drivers/gpu/drm/omapdrm/omap_plane.c

   1 /*
   2  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   3  * Author: Rob Clark <rob.clark@linaro.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <drm/drm_atomic.h>
  19 #include <drm/drm_atomic_helper.h>
  20 #include <drm/drm_plane_helper.h>
  21
  22 #include "omap_dmm_tiler.h"
  23 #include "omap_drv.h"
  24
  25 /*
  26  * plane funcs
  27  */
  28
  29 #define to_omap_plane(x) container_of(x, struct omap_plane, base)
  30
  31 struct omap_plane {
  32         struct drm_plane base;
  33         enum omap_plane_id id;
  34         const char *name;
  35 };
  36
  37 static int omap_plane_prepare_fb(struct drm_plane *plane,
  38                                  struct drm_plane_state *new_state)
  39 {
  40         if (!new_state->fb)
  41                 return 0;
  42
  43         return omap_framebuffer_pin(new_state->fb);
  44 }
  45
  46 static void omap_plane_cleanup_fb(struct drm_plane *plane,
  47                                   struct drm_plane_state *old_state)
  48 {
  49         if (old_state->fb)
  50                 omap_framebuffer_unpin(old_state->fb);
  51 }
  52
  53 static void omap_plane_atomic_update(struct drm_plane *plane,
  54                                      struct drm_plane_state *old_state)
  55 {
  56         struct omap_drm_private *priv = plane->dev->dev_private;
  57         struct omap_plane *omap_plane = to_omap_plane(plane);
  58         struct drm_plane_state *state = plane->state;
  59         struct omap_overlay_info info;
  60         int ret;
  61
  62         DBG("%s, crtc=%p fb=%p", omap_plane->name, state->crtc, state->fb);
  63
  64         memset(&info, 0, sizeof(info));
  65         info.rotation_type = OMAP_DSS_ROT_NONE;
  66         info.rotation = DRM_MODE_ROTATE_0;
  67         info.global_alpha = 0xff;
  68         info.zorder = state->zpos;
  69
  70         /* update scanout: */
  71         omap_framebuffer_update_scanout(state->fb, state, &info);
  72
  73         DBG("%dx%d -> %dx%d (%d)", info.width, info.height,
  74                         info.out_width, info.out_height,
  75                         info.screen_width);
  76         DBG("%d,%d %pad %pad", info.pos_x, info.pos_y,
  77                         &info.paddr, &info.p_uv_addr);
  78
  79         /* and finally, update omapdss: */
  80         ret = priv->dispc_ops->ovl_setup(omap_plane->id, &info,
  81                               omap_crtc_timings(state->crtc), false,
  82                               omap_crtc_channel(state->crtc));
  83         if (ret) {
  84                 dev_err(plane->dev->dev, "Failed to setup plane %s\n",
  85                         omap_plane->name);
  86                 priv->dispc_ops->ovl_enable(omap_plane->id, false);
  87                 return;
  88         }
  89
  90         priv->dispc_ops->ovl_enable(omap_plane->id, true);
  91 }
  92
  93 static void omap_plane_atomic_disable(struct drm_plane *plane,
  94                                       struct drm_plane_state *old_state)
  95 {
  96         struct omap_drm_private *priv = plane->dev->dev_private;
  97         struct omap_plane *omap_plane = to_omap_plane(plane);
  98
  99         plane->state->rotation = DRM_MODE_ROTATE_0;
 100         plane->state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY
 101                            ? 0 : omap_plane->id;
 102
 103         priv->dispc_ops->ovl_enable(omap_plane->id, false);
 104 }
 105
 106 static int omap_plane_atomic_check(struct drm_plane *plane,
 107                                    struct drm_plane_state *state)
 108 {
 109         struct drm_crtc_state *crtc_state;
 110
 111         if (!state->fb)
 112                 return 0;
 113
 114         /* crtc should only be NULL when disabling (i.e., !state->fb) */
 115         if (WARN_ON(!state->crtc))
 116                 return 0;
 117
 118         crtc_state = drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 119         /* we should have a crtc state if the plane is attached to a crtc */
 120         if (WARN_ON(!crtc_state))
 121                 return 0;
 122
 123         if (!crtc_state->enable)
 124                 return 0;
 125
 126         if (state->crtc_x < 0 || state->crtc_y < 0)
 127                 return -EINVAL;
 128
 129         if (state->crtc_x + state->crtc_w > crtc_state->adjusted_mode.hdisplay)
 130                 return -EINVAL;
 131
 132         if (state->crtc_y + state->crtc_h > crtc_state->adjusted_mode.vdisplay)
 133                 return -EINVAL;
 134
 135         if (state->rotation != DRM_MODE_ROTATE_0 &&
 136             !omap_framebuffer_supports_rotation(state->fb))
 137                 return -EINVAL;
 138
 139         return 0;
 140 }
 141
 142 static const struct drm_plane_helper_funcs omap_plane_helper_funcs = {
 143         .prepare_fb = omap_plane_prepare_fb,
 144         .cleanup_fb = omap_plane_cleanup_fb,
 145         .atomic_check = omap_plane_atomic_check,
 146         .atomic_update = omap_plane_atomic_update,
 147         .atomic_disable = omap_plane_atomic_disable,
 148 };
 149
 150 static void omap_plane_destroy(struct drm_plane *plane)
 151 {
 152         struct omap_plane *omap_plane = to_omap_plane(plane);
 153
 154         DBG("%s", omap_plane->name);
 155
 156         drm_plane_cleanup(plane);
 157
 158         kfree(omap_plane);
 159 }
 160
 161 /* helper to install properties which are common to planes and crtcs */
 162 void omap_plane_install_properties(struct drm_plane *plane,
 163                 struct drm_mode_object *obj)
 164 {
 165         struct drm_device *dev = plane->dev;
 166         struct omap_drm_private *priv = dev->dev_private;
 167
 168         if (priv->has_dmm) {
 169                 if (!plane->rotation_property)
 170                         drm_plane_create_rotation_property(plane,
 171                                                            DRM_MODE_ROTATE_0,
 172                                                            DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 |
 173                                                            DRM_MODE_ROTATE_180 | DRM_MODE_ROTATE_270 |
 174                                                            DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y);
 175
 176                 /* Attach the rotation property also to the crtc object */
 177                 if (plane->rotation_property && obj != &plane->base)
 178                         drm_object_attach_property(obj, plane->rotation_property,
 179                                                    DRM_MODE_ROTATE_0);
 180         }
 181
 182         drm_object_attach_property(obj, priv->zorder_prop, 0);
 183 }
 184
 185 static void omap_plane_reset(struct drm_plane *plane)
 186 {
 187         struct omap_plane *omap_plane = to_omap_plane(plane);
 188
 189         drm_atomic_helper_plane_reset(plane);
 190         if (!plane->state)
 191                 return;
 192
 193         /*
 194          * Set the zpos default depending on whether we are a primary or overlay
 195          * plane.
