drivers/gpu/drm/omapdrm/omap_fb.c

   1 /*
   2  * drivers/gpu/drm/omapdrm/omap_fb.c
   3  *
   4  * Copyright (C) 2011 Texas Instruments
   5  * Author: Rob Clark <rob@ti.com>
   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 <linux/seq_file.h>
  21
  22 #include <drm/drm_crtc.h>
  23 #include <drm/drm_crtc_helper.h>
  24
  25 #include "omap_dmm_tiler.h"
  26 #include "omap_drv.h"
  27
  28 /*
  29  * framebuffer funcs
  30  */
  31
  32 /* DSS to DRM formats mapping */
  33 static const struct {
  34         enum omap_color_mode dss_format;
  35         uint32_t pixel_format;
  36 } formats[] = {
  37         /* 16bpp [A]RGB: */
  38         { OMAP_DSS_COLOR_RGB16,       DRM_FORMAT_RGB565 },   /* RGB16-565 */
  39         { OMAP_DSS_COLOR_RGB12U,      DRM_FORMAT_RGBX4444 }, /* RGB12x-4444 */
  40         { OMAP_DSS_COLOR_RGBX16,      DRM_FORMAT_XRGB4444 }, /* xRGB12-4444 */
  41         { OMAP_DSS_COLOR_RGBA16,      DRM_FORMAT_RGBA4444 }, /* RGBA12-4444 */
  42         { OMAP_DSS_COLOR_ARGB16,      DRM_FORMAT_ARGB4444 }, /* ARGB16-4444 */
  43         { OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555 }, /* xRGB15-1555 */
  44         { OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555 }, /* ARGB16-1555 */
  45         /* 24bpp RGB: */
  46         { OMAP_DSS_COLOR_RGB24P,      DRM_FORMAT_RGB888 },   /* RGB24-888 */
  47         /* 32bpp [A]RGB: */
  48         { OMAP_DSS_COLOR_RGBX32,      DRM_FORMAT_RGBX8888 }, /* RGBx24-8888 */
  49         { OMAP_DSS_COLOR_RGB24U,      DRM_FORMAT_XRGB8888 }, /* xRGB24-8888 */
  50         { OMAP_DSS_COLOR_RGBA32,      DRM_FORMAT_RGBA8888 }, /* RGBA32-8888 */
  51         { OMAP_DSS_COLOR_ARGB32,      DRM_FORMAT_ARGB8888 }, /* ARGB32-8888 */
  52         /* YUV: */
  53         { OMAP_DSS_COLOR_NV12,        DRM_FORMAT_NV12 },
  54         { OMAP_DSS_COLOR_YUV2,        DRM_FORMAT_YUYV },
  55         { OMAP_DSS_COLOR_UYVY,        DRM_FORMAT_UYVY },
  56 };
  57
  58 /* convert from overlay's pixel formats bitmask to an array of fourcc's */
  59 uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
  60                 uint32_t max_formats, enum omap_color_mode supported_modes)
  61 {
  62         uint32_t nformats = 0;
  63         int i = 0;
  64
  65         for (i = 0; i < ARRAY_SIZE(formats) && nformats < max_formats; i++)
  66                 if (formats[i].dss_format & supported_modes)
  67                         pixel_formats[nformats++] = formats[i].pixel_format;
  68
  69         return nformats;
  70 }
  71
  72 /* per-plane info for the fb: */
  73 struct plane {
  74         struct drm_gem_object *bo;
  75         uint32_t pitch;
  76         uint32_t offset;
  77         dma_addr_t paddr;
  78 };
  79
  80 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  81
  82 struct omap_framebuffer {
  83         struct drm_framebuffer base;
  84         int pin_count;
  85         const struct drm_format_info *format;
  86         enum omap_color_mode dss_format;
  87         struct plane planes[2];
  88         /* lock for pinning (pin_count and planes.paddr) */
  89         struct mutex lock;
  90 };
  91
  92 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  93                 struct drm_file *file_priv,
  94                 unsigned int *handle)
  95 {
  96         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  97         return drm_gem_handle_create(file_priv,
  98                         omap_fb->planes[0].bo, handle);
  99 }
 100
 101 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
 102 {
 103         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 104         int i, n = fb->format->num_planes;
 105
 106         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
 107
 108         drm_framebuffer_cleanup(fb);
 109
 110         for (i = 0; i < n; i++) {
 111                 struct plane *plane = &omap_fb->planes[i];
 112
 113                 drm_gem_object_unreference_unlocked(plane->bo);
 114         }
 115
 116         kfree(omap_fb);
 117 }
 118
 119 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 120         .create_handle = omap_framebuffer_create_handle,
 121         .destroy = omap_framebuffer_destroy,
 122 };
 123
 124 static uint32_t get_linear_addr(struct plane *plane,
 125                 const struct drm_format_info *format, int n, int x, int y)
 126 {
 127         uint32_t offset;
 128
 129         offset = plane->offset
 130                + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
 131                + (y * plane->pitch / (n == 0 ? 1 : format->vsub));
 132
 133         return plane->paddr + offset;
 134 }
 135
 136 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 137 {
 138         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 139         struct plane *plane = &omap_fb->planes[0];
 140
 141         return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
 142 }
 143
 144 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 145  */
 146 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 147                 struct omap_drm_window *win, struct omap_overlay_info *info)
 148 {
 149         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 150         const struct drm_format_info *format = omap_fb->format;
 151         struct plane *plane = &omap_fb->planes[0];
 152         uint32_t x, y, orient = 0;
 153
 154         info->color_mode = omap_fb->dss_format;
 155
 156         info->pos_x      = win->crtc_x;
 157         info->pos_y      = win->crtc_y;
 158         info->out_width  = win->crtc_w;
 159         info->out_height = win->crtc_h;
