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
 119                 drm_gem_object_unreference_unlocked(plane->bo);
 120         }
 121
 122         kfree(omap_fb);
 123 }
 124
 125 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
 126         .create_handle = omap_framebuffer_create_handle,
 127         .destroy = omap_framebuffer_destroy,
 128 };
 129
 130 static uint32_t get_linear_addr(struct plane *plane,
 131                 const struct format *format, int n, int x, int y)
 132 {
 133         uint32_t offset;
 134
 135         offset = plane->offset +
 136                         (x * format->planes[n].stride_bpp) +
 137                         (y * plane->pitch / format->planes[n].sub_y);
 138
 139         return plane->paddr + offset;
 140 }
 141
 142 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
 143 {
 144         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 145         struct plane *plane = &omap_fb->planes[0];
 146
 147         return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
 148 }
 149
 150 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
 151  */
 152 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 153                 struct omap_drm_window *win, struct omap_overlay_info *info)
 154 {
 155         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 156         const struct format *format = omap_fb->format;
 157         struct plane *plane = &omap_fb->planes[0];
 158         uint32_t x, y, orient = 0;
 159
 160         info->color_mode = format->dss_format;
 161
 162         info->pos_x      = win->crtc_x;
 163         info->pos_y      = win->crtc_y;
 164         info->out_width  = win->crtc_w;
 165         info->out_height = win->crtc_h;
 166         info->width      = win->src_w;
 167         info->height     = win->src_h;
 168
 169         x = win->src_x;
 170         y = win->src_y;
 171
 172         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
 173                 uint32_t w = win->src_w;
 174                 uint32_t h = win->src_h;
 175
 176                 switch (win->rotation & DRM_ROTATE_MASK) {
 177                 default:
 178                         dev_err(fb->dev->dev, "invalid rotation: %02x",
 179                                         (uint32_t)win->rotation);
 180                         /* fallthru to default to no rotation */
 181                 case 0:
 182                 case DRM_ROTATE_0:
 183                         orient = 0;
 184                         break;
 185                 case DRM_ROTATE_90:
 186                         orient = MASK_XY_FLIP | MASK_X_INVERT;
 187                         break;
 188                 case DRM_ROTATE_180:
 189                         orient = MASK_X_INVERT | MASK_Y_INVERT;
 190                         break;
 191                 case DRM_ROTATE_270:
 192                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
 193                         break;
 194                 }
 195
 196                 if (win->rotation & DRM_REFLECT_X)
 197                         orient ^= MASK_X_INVERT;
 198
 199                 if (win->rotation & DRM_REFLECT_Y)
 200                         orient ^= MASK_Y_INVERT;
 201
 202                 /* adjust x,y offset for flip/invert: */
 203                 if (orient & MASK_XY_FLIP)
 204                         swap(w, h);
 205                 if (orient & MASK_Y_INVERT)
 206                         y += h - 1;
 207                 if (orient & MASK_X_INVERT)
 208                         x += w - 1;
 209
 210                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
 211                 info->rotation_type = OMAP_DSS_ROT_TILER;
 212                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 213         } else {
 214                 switch (win->rotation & DRM_ROTATE_MASK) {
 215                 case 0:
 216                 case DRM_ROTATE_0:
 217                         /* OK */
 218                         break;
 219
 220                 default:
 221                         dev_warn(fb->dev->dev,
 222                                 "rotation '%d' ignored for non-tiled fb\n",
 223                                 win->rotation);
 224                         win->rotation = 0;
 225                         break;
 226                 }
 227
 228                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
 229                 info->rotation_type = OMAP_DSS_ROT_DMA;
 230                 info->screen_width  = plane->pitch;
 231         }
 232
 233         /* convert to pixels: */
 234         info->screen_width /= format->planes[0].stride_bpp;
 235
 236         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
 237                 plane = &omap_fb->planes[1];
 238
 239                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
 240                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
 241                         omap_gem_rotated_paddr(plane->bo, orient,
 242                                         x/2, y/2, &info->p_uv_addr);
 243                 } else {
 244                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
 245                 }
 246         } else {
 247                 info->p_uv_addr = 0;
 248         }
 249 }
 250
 251 /* pin, prepare for scanout: */
 252 int omap_framebuffer_pin(struct drm_framebuffer *fb)
 253 {
 254         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 255         int ret, i, n = drm_format_num_planes(fb->pixel_format);
 256
 257         mutex_lock(&omap_fb->lock);
 258
 259         if (omap_fb->pin_count > 0) {
 260                 omap_fb->pin_count++;
 261                 mutex_unlock(&omap_fb->lock);
 262                 return 0;
 263         }
 264
 265         for (i = 0; i < n; i++) {
 266                 struct plane *plane = &omap_fb->planes[i];
 267                 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
 268                 if (ret)
 269                         goto fail;
 270                 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
 271         }
 272
 273         omap_fb->pin_count++;
 274
 275         mutex_unlock(&omap_fb->lock);
 276
 277         return 0;
 278
 279 fail:
 280         for (i--; i >= 0; i--) {
 281                 struct plane *plane = &omap_fb->planes[i];
 282                 omap_gem_put_paddr(plane->bo);
 283                 plane->paddr = 0;
 284         }
 285
 286         mutex_unlock(&omap_fb->lock);
 287
 288         return ret;
 289 }
 290
 291 /* unpin, no longer being scanned out: */
 292 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
 293 {
 294         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 295         int i, n = drm_format_num_planes(fb->pixel_format);
 296
 297         mutex_lock(&omap_fb->lock);
 298
 299         omap_fb->pin_count--;
 300
 301         if (omap_fb->pin_count > 0) {
 302                 mutex_unlock(&omap_fb->lock);
 303                 return;
 304         }
 305
 306         for (i = 0; i < n; i++) {
 307                 struct plane *plane = &omap_fb->planes[i];
 308                 omap_gem_put_paddr(plane->bo);
 309                 plane->paddr = 0;
 310         }
 311
 312         mutex_unlock(&omap_fb->lock);
 313 }
 314
 315 /* iterate thru all the connectors, returning ones that are attached
 316  * to the same fb..
