Pileus Git - ~andy/linux/blob - drivers/staging/omapdrm/omap_plane.c

   1 /*
   2  * drivers/staging/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 "omap_drv.h"
  21
  22 /* some hackery because omapdss has an 'enum omap_plane' (which would be
  23  * better named omap_plane_id).. and compiler seems unhappy about having
  24  * both a 'struct omap_plane' and 'enum omap_plane'
  25  */
  26 #define omap_plane _omap_plane
  27
  28 /*
  29  * plane funcs
  30  */
  31
  32 #define to_omap_plane(x) container_of(x, struct omap_plane, base)
  33
  34 struct omap_plane {
  35         struct drm_plane base;
  36         struct omap_overlay *ovl;
  37         struct omap_overlay_info info;
  38
  39         /* Source values, converted to integers because we don't support
  40          * fractional positions:
  41          */
  42         unsigned int src_x, src_y;
  43
  44         /* last fb that we pinned: */
  45         struct drm_framebuffer *pinned_fb;
  46 };
  47
  48
  49 /* push changes down to dss2 */
  50 static int commit(struct drm_plane *plane)
  51 {
  52         struct drm_device *dev = plane->dev;
  53         struct omap_plane *omap_plane = to_omap_plane(plane);
  54         struct omap_overlay *ovl = omap_plane->ovl;
  55         struct omap_overlay_info *info = &omap_plane->info;
  56         int ret;
  57
  58         DBG("%s", ovl->name);
  59         DBG("%dx%d -> %dx%d (%d)", info->width, info->height, info->out_width,
  60                         info->out_height, info->screen_width);
  61         DBG("%d,%d %08x %08x", info->pos_x, info->pos_y,
  62                         info->paddr, info->p_uv_addr);
  63
  64         /* NOTE: do we want to do this at all here, or just wait
  65          * for dpms(ON) since other CRTC's may not have their mode
  66          * set yet, so fb dimensions may still change..
  67          */
  68         ret = ovl->set_overlay_info(ovl, info);
  69         if (ret) {
  70                 dev_err(dev->dev, "could not set overlay info\n");
  71                 return ret;
  72         }
  73
  74         /* our encoder doesn't necessarily get a commit() after this, in
  75          * particular in the dpms() and mode_set_base() cases, so force the
  76          * manager to update:
  77          *
  78          * could this be in the encoder somehow?
  79          */
  80         if (ovl->manager) {
  81                 ret = ovl->manager->apply(ovl->manager);
  82                 if (ret) {
  83                         dev_err(dev->dev, "could not apply settings\n");
  84                         return ret;
  85                 }
  86         }
  87
  88         if (info->enabled) {
  89                 omap_framebuffer_flush(plane->fb, info->pos_x, info->pos_y,
  90                                 info->out_width, info->out_height);
  91         }
  92
  93         return 0;
  94 }
  95
  96 /* when CRTC that we are attached to has potentially changed, this checks
  97  * if we are attached to proper manager, and if necessary updates.
