drivers/gpu/drm/omapdrm/omap_fb.c

   1 /*
   2  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   3  * Author: Rob Clark <rob@ti.com>
   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 <linux/seq_file.h>
  19
  20 #include <drm/drm_crtc.h>
  21 #include <drm/drm_crtc_helper.h>
  22
  23 #include "omap_dmm_tiler.h"
  24 #include "omap_drv.h"
  25
  26 /*
  27  * framebuffer funcs
  28  */
  29
  30 static const u32 formats[] = {
  31         /* 16bpp [A]RGB: */
  32         DRM_FORMAT_RGB565, /* RGB16-565 */
  33         DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
  34         DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
  35         DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
  36         DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
  37         DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
  38         DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
  39         /* 24bpp RGB: */
  40         DRM_FORMAT_RGB888,   /* RGB24-888 */
  41         /* 32bpp [A]RGB: */
  42         DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
  43         DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
  44         DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
  45         DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
  46         /* YUV: */
  47         DRM_FORMAT_NV12,
  48         DRM_FORMAT_YUYV,
  49         DRM_FORMAT_UYVY,
  50 };
  51
  52 /* per-plane info for the fb: */
  53 struct plane {
  54         struct drm_gem_object *bo;
  55         uint32_t pitch;
  56         uint32_t offset;
  57         dma_addr_t dma_addr;
  58 };
  59
  60 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  61
  62 struct omap_framebuffer {
  63         struct drm_framebuffer base;
  64         int pin_count;
  65         const struct drm_format_info *format;
  66         struct plane planes[2];
  67         /* lock for pinning (pin_count and planes.dma_addr) */
  68         struct mutex lock;
  69 };
  70
  71 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  72                 struct drm_file *file_priv,
  73                 unsigned int *handle)
  74 {
  75         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  76         return drm_gem_handle_create(file_priv,
  77                         omap_fb->planes[0].bo, handle);
  78 }
  79
  80 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
  81 {
  82         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
  83         int i, n = fb->format->num_planes;
  84
  85         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
  86
  87         drm_framebuffer_cleanup(fb);
  88
  89         for (i = 0; i < n; i++) {
  90                 struct plane *plane = &omap_fb->planes[i];
  91
  92                 drm_gem_object_unreference_unlocked(plane->bo);
  93         }
  94
  95         kfree(omap_fb);
  96 }
  97
  98 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
  99         .create_handle = omap_framebuffer_create_handle,
 100         .destroy = omap_framebuffer_destroy,
 101 };
 102
 103 static uint32_t get_linear_addr(struct plane *plane,
 104                 const struct drm_format_info *format, int n, int x, int y)
 105 {
 106         uint32_t offset;
 107
 108         offset = plane->offset
 109                + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
 110                + (y * plane->pitch / (n == 0 ? 1 : format->vsub));
 111
 112         return plane->dma_addr + offset;
 113 }
 114
 115 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 116 {
 117         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 118         struct plane *plane = &omap_fb->planes[0];
 119
 120         return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
 121 }
 122
 123 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
 124 static uint32_t drm_rotation_to_tiler(unsigned int drm_rot)
 125 {
 126         uint32_t orient;
 127
 128         switch (drm_rot & DRM_MODE_ROTATE_MASK) {
 129         default:
 130         case DRM_MODE_ROTATE_0:
 131                 orient = 0;
 132                 break;
 133         case DRM_MODE_ROTATE_90:
 134                 orient = MASK_XY_FLIP | MASK_X_INVERT;
 135                 break;
 136         case DRM_MODE_ROTATE_180:
 137                 orient = MASK_X_INVERT | MASK_Y_INVERT;
 138                 break;
 139         case DRM_MODE_ROTATE_270:
 140                 orient = MASK_XY_FLIP | MASK_Y_INVERT;
 141                 break;
 142         }
 143
 144         if (drm_rot & DRM_MODE_REFLECT_X)
 145                 orient ^= MASK_X_INVERT;
 146
 147         if (drm_rot & DRM_MODE_REFLECT_Y)
 148                 orient ^= MASK_Y_INVERT;
 149
 150         return orient;
 151 }
 152
 153 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 154  */
 155 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 156                 struct drm_plane_state *state, struct omap_overlay_info *info)
 157 {
 158         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 159         const struct drm_format_info *format = omap_fb->format;
 160         struct plane *plane = &omap_fb->planes[0];
 161         uint32_t x, y, orient = 0;
 162
 163         info->fourcc = fb->format->format;
 164
 165         info->pos_x      = state->crtc_x;
 166         info->pos_y      = state->crtc_y;
 167         info->out_width  = state->crtc_w;
 168         info->out_height = state->crtc_h;
 169         info->width      = state->src_w >> 16;
 170         info->height     = state->src_h >> 16;
 171
 172         /* DSS driver wants the w & h in rotated orientation */
 173         if (drm_rotation_90_or_270(state->rotation))
 174                 swap(info->width, info->height);
 175
 176         x = state->src_x >> 16;
 177         y = state->src_y >> 16;
 178
 179         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 180                 uint32_t w = state->src_w >> 16;
 181                 uint32_t h = state->src_h >> 16;
 182
 183                 orient = drm_rotation_to_tiler(state->rotation);
 184
 185                 /*
 186                  * omap_gem_rotated_paddr() wants the x & y in tiler units.