 317  */
 318 struct drm_connector *omap_framebuffer_get_next_connector(
 319                 struct drm_framebuffer *fb, struct drm_connector *from)
 320 {
 321         struct drm_device *dev = fb->dev;
 322         struct list_head *connector_list = &dev->mode_config.connector_list;
 323         struct drm_connector *connector = from;
 324
 325         if (!from)
 326                 return list_first_entry_or_null(connector_list, typeof(*from),
 327                                                 head);
 328
 329         list_for_each_entry_from(connector, connector_list, head) {
 330                 if (connector != from) {
 331                         struct drm_encoder *encoder = connector->encoder;
 332                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
 333                         if (crtc && crtc->primary->fb == fb)
 334                                 return connector;
 335
 336                 }
 337         }
 338
 339         return NULL;
 340 }
 341
 342 #ifdef CONFIG_DEBUG_FS
 343 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 344 {
 345         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
 346         int i, n = drm_format_num_planes(fb->pixel_format);
 347
 348         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
 349                         (char *)&fb->pixel_format);
 350
 351         for (i = 0; i < n; i++) {
 352                 struct plane *plane = &omap_fb->planes[i];
 353                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 354                                 i, plane->offset, plane->pitch);
 355                 omap_gem_describe(plane->bo, m);
 356         }
 357 }
 358 #endif
 359
 360 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
 361                 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
 362 {
 363         struct drm_gem_object *bos[4];
 364         struct drm_framebuffer *fb;
 365         int ret;
 366
 367         ret = objects_lookup(file, mode_cmd->pixel_format,
 368                         bos, mode_cmd->handles);
 369         if (ret)
 370                 return ERR_PTR(ret);
 371
 372         fb = omap_framebuffer_init(dev, mode_cmd, bos);
 373         if (IS_ERR(fb)) {
 374                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
 375                 for (i = 0; i < n; i++)
 376                         drm_gem_object_unreference_unlocked(bos[i]);
 377                 return fb;
 378         }
 379         return fb;
 380 }
 381
 382 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
 383                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
 384 {
 385         struct omap_framebuffer *omap_fb = NULL;
 386         struct drm_framebuffer *fb = NULL;
 387         const struct format *format = NULL;
 388         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
 389
 390         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
 391                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
 392                         (char *)&mode_cmd->pixel_format);
 393
 394         for (i = 0; i < ARRAY_SIZE(formats); i++) {
 395                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
 396                         format = &formats[i];
 397                         break;
 398                 }
 399         }
 400
 401         if (!format) {
 402                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
 403                                 (char *)&mode_cmd->pixel_format);
 404                 ret = -EINVAL;
 405                 goto fail;
 406         }
 407
 408         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
 409         if (!omap_fb) {
 410                 ret = -ENOMEM;
 411                 goto fail;
 412         }
 413
 414         fb = &omap_fb->base;
 415         omap_fb->format = format;
 416         mutex_init(&omap_fb->lock);
 417
 418         for (i = 0; i < n; i++) {
 419                 struct plane *plane = &omap_fb->planes[i];
 420                 int size, pitch = mode_cmd->pitches[i];
 421
 422                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
 423                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
 424                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
 425                         ret = -EINVAL;
 426                         goto fail;
 427                 }
 428
 429                 if (pitch % format->planes[i].stride_bpp != 0) {
 430                         dev_err(dev->dev,
 431                                 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n",
 432                                 pitch, format->planes[i].stride_bpp);
 433                         ret = -EINVAL;
 434                         goto fail;
 435                 }
 436
 437                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
 438
 439                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
 440                         dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
 441                                         bos[i]->size - mode_cmd->offsets[i], size);
 442                         ret = -EINVAL;
 443                         goto fail;
 444                 }
 445
 446                 if (i > 0 && pitch != mode_cmd->pitches[i - 1]) {
 447                         dev_err(dev->dev,
 448                                 "pitches are not the same between framebuffer planes %d != %d\n",
 449                                 pitch, mode_cmd->pitches[i - 1]);
 450                         ret = -EINVAL;
 451                         goto fail;
 452                 }
 453
 454                 plane->bo     = bos[i];
 455                 plane->offset = mode_cmd->offsets[i];
 456                 plane->pitch  = pitch;
 457                 plane->paddr  = 0;
 458         }
 459
 460         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 461
 462         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
 463         if (ret) {
 464                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
 465                 goto fail;
 466         }
 467
 468         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 469
 470         return fb;
 471
 472 fail:
 473         kfree(omap_fb);
 474
 475         return ERR_PTR(ret);
 476 }