LXR linux/drivers/gpu/drm/omapdrm/omap

   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
  31struct omap_plane {
  32        struct drm_plane base;
  33        enum omap_plane_id id;
  34        const char *name;
  35};
  36
  37static 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
  46static 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
  53static 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->normalized_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(priv->dispc, 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(priv->dispc, omap_plane->id, false);
  87                return;
  88        }
  89
  90        priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, true);
  91}
  92
  93static 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(priv->dispc, omap_plane->id, false);
 104}
 105
 106static 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
 142static 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
 150static 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 */
 162void 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
 185static 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
 201static int omap_plane_atomic_set_property(struct drm_plane *plane,
 202                                          struct drm_plane_state *state,
 203                                          struct drm_property *property,
 204                                          u64 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
 216static int omap_plane_atomic_get_property(struct drm_plane *plane,
 217                                          const struct drm_plane_state *state,
 218                                          struct drm_property *property,
 219                                          u64 *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
 231static 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
 242static 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
 249static 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 */
 257struct 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(priv->dispc);
 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(priv->dispc, 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
 302error:
 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}
 309