 160         info->width      = win->src_w;
 161         info->height     = win->src_h;
 162
 163         x = win->src_x;
 164         y = win->src_y;
 165
 166         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 167                 uint32_t w = win->src_w;
 168                 uint32_t h = win->src_h;
 169
 170                 switch (win->rotation & DRM_ROTATE_MASK) {
 171                 default:
 172                         dev_err(fb->dev->dev, "invalid rotation: %02x",
 173                                         (uint32_t)win->rotation);
 174                         /* fallthru to default to no rotation */
 175                 case 0:
 176                 case DRM_ROTATE_0:
 177                         orient = 0;
 178                         break;
 179                 case DRM_ROTATE_90:
 180                         orient = MASK_XY_FLIP | MASK_X_INVERT;
 181                         break;
 182                 case DRM_ROTATE_180:
 183                         orient = MASK_X_INVERT | MASK_Y_INVERT;
 184                         break;
 185                 case DRM_ROTATE_270:
 186                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
 187                         break;
 188                 }
 189
 190                 if (win->rotation & DRM_REFLECT_X)
 191                         orient ^= MASK_X_INVERT;
 192
 193                 if (win->rotation & DRM_REFLECT_Y)
 194                         orient ^= MASK_Y_INVERT;
 195
 196                 /* adjust x,y offset for flip/invert: */
 197                 if (orient & MASK_XY_FLIP)
 198                         swap(w, h);
 199                 if (orient & MASK_Y_INVERT)
 200                         y += h - 1;
 201                 if (orient & MASK_X_INVERT)
 202                         x += w - 1;
 203
 204                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
 205                 info->rotation_type = OMAP_DSS_ROT_TILER;
 206                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 207         } else {
 208                 switch (win->rotation & DRM_ROTATE_MASK) {
 209                 case 0:
 210                 case DRM_ROTATE_0:
 211                         /* OK */
 212                         break;
 213
 214                 default:
 215                         dev_warn(fb->dev->dev,
 216                                 "rotation '%d' ignored for non-tiled fb\n",
 217                                 win->rotation);
 218                         win->rotation = 0;
 219                         break;
 220                 }
 221
 222                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 223                 info->rotation_type = OMAP_DSS_ROT_DMA;
 224                 info->screen_width  = plane->pitch;
 225         }
 226
 227         /* convert to pixels: */
 228         info->screen_width /= format->cpp[0];
 229
 230         if (omap_fb->dss_format == OMAP_DSS_COLOR_NV12) {
 231                 plane = &omap_fb->planes[1];
 232
 233                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 234                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 235                         omap_gem_rotated_paddr(plane->bo, orient,
 236                                         x/2, y/2, &info->p_uv_addr);
 237                 } else {
 238                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 239                 }
 240         } else {
 241                 info->p_uv_addr = 0;
 242         }
 243 }
 244
 245 /* pin, prepare for scanout: */
 246 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 247 {
 248         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 249         int ret, i, n = fb->format->num_planes;
 250
 251         mutex_lock(&omap_fb->lock);
 252
 253         if (omap_fb->pin_count > 0) {
 254                 omap_fb->pin_count++;
 255                 mutex_unlock(&omap_fb->lock);
 256                 return 0;
 257         }
 258
 259         for (i = 0; i < n; i++) {
 260                 struct plane *plane = &omap_fb->planes[i];
 261                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 262                 if (ret)
 263                         goto fail;
 264                 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
 265         }
 266
 267         omap_fb->pin_count++;
 268
 269         mutex_unlock(&omap_fb->lock);
 270
 271         return 0;
 272
 273 fail:
 274         for (i--; i >= 0; i--) {
 275                 struct plane *plane = &omap_fb->planes[i];
 276                 omap_gem_put_paddr(plane->bo);
 277                 plane->paddr = 0;
 278         }
 279
 280         mutex_unlock(&omap_fb->lock);
 281
 282         return ret;
 283 }
 284
 285 /* unpin, no longer being scanned out: */
 286 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 287 {
 288         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 289         int i, n = fb->format->num_planes;
 290
 291         mutex_lock(&omap_fb->lock);
 292
 293         omap_fb->pin_count--;
 294
 295         if (omap_fb->pin_count > 0) {
 296                 mutex_unlock(&omap_fb->lock);
 297                 return;
 298         }
 299
 300         for (i = 0; i < n; i++) {
 301                 struct plane *plane = &omap_fb->planes[i];
 302                 omap_gem_put_paddr(plane->bo);
 303                 plane->paddr = 0;
 304         }
 305
 306         mutex_unlock(&omap_fb->lock);
 307 }
 308
 309 /* iterate thru all the connectors, returning ones that are attached
 310  * to the same fb..