  98  */
  99 static void update_manager(struct drm_plane *plane)
 100 {
 101         struct omap_drm_private *priv = plane->dev->dev_private;
 102         struct omap_plane *omap_plane = to_omap_plane(plane);
 103         struct omap_overlay *ovl = omap_plane->ovl;
 104         struct omap_overlay_manager *mgr = NULL;
 105         int i;
 106
 107         if (plane->crtc) {
 108                 for (i = 0; i < priv->num_encoders; i++) {
 109                         struct drm_encoder *encoder = priv->encoders[i];
 110                         if (encoder->crtc == plane->crtc) {
 111                                 mgr = omap_encoder_get_manager(encoder);
 112                                 break;
 113                         }
 114                 }
 115         }
 116
 117         if (ovl->manager != mgr) {
 118                 bool enabled = omap_plane->info.enabled;
 119
 120                 /* don't switch things around with enabled overlays: */
 121                 if (enabled)
 122                         omap_plane_dpms(plane, DRM_MODE_DPMS_OFF);
 123
 124                 if (ovl->manager) {
 125                         DBG("disconnecting %s from %s", ovl->name,
 126                                         ovl->manager->name);
 127                         ovl->unset_manager(ovl);
 128                 }
 129
 130                 if (mgr) {
 131                         DBG("connecting %s to %s", ovl->name, mgr->name);
 132                         ovl->set_manager(ovl, mgr);
 133                 }
 134
 135                 if (enabled && mgr)
 136                         omap_plane_dpms(plane, DRM_MODE_DPMS_ON);
 137         }
 138 }
 139
 140 /* update which fb (if any) is pinned for scanout */
 141 static int update_pin(struct drm_plane *plane, struct drm_framebuffer *fb)
 142 {
 143         struct omap_plane *omap_plane = to_omap_plane(plane);
 144         int ret = 0;
 145
 146         if (omap_plane->pinned_fb != fb) {
 147                 if (omap_plane->pinned_fb)
 148                         omap_framebuffer_unpin(omap_plane->pinned_fb);
 149                 omap_plane->pinned_fb = fb;
 150                 if (fb)
 151                         ret = omap_framebuffer_pin(fb);
 152         }
 153
 154         return ret;
 155 }
 156
 157 /* update parameters that are dependent on the framebuffer dimensions and
 158  * position within the fb that this plane scans out from. This is called
 159  * when framebuffer or x,y base may have changed.
 160  */
 161 static void update_scanout(struct drm_plane *plane)
 162 {
 163         struct omap_plane *omap_plane = to_omap_plane(plane);
 164         struct omap_overlay_info *info = &omap_plane->info;
 165         int ret;
 166
 167         ret = update_pin(plane, plane->fb);
 168         if (ret) {
 169                 dev_err(plane->dev->dev,
 170                         "could not pin fb: %d\n", ret);
 171                 omap_plane->info.enabled = false;
 172         }
 173
 174         omap_framebuffer_update_scanout(plane->fb,
 175                         omap_plane->src_x, omap_plane->src_y, info);
 176
 177         DBG("%s: %d,%d: %08x %08x (%d)", omap_plane->ovl->name,
 178                         omap_plane->src_x, omap_plane->src_y,
 179                         (u32)info->paddr, (u32)info->p_uv_addr,
 180                         info->screen_width);
 181 }
 182
 183 static int omap_plane_update(struct drm_plane *plane,
 184                 struct drm_crtc *crtc, struct drm_framebuffer *fb,
 185                 int crtc_x, int crtc_y,
 186                 unsigned int crtc_w, unsigned int crtc_h,
 187                 uint32_t src_x, uint32_t src_y,
 188                 uint32_t src_w, uint32_t src_h)
 189 {
 190         struct omap_plane *omap_plane = to_omap_plane(plane);
 191
 192         /* src values are in Q16 fixed point, convert to integer: */
 193         src_x = src_x >> 16;
 194         src_y = src_y >> 16;
 195         src_w = src_w >> 16;
 196         src_h = src_h >> 16;
 197
 198         omap_plane->info.enabled = true;
 199         omap_plane->info.pos_x = crtc_x;
 200         omap_plane->info.pos_y = crtc_y;
 201         omap_plane->info.out_width = crtc_w;
 202         omap_plane->info.out_height = crtc_h;
 203         omap_plane->info.width = src_w;
 204         omap_plane->info.height = src_h;
 205         omap_plane->src_x = src_x;
 206         omap_plane->src_y = src_y;
 207
 208         /* note: this is done after this fxn returns.. but if we need
 209          * to do a commit/update_scanout, etc before this returns we
 210          * need the current value.
