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/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 /* some hackery because omapdss has an 'enum omap_plane' (which would be
  28  * better named omap_plane_id).. and compiler seems unhappy about having
  29  * both a 'struct omap_plane' and 'enum omap_plane'
  30  */
  31 #define omap_plane _omap_plane
  32
  33 /*
  34  * plane funcs
  35  */
  36
  37 #define to_omap_plane(x) container_of(x, struct omap_plane, base)
  38
  39 struct omap_plane {
  40         struct drm_plane base;
  41         int id;  /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */
  42         const char *name;
  43
  44         uint32_t nformats;
  45         uint32_t formats[32];
  46
  47         struct omap_drm_irq error_irq;
  48 };
  49
  50 struct omap_plane_state {
  51         struct drm_plane_state base;
  52
  53         unsigned int zorder;
  54 };
  55
  56 static inline struct omap_plane_state *
  57 to_omap_plane_state(struct drm_plane_state *state)
  58 {
  59         return container_of(state, struct omap_plane_state, base);
  60 }
  61
  62 static int omap_plane_prepare_fb(struct drm_plane *plane,
  63                                  struct drm_framebuffer *fb,
  64                                  const struct drm_plane_state *new_state)
  65 {
  66         return omap_framebuffer_pin(fb);
  67 }
  68
  69 static void omap_plane_cleanup_fb(struct drm_plane *plane,
  70                                   struct drm_framebuffer *fb,
  71                                   const struct drm_plane_state *old_state)
  72 {
  73         omap_framebuffer_unpin(fb);
  74 }
  75
  76 static void omap_plane_atomic_update(struct drm_plane *plane,
  77                                      struct drm_plane_state *old_state)
  78 {
  79         struct omap_plane *omap_plane = to_omap_plane(plane);
  80         struct drm_plane_state *state = plane->state;
  81         struct omap_plane_state *omap_state = to_omap_plane_state(state);
  82         struct omap_overlay_info info;
  83         struct omap_drm_window win;
  84         int ret;
  85
  86         DBG("%s, crtc=%p fb=%p", omap_plane->name, state->crtc, state->fb);
  87
  88         memset(&info, 0, sizeof(info));
  89         info.rotation_type = OMAP_DSS_ROT_DMA;
  90         info.rotation = OMAP_DSS_ROT_0;
  91         info.global_alpha = 0xff;
  92         info.mirror = 0;
  93         info.zorder = omap_state->zorder;
  94
  95         memset(&win, 0, sizeof(win));
  96         win.rotation = state->rotation;
  97         win.crtc_x = state->crtc_x;
  98         win.crtc_y = state->crtc_y;
  99         win.crtc_w = state->crtc_w;
 100         win.crtc_h = state->crtc_h;
 101
 102         /*
 103          * src values are in Q16 fixed point, convert to integer.
 104          * omap_framebuffer_update_scanout() takes adjusted src.
 105          */
 106         win.src_x = state->src_x >> 16;
 107         win.src_y = state->src_y >> 16;
 108
 109         switch (state->rotation & 0xf) {
 110         case BIT(DRM_ROTATE_90):
 111         case BIT(DRM_ROTATE_270):
 112                 win.src_w = state->src_h >> 16;
 113                 win.src_h = state->src_w >> 16;
 114                 break;
 115         default:
 116                 win.src_w = state->src_w >> 16;
 117                 win.src_h = state->src_h >> 16;
 118                 break;
 119         }
 120
 121         /* update scanout: */
 122         omap_framebuffer_update_scanout(state->fb, &win, &info);
 123
 124         DBG("%dx%d -> %dx%d (%d)", info.width, info.height,
 125                         info.out_width, info.out_height,
 126                         info.screen_width);
 127         DBG("%d,%d %pad %pad", info.pos_x, info.pos_y,
 128                         &info.paddr, &info.p_uv_addr);
 129
 130         dispc_ovl_set_channel_out(omap_plane->id,
 131                                   omap_crtc_channel(state->crtc));
 132
 133         /* and finally, update omapdss: */
 134         ret = dispc_ovl_setup(omap_plane->id, &info, false,
 135                               omap_crtc_timings(state->crtc), false);
 136         if (WARN_ON(ret)) {
 137                 dispc_ovl_enable(omap_plane->id, false);
 138                 return;
 139         }
 140
 141         dispc_ovl_enable(omap_plane->id, true);
 142 }
 143
 144 static void omap_plane_atomic_disable(struct drm_plane *plane,
 145                                       struct drm_plane_state *old_state)