 311  */
 312 struct drm_connector *omap_framebuffer_get_next_connector(
 313                 struct drm_framebuffer *fb, struct drm_connector *from)
 314 {
 315         struct drm_device *dev = fb->dev;
 316         struct list_head *connector_list = &dev->mode_config.connector_list;
 317         struct drm_connector *connector = from;
 318
 319         if (!from)
 320                 return list_first_entry_or_null(connector_list, typeof(*from),
 321                                                 head);
 322
 323         list_for_each_entry_from(connector, connector_list, head) {
 324                 if (connector != from) {
 325                         struct drm_encoder *encoder = connector->encoder;
 326                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 327                         if (crtc && crtc->primary->fb == fb)
 328                                 return connector;
 329
 330                 }
 331         }
 332
 333         return NULL;
 334 }
 335
 336 #ifdef CONFIG_DEBUG_FS
 337 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 338 {
 339         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 340         int i, n = fb->format->num_planes;
 341
 342         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 343                         (char *)&fb->format->format);
 344
 345         for (i = 0; i < n; i++) {
 346                 struct plane *plane = &omap_fb->planes[i];
 347                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 348                                 i, plane->offset, plane->pitch);
 349                 omap_gem_describe(plane->bo, m);
 350         }
 351 }
 352 #endif
 353
 354 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 355                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 356 {
 357         unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format);
 358         struct drm_gem_object *bos[4];
 359         struct drm_framebuffer *fb;
 360         int i;
 361
 362         for (i = 0; i < num_planes; i++) {
 363                 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
 364                 if (!bos[i]) {
 365                         fb = ERR_PTR(-ENOENT);
 366                         goto error;
 367                 }
 368         }
 369
 370         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 371         if (IS_ERR(fb))
 372                 goto error;
 373
 374         return fb;
 375
 376 error:
 377         while (--i > 0)
 378                 drm_gem_object_unreference_unlocked(bos[i]);
 379
 380         return fb;
 381 }
 382
 383 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 384                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 385 {
 386         const struct drm_format_info *format = NULL;
 387         struct omap_framebuffer *omap_fb = NULL;
 388         struct drm_framebuffer *fb = NULL;
 389         enum omap_color_mode dss_format = 0;
 390         unsigned int pitch = mode_cmd->pitches[0];
 391         int ret, i;
 392
 393         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 394                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 395                         (char *)&mode_cmd->pixel_format);
 396
 397         format = drm_format_info(mode_cmd->pixel_format);
 398
 399         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 400                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 401                         dss_format = formats[i].dss_format;
 402                         break;
 403                 }
 404         }
 405
 406         if (!format || !dss_format) {
 407                 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
 408                         (char *)&mode_cmd->pixel_format);
 409                 ret = -EINVAL;
 410                 goto fail;
 411         }
 412
 413         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 414         if (!omap_fb) {
 415                 ret = -ENOMEM;
 416                 goto fail;
 417         }
 418
 419         fb = &omap_fb->base;
 420         omap_fb->format = format;
 421         omap_fb->dss_format = dss_format;
 422         mutex_init(&omap_fb->lock);
 423
 424         /*
 425          * The code below assumes that no format use more than two planes, and
 426          * that the two planes of multiplane formats need the same number of
 427          * bytes per pixel.
 428          */
 429         if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
 430                 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
 431                 ret = -EINVAL;
 432                 goto fail;
 433         }
 434
 435         if (pitch % format->cpp[0]) {
 436                 dev_dbg(dev->dev,
 437                         "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
 438                         pitch, format->cpp[0]);
 439                 ret = -EINVAL;
 440                 goto fail;
 441         }
 442
 443         for (i = 0; i < format->num_planes; i++) {
 444                 struct plane *plane = &omap_fb->planes[i];
 445                 unsigned int vsub = i == 0 ? 1 : format->vsub;
 446                 unsigned int size;
 447
 448                 size = pitch * mode_cmd->height / vsub;
 449
 450                 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
 451                         dev_dbg(dev->dev,
 452                                 "provided buffer object is too small! %d < %d\n",
 453                                 bos[i]->size - mode_cmd->offsets[i], size);
 454                         ret = -EINVAL;
 455                         goto fail;
 456                 }
 457
 458                 plane->bo     = bos[i];
 459                 plane->offset = mode_cmd->offsets[i];
 460                 plane->pitch  = pitch;
 461                 plane->paddr  = 0;
 462         }
 463
 464         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 465
 466         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 467         if (ret) {
 468                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 469                 goto fail;
 470         }
 471
 472         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 473
 474         return fb;
 475
 476 fail:
 477         kfree(omap_fb);
 478
 479         return ERR_PTR(ret);
 480 }