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 <[email protected]>
   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/drm_atomic.h>
  21 #include <drm/drm_atomic_helper.h>
  22 #include <drm/drm_plane_helper.h>
  23
  24 #include "omap_dmm_tiler.h"
  25 #include "omap_drv.h"
  26
  27 /*
  28  * plane funcs
  29  */
  30
  31 #define to_omap_plane(x) container_of(x, struct omap_plane, base)
  32
  33 struct omap_plane {
  34         struct drm_plane base;
  35         enum omap_plane_id id;
  36         const char *name;
  37
  38         uint32_t nformats;
  39         uint32_t formats[32];
  40 };
  41
  42 struct omap_plane_state {
  43         struct drm_plane_state base;
  44
  45         unsigned int zorder;
  46 };
  47
  48 static inline struct omap_plane_state *
  49 to_omap_plane_state(struct drm_plane_state *state)
  50 {
  51         return container_of(state, struct omap_plane_state, base);
  52 }
  53
  54 static int omap_plane_prepare_fb(struct drm_plane *plane,
  55                                  struct drm_plane_state *new_state)
  56 {
  57         if (!new_state->fb)
  58                 return 0;
  59
  60         return omap_framebuffer_pin(new_state->fb);
  61 }
  62
  63 static void omap_plane_cleanup_fb(struct drm_plane *plane,
  64                                   struct drm_plane_state *old_state)
  65 {
  66         if (old_state->fb)
  67                 omap_framebuffer_unpin(old_state->fb);
  68 }
  69
  70 static void omap_plane_atomic_update(struct drm_plane *plane,
  71                                      struct drm_plane_state *old_state)
  72 {
  73         struct omap_drm_private *priv = plane->dev->dev_private;
  74         struct omap_plane *omap_plane = to_omap_plane(plane);
  75         struct drm_plane_state *state = plane->state;
  76         struct omap_plane_state *omap_state = to_omap_plane_state(state);
  77         struct omap_overlay_info info;
  78         struct omap_drm_window win;
  79         int ret;
  80
  81         DBG("%s, crtc=%p fb=%p", omap_plane->name, state->crtc, state->fb);
  82
  83         memset(&info, 0, sizeof(info));
  84         info.rotation_type = OMAP_DSS_ROT_DMA;
  85         info.rotation = OMAP_DSS_ROT_0;
  86         info.global_alpha = 0xff;
  87         info.mirror = 0;
  88         info.zorder = omap_state->zorder;
  89
  90         memset(&win, 0, sizeof(win));
  91         win.rotation = state->rotation;
  92         win.crtc_x = state->crtc_x;
  93         win.crtc_y = state->crtc_y;
  94         win.crtc_w = state->crtc_w;
  95         win.crtc_h = state->crtc_h;
  96
  97         /*
  98          * src values are in Q16 fixed point, convert to integer.
  99          * omap_framebuffer_update_scanout() takes adjusted src.
 100          */
 101         win.src_x = state->src_x >> 16;
 102         win.src_y = state->src_y >> 16;
 103
 104         if (drm_rotation_90_or_270(state->rotation)) {
 105                 win.src_w = state->src_h >> 16;
 106                 win.src_h = state->src_w >> 16;
 107         } else {
 108                 win.src_w = state->src_w >> 16;
 109                 win.src_h = state->src_h >> 16;
 110         }
 111
 112         /* update scanout: */
 113         omap_framebuffer_update_scanout(state->fb, &win, &info);
 114
 115         DBG("%dx%d -> %dx%d (%d)", info.width, info.height,
 116                         info.out_width, info.out_height,
 117                         info.screen_width);
 118         DBG("%d,%d %pad %pad", info.pos_x, info.pos_y,
 119                         &info.paddr, &info.p_uv_addr);
 120
 121         priv->dispc_ops->ovl_set_channel_out(omap_plane->id,
 122                                   omap_crtc_channel(state->crtc));
 123
 124         /* and finally, update omapdss: */
 125         ret = priv->dispc_ops->ovl_setup(omap_plane->id, &info,
 126                               omap_crtc_timings(state->crtc), false);
 127         if (ret) {
 128                 dev_err(plane->dev->dev, "Failed to setup plane %s\n",
 129                         omap_plane->name);
 130                 priv->dispc_ops->ovl_enable(omap_plane->id, false);
 131                 return;
 132         }
 133
 134         priv->dispc_ops->ovl_enable(omap_plane->id, true);
 135 }
 136
 137 static void omap_plane_atomic_disable(struct drm_plane *plane,
 138                                       struct drm_plane_state *old_state)
 139 {
 140         struct omap_drm_private *priv = plane->dev->dev_private;
 141         struct omap_plane_state *omap_state = to_omap_plane_state(plane->state);
 142         struct omap_plane *omap_plane = to_omap_plane(plane);
 143
 144         plane->state->rotation = DRM_ROTATE_0;
 145         omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
