 103 104 if (ret) { 105 dev_err(plane->dev->dev, "could not swap %p -> %p\n", 106 omap_plane->pinned_fb, fb); 107 drm_framebuffer_unreference(fb); 108 omap_plane->pinned_fb = NULL; 109 return ret; 110 } 111 112 omap_plane->pinned_fb = fb; 113 } 114 115 return 0; 116} 117 118static void omap_plane_pre_apply(struct omap_drm_apply *apply) 119{ 120 struct omap_plane *omap_plane = 121 container_of(apply, struct omap_plane, apply); 122 struct omap_drm_window *win = &omap_plane->win; 123 struct drm_plane *plane = &omap_plane->base; 124 struct drm_device *dev = plane->dev; 125 struct omap_overlay_info *info = &omap_plane->info; 126 struct drm_crtc *crtc = plane->crtc; 127 enum omap_channel channel; 128 bool enabled = omap_plane->enabled && crtc; 129 int ret; 130 131 DBG("%s, enabled=%d", omap_plane->name, enabled); 132 133 /* if fb has changed, pin new fb: */ 134 omap_plane_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 %pad %pad", info->pos_x, info->pos_y, 150 &info->paddr, &info->p_uv_addr); 151 152 dispc_ovl_set_channel_out(omap_plane->id, channel); 153 154 /* and finally, update omapdss: */ 155 ret = dispc_ovl_setup(omap_plane->id, info, false, 156 omap_crtc_timings(crtc), false); 157 if (ret) { 158 dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret); 159 return; 160 } 161 162 dispc_ovl_enable(omap_plane->id, true); 163} 164 165static void omap_plane_post_apply(struct omap_drm_apply *apply) 166{ 167 struct omap_plane *omap_plane = 168 container_of(apply, struct omap_plane, apply); 169 struct drm_plane *plane = &omap_plane->base; 170 struct omap_drm_private *priv = plane->dev->dev_private; 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 182static int omap_plane_apply(struct drm_plane *plane) 183{ 184 if (plane->crtc) { 185 struct omap_plane *omap_plane = to_omap_plane(plane); 186 return omap_crtc_apply(plane->crtc, &omap_plane->apply); 187 } 188 return 0; 189} 190 191int omap_plane_mode_set(struct drm_plane *plane, 192 struct drm_crtc *crtc, struct drm_framebuffer *fb, 193 int crtc_x, int crtc_y, 194 unsigned int crtc_w, unsigned int crtc_h, 195 unsigned int src_x, unsigned int src_y, 196 unsigned int src_w, unsigned int src_h, 197 void (*fxn)(void *), void *arg) 198{ 199 struct omap_plane *omap_plane = to_omap_plane(plane); 200 struct omap_drm_window *win = &omap_plane->win; 201 202 win->crtc_x = crtc_x; 203 win->crtc_y = crtc_y; 204 win->crtc_w = crtc_w; 205 win->crtc_h = crtc_h; 206 207 win->src_x = src_x; 208 win->src_y = src_y; 209 win->src_w = src_w; 210 win->src_h = src_h; 211 212 if (fxn) { 213 /* omap_crtc should ensure that a new page flip 214 * isn't permitted while there is one pending: 215 */ 216 BUG_ON(omap_plane->apply_done_cb.fxn); 217 218 omap_plane->apply_done_cb.fxn = fxn; 219 omap_plane->apply_done_cb.arg = arg; 220 } 221 222 return omap_plane_apply(plane); 223} 224 225static int omap_plane_update(struct drm_plane *plane, 226 struct drm_crtc *crtc, struct drm_framebuffer *fb, 227 int crtc_x, int crtc_y, 228 unsigned int crtc_w, unsigned int crtc_h, 229 uint32_t src_x, uint32_t src_y, 230 uint32_t src_w, uint32_t src_h) 231{ 232 struct omap_plane *omap_plane = to_omap_plane(plane); 233 omap_plane->enabled = true; 234 235 /* omap_plane_mode_set() takes adjusted src */ 236 switch (omap_plane->win.rotation & 0xf) { 237 case BIT(DRM_ROTATE_90): 238 case BIT(DRM_ROTATE_270): 239 swap(src_w, src_h); 240 break; 241 } 242 243 /* 244 * We don't need to take a reference to the framebuffer as the DRM core 245 * has already done so for the purpose of setting plane->fb. 246 */ 247 plane->fb = fb; 248 plane->crtc = crtc; 249 250 /* src values are in Q16 fixed point, convert to integer: */ 251 return omap_plane_mode_set(plane, crtc, fb, 252 crtc_x, crtc_y, crtc_w, crtc_h, 253 src_x >> 16, src_y >> 16, src_w >> 16, src_h >> 16, 254 NULL, NULL); 255} 256 257static int omap_plane_disable(struct drm_plane *plane) 258{ 259 struct omap_plane *omap_plane = to_omap_plane(plane); 260 261 omap_plane->win.rotation = BIT(DRM_ROTATE_0); 262 omap_plane->info.zorder = plane->type == DRM_PLANE_TYPE_PRIMARY 263 ? 