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 /* per-format info: */
  33 struct format {
  34         enum omap_color_mode dss_format;
  35         uint32_t pixel_format;
  36         struct {
  37                 int stride_bpp;           /* this times width is stride */
  38                 int sub_y;                /* sub-sample in y dimension */
  39         } planes[4];
  40         bool yuv;
  41 };
  42
  43 static const struct format formats[] = {
  44         /* 16bpp [A]RGB: */
  45         { OMAP_DSS_COLOR_RGB16,       DRM_FORMAT_RGB565,   {{2, 1}}, false }, /* RGB16-565 */
  46         { OMAP_DSS_COLOR_RGB12U,      DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */
  47         { OMAP_DSS_COLOR_RGBX16,      DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */
  48         { OMAP_DSS_COLOR_RGBA16,      DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */
  49         { OMAP_DSS_COLOR_ARGB16,      DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */
  50         { OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */
  51         { OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */
  52         /* 24bpp RGB: */
  53         { OMAP_DSS_COLOR_RGB24P,      DRM_FORMAT_RGB888,   {{3, 1}}, false }, /* RGB24-888 */
  54         /* 32bpp [A]RGB: */
  55         { OMAP_DSS_COLOR_RGBX32,      DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */
  56         { OMAP_DSS_COLOR_RGB24U,      DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */
  57         { OMAP_DSS_COLOR_RGBA32,      DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */
  58         { OMAP_DSS_COLOR_ARGB32,      DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */
  59         /* YUV: */
  60         { OMAP_DSS_COLOR_NV12,        DRM_FORMAT_NV12,     {{1, 1}, {1, 2}}, true },
  61         { OMAP_DSS_COLOR_YUV2,        DRM_FORMAT_YUYV,     {{2, 1}}, true },
  62         { OMAP_DSS_COLOR_UYVY,        DRM_FORMAT_UYVY,     {{2, 1}}, true },
  63 };
  64
  65 /* convert from overlay's pixel formats bitmask to an array of fourcc's */
  66 uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
  67                 uint32_t max_formats, enum omap_color_mode supported_modes)
  68 {
  69         uint32_t nformats = 0;
  70         int i = 0;
  71
  72         for (i = 0; i < ARRAY_SIZE(formats) && nformats < max_formats; i++)
  73                 if (formats[i].dss_format & supported_modes)
  74                         pixel_formats[nformats++] = formats[i].pixel_format;
  75
  76         return nformats;
  77 }
  78
  79 /* per-plane info for the fb: */
  80 struct plane {
  81         struct drm_gem_object *bo;
  82         uint32_t pitch;
  83         uint32_t offset;
  84         dma_addr_t paddr;
  85 };
  86
  87 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  88
  89 struct omap_framebuffer {
  90         struct drm_framebuffer base;
  91         int pin_count;
  92         const struct format *format;
  93         struct plane planes[4];
  94         /* lock for pinning (pin_count and planes.paddr) */
  95         struct mutex lock;
  96 };
  97
  98 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
  99                 struct drm_file *file_priv,
 100                 unsigned int *handle)
 101 {
 102         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 103         return drm_gem_handle_create(file_priv,
 104                         omap_fb->planes[0].bo, handle);
 105 }
 106
 107 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
 108 {
 109         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 110         int i, n = drm_format_num_planes(fb->pixel_format);
 111
 112         DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
 113
 114         drm_framebuffer_cleanup(fb);
 115
 116         for (i = 0; i < n; i++) {
 117                 struct plane *plane = &omap_fb->planes[i];
 118                 if (plane->bo)
 119                         drm_gem_object_unreference_unlocked(plane->bo);
 120         }
 121
 122         kfree(omap_fb);
 123 }
 124
 125 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
 126                 struct drm_file *file_priv, unsigned flags, unsigned color,
 127                 struct drm_clip_rect *clips, unsigned num_clips)
 128 {
 129         return 0;
 130 }
 131
 132 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 133         .create_handle = omap_framebuffer_create_handle,
 134         .destroy = omap_framebuffer_destroy,
 135         .dirty = omap_framebuffer_dirty,
 136 };
 137
 138 static uint32_t get_linear_addr(struct plane *plane,
 139                 const struct format *format, int n, int x, int y)
 140 {
 141         uint32_t offset;
 142
 143         offset = plane->offset +
 144                         (x * format->planes[n].stride_bpp) +
 145                         (y * plane->pitch / format->planes[n].sub_y);
 146
 147         return plane->paddr + offset;
 148 }
 149
 150 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 151 {
 152         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 153         struct plane *plane = &omap_fb->planes[0];
 154
 155         return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
 156 }
 157
 158 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 159  */
 160 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 161                 struct omap_drm_window *win, struct omap_overlay_info *info)
 162 {
 163         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 164         const struct format *format = omap_fb->format;
 165         struct plane *plane = &omap_fb->planes[0];
 166         uint32_t x, y, orient = 0;
 167
 168         info->color_mode = format->dss_format;
 169
 170         info->pos_x      = win->crtc_x;
 171         info->pos_y      = win->crtc_y;
 172         info->out_width  = win->crtc_w;
 173         info->out_height = win->crtc_h;
