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 static const u32 formats[] = {
  33         /* 16bpp [A]RGB: */
  34         DRM_FORMAT_RGB565, /* RGB16-565 */
  35         DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
  36         DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
  37         DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
  38         DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
  39         DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
  40         DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
  41         /* 24bpp RGB: */
  42         DRM_FORMAT_RGB888,   /* RGB24-888 */
  43         /* 32bpp [A]RGB: */
  44         DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
  45         DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
  46         DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
  47         DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
  48         /* YUV: */
  49         DRM_FORMAT_NV12,
  50         DRM_FORMAT_YUYV,
  51         DRM_FORMAT_UYVY,
  52 };
  53
  54 /* per-plane info for the fb: */
  55 struct plane {
  56         struct drm_gem_object *bo;
  57         uint32_t pitch;
  58         uint32_t offset;
  59         dma_addr_t dma_addr;
  60 };
  61
  62 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  63
  64 struct omap_framebuffer {
  65         struct drm_framebuffer base;
  66         int pin_count;
  67         const struct drm_format_info *format;
  68         struct plane planes[2];
  69         /* lock for pinning (pin_count and planes.dma_addr) */
  70         struct mutex lock;
  71 };
  72
  73 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  74                 struct drm_file *file_priv,
  75                 unsigned int *handle)
  76 {
  77         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  78         return drm_gem_handle_create(file_priv,
  79                         omap_fb->planes[0].bo, handle);
  80 }
  81
  82 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
  83 {
  84         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  85         int i, n = fb->format->num_planes;
  86
  87         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
  88
  89         drm_framebuffer_cleanup(fb);
  90
  91         for (i = 0; i < n; i++) {
  92                 struct plane *plane = &omap_fb->planes[i];
  93
  94                 drm_gem_object_unreference_unlocked(plane->bo);
  95         }
  96
  97         kfree(omap_fb);
  98 }
  99
 100 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 101         .create_handle = omap_framebuffer_create_handle,
 102         .destroy = omap_framebuffer_destroy,
 103 };
 104
 105 static uint32_t get_linear_addr(struct plane *plane,
 106                 const struct drm_format_info *format, int n, int x, int y)
 107 {
 108         uint32_t offset;
 109
 110         offset = plane->offset
 111                + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
 112                + (y * plane->pitch / (n == 0 ? 1 : format->vsub));
 113
 114         return plane->dma_addr + offset;
 115 }
 116
 117 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 118 {
 119         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 120         struct plane *plane = &omap_fb->planes[0];
 121
 122         return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
 123 }
 124
 125 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
 126 static uint32_t drm_rotation_to_tiler(unsigned int drm_rot)
 127 {
 128         uint32_t orient;
 129
 130         switch (drm_rot & DRM_MODE_ROTATE_MASK) {
 131         default:
 132         case DRM_MODE_ROTATE_0:
 133                 orient = 0;
 134                 break;
 135         case DRM_MODE_ROTATE_90:
 136                 orient = MASK_XY_FLIP | MASK_X_INVERT;
 137                 break;
 138         case DRM_MODE_ROTATE_180:
 139                 orient = MASK_X_INVERT | MASK_Y_INVERT;
 140                 break;
 141         case DRM_MODE_ROTATE_270:
 142                 orient = MASK_XY_FLIP | MASK_Y_INVERT;
 143                 break;
 144         }
 145
 146         if (drm_rot & DRM_MODE_REFLECT_X)
 147                 orient ^= MASK_X_INVERT;
 148
 149         if (drm_rot & DRM_MODE_REFLECT_Y)
 150                 orient ^= MASK_Y_INVERT;
 151
 152         return orient;
 153 }
 154
 155 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 156  */
 157 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 158                 struct drm_plane_state *state, struct omap_overlay_info *info)
 159 {
 160         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 161         const struct drm_format_info *format = omap_fb->format;
 162         struct plane *plane = &omap_fb->planes[0];
 163         uint32_t x, y, orient = 0;
 164
 165         info->fourcc = fb->format->format;
 166
 167         info->pos_x      = state->crtc_x;
 168         info->pos_y      = state->crtc_y;
 169         info->out_width  = state->crtc_w;
 170         info->out_height = state->crtc_h;
 171         info->width      = state->src_w >> 16;
 172         info->height     = state->src_h >> 16;
 173
 174         /* DSS driver wants the w & h in rotated orientation */
 175         if (drm_rotation_90_or_270(state->rotation))
 176                 swap(info->width, info->height);
 177
 178         x = state->src_x >> 16;
 179         y = state->src_y >> 16;
 180
 181         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 182                 uint32_t w = state->src_w >> 16;
 183                 uint32_t h = state->src_h >> 16;
 184
 185                 orient = drm_rotation_to_tiler(state->rotation);
 186
 187                 /*
 188                  * omap_gem_rotated_paddr() wants the x & y in tiler units.