0 : omap_plane->id; 264 265 return omap_plane_set_enable(plane, false); 266} 267 268static void omap_plane_destroy(struct drm_plane *plane) 269{ 270 struct omap_plane *omap_plane = to_omap_plane(plane); 271 272 DBG("%s", omap_plane->name); 273 274 omap_irq_unregister(plane->dev, &omap_plane->error_irq); 275 276 drm_plane_cleanup(plane); 277 278 drm_flip_work_cleanup(&omap_plane->unpin_work); 279 280 kfree(omap_plane); 281} 282 283int omap_plane_set_enable(struct drm_plane *plane, bool enable) 284{ 285 struct omap_plane *omap_plane = to_omap_plane(plane); 286 287 if (enable == omap_plane->enabled) 288 return 0; 289 290 omap_plane->enabled = enable; 291 return omap_plane_apply(plane); 292} 293 294/* helper to install properties which are common to planes and crtcs */ 295void omap_plane_install_properties(struct drm_plane *plane, 296 struct drm_mode_object *obj) 297{ 298 struct drm_device *dev = plane->dev; 299 struct omap_drm_private *priv = dev->dev_private; 300 struct drm_property *prop; 301 302 if (priv->has_dmm) { 303 prop = priv->rotation_prop; 304 if (!prop) { 305 prop = drm_mode_create_rotation_property(dev, 306 BIT(DRM_ROTATE_0) | 307 BIT(DRM_ROTATE_90) | 308 BIT(DRM_ROTATE_180) | 309 BIT(DRM_ROTATE_270) | 310 BIT(DRM_REFLECT_X) | 311 BIT(DRM_REFLECT_Y)); 312 if (prop == NULL) 313 return; 314 priv->rotation_prop = prop; 315 } 316 drm_object_attach_property(obj, prop, 0); 317 } 318 319 prop = priv->zorder_prop; 320 if (!prop) { 321 prop = drm_property_create_range(dev, 0, "zorder", 0, 3); 322 if (prop == NULL) 323 return; 324 priv->zorder_prop = prop; 325 } 326 drm_object_attach_property(obj, prop, 0); 327} 328 329int omap_plane_set_property(struct drm_plane *plane, 330 struct drm_property *property, uint64_t val) 331{ 332 struct omap_plane *omap_plane = to_omap_plane(plane); 333 struct omap_drm_private *priv = plane->dev->dev_private; 334 int ret = -EINVAL; 335 336 if (property == priv->rotation_prop) { 337 DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val); 338 omap_plane->win.rotation = val; 339 ret = omap_plane_apply(plane); 340 } else if (property == priv->zorder_prop) { 341 DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val); 342 omap_plane->info.zorder = val; 343 ret = omap_plane_apply(plane); 344 } 345 346 return ret; 347} 348 349static const struct drm_plane_funcs omap_plane_funcs = { 350 .update_plane = omap_plane_update, 351 .disable_plane = omap_plane_disable, 352 .destroy = omap_plane_destroy, 353 .set_property = omap_plane_set_property, 354}; 355 356static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus) 357{ 358 struct omap_plane *omap_plane = 359 container_of(irq, struct omap_plane, error_irq); 360 DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_plane->name, 361 irqstatus); 362} 363 364static 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 371static 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 */ 379struct drm_plane *omap_plane_init(struct drm_device *dev, 380 int id, enum drm_plane_type type) 381{ 382 struct omap_drm_private *priv = dev->dev_private; 383 struct drm_plane *plane; 384 struct omap_plane *omap_plane; 385 struct omap_overlay_info *info; 386 int ret; 387 388 DBG("%s: type=%d", plane_names[id], type); 389 390 omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL); 391 if (!omap_plane) 392 return ERR_PTR(-ENOMEM); 393 394 drm_flip_work_init(&omap_plane->unpin_work, 395 "unpin", omap_plane_unpin_worker); 396 397 omap_plane->nformats = omap_framebuffer_get_formats( 398 omap_plane->formats, ARRAY_SIZE(omap_plane->formats), 399 dss_feat_get_supported_color_modes(id)); 400 omap_plane->id = id; 401 omap_plane->name = plane_names[id]; 402 403 plane = &omap_plane->base; 404 405 omap_plane->apply.pre_apply = omap_plane_pre_apply; 406 omap_plane->apply.post_apply = omap_plane_post_apply; 407 408 omap_plane->error_irq.irqmask = error_irqs[id]; 409 omap_plane->error_irq.irq = omap_plane_error_irq; 410 omap_irq_register(dev, &omap_plane->error_irq); 411 412 ret = drm_universal_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, 413 &omap_plane_funcs, omap_plane->formats, 414 omap_plane->nformats, type); 415 if (ret < 0) 416 goto error; 417 418 omap_plane_install_properties(plane, &plane->base); 419 420 /* get our starting configuration, set defaults for parameters 421 * we don't currently use, etc: 422 */ 423 info = &omap_plane->info; 424 info->rotation_type = OMAP_DSS_ROT_DMA; 425 info->rotation = OMAP_DSS_ROT_0; 426 info->global_alpha = 0xff; 427 info->mirror = 0; 428 429 /* Set defaults depending on whether we are a CRTC or overlay 430 * layer. 431 * TODO add ioctl to give userspace an API to change this.. this 432 * will come in a subsequent patch. 433 */ 434 if (type == DRM_PLANE_TYPE_PRIMARY) 435 omap_plane->info.zorder = 0; 436 else 437 omap_plane->info.zorder = id; 438 439 return plane; 440 441error: 442 omap_irq_unregister(plane->dev, &omap_plane->error_irq); 443 kfree(omap_plane); 444 return NULL; 445} 446