drivers/gpu/drm/omapdrm/omap_plane.c

   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 }