 146 {
 147         struct omap_plane_state *omap_state = to_omap_plane_state(plane->state);
 148         struct omap_plane *omap_plane = to_omap_plane(plane);
 149
 150         plane->state->rotation = BIT(DRM_ROTATE_0);
 151         omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
 152                            ? 0 : omap_plane->id;
 153
 154         dispc_ovl_enable(omap_plane->id, false);
 155 }
 156
 157 static int omap_plane_atomic_check(struct drm_plane *plane,
 158                                    struct drm_plane_state *state)
 159 {
 160         struct drm_crtc_state *crtc_state;
 161
 162         if (!state->crtc)
 163                 return 0;
 164
 165         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 166         if (IS_ERR(crtc_state))
 167                 return PTR_ERR(crtc_state);
 168
 169         if (state->crtc_x < 0 || state->crtc_y < 0)
 170                 return -EINVAL;
 171
 172         if (state->crtc_x + state->crtc_w > crtc_state->adjusted_mode.hdisplay)
 173                 return -EINVAL;
 174
 175         if (state->crtc_y + state->crtc_h > crtc_state->adjusted_mode.vdisplay)
 176                 return -EINVAL;
 177
 178         return 0;
 179 }
 180
 181 static const struct drm_plane_helper_funcs omap_plane_helper_funcs = {
 182         .prepare_fb = omap_plane_prepare_fb,
 183         .cleanup_fb = omap_plane_cleanup_fb,
 184         .atomic_check = omap_plane_atomic_check,
 185         .atomic_update = omap_plane_atomic_update,
 186         .atomic_disable = omap_plane_atomic_disable,
 187 };
 188
 189 static void omap_plane_reset(struct drm_plane *plane)
 190 {
 191         struct omap_plane *omap_plane = to_omap_plane(plane);
 192         struct omap_plane_state *omap_state;
 193
 194         if (plane->state && plane->state->fb)
 195                 drm_framebuffer_unreference(plane->state->fb);
 196
 197         kfree(plane->state);
 198         plane->state = NULL;
 199
 200         omap_state = kzalloc(sizeof(*omap_state), GFP_KERNEL);
 201         if (omap_state == NULL)
 202                 return;
 203
 204         /*
 205          * Set defaults depending on whether we are a primary or overlay
 206          * plane.
 207          */
 208         omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
 209                            ? 0 : omap_plane->id;
 210         omap_state->base.rotation = BIT(DRM_ROTATE_0);
 211
 212         plane->state = &omap_state->base;
 213         plane->state->plane = plane;
 214 }
 215
 216 static void omap_plane_destroy(struct drm_plane *plane)
 217 {
 218         struct omap_plane *omap_plane = to_omap_plane(plane);
 219
 220         DBG("%s", omap_plane->name);
 221
 222         omap_irq_unregister(plane->dev, &omap_plane->error_irq);
 223
 224         drm_plane_cleanup(plane);
 225
 226         kfree(omap_plane);
 227 }
 228
 229 /* helper to install properties which are common to planes and crtcs */
 230 void omap_plane_install_properties(struct drm_plane *plane,
 231                 struct drm_mode_object *obj)
 232 {
 233         struct drm_device *dev = plane->dev;
 234         struct omap_drm_private *priv = dev->dev_private;
 235
 236         if (priv->has_dmm) {
 237                 struct drm_property *prop = dev->mode_config.rotation_property;
 238
 239                 drm_object_attach_property(obj, prop, 0);
 240         }
 241
 242         drm_object_attach_property(obj, priv->zorder_prop, 0);
 243 }
 244
 245 static struct drm_plane_state *
 246 omap_plane_atomic_duplicate_state(struct drm_plane *plane)
 247 {
 248         struct omap_plane_state *state;
 249         struct omap_plane_state *copy;
 250
 251         if (WARN_ON(!plane->state))
 252                 return NULL;
 253
 254         state = to_omap_plane_state(plane->state);
 255         copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
 256         if (copy == NULL)
 257                 return NULL;
 258
 259         __drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
 260
 261         return &copy->base;
 262 }
 263
 264 static void omap_plane_atomic_destroy_state(struct drm_plane *plane,
 265                                             struct drm_plane_state *state)
 266 {
 267         __drm_atomic_helper_plane_destroy_state(plane, state);
 268         kfree(to_omap_plane_state(state));
 269 }
 270
 271 static int omap_plane_atomic_set_property(struct drm_plane *plane,