 189                  * Usually tiler unit size is the same as the pixel size, except
 190                  * for YUV422 formats, for which the tiler unit size is 32 bits
 191                  * and pixel size is 16 bits.
 192                  */
 193                 if (fb->format->format == DRM_FORMAT_UYVY ||
 194                                 fb->format->format == DRM_FORMAT_YUYV) {
 195                         x /= 2;
 196                         w /= 2;
 197                 }
 198
 199                 /* adjust x,y offset for invert: */
 200                 if (orient & MASK_Y_INVERT)
 201                         y += h - 1;
 202                 if (orient & MASK_X_INVERT)
 203                         x += w - 1;
 204
 205                 /* Note: x and y are in TILER units, not pixels */
 206                 omap_gem_rotated_dma_addr(plane->bo, orient, x, y,
 207                                           &info->paddr);
 208                 info->rotation_type = OMAP_DSS_ROT_TILER;
 209                 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
 210                 /* Note: stride in TILER units, not pixels */
 211                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 212         } else {
 213                 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
 214                 case 0:
 215                 case DRM_MODE_ROTATE_0:
 216                         /* OK */
 217                         break;
 218
 219                 default:
 220                         dev_warn(fb->dev->dev,
 221                                 "rotation '%d' ignored for non-tiled fb\n",
 222                                 state->rotation);
 223                         break;
 224                 }
 225
 226                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 227                 info->rotation_type = OMAP_DSS_ROT_NONE;
 228                 info->rotation      = DRM_MODE_ROTATE_0;
 229                 info->screen_width  = plane->pitch;
 230         }
 231
 232         /* convert to pixels: */
 233         info->screen_width /= format->cpp[0];
 234
 235         if (fb->format->format == DRM_FORMAT_NV12) {
 236                 plane = &omap_fb->planes[1];
 237
 238                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 239                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 240                         omap_gem_rotated_dma_addr(plane->bo, orient, x/2, y/2,
 241                                                   &info->p_uv_addr);
 242                 } else {
 243                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 244                 }
 245         } else {
 246                 info->p_uv_addr = 0;
 247         }
 248 }
 249
 250 /* pin, prepare for scanout: */
 251 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 252 {
 253         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 254         int ret, i, n = fb->format->num_planes;
 255
 256         mutex_lock(&omap_fb->lock);
 257
 258         if (omap_fb->pin_count > 0) {
 259                 omap_fb->pin_count++;
 260                 mutex_unlock(&omap_fb->lock);
 261                 return 0;
 262         }
 263
 264         for (i = 0; i < n; i++) {
 265                 struct plane *plane = &omap_fb->planes[i];
 266                 ret = omap_gem_pin(plane->bo, &plane->dma_addr);
 267                 if (ret)
 268                         goto fail;
 269                 omap_gem_dma_sync_buffer(plane->bo, DMA_TO_DEVICE);
 270         }
 271
 272         omap_fb->pin_count++;
 273
 274         mutex_unlock(&omap_fb->lock);
 275
 276         return 0;
 277
 278 fail:
 279         for (i--; i >= 0; i--) {
 280                 struct plane *plane = &omap_fb->planes[i];
 281                 omap_gem_unpin(plane->bo);
 282                 plane->dma_addr = 0;
 283         }
 284
 285         mutex_unlock(&omap_fb->lock);
 286
 287         return ret;
 288 }
 289
 290 /* unpin, no longer being scanned out: */
 291 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 292 {
 293         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 294         int i, n = fb->format->num_planes;
 295
 296         mutex_lock(&omap_fb->lock);
 297
 298         omap_fb->pin_count--;
 299
 300         if (omap_fb->pin_count > 0) {
 301                 mutex_unlock(&omap_fb->lock);
 302                 return;
 303         }
 304
 305         for (i = 0; i < n; i++) {
 306                 struct plane *plane = &omap_fb->planes[i];
 307                 omap_gem_unpin(plane->bo);
 308                 plane->dma_addr = 0;
 309         }
 310
 311         mutex_unlock(&omap_fb->lock);
 312 }
 313
 314 /* iterate thru all the connectors, returning ones that are attached
 315  * to the same fb..