 211          */
 212         plane->fb = fb;
 213         plane->crtc = crtc;
 214
 215         update_scanout(plane);
 216         update_manager(plane);
 217         commit(plane);
 218
 219         return 0;
 220 }
 221
 222 static int omap_plane_disable(struct drm_plane *plane)
 223 {
 224         return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF);
 225 }
 226
 227 static void omap_plane_destroy(struct drm_plane *plane)
 228 {
 229         struct omap_plane *omap_plane = to_omap_plane(plane);
 230         DBG("%s", omap_plane->ovl->name);
 231         omap_plane_disable(plane);
 232         drm_plane_cleanup(plane);
 233         kfree(omap_plane);
 234 }
 235
 236 int omap_plane_dpms(struct drm_plane *plane, int mode)
 237 {
 238         struct omap_plane *omap_plane = to_omap_plane(plane);
 239
 240         DBG("%s: %d", omap_plane->ovl->name, mode);
 241
 242         if (mode == DRM_MODE_DPMS_ON) {
 243                 update_scanout(plane);
 244                 omap_plane->info.enabled = true;
 245         } else {
 246                 omap_plane->info.enabled = false;
 247                 update_pin(plane, NULL);
 248         }
 249
 250         return commit(plane);
 251 }
 252
 253 static const struct drm_plane_funcs omap_plane_funcs = {
 254                 .update_plane = omap_plane_update,
 255                 .disable_plane = omap_plane_disable,
 256                 .destroy = omap_plane_destroy,
 257 };
 258
 259 static const uint32_t formats[] = {
 260                 DRM_FORMAT_RGB565,
 261                 DRM_FORMAT_RGBX4444,
 262                 DRM_FORMAT_XRGB4444,
 263                 DRM_FORMAT_RGBA4444,
 264                 DRM_FORMAT_ABGR4444,
 265                 DRM_FORMAT_XRGB1555,
 266                 DRM_FORMAT_ARGB1555,
 267                 DRM_FORMAT_RGB888,
 268                 DRM_FORMAT_RGBX8888,
 269                 DRM_FORMAT_XRGB8888,
 270                 DRM_FORMAT_RGBA8888,
 271                 DRM_FORMAT_ARGB8888,
 272                 DRM_FORMAT_NV12,
 273                 DRM_FORMAT_YUYV,
 274                 DRM_FORMAT_UYVY,
 275 };
 276
 277 /* initialize plane */
 278 struct drm_plane *omap_plane_init(struct drm_device *dev,
 279                 struct omap_overlay *ovl, unsigned int possible_crtcs,
 280                 bool priv)
 281 {
 282         struct drm_plane *plane = NULL;
 283         struct omap_plane *omap_plane;
 284
 285         DBG("%s: possible_crtcs=%08x, priv=%d", ovl->name,
 286                         possible_crtcs, priv);
 287
 288         omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
 289         if (!omap_plane) {
 290                 dev_err(dev->dev, "could not allocate plane\n");
 291                 goto fail;
 292         }
 293
 294         omap_plane->ovl = ovl;
 295         plane = &omap_plane->base;
 296
 297         drm_plane_init(dev, plane, possible_crtcs, &omap_plane_funcs,
 298                         formats, ARRAY_SIZE(formats), priv);
 299
 300         /* get our starting configuration, set defaults for parameters
 301          * we don't currently use, etc:
 302          */
 303         ovl->get_overlay_info(ovl, &omap_plane->info);
 304         omap_plane->info.rotation_type = OMAP_DSS_ROT_DMA;
 305         omap_plane->info.rotation = OMAP_DSS_ROT_0;
 306         omap_plane->info.global_alpha = 0xff;
 307         omap_plane->info.mirror = 0;
 308         omap_plane->info.mirror = 0;
 309
 310         /* Set defaults depending on whether we are a CRTC or overlay
 311          * layer.
 312          * TODO add ioctl to give userspace an API to change this.. this
 313          * will come in a subsequent patch.
 314          */
 315         if (priv)
 316                 omap_plane->info.zorder = 0;
 317         else
 318                 omap_plane->info.zorder = 1;
 319
 320         update_manager(plane);
 321
 322         return plane;
 323
 324 fail:
 325         if (plane) {
 326                 omap_plane_destroy(plane);
 327         }
 328         return NULL;
 329 }