 174         info->width      = win->src_w;
 175         info->height     = win->src_h;
 176
 177         x = win->src_x;
 178         y = win->src_y;
 179
 180         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 181                 uint32_t w = win->src_w;
 182                 uint32_t h = win->src_h;
 183
 184                 switch (win->rotation & DRM_ROTATE_MASK) {
 185                 default:
 186                         dev_err(fb->dev->dev, "invalid rotation: %02x",
 187                                         (uint32_t)win->rotation);
 188                         /* fallthru to default to no rotation */
 189                 case 0:
 190                 case BIT(DRM_ROTATE_0):
 191                         orient = 0;
 192                         break;
 193                 case BIT(DRM_ROTATE_90):
 194                         orient = MASK_XY_FLIP | MASK_X_INVERT;
 195                         break;
 196                 case BIT(DRM_ROTATE_180):
 197                         orient = MASK_X_INVERT | MASK_Y_INVERT;
 198                         break;
 199                 case BIT(DRM_ROTATE_270):
 200                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
 201                         break;
 202                 }
 203
 204                 if (win->rotation & BIT(DRM_REFLECT_X))
 205                         orient ^= MASK_X_INVERT;
 206
 207                 if (win->rotation & BIT(DRM_REFLECT_Y))
 208                         orient ^= MASK_Y_INVERT;
 209
 210                 /* adjust x,y offset for flip/invert: */
 211                 if (orient & MASK_XY_FLIP)
 212                         swap(w, h);
 213                 if (orient & MASK_Y_INVERT)
 214                         y += h - 1;
 215                 if (orient & MASK_X_INVERT)
 216                         x += w - 1;
 217
 218                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
 219                 info->rotation_type = OMAP_DSS_ROT_TILER;
 220                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 221         } else {
 222                 switch (win->rotation & DRM_ROTATE_MASK) {
 223                 case 0:
 224                 case BIT(DRM_ROTATE_0):
 225                         /* OK */
 226                         break;
 227
 228                 default:
 229                         dev_warn(fb->dev->dev,
 230                                 "rotation '%d' ignored for non-tiled fb\n",
 231                                 win->rotation);
 232                         win->rotation = 0;
 233                         break;
 234                 }
 235
 236                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 237                 info->rotation_type = OMAP_DSS_ROT_DMA;
 238                 info->screen_width  = plane->pitch;
 239         }
 240
 241         /* convert to pixels: */
 242         info->screen_width /= format->planes[0].stride_bpp;
 243
 244         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 245                 plane = &omap_fb->planes[1];
 246
 247                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 248                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 249                         omap_gem_rotated_paddr(plane->bo, orient,
 250                                         x/2, y/2, &info->p_uv_addr);
 251                 } else {
 252                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 253                 }
 254         } else {
 255                 info->p_uv_addr = 0;
 256         }
 257 }
 258
 259 /* pin, prepare for scanout: */
 260 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 261 {
 262         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 263         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 264
 265         mutex_lock(&omap_fb->lock);
 266
 267         if (omap_fb->pin_count > 0) {
 268                 omap_fb->pin_count++;
 269                 mutex_unlock(&omap_fb->lock);
 270                 return 0;
 271         }
 272
 273         for (i = 0; i < n; i++) {
 274                 struct plane *plane = &omap_fb->planes[i];
 275                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 276                 if (ret)
 277                         goto fail;
 278                 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
 279         }
 280
 281         omap_fb->pin_count++;
 282
 283         mutex_unlock(&omap_fb->lock);
 284
 285         return 0;
 286
 287 fail:
 288         for (i--; i >= 0; i--) {
 289                 struct plane *plane = &omap_fb->planes[i];
 290                 omap_gem_put_paddr(plane->bo);
 291                 plane->paddr = 0;
 292         }
 293
 294         mutex_unlock(&omap_fb->lock);
 295
 296         return ret;
 297 }
 298
 299 /* unpin, no longer being scanned out: */
 300 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 301 {
 302         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 303         int i, n = drm_format_num_planes(fb->pixel_format);
 304
 305         mutex_lock(&omap_fb->lock);
 306
 307         omap_fb->pin_count--;
 308
 309         if (omap_fb->pin_count > 0) {
 310                 mutex_unlock(&omap_fb->lock);
 311                 return;
 312         }
 313
 314         for (i = 0; i < n; i++) {
 315                 struct plane *plane = &omap_fb->planes[i];
 316                 omap_gem_put_paddr(plane->bo);
 317                 plane->paddr = 0;
 318         }
 319
 320         mutex_unlock(&omap_fb->lock);
 321 }
 322
 323 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
 324 {
 325         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 326         if (p >= drm_format_num_planes(fb->pixel_format))
 327                 return NULL;
 328         return omap_fb->planes[p].bo;
 329 }
 330
 331 /* iterate thru all the connectors, returning ones that are attached
 332  * to the same fb..