 272                                           struct drm_plane_state *state,
 273                                           struct drm_property *property,
 274                                           uint64_t val)
 275 {
 276         struct omap_drm_private *priv = plane->dev->dev_private;
 277         struct omap_plane_state *omap_state = to_omap_plane_state(state);
 278
 279         if (property == priv->zorder_prop)
 280                 omap_state->zorder = val;
 281         else
 282                 return -EINVAL;
 283
 284         return 0;
 285 }
 286
 287 static int omap_plane_atomic_get_property(struct drm_plane *plane,
 288                                           const struct drm_plane_state *state,
 289                                           struct drm_property *property,
 290                                           uint64_t *val)
 291 {
 292         struct omap_drm_private *priv = plane->dev->dev_private;
 293         const struct omap_plane_state *omap_state =
 294                 container_of(state, const struct omap_plane_state, base);
 295
 296         if (property == priv->zorder_prop)
 297                 *val = omap_state->zorder;
 298         else
 299                 return -EINVAL;
 300
 301         return 0;
 302 }
 303
 304 static const struct drm_plane_funcs omap_plane_funcs = {
 305         .update_plane = drm_atomic_helper_update_plane,
 306         .disable_plane = drm_atomic_helper_disable_plane,
 307         .reset = omap_plane_reset,
 308         .destroy = omap_plane_destroy,
 309         .set_property = drm_atomic_helper_plane_set_property,
 310         .atomic_duplicate_state = omap_plane_atomic_duplicate_state,
 311         .atomic_destroy_state = omap_plane_atomic_destroy_state,
 312         .atomic_set_property = omap_plane_atomic_set_property,
 313         .atomic_get_property = omap_plane_atomic_get_property,
 314 };
 315
 316 static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
 317 {
 318         struct omap_plane *omap_plane =
 319                         container_of(irq, struct omap_plane, error_irq);
 320         DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_plane->name,
 321                 irqstatus);
 322 }
 323
 324 static const char *plane_names[] = {
 325         [OMAP_DSS_GFX] = "gfx",
 326         [OMAP_DSS_VIDEO1] = "vid1",
 327         [OMAP_DSS_VIDEO2] = "vid2",
 328         [OMAP_DSS_VIDEO3] = "vid3",
 329 };
 330
 331 static const uint32_t error_irqs[] = {
 332         [OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW,
 333         [OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW,
 334         [OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW,
 335         [OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW,
 336 };
 337
 338 /* initialize plane */
 339 struct drm_plane *omap_plane_init(struct drm_device *dev,
 340                 int id, enum drm_plane_type type)
 341 {
 342         struct omap_drm_private *priv = dev->dev_private;
 343         struct drm_plane *plane;
 344         struct omap_plane *omap_plane;
 345         int ret;
 346
 347         DBG("%s: type=%d", plane_names[id], type);
 348
 349         omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
 350         if (!omap_plane)
 351                 return ERR_PTR(-ENOMEM);
 352
 353         omap_plane->nformats = omap_framebuffer_get_formats(
 354                         omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
 355                         dss_feat_get_supported_color_modes(id));
 356         omap_plane->id = id;
 357         omap_plane->name = plane_names[id];
 358
 359         plane = &omap_plane->base;
 360
 361         omap_plane->error_irq.irqmask = error_irqs[id];
 362         omap_plane->error_irq.irq = omap_plane_error_irq;
 363         omap_irq_register(dev, &omap_plane->error_irq);
 364
 365         ret = drm_universal_plane_init(dev, plane, (1 << priv->num_crtcs) - 1,
 366                                        &omap_plane_funcs, omap_plane->formats,
 367                                        omap_plane->nformats, type);
 368         if (ret < 0)
 369                 goto error;
 370
 371         drm_plane_helper_add(plane, &omap_plane_helper_funcs);
 372
 373         omap_plane_install_properties(plane, &plane->base);
 374
 375         return plane;
 376
 377 error:
 378         omap_irq_unregister(plane->dev, &omap_plane->error_irq);
 379         kfree(omap_plane);
 380         return NULL;
 381 }