 196          */
 197         plane->state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY
 198                            ? 0 : omap_plane->id;
 199 }
 200
 201 static int omap_plane_atomic_set_property(struct drm_plane *plane,
 202                                           struct drm_plane_state *state,
 203                                           struct drm_property *property,
 204                                           uint64_t val)
 205 {
 206         struct omap_drm_private *priv = plane->dev->dev_private;
 207
 208         if (property == priv->zorder_prop)
 209                 state->zpos = val;
 210         else
 211                 return -EINVAL;
 212
 213         return 0;
 214 }
 215
 216 static int omap_plane_atomic_get_property(struct drm_plane *plane,
 217                                           const struct drm_plane_state *state,
 218                                           struct drm_property *property,
 219                                           uint64_t *val)
 220 {
 221         struct omap_drm_private *priv = plane->dev->dev_private;
 222
 223         if (property == priv->zorder_prop)
 224                 *val = state->zpos;
 225         else
 226                 return -EINVAL;
 227
 228         return 0;
 229 }
 230
 231 static const struct drm_plane_funcs omap_plane_funcs = {
 232         .update_plane = drm_atomic_helper_update_plane,
 233         .disable_plane = drm_atomic_helper_disable_plane,
 234         .reset = omap_plane_reset,
 235         .destroy = omap_plane_destroy,
 236         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 237         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 238         .atomic_set_property = omap_plane_atomic_set_property,
 239         .atomic_get_property = omap_plane_atomic_get_property,
 240 };
 241
 242 static const char *plane_id_to_name[] = {
 243         [OMAP_DSS_GFX] = "gfx",
 244         [OMAP_DSS_VIDEO1] = "vid1",
 245         [OMAP_DSS_VIDEO2] = "vid2",
 246         [OMAP_DSS_VIDEO3] = "vid3",
 247 };
 248
 249 static const enum omap_plane_id plane_idx_to_id[] = {
 250         OMAP_DSS_GFX,
 251         OMAP_DSS_VIDEO1,
 252         OMAP_DSS_VIDEO2,
 253         OMAP_DSS_VIDEO3,
 254 };
 255
 256 /* initialize plane */
 257 struct drm_plane *omap_plane_init(struct drm_device *dev,
 258                 int idx, enum drm_plane_type type,
 259                 u32 possible_crtcs)
 260 {
 261         struct omap_drm_private *priv = dev->dev_private;
 262         unsigned int num_planes = priv->dispc_ops->get_num_ovls();
 263         struct drm_plane *plane;
 264         struct omap_plane *omap_plane;
 265         enum omap_plane_id id;
 266         int ret;
 267         u32 nformats;
 268         const u32 *formats;
 269
 270         if (WARN_ON(idx >= ARRAY_SIZE(plane_idx_to_id)))
 271                 return ERR_PTR(-EINVAL);
 272
 273         id = plane_idx_to_id[idx];
 274
 275         DBG("%s: type=%d", plane_id_to_name[id], type);
 276
 277         omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
 278         if (!omap_plane)
 279                 return ERR_PTR(-ENOMEM);
 280
 281         formats = priv->dispc_ops->ovl_get_color_modes(id);
 282         for (nformats = 0; formats[nformats]; ++nformats)
 283                 ;
 284         omap_plane->id = id;
 285         omap_plane->name = plane_id_to_name[id];
 286
 287         plane = &omap_plane->base;
 288
 289         ret = drm_universal_plane_init(dev, plane, possible_crtcs,
 290                                        &omap_plane_funcs, formats,
 291                                        nformats, NULL, type, NULL);
 292         if (ret < 0)
 293                 goto error;
 294
 295         drm_plane_helper_add(plane, &omap_plane_helper_funcs);
 296
 297         omap_plane_install_properties(plane, &plane->base);
 298         drm_plane_create_zpos_property(plane, 0, 0, num_planes - 1);
 299
 300         return plane;
 301
 302 error:
 303         dev_err(dev->dev, "%s(): could not create plane: %s\n",
 304                 __func__, plane_id_to_name[id]);
 305
 306         kfree(omap_plane);
 307         return NULL;
 308 }