 146                            ? 0 : omap_plane->id;
 147
 148         priv->dispc_ops->ovl_enable(omap_plane->id, false);
 149 }
 150
 151 static int omap_plane_atomic_check(struct drm_plane *plane,
 152                                    struct drm_plane_state *state)
 153 {
 154         struct drm_crtc_state *crtc_state;
 155
 156         if (!state->fb)
 157                 return 0;
 158
 159         /* crtc should only be NULL when disabling (i.e., !state->fb) */
 160         if (WARN_ON(!state->crtc))
 161                 return 0;
 162
 163         crtc_state = drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 164         /* we should have a crtc state if the plane is attached to a crtc */
 165         if (WARN_ON(!crtc_state))
 166                 return 0;
 167
 168         if (!crtc_state->enable)
 169                 return 0;
 170
 171         if (state->crtc_x < 0 || state->crtc_y < 0)
 172                 return -EINVAL;
 173
 174         if (state->crtc_x + state->crtc_w > crtc_state->adjusted_mode.hdisplay)
 175                 return -EINVAL;
 176
 177         if (state->crtc_y + state->crtc_h > crtc_state->adjusted_mode.vdisplay)
 178                 return -EINVAL;
 179
 180         if (state->rotation != DRM_ROTATE_0 &&
 181             !omap_framebuffer_supports_rotation(state->fb))
 182                 return -EINVAL;
 183
 184         return 0;
 185 }
 186
 187 static const struct drm_plane_helper_funcs omap_plane_helper_funcs = {
 188         .prepare_fb = omap_plane_prepare_fb,
 189         .cleanup_fb = omap_plane_cleanup_fb,
 190         .atomic_check = omap_plane_atomic_check,
 191         .atomic_update = omap_plane_atomic_update,
 192         .atomic_disable = omap_plane_atomic_disable,
 193 };
 194
 195 static void omap_plane_destroy(struct drm_plane *plane)
 196 {
 197         struct omap_plane *omap_plane = to_omap_plane(plane);
 198
 199         DBG("%s", omap_plane->name);
 200
 201         drm_plane_cleanup(plane);
 202
 203         kfree(omap_plane);
 204 }
 205
 206 /* helper to install properties which are common to planes and crtcs */
 207 void omap_plane_install_properties(struct drm_plane *plane,
 208                 struct drm_mode_object *obj)
 209 {
 210         struct drm_device *dev = plane->dev;
 211         struct omap_drm_private *priv = dev->dev_private;
 212
 213         if (priv->has_dmm) {
 214                 if (!plane->rotation_property)
 215                         drm_plane_create_rotation_property(plane,
 216                                                            DRM_ROTATE_0,
 217                                                            DRM_ROTATE_0 | DRM_ROTATE_90 |
 218                                                            DRM_ROTATE_180 | DRM_ROTATE_270 |
 219                                                            DRM_REFLECT_X | DRM_REFLECT_Y);
 220
 221                 /* Attach the rotation property also to the crtc object */
 222                 if (plane->rotation_property && obj != &plane->base)
 223                         drm_object_attach_property(obj, plane->rotation_property,
 224                                                    DRM_ROTATE_0);
 225         }
 226
 227         drm_object_attach_property(obj, priv->zorder_prop, 0);
 228 }
 229
 230 static struct drm_plane_state *
 231 omap_plane_atomic_duplicate_state(struct drm_plane *plane)
 232 {
 233         struct omap_plane_state *state;
 234         struct omap_plane_state *copy;
 235
 236         if (WARN_ON(!plane->state))
 237                 return NULL;
 238
 239         state = to_omap_plane_state(plane->state);
 240         copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
 241         if (copy == NULL)
 242                 return NULL;
 243
 244         __drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
 245
 246         return &copy->base;
 247 }
 248
 249 static void omap_plane_atomic_destroy_state(struct drm_plane *plane,
 250                                             struct drm_plane_state *state)
 251 {
 252         __drm_atomic_helper_plane_destroy_state(state);
 253         kfree(to_omap_plane_state(state));
 254 }
 255
 256 static void omap_plane_reset(struct drm_plane *plane)
 257 {
 258         struct omap_plane *omap_plane = to_omap_plane(plane);
 259         struct omap_plane_state *omap_state;
 260
 261         if (plane->state) {
 262                 omap_plane_atomic_destroy_state(plane, plane->state);
 263                 plane->state = NULL;
 264         }
 265
 266         omap_state = kzalloc(sizeof(*omap_state), GFP_KERNEL);
 267         if (omap_state == NULL)
 268                 return;
 269
 270         /*
 271          * Set defaults depending on whether we are a primary or overlay
 272          * plane.