 333  */
 334 struct drm_connector *omap_framebuffer_get_next_connector(
 335                 struct drm_framebuffer *fb, struct drm_connector *from)
 336 {
 337         struct drm_device *dev = fb->dev;
 338         struct list_head *connector_list = &dev->mode_config.connector_list;
 339         struct drm_connector *connector = from;
 340
 341         if (!from)
 342                 return list_first_entry_or_null(connector_list, typeof(*from),
 343                                                 head);
 344
 345         list_for_each_entry_from(connector, connector_list, head) {
 346                 if (connector != from) {
 347                         struct drm_encoder *encoder = connector->encoder;
 348                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 349                         if (crtc && crtc->primary->fb == fb)
 350                                 return connector;
 351
 352                 }
 353         }
 354
 355         return NULL;
 356 }
 357
 358 #ifdef CONFIG_DEBUG_FS
 359 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 360 {
 361         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 362         int i, n = drm_format_num_planes(fb->pixel_format);
 363
 364         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 365                         (char *)&fb->pixel_format);
 366
 367         for (i = 0; i < n; i++) {
 368                 struct plane *plane = &omap_fb->planes[i];
 369                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 370                                 i, plane->offset, plane->pitch);
 371                 omap_gem_describe(plane->bo, m);
 372         }
 373 }
 374 #endif
 375
 376 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 377                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 378 {
 379         struct drm_gem_object *bos[4];
 380         struct drm_framebuffer *fb;
 381         int ret;
 382
 383         ret = objects_lookup(file, mode_cmd->pixel_format,
 384                         bos, mode_cmd->handles);
 385         if (ret)
 386                 return ERR_PTR(ret);
 387
 388         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 389         if (IS_ERR(fb)) {
 390                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 391                 for (i = 0; i < n; i++)
 392                         drm_gem_object_unreference_unlocked(bos[i]);
 393                 return fb;
 394         }
 395         return fb;
 396 }
 397
 398 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 399                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 400 {
 401         struct omap_framebuffer *omap_fb = NULL;
 402         struct drm_framebuffer *fb = NULL;
 403         const struct format *format = NULL;
 404         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 405
 406         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 407                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 408                         (char *)&mode_cmd->pixel_format);
 409
 410         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 411                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 412                         format = &formats[i];
 413                         break;
 414                 }
 415         }
 416
 417         if (!format) {
 418                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 419                                 (char *)&mode_cmd->pixel_format);
 420                 ret = -EINVAL;
 421                 goto fail;
 422         }
 423
 424         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 425         if (!omap_fb) {
 426                 ret = -ENOMEM;
 427                 goto fail;
 428         }
 429
 430         fb = &omap_fb->base;
 431         omap_fb->format = format;
 432         mutex_init(&omap_fb->lock);
 433
 434         for (i = 0; i < n; i++) {
 435                 struct plane *plane = &omap_fb->planes[i];
 436                 int size, pitch = mode_cmd->pitches[i];
 437
 438                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 439                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 440                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 441                         ret = -EINVAL;
 442                         goto fail;
 443                 }
 444
 445                 if (pitch % format->planes[i].stride_bpp != 0) {
 446                         dev_err(dev->dev,
 447                                 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n",
 448                                 pitch, format->planes[i].stride_bpp);
 449                         ret = -EINVAL;
 450                         goto fail;
 451                 }
 452
 453                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 454
 455                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
 456                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 457                                         bos[i]->size - mode_cmd->offsets[i], size);
 458                         ret = -EINVAL;
 459                         goto fail;
 460                 }
 461
 462                 if (i > 0 && pitch != mode_cmd->pitches[i - 1]) {
 463                         dev_err(dev->dev,
 464                                 "pitches are not the same between framebuffer planes %d != %d\n",
 465                                 pitch, mode_cmd->pitches[i - 1]);
 466                         ret = -EINVAL;
 467                         goto fail;
 468                 }
 469
 470                 plane->bo     = bos[i];
 471                 plane->offset = mode_cmd->offsets[i];
 472                 plane->pitch  = pitch;
 473                 plane->paddr  = 0;
 474         }
 475
 476         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 477
 478         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 479         if (ret) {
 480                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 481                 goto fail;
 482         }
 483
 484         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 485
 486         return fb;
 487
 488 fail:
 489         kfree(omap_fb);
 490
 491         return ERR_PTR(ret);
 492 }