kernel/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 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 */
  85 static 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
 118 static 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
 165 static 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
 182 static 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
 191 int 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
 225 static 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
 257 static 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
 268 static 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
 283 int 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 */
 295 void 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
 329 int 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
 349 static 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
 356 static 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
 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, 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
 441 error:
 442         omap_irq_unregister(plane->dev, &omap_plane->error_irq);
 443         kfree(omap_plane);
 444         return NULL;
 445 }