 316  */
 317 struct drm_connector *omap_framebuffer_get_next_connector(
 318                 struct drm_framebuffer *fb, struct drm_connector *from)
 319 {
 320         struct drm_device *dev = fb->dev;
 321         struct list_head *connector_list = &dev->mode_config.connector_list;
 322         struct drm_connector *connector = from;
 323
 324         if (!from)
 325                 return list_first_entry_or_null(connector_list, typeof(*from),
 326                                                 head);
 327
 328         list_for_each_entry_from(connector, connector_list, head) {
 329                 if (connector != from) {
 330                         struct drm_encoder *encoder = connector->encoder;
 331                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 332                         if (crtc && crtc->primary->fb == fb)
 333                                 return connector;
 334
 335                 }
 336         }
 337
 338         return NULL;
 339 }
 340
 341 #ifdef CONFIG_DEBUG_FS
 342 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 343 {
 344         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 345         int i, n = fb->format->num_planes;
 346
 347         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 348                         (char *)&fb->format->format);
 349
 350         for (i = 0; i < n; i++) {
 351                 struct plane *plane = &omap_fb->planes[i];
 352                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 353                                 i, plane->offset, plane->pitch);
 354                 omap_gem_describe(plane->bo, m);
 355         }
 356 }
 357 #endif
 358
 359 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 360                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 361 {
 362         unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format);
 363         struct drm_gem_object *bos[4];
 364         struct drm_framebuffer *fb;
 365         int i;
 366
 367         for (i = 0; i < num_planes; i++) {
 368                 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
 369                 if (!bos[i]) {
 370                         fb = ERR_PTR(-ENOENT);
 371                         goto error;
 372                 }
 373         }
 374
 375         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 376         if (IS_ERR(fb))
 377                 goto error;
 378
 379         return fb;
 380
 381 error:
 382         while (--i > 0)
 383                 drm_gem_object_unreference_unlocked(bos[i]);
 384
 385         return fb;
 386 }
 387
 388 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 389                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 390 {
 391         const struct drm_format_info *format = NULL;
 392         struct omap_framebuffer *omap_fb = NULL;
 393         struct drm_framebuffer *fb = NULL;
 394         unsigned int pitch = mode_cmd->pitches[0];
 395         int ret, i;
 396
 397         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 398                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 399                         (char *)&mode_cmd->pixel_format);
 400
 401         format = drm_format_info(mode_cmd->pixel_format);
 402
 403         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 404                 if (formats[i] == mode_cmd->pixel_format)
 405                         break;
 406         }
 407
 408         if (!format || i == ARRAY_SIZE(formats)) {
 409                 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
 410                         (char *)&mode_cmd->pixel_format);
 411                 ret = -EINVAL;
 412                 goto fail;
 413         }
 414
 415         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 416         if (!omap_fb) {
 417                 ret = -ENOMEM;
 418                 goto fail;
 419         }
 420
 421         fb = &omap_fb->base;
 422         omap_fb->format = format;
 423         mutex_init(&omap_fb->lock);
 424
 425         /*
 426          * The code below assumes that no format use more than two planes, and
 427          * that the two planes of multiplane formats need the same number of
 428          * bytes per pixel.
 429          */
 430         if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
 431                 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
 432                 ret = -EINVAL;
 433                 goto fail;
 434         }
 435
 436         if (pitch % format->cpp[0]) {
 437                 dev_dbg(dev->dev,
 438                         "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
 439                         pitch, format->cpp[0]);
 440                 ret = -EINVAL;
 441                 goto fail;
 442         }
 443
 444         for (i = 0; i < format->num_planes; i++) {
 445                 struct plane *plane = &omap_fb->planes[i];
 446                 unsigned int vsub = i == 0 ? 1 : format->vsub;
 447                 unsigned int size;
 448
 449                 size = pitch * mode_cmd->height / vsub;
 450
 451                 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
 452                         dev_dbg(dev->dev,
 453                                 "provided buffer object is too small! %zu < %d\n",
 454                                 bos[i]->size - mode_cmd->offsets[i], size);
 455                         ret = -EINVAL;
 456                         goto fail;
 457                 }
 458
 459                 plane->bo     = bos[i];
 460                 plane->offset = mode_cmd->offsets[i];
 461                 plane->pitch  = pitch;
 462                 plane->dma_addr  = 0;
 463         }
 464
 465         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 466
 467         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 468         if (ret) {
 469                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 470                 goto fail;
 471         }
 472
 473         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 474
 475         return fb;
 476
 477 fail:
 478         kfree(omap_fb);
 479
 480         return ERR_PTR(ret);
 481 }