 273          */
 274         omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
 275                            ? 0 : omap_plane->id;
 276         omap_state->base.rotation = DRM_ROTATE_0;
 277
 278         plane->state = &omap_state->base;
 279         plane->state->plane = plane;
 280 }
 281
 282 static int omap_plane_atomic_set_property(struct drm_plane *plane,
 283                                           struct drm_plane_state *state,
 284                                           struct drm_property *property,
 285                                           uint64_t val)
 286 {
 287         struct omap_drm_private *priv = plane->dev->dev_private;
 288         struct omap_plane_state *omap_state = to_omap_plane_state(state);
 289
 290         if (property == priv->zorder_prop)
 291                 omap_state->zorder = val;
 292         else
 293                 return -EINVAL;
 294
 295         return 0;
 296 }
 297
 298 static int omap_plane_atomic_get_property(struct drm_plane *plane,
 299                                           const struct drm_plane_state *state,
 300                                           struct drm_property *property,
 301                                           uint64_t *val)
 302 {
 303         struct omap_drm_private *priv = plane->dev->dev_private;
 304         const struct omap_plane_state *omap_state =
 305                 container_of(state, const struct omap_plane_state, base);
 306
 307         if (property == priv->zorder_prop)
 308                 *val = omap_state->zorder;
 309         else
 310                 return -EINVAL;
 311
 312         return 0;
 313 }
 314
 315 static const struct drm_plane_funcs omap_plane_funcs = {
 316         .update_plane = drm_atomic_helper_update_plane,
 317         .disable_plane = drm_atomic_helper_disable_plane,
 318         .reset = omap_plane_reset,
 319         .destroy = omap_plane_destroy,
 320         .set_property = drm_atomic_helper_plane_set_property,
 321         .atomic_duplicate_state = omap_plane_atomic_duplicate_state,
 322         .atomic_destroy_state = omap_plane_atomic_destroy_state,
 323         .atomic_set_property = omap_plane_atomic_set_property,
 324         .atomic_get_property = omap_plane_atomic_get_property,
 325 };
 326
 327 static const char *plane_id_to_name[] = {
 328         [OMAP_DSS_GFX] = "gfx",
 329         [OMAP_DSS_VIDEO1] = "vid1",
 330         [OMAP_DSS_VIDEO2] = "vid2",
 331         [OMAP_DSS_VIDEO3] = "vid3",
 332 };
 333
 334 static const enum omap_plane_id plane_idx_to_id[] = {
 335         OMAP_DSS_GFX,
 336         OMAP_DSS_VIDEO1,
 337         OMAP_DSS_VIDEO2,
 338         OMAP_DSS_VIDEO3,
 339 };
 340
 341 /* initialize plane */
 342 struct drm_plane *omap_plane_init(struct drm_device *dev,
 343                 int idx, enum drm_plane_type type,
 344                 u32 possible_crtcs)
 345 {
 346         struct omap_drm_private *priv = dev->dev_private;
 347         struct drm_plane *plane;
 348         struct omap_plane *omap_plane;
 349         enum omap_plane_id id;
 350         int ret;
 351
 352         if (WARN_ON(idx >= ARRAY_SIZE(plane_idx_to_id)))
 353                 return ERR_PTR(-EINVAL);
 354
 355         id = plane_idx_to_id[idx];
 356
 357         DBG("%s: type=%d", plane_id_to_name[id], type);
 358
 359         omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
 360         if (!omap_plane)
 361                 return ERR_PTR(-ENOMEM);
 362
 363         omap_plane->nformats = omap_framebuffer_get_formats(
 364                         omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
 365                         priv->dispc_ops->ovl_get_color_modes(id));
 366         omap_plane->id = id;
 367         omap_plane->name = plane_id_to_name[id];
 368
 369         plane = &omap_plane->base;
 370
 371         ret = drm_universal_plane_init(dev, plane, possible_crtcs,
 372                                        &omap_plane_funcs, omap_plane->formats,
 373                                        omap_plane->nformats, type, NULL);
 374         if (ret < 0)
 375                 goto error;
 376
 377         drm_plane_helper_add(plane, &omap_plane_helper_funcs);
 378
 379         omap_plane_install_properties(plane, &plane->base);
 380
 381         return plane;
 382
 383 error:
 384         dev_err(dev->dev, "%s(): could not create plane: %s\n",
 385                 __func__, plane_id_to_name[id]);
 386
 387         kfree(omap_plane);
 388         return NULL;
 389 }