 187                  * Usually tiler unit size is the same as the pixel size, except
 188                  * for YUV422 formats, for which the tiler unit size is 32 bits
 189                  * and pixel size is 16 bits.
 190                  */
 191                 if (fb->format->format == DRM_FORMAT_UYVY ||
 192                                 fb->format->format == DRM_FORMAT_YUYV) {
 193                         x /= 2;
 194                         w /= 2;
 195                 }
 196
 197                 /* adjust x,y offset for invert: */
 198                 if (orient & MASK_Y_INVERT)
 199                         y += h - 1;
 200                 if (orient & MASK_X_INVERT)
 201                         x += w - 1;
 202
 203                 /* Note: x and y are in TILER units, not pixels */
 204                 omap_gem_rotated_dma_addr(plane->bo, orient, x, y,
 205                                           &info->paddr);
 206                 info->rotation_type = OMAP_DSS_ROT_TILER;
 207                 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
 208                 /* Note: stride in TILER units, not pixels */
 209                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 210         } else {
 211                 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
 212                 case 0:
 213                 case DRM_MODE_ROTATE_0:
 214                         /* OK */
 215                         break;
 216
 217                 default:
 218                         dev_warn(fb->dev->dev,
 219                                 "rotation '%d' ignored for non-tiled fb\n",
 220                                 state->rotation);
 221                         break;
 222                 }
 223
 224                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 225                 info->rotation_type = OMAP_DSS_ROT_NONE;
 226                 info->rotation      = DRM_MODE_ROTATE_0;
 227                 info->screen_width  = plane->pitch;
 228         }
 229
 230         /* convert to pixels: */
 231         info->screen_width /= format->cpp[0];
 232
 233         if (fb->format->format == DRM_FORMAT_NV12) {
 234                 plane = &omap_fb->planes[1];
 235
 236                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 237                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 238                         omap_gem_rotated_dma_addr(plane->bo, orient, x/2, y/2,
 239                                                   &info->p_uv_addr);
 240                 } else {
 241                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 242                 }
 243         } else {
 244                 info->p_uv_addr = 0;
 245         }
 246 }
 247
 248 /* pin, prepare for scanout: */
 249 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 250 {
 251         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 252         int ret, i, n = fb->format->num_planes;
 253
 254         mutex_lock(&omap_fb->lock);
 255
 256         if (omap_fb->pin_count > 0) {
 257                 omap_fb->pin_count++;
 258                 mutex_unlock(&omap_fb->lock);
 259                 return 0;
 260         }
 261
 262         for (i = 0; i < n; i++) {
 263                 struct plane *plane = &omap_fb->planes[i];
 264                 ret = omap_gem_pin(plane->bo, &plane->dma_addr);
 265                 if (ret)
 266                         goto fail;
 267                 omap_gem_dma_sync_buffer(plane->bo, DMA_TO_DEVICE);
 268         }
 269
 270         omap_fb->pin_count++;
 271
 272         mutex_unlock(&omap_fb->lock);
 273
 274         return 0;
 275
 276 fail:
 277         for (i--; i >= 0; i--) {
 278                 struct plane *plane = &omap_fb->planes[i];
 279                 omap_gem_unpin(plane->bo);
 280                 plane->dma_addr = 0;
 281         }
 282
 283         mutex_unlock(&omap_fb->lock);
 284
 285         return ret;
 286 }
 287
 288 /* unpin, no longer being scanned out: */
 289 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 290 {
 291         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 292         int i, n = fb->format->num_planes;
 293
 294         mutex_lock(&omap_fb->lock);
 295
 296         omap_fb->pin_count--;
 297
 298         if (omap_fb->pin_count > 0) {
 299                 mutex_unlock(&omap_fb->lock);
 300                 return;
 301         }
 302
 303         for (i = 0; i < n; i++) {
 304                 struct plane *plane = &omap_fb->planes[i];
 305                 omap_gem_unpin(plane->bo);
 306                 plane->dma_addr = 0;
 307         }
 308
 309         mutex_unlock(&omap_fb->lock);
 310 }
 311
 312 /* iterate thru all the connectors, returning ones that are attached
 313  * to the same fb..
 314  */
 315 struct drm_connector *omap_framebuffer_get_next_connector(
 316                 struct drm_framebuffer *fb, struct drm_connector *from)
 317 {
 318         struct drm_device *dev = fb->dev;
 319         struct list_head *connector_list = &dev->mode_config.connector_list;
 320         struct drm_connector *connector = from;
 321
 322         if (!from)
 323                 return list_first_entry_or_null(connector_list, typeof(*from),
 324                                                 head);
 325
 326         list_for_each_entry_from(connector, connector_list, head) {
 327                 if (connector != from) {
 328                         struct drm_encoder *encoder = connector->encoder;
 329                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 330                         if (crtc && crtc->primary->fb == fb)
 331                                 return connector;
 332
 333                 }
 334         }
 335
 336         return NULL;
 337 }
 338
 339 #ifdef CONFIG_DEBUG_FS
 340 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 341 {
 342         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 343         int i, n = fb->format->num_planes;
 344
 345         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 346                         (char *)&fb->format->format);
 347
 348         for (i = 0; i < n; i++) {
 349                 struct plane *plane = &omap_fb->planes[i];
 350                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 351                                 i, plane->offset, plane->pitch);
 352                 omap_gem_describe(plane->bo, m);
 353         }
 354 }
 355 #endif
 356
 357 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 358                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 359 {
 360         unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format);
 361         struct drm_gem_object *bos[4];
 362         struct drm_framebuffer *fb;
 363         int i;
 364
 365         for (i = 0; i < num_planes; i++) {
 366                 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
 367                 if (!bos[i]) {
 368                         fb = ERR_PTR(-ENOENT);
 369                         goto error;
 370                 }
 371         }
 372
 373         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 374         if (IS_ERR(fb))
 375                 goto error;
 376
 377         return fb;
 378
 379 error:
 380         while (--i >= 0)
 381                 drm_gem_object_unreference_unlocked(bos[i]);
 382
 383         return fb;
 384 }
 385
 386 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 387                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 388 {
 389         const struct drm_format_info *format = NULL;
 390         struct omap_framebuffer *omap_fb = NULL;
 391         struct drm_framebuffer *fb = NULL;
 392         unsigned int pitch = mode_cmd->pitches[0];
 393         int ret, i;
 394
 395         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 396                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 397                         (char *)&mode_cmd->pixel_format);
 398
 399         format = drm_format_info(mode_cmd->pixel_format);
 400
 401         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 402                 if (formats[i] == mode_cmd->pixel_format)
 403                         break;
 404         }
 405
 406         if (!format || i == ARRAY_SIZE(formats)) {
 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         mutex_init(&omap_fb->lock);
 422
 423         /*
 424          * The code below assumes that no format use more than two planes, and
 425          * that the two planes of multiplane formats need the same number of
 426          * bytes per pixel.
 427          */
 428         if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
 429                 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
 430                 ret = -EINVAL;
 431                 goto fail;
 432         }
 433
 434         if (pitch % format->cpp[0]) {
 435                 dev_dbg(dev->dev,
 436                         "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
 437                         pitch, format->cpp[0]);
 438                 ret = -EINVAL;
 439                 goto fail;
 440         }
 441
 442         for (i = 0; i < format->num_planes; i++) {
 443                 struct plane *plane = &omap_fb->planes[i];
 444                 unsigned int vsub = i == 0 ? 1 : format->vsub;
 445                 unsigned int size;
 446
 447                 size = pitch * mode_cmd->height / vsub;
 448
 449                 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
 450                         dev_dbg(dev->dev,
 451                                 "provided buffer object is too small! %zu < %d\n",
 452                                 bos[i]->size - mode_cmd->offsets[i], size);
 453                         ret = -EINVAL;
 454                         goto fail;
 455                 }
 456
 457                 plane->bo     = bos[i];
 458                 plane->offset = mode_cmd->offsets[i];
 459                 plane->pitch  = pitch;
 460                 plane->dma_addr  = 0;
 461         }
 462
 463         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
 464
 465         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 466         if (ret) {
 467                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 468                 goto fail;
 469         }
 470
 471         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 472
 473         return fb;
 474
 475 fail:
 476         kfree(omap_fb);
 477
 478         return ERR_PTR(ret);
 479 }